Projects

Wastewater Treatment

SOUTH ORANGE COUNTY

Southside Plant Improvements and Electrical System Upgrades for J. B.  Latham Wastewater Treatment Plant (JBLWTP)

LEE + RO provided condition assessment, preliminary engineering, final design, and construction support services for $14 million in plant improvements at the 13 mgd capacity JBLWTP.  The project consisted of power supply upgrades, enhanced primary coagulation, rehabilitation of 13 rectangular secondary clarifiers, and structural concrete rehabilitation.  A new electrical building was constructed to house new switchgear and motor control centers (MCCs) that supply power to 3 existing MCCs and 4 new MCCs. New duct banks, conduits, and electrical feeders were constructed throughout. The enhanced primary treatment project included a ferric chloride storage tank, metering pumps, and polymer system.  New chain & flight sludge collectors with 316 SST shafts and SST launders with FRP weirs were installed in 13 secondary clarifiers.  New 316 SST slotted skimmers and telescoping valves were also installed. The mixed liquor isolation gates were replaced with 316 SST downward opening slide gates. Throughout the plant, the failing and spalled concrete was reconstructed to the original lines and grades with new casted imbeds and new coating.

1. WWT JB Latham Improvements & Elec Upgrades
CITY OF COACHELLA

Water Reclamation Plant No. 4 Expansion, Coachella Valley Water District

LEE + RO provided planning, preliminary and final design, and construction management and resident engineering services for a $21 million expansion project, which increased the secondary treatment plant capacity from 6.9 to 9.9 mgd by adding a new 3 mgd nitrogen removing activated sludge plant. Project components included two aeration basins, two circular secondary clarifiers, a blower building with Turblex blowers, an emergency generator, a gravity belt thickener, a sludge dewatering belt press, chlorine contact tanks, and chlorine and sulfur dioxide storage & feeding systems.
2. WWT Reclamation Expansion Coachella
CITIES OF Fountain Valley and Huntington Beach

Anaerobic Digester Rehabilitation Projects Wastewater Treatment Plant Nos. 1 and 2, Orange County Sanitation District

LEE + RO prepared a preliminary design report, final plans and specifications, and provided engineering services during construction for an $11 million digester improvements project for the 200 mgd Treatment Plant No. 2 in Huntington Beach. Plant No. 2 is equipped with 20 digesters and this project rehabilitated 7 digesters and 4 digester control buildings. Project elements included electrical & control system upgrading and automation, addition of sludge flow meters and control valves, sludge and digester gas piping, and structural rehabilitation. For the 150 mgd capacity Plant 1, in Fountain Valley, LEE + RO provided engineering, design, and construction phase services for electrical & control systems portions of a $45 million digester improvement project. The Plant 1 project rehabilitated all 12 digesters to process additional solids from the newly constructed full secondary treatment facilities
3. WWT P OCSD Fountain Val
CITY OF Copperopolis

Copper Cove Wastewater Treatment Plant Phase I Expansion, Calaveras County Water District

LEE + RO provided engineering and construction support services for expansion of the existing 0.25 mgd plant to 0.50 mgd with an ultimate 1 mgd capacity with a peaking factor of 4. This $1.6 million expansion project consisted of the replacement of existing surface aerators in treatment pond 1, pond 2, and finishing pond 3 with 11 new 15 HP aerators. New headworks, including influent pump station with three grinder pumps, bypass metering structure, and a screening facility were also installed. Other new facilities constructed included pond inlet & outlet structures, effluent pipeline, metering structure, chlorination structure, an electrical building, and an emergency generator. All facility improvements were designed for the ultimate plant capacity of 1.0 mgd utilizing Biolac® secondary treatment.

4. WWT P San Andreas
CITY OF PATTERSON

Sludge Dewatering Facility Wastewater Treatment Plant

LEE + RO provided engineering, design, and construction phase engineering services for a $ 2 million biosolids dewatering facility after the City received a Notice of Violation from the Regional Water Quality Control Board over sludge management practices related to use of the drying beds. The final design incorporated a skid mounted 21-inch centrifuge package having a secondary sludge processing capacity of 225 gpm, including sludge feed pump, polymer unit, grinder and conveyors. The skid mounted packaged allowed for rapid installation.
5. WWTSludge Dewatering Patterson
CITY OF Holtville

Wastewater Treatment Plant Upgrading Project

LEE + RO provided process analysis, a project report, final design and construction phase engineering services for $11.8 million in plant upgrades to the existing 0.85 mgd treatment plant. Most of the existing facilities, except the continuous upflow DynaSand filters and UV disinfection system, was replaced. The new facilities added included headworks with a septage receiving facility, grit removal, a Biolac® activated sludge basin with integral secondary clarifiers and aeration blowers, mechanical sludge dewatering and drying beds, a new operations/laboratory building, a new MCC building, and a new emergency standby generator. The upgraded plant is now capable of removing the ammonia nitrogen concentration below the NPDES required concentration of 1.9 mg/l. This project was financed by the Clean Water State Revolving Fund, North American Development Bank, and Border Environmental Coordination Commission. LEE & RO assisted the City with successfully obtaining funds from these agencies.
6. WWT Biolac Basin holtville
CIties OF Fountain Valley and Huntington Beach

Odor Control Scrubber Modifications Wastewater Treatment Plants No. 1 and No. 2, Orange County Sanitation District (OCSD)

OCSD operated 13 chemical odor control scrubbers at Plant No. 1 in Fountain Valley and 14 scrubbers at Plant No. 2 in Huntington Beach. This project optimized the scrubber performance for maximum odor removal with the least chemical consumption. LEE + RO prepared a design report, provided final engineering and design, as well as construction support services for modifications to 27 chemical scrubbers. This $3.5 million project reconfigured pH meters and caustic metering pumps, installed new Vapex H2S analyzers & controls, ATI wet chlorine gas analyzers and controls, modified flowmeters and controls, and modified chemical piping and pumping configuration.

7. WWT P OCSD Fountain Val- Odor Con
CITY OF Coachella

Avenue 54 Wastewater Treatment Plant Expansion and Rehabilitation Project, Phase 2

LEE + RO provided engineering, design and construction management/resident engineering services for a $5.5 million project to increase the plant capacity from 3.0 mgd to 4.5 mgd and to rehabilitate outdated equipment. The project included rehabilitation of the contact stabilization process tanks, replacement of aeration blowers, and the addition of new concrete-lined sludge drying beds and electrical and control system upgrading. LEE + RO prepared a detailed project report to assist the City in successfully securing USDA funding for the entire project.
11. Chapman Water Well No. 7 Arcadia
CITY OF Elk Grove

Regional Wastewater Treatment Plant Aerated Grit Removal Facility & Primary Clarifier Improvements, Sacramento Regional County Sanitation District

The Regional Plant treats average flows of 150 mgd and peak flows of 300 mgd. LEE + RO analyzed influent hydraulics, methods to improve aerated grit removal efficiency, and rehabilitation of the grit transport piping, grit dewatering and truck loading facilities, and odor control systems. A pilot aerated grit removal tank model was constructed and tested for hydraulics, optimized air foil and grit removal efficiency and optimum flow distribution from the grit tanks to the primary clarifiers. LEE + RO subsequently provided design and construction phase engineering services for the $7 million aerated grit system improvement projects that included modifications of the influent channels for the grit removal tanks and primary sedimentation basins, grit transport piping system, grit dewatering and grit truck loading facility.
9. WWT Grit Removal SRCSD Elk Grove
CITY OF Elk Grove

Regional Wastewater Treatment Plant Grit Handling & Dewatering System Rehabilitation, Sacramento Regional County

LEE + RO provided engineering, design, and construction phase engineering services for a $3 million rehabilitation of the grit handling system including the grit piping, cyclones, classifiers, diversion gates, and grit ejectors. The project replaced the old malfunctioning grit ejectors. The grit piping from the ejectors to the classifiers was replaced with shorter length spools and long-radius elbows to reduce and ease maintenance. The grit piping from the primary gallery to the cyclone-washer room was replaced with wear-resistant industrial ABS piping. Additional flushing connections were provided and have greatly reduced plugging. The four classifiers and eight cyclones were replaced and diverter gates between the classifiers and the screw augers were also replaced. New grit cyclone overflow piping from the classifier room to the newly constructed rotary screens was added to centralize grit and screenings dewatering.
10. WWT Grit Handling SRCSD Elk Grove
CITY OF Angels Camp

Wastewater Treatment Plant Phase I

LEE + RO provided process analysis, engineering, and construction management services for the $4.5 million Phase I Expansion and Upgrading project. Phase I included a new headworks with screenings and grit removal, flow equalization, sequencing batch reactors (SBRs), secondary clarifiers, Title 22 filtration, chlorine contact tank, intermediate and effluent pumping stations, aerobic digestion, and sludge drying beds. The 3-million-gallon emergency storage basin was expanded and double-lined with HDPE and leak detection instruments. A Title 22 UV disinfection system for a winter stream discharge was also included.
11. WWT P Improvements Cty of Angels
CITY OF Malibu

Trancas Water Pollution Control Plant (TWPCP), Los Angeles County Department of Public Works

The 0.3 mgd capacity TWPCP, built in 1963, consists of the headworks, influent pump station, primary clarifiers, rotating biological contactor, aerobic digester, sand filters, and effluent leachfields. LEE + RO prepared an engineering report, prepared final design documents, provided engineering services during construction, and assisted the County in securing funding from the Clean Water State Revolving Fund. The $3.9 million in upgrades included the influent pump station, equalization, extended air activated sludge with anoxic selectors, dual media filters, and chlorination. LEE + RO also designed monitoring wells and provided ground water quality monitoring services during construction.
11.5. WWT NoPhoto
CITY OF Thousand Oaks

Headworks Rehabilitation Projects Hill Canyon Wastewater Treatment Plant

LEE + RO provided analysis, design, and construction phase engineering services for a $4.5 million project that consisted of modifications to the North Headworks and rehabilitation of the South Headworks at the 14.5 mgd plant. The North Headworks modification included replacement of augers with mechanically cleaned bar screens and installation of a new grit pump systems, addition of walkways and grit tank covers, and upgrading of the electrical systems. The South Headworks rehabilitation included replacement of the Infilco Degremont climber screens with Huber step screens and screenings conveyors and compactors and upgrading of the electrical systems. The project also included the replacement of piston-type primary sludge pumps with progressive cavity pumps.
12. WWT Headworks Rehab Thousand Oaks
CITY OF Chino

Regional Wastewater Treatment Plant No. 2 (RP-2) Improvements, Inland Empire Utilities Agency

LEE + RO provided process analysis, engineering, final design, and construction phase engineering services for $6 million in improvements at RP 2, the Agency’s regional solids processing plant. The project included solids processing train upgrades including installation of a dewatering centrifuge, retrofit of the cake conveyor system, rehabilitation of gravity and dissolved air flotation sludge thickeners, optimization of the centrate pumping system, and addition of a new septage receiving station. Under this project two dewatering centrifuges, pumps, controls, and conveyors were relocated from RP 4 to the RP 2 dewatering building. The RP 2 dewatering system also includes a centrate handling system.
13. WWT P Improvements IEUA Chino
CITY OF San Diego

Rehabilitation of Primary Sedimentation Basins & Replacement of Sludge and Scum Collectors Point Loma Wastewater Treatment Plant (PLWTP)

LEE + RO was the design engineer of record responsible for engineering, design and construction support services for a $7 million design-build project to rehabilitate 12 primary sedimentation basins at the 240 mgd PLWTP. The 12 sedimentation basins were constructed under five separate contracts from 1962 through 1996. As a result, there were substantial differences in the sludge/scum collectors, such as differences in shaft diameters, drive motors, sprockets, and installation layout. This project replaced a total of 36 longitudinal and 12 cross collectors with new standardized units. The project also included a detailed inspection and condition assessment of each drained basin, repair of damaged concrete and/or coatings and linings, modification of scum spray actuators, and installation of a new 8-inch diameter water main connected to the plant’s industrial water system.
14. WWT Sed. Rehab & Repl Col- PLWTP SD

