Green Mountain Reservoir opens May 15 with boat inspections at Heeney Marina

 Public asked to follow state and local COVID-19 guidance for boaters

SILVERTHORNE, Colo. – The boating season begins this week at Green Mountain Reservoir with the boat ramp and Aquatic Nuisance Species (ANS) inspection station at Heeney Marina opening May 15.

The Forest Service, Colorado Parks and Wildlife (CPW), Summit County, and the Bureau of Reclamation have taken proactive steps to continue to monitor and protect Green Mountain Reservoir since the presence of invasive quagga mussel larvae was confirmed in the reservoir two years ago.

All trailered and/or motorized watercraft are required to enter and exit the reservoir from the Heeney Marina boat ramp. All other boat ramps and shoreline launches are prohibited.

Boats entering Green Mountain Reservoir will continue to be inspected prior to entry to prevent further introductions of invasive mussels and other aquatic nuisance species into the reservoir. The boat ramp will be open daily from 7 a.m. - 7 p.m. The boat ramp is closed when inspectors are not present.

Cooperation with Colorado’s mandatory ANS inspection and decontamination program has proven successful to stop the movement of harmful invasive species, such as quagga mussels, into new waters.

The ANS inspection station will continue to implement containment protocols put in place last year. In addition to inspection of boats before launching into Green Mountain Reservoir, boats will also receive a high-risk inspection after coming off the water. If a boat has ballast tanks, an inboard or inboard/outboard engine, or cannot be fully drained and dried, it will be required to get standing water decontamination. All boats leaving will get a green seal and blue receipt indicating they were last in Green Mountain Reservoir and have followed proper inspection and decontamination procedures.

All of the campgrounds at Green Mountain Reservoir are currently closed and will not open until sometime in June in order to comply with state and local COVID-19 public health requirements. McDonald Flats Boat Ramp, when open, is only open to non-motorized hand-launched and hand-powered watercraft. The reservoir will close to motorized watercraft on Sept. 30, 2020 at 7 p.m.

For more information about how you can help protect Colorado’s bodies of water from invasive species, visit Colorado Parks and Wildlife here:

The public is asked to follow Colorado Parks and Wildlife’s COVID-19 Guidance for Boaters:

Guidance for Boaters

Boaters must comply with CPW's Aquatic Nuisance Species regulations to stop the spread of zebra or quagga mussels and other invasive species. Boaters must also follow CDPHE and Summit County COVID-19 requirements. Please stay in your local area and do not travel to go boating.

  • Stay home if you are sick and keep your family home if they are sick.
  • Maintain a social distance of six feet minimum when interacting with CPW staff or other people outside of your household. 
  • Wear a mask while in buildings open to the public and outdoors whenever at least 6-feet of separation cannot be maintained between other individuals.
  • Wait for the inspector to wave you forward to the inspection station.
  • Remain in your vehicle, set the parking brake, and turn the vehicle off.
  • Stay in your vehicle unless asked to get out and assist the inspector.
  • If you have a green seal receipt, please keep your window closed and show it to the inspector through the window glass.
  • Follow the inspector’s instructions. Always maintain six feet minimum between you and staff or any other people outside of your household.
  • Avoid boating with anyone that doesn’t reside in your household.
  • Avoid gathering in groups larger than ten individuals and maintain physical distance.
  • Local health board guidance may limit to groups as small as four persons; please know and follow all local health board guidance.
  • Clean surfaces in your boat, on your trailer, and personal items using regular household products.


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