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Wastewater Conveyance System Engineering Services, Bureau of
Engineering, City of
Los Angeles,
ca
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As a Prime Consultant, under an on-call engineering services
contract with a contract value of $3 million, LEE & RO has
been providing conveyance system engineering, design and
consulting services. Representative
engineering assignments include:
(1) Detailed Constructability Review of the $25 million
North Outfall Cured-in-Place Pipe (CIPP) Rehabilitation project
involving 69-inch to 126-inch diameter sewer, siphons, and a
69-inch diameter temporary bypass system;
(2) Preliminary Design Report for the $21 million 4th
Avenue/Slauson
Avenue Sewer CIPP Rehabilitation Project involving 6,400 feet of
75-inch diameter sewer; (3)
Class A Construction Cost Estimate for the $47 million Avenue 45
& Arroyo Drive Relief Sewer construction including jacking and
micro-tunneling; (4) Structural Liner Thickness Benchmarking Study
to develop CIPP liner thickness standards for small diameter sewer
rehabilitation projects; (5) Study and Development of a flow
bypassing plan for the Venice Pumping Plant Sluice Gate
Replacement project; and (5) a value engineering study for the $80
million, 72-inch diameter Vermont Relief Sewer (tunneling).
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Borregas
Interceptor Sewer, City of Sunnyvale, CA
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As Prime
Consultant LEE & RO
evaluated the existing, but corroded 33-inch reinforced concrete
sewer and analyzed alternatives for increasing hydraulic capacity
from 16 to 28 mgd. After study, LEE & RO designed 6,000 feet
of 42-inch VCP. The
new pipeline alignment addressed various utility conflicts, such
as a 36-inch natural gas main, 72-inch storm drain, 36-inch
recycled water main, 12-inch and 8-inch water mains, 6-inch
nitrogen gas supply line, a 12-kV power duct, and numerous small
lateral connections. The
project also included a jack and bore crossing of a light rail.
Significant bypass pumping was required to maintain
continuous sewage flows during the tie-in to the complex network
of sewers at the plant’s headworks. This $4 million project was
constructed in 2006.
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Upland
Interceptor Sewer, Inland Empire Utilities Agency, Chino, CA
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As Prime Consultant, LEE
& RO designed and provided construction phase services for a
$3 million, 7,000 feet long relief sewer system that included
PVC-lined flow control structures and flow metering manhole (Parshall
Flume), and 48-inch, 36-inch, 30-inch, 24-inch and 21-inch VCP
pipes. The design
included two stormwater channel crossings requiring bore and jack
crossings. One is
located south of
4th Street
and the other crosses
G Street east
of
Grove Avenue
. The construction was
completed in 2006.
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| Rehabilitation
of Bitter Point force Main, Orange County Sanitation District,
Fountain Valley
,
CA
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| As prime
Consultant, LEE & RO designed and provided construction phase
engineering services for this $2 million project to rehabilitate
5,000 feet of 36-inch diameter polyethylene-coated Class 50
ductile iron force main, including installation of five pressure
entry manholes and abandonment of 2,000 feet of 24-inch force
main. Rehabilitation
alternatives included Cured-In-Place Pipe lining and swage lining
with high density polyethylene (HDPE) pipe.
After evaluation, the HDPE lining was selected.
Project construction was completed in 2006.
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| 30-inch,
6-Mile Long, Reclaimed Water Transmission Main, Otay Water
District, Spring Valley,
CA
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| As Prime
Consultant, 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 support services for a $17 million, 6-mile
long, 30-inch diameter reclaimed water pipeline from the City of
San Diego South Bay Water Reclamation Plant (Dairy Mart Road) to
the District’s 450-1 Reclaimed Water Reservoir.
The construction employed a wide variety of techniques
including directional drilling to cross Interstate 805,
Otay
River
, and State Route 905. Project
final design was completed in May 2005 and construction was
completed in August 2007.
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| North
City Raw Sludge Pump Station & Pipeline, Centrate, Recycled
Water, Centrate, and landfill Gas Lines, City of San Diego, ca
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As Prime Consultant, LEE & RO provided planning, design, and
construction phase engineering services for four pipelines and a
raw sludge pump station with a total construction cost of $17
million. The project
included 24,400 feet of 36-inch and 48-inch diameter recycled
water pipeline, 21,200 feet of 20-inch centrate pipeline, 21,200
feet of 16-inch pipe for raw sludge, and 14,600 feet of 10-inch
landfill gas pipeline between the City of San Diego’s Clean
Water Program (CWP) two cornerstone facilities - the North City
Water Reclamation Plant (NCWRP) and the Metropolitan Biosolids
Center (MBC), which are four miles apart.
The project also included a 5 mgd raw sludge pump station
with 300 hp pumps and a self cleaning wet well.
Project construction was completed in 2003.
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| Adeline
Interceptor Sewer Relocation Project, East Bay Municipal Utility
District, Oakland, CA
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| The
60-inch Adeline Interceptor Sewer runs under the interchange of
Freeways 580, 880 and 80 and the Union Pacific Railroad tracks at
the eastern terminus of the Oakland Bay Bridge. As Prime
Consultant LEE & RO designed the realignment of the 60-inch
Sewer for Caltrans’ freeway improvement project. Interfering
utilities included natural gas pipes, 12 kV underground ducts, the
Navy’s water lines servicing Treasure Island,
Santa Fe
jet fuel pipes, and numerous communication cables.
This $3 million project realigned 1,500 feet of the sewer
at 20 feet below grade. Extensive
coordination with Caltrans, Union Pacific and various utilities
was required. The design was completed in 2005 and construction
was completed in 2006.
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Spring
Valley Sewer Outfall Bridge Crossing, County
of San Diego, ca |
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As
Prime Consultant, LEE & RO designed and
provided construction support for a 30-inch sewer outfall over the
Spring Valley Creek with two bridge-mounted and one pier-mounted
crossings. This $2
million project design was completed in January 2006 and
construction was completed in June 2007.
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