Wastewater Conveyance

CITY OF Newport Beach

Bitter Point Pump Station, Orange County Sanitation District

LEE + RO provided planning, design, and construction phase engineering including startup/commissioning services for a $21 million, 40 mgd wastewater pump station located in the City of Newport Beach along the Pacific Coast Highway. The pump station was designed with a self-cleaning Ogee Trench wet well and is equipped with five 200 HP WEMCO Hidrostal pumps with VFDs and a 1,250 kW emergency standby generator. The project included a new 12kV 1,500 kVA Southern California Edison electrical service, switchgear, motor control centers, and related mechanical, control and SCADA systems. Design and construction challenges included a tight site located in a tidal zone with deep underground construction in soils with high liquefaction potential. The construction employed a nontraditional “Silent Piling Press-in Method.” The project required approvals from Caltrans, California Coastal Commission, and many CEQA stakeholders. Bitter Point Pump Station was awarded the ENR Award of Merit in 2012.
1. WWC Bitter Point PS OCSD Foun. Val
CITY OF San Diego

Pump Station 2 (PS2) Reliability Improvements

PS2, constructed in 1963 and rated at 432 mgd capacity, conveys the entire wastewater generated from the San Diego area through two 87-inch diameter force mains to the Point Loma Treatment Plant. PS2 is equipped with 8 pumps: 6 driven by 2,250 HP motors and 2 driven by 2,400 HP natural gas engines. Although PS2 has multiple service feeds from San Diego Gas & Electric (SDG&E), PS2 does not meet the EPA Class I Reliability and force main surge protection requirements. LEE + RO performed in-depth system analysis and designed a $38 million reliability improvement project. The project included replacement of two engine drives with 2,250 HP motors drives and VFDs; installation of two 3,000 kW natural gas engine driven generators that are available to pumps at all times for force main surge protection; and installation of two 4,000 kW diesel engine emergency generators. The project also includes an 8,000 sq. ft. and 45 ft. high building to house the generators, cooling systems, electrical switchgear, and cranes. The project includes extensive modification to the SDG&E power feeds and 4.16 kV distribution systems. New generators and pump sequencing controls are configured to prevent surge and meet the Class I reliability criteria. Project challenges included permitting with the San Diego County Air Pollution Control District and power feed arrangements with SDG&E.
2. WWC PS2 Reliability Impmnts San Diego
CITY OF Los Angeles

Rehabilitation of Four Wastewater Pumping Plants (PPs) Bureau of Engineering (BOE)

As part of the system-wide wastewater collection system upgrades undertaken by the City of Los Angeles Bureau of Engineering, LEE + RO provided condition assessment, preliminary design reports, final design and construction support services for the $6.5 million rehabilitation of four pumping plants; (1) the 5,800 gpm Hawaiian PP 677; (2) the 8,000 gpm Wilmington PP 676; (3) the 7,400 gpm Fries PP 666; and (4) the 18,000 gpm San Pedro Pumping Plant 691. Each PP required replacement of dry pit submersible pumps, suction and discharge piping and valves, variable frequency drives (VFDs), emergency generators, and automatic transfer switches. A major component of this project was temporary sewer bypassing since the construction of this work had to take place within active pumping plants. The design included temporary pumping facilities and considered critical parts of the electrical and controls system (i.e. PLC, SCADA, etc.). The scope included condition assessment of wet wells, piping, structures and electrical systems, South Coast Air Quality Management District permitting for the generators, and coordination with the City’s Building and Safety Department for plan check approval.
3. WWC Rehab of 4 PPs BOE Cty of LA
CITY OF SAN Francisco

Stormwater Management Consulting & Engineering Services, Mission Bay Development Authority Catellus Urban Development Corp.

LEE + RO provided stormwater consulting and engineering services for stormwater facilities supporting the multibillion-dollar Mission Bay Development in the City of San Francisco. The LEE + RO engineering assignments included planning, design and construction support services for stormwater collection, pumping, treatment, and disposal facilities. LEE + RO designed four large stormwater pump stations (Pump Station Nos. 1, 4, 5 and 6) with capacities ranging from 50 to 90 cubic feet/second (CFS). The construction cost of each pump station was approximately $7 million. Stormwater Pump Station 1 (pictured) at the Port of San Francisco Boat Launch Parking Lot Block 21 consisted of a 48-inch inlet sewer, CDS stormwater treatment units, pump station, and two 48-inch outfall pipes into the San Francisco Bay. The pump station has five submersible pumps, each rated at 3,000 gpm against 42 feet TDH. Extensive environmental reviews were performed to obtain approval from the City of San Francisco. LEE + RO also performed extensive design coordination and reviews with the City, the Port, regulatory agencies, and various utilities for facility siting, layout, and design details.
4. WWC Stormwater Mgmt Consulting- Mission Bay
CITY OF Newport Beach

14th Street and A Street Wastewater Pump Stations, Orange County Sanitation District

LEE + RO was responsible for station siting, flow measurements, preliminary and final design and construction phase engineering services for the relocation/construction of the 1,800 gpm 14th Street Pump Station and the 800 gpm A Street Pump Station located on Balboa Island in the City of Newport Beach. The construction cost for the two stations was $12 million. Each pump station is equipped with a self-cleaning wet well. The pumps are dry-pit, submersible Hidrostal pumps, driven through variable frequency drives. The unique engineering challenges included public outreach, hydraulic complexity and pump selection, obtaining the necessary permit from the California Coastal Commission, tight construction sites with high groundwater in a tidal zone, and architectural blending of the two stations with the surrounding commercial and residential neighborhoods. (Pictured “A Street” Pump Station Architecture)
5. WWC A St & 14th St PS OCSD FV
CITY OF Sunnyvale

Kifer Lift Station Upgrades

LEE + RO prepared the preliminary design report, final plans & specifications, and provided construction phase engineering and permit acquisition services for a 450 gpm wastewater pump station that included conversion of an existing Smith & Loveless package station to a new submersible facility. The new pump station design includes two 450 gpm submersible pumps (at TDH of 22 feet) driven by 5 hp motors, new electrical controls and sensors, and conversion of the existing dry-pit portion of the pump station to a new wet well.
6. WWC Kifer Lift Station Upgrades
CITY OF Placerville

New York Creek Lift Station

LEE + RO prepared a preliminary design report, final plans and specifications, and provided construction phase engineering services for a wastewater pump station located in El Dorado Hills. The lift station, constructed in 1983, included a wet well with two submersible pumps, an emergency generator with fuel tank, an abandoned chemical storage building, and a surge arrestor tank. This $1.4 million project increased the pumping capacity to 1,600 gpm against 186 feet TDH by installing three new 800 gpm pumps, a T-lock lined concrete wet well, a 200 kW emergency standby generator, a surge control tank, and a granular activated carbon odor control scrubber. Work also included the gravity collection sewers, a force main, new motor control center, PLC-based pump controls, and various site improvements.

7. WWC NY Creek Lift Station EDID Placerville
CITY OF San Diego

Pump Station 65 (PS65) Upgrades

PS65 is equipped with two sets of vertical centrifugal pumps, two 150 HP pumps, and two 400 HP pumps. This $5 million project increased the station capacity and improve reliability. The 400-hp pumps were upgraded to 500 HP pumps with new motors and impellers. A third new 500-hp pump was installed to serve as a standby. The electrical upgrades included replacement of the soft starters with VFDs, new control devices, and new SDG&E transformer. Aside from the capacity upgrade, the existing wet well was modified to incorporate a self-cleaning wet well. Physical hydraulic modeling was performed to determine what modifications to the wet well and suction piping were necessary to optimize the operating conditions and to assure that any modifications to the existing layout delivered uniform flows to the pumps and effectively self-clean the wet well.
8. WWC PS65 Upgrades Cty of SD
CITY OF San Diego

Wastewater Pumping Station 45 (PS45), Trunk Sewers and Force Mains

LEE + RO provided planning, design and construction support services for the $11.9 million PS45 project. The City operated three antiquated pump stations (PS28, 29, and 45) serving the La Jolla, U.C. San Diego and the Torrey Pines Golf Course areas. PS45 is located at the low point within the three stations’ drainage areas. LEE + RO successfully developed a plan for combining PS28, 29, and 45 into a new station at the vicinity of PS45 site. The project required flow modeling of the tributary areas of all three stations for build-out in Year 2050. The constructed project included 10,000 feet of 24-inch diameter trunk sewers and HDPE and ductile iron force mains to divert flows. The depths of the sewers and force mains are between 8 to 25 feet. New PS45 is equipped with two 1,990 gpm pumps (@ TDH of 290 feet), each driven by a 200 hp motor through a variable frequency drive. Portions of the trunk sewer and force main construction were micro-tunneled. The project sites are located within the affluent community of La Jolla near the shoreline and extensive environmental reviews were necessary to obtain the California Coastal Commission permit.
9. WWC PS45 Trunk Sewers & Force Mains Cty of SD
CITY OF Las Flores

San Juan Creek Lift Station, Santa Margarita Water District

LEE + RO provided planning, design and construction support services for a new $4 million sewer pump station conveying wastewater from the new community of Ladera Ranch to the District’s Chiquita Water Reclamation Plant. The lift station has a capacity of 7,500 gpm at TDH of 180 feet and is equipped with four 150 hp, 2,500 gpm dry pit submersible pumps, driven through variable frequency drives. The project included a new building to house the pumps, switchgear and MCC, instrumentation, and an emergency generator with a fuel tank located outside. The project included a 16-inch diameter 7,800 LF force main, a 1,300 LF 15-inch diameter sewer and an 8,200 LF 16-inch diameter nondomestic water line from the Reclamation Plant to the lift station. The pipeline alignments involved crossing of the San Juan Creek and working with on steep slopes with erosion protection issues.
10. WWC San Juan Creek Lift Station SMWD Las Flores
CITY OF San Diego

Sewer Pump Station 13 (PS13) Rehabilitation

PS 13, constructed in 1963, consisted of two 117 gpm drywell pumps (TDH 60 feet) driven by 10 hp motors. PS13 receives wastewater from a comfort station near the beach causing sand to accumulate in the wetwell, which is an enclosed concrete vault (confined space) located inside the drywell. The project replaced the pumps and modified the wetwell such that it no longer creates confined space issues. Additional improvements included the extension of the wetwell outer wall to the top slab, reconfiguration of the top slab to include access manholes to the wetwell and drywell, reconfiguration of the suction and discharge piping, installation of a davit crane on the top slab to perform maintenance and pull the pumps and motors, replacement of the ventilation system, construction of a sand trap upstream of the pump station inlet, and new electrical and control systems for remote monitoring and operation. This $750,000 project received “Outstanding Project of the Year” award from APWA.
11. WWC PS13 Rehab Cty of SD

Water Treatment

CITY OF Los Angeles

Chemical Tank Farms and Chemical Injection Systems at Diemer, Skinner & Weymouth Water Treatment Plants, Metropolitan Water District of Southern California

LEE + RO provided engineering, design, and construction phase engineering services for three large chemical tank farm and chemical injection system projects for the Metropolitan Water District of Southern California supporting their Skinner, Weymouth and Diemer Oxidation Retrofit Program (ORP) projects. The ORP projects remove THM forming compounds via ozonation. The major ORP project components are liquid oxygen storage, ozone generators, ozone contactors, spent ozone destruction system, and chemical systems. The project elements included storage tanks and tank farms, leak containment structures, metering pumps and piping, controls & SCADA, and electrical systems for caustic, sulfuric acid, aqueous ammonia, hydrogen peroxide, sodium hypochlorite, alum, ferric chloride, and polymers. The construction cost for the tank farm at each plant is approximately $8 million.
image001
CITY OF San Diego

Electro-Dialysis Reversal Demineralization Facility Expansion, North City Water Reclamation Plant

