Overview
GRANITE CONSTRUCTION RV PARK QUARRY is a stormwater outfall in Girdwood, Alaska, managing runoff from a quarry and RV park. It operates under the US EPA NPDES MS4 permit framework.
GRANITE CONSTRUCTION RV PARK QUARRY is a stormwater outfall located at 355 Wyatt's Windy Rd in Girdwood, Alaska, within the Anchorage Municipality. This facility manages stormwater runoff from a combined quarry and RV park operation, representing a small-scale industrial stormwater discharge point in a mountainous coastal region. The facility operates under the US Clean Water Act and is subject to NPDES MS4 permit requirements, likely as a Phase II small MS4 due to its location in a municipality. Stormwater outfalls in Alaska often face challenges from snowmelt and permafrost conditions, requiring robust erosion and sediment control measures. The quarry component may involve exposed soil and heavy equipment, increasing sediment runoff risk. This outfall discharges into local waterways that ultimately drain into Turnagain Arm of Cook Inlet, a sensitive estuarine environment. Proper stormwater management is critical to prevent sediment and pollutant loading that could impact salmon habitat and water quality in this ecologically significant region.
Environmental context
Girdwood is located in a temperate rainforest climate with high annual precipitation, including significant snowfall. Stormwater runoff from the quarry and RV park can carry sediment, heavy metals, and hydrocarbons into nearby creeks that support salmon spawning. The facility's discharge is subject to Alaska's water quality standards and the Clean Water Act, with potential impacts on aquatic life in the Turnagain Arm estuary.
Frequently asked questions
GRANITE CONSTRUCTION RV PARK QUARRY is located at 355 Wyatt's Windy Rd in Girdwood, Alaska, within the Anchorage Municipality, United States.
This facility is a stormwater outfall that manages runoff from a quarry and RV park, discharging treated stormwater under NPDES MS4 permit requirements.
Stormwater outfalls in Alaska are regulated under the Clean Water Act through NPDES MS4 permits, with Phase II requirements for small municipalities and industrial facilities like quarries.
Quarry stormwater runoff often contains sediment, heavy metals, and hydrocarbons from equipment, which can impact local water quality and aquatic habitats.
Proper stormwater management reduces sediment and pollutant loads in streams that flow into Turnagain Arm, protecting salmon spawning grounds and estuarine ecosystems.
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