Water/Wastewater Facilities

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Project Title / Client

LAAFP UV Facilities & LAR UV Facilities/LADWP

These two UV facilities provide an advanced level of protection to the LADWP's treatment process, complying with new water quality regulations established by the U.S. Environmental Protection Agency (EPA). The facilities each have 14 UV reactors, each with a maximum flow of 60 MGD and will provide protection against microbial contaminants that exist naturally in surface water sources and will reduce the use of chemical treatments, such as ozone and chlorine. IEM prepared construction schedules and cost estimates during the 60% and 90% design phases. IEM also provided scheduling services during construction of the LAAFP project.


River Supply Conduit Projects/LADWP

The first phase of the RSC project consists of installing 3,900 linear feet of 78-inch welded steel pipeline from the North Hollywood Pump Station to the intersection of Lankershim Boulevard and Colfax Avenue. The second phase consists of installing 11,800 feet of the same 78-inch welded steel pipeline from the intersection of Lankershim Boulevard and Colfax Avenue to Whitnall Highway at Burbank Boulevard. The pipeline alignment runs through several congested major streets in Los Angeles. Both phases of this project employ tunneling and open cut trenching construction methods. IEM was responsible for coordinating with various governing agencies to secure all the required construction permits on behalf of the LADWP.


2 Compressed Natural Gas Facility/LADWP

This project adds new fast-fill unattended Compressed Natural Gas (CNG) fueling facilities at LADWP Western Water District Yard and Western Water District Yard. Once completed, these facilities will provide fueling stations for LADWP's 430 CNG-fueled vehicles. Each facility includes two compressors with option for expansion, one dryer (with on-site regeneration), ground storage, four fast-fill hoses, a fuel management system and an emergency standby power source (diesel generator). Each station will also have lighting and canopies over fueling islands and ground storage vessels. IEM prepared probable engineer cost estimates and construction schedules at 30%, 60%, 90%, and 100% design phases.


Elysian Reservoir Floating Cover Replacement Project/LADWP

This project consists of adding floating cover on LADWP Elysian Reservoir (250,000 s.f.). Elysian Reservoir is 33-million gallon reservoir near the Pasadena Freeway in Elysian Park supplies drinking water to about 375,000 people in downtown and eastern Los Angeles. Covering the reservoir protects the water from contaminants in the air and rain runoff and inhibits the growth of algae. Because of concern that vandals in the heavily used Elysian Park could more easily damage a floating cover, the DWP has opted for a more expensive aluminum cover on the Elysian Reservoir. IEM prepared engineer' probable construction cost estimates and construction schedules at 30%, 60%, and 90% design phases.


Eagle Rock Reservoir Floating Cover Replacement/LADWP

This project consists of adding floating cover on LADWP Eagle Rock Reservoir (315,000 S.F.). Eagle Rock reservoir is a 83-million gallon potable water storage reservoir. Although water that passes through Eagle Rock Reservoir is considered safe, LADWP plans to cover the reservoir as part of a citywide program to meet stricter water quality standards of the state Department of Health Services. Covering the reservoir protects the water from contaminants in the air and rain runoff and inhibits the growth of algae. IEM prepared engineer's probable construction cost estimates and construction schedules at 30%, 60%, and 90% design phases.


Lake Skinner Oxidation Retrofit Program/MWD

IEM provided inspection and document control services for this $190 million Oxidation Retrofit Program (ORP) which included the following new major facilities: Six ozone contactors and one ozone generation building that houses five 4,000-lb/day ozone generator; Three 37,000-gallon liquid oxygen (LOX) storage tanks and feed equipment; 630-mgd plant influent structure; Three chemical storage and feed systems (sulfuric acid, hydrogen peroxide, and caustic soda) to control pH, taste, and odor; New power substation and electrical switchgear building; 60-mgd coal removal system; 34-mgd washwater clarification system; 60-mgd washwater return pump station; Interconnecting pipelines with diameters ranging from 5 to 12 feet


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