Current City Construction Projects

City Project Title Project Description Project Status
Old Arcata Road Improvements The project will provide roadway improvements to Old Arcata Road through the community of Bayside, between the Buttermilk Road roundabout and Jacoby Creek Road. The project will improve safety for non-motorized and motorized users, increase the use of active modes of transportation, and rehabilitate deteriorated roadway pavement. 

Additional benefits include enhanced heightened driver awareness of the community, filling an existing gap for non-motorized travel between the Jacoby Creek School and Jacoby Creek Road, and the installation of a new roundabout at the intersection of Old Arcata Road and Jacoby
Creek Road.
Construction delayed due to weather
8th & 9th Streets Improvement Project The City of Arcata has contracted with RAO Construction for the 8th & 9th Streets Improvement Project. Work on 8th & 9th Streets will take place between I Street & K Street and involves: (1) removing and installing new ADA compliant sidewalks and (2) street improvements, which include – crosswalks, intersections, parking, bike lanes, and drainage. Additionally, to further remind, street improvements will include updates on paths of travel and 9th street will be one-way vehicle travel to K Street and 8th Street will be one-way vehicle travel from K Street to F Street.

Portions of the work may require temporary lane closures. Traffic control and flaggers will be in place to help mitigate disruptions in the roadway. Although delays are expected to be minimal, members of the community are encouraged to follow all safety directions and use alternate routes if possible.

If problems are encountered with this project, please contact RAO Construction at 707 443-2118 or the City of Arcata at 707-825-2152.

Updates on construction progress and project plans can be viewed at cityofarcata.org under Building & Engineering Department and within our Featured Projects section, here.


Construction is scheduled to begin on Wednesday, October 11th, weather permitting. 
Work will take place for approximately eleven (11) to twelve (12) weeks.

Construction will take place Monday through Friday from 8 a.m. to 5 p.m.

More information will be provided as it becomes available. The project is scheduled to be completed by January 8th, 2024. 

Isaacson Sustainable Transportation Infrastructure Project The City of Arcata has contracted with R.A.O. Construction for the Issacson Sustainable Transportation Infrastructure (STI) Project. The Issacson STI project is aimed at improving The City’s sidewalks to meet current ADA requirements, improving transportation by adding more bus stops, improving infrastructure by repairing damaged roads, and improving crosswalk safety. Construction is scheduled to begin July 31st , 2023 with the project encompassing multiple locations around Arcata: Arcata Plaza (G St & 8th St), 8th St (between H St & I St), J St & 7th St, H St & 6th St, I St (between 7th St & Samoa Blvd), G St (Rotary Park), and H St (near Arcata Marsh). The project is expected to last 90 working days and have a completion date of November 27th, 2023, weather permitting. Traffic delays are expected to be minimal, however, members of the community are encouraged to follow all safety directions. Construction will take place Monday through Friday from 8am to 5pm. You can view the plans for the project here. Project will begin on July 31st, 2023 and is scheduled to be completed by November 27th, 2023. More information will be provided as it becomes available for more information. For questions or if problems are encountered with this project, please contact the City of Arcata at (707)825-2152.
Phase One of the Arcata Wastewater Treatment Facility Improvement Project  The City of Arcata has contracted with Wahlund Construction, Inc. for Phase One of the Arcata Wastewater Treatment Plant Project. Phase One of the AWTP project will be the City’s largest capital improvement project at an anticipated $54 million in construction costs.

Construction activities include, but are not limited to, a new ultraviolet (UV) disinfection system to replace the current chlorine-based system and reduce associated disinfection byproducts, a new electrical building, upgrades and retrofits to existing facilities, oxidation pond aerators, extensive new sewer piping and electrical duct work, a new pump station to the Enhancement Marshes and a new treated effluent outfall located at the Brackish Marsh.

