Hogback Lake Diversion Dam
Overview
In May 2023, Advanced Geotechnical Solutions, Inc. conducted subsurface exploration and geotechnical engineering at the Hogback Lake Diversion Dam southeast of Rawlins, Wyoming. The goal was to evaluate the stability of the existing dam and diversion channel as part of a broader floodplain study.
The subsurface exploration included five soil borings. Laboratory testing followed, including moisture content, sieve analysis, atterberg limits, direct and triaxial shear tests, consolidation, and crumb tests. Results indicated that the existing diversion channel was unstable due to steep slope geometry and ongoing erosion.
AGS recommended two main approaches for slope stabilization: cutting the existing slopes to shallower angles or constructing retaining walls where space or constraints limit grading. To mitigate erosion, protective measures such as imported riprap, precast concrete mats, or fabric-formed concrete blankets were advised.
Detail
