DESCRIPTION
The proposed project will result in a preliminary design of a salmon habitat restoration project that will focus on restoring RM 0-1.7 on the mainstem of Snow Creek. The channel throughout this reach is severely entrenched and degraded, with evidence of incision of ~4-5 feet throughout the reach.
A needs assessment and alternatives analysis was completed, considering complementary components which were identified as necessary for integration into a strategic restoration strategy for the Lower Snow and Salmon Creek Watershed, including the estuary into Discovery Bay. Alternatives were assessed for monitoring of salmon and steelhead to allow for continuation of a comprehensive program in the watershed as documented in the West Fork Environmental report attached. Alternatives were assessed for creek restoration actions involving a realignment of Snow Creek to reconnect to Salmon Creek similar to their historical configuration as well as alternatives for road realignment for the US Highway 101 corridor to allow for unrestricted flow of a restored stream system. Natural Systems Design (NSD) prepared a report to provide qualitative and quantitative data and assessment results that summarize the findings that might be considered to achieve the goals of restoring the lower watershed and estuary. The NSD report includes evaluation of previous studies and literature on the project area, field reconnaissance, hydraulic modeling, geomorphic analysis, and habitat assessment to inform understanding of existing conditions and potential benefits of various alternatives.
Parcel numbers were identified for current hazard risks, potential impacts from restoration alternatives, and potential impacts to highway realignment alternatives. This listing can be found in Appendix C of the NSD report.