Eureka-Arcata Route 101 Corridor Improvement Project News

Project update on KHUM-FM

Project Manager Jeff Pimentel recently checked in with KHUM-FM to provide an update on the Eureka/Arcata Route 101 Corridor Improvement Project.

In the interview Pimentel provides insight on the progress of the Caltrans safety project including details on the proposed interchange at the Indianola Cutoff, a half signal at Airport Road, median closures, acceleration and deceleration lane lengthening, barrier improvements, bridge replacements, rail replacements, and more. Construction is currently anticipated to begin in 2021.

You can listen to the interview here.


Rendering of an interchange at the Indianola Cutoff


Environmental Document complete


Aerial of Indianola intersection

Caltrans has completed a Final Environmental Impact Statement and a Final Environmental Impact Report for the Eureka-Arcata Corridor Improvement Project. These documents can be found here. Caltrans is planning on certifying these documents and approving this project in January 2017. Permits will then need to be obtained and a final design will need to be approved.

Caltrans and the Federal Highways Administration (FHWA) are proposing safety and operational improvements on U.S. Highway 101 between Eureka and Arcata in Humboldt County, including a grade separated interchange at Indianola Road, a half signal at Airport Road, and a bridge replacement. The primary purpose of the proposed project is to improve safety at uncontrolled left turns on and off the highway.

Caltrans Reaches Agreement to Remove 10 More Billboards

In August Caltrans came to an agreement with OUTFRONT Media (formerly CBS Outdoor) to remove 10 billboards along U.S. Highway 101 between Eureka and Arcata by the end of the year.

The negotiations were initiated as part of the development and eventual permitting of the Eureka-Arcata Corridor Improvement project. The agreement also benefited the Humboldt Bay Trail, as some of the billboards conflicted with the location of the proposed trail.

The removal of these 10 billboard will bring the total up to 17 that have been or will be taken down in the area in relation to this project.

More information about the project is available here.



New Project FAQ Page

A new Frequently Asked Questions page has been added to this project news and information blog. Look for the new “FAQ” tab located above. It can also be found here:


Project Manager Talks About Overpass and Trails

Today, Project Manager Richard Mullen appeared on the KHUM Happy Trails radio show and discussed the Eureka-Arcata Route 101 Corridor Improvement Project, the separate US Highway 101 corridor paving project between Eureka and Arcata, and the Humboldt Bay Trail project. To hear the radio interview, please visit:

Conditions for Project Coastal Consistency Outlined

Caltrans received a letter from the Coastal Commission on September 17 which outlined the conditions described during its September 12 meeting in Eureka. In a nine to one vote, the Commission conditionally concurred with the project consistency certification. In the letter, the Commission stated the “…project would not increase highway capacity and was an allowable use for wetland fill as an incidental public service, would not induce growth in a manner inconsistent with the Coastal Act, and, as conditioned, would be the least environmentally damaging feasible alternative and would minimize and provide mitigation for the project’s access, recreation, and visual impacts.”

Here is a list of conditions as presented in the letter to Caltrans:

  1. Coastal Trail Planning. Caltrans agrees that construction of the Route 101 Corridor Improvements will not commence until adequate commitments have been put in place to assure that a separated Class 1 bike and pedestrian trail, parallel to Route 101 between Arcata and the northern end of downtown Eureka, will occur.  Such commitments will include, but not be limited to, assurances that adequate funding for construction of the trail exists, as well as the necessary ownership interests or permissions to enable the trail to be allowed to proceed in a timely manner, prior to or concurrent with construction of the corridor improvements.
  2. Visual Impact Mitigation.  Prior to or concurrent with its submittal to the Commission of a coastal development permit application for the project Caltrans will develop and submit a plan to provide mitigation for the visual impacts of the project by removing, to the maximum extent feasible, all billboards along the corridor, as well as other overhead infrastructure (such as power poles and power lines), and by steepening the inside slopes of the interchange to maximize the view towards the bay from Indianola Cutoff.
  3. Wetland Mitigation.  Prior to or concurrent with its submittal to the Commission of a coastal development permit application for the project Caltrans will:  (1) expand the Samoa restoration concept to include true tidal restoration; (2) provide a biological analysis showing that adequate acreages and/or habitat mixes would, in fact, fully mitigate the project’s impacts; (3) submit and receive Commission approval of coastal development permits for the restoration activities at the two sites; and (4) follow up on Caltrans’ commitment to further substantiate the unavailability and infeasibility of non-agricultural sites in the Humboldt Bay area.
  4. Sea Level Rise PlanningPrior to or concurrent with its submittal to the Commission of a coastal development permit application for the project Caltrans will complete its “Climate Change Adaptation Pilot Strategy for Critically Vulnerable Assets in Northwest California,” and the project described in the permit application to be submitted to the Commission will reflect the findings and implications contained in that study, including any necessary redesign to incorporate appropriate sea level rise-related adaptation strategies.

“Caltrans thanks the California Coastal Commission for their ruling, and looks forward to working with project stakeholders to implement these safety improvements along Humboldt Bay on US Highway 101 between Eureka and Arcata,” said Project Manager Richard Mullen, who will be taking on the duties of former Project Manager Kim Floyd, who successfully steered the project for thirteen years.

Caltrans Reaction to Coastal Consistency Determination

Caltrans is really pleased that the Coastal Commission has found the Eureka-Arcata 101 Corridor Improvement Project to be consistent with the Coastal Act. We would like to thank everyone who attended the Commission meeting, and the many supporters of this vitally important safety improvement project. We are looking forward to working with all of the many stakeholders to design the best project for the entire community. Once we receive a copy of the written conditions from the Coastal Commission, we can chart the best path to completing this much-needed project.