The City of San Diego produces 5.5 mgd of 300 mg/l TDS water utilizing General Electric’s Electro-Dialysis Reversal (EDR) demineralization units and produces up to 12 mgd of recycled water by blending. LEE + RO designed new EDR units and other facilities to house the future Advanced Water Treatment pilot plant. Expansion of the existing infrastructure, including piping & valves, electrical & controls, and structures was required to accommodate the new EDR units. The $2.5 million project also included new vertical turbine feed pumps with VFDs, a new electrical building, new electrical duct banks, and power feeders.
2. WT EDR San Diego
CITY OF Torrance

Goldsworthy Desalter Project, Water Replenishment District of Southern California

LEE + RO provided engineering, design, and construction phase engineering services for a $12 million, 2,100 gpm capacity desalter project for the Water Replenishment District of Southern California. The project objectives were to restore the fresh water aquifers by removing trapped seawater plumes and to demineralize groundwater and pump it to the CAL Water and City of Torrance domestic water distribution systems. The project elements included groundwater extraction wells and pump stations, reverse osmosis (RO) process feed pumps, RO product water pumps; RO modules, chemical systems; pipelines for transporting raw water, treated water and brine. Brine is discharged to the County Sanitation District of Los Angeles’ trunk sewer.
3. WT Goldsworthy- Torrance
CITY OF Laguna Hills

Reservoir Management Systems Replacement Projects, Moulton Niguel Water District

LEE & RO provided engineering, design, and construction phase engineering services for the conversion of on-site hypochlorite generation systems and liquid ammonia systems to bulk liquid sodium hypochlorite and ammonia chloramine disinfection systems at eight (8) different domestic water reservoir sites in the Moulton Niguel Water District service area. Each site contains one or two potable water storage reservoirs that supply domestic water to the communities. These reservoirs include, (1) the 10 MG East Aliso Creek Reservoir, (2) the Seville Reservoirs – 2ea. x 1.125 MG, (3) the Mathis-Nellie Gail Reservoirs – 1ea. x 1.75 MG and 1ea. x 4 MG, (4) the 4 MG Crown Valley Reservoir, (5) the 2 MG Highlands Reservoir, (6) the 2.5 MG Marguerite Reservoir, (7) the 4 MG Moulton Peak Reservoir, and (8) the 5 MG Pacific Park Reservoir. The water is disinfected utilizing chloramines in the reservoirs to maintain the residual chlorine concentration prior to delivery to the communities. Each disinfection facility contains new bulk sodium hypochlorite and ammonia storage and feeding systems and includes a masonry block chemical storage building with separate rooms for each chemical, ventilation and split system AC units for the chemical rooms, storage tanks, chemical pumps and piping, reservoir mixers, analyzers and dosage control, chemical leak detection systems, sample and drain piping, electrical, process monitoring and control via SCADA, shower/eyewash stations, and site utilities.
4. WT Reservior Moulton Niguel Laguena Hills
CITY OF San Diego

Engineering and Project Management Support Services for Groundwater Well Field and Plant Expansion

LEE + RO provided engineering and project management oversight during the design and construction phases of this groundwater well field project to preserve the City of San Diego’s interest in this $28 million project, which consists of five new groundwater wells, pipelines, and expansion of the RO system at the Reynolds Groundwater Desalination Facility. The five new wells pump raw brackish water from the underground San Diego Formation Aquifer 800 feet below grade. The raw water is then pumped via 8-inch diameter and 12-inch diameter piping several miles away to the desalination facility where it is treated through reverse osmosis. The new wells and the expansion of the facility increased the potable water production from 5 mgd to 10 mgd. This was a Sweetwater Authority project, but the City of San Diego was responsible for 25 percent of the construction cost, since the aquifer water is a shared resource between the two parties.
5. WT Enginnering & PM Support City of SD_edited
CITY OF Winchester

Washwater Reclamation Plant Upgrading, Skinner Water Treatment Plant, Metropolitan Water District of Southern California

LEE + RO provided engineering, design, and construction phase engineering services for a $7.5 million Washwater upgrading project at the Metropolitan Water District of Southern California’s 600 mgd capacity Skinner Water Treatment Plant. The project included replacement of nine horizontal flocculators with 18 vertical hydrofoil flocculators, replacement of tube settlers and launders, associated structural and electrical systems, and motor control centers. Construction was staged to allow at least two of the three treatment trains to remain in operation at all times. The project also included upgrading of the water quality monitors housed within six concrete monitoring vaults. Upgrading was necessary to accommodate additional monitors, such as turbidity analyzers, pH meters, and particle counters to comply with more stringent EPA requirements.
6. WT WW Reclamation Skinner MWD
CITies OF Winchester, Granada Hills, and Riverside

Bulk Chlorine Containment & Injection Facilities at Skinner, Jensen and Mills Water Treatment Plants, Metropolitan Water District of Southern California

LEE + RO provided engineering, design, and construction phase engineering services for three large bulk chlorine storage and feeding facilities at the Metropolitan Water District of Southern California’s Skinner, Jensen and Mills Water Treatment Plants. The total construction cost for all three facilities was $57 million. Liquid chlorine is delivered in either 90-ton railcars (at Jensen) or 19-ton cargo trailers (at Skinner and Mills). The project included a new bulk chlorine storage building (divided into storage bays housing railcars or cargo trailers and new equipment rooms for evaporators, chlorinators, and electrical), leak detection, emergency ventilation and chlorine scrubber, chlorine ejectors, and water piping. Each facility required careful sequencing of construction, including temporary facilities, to maintain the existing plants in operation. The Jensen facility required considerable rail yard improvements including new tracks, switches and turnouts. LEE + RO also provided technical support during the startup and commissioning phase.
7. WT Chlorine Containment Skinner MWD
CITY OF Carson

Edward C. Little Water Recycling Plant Phase III Expansion, West Basin Municipal Water District

LEE + RO prepared a design-build procurement package with 35% design documents and provided construction support services for West Basin Municipal Water District’s $17 million, Phase III Expansion Project at the Edward C. Little Water Recycling Plant in Carson. Project scope of work included additional microfiltration (MF) and reverse osmosis (RO) treatment trains to the existing plant. The project objective was to facilitate the supply of 5 mgd of recycled water from the Hyperion Wastewater Treatment Plant Secondary Effluent Pump Station for cooling systems at the Chevron El Segundo Refinery. The treatment train project elements included a surge control facility, micro-strainers, MF feed pumps, MF units, RO feed pumps, RO trains, decarbonators, product water wells, low and high pressure product water pump stations, and associated electrical and instrumentation, in addition to new chemical storage & feed systems (hypochlorite, bisulfite, sulfuric acid, and MF cleaning agents).
8. WT E C Little Expansion West Basin
CITies OF Lancaster and Palmdale

Chloramine Disinfection Conversion Projects, Los Angeles County Department of Public Works

LEE + RO provided engineering, design, and construction phase engineering services for an $8.5 million Chloramine Disinfection Conversion Project for the Los Angeles County Department of Public Works. The project converted the existing chlorine disinfection system to chloramine disinfection for 18 separate production water well sites located in the Antelope Valley. Each site was retrofitted with ammonia and chlorine gas storage (either one ton cylinders for large systems or 150 pound cylinders for small systems) complete with associated ammonia and chlorination feed, chemical injection, and chemical sampling and monitoring systems. Sites with chlorine ton cylinders are equipped with chlorine containment and chlorine scrubbing systems.
9. WT Chloramine Disinfection LACDPW L
CITY OF Santa Clarita

Earl Schmidt Filtration Plant, Ammonia System Improvements, Castaic Lake Water Agency

LEE + RO evaluated the ammonia unloading area and site drainage at the Earl Schmidt Filtration Plant and a treated water reservoir located near Castaic Lake in Santa Clarita. LEE + RO designed an ammonia containment system with a monolithic-pour secondary containment with chemical resistant coating, double wall piping, sump pump 7 discharge and electrical/controls. The project also included an HACH 6000 chloramine analyzer along with a sampling system connected to the 48-inch diameter treated water reservoir inlet.
10. WT E Schmidt Ammonia CWLA L
CITY OF Riverside

Chemical System Upgrades and Modules 1 & 2 Rehabilitation, Mills Water Treatment Plant, Metropolitan Water District of Southern California

Metropolitan Water District of Southern California (MWD) expanded the Henry J. Mills Water Treatment Plant (Mills Plant) treatment capacity from 160 mgd to 326 mgd to meet growing water demands in the service area. LEE + RO provided engineering and design services for MWD’s $40 million Chemical System Upgrades and Modules 1 & 2 Rehabilitation projects. The chemical storage and feed systems required upgrading to reliably meet the expanded capacity and to be compliant with current codes and regulations. The systems upgraded included sulfuric acid, hydrogen peroxide, CRP and filter effluent caustic soda, alum/ferric chloride, Poly-DADMAC polymer, sodium hypochlorite, aqueous ammonia, dry polymer and fluorosilicic acid systems. These upgrades included larger capacity chemical feed systems, additional valves and instrumentation, heat- tracing of sodium hydroxide systems to prevent crystallization, replacement of four (4) corroded sodium hydroxide storage tanks (each 20,000 gallons), and an additional 5,000 gallons of aqueous ammonia storage capacity. The Modules 1 & 2 Rehabilitation project included rehabilitation of the existing concrete structures (flocculation basins, settling basins, and filters), replacement of flocculators and other mechanical equipment, upgrades of the solids removal traveling bridges, piping and valves, I&C upgrades and rehabilitation or replacement of electrical equipment including motor control centers (MCCs), panels, field control stations, and power cabling.
11. WT Chem tank farms MWD
CITY OF Paradise

Process Water (Backwash) Recycling Project, Paradise Irrigation District

Paradise Irrigation District operates a 23 mgd capacity conventional water treatment plant consisting of sedimentation, filtration, disinfection, a clear well, and backwash recovery process.  This backwash water recycling project allowed the District to return its process backwash water to the water treatment plant instead of discharging this flow to the District’s Magalia Reservoir.  LEE + RO conducted a backwash recovery process analysis that included mechanical treatment, such as Lamella tube settlers, and upgrading of the existing backwash settling ponds. Designs included earthwork needed to deepen the existing ponds; lining of the ponds; a concrete wall to divide each pond into two cells; underdrain piping within each cell to improve dewatering of the backwash solids; yard piping to return the process backwash water to the water plant; a flowmeter and a flow control valve; and a turbidity meter for monitoring of the returned process water quality, backwash equalization, Lamella settlers, pumps and related mechanical, electrical and control systems.
12. WT Process Water Paradise Irrigation
CITies OF La Verne and Yorba Linda

Solids Handling Facilities, Weymouth and Diemer Water Treatment Plants, Metropolitan Water District of Southern California

LEE + RO provided electrical and instrumentation and controls (I&C) design, and construction support services for two solids handling facilities at Metropolitan Water District of Southern California’s (MWD) Weymouth and Diemer Water Treatment Plants. The new solids handling facilities (each with a construction value of $15 million) allow MWD to handle increased sludge volumes. Each filtration plant, at a peak flow of 500 MGD, and a 20 mg/L of ferric chloride dosage, generates about 40 dry tons per day of sludge. The new solids handling facilities consist of four thickeners, five thickened sludge pumps, three belt presses with associated cake pumps, a polymer feed system, conveyors, sludge hoppers, interconnecting piping, electrical and control systems. Construction was sequenced to minimize plant disruptions during construction. The electrical work included upgrading of the thickener MCC, in addition to two new MCCs in the dewatering facility, and VFDs for sludge pumps, belt presses, cake pumps, and polymer pumps. ETAP software was used to calculate harmonic distortion, short circuit, load flow, heat loads, and voltage drops. The SCADA system consists of a main PLC, with each of the three belt presses having independent PLCs networked to MWD DCS system via TCP/IP Modbus. Control strategies were developed along with loop diagrams. Intelligent P&IDs were prepared in MS PDS software. A fire alarm system was provided with addressable smoke detectors, audible and visual alarms, pull stations, and a wet sprinkler system networked to the main control building. Multi and single mode fiber optic cables were used for the communication backbone for CCTV and security systems.
13. WT Weymouth + Diemer WT MWDSC
CITY OF Alhambra

Water Storage Reservoirs, Waterworks District 40, Antelope Valley, Department of Public Works, Los Angeles County

LEE + RO provided engineering, design, and construction phase services for a $16 million water storage reservoir project consisting of six 3-million gallon capacity reservoirs. The scope of work included inspection and condition assessment, preliminary and final design, cost estimating and construction support. LEE & RO also prepared the Reservoir Operations Plan for operational integration of all 10 reservoirs, including four existing reservoirs and four new production/injection wells. The plan addressed chloramine disinfection, reservoir mixing /filling/ drawdown/ balancing operations, electrical, instrumentation and controls, pressure regulation, SCADA, and site security.
4. CM NoPhoto

Water Conveyance

CITY OF Irvine

Zone 6A Potable Water (PW) and Turtle Rock Zone B+ Recycled Water (RW) Pump Stations Upgrading, Irvine Ranch Water District

LEE + RO provided the analysis, design, and construction management services for $2.5 million upgrades to the 1,400 gpm Zone 6A PW and Zone B+ RW pump stations. Zone 6A PW station capacity was increased to 2,500 gpm and new VFDs and SCADA were added. The Zone B+ RW pump station included new VFDs and flow/pressure regulators. Zone B+ RW station has 7 turbine pumps discharging two headers, which ultimately combine into one main header. The first header receives flow from 3 constant-speed pumps, each rated at 1,330 gpm at 320 feet of TDH. The second header consists of 4 pumps, all rated at 320 feet TDH and driven through VFDs: two 100 hp/1,000 gpm pumps; one 75 hp/500 gpm pump; and one 50 hp/250 gpm pump. The pump lineup was not proper and the system was not operating reliably. LEE + RO performed hydraulic and surge analysis and optimized the system by converting an existing pressure reducing station from a back-up Zone B to a primary Zone D.

