Nottingham Lake Liner Replacement (Benchmark Dam) Avon, Colorado
Replacement of full-reservoir liner, and modifications to high-hazard dam. Man-made reservoir retained by Benchmark Dam was originally constructed in 1980, and lined with a poorly constructed and deteriorating buried 20-mil PVC liner.
K+A, the Prime engineering firm responsible for designs, and engineer of record for construction.
Performed a geotechnical and geologic exploration, seepage loss analyses, slope stability analyses, reverse filter designs for mitigating reservoir sinkholes, modifications to intake structures, and liner system designs.
Performed project engineering, and observation and materials testing during construction.
Prepared reporting and final construction reports and record drawings in accordance with Colorado State Engineer requirements.
Assisted Town of Avon in obtaining 401 and 404 permits, and prepared storm water management plan.