Overview
GRANITE CREEK QUARRY LEASE AREA 2, 3, & 7 is a stormwater outfall in Sitka, Alaska, managing runoff from quarry operations. It operates under the US EPA NPDES MS4 permitting framework.
GRANITE CREEK QUARRY LEASE AREA 2, 3, & 7 is a stormwater outfall located at 401 Granite Creek Road in Sitka, Alaska. This facility manages stormwater runoff from quarry lease areas, discharging into local waterways. As a stormwater outfall in the United States, it operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) regulations, including MS4 permits for municipal separate storm sewer systems. The facility is situated in Sitka City and Borough, Alaska, a region with a maritime climate and significant precipitation. Stormwater management in this area must address runoff from industrial activities, including quarry operations, to prevent erosion and sedimentation. The outfall likely includes best management practices such as sediment basins or vegetative buffers to control pollutant discharge. This stormwater outfall plays a key role in protecting downstream water quality in Granite Creek and surrounding ecosystems. Proper management of stormwater from quarry activities helps minimize impacts on aquatic habitats and supports compliance with state and federal water quality standards. The facility contributes to the broader stormwater infrastructure in Sitka, which manages runoff from urban and industrial areas.
Environmental context
Sitka, Alaska, experiences high annual rainfall, making stormwater management critical to prevent erosion and sedimentation in local streams. The Granite Creek Quarry outfall discharges into a watershed that supports salmon habitat and other aquatic life. Industrial stormwater from quarry operations can contain suspended solids and heavy metals, requiring effective treatment to meet water quality standards under the Clean Water Act.
Frequently asked questions
The facility is located at 401 Granite Creek Road in Sitka, Alaska, within Sitka City and Borough.
It manages stormwater runoff from quarry lease areas, discharging treated or untreated runoff into local waterways under NPDES regulations.
It is regulated under the Clean Water Act through the NPDES program, likely under an MS4 permit for industrial stormwater discharges.
Alaska's cold climate and high precipitation require stormwater systems to handle snowmelt and permafrost conditions, with emphasis on erosion control and sediment management.
The outfall discharges into Granite Creek, which supports salmon habitat. Proper stormwater management prevents sedimentation and protects aquatic ecosystems.
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