The City of Richland, Washington, is soliciting bids to establish a three-year contract for the provision of asphalt, concrete, rock, and related materials. The contract will be awarded on an as-needed basis, and the successful bidder will be required to provide the materials in accordance with the specifications. The contract includes various schedules for different types of materials, including asphaltic materials, concrete materials, rock materials, recycled materials, ecology blocks, and miscellaneous charges. The contract also includes provisions for hourly rates, overtime rates, and minimum delivery charges.