2. Zone 6A PW+RW PS Upgrading IRWD Irvine
CITY OF Huntington Beach

Edwards Hill Potable Water Booster Pump Station, City of Huntington Beach

Edwards Hill Potable Water Booster Pump Station, constructed in 2002, has four 1,500 gpm and three 1,250 gpm capacity pumps, each driven by an electric motor-natural gas engine through Johnson right-angle gear. The station had suffered from vibration, noise, excessive heat, hydraulics, capacity and flow control issues, along with numerous electrical deficiencies. LEE + RO performed a comprehensive assessment of the pump station and developed a corrective action plan, equipment pre-purchase documents, and provided engineering design documents.

3. Ewards Hill PW PS Hunting Bch
CITY OF Walnut

Arbor Ridge Reservoir and Pump Station Improvements, Walnut Valley Water District

LEE + RO provided engineering, design and construction support services for a $3 million project consisting of addition of a new reservoir and pump station upgrading. The station had a capacity of 1,825 gpm, with a single 25 hp, 575 gpm vertical turbine pump used to maintain water levels in the hydro-pneumatic tank and a 60 hp, 1,250 gpm pump that served as fire pump. Investigations included hydraulic network analysis and surge modeling. The project increased the station capacity to 3,500 gpm with upgraded electrical and control systems. The project included a new 1 MG welded steel tank with an aluminum dome roof, mixing system and cathodic protection. The work also included acoustic sound barrier walls, grading & paving, security fencing, landscaping and an irrigation system which included a green screen to shield the reservoir from neighbors.

5. Arbor PS Improvements WVWD Walnut
CITY OF Santa Clarita

Earl Schmidt Intake Pump Station Settlement Investigation and Corrective Action, Castaic Lake Water Agency

The pump station was expanded including the addition of two new pumps in 2006. In less than a year of operation, a leak was discovered on the 54-inch pump discharge manifold. Additionally, due to excessive vibration, the pump bearings kept failing. The Agency removed the pumps from service. LEE + RO investigations revealed that defective construction created differential settlement which, in turn, resulted in the pumps and discharge headers being badly misaligned. This $1.2 million corrective action included reconstruction of the buried pump header and reinstallation of individual pump discharges to the header with flexible couplings.
9. ESIPS Invest. CLWA
CITY OF Irvine

San Joaquin Reservoir Flow Control Facility, Irvine Ranch Water District

LEE + RO provided planning, design and construction support services for a $3 million, flow control and pumping facilities project. This project consisted of an 8,250 gpm pumping station (with three 75 hp, 4,125-gpm, VFD-driven pumps), a flow control facility, hypochlorite disinfection facility, and sub-surface water collection and pumping facility at the base of the reservoir dam. The District purchased the reservoir from the Metropolitan Water District and converted it into a reclaimed water storage reservoir, integrating it into their Zone B recycled water system.

10. San Joaquin Res Flow Control IRWD
CITY OF Arcadia

Chapman Water Well No. 7, City of Arcadia

LEE + RO provided project management services for the Chapman Well No. 7 project funded by a USEPA grant. Services included preparing RFPs, reviewing proposals, conducting interviews, and overseeing agreements, invoices, and progress of design and construction management consultants. Work also involved technical reviews of design and constructability issues. Regular project updates were provided to City through advisory committee meetings and progress reports. New Chapman Well No. 7 provides 2,000 gpm of potable water with a 150 hp pumping system. This well replaced existing Chapman Well No. 6, which had shown reduced capacity through its years of service. This $1.6 million project included an on-site sodium hypochlorite generation system for disinfection.

11. Chapman Water Well No. 7 Arcadia
CITY OF Santa Clarita

Saugus Water Wells, Castaic Lake Water Agency

CLWA decided to locate four production wells within six previously selected sites along with pumps, pipelines and disinfection facilities to connect the groundwater wells to the Agency’s existing treated water pipeline. This project is to replace two existing perchlorate impacted wells that are currently out of service and construct two new production wells (2,100 gpm/well or total 8,400 gpm) to handle dry period demands. There are six potential well sites being studied by hydrogeologist. The wellhead facilities include chloramine disinfection system with the chlorine and ammonia storage and feeding equipment and pump station and pipelines. Wellheads, disinfection systems, and other appurtenances will be housed in structures. LEE + RO is evaluating the technical, institutional and legal issues that need to be considered for a preliminary design of the well equipping, pumps, disinfection system, and conveyance infrastructure; secure regulatory permits; review SCE power supply arrangement; storm drain and sanitary sewer needs; ROW and easements; and determine the construction as well as life-cycle cost of the proposed project. The total estimated construction cost is estimated at $7 million.
12. Saugus Wells CLWA
CITY OF Sunnyvale

Hamilton Water Well Mechanical & Electrical Rebuild, City of Sunnyvale

LEE + RO provided condition assessment including well & pump casing inspection, engineering and construction support services for retrofits to wells, wellhead pumps and electrical system. This project replaced well pumps and upgraded electrical equipment. Structural work included evaluating the existing building for capacity to add a hoist for equipment maintenance. Electrical work included adding variable frequency drives, replacing site lighting, and connecting a new standby generator including its integral fueling system. Also obtained permits for hazardous materials handling.

13. Hamilton Water Well Sunnyvale
CITY OF Santa Monica

San Vicente Booster Pump Station (SVBPS) Upgrades, City of Santa Monica

The SVBPS is an underground pump station located below 25th Street in an affluent neighborhood and services the 5 million gallon capacity concrete reservoir under the median along the San Vicente Boulevard. The 7,500 gpm pump station is equipped with 6 pumps (four 150 hp and two 40 hp sizes). Pump 6, was equipped with a dual-drive (connected to a 150 HP engine drive and a 150 HP motor drive) which serves as the emergency pump. This $1.8 million project provided a new 750 kW emergency generator and replaced a pump. Due to the restricted opening to the underground pump station, disassembled parts of the generator, pump, electrical parts, and fuel tanks were brought into the pump station and reassembled. LEE + RO obtained generator permit from the South Coast AQMD and provided public relation during construction by mitigating noise and emissions from pump station and the new larger generator.
14. San Vicente PS Upgrades Santa Monica

Recycled Water

CITY OF Spring Valley

30-Inch Diameter, 6-Mile Long, Reclaimed Water Transmission Main, Otay Water District

LEE + RO was responsible for the alignment study, surveying, geotechnical evaluation, environmental and permitting services, right-of-way acquisition, preliminary design, final design and construction phase engineering services for a $17 million, 6-mile long, 30-inch diameter recycled water pipeline from the City of San Diego’s South Bay Water Reclamation Plant (Dairy Mart Road) to the District’s 450-1 Recycled Water Reservoir. The construction employed a wide variety of techniques including horizontal directional drilling (HDD) to cross Interstate 805, Otay River, and State Route 905. LEE + RO successfully obtained Caltrans encroachment permits for three freeway crossings and a rarely issued longitudinal encroachment permit for construction of over 1,400 LF of open trench pipeline within the Caltrans right-of-way. Other significant permits obtained included a California Coastal Commission permit, U. S. Army Corps of Engineers Section 404, U. S. Fish & Wildlife, Bureau of Reclamation, California Fish & Game, California Department of Public Health, California Region Quality Control Board, Department of Labor (tunneling). After a thorough geotechnical investigation, LEE + RO designed a 1,500 foot long horizontal directionally drilled (HDD) 30-inch diameter welded steel pipeline crossing of the entire Otay River Valley with a depth of over 50 feet below the river bottom. This project was awarded “Water Reuse Project of the Year,” “ASCE Outstanding Project of the Year” and “CMAA Project Achievement Award.”
1. R Otay Spring
CITY OF Irvine

Planning Area 18 Zone B to C Recycled Water and Zone 3 to 4 Domestic Water Booster Pump Station, Irvine Ranch Water District

LEE + RO provided the preliminary design report, engineering design and construction phase engineering services for this $4.1 million combined domestic water (DW) and recycled water (RW) pumping facility for a new 255-acre residential development for Irvine Ranch Water District. The DW pump station consists of four 15 HP and two 100 HP VFD driven pumps including standby with a capacity of 2,170 gpm. The RW pump station consists of four 15 HP VFD driven pumps with a capacity of 475 gpm. Project tasks included connections and tie-ins to existing facilities, utility research & permitting, surge analysis, site, structural, mechanical, HVAC, architectural, and electrical and instrumentation designs.
2. R Area 18 PS IRWD Irvine
CITY OF Palm Desert

High and Low Pressure Recycled Water Pump Stations, Water Reclamation Plant No. 10, Coachella Valley Water District

LEE + RO prepared a preliminary design report, final design, and provided construction management and resident engineering services for two recycled water pumping stations (one high-head and one low-head) as a part of this $11 million Title 22 Water Recycling Plant project at the Coachella Valley Water District’s Water Reclamation Plant 10 in Palm Desert. The high head pumping station consists of five (5) 3,000 gpm capacity pumps (TDH of 400 feet), each driven by a 400 hp motor through variable frequency drives. The low-head pumping station included four (4) 3,750 gpm capacity pumps (TDH 230 feet), each driven by a 300 hp motor through variable frequency drives. The project included a new electrical substation with 12 kV power distribution loops and two new motor control centers; PLC controls; and one 5 million gallon capacity reservoir.
3. R High-Low Press. RW PS coachella
CITY OF Irvine

Zone D 30-Inch Recycled Water and Coastal Zone 4 24-Inch Potable Water Transmission Pipelines, Irvine Ranch Water District

These major pipelines ($7.5 million construction cost) were key elements in supplying water to the Irvine Company's Coastal Area Development in the City of Newport Beach. Meticulous planning was required in the development of this project, including determining water demands, water supply sources, and evaluation of alignment alternatives through rugged terrain and environmentally sensitive areas. The project included 8,000 LF of 30-inch diameter recycled water mains and 10,000 LF of 24-inch diameter domestic water mains crossing and adjacent to the San Joaquin Hills Freeway. LEE + RO prepared design plans and specifications, including preparation of legal descriptions for ROW acquisitions. Extensive coordination with Caltrans, Transportation Corridor Agency, Orange County Environmental Management Agency, Irvine Company, and City of Irvine was required during the design. LEE + RO also designed a new potable water service turnout on the Metropolitan Water District of Southern California’s 54-inch diameter East Orange County Feeder No. 1 to supply water to the Zone 4 Pumping Station.
4. R Zone D 30 In recycle IRWD
CITY OF Carson

