Fish & Wildlife 3 (Napa)
(California Department of Fish and Wildlife, Region 3)
Highland Road Repair Project
NOE - Notice of Exemption
The project is limited to the following activities: removal of the roots of a fallen coast redwood tree within the failed embankment; construction of a steel soldier pile wall with timber lagging and grouted tiebacks approximately 40 feet in length and up to 20 feet in height; excavation of 270 cubic yards (CY) of native material; backfill of 440 tons of structural fill; installation of gabion baskets with slurry fill and 175 square yards of filter fabric on either end of the pile wall, an under drain system, 10-15 tons of half-ton riprap to stabilize the base of the fallen tree, new pavement, new guard rail, and erosion control; and revegetation. Construction equipment will be staged from the existing roadway and pullout areas. The work area is approximately 1,100 square feet. No concrete grout will be placed in the riprap. Concrete grout will be replaced in the holes drilled for the piles. The work will take approximately 60 days and will be completed before Oct. 15. No work will occur below the ordinary high water mark. The CDFW is executing a Lake and Streambed Alteration Agreement No. 1600-2014-0050-R3 pursuant to Section 1602 of the Fish and Game Code.