AC was contracted by GeoEngineers and Clackamas County Water Environment Services (WES) to remove a concrete weir structure that spanned Deep Creek. The concrete structure functioned as a dam, impounding flow and resulting in a fish passage barrier to resident and ESA-listed anadromous fish alike. Based on the presence of ESA listed fish species in Deep Creek, removal of this passage barrier was considered a priority to ODFW and the Clackamas River Basin Council.