Categorical Exclusion Determination
Office of NEPA Policy and Compliance
June 19, 2017
Estimated Read Time min
The culvert is a dual pipe installation about 60 lineal feet long. About 24 lineal feet will need to be removed and re-installed in total on both sides of the foot path. The existing separated pipe will be removed, the sub-grade and sub-base rebuilt, the area backfilled, and the surface replanted. Work will occur in the creek and below the normal high water elevation. All the culvert material can be reused and the central sections of the concrete culvert under the foot path can remain undisturbed. large rip-rap will be placed at the down stream outlet to control erosion. Additional, smaller rip-rap will be used at the culver inlet. the open surface area around the inlet and out outlet will be expanded to allow for easy inspection and maintenance. The open area as appropriate will be planted with native grasses.