Hayden Lake Watershed Improvement District

  • Home
  • The District
    • HLWID – District Matters
    • Board of Directors
    • Lake Managers
    • Communication and Public Outreach
    • Monthly Meetings
  • The Watershed
    • Blue-Green Algae
    • Citizen Science
    • HLWID – District Matters
    • Lake Debris
    • Living on Hayden Lake
      • Rights, Permits, etc.: Who to Contact
    • Noxious Weeds
      • Curly-Leaf Pondweed
      • Eurasian Watermilfoil
    • Recreation
    • Water Quality
      • Hayden Lake Water Quality
      • Idaho Water Quality Standards & Hayden Lake
      • The Eutrophication of Hayden Lake
    • The Watershed
      • Hayden Lake Watershed
      • English Point – a Cherished Resource
  • News
  • Contact Us
Menu
  • Home
  • The District
    • HLWID – District Matters
    • Board of Directors
    • Lake Managers
    • Communication and Public Outreach
    • Monthly Meetings
  • The Watershed
    • Blue-Green Algae
    • Citizen Science
    • HLWID – District Matters
    • Lake Debris
    • Living on Hayden Lake
      • Rights, Permits, etc.: Who to Contact
    • Noxious Weeds
      • Curly-Leaf Pondweed
      • Eurasian Watermilfoil
    • Recreation
    • Water Quality
      • Hayden Lake Water Quality
      • Idaho Water Quality Standards & Hayden Lake
      • The Eutrophication of Hayden Lake
    • The Watershed
      • Hayden Lake Watershed
      • English Point – a Cherished Resource
  • News
  • Contact Us
Facebook
Twitter
  • Living on Hayden Lake, Noxious Weeds
  • August 7, 2020

Main Lake Weed Update

Looking south one winter day from Rockaway Bay

Monthly Meeting Minutes Archive

A view from the dike at 2/2020 low water.

More to Explore In the Hayden Lake Watershed

Snow caps the mountains north of Hayden Lake late into April, '19.

Monthly Meetings

Recreational Boating on Hayden Lake

Potential Ordinance Change Will Affect Narrow Waterways, Not Hayden Lake

One of fourteen new, permitted buoys on Hayden Lake

New Navigation Buoy Installation – Completed

Herbicide and Diver Treatments set for Aug 20-25

  • Living on Hayden Lake, Noxious Weeds
  • August 7, 2020
It seems unfair, giving all the attention to the North Arm of the lake. The Main Body of the lake is not without its weed concerns too.
Hayden lake, looking north from Honeysuckle Bay
Aerial view of Hayden Lake shows treatment areas for August 2019 Noxious Weed treatment.
Aerial view of Hayden Lake shows 2019 Noxious Weed treatment areas. ProcellaCOR herbicide used.

Exactly one year ago, the Idaho State Department of Agriculture (ISDA) treated the southern end of the lake with the then-new herbicide, ProcellaCOR.  This promising solution targeted Eurasian Watermilfoil (EWM). It worked systemically to disrupt the weed’s normal cell function to the degree that the plant died. Most notably, the herbicide worked at the root level, ensuring that the weed would not regrow and propagate in 2020.

Main Body Remains Clear of EWM

Recent surveys of the 2019 treatment areas, as well as a lake-wide survey of the full littoral zone, have revealed the hoped-for suppression of EWM growth in the Main Body of the lake. Last year’s treatment areas are clear, except for a persistent patch in the far reaches of Mokins Slough.

There are a few new growth areas just outside of the 2019 ProcellaCOR treatment areas: on the north shore of O’Rourk Bay, around Yellowstone Point, and inside the bay between Chicken Point and Hayden Haven Rd.  The North Arm has its share of persistent sites too: the back of Skinner Bay, McLeans Bay, plus stretches to the north and south of McLeans.

Treatment Scheduled for Aug 20-25

All of these areas are the target of the next treatment phase scheduled for August 20-25. A testament to the improvements in weed management is the plan for diver-removal or hand-harvesting weeds in the sparsely populated areas like Mokins, McLeans, and Chicken Point.  There, the shoots are few. Divers will be able to pull the weeds while inspecting for and eliminating the newest growth. The other growth areas will require herbicide treatment. ProcellaCOR will be the chemical of choice, resulting in very limited water-use restrictions.

As always, if you do happen to find an invasive species in your area, please be sure to share photos, location, and density information with ISDA. Jeremey Varley and Kim Holzer want to know!

PrevPreviousNorth Arm Weed Update
NextHerbicide and Diver Treatments set for Aug 20-25Next
Recreational Boating on Hayden Lake

Potential Ordinance Change Will Affect Narrow Waterways, Not Hayden Lake

One of fourteen new, permitted buoys on Hayden Lake

New Navigation Buoy Installation – Completed

Herbicide and Diver Treatments set for Aug 20-25

Looking south one winter day from Rockaway Bay

Monthly Meeting Minutes Archive

A view from the dike at 2/2020 low water.

More to Explore In the Hayden Lake Watershed

Snow caps the mountains north of Hayden Lake late into April, '19.

Monthly Meetings

Looking south one winter day from Rockaway Bay

Monthly Meeting Minutes Archive

A view from the dike at 2/2020 low water.

More to Explore In the Hayden Lake Watershed

Snow caps the mountains north of Hayden Lake late into April, '19.

Monthly Meetings

  • Related Content: Living on Hayden Lake, Noxious Weeds
Receive Hayden Lake Watershed News in Your Inbox

About HLWID

The mission of the Hayden Lake Watershed Improvement District is to protect and enhance the water quality and the environmental quality within the watershed.

Share on facebook
Share on twitter
Share on pinterest
Share on email

News from the 'Shed

Recent Posts
  • Potential Ordinance Change Will Affect Narrow Waterways, Not Hayden Lake
  • Thank you, Pat Lund. Welcome new Board Member, Kristine Bartz
  • New Navigation Buoy Installation – Completed
  • Herbicide and Diver Treatments set for Aug 20-25
  • Main Lake Weed Update

More to Explore

Home

News From the 'Shed

Potential Ordinance Change Will Affect Narrow Waterways, Not Hayden Lake

Thank you, Pat Lund. Welcome new Board Member, Kristine Bartz

New Navigation Buoy Installation – Completed

More news ...

The District

  • About the HLWID
  • HLWID – District Matters
  • Board of Directors
  • Lake Managers
  • Communication and Public Outreach
  • Monthly Meetings
Menu
  • About the HLWID
  • HLWID – District Matters
  • Board of Directors
  • Lake Managers
  • Communication and Public Outreach
  • Monthly Meetings

The Watershed

  • Blue-Green Algae
  • Citizen Science
  • HLWID
  • Lake Debris
  • Living on Hayden Lake
    • Rights, Permits, Questions, Concerns: Who to Contact
      • Noxious Weeds
  • Recreation
  • The Watershed
  • Water Quality
Menu
  • Blue-Green Algae
  • Citizen Science
  • HLWID
  • Lake Debris
  • Living on Hayden Lake
    • Rights, Permits, Questions, Concerns: Who to Contact
      • Noxious Weeds
  • Recreation
  • The Watershed
  • Water Quality

Let's Stay in Touch!

Facebook-f
Twitter

Contact us!

Copyright 2020 © All rights reserved, Hayden Lake Watershed Improvement District.

Made with ❤ by Elementor​​

Monday 4/16, 7:00 p.m.

HLWID Monthly Meeting

HLWID's Monthly Meetings will move to teleconferencing in order to ensure the health and safety of our constituents. For 4/16's meeting, dial 641-715-0861 and enter code 398963# at the prompt. This is a public meeting; all are welcome.