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Pressure Reducing Stations Anaheim, CA Sewer Planning & Modeling UNDER ON -CALL" Co CLIENT CONTACT: City of Anaheim, Water Engineering CLIENT CONTACT: 201 South Anaheim Boulevard, Suite 601, Anaheim, CA 928051 Candice Espinoza, Associate Engineer 1714.765.5323 YEAR COMPLETED: 2021 KEY PERSONNEL: Joseph Boyle I Maira Salcedo Krista Kausen I Benjamin Halbach SUBCONSULTANTS: Arcon Psomas was retained through an on -call contract with the City of Anaheim to prepare construction documents for rehabilitation and/or replacement of Pressure Reducing Station (PRS) Nos. 30, 31, 32, and 43 and construction of a new PRS No. 73. The existing PR stations were constructed in the 1960s and have experienced significant corrosion and overall deterioration. Design services included preparation of a preliminary design memorandum to establish the basis of design, and preparation of construction plans, technical specifications and engineer's estimate. In order to conform with the City budget allocated for this project, two bid packages were being prepared: . Bid Package 1 — PRS Nos. 32, 43 and 73 . Bid Package 2 — PRS Nos. 30 and 31 PRS Nos. 30 and 31 are located in underground vaults in busy city streets and involved removal and replacement of all piping, fittings, pressure reducing valves, isolation valves, and all appurtenances within the existing vaults. Nos. 32 and 43 were reconstructed in new locations outside the roadway of existing city streets and involved new vaults, piping, fittings, valves, and related appurtenances. No. 73 is a new facility constructed within an existing parkway and provides an additional connection between the City's 640 and 555 Zones, City of Anaheim 201 South Anaheim Boulevard, Suite 601, Anaheim, CA 92805 1 Keith Linker, Principal Civil Engineer 1714.765.4141 YEAR COMPLETED: Ongoing KEY PERSONNEL: Michael Swan I Kimberly Alexander SUBCONSULTANTS: Arcon Since 2010, Psomas has performed 34 separate sewer studies for the City of Anaheim Public Works Department on three separate competitively procured on -call contracts. These studies are required when developer projects are determined to have the potential to increase sewer flow downstream. Psomas estimates the proposed additional flow and then utilizes the latest hydraulic model of the City's sewer collection system, which Psomas keeps up-to- date to route the flow through the system to a point where it discharges to the Orange County Sanitation District's system. If acceptable depth - to -diameter ratio parameters are exceeded in any downstream facility, recommended improvements are generated and made a condition of development approval.