Water Quality Certification Public Notices

Water Quality Certification Actions - Applicants for federal permits that involve dredge or fill activities in surface waters (including wetlands) are required to obtain certification from the state verifying that the activity will comply with state water quality standards. Most of these federal permits are referred to as 404 permits (in reference to Section 404 of the federal Clean Water Act). Applicants for some other types of federal license or permits (ex. FERC licenses) that authorize activities that may result in discharges to waters of the United States are also required to obtain state certification. This state certification is called 401 Certification (in reference to Section 401 of the Clean Water Act). In California, 401 certification actions are the responsibility of the State and Regional Water Quality Control Boards. It is the policy of this Regional Board to provide public notice of pending 401 Certification actions in order to gather comments from concerned agencies and the public. The following list contains notification of pending 401 Certification actions.

 Project Name WDID County  Location Description Comment period Contact Info
Mendocino County RCD & Pacific Watershed Associates - Big River Riparian Restoration Project 1B22060WNME Mendocino 39.30392° N, 139.30392° W The Big River Riparian Roads Restoration Project will reduce sediment delivery to the Big River basin and to achieve the goals of the Big River TMDL through road upgrades (stormproof) within the mainstem Big River, on land owned and managed by California Department of Parks and Recreation. Work is proposed to occur between July 18 and October 31, 2022.
Treatments with stream encroachments include eight features, those being: 1) the replacement of four undersized culverts at Class II stream crossings, 2) improving road drainage at an existing well-functioning culverted stream crossing, 3) installing one armored fill crossing at a small Class III stream crossing, and 4) excavating unstable road fill material with the potential for sediment delivery to the Big River, which will involve placing four existing larger second-growth trees that are in the excavation area as channel habitat improvement structures on Big River banks along the M-1 Road in Mendocino Headlands State Park Big River Unit.
Four Class II, non-fish bearing stream crossings have been determined to require culvert replacement. The existing culverts will be replaced with new culverts sized to convey 100-year flood flow and transported stream debris. One of these culverted stream crossings will have a single-post trash rack installed to prevent culvert plugging from debris transport. One culverted stream crossing will be improved by eliminating hydrologic connectivity from the adjacent road and inboard ditch. One stream crossing with no crossing infrastructure (fill crossing) will be upgraded to a robust armored fill crossing. At two locations, unstable road fillslopes will be removed by mechanical excavation to prevent delivery of coarse- and fine-grained sediment to the adjacent Big River. At those two fill removal locations, two larger second-growth conifer trees growing on the failing fill/hillslopes will be removed at each feature and allowed to fall in the stream channel to improve bank-based instream habitat conditions for aquatic species, rather than increasing land disturbance by removing the logs from the steep streamside hillslopes.
A location on lower Dry Dock Gulch just upstream from the M-1 Road has been identified as a temporary point of diversion for obtaining drafted water for conditioning stream crossing fill material, as well as for obtaining proper compaction for each road drainage improvement feature being constructed in order to protect water quality. Road drainage treatments will utilize road shaping, rolling dips, and installation of ditch relief culverts to hydrologically disconnect road surfaces from stream crossing locations.
All crossing construction will be implemented according to the recommendations developed from the “Road Related Sediment Source Assessment – Mendocino Coast TMDL Implementation Program," utilizing standards specified in the “Handbook for Forest, Ranch, and Rural Roads”, (Weaver et al., 2015), and the California Salmonid Stream Habitat Manual, Part X (Weaver et al., 2006), which describe progressive Best Management Practice treatments for road related sediment reduction evaluation and design. All work in watercourses will be performed during low flow periods between July 18 and October 31. Care will be taken not to unnecessarily disturb native channel. Fill to be permanently removed will be stored in designated locations with no risk of sediment delivery. All disturbed areas with potential for sediment delivery from surface erosion processes will be seeded and mulched with species and materials approved by State Parks. All stream crossings with active flow at the time of implementation will have their water diverted around the work site and work will only take place in the dewatered channel area.
May 16 through June 4 Jake Shannon jacob.shannon@waterboards.ca.gov 707-576-2673
Blue Creek Salmon Sanctuary Culvert Restoration Project 1B22032WNHU Humboldt/Del Norte 41.4648° N, 123.9015° W to 41.4200° N, 123.8300° W This Project would remove 16 existing undersized and poorly functioning watercourse crossings and replace them with culverts and crossings sized and designed to accommodate 100-year flood flows with debris and sediment loads. Total permanent impacts to stream channel habitat would be 120 linear feet (0.05 acres). Temporary impacts would total 900 linear feet (0.05 acres) to stream channel and 1,010 linear feet (0.23 acres) to riparian habitat. Benefits from properly sized and aligned culverts would offset permanent impacts. Passive restoration and supplemental plantings would address temporary impacts to riparian areas. Construction is planned to total 120 days with a proposed start date of June 15, 2022. May 6, 2022 to May 26, 2022 Shannon Strong shannon.strong@waterboards.ca.gov 707-576-2499
Humboldt Redwoods State Park Watershed Restoration Program 1B22061WNHU Humboldt 40.3215° N, 123.9829° W The Project will progressively restore and rehabilitate Humboldt Redwood State Park (HRSP) watersheds in phases over a 30-year implementation period. The sequencing and schedule are based on the Bull Creek Watershed Rehabilitation Plan but includes all other watershed areas within HRSP as well. The watershed restoration actions will include stream restoration, cannabis grow site cleanup, and stream crossing removal. This Project is being undertaken as a voluntary restoration. The impacts associated with the Project are temporary in nature and, once complete, the Project will provide a net benefit to water quality; therefore, no compensatory mitigation is required. May 4, 2022 to June 17, 2022
Jake Shannon jacob.shannon@waterboards.ca.gov 707-576-2673
California Department of Transportation
CDOT Highway 36 PM 11.4 - 34.5 Bridge Replacement Project - 3 Bridges (01-0C500)

