Long Park Dam Remediation Project
Daggett County, UT
Lead-mounted downhole hammer installs cut-off wall on steep slope of dam abutment.
The secant pile method was utilized for construction of a seepage cutoff wall in fractured rock beneath a dam in a remote and high altitude location in Utah. Hard rock formations and a 23° sloping work surface created a unique challenge for installation of 28,000 sf. of wall to depths of 60’. A 20” diameter downhole hammer, drilling overlapping holes, aided by a unique control and monitoring systems, produced a continuous 8” thick concrete wall.
Owner: Sheep Creek Irrigation Authority
Consultant: URS Greiner Woodward Clyde
Contractor: Empire Sand & Gravel, Billings, MT
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Case Foundation Company
1325 West Lake Street
Roselle, Illinois 60172