Edward C. Little Water Recycling Plant Phase III Expansion, West Basin Municipal Water District

LEE + RO prepared a design-build procurement package with 35% design documents and provided construction support services for West Basin Municipal Water District’s $17 million, Phase III Expansion Project at the Edward C. Little Water Recycling Plant in Carson. Project scope of work included additional microfiltration (MF) and reverse osmosis (RO) treatment trains to the existing plant. The project objective was to facilitate the supply of 5 mgd of recycled water from the Hyperion Wastewater Treatment Plant Secondary Effluent Pump Station for cooling systems at the Chevron El Segundo Refinery. The treatment train project elements included a surge control facility, micro-strainers, MF feed pumps, MF units, RO feed pumps, RO trains, decarbonators, product water wells, low and high pressure product water pump stations, and associated electrical and instrumentation, in addition to new chemical storage & feed systems (hypochlorite, bisulfite, sulfuric acid, and MF cleaning agents).
5. R West Basin
CITY OF Irvine

Turtle Rock Zone B+ Recycled Water (RW) and Zone 6A Potable Water (PW) Pump Stations Upgrading, Irvine Ranch Water District

LEE + RO provided the analysis, design, and construction management services for $2.5 million in upgrades to the 1,400 gpm Zone 6A PW and Zone B+ RW pump stations. Zone 6A PW station capacity was increased to 2,500 gpm and new VFDs and SCADA were added. The Zone B+ RW pump station included new VFDs and flow/pressure regulators. The Zone B+ RW station is equipped with 7 turbine pumps discharging into two headers, which ultimately combine into one main header. The first header receives flow from 3 constant-speed pumps, each rated at 1,330 gpm at 320 feet of TDH. The second header consists of 4 pumps, all rated at 320 feet TDH and driven through VFDs: two 100 hp/1,000 gpm pumps; one 75 hp/500 gpm pump; and one 50 hp/250 gpm pump. The original pump lineup caused the system to not operate reliably. LEE + RO performed hydraulic and surge analysis and optimized the system by converting an existing pressure reducing station from a back-up Zone B to a primary Zone D system.
6. R Zone 6A PW+RW PS Upgrading IRWD Irvine
CITY OF Walnut

Parker Canyon Recycled Water Reservoir & Bourdet Pumping Station Improvements, Walnut Valley Water District

LEE + RO provided engineering, design, and construction phase engineering services for a $4.5 million project consisting of a new 1.3 MG recycled water reservoir, the addition of a new 750 gpm capacity vertical turbine pump and the addition of two stages to the two existing turbine pumps at the Bourdet Booster Pump Station. A cast-in-place, two-celled concrete reservoir was designed after analyzing circular Type I & III pre-stressed concrete, rectangular concrete and steel reservoirs. Other improvements consisted of extensive site grading, new retaining walls, access roads and landscaping, electrical, controls and SCADA system improvements.
7. R Walnut Valley Water District Top slab Rebar parker canyon
CITY OF Irvine

San Joaquin Reservoir Flow Control Facility, Irvine Ranch Water District

LEE + RO provided planning, design and construction phase engineering services for a $3 million, flow control and pumping facilities project for the Irvine Ranch Water District. This project consisted of an 8,250 gpm pumping station (with three 75 hp, 4,125-gpm, VFD-driven pumps), a flow control facility, hypochlorite disinfection facility, and sub-surface water collection and pumping facility at the base of the reservoir dam. The District purchased the reservoir from the Metropolitan Water District and converted it into a reclaimed water storage reservoir, integrating it into their Zone B recycled water system.
8. R Irvine Recycled
CITY OF San Diego

48-Inch Diameter and 60-Inch Diameter Recycled Water Pipelines

LEE + RO prepared a preliminary design report, construction drawings and specifications, and provided construction phase engineering services for a $8.5 million project consisting of 20,000 LF of 48-inch diameter and 60-inch diameter recycled water transmission pipelines, and 1700 LF of 4-inch to 18-inch-diameter service outlets. The project included extensive utility research and coordination, alignments studies, pipeline plan and profiles, traffic control plans, traffic signal modifications, pipeline tunneling plans, resolution of environmental and geotechnical issues, and construction cost estimates. The project also required planning and coordination to provide connections for the proposed recycled water irrigation system retrofit for the Miramar Naval Air Station golf course. The pipeline’s crossing over a canyon required design of a support system connected to an existing bridge.
9. R 48 inch Water Transmission City of San Diego
CITY OF San Gabriel Valley

Recycled Water Project Phase II B Package 4 Pipelines in City of Industry, Upper San Gabriel Valley Municipal Water District

LEE + RO provided a preliminary design report, detailed design, and construction phase engineering services for 24,000 LF of 4-inch thru 12-inch diameter recycled water distribution pipelines and a new pump station for the Shadow Oaks Park. The design for this $2.3 million project required hydraulic modeling under different service scenarios and extensive coordination with water utilities - Suburban Water Systems and the City of West Covina.
10. R Upper San Gabriel Valley Recylced
CITY OF Long Beach

Recycled Water Conversion Projects, Water Department

LEE + RO provided construction management and construction inspection (CM/CI) services for a recycled water conversion project that included the disconnection of potable water supplies from park irrigation systems and providing new recycled water connections, meters, and related piping. The project included a 6,100 LF, 6-inch diameter ductile iron pipeline constructed in a congested Ocean Boulevard in downtown Long Beach. The project also included testing to prevent cross connection between domestic and recycled water systems. The inter-tie project included a hot tap on a 12-inch ACP water main, a new meter vault, hydrant, blow-off, and a hot tap on a Golden State Water Company water main.
11. R Recycled Water Conversion Projects Long Beach water Dept
CITies OF Torrance and El Segundo

Construction Management/Construction Inspection & Testing Services, Anza Avenue Lateral & Imperial Avenue Lateral Projects, West Basin Municipal Water District & US Army Corps of Engineers

LEE + RO provided construction management, inspection and testing coordination services in addition to community outreach support to the West Basin Municipal Water District and the U.S. Army Corps of Engineers-Los Angeles District (USACOE) for the construction of the Anza Avenue Lateral and Imperial Avenue Lateral. The Anza Avenue Lateral Project included the installation of 14,500 lineal feet of 8-inch diameter, 6-inch diameter, and 4-inch diameter recycled water pipeline, providing recycled water to parks and schools for landscape irrigation applications within the City of Torrance. The Imperial Avenue Lateral Project included the installation of 4,700 lineal feet of 6-inch diameter recycled water pipeline, providing recycled water to parks and greenbelt for landscape irrigation application along Imperial Avenue in the City El Segundo. In addition to inspection and testing services, LEE + RO provided project supervision, quality assurance services, and coordination of construction testing, start-up, and project close-out services, including recommendation for final acceptance, verification of the accuracy of record drawings, and assembly of final warranties, guarantees and operation & maintenance manuals.
12. R Anza Avenue Lateral West Basin Torrance and El Segundo

Electrical

CITY OF La Verne

Emergency Power Generation / Electrical Reliability Improvements Project, Weymouth Water Treatment Plant

The plant-wide power distribution system for the 600 mgd Weymouth Water Treatment Plant constructed in 1940 was configured with 12 kV incoming power stepped down to 2.4 kV and distributed to 13 unit substations. To support several planned large capital projects, the Metropolitan Water District of Southern California (MWD) retained LEE + RO to develop a comprehensive “Power Distribution Reliability Study.” MWD subsequently engaged LEE + RO to design, in accordance with the conclusions and recommendations in the report: (1) a new Switchgear/Generator Building to house the 4.16 kV switchgear feeding power to the entire plant from the new Southern California Edison 66 kV incoming electrical service; (2) two 2,250 kW capacity diesel-driven emergency generators; and (3) a new 4.16 kV power grid distributing power to unit substations throughout the plant. LEE + RO also provided construction phase engineering services for this $21 million construction project.
1. E Weymouth WTP MWD Los Ang
CITY OF Los Angeles

Colorado River Aqueduct (CRA) Pumping Plant Electrical System Improvements

Metropolitan Water District of Southern California (MWD) operates five CRA pumping plants (Intake, Gene, Iron Mountain, Eagle Mountain, and Hinds) to transport Colorado River water to Lake Mathews. Each pumping plant has nine 6.9 kV main pump motors. This project upgraded the plants by installing 230 kV current limiting reactors to reduce the available fault current at the 6.9 kV switchhouses. LEE + RO analyzed the behavior of the existing switchhouse bus bars during a fault and determined where to best brace the bus. LEE + RO also provided the design for the replacement of forty-two 230 kV disconnect switches used to isolate vacuum circuit breakers during system outages, installation of a fiber optic cable for SCADA communication, and installation of ground mats for operator safety. The total project construction cost was $9.8 million.
2. E CRA Pumping Plnt Imp MWD
CITY OF Fountain Valley

Steve Anderson Wastewater Pump Station, Orange County Sanitation District

LEE + RO provided planning, engineering and design, and construction support services for the electrical, and instrumentation/SCADA systems supporting the new 60 mgd Steve Anderson Wastewater Pump Station. The project objective was to balance the flow between Wastewater Treatment Plant 1 and Plant 2 and to provide adequate flow to the 70 mgd Groundwater Replenishment System (GWRS) project. This $30 million pump station is equipped with six 10 mgd Wemco Hidrostal pumps driven by 200 hp motors through variable frequency drives. The 12 kV power is fed from the Central Generation System to the pump station through Power Building 3.
3. E Steve Anderson PS OCSD Foun Val
CITY OF Los Angeles

Owens Lake Dust Mitigation Program, Electrical Distribution and Control Systems, Department of Water and Power

Under the multi-phase Owens Lake Dust Mitigation Program, the Los Angeles Department of Water and Power (LADWP) implemented $300 million in environmental restoration program projects. LEE + RO provided electrical, control systems, and instrumentation system engineering, design, and construction support services for a wide variety of dust control and mitigation projects. The facilities included dozens of control valve facilities, water pump stations, water treatment and distribution systems, chemical storage and handling facilities, heat tracing, insulation, cathodic protection, transformers, many miles of 4.8 kV and 480 V power distribution system & cables, radio telemetry stations, SCADA systems, and a moat and row conversion to shallow flooding to comply with regulatory requirements for dust mitigation. The designs included single line diagrams, panel schedules, site plans/turnouts, wiring plans and details, pipe heat tracing, control diagrams, and electrical details.
4. E OLDMP Elec Dist & Control Sys
CITY OF Santa Clara

Rabello and Northside Wastewater Pump Stations, Emergency Generator Projects

LEE + RO provided analysis, design and construction support services for the replacement of emergency standby generators at the 23.5 mgd Rabello Pump Station and the 18.9 mgd Northside Pump Station. At the Rabello station, a new 600 kW generator along with an 800A capacity NEMA 1 automatic transfer switch and 300 kW load bank were installed. At the Northside station, a 300 kW generator along with a 600A capacity NEMA 3R automatic transfer switch and 150 kW load bank were installed. Designs of this $1.4 million project included integration of the generator/ATS into the existing electrical and PLC/SCADA systems and included 72-hours of diesel fuel storage. LEE + RO procured the Bay Area Air Quality Management District permit and other construction permits as well as designed the civil site improvements necessary to fit the large fuel storage tanks within the site.
5. E Rabello & Northside WWPS Santa Clara
CITY OF San Jose

Pacheco Pumping Plant Upgrade and Adjustable Speed Drive Replacement, Santa Clara Valley Water District

LEE + RO provided study and analysis, design and construction phase engineering services for a $14 million electrical & mechanical system improvement project for the 350 CFS capacity Pacheco Pumping Plant (PPP). PPP has twelve (12) main pumps with wound rotor motors rated for 2,000-hp each. The existing motor starters/controls were 1970s technology - Toshiba Adjustable Speed Drives (ASDs). The project included replacement of the 4,160 volt ASDs with new variable frequency drives (VFDs), testing of the 2,000-hp motor drives per NETA and IEEE requirements, structurally retrofitting the pump gallery to accommodate the new VFDs, installation of a new flowmeter and RTU and SCADA connections for each of the 12 pump discharge lines, replacing HVAC and chillers, and optimization of pump controls.
6. E Pacheco PP & ASD Repl San Jose
CITY OF Santa Clarita

