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 Washington County Highway Department issues permits for various types of activities or improvements occurring within County Trunk Highway right-of-way.

For questions, to report problems, or to request any of the following documents in a different file format, please call (262)335-5025 or send an email to webhwy@co.washington.wi.us.

Before replacing a culvert, paving an existing driveway, installing a new driveway, or constructing a new road, applicants shall first review the County Access Control Policy then submit a County Access Permit Application Form. For more information on our specifications and permitting process, applicants may utilize the County Access Permit Checklist.
County Access Permit Checklist
County Access Control Policy
County Access Permit Application Form

Before the installation of new or modification to existing utilities within County Trunk Highway right-of-way, applicants shall first review the County Utility Accommodation Policy then submit a County Utility Permit Application Form.
County Utility Accommodation Policy
County Utility Permit Application Form

Before transporting an overweight, overheight, overlength, or overwidth load on any County Trunk Highway, you must first submit a County Oversize Load Permit Application Form. 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, village, or city roads, contact the local municipality. A Certificate of Liability Insurance naming Washington County as certificate holder must accompany the application as well as a $50 application fee.
County Oversize Load Permit Application Form
Certificate of Liability Insurance Sample


Before conducting any work within or modifying the landscape within County Trunk Highway right-of-way, you must first submit a Work Within Right-Of-Way Permit Application Form.
County Work Within Right-of-Way Permit Application Form

If you are organizing a parade or before conducting any other activity that would require a closure (including single-lane) and/or detour from a County Trunk Highway, you must first consult your local municipality (town, village or city) and then submit a County Trunk Highway Detour Permit Application Form after receiving approval an authorized municipal official.

*Please notify the Highway Department of detours on any other roadways (State Highway and town/village/city roads) that could result in increased traffic on County Trunk Highways.
County Trunk Highway Detour Permit Application Form

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 lists below for 2016 County and State road construction projects in Washington County.

Washington County Highway Construction 6-Year Program (TABLE)

Washington County Highway Construction 6-Year Program (MAP)

2016 Washington County Highway Department Projects

     Resurfacing (Scheduled to be completed by June 30, 2016)

     CTH D - from 300' east of Kettle View South, easterly 1.7 miles to
                    concrete west of USH 45
     CTH HH
- from CTH H south 600' and from CTH H northerly to 150'
                      south of STH 28

     CTH I
- from Oak Rd easterly 2.2 miles to CTH M

     CTH U - from west of Turtle Rd northerly to a point 420' north
                    of Illinois Rd

     CTH XX
- from CTH H northerly 3.4 miles to Sheboygan County line

     Alternate Projects

     CTH K - from Indian Dr west 225' to the on/off ramps of I-41 and
     from Indian Dr east 450'

     CTH Q
- from the northbound on/off ramps of I-41 easterly 300'

    Chip Sealing (Scheduled for the week of June 20, 2016)

     CTH M - from STH 60 to CTH F

     CTH Q - from Division Rd to STH 145

     CTH Y - from STH 145 to Mequon Rd

     CTH Y - from CTH Q to STH 175

     CTH Y - STH 175 to park and ride

     STH 83 - from 167 to County Line Rd

2016 Wis DOT Construction Projects In Washington County

     I-41 - paving from USH 45/I-41 split south to Waukesha County line

     STH 175 and STH 167 - roundabout

     STH 175 - reconstruction from Hubertus Rd north to railroad tracks

     STH 145 and Donges Bay Rd - roundabout

     STH 83 - reconstruction from Monroe Ave to STH 60

     STH 33 - ramp improvements to USH 45

     STH 167 - high friction road treatment near Friess Lake Dr

     STH 167 - bridge approach asphalt work over I-41

     STH 83 - chip seal from City of Hartford south to Waukesha County line

     STH 33 - crack fill from City of West Bend to I-41


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.