Drinking Water Grant Project

Hayden Lake WID Drinking Water Grant map from Hayden Creek to Hayden Haven.

Welcome to the North Arm of Hayden Lake

  • Formed when the dike was built in 1910 at the south end of Hayden Lake.
  • Extends from Hayden Haven to Hayden Creek.
  • Can be as shallow as 3 ft. deep at the far north end.
  • Covers former pastureland.
  • Supports 150 residents who directly draw drinking water from the lake and many more who recreate in the shallow, warm water.

The Challenge

  • The shallow, warm water is the recipient of nutrients and sediments from Hayden Creek – the perfect conditions for algae, cyanobacteria, and aquatic macrophytes.
  • This impacts the beneficial uses of Hayden Lake for drinking and recreation.

See more on the project Background / History page

HLWID Response

  • Early North End water quality monitoring. Click here to see the reports.
  • HLWID commissioned the North Arm Investigation Committee (NAIC) to review the conditions in the North Arm and identify gaps in water quality data.
  • Applied for and received an EPA Emerging Contaminations grant

Project overview

  • Dr. Frank Wilhelm, Professor of Limnology at the University of Idaho, and his team will assess nutrient cycling in lake sediment.
  • HLWID will determine the nutrient load coming from Hayden Creek.
  • Environmental Engineering will test possible solutions. 

See more on the Project Details page

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