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DCity of Santa Ana <br />On-Call Stormwater Project Design Services RFP No.: 20-102 <br />City of Los Angeles Laurel Canyon Boulevard <br />re Green Street Design -Build <br />This project received awards from the American <br />Society of Civil Engineers (ASCE) Los Angeles Section, <br />— = ASCE Metropolitan Los Angeles Branch (MLAB), and <br />California Stormwater Quality Association (CASQA). <br />CWE designed and performed construction management <br />for roadway widening, sidewalk improvements, and over <br />2,100 square feet of bioretention systems, 13 dry -wells, <br />along 1,000 linear feet of Laurel Canyon Boulevard for <br />Year Completed: 2017 LA Sanitation — City of Los Angeles and the Los Angeles <br />Conservation Corps. The project provided increased groundwater recharge, reduced flooding <br />impacts, enhanced water quality, protected compatible beneficial uses, and improved the <br />neighborhood quality of life. To accomplish this, CWE designed a series of bioretention swales <br />along Laurel Canyon Boulevard between Kagel Canyon Street and Terra Bella Street with curb, <br />gutter, and sidewalk improvements. This project collects over 100 acre-feet annually of <br />stormwater runoff from a 125-acre drainage area. CWE provided pre-, during, and post - <br />construction support for this project. Contact: Gordon Haines, Environmental Specialist, <br />(213) 485-0585, gordon.haines@lacity.org <br />Alhambra Wash. Eaton Wash. and <br />San Gabriel valley Council of Governments Rio <br />Hondo Load Reduction Strategy Preliminary <br />Engineering and Final Design Services <br />CWE prepared a feasibility assessment and preliminary <br />design plans for three diversion locations within the <br />Rio Hondo -Los Angeles River watershed in compliance <br />with the MS4 Permit requirements. Our contract is in the <br />process of being extended to include final design. The <br />Rio Hondo Load Reduction Strategy (LRS) addresses <br />requirements pertaining to the Los Angeles River <br />Bacteria TMDL. The three diversion areas include <br />Rubio Wash. CWE developed over 12 alternatives for <br />meeting bacteria reduction objectives, which included sewer diversion, advanced treatment <br />(UV/ozone), groundwater injection, and treatment facility options. Advanced treatment using UV <br />was ultimately selected. Tasks included: coordination with the Los Angeles County Sanitation <br />Districts (LACSD) to verify discharge allowed to the sanitary sewers in the area, detailed flow <br />analysis, coordination with the watermaster, site field investigation, topographic survey, utility <br />search to identify existing or planned utility conflicts, geotechnical evaluation to identify soil <br />characteristics and infiltration capacity, permits and easement evaluation, preliminary operations <br />and maintenance, and preparation of a feasibility assessment report and preliminary design <br />plans. CWE staff developed the feasibility assessment, preliminary designs, and Final PS&E to <br />be in compliance with the Safe Clean Water Program and assist the Council in securing coveted <br />grant funding. Contact: Mark Christoffels, Chief Engineer, (626) 962-9292, <br />mchristoffels@sgvcog.org <br />-19- GE25F-141 <br />