Big Eau Pleine TMDL Monitoring


Project Description: The project will consist of mulit-phased intensive sampling effort that utilizes an already developed partnership between, WDNR, Wisconsin Valley Improvement Company (WVIC) and a Citizen Based Monitor (CBM). WDNR will be responsible for obtaining roughly 1/3 of the samples while the other partners will obtain the remainder. Sampling will start in October 09 with tributary monitoring at four locations (three tribs and one outflow). Each site will have field tests comlpleted and chemical analyses for nutrients and suspended solids that will generate the needed data for a TMDL. Trib monitoring: The major tribuatary has an established gaguing station, however another will be established on a second trib. WVIC will be sampling in lake samples for the necessary consituents once a month and WDNR will conduct the sampling the remainder for the bi-monthly sampling. A CBM will obtain monthly samples in tributaries once a month with DNR obtaining the balance. Lake Sampling: Bi-monthly lake sampling will commence in April 2010 and will continue through end of the fiscal year. Sampling continues until FY2011. There will be three sampling locations strategically placed on the fllowage. Sampling one a month will be performed by WVIC. WDNR will sample the other event the same day as the trib sampling to reduce travel costs and time. CBM's may be used to gather secchi data over the same period also. DO/Temp/ph/Cond profiles will be conducted at the three sampling points on the lake.


Project Justification: The Big Eau Plaine flowage has a well documented history of dissolved oxygen problems associated with nutrient loading from agricultural runoff. A special project conducted in 2005, showed very high levels of BOD loading in addition to the nutrients. Moreover, the Marathon County Land and Water Conservation Department (LWCD) has been working with local farmers to control runoff but more quantification from specific areas is needed. The finished product, a TMDL, will provide all cooperating partners with a valuable tool for land management. The Big Eau Plaine is an immensely popular fishing destination for anglers accross the state. A noted walleye, bass, pike, musky and panfish population draws anglers of all ages and sports clubs to the area. Many other nonangling citizens use the flowage as a destination for vactions. FInally, this flowage suffers from major algal blooms due to vast nutrient loading. Because of the algal blooms there are large diurnal fluctuations of dissolved oxygen and pH. These values often exceed water quality standards and are responisble for the 303D listing.


Activity Code: WTMM

Related Reports

Run Project Summary Report
View Umbrella-Projects
View Related-Projects

TMDL/303d Projects
Monitor Listed Waters
Final Report Needed
Reports and Documents
Impaired Waters Budget
Activities & Recommendations
Monitor or Propose 303(d) Listing
Nutrients, TS, VSS physical constituents