Water: Beaver Falls Project Wins Top Honor

Beaver_valley-special-interest2The Water and Wastewater Digest (WWD) editorial staff has selected the Beaver Falls Municipal Authority (BFMA) Eastvale Water Treatment Plant New Raw Water Intake Project as a 2010 WWD Top Water & Wastewater Projects winner. KLH Engineers, Inc. provided engineering services from the concept to the start up on this innovative water intake structure. The details of the design were featured in the Winter 2009 edition of Clear Concepts.

Congratulations to the BFMA and the KLH engineering team!

Description of Facilities: 10 MGD Water Treatment Plant, 15 water storage tanks, and 350 miles of Water Transmission and Distribution Mains.

Water Treatment Plant Intake
The Beaver Falls Municipal Authority (BFMA) provides potable water to a service population of more than 50,000 people in 22 Beaver County municipalities. The Eastvale Water Treatment Plant (WTP) is the primary drinking water production facility operated by the BFMA. The existing intake structure and Eastvale Dam were built in the early 1900’s had far exceeded its service life expectancy.

The original Eastvale intake facility consisted of the intake gate structure, a garage located above the intake channels, and the pump house. Structural deterioration as well as the orientation of these structures has led to major challenges in maintaining source water flow from the Beaver River. To address these issues BFMA retained KLH Engineers, Inc. to prepare a feasibility study, preliminary design, final design and permitting for a new raw water intake and pumping station.

The facility is an on-river bank-side intake structure extending from the shore line approximately 40 feet. Walls extend from the face of the intake, angling back toward the upstream and downstream shore creating a triangular footprint. The structure’s smooth transition from the upstream shoreline and river bottom to the intake structure face prevents the damming of ice and deflects any large floating debris. The structure is designed with a primary opening facing downstream and oriented so that part of the river flow velocity will naturally sweep the face of the static screens at the intake openings. This geometry acts to deter the accumulation of bed load debris and minimize the impact of suspended debris on the intake screens. The static screens are non-metallic material to deter ice accumulations. Inside the structure, a 10mm dual-flow traveling band water screen is utilized for fine screening purposes. The integrated raw water pumping system for the intake consists of three identical wet-pit submersible pumps sized to individually handle 8 MGD or work together to meet the Authority defined design peak demand of 11 MGD with one pump serving as a standby.

The project required permitting from the Pennsylvania Historical and Museum Commission, the PADEP, the USACE and Norfolk-Southern Railroad.