PM 25.27

PM 34.52
To meet current design standards, Caltrans proposes to widen Little Larabee Creek Bridge (PM 25.27) and replace Hely Creek Bridge (PM 11.46) and Butte Creek Bridge (PM 34.52) on SR-36. Waters will be protected during and after construction a with temporary creek diversions, debris containment systems. BMPs installed prior to construction work, and post-construction storm water BMPs. Approximate temporary impacts will be, 967 linear feet (LF) to streams, and 0.584 acres to riparian areas. Approximate permanent impacts will be 0.018 acres to wetlands, 79 linear feet (LF) to streams, and 0.097 acres to riparian areas. Permanent impacts will be offset through waters enhancement, replanting, and offsite mitigation. Caltrans proposes to purchase a fen parcel to fully mitigate the wetland impacts, and to offset 291 LF of stream impacts by upsizing culverts and installing large woody debris to benefit stream systems. A revegetation plan will address any additional permanent and temporary impacts to waters and riparian areas. Construction is planned over 4-years from 2022 through 2025 with 5 additional years for revegetation. May 2, 2022
May 22, 2022
Susan Stewart

California Department of Transportation
CDOT Highway 299 PM 30.7 & 33.35 Curve Improvement Project (01-0J410)




The project will enhance safety and reduce collisions by improving curves through shoulder widening, rumble strips, guardrail upgrades, and improved markings. To accommodate road widening, five retaining walls will be constructed at three locations. Modifications to 8 culverts and construction of 5 new culverts are proposed, plus removal of 6 overside drains, and installation of three traction sand traps. Rock slope protection (RSP) placed at the outlet of culverts will resolve or prevent erosion issues. Streams will be dewatered as needed and offsets for jurisdictional impacts include wetland creation and planting riparian vegetation. Approximate temporary impacts will be 0.025 acres to wetlands, 586 linear feet (LF) to streams, and 0.109 acres to riparian areas. Approximate permanent impacts will be 0.048 acres to wetlands, and 0.048 acres to riparian areas. Construction is planned over 455 days from January 2023, to October 2024.

April 29, 2022
May 19, 2022

Gil Falcone
(707) 576-2830