Highway Department

The Washington County Highway Department is responsible for the maintenance of approximately 515 lane miles of State Trunk Highway under the direction of the State and the maintenance and construction of approximately 390 lane miles of County Trunk Highway. Country Trunk Highways are labeled with letters such as CTH Q or CTH K and State Trunk Highways are labeled with numbers such as STH 164 or STH 33. County Road construction is decided on the basis of need and roads are built with Federal aid if possible with contracts let to the lowest bidder. Maintenance includes crack filling,pothole repair, blacktop patching, picking up trash on the right of way, mowing, tree cutting, shoulder repair, drainage, sign repair, guard rails, putting up snow fence, salting and plowing. Our office hours are Monday through Friday, 7:00 AM to 4:30 PM.

Highway Plans

Searchable Database with Access to Scanned Plans

The Highway Department issues driveway and utility permits for use of County Trunk Highway right-of-way. For culvert replacement, paving a driveway, installing a new driveway, or constructing a new road, applicants shall fill out an access permit application and access permit form. For more information on our specifications and permitting process, applicants can click on the links to the county access checklist and county access control policy at the bottom of this page. For installation of utilities, applicants shall fill out a utility permit form and read the utility accommodation policy. All of the permit forms and applications can be acquired in word format by emailing webhwy@co.washington.wi.us.

County Access Permit Checklist
County Access Control Policy
County Access Permit Application

County Utility Permit Form
County Utility Accommodation Policy

The County Highway Register was an attempt to search out, correlate, and record all known information concerning the laying out of all roads in the county. Some of these books have not been updated since the mid to late 1950's. Read the forward in the index to understand how these books were created.

Washington County makes every effort to keep information on its website accurate and up to date. The information is subject to change without notice. All information is supplied "as is". Washington County does not certify the authenticity or accuracy of any information. No warranties express or implied, are made regarding accuracy, completeness, suitability, legality, reliability or usefulness of any information on this site.

The use of information on this site is solely at your own risk and without the County's liability of any kind. In no event shall Washington County be liable for any damages, whatsoever, whether direct, consequential, incidental, special or any claim for attorney fees or costs, arising out of the use or inability to use the information provided.

Errors and Omissions: This index may contain errors and omissions due to errors in the preparation of the original document or in the indexing of the document.

Images: The images are authentic reproductions of the actual document and the quality is usually good. However, blue or light-colored ink used on original documents will not reproduce well. Older documents may be illegible.

Information is provided as a convenience and is for informational use only. Although Washington County makes every effort to provide complete, accurate, and current information in this application, the County cannot and does not guarantee the accuracy, quality, content or completeness of the included information. Washington County, its officers, employees, agents and assigns make no warranties, expressed or implied, for the contents of this web page. Information provided on this site should NOT be used for legal, survey, engineering, financial, tax or other professional advice. If specific or precise information is required, you should always use the original recorded documents, plats, flood insurance studies, or other official means. Washington County specifically disclaims any liability for damages of any kind resulting from the use, misuse or misrepresentation of any in-formation contained herein and assumes no responsibility for anyone's use of the information. The information included in this application is public record.

  • Massive supports such as telephone poles, heavy metal posts, concrete posts, antique farm equipment, or other similar items are prohibited. Any support must be designed so that if it is struck, it will bend or fall away from the striking vehicle to prevent severe damage to the vehicle or injury to the traveling public. If possible, all newspaper tubes and mailboxes shall be placed on the same post to avoid unnecessary posts.

  • Nothing shall be attached to the mailbox, newspaper tube, or its support.

  • Use of a semi-arch or extended arm-type support which allows snowplows to sweep near or under mailboxes without damaging supports is recommended.

  • When newspaper tubes are used other than those provided by the newspaper, the Highway Commissioner shall have the exclusive authority to approve the newspaper tube.

  • The Washington County Highway Department will repair or replace mailboxes that are physically struck by a county highway department truck.  A standard size and design box will be used. We will not repair mailboxes damaged by snow.

  • Please see Washington County Code, Chapter 12.04

  • Mailboxes should be mounted at a height of 41 to 45 inches from the road surface to the bottom of the mailbox or point of mail entry.

  • Mailboxes should be set back 6 to 8 inches from the front face of the curb or edge of the shoulder to the mailbox door.

The Highway Department provides information to registered land surveyors, property owners, and utilities regarding rights-of-way on county roads in Washington County. Right-of-way is land owned by the county adjacent to County Trunk Highways. To view right-of-way information visit Washington County Mapping Application. For lands on the border of Washington County, click on the links at right for adjacent counties.

No construction activities are allowed on the county right-of-way without an approved permit from the Washington County Highway Department.

No obstacles are allowed on the Washington County right-of-way including used vehicles, for-sale signs, rummage sale signs, political signs, landscaping, and plantings.

County road construction is prioritized on the basis of need, and roads are built with federal aid if possible with contracts let to the lowest bidder. See the table below for 2015 road construction projects. Click here to view the Washington County Highway Construction 6-year program.

2015 Washington County Highway Department Projects

  • CTH N - Reconstruction from Dodge CTY to Airport Dr
  • CTH G & NN & Jackson Dr - Construction of Roundabout


2015 WIS DOT Construction Projects In Washington County

  • STH 175 - Resurface in Village of Richfield
  • STH 167 & 175 - Construction of Roundabout
  • STH 28 - Sealcoat from US41 easterly to US 45



Routine maintenance includes patching pavements, picking up trash, mowing, tree cutting, shoulder repair, drainage, sign repair, guard rails, and maintaining pavement markings delineating travel lanes, bikeways, parking areas and pedestrian crosswalks.

The Washington County Highway Department rountinely removes brush and trees from the highway right-of-way to improve motorist visibility and remove potential roadside obstacles.

The Washington County Highway Department maintains all signs on county and state highways.

The Washington County Highway Department repairs potholes, replaces degraded pavements, repairs bridge decks, and rebuilds small sections of roadways.

The Washington County Highway Department is responsible for snow and ice control on all county, state, and federal highways in Washington County.
Proposed speed limits are determined by a traffic and engineering investigation for the targeted roadway. A recommendation for a speed limit will then be acted on by the Transportation Committee and then the County Board. County Trunk Highways with no posted speed limits have a speed limit of 55 MPH by Wisconsin State Statute.

For speed limits on County Trunk Highways in Washington County, click here.

Click here to view a map showing traffic counts of roads in Washington County. Traffic counts represent the average daily traffic on any given section of roadway. The Wisconsin Department of Transportation publishes a book containing a list of traffic counts with chapters for each county in Wisconsin.

There are no other load restrictions on any County Trunk Highways outside of what is stated in the Wisconsin State Statutes. For vehicle size and weight restrictions on town roads, contact your local municipality.

Allow 3 -5 days for approval of oversize load application. A Certificate of Liability Insurance naming Washington County as certificate holder must accompany application as well as a $50 application fee.

Click here for the oversize load application.

Click here for Certiticate of Insurance Sample