Project Location
Pasco,
WA
Client
City of Pasco
Market Sector
Project Type
- Utilities & Infrastructure
Services Provided
Project Highlights
- Designed the replacement of a failed 48-inch storm main within a U.S. Army Corps of Engineers (USACE) easement near the Columbia River.
- Provided permitting support, including Section 106, USACE 404/401, and HPA, plus coordination with multiple regulatory agencies.
- Delivered full-service support for stormwater design, survey, permitting, and construction documentation for two projects.
Project Description
MacKay Sposito provided engineering design and permitting services for two vital stormwater infrastructure projects in Pasco, Washington, identified in the city’s 2023 Comprehensive Stormwater Management Plan. These efforts address aging and failing storm systems impacting residential areas and public parkland. The Sylvester Street Stormwater Pipe Repair project involves replacing severely damaged 12-inch, 15-inch, and 21-inch storm pipes and manholes along a busy five-block stretch of this corridor. The project also impacts a very old cast iron water pipe; the project includes the replacement of the water main. Due to the corridor’s high usage, traffic management, construction staging to maintain water service to residences, and working around existing utilities are key components of this effort.
The second project focuses on replacing a deteriorated 48-inch storm main in a USACE easement at Schlagel Park. This scope includes pipe replacement, environmental permitting, coordination with USACE and other agencies, and restoring impacted park land. With a strong local presence and prior experience at Schlagel Park, MacKay Sposito completed the permitting effort under budget and on time. This project included the preparation of a detailed construction sequencing plan and design of a conveyance bypass system.