Sand Canyon Pumps Station Standby Power Generation Facility, Castaic Lake Water Agency (CLWA)

LEE + RO provided system analysis, engineering, design and construction phase engineering services for a $4.5 million 1,750 kW standby power generation system project. Sand Canyon Pump Station (SCPS), built in 2006 and equipped with six 900-hp vertical turbine pumps, did not have standby power. LEE + RO evaluated replacement of the three motor drives with natural gas engines and a new a standby generation facility. The project constructed included a new generation facility with two new 1,750 kW diesel-fueled generators with 72-hour fuel storage, a new building to house the generators, electrical switchgear, and automatic transfer switches. The unique design features included the use of the product water for engine cooling in conformance with NSF 61. Project challenges included obtaining a South Coast Air Quality Management District permit due to the facility’s proximity to a K-12 school.
7. E SCPS CLWA Santa Clarita
CITY OF Alhambra

West Coast Basin Barrier Telemetry Upgrading Project, Department of Public Works, Los Angeles County

LEE + RO performed field condition assessments, prepared design documents, and provided construction phase engineering services for a $1.3 million telemetry system upgrading project. The County operates three barrier projects; (1) the West Coast Basin Barrier (WCBB), (2) the Alamitos Barrier, and (3) the Dominguez Gap Barrier. The WCBB has 153 injection wells (located in 42 separate sites) and a total capacity of 30 cfs. The WCBB receives water from the Metropolitan Water District of Southern California and West Basin Municipal Water District. The WCBB telemetry system collects monitoring data (flow, level, pressure, chlorides, etc.) from the 153 injection wells and transmits the data to the central monitoring stations. This upgrading project included 42 remote I/O drops, PLCs, a Siemens Profinet data management system and a new signal transmission system.
8. E W Coast Basin Barrier DPWLAC
CITies OF La Verne and Yorba Linda

Electrical, Instrumentation & Control Systems for Solids Handling Facilities at the Weymouth and Diemer Water Treatment Plants, Metropolitan Water District of Southern California

LEE + RO provided engineering, design and construction phase engineering services for the electrical, instrumentation & controls systems for the new sludge thickening, dewatering, and trucking facilities at two large Metropolitan Water District of Southern California (MWD) water treatment plants. Construction costs were $14 million for Weymouth and $16 million for the Diemer Plant. Project components included new Southern California Edison electrical feeds, new 4.16 KV and 480 V power distribution systems, new switchgear and motor control centers, lighting, process controls, fire alarms, and communication systems.
9. E &IC Systems Wey Diemer MWD
CITY OF Fountain Valley

Groundwater Replenishment System, Orange County Water District

LEE + RO provided electrical engineering, design and construction phase engineering services for the microfiltration (MF), chemical systems, and the reverse osmosis (RO) transfer pump station that comprised parts of the $400 million, 70 mgd Groundwater Replenishment System Project (GWRS) project. The GWRS project components include MF/RO and UV disinfection, and pumping. The electrical system LEE + RO designed included a new Southern California Edison electrical feed, 4.16 kV switchgear, 4.16 kV and 480 V motor control centers and power distribution systems, lighting and controls. The RO transfer pump station is equipped with five 4.16 kV, 600-hp pumps driven through Allen Bradley variable frequency drives.
10. E Groundwater RS OCWD Foun Val
CITY OF Fountain Valley

Rehabilitation of Anaerobic Digesters, Wastewater Treatment Plant No. 1, Orange County Sanitation District

LEE + RO provided electrical condition assessment, reliability analysis, design and construction phase engineering services for the electrical and instrumentation & control systems improvements to 12 large anaerobic digesters and four digester control buildings at the 150 mgd capacity Orange County Sanitation District (OCSD) Plant No. 1 in Fountain Valley. Plant No. 1 was converted to full secondary and the District needed to process additional secondary sludge and improve the efficiency of sludge digestion without building new digesters. The project included new Power Building 5, 12 kV switchgear modifications, addition of four new 2,500 kVA transformers, four double-ended 480v MCCs with two automatic transfer bus switching systems for additional reliability, and power, lighting, motor controls & instrumentation, as well as SCADA system upgrading for the 12 digesters.
11. E Rehab & Anaerobic Digesters WWTP 1 OCSD
CITY OF Ontario

Water and Sewer Facilities Electrical System Assessment and Well Facility Backup Power Project

LEE + RO performed condition assessments on 24 groundwater production wells, 5 booster pump stations, and 3 sewer lift stations. Short circuit fault analyses, protective device coordination studies and arc flash hazard analyses were performed at each of the sites. LEE + RO completed a Backup Power Evaluation & Assessment report for 18 wells and three booster pump stations. In accordance with the study recommendations, LEE + RO prepared the construction documents for the backup power systems for Well No. 37, 38, 39 and 47. The project included a 1,280 KW mobile generator and modifications to the well sites to enable generator hook ups. LEE + RO also provided construction management services including submittal reviews, construction inspection, resident engineering, and start-up & commissioning for this $7 million project.
12. E Wtr & Swr Facs Elec Sys. Assess. Ontario
CITY OF Dana Point

J. B. Latham Wastewater Treatment Plant Electrical System Upgrades, South Orange County Wastewater Authority

LEE + RO provided system analysis, final design and construction phase engineering services for a $5 million electrical system upgrading project at South Orange County Wastewater Authority’s (SOCWA) 13 mgd capacity J.B. Latham Wastewater Treatment Plant. A new switchgear was constructed at the NE corner of the treatment plant, adjacent to Secondary Clarifier No. 13. To facilitate the new switchgear, an existing building was demolished. Work required close coordination with Sempra Utilities for a new electrical service and transformer. The new switchgear supplies power directly to three existing motor control centers; MCC-L, MCC-1, and MCC-2; three new motor control centers to replace existing MCC-J, EMCC-J, and MCC-K; and a new motor control center, MCC-N. New duct banks, conduits, and electrical feeders were constructed between the new switchboard and the Plant No. 2 aeration blowers for the new MCC-J, EMCC-J, MCC-K, and MCC-N. For MCC-L, MCC-1 and MCC-2, new duct banks and conduits were constructed between the new switchboards.
13. E JB Latham WWTP Dana Pt
CITY OF Pasadena

Chapman Well Electrical Facilities Upgrades, City of Pasadena Water & Power Department

LEE + RO provided engineering design, construction phase engineering, and construction inspection services for this well facility upgrades project. The well facility was originally constructed in 1967. A new climate-controlled building was constructed to house a new 480V switchboard and motor control center (MCC) sections. The existing 350-hp well pump motor and controls were replaced, and a new 500 kVA transformer was provided. The City now has the ability to run the pump across the line or through reduced voltage soft start (RVSS). Other features included relocation of the existing PLC and telemetry equipment, an emergency generator power connection, chlorine feed monitoring, and surge tank control feedback and controls.
14. E Chapman Well- Pasadena

Condition Assessment

CITY OF Santa Monica

Condition Assessment and Evaluation of Moss Avenue, Pump Station (MAPS)

MAPS is a 26 mgd capacity wastewater pump station conveying raw sewage into the Coastal Interceptor Sewer (CIS) owned by the City of Los Angeles. MAPS is located across the street to the Santa Monica Beach Pier and must remain operational at all times and comply with EPA Class I Criteria. MAPS expected to receive more flow from the Santa Monica Bay Dry Weather (Low Flow) Diversion projects. In addition, the CIS, which is expected to reach at maximum capacity within two years, impacts the MAPS force main capacity. LEE + RO to performed in depth facility condition and functional assessment of mechanical, electrical, instrumentation & controls and SCADA, structural, wear and tear, corrosion, and odor control, and prepared a preliminary engineering report summarizing the results of assessment, future capacity needs, hydraulic analysis, and recommended capital improvement projects.
1. CA Santa Monica MAPS
CITY OF Santa Clarita

Earl Schmidt Intake Pump Station Settlement Investigation and Corrective Action, Castaic Lake Water Agency

The Earl Schmidt Intake Pump Station was expanded in 2006 and included the addition of two new pumps. In less than a year of operation, a leak was discovered on the 54-inch diameter pump discharge manifold. In addition, the pump bearings kept failing due to excessive vibration and the Agency removed the pumps from service. The Agency engaged LEE + RO to conduct an assessment and develop a corrective action plan. LEE + RO’s investigations revealed that defective construction created differential settlement which, in turn, resulted in the pumps and discharge headers being badly misaligned. The $1.2 million corrective action included reconstruction of the buried pump header and reinstallation of individual pump discharges to the header with flexible couplings.
2. CA Earl Schmidt Intake Santa Clarita
CITY OF Foster City

Water Main Condition Assessment & Replacement, California Department of Public Health

LEE + RO performed a condition assessment and designed the replacement of three 24-inch valves and 9 air release valves (ARVs). The limited one-week shutdown was carefully coordinated with the City and other adjacent cities. LEE + RO worked with the California Department of Public Health (CDPH) to obtain a variance on recent legislation for potable water pipelines that would have required the City to relocate all of the existing underground ARVs to aboveground to avoid potential cross-contamination. The in-line flow preventers on each ARV recommended by LEE + RO was accepted by CDPH and saved the City considerable time and expense with construction and easement acquisition. The $750,000 construction project was successfully completed with only three days of shutdown.
3. CA Foster City Assessment
CITY OF South Orange County

Southside Plant Improvements and Upgrades, J. B. Latham Wastewater Treatment Plant (JBLWTP), South Orange County Wastewater Authority

LEE + RO conducted a condition assessment and provided preliminary engineering, final design documents and construction support services for a $14 million plant improvements at the 13 mgd capacity JBLWTP. In addition to electrical power supply upgrades, LEE + RO prepared design documents for the rehabilitation of 13 rectangular secondary clarifiers and structural concrete rehabilitation. A new chain & flight sludge collector with 316 SST shaft and SST launders with FRP weirs were installed in 13 secondary clarifiers. Also 316 SST slotted skimmers and telescoping valves were installed. The mixed liquor isolation gates were replaced with 316 SST downward opening slide gates. Throughout the plant failing and spalled structural concrete was reconstructed to the original lines and grades complete with new casted imbeds and coating.
4. CA Southside Plant So Oange County WA
CITY OF Huntington Beach

Edwards Hill Potable Water Booster Pump Station

Edwards Hill Potable Water Booster Pump Station, constructed in 2002, has four 1,500 gpm and three 1,250 gpm capacity pumps, each driven by an electric motor-natural gas engine through a Johnson right-angle gear. The station had suffered from vibration, noise, excessive heat, hydraulic issues, capacity and flow control issues, along with numerous electrical deficiencies. LEE + RO performed a comprehensive condition assessment of the pump station and prepared a corrective action plan, developing equipment pre-purchase documents and provided engineering design documents for the City of Huntington Beach.
5. CA Huntington Beach - Edwards Hill
CITY OF Cypress

Sanitary Sewer Replacement & Rehabilitation, Engineering and Design Services

LEE + RO provided design, bid phase, and construction phase engineering services for the city-wide rehabilitation and replacement of various sanitary collection and trunk sewers with sizes ranging from 8-inches to 18-inches in diameter. LEE + RO’s NASSCO-certified PACP engineers reviewed CCTV records and performed detailed condition assessments to determine appropriate rehabilitation methods and/or replacements. LEE + RO completed seven groups of projects, each with a construction cost ranging from $750,000 up to $1.5 million (total aggregate construction cost was $12 million). Cured-in-Place Pipe (CIPP) rehabilitation and open-cut replacement construction were the predominant methods used. LEE + RO was responsible for designing and coordinating flow diversions from the City sewers to the Orange County Sanitation District’s interceptor sewers to facilitate construction.
6. CA NoPhoto
CITY OF Ontario

