Quick Facts
DNR Lake Number: 70007200*
Surface Area: 416 acres
Average Depth: 10 feet
Maximum Depth: 43 feet
Ordinary High Water Level: 903.9 feet above sea level
Connectivity to other waterbodies: Water flows into Upper Prior from Spring Lake through the Spring Lake channel and out of Upper Prior into Lower Prior Lake.
Watershed Area: 16,038 acres
Public Boat Access: Located on the southern end of Upper Prior off of Dewitt Ave.
Impairment Status: Impaired for excess nutrients. See the TMDL study for more information.
Bridge Clearance: The elevation at the bottom of Wagon Bridge (bridge under Highway 21) is approximately 911.5′. Subtract the current lake elevation from 911.5′ to get the approximate clearance.
Water Levels
NOTE: Some years only had one measurement so they would not necessarily reflect the “average”, but rather could have been the maximum or minimum. Years with multiple measurements reflect the average. Some years are missing from this graph because no known data is available.
Water Quality
The following graphs represent the annual averages between May 1 and September 30.
Current Projects
Completed Projects
- Spring Lake-Upper Prior Lake TMDL Report (link to MPCA site)
- Spring Lake-Upper Prior Lake TMDL Implementation Plan (2012)
Reports
- Upper Prior Lake In-Lake Phosphorus Management Plan (2017)
- PLSLWD Upper Watershed Assessment (2010)
- Prior Lake Historic Elevations Graph 1970-2015
- 1993 Diagnostic & Feasibility Study of Spring and Prior Lakes
Aquatic Vegetation Reports
- 2017 Upper and Lower Prior Lake Curlyleaf Pondweed Report
- 2008 Curlyleaf and Eurasian Watermilfoil Growth Potential based on Lake Sediment Characteristics for Spring, Fish, Upper Prior, and Lower Prior Lakes
- 2016 Upper and Lower Prior Lake Curlyleaf Pondweed Assessment
- 2016 Upper and Lower Prior Lake Aquatic Plant Evaluation
- 2015 PLSLWD Aquatic Plant Summary
- 2015 Upper and Lower Prior Lake Curlyleaf Pondweed Assessment and Aquatic Plant Survey
- 2014 Upper and Lower Prior Lake Curlyleaf Pondweed Assessment
- 2013 Upper and Lower Prior Lake Curlyleaf Pondweed Assessment
- 2012 Upper and Lower Prior Lake Curlyleaf Pondweed Assessment
- 2011 Upper and Lower Prior Lake Curlyleaf Pondweed Assessment
- 2010 Upper and Lower Prior Lake Curlyleaf Pondweed Assessment
