Diversion Baffle Case History

Location:

City of Boise, Dixie Drain Phosphorous Removal Facility

Project Overview:

The City of Boise and Brown & Caldwell designed a model facility in watershed-based approaches for meeting total maximum daily load limits treating 130 million gallons of daily water by removing phosphorous before entering the Boise River. It is a model for regions facing nutrient removal challenges with budget constraints.

With ABASCO baffles incorporated in the lagoon separation phase and some additional containment requirements, the City of Boise and Brown & Caldwell received the Grand Award by the American Council of Engineering Companies (ACEC) for engineering accomplishments and several regional ACEC awards for the recent project

ABASCO Contribution

Product design, manufacture & installation support

Custom designed flow around baffles
Furling lines included for dredge maintenance
Additional ballast design incorporated to meet high wind projections
Provided custom rigging with winches for line tension and easy maintenance
ABASCO Senior Technician supervised the final installation with assigned contractors

Project Challenges and Features –

Custom designed lagoon baffle for phosphorous reduction from Lower Boise River Watershed
Strong wind projections required extra anchoring and ballast options to meet design specifications
Curtains were designed to facilitate routine dredging maintenance schedule
Cost effective process design demonstrates benefits of lagoon baffles for reduced capital budgets

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