Santiago Canyon Road Bridge IP 556C-0049

Santiago Canyon Road Bridge IP 556C-0049

The California Department of Fish and Game is issuing an Agreement Regarding Proposed Stream or Lake Alteration (SAA# 1600-2006-0368-R5) to the project applicant, County of Orange, RMDM. The applicant proposes to widen the bridge to replace side barriers on Santiago Canyon Road Bridge No. 55C-0049. Work within Santiago Creek would be limited to the placement of new intermediate diaphragms beneath the bridge deck. Equipment access to the creek would be provided via an existing "Arizona" or in-stream type crossing that provides access to a number of small homes on the opposite side of the creek. As an alternative to the dirt construction road access, the contractor will directly access the creek area from above by descending the embankments, and the contractor will hoist equipment and materials from the roadway shoulder over the bridge railing down into the creek area. In the event that flows are present within the creek during this phase of construction, a CMP (corrugated metal pipe) will be placed at the creek bottom to collect flow and release it downstream of the construction. The Operator shall mitigate the 0.07 acre of temporary impact by the eradication 0.14 acre (2:1 compensation to impact ratio) of exotic invasive species at the County of Orange's Santa Ana River Habitat Mitigation Area between Weir Canyon and the Orange County line.

Orange

Unincorporated