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Mountain Lake Profile


by Greg Miller

Age: Over 12,000 years (Warren County's largest, natural, glacial lake)

Location: Mountain Lake Watershed (3,625 acres) a part of the Pequest and Upper Delaware Watersheds

Advisory Group: Mountain Lake Community Association (MLCA)

Area: 122 acres

Maximum Depth: 38 feet

Average Depth: 17 feet

Water Volume: 67,581,497 gallons

Main Inlets:

  • Mountain Lake Brook
  • Jenny Jump Brook
  • Three other unnamed streams

Primary Weeds :

  • Eurasian Water Milfoil
  • Water Lilies
  • Coontail
  • Curly Leaf Pondweed

Relevant Ordinances:

  1. No gas powered motors
  2. No feeding waterfowl
  3. No applying phosphorus fertilizer to residential lawns (except newly established turf)
  4. Clean up & properly dispose of pet waste that is deposited on public thoroughfares

Request by the MLCA for Residents and Visitors:

  1. Don't feed waterfowl.
  2. Pick up waste from pets.
  3. Don't litter.
  4. Don't use phosphorus based detergents and fertilizers.
  5. Conserve water.
  6. Maintain your septic system by having it pumped every three years.
  7. Create a "no-mow zone" around the water's edge to promote nutrient absorption and discourage geese.
  8. Give storm water a chance to run over natural land so that it can be absorbed through the soil. Don't discharge it directly into the water.