TVWD, Grabhorn Reservoir

The Keller team partnered with Emery and Sons Construction to complete the Grabhorn 5MG Reservoir, Valve House, and Pipelines. The project includes 8-inch to 24-inch ductile iron pipe, HDPE pipe, seismic resiliency provisions, air release and surge relief provisions, and steep slope installations. Project challenges included: extensive permitting and stormwater requirements, rock removal, 40+ foot excavation depths, schedule constraints, construction adjacent to existing residences, and a sensitive stream/vegetative corridor.

This project took home the Honor Award from the ACEC Oregon Engineering Excellence Awards.

Services Provided:

• Reservoir site grading and drainage
• Abandonment of existing vaults, piping, and confined space
• Large diameter water pipeline
• Pipeline construction in roadway
• Structural (valve building), electrical, and instrumentation and controls
• Complex geotechnical investigation and design
• New reservoir
• Innovative design approach