WATER & WASTEWATER

RAINBOW BRIDGE WATERLINE REHABILITATION

FOLSOM, CA

Quincy engineers are assisting the City to rehabilitate an existing 18-inch waterline which is suspended beneath the Rainbow Bridge. This water main crosses the American River to serve as an emergency connection to the City’s Historic District. The design included removal and replacement of a portion of the 150 psi high-pressure water main on each end of the bridge. Approximately 450 LF of steel pipeline directly under the bridge will be lined with a high density polyethylene (HDPE) compression-fit liner manufactured by HEBNA. This is the first installation of the compression-fit liner for a high-pressure waterline over a river in the state. A key challenge was coordinating with agencies such as State Parks and Bureau of Reclamation for staging during construction, particularly to reduce impacts to the American River Parkway, a highly-used bike trail.

EAGLE RIVER WASTEWATER TREATMENT FACILITY REHABILITATION ANCHORAGE WATER & WASTEWATER UTILITY DISTRICT

Quincy’s water team provided design services for the rehabilitation of the wastewater treatment facility that was configured as a conventional activated sludge process with tertiary granular media filtration, discharging treated effluent to nearby Eagle River. The facility is nominally rated for 2.5 MGD average daily flow in its previous configuration, and received influent flows of approximately 1.5 MGD average daily flow. Quincy provided design engineering and construction support for replacement of the headworks involving new screeening and grit removal processes; upgrade of an aeration blower to provide energy efficiency; replacement of the existing standby electrical power generation unit; and additional ancillary facility upgrades.

COMBIE PHASE I CANAL REPLACEMENT NEVADA IRRIGATION DISTRICT

Quincy is assisting the District with pre-design, design, and construction of 9,100 LF of 96-inch diameter, low-pressure pipeline. This pipeline will replace the existing open canal and will be constructed within the existing footprint of the Combie Phase 1 Canal. The project is located in Nevada County along the northern side of the Bear River at approximately 1,550 feet in elevation. The original intent was to construct an above-grade steel pipeline supported with ring girder and concrete pier supports at 20 to 40 foot intervals. During pre-design, our engineers evaluated other alternatives and identified above-grade reinforced concrete pipe (RCP) as a preferable pipe material, which was then carried forward into design and construction. This simple change in pipe material resulted in significant construction cost savings for the client.

FORCE MAIN REALIGNMENT PROJECT SANITATION DISTRICT IN NORTHERN CALIFORNIA

The proposed widening and seismic retrofit of an existing bridge necessitated driving new piles very near, or even through an existing 30-inch wastewater force main beneath the harbor. The Sanitation District was concerned that pile driving operations and proposed repairs to the force main would ultimately impair the integrity of the pipeline. Quincy wastewater engineers completed a full feasibility study to realign the 40-year old force main, bringing it above grade, and mounting it on or beside the bridge. Cost estimates for multiple alternatives were evaluated and submitted to the appropriate State agency for funding assistance.

"IT CAN'T BE DONE"

We hear this a lot, and to that, we say "Challenge accepted!" Our team is a think tank of visionary engineers who have designed countless projects despite the odds and claims that it couldn't be done. We pride ourselves on finding innovative solutions.

CONSTRUCTION

Construction can be highly disruptive to residents, businesses and the traveling public. That's why we design projects keeping construction in mind and look at multiple alternatives to minimize impacts to the community. 40% of pipeline projects we design we also manage and inspect through construction.

ENVIRONMENTAL IMPACTS

We are sensitive to the potential impacts projects could have on the environment. From stream crossings to affecting native trees, we work tirelessly to minimize environmental impacts and protect our natural resources.