![]() Sand mining also affects the adjoining groundwater system and the uses that local people make of the river. Any volume of sand exported from streambeds and coastal areas is a loss to the system.Įxcessive instream sand mining is a threat to bridges, river banks and nearby structures. The effect of mining is compounded by the effect of sea level rise. It may also lead to saline-water intrusion from the nearby sea. Depletion of sand in the streambed and along coastal areas causes the deepening of rivers and estuaries, and the enlargement of river mouths and coastal inlets. Instream mining lowers the stream bottom, which may lead to bank erosion. Any volume of sand exported from streambeds and coastal areas is a loss to the system.Įxcessive instream sand-and-gravel mining causes the degradation of rivers. ![]() In-stream mining lowers the stream bottom, which may lead to bank erosion. Mining operators, in conjunction with cognizant resource agencies, must work to ensure that sand mining is conducted in a responsible manner.Įxcessive in-stream sand-and-gravel mining causes the degradation of rivers. Today, demand for sand and gravel continues to increase. For thousands of years, sand and gravel have been used in the construction of roads and buildings.
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