Project Overview

The Regional Wastewater Reclamation Department (RWRD) is responsible for sewer improvement efforts throughout Pima County. Pima County is currently rehabilitating/upgrading major facilities representing millions of dollars in investments. Ultimately, these improvements will extend the life cycle of our community's wastewater infrastructure by more than 50 years.

Northwest Outfall Siphon at the Santa Cruz River Rehabilitation

Construction is beginning to replace the existing siphon and inlet and outlet structures located near the 18th hole of the Silverbell Golf Course. This project requires the design and installation of new corrosion-resistant structures with some modifications to the surrounding sewer lines.
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Continental Ranch Regional Pump Station Force Main Augmentation

The Pima County Regional Wastewater Reclamation Department (RWRD) and its Design-Build Team, consisting of Borderland Construction, B&F Contracting, and Westland Resources, will soon begin a project to design and build seven miles of new dual force main sewer in Pima County, northwest Tucson/Marana area.
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Old Nogales Interceptor

This project is designed to increase capacity of the existing Old Nogales Interceptor (ONI) and the Park Avenue Sewer (PAS) in addition to installing new sewer infrastructure to manage the future anticipated flows along the new Aerospace Corridor (ASC) and Hughes Access Road.

Construction on the final phase of the Old Nogales Interceptor project began in January 2021 and is scheduled to be completed in approximately two-years.
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Tucson Boulevard Diversion Structure Replacement - COMPLETED

Pima County Regional Wastewater Reclamation Department (RWRD), and its contractor, Hunter Contracting, replaced the existing diversion structure located within Pima County property at the northern end of Tucson Boulevard, just south of the Rillito River. This project required the design and installation of a new composite diversion structure with modifications to the surrounding sewer lines.
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