Control of Water Pollution during Dam Construction

With proper planning, owners can avoid water pollution from sediments and sludge during the construction of dams, cofferdams, docks, bridges, piers, culverts, dikes, weirs, or retaining walls near rivers, streams, or other waterways. Prior to construction they should consider how silts, clays, oils, cements, and other materials might enter the stream from haul roads, from erosion of excavation areas, earthfill, and spoil piles, or during the processes of clearing reservoirs or of diverting streams around foundations. They must consider the effect of construction procedure upon drainage, public water supply, recreational facilities, the fishery, and esthetics. Working with agencies charged with the protection of specific stream uses and with the maintenance of water quality standards, they should specify appropriate pollution control measures in construction contracts and should make certain that bidders understand them. Contract specifications related to pollution control appear in an appendix.