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<br />7. Maintenance/Rehabilitation Projects <br />a. Bituminous Overlay <br />Placement of an additional bituminous layer, generally <br />1 to 2 inches thick, over an existing bituminous surfaced <br />street. <br /> <br />b. Crack Sealing <br />Placement of petroleum based material in the cracks of a <br />bituminous surfaced street for the purpose of eliminating <br />the flow of water from the surface to the aggregate base <br />material below. <br /> <br />c. Bituminous Seal Coating <br />Placement of petroleum based material and aggregate on an <br />existing bituminous surfaced street for the purpose of <br />filling cracks and covering mild wear. <br /> <br />B. Determining Street Assessment Rates <br /> <br />1. Commercial/Industrial Streets <br />By definition, commercial/industrial streets are constructed to <br />support heavier traffic axle loadings and are wider than <br />residential streets. <br /> <br />As these streets are constructed to higher standards they are <br />usually more expensive than residential streets. In areas where <br />commercial/industrial streets serve properties whose use or zoning <br />is commercial or industrial, the costs of street construction <br />shall be assessed to abutting properties on a front foot basis. <br /> <br />21 <br />