Overview
NORTH LEMON CREEK MATERIAL SOURCE is a stormwater outfall in Juneau, Alaska, managing runoff from the Lemon Creek Valley. It operates under the US EPA NPDES MS4 permit framework.
NORTH LEMON CREEK MATERIAL SOURCE is a stormwater outfall located in Juneau, Alaska, within the Lemon Creek Valley. As a stormwater outfall, it discharges collected runoff from urban and industrial areas into receiving waters, playing a key role in local flood control and water quality management. The facility operates under the regulatory framework of the US Clean Water Act, specifically the National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer System (MS4) permits. Juneau, as a Phase II small MS4, must implement stormwater management programs to reduce pollutant discharges to the maximum extent practicable. This outfall serves the Lemon Creek watershed, which includes residential, commercial, and industrial land uses. Proper management of stormwater from this area is critical to protect downstream water quality in the Gastineau Channel and surrounding marine ecosystems, which support salmon runs and other aquatic life.
Environmental context
Juneau's coastal rainforest climate produces high annual precipitation, leading to significant stormwater runoff. The Lemon Creek watershed drains into the Gastineau Channel, a marine waterbody that supports salmon, herring, and other species. Urban runoff from roads, parking lots, and industrial areas can carry pollutants such as sediment, heavy metals, and hydrocarbons, posing risks to aquatic habitats. Effective stormwater management at this outfall helps mitigate these impacts and maintain water quality standards.
Frequently asked questions
NORTH LEMON CREEK MATERIAL SOURCE is located in the Lemon Creek Valley, Juneau, Alaska, USA.
It is a stormwater outfall that discharges collected runoff from the Lemon Creek watershed into receiving waters, helping manage stormwater in Juneau.
It operates under the US Clean Water Act and the NPDES MS4 permit program, as Juneau is a Phase II small MS4.
Juneau's high rainfall and urban development generate runoff that can carry pollutants to sensitive marine habitats like the Gastineau Channel, making stormwater management critical for water quality.
Common pollutants include sediment, heavy metals, oil and grease, nutrients, and pathogens from urban and industrial surfaces.
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