East Valley Water District's City Creek Crossing Sewerline Protection Project

East Valley Water District's City Creek Crossing Sewerline Protection Project

California Department of Fish and Game is executing a Lake and Streambed Alteration Agreement (SAA#6-2002-25) pursuant to Section 1601 of the Fish and Game Code to the project applicant, East Valley Water District. The applicant proposes to excavate an approximate 30-foot-wide by 12- to 15-foot-deep trench around the existing sewer pipeline that crosses beneath the creek. Once exposed, the pipe will be encased in a minimum of 4-foot-wide by 4-fot-deep concrete encasement in order to reinforce the clay pipe. To protect the pipe from potential scour of the channel, a rock concrete rip-rap cradle will be placed over the encasement; the cradle will be about 2 feet thick and extend outward and downward from the encasement at about a 1.5:1 slope to a minimum depth of about 12 feet below the channel flowline. Side slopes of the trench for the rip-rap cradle will be constructed at about 1:1 slope. This will result in about a 50-foot-wide by a minimum 12-foot-deep trench. To construct these facilities, a 20-foot-wide construction access road will be developed adjacent to the trench, as described in the submitted application. Installation of the pipe facilities will impact approximately 0.80 acre of streambed.

Highland

San Bernardino