Water and Sewer Facilities Electrical System Assessment

LEE + RO performed a condition assessment of 24 groundwater production wells, 5 booster pump stations, and 3 sewer lift stations and performed a short circuit analysis, protective device coordination study and an arc flash hazard analysis the electrical gear at each site. LEE + RO completed a Backup Power Evaluation & Assessment report for 18 wells and three booster pump stations. Report recommendations included a 1280 kW mobile generator and modifications to the well sites to enable generator hook ups at Well Nos. 37, 38, 39 and 47.
7. CA Ontario Municipal Utilities Water and Sewer Facilities
CITY OF La Verne

Power Distribution Reliability Study, Weymouth Water Treatment Plant, Metropolitan Water District of Southern California

The plant-wide power distribution system for the 600 mgd Weymouth Water Treatment Plant constructed in 1940 was configured with 12 kV incoming power stepped down to 2.4 kV and distributed to 13 unit substations. To support several large capital projects planned, the Metropolitan Water District of Southern California retained LEE + RO to develop a comprehensive “Power Distribution Reliability Study.” Report recommendations included: (1) a new Switchgear/Generator Building to house the 4.16 kV switchgear feeding power to the entire plant from a new Southern California Edison 66 kV incoming service; (2) two 2,250 kW capacity diesel-driven emergency generators; and (3) a 4.16 kV power grid distributing power to unit substations throughout the plant.
6. CA NoPhoto
CITY OF Alhambra

West Coast Basin Barrier Telemetry Upgrading Project, Los Angeles County Department of Public Works

LEE + RO performed field condition assessments, prepared design documents, and provided construction phase engineering services for a $1.3 million telemetry system upgrading project for the Los Angeles County Department of Public Works. The County operates three barrier projects: (1) the West Coast Basin Barrier (WCBB), (2) the Alamitos Barrier, and (3) the Dominguez Gap Barrier. WCBB has 153 injection wells (located in 42 separate sites) and a total capacity of 30 cfs. WCBB receives water from the Metropolitan Water District and West Basin Municipal Water District. The WCBB telemetry system collects monitoring data (flow, level, pressure, chlorides, etc.) from the 153 injection wells and transmits the data to the central monitoring stations. This project included 42 Remote I/O Drops, PLCs, a Siemens Profinet data management system and a signal transmission system.
9. CA LADPW - West Coast Basin Barrier
CITY OF Sunnyvale

Hamilton Water Well Mechanical & Electrical Rebuild

LEE + RO performed a condition assessment, including well & pump casing inspection, and provided engineering and construction support services for retrofits to wells, wellhead pumps and the electrical system. This project replaced well pumps and upgraded electrical equipment. Structural work included evaluating the existing building for capacity to add a hoist for equipment maintenance. Electrical work included adding variable frequency drives, replacing site lighting, and connecting a new emergency standby generator, including its integral fueling system.
6. CA NoPhoto
CITY OF Fountain Valley

Rehabilitation of Anaerobic Digesters, Wastewater Treatment Plant No. 1, Orange County Sanitation District

LEE + RO provided an electrical condition assessment and reliability analysis, design and construction phase engineering services for the electrical and instrumentation & control systems improvements to 12 large anaerobic digesters and four digester control buildings at Orange County Sanitation District’s 150 mgd capacity Plant No. 1 in Fountain Valley. Plant No. 1 was converted to full secondary and the District needs to process additional secondary sludge and improve efficiency of sludge digestion without building new digesters. The project included Power Building 5, 12 kV switchgear modifications, addition of four new 2,500 kVA transformers, four double-ended 480v MCCs with two automatic transfer bus switching systems for additional reliability, and power, lighting, motor controls & instrumentation, as well as SCADA system upgrading for the 12 digesters.
11. CA OCSD - Digesters Plant 1
CITY OF Sunnyvale

Borregas Interceptor Sewer

LEE + RO performed a condition assessment of an existing corroded 6,000 LF, 33-inch diameter sewer for the City of Sunnyvale. The report recommended replacement of the existing 33-inch diameter sewer with a new 42-inch diameter VCP sewer. The new sewer alignment encountered numerous major utilities crossings, such as a 36-inch diameter natural gas main, a 72-inch storm drain, a 36-inch diameter recycled water main, 12-inch and 8-inch diameter potable water mains, a 6-inch diameter nitrogen gas supply line, a 12-kV electrical power duct, and numerous lateral connections. The alignment also included a jack and bore crossing of a light rail line.
12. CA Sunnyvale - Borregas Sewer
CITY OF Los Angeles

Condition Assessment and Rehabilitation of Four Wastewater Pumping Plants, Bureau of Engineering

As part of the City of Los Angeles Bureau of Engineering’s system-wide wastewater collection system upgrades, LEE + RO has performed condition assessments recommending $6.5 million in rehabilitation work at four pumping plants: (1) the 5,800 gpm Hawaiian PP 677, (2) the 8,000 gpm Wilmington PP 676, (3) the 7,400 gpm Fries PP 666, and (4) the 18,000 gpm San Pedro Pumping Plant 691. The scope included condition assessment of wet wells, piping, structures and electrical systems. Each pumping plant required replacement of dry pit submersible pumps, suction and discharge piping and valves, variable frequency drives (VFDs), emergency generators, and automatic transfer switches.
13. CA City of LA - 4 Pumping Plants
CITY OF Los Angeles

Colorado River Aqueduct Radial Gate Refurbishment, Metropolitan Water District of Southern California

LEE + RO provided field condition assessments, replacement/ refurbishment concept development, preliminary engineering and final design services for eight (8) large hydraulic radial gates along the Colorado River Aqueduct (CRA). The gates had been in operation since the CRA was commissioned in 1941. The inspections revealed various stages of deterioration, corrosion, seal failures, and water leakages. The sizes of the gate openings vary from 11 feet x 14 feet to 22 feet x 12 feet and individual gate sizes are as big as 12.5 feet x 11 feet. Five out of the eight gates are double-leaf type. The objective of this $8 million project was to enhance the CRA’s water supply reliability. The design included extensive structural rehabilitation to accommodate the new gates into the existing structures and replacement of motor operators and electrical and control systems including SCADA systems.
14. CA Colorado River Aqueduct Radial Gate Refurbishment MWDSC

Construction Management

CITY OF Brawley

Construction Management/Construction Inspection Services, Wastewater Treatment Plant Upgrading Project

LEE + RO provided construction management and construction inspection (CM/CI) services for a $24 million wastewater treatment plant upgrading project for the City of Brawley. The project was funded by the Clean Water State Revolving Fund (CWSRF) and a grant from the American Recovery & Reinvestment Act (ARRA) fund. The project replaced most of the existing antiquated facilities. The project included a new Biolac® activated sludge secondary process with three secondary clarifiers for nitrogen removal, complete with UV disinfection, sludge handling facilities, and a new operations building. The sludge handling facilities included gravity thickening, centrifuge dewatering, and a solar greenhouse for sludge drying for Class A Biosolids production. CM tasks included compliance verification and documentation of the CWSRF and ARRA grant conditions and provisions.

1. CM &CI Ser WWTP-Brawely
CITY OF Indio

Construction Management/Construction Inspection Services, Wastewater Treatment Plant Expansion and Upgrading, Valley Sanitary District

LEE + RO provided construction management and construction inspection (CM/CI) services for the $46 million treatment plant upgrading projects that were implemented in two phases. The $26 million Phase 1 project increased the activated sludge plant capacity from 5 to 10 mgd by expanding activated sludge, new aeration blowers, three new 90-foot diameter secondary clarifiers, and added a hypochlorite/bisulfite chlorination & dechlorination system and new chlorine contact tanks, 54-inch diameter outfall, belt-press sludge thickening & dewatering, and drying beds. The $20 million Phase 2 project added two rectangular primary clarifiers, anaerobic digestion with gas management system, odor controls, and administration & laboratory buildings. The projects included extensive electrical system upgrades including two new emergency generators.
2. CM & CI Ser WWTP Indio
CITY OF Los Angeles

Construction Management Services, North Outfall Sewer (NOS) Maze Rehabilitation Project Phase V, Public Works Department

LEE + RO provided construction management (CM) services for the $12.5 million NOS Maze rehabilitation project, which included lining 7,700 LF of 60-inch diameter semi-elliptical and 63-inch and 75-inch diameter concrete sewers; replacing 500 LF of 42-inch diameter semi-elliptical sewer with a 42-inch diameter circular sewer, and replacing 2,400 LF of 8-inch diameter VCP sewer. The project also included sewage flow bypassing during construction, foul air and chemical injection odor control units, removal and disposal of sewer debris, pre- and post- sewer cleaning CCTV and post sewer rehabilitation CCTV video inspections, traffic control, street paving, and public outreach coordination.
3. CM & NOS Los Angeles
CITies OF Torrance and El Segundo

Construction Management/Construction Inspection & Testing Services, Anza Avenue Lateral & Imperial Avenue Lateral Projects, West Basin Municipal Water District & US Army Corps of Engineers

LEE + RO provided construction management, inspection and testing coordination services in addition to community outreach support to the West Basin Municipal Water District and the U.S. Army Corps of Engineers-Los Angeles District (USACOE) for the construction of the Anza Avenue Lateral and Imperial Avenue Lateral. The Anza Avenue Lateral Project included the installation of 14,500 lineal feet of 8-inch diameter, 6-inch diameter, and 4-inch diameter recycled water pipeline, providing recycled water to parks and schools for landscape irrigation applications within the City of Torrance. The Imperial Avenue Lateral Project included the installation of 4,700 lineal feet of 6-inch diameter recycled water pipeline, providing recycled water to parks and greenbelt for landscape irrigation application along Imperial Avenue in the City El Segundo. In addition to inspection and testing services, LEE + RO provided project supervision, quality assurance services, and coordination of construction testing, start-up, and project close-out services, including recommendation for final acceptance, verification of the accuracy of record drawings, and assembly of final warranties, guarantees and operation & maintenance manuals.
4. CM NoPhoto
CITY OF Yorba Linda

Construction Support and Special Inspection Services, Fairmont Booster Pump Station Upgrade, Yorba Linda Water District

LEE + RO provided construction support and special inspection services for all construction elements of the Fairmont Booster Pump Station Upgrade Project for the Yorba Linda Water District (District). The project increased the District’s ability to fully utilize groundwater and import water and improve reliability and efficiency of the water system. The $6 million project included construction of a brand new pump station and demolition of the existing Fairmont Booster Pump Station. Project construction required careful sequencing to maintain uninterrupted service while the new booster pump station was constructed and commissioned and before the existing pump station could be demolished. The project included construction of a reinforced concrete masonry unit (CMU) block structure to house eight (8) electrically driven pumps to handle various pressure zones, a disinfection system; a power/controls facility including emergency power, instrumentation/controls, and SCADA system.
5. CM Fairmont Yorba Linda
CITY OF Indio

Construction Management & Resident Engineering Services, Water Reclamation Plant No. 7 (WRP7) Phase 3 Expansion, Coachella Valley Water District

LEE + RO provided construction management and resident engineering services for a $6 million plant expansion project at the WRP 7 treatment plant facility owned and operated by the Coachella Valley Water District. This project expanded the secondary treatment plant capacity from 2.5 to 5 mgd. The project added activated sludge (aeration) basins, interstage pumps, chlorine contact tanks, a flow equalization basin, a recycled water storage basin, and electrical improvements.
4. CM NoPhoto
CITY OF Laguna Niguel

Construction Management and Construction Inspection Services, Gateway Village Sewer & Water Pipeline Upsizing, Moulton Niguel Water District

LEE + RO provided full-time construction management and inspection services for the Moulton Niguel Water District’s Gateway Village project. The project upsized an existing 8-inch diameter water main to 12-inch diameter, which required the installation of a water high-line bypass during the upsizing and installation of the new 12-inch water main. The project also upsized an existing 10-inch diameter sewer main to 15-inch diameter, which required bypassing of sewage flows during upsizing and installation of the new sewer main. All of the work was performed at night from Sunday through each Friday.
7. CM Gateway Moulton Niguel
CITY OF Palm Desert

