Overview
SITKA ROCKY GUTIERREZ AIRPORT MSGP is an operational stormwater outfall in Sitka, Alaska, managing runoff from airport facilities under the EPA's MSGP permit framework.
SITKA ROCKY GUTIERREZ AIRPORT MSGP is a stormwater outfall located at 605 Airport Road in Sitka, Alaska, within the Sitka City and Borough. It serves the Rocky Gutierrez Airport, managing stormwater runoff from airport operations and infrastructure. As a stormwater outfall, it discharges treated or untreated stormwater to receiving waters, subject to National Pollutant Discharge Elimination System (NPDES) permitting under the Clean Water Act. This facility operates under the Multi-Sector General Permit (MSGP) for industrial stormwater discharges, which covers airports and other industrial sectors. The MSGP requires implementation of stormwater pollution prevention plans (SWPPPs), best management practices (BMPs), and monitoring to minimize pollutant runoff. In Alaska, stormwater management must also consider cold climate challenges such as snowmelt and frozen ground conditions. The outfall discharges into the local watershed, which ultimately drains to the Pacific Ocean near Sitka. Sitka is a coastal community in Southeast Alaska, known for its temperate rainforest and sensitive aquatic ecosystems. Proper stormwater management at the airport helps protect water quality in receiving waters, supporting local fisheries and marine habitats that are vital to the region's economy and environment.
Environmental context
Sitka is located in the Tongass National Forest, a temperate rainforest with high annual precipitation. Stormwater runoff from the airport can carry pollutants such as de-icing chemicals, fuel residues, and sediment into nearby streams and marine waters. The region supports critical salmon habitat and commercial fisheries, making stormwater quality management essential for ecological and economic sustainability.
Frequently asked questions
The facility is located at 605 Airport Road in Sitka, Alaska, within the Sitka City and Borough, serving the Rocky Gutierrez Airport.
It is a stormwater outfall that manages and discharges stormwater runoff from the airport industrial activities, regulated under the EPA's Multi-Sector General Permit (MSGP).
Airport stormwater discharges are regulated under the Clean Water Act via NPDES permits, typically the Multi-Sector General Permit (MSGP) for industrial activities, which requires pollution prevention plans and monitoring.
Stormwater management at airports uses best management practices (BMPs) such as detention basins, oil-water separators, and de-icing fluid collection to reduce pollutant loads, protecting local water bodies and aquatic ecosystems.
Common pollutants include de-icing fluids (ethylene glycol, propylene glycol), fuel residues, heavy metals, sediment, and litter, which can harm aquatic life if not properly managed.
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