Marsh Trail Improvements Project (Notification of Lake or Streambed Alteration, No. EPIMS-SON-58331-R3)

The Marsh Trail Improvements Project, executed under Lake and Streambed Alteration Agreement EPIMS Notification No. EPIMS-SON-58331-R3, is a collaboration between the California Department of Fish and Wildlife and the California Department of Parks and Recreation. Located in an unincorporated area of Sonoma County at coordinates 38.40848, -122.59671, the project focuses on infrastructure upgrades to existing access roads. The scope of work includes the installation of two 20-foot-long galvanized steel pipe culverts, one 36-inch and one 18-inch in diameter, to replace existing wet crossings in two unnamed tributaries of Sonoma Creek. Additionally, the project involves replacing a 20-foot by 12-foot wooden crossing over Schultz Creek with a prefabricated steel bridge of the same dimensions. To minimize environmental impact, the project is designed to avoid tree removal and permanent riparian habitat damage, with only 10 square feet of temporary impact that will be restored on-site. All work is subject to strict environmental constraints, requiring that culvert installation occurs only when tributaries are dry and bridge work over Schultz Creek is conducted outside of flowing water. The project is classified as a forecast under NAICS code 237310 and has been granted a statutory and categorical exemption under Class 3, CCR Title 14, section 15303, due to its limited scope and modification of existing structures. Primary points of contact include James Hansen of the California Department of Fish and Wildlife and Trish Shute of the California Department of Parks and Recreation.