Adjacent existing freeway structures also needed special consideration in order to maintain foundation support for those Caltrans structures.

Site improvements for the pump station included grading, paving, drainage, fencing, lighting, planting and irrigation, and masonry walls.

A-N West was lead consultant for the design and preparation of PS&E for the Rincon Storm System Improvements along Trimble Road in the City of San Jose. The work included installation of 108-inch and 96-inch diameter reinforced concrete storm drainage pipe, junction and weir structures, and sanitary sewer siphons. The project included boring and jacking a portion of the 96-inch diameter pipe under the VTA Light Rail Transit Tracks at the North 1st Street/Trimble Road intersection.

As part of the Route 85/17 Interchange project for the Santa Clara County Traffic Authority, A-N West designed a stormwater pump station with an installed capacity of 350 HP, discharging up to 20,500 gallons per minute.

A-N West designed a stormwater pump station located at end of High Canal at Lucky Drive.  The pump station was designed to provide protection for low-lying areas subject to flooding from upstream runoff during periods of coincidental high tide.  The station was designed to discharge 83,750 gpm using four submersible electrically-driven propeller pumps.  An energy dissipater outlet was designed to minimize scour of downstream Lucky Creek.  We developed the hydrology and storm water flows for approximately 600 acres of tributary watersheds using HEC-1.  We also conducted a HEC-2 backwater analysis to verify upstream flood protection.

Designed approximately 2,500 linear feet of earth levee and masonry flood wall, two stormwater pump stations, automatic tide gate and structure, stand-by generator with building, and improvements of existing drainage system.  Additional work included preparation of hydrology study and quantity/cost estimates.

Designed a 69,000-gpm stormwater pump station, approximately 800 linear feet of 54-inch diameter discharge pipe, dissipator structure, automatic tide gate and structure, and stand-by generator and building.  Additional work included preparation of hydrology study and quantity/cost estimate.

This project concentrated on the 1190-acre Lakeshore Avenue watershed and the 710-acre Grand Avenue watershed, which both drain into the north end of Lake Merritt.  Both watersheds are served by underground storm drain systems built a number of years ago, and the lower reaches of both systems pass through neighborhood business districts.  The project's goals were to study the watershed area and the capacity of Lake Merritt and to recommend system improvements to reduce frequency of flooding during periods of high flow.  Performed field investigations to inventory existing storm drain facilities and to update system mapping, reviewed historical flood events, performed hydraulic calculations to determine each system's capacity with respect to return period, and recommended improvements to reduce frequency of flooding. (Alameda County Public Works Agency).

Conducted a drainage study of a 250-acre watershed, some of which was within the limits of the proposed drainage study in the City of San Pablo. Performed site surveys and visits, hydrologic calculations for the existing storm drainage system, including upstream and downstream facilities within the watershed. Proposed and evaluated improved drainage systems and calculated hydraulic and hydrologic models for the proposed alternatives. Provided preliminary drainage system layouts for the alternative improvements, and prepared preliminary cost estimates of the alternatives.

Prepared technical civil specifications for Rheem Creek improvements from Giant Road to UPPR crossing, in order to improve the creek's drainage capacity in light of proposed development of adjacent property. The plans included creek plan, profiles, and typical creek sections and details. Prepared hydraulic calculations using HEC-HMS for existing and proposed improvement plans.

Conducted a study of 19 Strong Neighborhood Initiative (SNI) areas to determine the adequacy of the existing storm drain facilities to convey the 10-year storm event. This involved the evaluation of the outlet control conditions at the major creeks and streams which ultimately carry storm flows to San Francisco Bay. Analyzed these downstream control conditions to establish the capacity of the tributary storm drain networks within each SNI, then determined the improvements and related costs needed - including gravity pipes, force mains, and pump stations - to meet the 10-year criteria. Based on the results of these key 19 SNI areas, estimated the overall construction cost to bring the entire city into conformance with the 10-year flood protection criteria, and recommended various means of funding this long-range program for the City's budgetary planning process.