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UTILITY STRUCTURE ADJUSTMENTS
Prior to resurfacing your asphalt, it is often necessary to raise the existing utility structures to match the new asphalt elevation. Utility structures would include manholes (sewer, storm), water valve risers, sewer cleanouts, drain inlets, and catch basin. In all cases, the desired result should be to provide a smooth transition from the new resurfaced asphalt to the existing utility structures. This will enhance the ride and appearance of the finished product.
The Process:
- Many utility structures can be using a pre-manufactured steel riser ring of the proper height to match the specified thickness of the resurfacing. The riser ring is placed on the top of the utility base after the existing cover is removed. After the riser is installed, the cover can be replaced and the job is ready to be resurfaced.
- Some utility structures can not be adjusted using a riser ring and must be raised using other means. Typically the utility structure can either be manually adjusted by turning the existing riser, as in the case of a water valve, or raised by adding solid concrete bricks that are mortared onto the existing structure foundation (under the base) to achieve the necessary height to accommodate the specified resurfacing thickness.
- Another effective way, if existing grades permit, is to adjust the existing height of the asphalt surrounding the utility structure. This can be achieved by profile milling around the utility. This approach works best around inlet drains that are located in the middle of the area to be resurfaced.
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