Construction Management & Resident Engineering Services, High and Low Pressure Recycled Water Pump Stations, Water Reclamation Plant 10 (WRP 10), Coachella Valley Water District

In addition to preparing a preliminary design report and final design documents, LEE + RO also provided construction management and resident engineering services to the Coachella Valley Water District for two recycled water pumping stations (one high-head and one low-head) as a part of this $11 million Title 22 Water Recycling Plant project. The high head pumping station consisted of five (5) 3,000 gpm capacity pumps (TDH of 400 feet), each driven by 400 hp motor through variable frequency drives. The low-head pumping station included four (4) 3,750 gpm capacity pumps (TDH 230 feet), each driven by 300 hp motor through variable frequency drives. The project included a new electrical substation with 12 kV power distribution loops and two new motor control centers; PLC controls; and one 5 million gallon capacity reservoir.
8. CM & CI Coachella Val WD Palm Desert
CITY OF Irvine

Construction Management/Construction Inspection Services, Zone 6A and Zone B+ Booster Pump Station Improvements, Irvine Ranch Water District

LEE + RO provided construction management and construction inspection (CM/CI) services for two Irvine Ranch Water District pump station improvement projects, the Zone 6A high pressure Booster Pump Station and the Zone B+ Booster Pump Station in the Turtle Rock area of Irvine. The Zone 6A Booster Pump Station capacity was increased from 1,400 gpm to 2,500 gpm by adding a 100 hp pump with a variable frequency drive, plus additional improvements. The Zone B+ reclaimed water system modifications included removal of unused pumps and installation of new variable frequency drives and flow & pressure control regulators along with SCADA system upgrading. The total construction cost was $2 million.
9. CM CI BPS Imp Irvine
CITY OF Long Beach

Construction Management/Construction Inspection Services, Recycled Water Conversion Projects, Water Department, City of Long Beach

LEE + RO provided construction management and construction inspection (CM/CI) services for a recycled water conversion project that included the disconnection of potable water supplies from park irrigation systems and providing new recycled water connections, meters, and related piping. The project included a 6,100 LF, 6-inch diameter ductile iron pipeline constructed in a congested Ocean Boulevard in downtown Long Beach. The project also included testing to prevent cross connection between domestic and recycled water systems.
10. CM & CI Ser San Sew Rehab Long Beach
CITY OF Thermal

Construction Management/Construction Inspection Services, Water Reclamation Plant No. 4 (WRP4) Expansion, Coachella Valley Water District

LEE + RO provided construction management and construction inspection (CM/CI) services for two separate projects at WRP4: (1) the $18 million Phase 4 Plant Expansion Project that increased secondary treatment capacity from 6.9 mgd to 9.9 mgd; and (2) the $4 million Disinfection System Upgrading Project for the expanded 9.9 mgd capacity plant. Project components included a 3 mgd activated sludge plant with gravity belt thickening and belt press sludge dewatering, a 1,250 kW emergency generator, a 9.9 mgd capacity chlorine contact tank, expansion of chlorine and sulfur dioxide storage buildings, addition of chlorinators and sulfonators, and plant-wide electrical distribution system improvements.
4. CM NoPhoto
CITY OF Palm Desert

Construction Management/Construction Inspection Services, Reclamation Plant Expansion Project and Biosolids Thickening and Dewatering Facilities Project, Water Reclamation Plant No. 10, Coachella Valley Water District

LEE + RO provided construction management and construction inspection (CM/CI) services for two major capital improvement projects at Coachella Valley Water District’s 18 mgd Water Reclamation Plant No. 10 in Palm Desert. The first project was an $11 million, 5 mgd Title 22 tertiary treatment and disinfection project that added filters, chlorine contact tanks, a chlorine storage building with a chlorine scrubber, two recycled water pump stations, and a 12 kV power system. The second project was an $18 million biosolids handling facility project that added DAF thickeners, belt presses, an odor control system, and a biosolids truck loading facility.
4. CM NoPhoto
CITY OF Glendale

Construction Management/Construction Inspection Services, Glorietta Wells Chloramination System, Water and Power Department, City of Glendale

LEE + RO provided construction management and construction inspection (CM/CI) services for a $3 million chloramination project at Glendale Water and Power’s Glorietta Well Nos. 3, 4 and 6. The existing Glorietta Park Pump Station was modified to accommodate gas chlorine and anhydrous ammonia disinfection storage and injection facilities, a water softener system, carrier water piping for transfer of chlorine and ammonia, a new injection vault, and a new bridge across Verdugo Wash to support chemical transfer piping from the pump station to the injection vault. The project included the addition of chemical analyzers, transfer pumps and SCADA and electrical and controls upgrades.
13. CM & CI Glendale
CITY OF Long Beach

Construction Management/Construction Inspection Services, Sanitary Sewer Rehabilitation and Replacement Projects

LEE + RO provided construction management and construction inspection (CM/CI) services for a group of sewer rehabilitation and replacement projects located near 10th Street/Lime Ave and 15th Street/Gardenia Ave in the City of Long Beach. The projects included replacement of 270 LF of 8-inch diameter concrete pipe with 10-inch diameter VCP; removal of tree roots from a 10-inch diameter VCP pipe and lining 420 LF of 10-inch diameter concrete pipe with cured-in-place pipe (CIPP) lining; spot repairs on sagging 10-inch diameter VCP sewers; rehabilitation of 5 manholes; replacement of 820 LF of 10-inch diameter concrete pipe with 12-inch diameter VCP; abandonment of 330 LF of 10-inch diameter concrete pipe and a manhole; installation of 165 LF of 12-inch diameter VCP; conversion of 6 sewer laterals from the to-be-abandoned 10-inch diameter concrete pipe to an existing 12-inch diameter VCP sewer; rehabilitation of 315 LF of 8-inch diameter concrete pipe and 660 LF of 10-inch diameter concrete pipe with CIPP lining; and rehabilitation of 11 sewer manholes.
4. CM NoPhoto
CITY OF Ontario

Construction Management/Construction Inspection Services, Backup Power Facilities for Wells 37, 38, 39 & 40, Ontario Municipal Utilities Company (OMUC)

LEE + RO provided construction management and construction inspection (CM/CI) services for the backup power facilities for OMUC’s Well No. 37, 38, 39 and 47. The project included a 1,280 kW mobile generator and modifications to the well sites to enable generator hook ups. The total construction cost was $7 million. LEE + RO also provided submittal reviews and start-up & commissioning services.
15. CM & CI OMUC Ontario
CITY OF Coachella

Construction Management/Construction Inspection Services, Avenue 54 Wastewater Treatment Plant Expansion and Rehabilitation Project, Phase 2

LEE + RO provided construction management and construction inspection (CM/CI) services for a $5.5 million upgrading project at the City of Coachella’s Avenue 54 Wastewater Treatment Plant to increase plant capacity from 3 to 4.5 mgd and to rehabilitate outdated equipment. The project included restoration of two abandoned contact stabilization process tanks, replacement of aeration blowers, and the addition of new concrete-lined sludge drying beds.
4. CM NoPhoto
CITY OF Patterson

Construction Management/Construction Inspection Services, Wastewater Treatment Plant Phase 1 & Phase 2 Expansion/Improvement Projects

LEE + RO provided construction management and construction inspection (CM/CI) services for the City of Patterson’s Wastewater Treatment Plant Phase 1 and Phase 2 Expansion Projects. The $6 million Phase 1 project increased the plant capacity from 0.5 mgd to 1.3 mgd and the $10 million Phase 2 project further increased the capacity from 1.3 mgd to 2.0 mgd with nitrification / denitrification capability. Project components included headworks, oxidation ditch activated sludge nitrogen removal, a centrifuge sludge dewatering facility, trunk sewers, and percolation ponds.
17. CM & CI WWTP Phse 1 & 2 Patterson
CITY OF Carson

Construction Management/Construction Inspection Services, Toyota Filtration System Project, West Basin Municipal Water District

LEE + RO provided construction management and construction inspection (CM/CI) services for a West Basin Municipal Water District filtration facility project that enhances the quality of Title 22 water provided to the Toyota manufacturing facilities in Torrance. The project included packaged filtration equipment, piping and instrumentation, related mechanical and electrical, site security fencing, landscaping, startup testing, and training.
18. CM & CI Toyota WBMWD
CITY OF Laguna Niguel

Construction Management/Construction Inspection Services, Joint Regional Wastewater Treatment Plant Aeration System Upgrade, South Orange County Wastewater Authority (SOCWA)

LEE + RO provided construction management and construction inspection (CM/CI) services for a $4 million secondary process upgrade project at SOCWA’s 12 mgd Joint Regional Treatment Plant in Laguna Niguel. The project included a new blower building; one 450 hp 8,000 cfm Turblex blower; two multi-stage 300 hp 4,400 cfm Hoffman blowers; modification of aeration air piping; replacement of the existing coarse bubble diffusers with Parkson fine bubble aeration panels and associated site civil, electrical, and control system upgrades.
4. CM NoPhoto
CITY OF Carson

Construction Management/Construction Inspection Services, Nitrification Product Water Tank Repair & Rehabilitation Project, West Basin Municipal Water District

LEE + RO provided construction management and construction inspection (CM/CI) services for a water tank repair project for West Basin Municipal Water District at their Carson Regional Water Recycling Plant, which further treats Title 22 recycled water through MF/RO processes to provide nitrified water to customers. This project addressed major coating failure and corrosion damage to two welded steel tanks, each 220,000 gallon capacity (50 feet dia. x 20 feet high), through tank repairs and recoating. A bypass pumping system was installed to continue feeding the BP Refinery with nitrified water during a very tight shutdown time window.
4. CM NoPhoto
CITY OF Thousand Oaks

Construction Management/Construction Inspection Services, Olsen Road Wastewater Pumping Station Sewer & Force Main

LEE + RO provided construction management and construction inspection (CM/CI) services to the City of Thousand Oaks for a $3.5 million project to divert wastewater flow from the abandoned Olsen Road Wastewater Treatment Plant to the City’s Hill Canyon Wastewater Treatment Plant via the City’s trunk sewer system. The project included a high-head lift station, 7,000 LF of 12-inch diameter gravity sewer and 7,000 LF of 8-inch diameter force main. The project also included cured-in-place pipe (CIPP) rehabilitation of sewers.
21. CM & CI Ser Thousand Oaks
CITY OF Pasadena

Construction Inspection Services, Chapman Well Electrical Facilities Upgrades, City of Pasadena Water & Power Department

In addition to providing engineering design and construction phase engineering services, LEE + RO also provided construction inspection services for a well facility upgrades project for Pasadena Water and Power. The well facility was originally constructed in 1967. A new climate controlled building was constructed to house a new 480V switchboard and MCC sections. Existing 350 HP well pump motor and controls were replaced along with a new 500 kVA transformer. The City now has the ability to run the pump across the line or through reduced voltage soft start (RVSS). Other features included relocation of the existing PLC and telemetry equipment, an emergency generator power connection, chlorine feed monitoring, and surge tank control feedback and control.
4. CM NoPhoto
CITY OF Los Angeles

Construction Management Services, Wastewater Treatment Plant Phase I & II Improvements, City of Angels

In addition to providing process analysis, engineering and design services, LEE + RO also provided construction management services for the $4.5 million Phase I and the $6.7 million Phase II City of Angels Wastewater Treatment Plant Expansion and Upgrading projects. Phase I included a new headworks with screenings and grit removal, flow equalization, sequencing batch reactors (SBRs), secondary clarifiers, Title 22 filtration, chlorine contact tank, intermediate and effluent pumping stations, aerobic digestion, and sludge drying beds. The 3 million gallon capacity emergency storage basin was expanded and double-lined with HDPE and leak detection instruments. A Title 22 UV disinfection system for a winter stream discharge was also included. The Phase II Expansion increased the plant capacity to 0.75 mgd.
4. CM NoPhoto