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Road construction and maintenance

Road construction and maintenance

Summer road preservation

Starting in April, Public Works begins annual road surface treatments. The county uses several different methods to preserve roads and to protect the public’s investment in its transportation infrastructure.

Weather to delay nighttime paving on NE Andresen Road - Sept. 22, 2014
A contractor working for Clark County will continue paving on the night of Monday, Sept. 22. But with the forecast calling for wet weather, it might be the last night of work until the weather improves.

The contractor is paving NE Andresen Road, from NE 78th Street to 450 feet north of Interstate 205. Nighttime paving requires closing sections of Andresen Road between 9 p.m. and 6 a.m.

Wet weather also likely will require the contractor to postpone nighttime paving on NE 42nd Avenue, from SR 500 north to NE 38th Street. That work was scheduled for Thursday, Sept. 26.

Weather conditions will dictate when paving can resume. Clark County appreciates the public's cooperation and understanding.

Program update - Sept. 10, 2014
Because of a heavy work load for our contractor, Clark County has decided not to finish the remainder of its annual slurry seal and rubberized asphalt cape seals programs this year. With the start of school, there would be too many conflicts with school buses using the streets that would need to be closed to allow the slurry seal to cure. Residents along streets that will not be sealed this year will receive letters alerting them of the change and saying their streets will rescheduled for future treatment.

Asphalt overlay
This surface treatment provides structural reinforcement on arterial and collector roads in urban and rural areas. Surface defects and irregularities are repaired prior to adding a 1- to 4-inch layer of asphalt. There are significant driving delays.

Slurry seal
This surface treatment is applied to access and subdivision roads in urban areas to prevent moisture from infiltrating the subgrade. These roads are structurally sound and do not need reinforcement. Emulsified oil, crushed aggregate and a curing compound are premixed on a truck and then applied to the road surface. This treatment requires the road be closed for 2 to 4 hours, depending on weather conditions, to allow curing before it can reopen to traffic.

Rubberized asphalt cape seal
The treatment consists of two parts. In the first phase, rubberized asphalt is applied to the road followed by a covering of crushed rock. The road is then rolled to press the gravel into the rubber-asphalt mix. The second phase, which typically will be done 1-2 weeks later, will involve applying a slurry seal to preserve the new surface. This is a one-day road process that will require closing the road.

Chip seal

Chip seal is used to help seal the surface and prevent moisture from damaging roads. This surface treatment is typically applied between mid-August and late September, weather permitting. Each area is completed within 1 - 3 days. Roads will not be closed, but you may experience temporary traffic delays. Watch for loose gravel and fresh oil signs and please drive slowly through work zones.

Micro seal
Micro seal is similar to a slurry seal, only that it uses larger pieces of rock. Cement also can be added to the mixture. A micro seal dries faster than a slurry seal and is used on multilane roads, which allows traffic to pass on one lane while the other is being treated. To further ease traffic disruptions, sand is shoveled onto intersections so vehicles can drive over the treated surface only minutes after it has been applied.

Note: No micro seals scheduled for summer 2014.

Vegetation trimming
In preparation for summer road work, residents sometimes need to prune their vegetation so county vehicles can get close to the curb. In addition, vegetation needs to be trimmed to improve traffic visibility and remove sidewalk or pedestrian obstructions.

Homeowners are responsible for pruning and maintaining their vegetation, including debris disposal. All low-hanging material needs to be trimmed to provide 14 feet of vertical clearance from the top of the curb and 8 feet of clearance from the full width of the sidewalk.

Residents who need to trim their vegetation will receive door hangers from the county. If they do not trim the vegetation, county road crews will cut back the vegetation. This work will be done at no cost, but it will not be done to a landscape quality desired by many residents.

 
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