Highway Department

The Boone County Highway Department is responsible for all roads, bridges, and small structures (less than 20-foot span) within Boone County which are not state highways and which are not within the corporate limits of a city or town. We are also responsible for bridges which have a span of 20 or more feet on all roads in Boone County which are not state highways.

Below you will find information regarding several components of the infrastructure our department maintains.

Road Surface Types and Condition Maps

Since 2015 the Boone County Highway Department has annually inspected and rated every segment of our road system.  This rating system (PASER) has become an industry standard and provides our department important information necessary to develop long range plans for road surface preservation.

The PASER scale is a rating system for road pavement condition developed by the University of Wisconsin-Madison Transportation Information Center and uses visual inspection to evaluate surface conditions.  The maps below include information, including PASER ratings for each of the road segments in our jurisdiction.  Boone County maintains 420 miles of paved roads they are rated on a 1-10 scale and 320 miles of unpaved roads that are rated on a 1-5 scale.

Download a KML File of Boone County Paved Road Inventory (Google Earth Required)

Download a KML File of Boone County Gravel Road Inventory (Google Earth Required)

Bridge Maps

The Boone County Highway Department Maintains 190 bridge structures throughout the County.  A bridge is defined as any structure with a clear span greater than 20’.  The map links below provide basic information on all of the bridges that fall within our jurisdiction.

Download a KML File of Boone County Bridges (Google Earth Required)

Small Structure Maps

The Boone County Highway Department Maintains over 300 small structures throughout the County.  A small structure is defined as any pipe or culvert with a clear opening/span greater than 48” but less than 20’-0”.  The map links below provide basic information on all of the small structures that fall within our jurisdiction.

Download a KML File of Boone County Small Structures (Google Earth Required)

Project Maps

Every year, the Boone County Highway Department plans for several transportation projects across the entire county.  These projects are based on best asset management practices and our long range planning efforts.  The maps below outline the known projects in our current year plan.

Download a KML File of our 2018 Road Preservation Program (Google Earth Required) 

Download a KML File of our 2019 Road Preservation Program (Google Earth Required)

Download a KML File of our 2020 Road Preservation Program (Google Earth Required)