Replacement of an existing damaged and undersized culvert beneath Goldeneye Drive at Lake Cushman, near Hoodsport, WA. The previous ±54" diameter galvanized CMP culvert had deteriorated causing a sinkhole in the roadway above. This project replaced the culvert with a larger conveyance, increasing the opportunity for fish passage.
• Civil / Survey
• Culvert replaced with 14'-0" x 8'-6" aluminum structural plate pipe arch
• Determined prevailing grade of streambed
• Regraded upstream of culvert to restore historical streambed grade
• Subcontracted Grette Associates for OHW delineation and permit assistance.