Funding for this project, a project funded by President Biden’s Bipartisan Infrastructure Law, has been provided in full or in part under the California’s Clean Water State Revolving Fund, which is capitalized through a variety of funding sources, including grants from the United States Environmental Protection Agency and state bond proceeds through an agreement with the State Water Resources Control Board. Additional funding for UV equipment has been provided in part by a HUD Community Development Block Grant (CDBG).

The City has received all environmental permits and approvals for the project and has a multidisciplinary team of consultants and city staff to monitor construction activities and minimize environmental impacts in and around the City’s core wastewater treatment facilities and the publicly accessible enhancement marshes. Sections of the Arcata Marsh & Wildlife Sanctuary may be temporarily closed during pre-construction bird, amphibian, and botanical surveys, during pre-construction vegetation removal, during construction and while conducting post-construction mitigation measures. Please do not remove any staking or flagging found in the project area as it is likely either marking an area cleared by biologist or an area of concern to avoid during construction. Construction activities will be ongoing for a duration of three years, with an anticipated end date in December 2025. 

We thank you for your ongoing support and understanding during the construction period.

More detailed information about the project can be found here.

Phase One of the Arcata Wastewater Treatment Facility Improvement Project has completed our first of three, years of construction.

The City will begin testing our new treated wastewater effluent Outfall 003, located at the Brackish Marsh on South I Street at the crossing of the Bay Trail, starting Friday, December 8, 2023, weather permitting. 

 The Outfall consists of two discharge options, one pipe under the water surface and one above the water surface. Visitors to the Marsh may see water bubbling and movement under the surface of the water, or water may be discharged from the pipe above in the newly constructed outflow area. Treated wastewater cycling through the Arcata Marsh and out to Humboldt Bay provides a myriad of benefits for local wildlife and habitats. 

Construction in the enhancement marshes will continue next Spring.  

Construction activities in the enhancement marshes include, but are not limited to, upgrades and retrofits to existing outlet structures in Hauser Marsh and inlet structures in Allen Marsh, new sewer piping and electrical duct work, a new pump station, submersed baffle walls to enhance treatment and water flow in Gearhart and Allen marshes and a new treated effluent outfall.

Storage Tank-1C Project The City of Arcata has contracted with Mercer Fraser Co. for the Arcata Storage Tank-1C Project. The Tank-1C project is aimed at improving the City of Arcata’s water infrastructure by installing a new one million gallon (1 MG) steel water tank with and an additional 2,300 linear feet (LF) of 10” water main line pipe. Construction is scheduled to begin August 15th, 2022 behind 4200 West End Rd and expected to be completed by September 7th, 2023, weather permitting. Work is expected to last 120 working days with a winter suspension during the rainy season (October 15th – April 15th). Traffic delays are expected to be minimal since majority of work will be done behind 4200 West End Rd and their respective entrances. Despite majority of the work being done is away from the public right away (West End Rd), members of the community are encouraged to follow all safety directions. Construction will take place Monday through Friday from 8am to 5pm.  Mercer Fraser Co is currently on winter suspension until May 3rd, 2023 with an expected completion date of September 7th, 2023. 
Carlson Park Improvements Project Project Description: This project involves site improvements, parking lot construction, road improvements, drainage improvements, recreation facility installation, and playground equipment placement.

Project Location: This project will be occurring at Carlson Park, located at the end of Carlson Park Drive, just north of Giuntoli Lane in northern Arcata, adjacent to the Mad River.

Project Schedule/Duration: This project has a tentative completion date of Spring 2024.

Project Contact: Jak Kirchubel, Engineering Technician I; Office: (707)-825-2174 or via email: jkirchubel@cityofarcata.org

Project Plans: Found here.

In-Progress

General Traffic Impacts: Work will occur Monday through Fridays from 8 am to 5 pm. Work may occur on Saturdays as needed. Access to Carlson Park should be permissible throughout the duration of the project. Road, shoulder, and/or sidewalk closures may occur as needed.

Active/Planned Closure Alerts:
Road closure at the end of Carlson Park Drive is a possibility as part of this project.

Carlson Park Improvements Project Photos/Pictures