California Department of Transportation

Project Development Workflow Tasks (PDWT)

Part 3 - Identify Project Need and Project Initiation Document

II. Project Initiation Document

B. Develop Initial Alternatives (150.10) - Develop Concept Alternatives (WBS 150.10.15)

P59. Request Pumping Plant Recommendation

Pumping plants are needed when storm water cannot be drained from the roadway by gravity flow. This situation occurs typically with highway sections that are depressed below the surrounding ground. During the PID phase, the project engineer requests preliminary pumping plant recommendations and cost estimate from the District Hydraulics Engineer with input from the DES Office of Electrical, Mechanical, Water and Wastewater Engineering (EMWW). The District Hydraulics Engineer will assess the proposed project’s need for a pumping plant and other possible options that may be considered to avoid the need for a pumping plant. The EMWW is responsible for the design of pumping plants. The project engineer may also consult with the DES Project Coordination Engineer (PCE) for general guidance.

Pumping plants are initially costly ($250,000 and up), and have indefinite lifetime maintenance costs. The project engineer should carefully consider the Hydraulics Engineer’s recommendations during the development of project alternatives, particularly if options exist that would avoid the need for pumping plants. During the PA&ED phase of the project, the District Hydraulics Engineer must conduct additional studies towards providing supporting data (tributary areas, hydraulic grade lines, collection and outfall facilities) to the DES. During the design phase, the District Hydraulics Engineer will provide the supporting data to the DES for the preparation of the pumping plant PS&E. The topic of Pumping Plants, and the rolls of the District and DES, is covered in Chapter 830, Topic 839 of the Highway Design Manual.


HDM, (Topic 839, “Pumping Plants”)


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This page last updated October 20, 2010