Outlet Channel

Maintaining an unimpeded flow from Big Marine Lake through Little Carnelian Lake and the outlet pipe to the St. Croix River is a critical responsibility of the Watershed District.  CMSCWD was formed to reduce the threat of flooding in Big Marine and Carnelian Lakes and the solution was the result of many years of study of the causes to these water fluctuations.  Some of the reports that examine the causes of these water fluctuations are:

The range of elevations that the District maintains is a result of negotiations with riparian property owners and the Department of Natural Resources to both protect property and protect wetlands within the watershed.  The only variable in the system is an adjustable weir downstream of the fixed outlet and Turtle Lake.  The current management plan for the weir has evolved over the years and was approved by the DNR in 2004. The management plans are available for review here, from the current plan to the original management plan:

                       

Big Marine Lake Outlet Elevations

Yellow designates at or over weir elevation

(Turtle Lake Stop Log status)

  fixed Weir Overflow elevation is 940.8 feet

Date

Upstream of Weir

Downstream of Weir 

January 5, 2017 941.05 940.5 (all stop logs out)
February 8 941.01 940.45
February 14 940.87 940.36
February 21 941.03 940.48
March 3 941.02 940.42
March 20 940.99 940.3 
March 27 940.99 940.3
March 31 940.99 940.32
April 12 940.95 940.18
April 20 941.11 940.45
April 25 941.05 940.42
May 2 941.16 940.61
May 10 941.1 940.58
May 17 941.17 940.8
May 19 941.31 941.1
May 22 941.39 941.3
May 23 941.39 941.29
May 24 941.39 941.28
May 30 941.29 941.2
June 5 941.2 941.15
June 12 941.17 941.15
June 21 941.1 941.09
June 26 941.01 941.0
2016 Data

Pages 22 through 29 in Section IV of the Management Plan discusses the maintenance activities in further detail.  A history of water elevations of Big Marine Lake is available here.

The following is a log of this year's maintenance activites for Carnelian Creek (Big Marine Outlet Channel) and Silver Creek.  Most of the activities are directed toward the former: The 2016 Maintenance Log is available here.

CMSCWD Administrator Channel Maintenance Time Log 2017

Task

Detail

Weekday

Date

Duration

 

Turtle Lake Report

Wednesday

1/11/2017

1:00

 

Kelly Farm and Big Marine Water Levels

Tuesday

2/14/2017

1:00

 

Review Big Marine Document History

Monday

2/27/2017

1:00

 

Review Big Marine Document History

Monday

2/27/2017

1:30

 

Water Levels

Friday

3/3/2017

2:00

 

Update Website- Marine outlet

Monday

3/6/2017

1:30

 

Big Marine Memo

Wednesday

3/8/2017

3:00

 

South Twin Culvert

Friday

3/10/2017

1:00

 

Review Docs

Monday

3/13/2017

1:30

 

Turtle Lake memo

Tuesday

3/14/2017

3:30

 

Inspection to Little Carnelian

Monday

3/20/2017

2:00

 

update web

Tuesday

3/21/2017

0:30

 

Turtle Lake Weir

Thursday

3/23/2017

1:00

 

Inspection Little Carnelian flow and Silver Creek/ Carol Lake

Thursday

3/23/2017

1:30

 

Turtle Lake Weir

Thursday

3/23/2017

0:30

 

Inspection- Talk with Steve Grogan

Monday

3/27/2017

2:00

 

Big Marine Research

Tuesday

3/28/2017

3:00

 

Meeting Prep

Thursday

3/30/2017

2:30

 

South Twin Culvert

Friday

3/31/2017

0:30

 

Big Carnelian Outlet Group

Saturday

4/1/2017

1:00

 

South Twin Plugged Culvert- MnDOT

Friday

4/7/2017

0:15

 

Carol Lake Culvert/120th St. Ponds

Monday

4/10/2017

2:30

 

channel maintenance- South Twin and Carol Beavers

Wednesday

4/19/2017

2:00

 

South Twin and Carol Lake

Monday

4/24/2017

1:00

 

South Twin and Big Marine

Tuesday

4/25/2017

0:30

 

Water Levels and Channel Maintenance at Kelly and District

Tuesday

5/2/2017

2:00

 

Water Levels-District

Wednesday

5/10/2017

1:00

 

Survey to Carl

Friday

5/12/2017

1:00

 

Call Roger re: Carnelian Creek

Friday

5/12/2017

0:15

         

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total Time 2017 to date

42:00

Some other documents and reports dealing with the Big Marine Outlet Channel are listed below: