Clearwater River Watershed District
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    • Clearwater River Chain of Lakes (1980) Restoration Project >
      • Annandale Wetland Treatment System
      • Kingston Wetland Feasibility Study and Restoration Project
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      • Alternative Tile Intake Project
      • Clearwater River Channel Stabilization (CCM Riparian) Project
      • Clearwater River Restoration & Protection Phase II Project
      • City of Kimball Stormwater Treatment Phase II
      • Targeted Fertilizer Application Reduction Project
      • Watkins Area Stormwater Treatment Project
      • Willow Creek (Kimball Phase I) Stormwater Retention / Reuse Project
      • Potential Future Implementation Projects
    • Bass Lake AIS Management
    • Clear Lake South Notch Weir
    • Cedar Albion Swartout Henshaw Project #06-1 >
      • CASH Project #06-1 Fish Barriers
      • CASH Project #06-1 Rough Fish Removal
      • CASH Project #06-1 Segner Pond
      • Cedar Lake Watershed Protection & Improvement Project
    • Clear Lake North V-Notch Weir
    • Clearwater Lake Milfoil Treatment
    • CRWD Bog Control Projects
    • Communal Sanitary Sewer Systems >
      • Clearwater Harbor - Hidden River Project #18-1 (Nitrogen Mitigation & Analysis Plan Implementation)
    • Lake Augusta Aquatic Invasive Species (AIS) Project
    • Lakes Louisa & Marie Aquatic Invasive Species (AIS) Project
    • Norton Avenue Basin
    • Ostmark Basin
    • Pleasant Lake Outlet Control Structure
    • Cedar Lake Aquatic Invasive Species (AIS) Project
    • School Section Lake Outlet Control Structure
    • Wastewater Treatment Task Force
    • Water Quality Monitoring Program
  • Contact

Grass Lake Dam Readings

Picture
The CRWD watches the lake level near the dam on Grass Lake because a DNR permit requires the watershed to close the outlet at Pleasant Lake when the elevation at Clearwater Lake reaches 992.13'. This is called the "cutoff" elevation. We can have a good estimate at what the Clearwater Lake elevation is based on the info at Grass Lake since they are connected by a channel. The water level at the Grass Lake Dam site is monitored continuously from approximately May to October each year. We use a device called a pressure transducer which is hooked up to an antenna and this sends us the data once per hour.  We also have a staff gauge (a fancy term for a ruler) attached to the dam where we can verify that the information we are getting from the transducer is accurate.

The Ordinary High Water level (OHW) on Clearwater Lake is 991.3' and on Grass Lake is 990.9'.  The OHW is defined as a location around the lake where there is a change in soil and vegetation that shows us where the water usually meets the land. The highest recorded water level on Clearwater Lake was 996' and Grass, it was 995.23'. These both occurred on 6/27/1983.

The rains of mid-May this year caused water levels to rise rapidly. After a peak of 993.00' on 5/18/2022, water levels started to recede and have continued to do so at a slow but steady pace.  
In June and early July, floating bogs caused issues at Grass Lake Dam and in Clearwater Lake. The bogs were pulled out from around the dam. Low precipitation has kept lake levels right around the OHW since mid-July.

**All elevation information is being reported in NGVD29 datum. If you use NAVD88 datum, you would add approximately 0.5' to the elevation numbers listed here.

Picture
Latest readings 
Date           Elevation       Gauge Reading
4/1/2022 - 990.40'           2.31 
​4/16/2022 - 991.34'          3.25
​5/12/2022 - 991.66'          3.57
5/13/2022 - 991.86'          3.77
5/16/2022 - 992.69'         4.6
​5/17/2022 - 992.88'         4.78
​5/18/2022 - 992.94'         4.85
5/19/2022 - 992.99'         4.9
5/20/2022 - 992.99'        4.9
5/21/2022 - 992.91'          4.82
5/23/2022 - 992.75'        4.66
​5/24/2022 - 992.66'        4.57
​6/1/2022 - 992.13'            4.04
​6/6/2022 - 991.86'           3.76
6/8/2022 - 991.79'           3.69
6/27/2022 - 991.16          3.07
7/26/2022 - 990.86'       2.77
8/29/2022 - 991.05'        2.96  
​
​*Please note these elevations are in NGVD29 datum. If you use NAVD88, add approximately 0.5' to these numbers.

This page is maintained by CRWD Board Managers. 
​
​© Copyright 2020
Board Meetings
Third Wednesday of the month at 6pm
​
Special and emergency meetings may be called. Such meetings will be properly notice per MN Statutes. 
Clearwater River Watershed District 
93 Oak Avenue South, Suite 5
Annandale, MN 55302

Mailing Address:
3235 Fernbrook Ln N
​Minneapolis, MN 55447
Website created by Skol Marketing
  • Home
  • Learn About the CRWD
    • Board of Managers
    • Board Meetings
    • Meeting Minutes
    • Advisory Committee
    • Staff
    • Guiding Documents >
      • CRWD 10 Year Watershed Plan
      • CRWD Rules & Regulations
      • Policy Book
    • General Watershed Information
    • AIS Education
    • Glossary
  • Reports
    • Annual Reports
    • Audit Reports
    • CRWD Brochures
    • Total Maximum Daily Load Reports
    • Water Quality Monitoring Reports >
      • Grass Lake Dam Readings
    • Reports
  • How You Can Help
    • Incentives >
      • Agricultural Incentives
      • Residential / Commercial Incentives
      • Partnership Incentives
    • Invasive Species
    • Implement Best Management Practices (BMPs)
    • Increase your knowledge
    • Join a Lake Association
  • Projects
    • Clearwater River Chain of Lakes (1980) Restoration Project >
      • Annandale Wetland Treatment System
      • Kingston Wetland Feasibility Study and Restoration Project
    • Total Maximum Daily Load (TMDL) Implementation Projects >
      • Alternative Tile Intake Project
      • Clearwater River Channel Stabilization (CCM Riparian) Project
      • Clearwater River Restoration & Protection Phase II Project
      • City of Kimball Stormwater Treatment Phase II
      • Targeted Fertilizer Application Reduction Project
      • Watkins Area Stormwater Treatment Project
      • Willow Creek (Kimball Phase I) Stormwater Retention / Reuse Project
      • Potential Future Implementation Projects
    • Bass Lake AIS Management
    • Clear Lake South Notch Weir
    • Cedar Albion Swartout Henshaw Project #06-1 >
      • CASH Project #06-1 Fish Barriers
      • CASH Project #06-1 Rough Fish Removal
      • CASH Project #06-1 Segner Pond
      • Cedar Lake Watershed Protection & Improvement Project
    • Clear Lake North V-Notch Weir
    • Clearwater Lake Milfoil Treatment
    • CRWD Bog Control Projects
    • Communal Sanitary Sewer Systems >
      • Clearwater Harbor - Hidden River Project #18-1 (Nitrogen Mitigation & Analysis Plan Implementation)
    • Lake Augusta Aquatic Invasive Species (AIS) Project
    • Lakes Louisa & Marie Aquatic Invasive Species (AIS) Project
    • Norton Avenue Basin
    • Ostmark Basin
    • Pleasant Lake Outlet Control Structure
    • Cedar Lake Aquatic Invasive Species (AIS) Project
    • School Section Lake Outlet Control Structure
    • Wastewater Treatment Task Force
    • Water Quality Monitoring Program
  • Contact