Asphalt Overlay & Concrete Replacement Program

Asphalt Overlay Program

Overlay

The overlay process consists of rotomilling (grinding off) 2 inches of existing failing surface and then placing a new 2 inch layer of asphalt. In most cases, patching is required to repair damaged areas before the placement of asphalt overlay. Road and Bridge maintains approximately 2,900 lane-miles of asphalt roadway. We determined that it takes at least 190 lane-miles of overlay each year to prevent overall deterioration of the road network. We currently do less than 100 lane-miles per year.  

Notifying Residents

Notification flyers are posted on doors advising residents of upcoming concrete and paving operations. Residents are given as much notice as possible, typically between 12 to 48 hours to move vehicles off the roads. If residents do not comply, vehicles will be towed to a nearby location.

Clean-Up

At the completion of asphalt overlay, sidewalks and roads are swept.  

Concrete/Sidewalk Replacement Process

Replacement

Concrete replacement is selected in accordance with the Asphalt Replacement Program. Road & Bridge bases the decision to replace concrete on using the Concrete Criteria Rating system. The ratings are on a scale of a one (1) to four (4), with one (1) being a condition of minimal defects and a four (4) being the worst condition. The Concrete Criteria Rating system is designed to evaluate existing concrete conditions and prioritize concrete replacement. The concrete conditions are determined by various characteristics such as vertical separation, ponding, fracture, spalling gouging and missing concrete.

ADA Accessible Curb Ramps

All non-compliant ramps must eventually be replaced. There are thousands of these ramps in the county and an inventory of their status and location is currently being conducted. Funding does not exist to replace all non-compliant ramps at once. Ramp replacements occur only when they fall within the scope of an asphalt overlay, reconstruction project or extensive concrete repairs in a localized area.

Replacement Markings

Using the Concrete Rating System, concrete is marked paint and concrete is removed from arrow to arrow.

Notifying Residents

Notification flyers are posted on doors advising residents of upcoming concrete and paving operations. The flyers will explain the cooperation needed from residents to minimize inconvenience and expedite the project. Residents are given as much notice as possible, typically between 12-48 hours to move vehicles off the roads. If residents do not comply, vehicles will be towed to a nearby location. Homeowner Associations are also contacted and notified

Expectations

Be aware of the heavy equipment and increased activity while driving in the area. Resident cooperation is required in observing the Traffic Control barricades, warning devices, and "No Parking" signs that are in place. Residents are informed not to water lawn while concrete is being removed or replaced. Marking flags should not be touched or moved.

Clean up

At the completion of concrete replacement, sidewalks are swept.