Jefferson Parish Department of Public Works

Metairie, LA 

The purpose of this project is to minimize recurring street flooding in the area along the west bank of the 17th Street Canal between Lake Pontchartrain and the north side of Interstate 10 (I-10).  ECM performed hydraulic and hydrologic analysis, engineering design services for these two new drainage pump stations (Veterans North, and Veterans South) that discharge into the 17th Street Canal. The maximum pumping capacity for these pump stations is 60 CFS and 85 CFS respectively. 

Included in the $18 million design of these pump stations are concrete wet well with intake basin and debris collection screen, multiple axial flow pumps and piping system with force mains that discharge into the 17th Street Canal. Work includes layout of the pump stations and geometrics of the suction chamber based on pumps and hydraulic institution standards; design of concrete pump station structure on timber piles, trash screens, suction and discharge piping, timber pile supported generator foundation, etc.  The pump stations will have fiber optics lines, control systems with automatic operations, sequencing, integrated level control systems, and remote monitoring with SCADA.  Work also includes upgrading the existing gravity drainage system to divert flows from the drainage basin to the new pump stations. 

ECM is also responsible for 408 permitting.  As a part of the permit for USACE, ECM conducted a full hydraulic evaluation of the canal system under various scenarios to study the impact of these pump stations on the canal safe water evaluation. The evaluation included developing system hydrographs for each pump station and routing them through the canal using a HEC-RAS model. This project is under review by USACE for permit.