Welcome to the official website of
Highway District No. 4
Our Purpose and Organization
Highway District No. 4 (CHD4) is one of four Highway Districts in Canyon County. Our Highway District boundaries primarily include the Northeastern area of Canyon County, surrounding Caldwell and Middleton. Highway District No. 4 was formed in 1981 to maintain public rights-of-way, roads, and bridges in the highway system, within the District's boundaries, excluding state highways and public streets within city limits.
The Highway District is a political subdivision of the State of Idaho and, according to state law, functions like a corporation. It is a special-purpose district and is not part of the state, city or county governments.
Total Miles in District:
326.41
Improved Miles:
323.62
Gravel Miles:
2.79
Current HD4 News
INTERSECTION PROJECTS DELAYED
HD4 is postponing work on roundabout projects at two intersections due to delays in obtaining federal permits for work involving canals. The Middleton & Linden intersection will be re-opened to traffic as an all-way stop until Winter 2026 when work to relocate the Caldwell Highline Canal can resume. The Farmway & Ustick roundabout project will also be postponed until 2026 as a permit needed to relocate the Phyllis Canal could not be obtained in time to complete work this winter. Click HERE for additional information on these projects.
Move What Matters!
Take a 5-minute survey to help COMPASS prioritize transportation investments that support the type of future you want to see. Take the survey at compassidaho.org by April 3, 2025.
See their Survey Flyer for more information.
Effective August 22, 2022
HD4 began collecting development impact fees for the Mid-Star Service Area with all access permits issued for new residential, commercial, or industrial development. This includes the unincorporated areas around Middleton and Star lying north of the Boise River, and a small area north of Lincoln Road within one mile from Middleton Road.
See our Transportation Impact Fee webpage for more information.
HD4 Employment Opportunities
Highway District No. 4 (HD4) is seeking qualified applicants to complement the Road Crew and Engineering Department in planning, design, and construction of transportation projects, and assist with development entitlements.
For immediate consideration, submit an application, resume, and any supplementary materials to [email protected] (include “HD4 Job” in the subject line), or by US mail.
Job Application (Required for all positions)
Current Job Openings:
Truck Driver
Operate trucks used in road, pipe, and bridge maintenance. Knowledge of snow removal equipment (snow plows, sanding, liquid applicators). Works with road, bridge, and herbicide crews or as assigned.
Salary Range: $28.31 - $40.06 /hr