Proposed Upper Conner Creek Channel Rehabilitation Project (Junction City)

Scoping Notice

The purpose of the notice is to invite interested parties to contribute to the NEPA/CEQA process for the proposed Upper Conner Creek Project by providing comments, suggestions, or concerns about the project during a public scoping period, pursuant to 40 CFR § 1506.6 [1]. To encourage informed participation, this following includes a general description of the Proposed Action and the purpose of and need for the project.


[1] Council on Environmental Quality (CEQ) National Environmental Policy Act Implementation Regulations. 40 CFR Parts 1500–1508 (2020).

Project Summary

Map of Proposed Upper Conner Creek Project Location

Situated one river mile downstream from the Dutch Creek Bridge in Junction City, CA, between river miles 78.5 and 77.1, the Upper Conner Creek Channel Rehabilitation project encompasses both private (65 acres) and public lands (41 acres).  This area includes two previous restoration efforts completed in 2005 and 2006.  Long term monitoring of these locations and adaptive management have led program partners to determine that the lowered surfaces of these early projects were not inundating (providing low floodplain habitat) frequently enough.  Improvements in floodplain connectivity to the mainstem, as well as course sediment additions and large wood features open opportunities for the Trinity River to rework its form to provide long-term channel complexity and high-quality salmonid habitat.  The recreational aspect of this area is also appreciated by many in the area, and project designers have worked to maintain the Junction City Campground river access and community swimming holes.  

The restoration effort will likely be broken into two phases with restoration activities beginning in the spring of 2024.  Construction will involve heavy equipment and will require the use of local roads, including highway 299 and Red Hill Rd, to facilitate river access.  Excess material (i.e. spoils) placement are within the construction area. Materials removed from the floodplain will not require highway trucking, as seen in previous restoration projects. 

  • The design provides a 60% increase in Fry Capacity compared to existing conditions in flows of 450 cubic feed per second (cfs) to 11,000 cfs. 
  • The design provides a 56% increase in Smolt Capacity compared to existing conditions in flows of 450 cfs to 11,000 cfs.
  • The current design balances cut and fill with 141,850 yd3 of cut and 141,850 yd3 of fill.

The figure below shows the proposed Upper Conner Creek project activity areas. 

Draft design for Upper Conner Creek. Prepared by Hoopa Valley Tribal Fisheries and McBain Associates.
Draft design for Upper Conner Creek. Prepared by Hoopa Valley Tribal Fisheries Department and McBain Associates. Click image for additional information.

Upper Conner Creek Project Goals and Objectives

Upper Conner Creek design objectives were separated into three categories: physical, biological, and riparian objectives. In some cases, Upper Conner Creek design objectives were specific to Upper Conner Creek, while others were generic to the entire Lower Valley Design Suite, which also includes Deep Gulch and Sheridan Creek (Yurok Tribal Fisheries Program et al. 2015 2).


2 Yurok Tribal Fisheries Program, Hoopa Valley Tribal Fisheries Department, Bureau of Reclamation, U.S. Fish and Wildlife Service, NOAA Fisheries, and C. R. Agency. 2015. Lower Valley Existing Conditions Report. Prepared for the Trinity River Restoration Program, Weaverville, CA.

Possible Local Disturbances

  • Highway-legal haul trucks would make deliveries of equipment, large wood, plants, and other needed materials during work hours using existing roads. This may cause road delays.
  • Nearby residents may experience noise commensurate with the use of haul trucks and heavy construction equipment, such as bulldozers and excavators.

Proposed Timeline

Public Scoping: December 4, 2023 – December 17, 2023 (COMPLETE)

Draft EA for Public Comment (30 day period): February 2024; dates TBD

Final EA and Decision: February – March 2024; dates TBD

Proposed Phase 1 Implementation: Spring 2024; dates TBD