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Indiana Department of Environmental Management

Nonpoint Source Water Pollution


Upper Mississinewa River Watershed TMDL

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The Upper Mississinewa River Watershed is located in east-central Indiana along the Ohio state border and drains portions of Blackford, Delaware, Grant, Jay and Randolph counties. The watershed has a surface area of 315 square miles and drains a total of 446 square miles. Major waterbodies included in the Total Maximum Daily Load (TMDL) report are Mississinewa River, Halfway Creek, Big Lick Creek, Little Lick Creek, Redkey Run, Flesher Creek, Townsand Lucas Ditch, Moore Prong, Rees Ditch, Bosman Ditch, Studebaker Ditch, Brush Creek, Bear Creek and Campbell Creek.


A preliminary survey of the Upper Mississinewa River Watershed was conducted by Indiana Department of Environmental Management (IDEM) in 2008 through the probabilistic sampling program. Impairments include E. coli, biological impairments, and PCB and total mercury in fish tissue. Potential pollution sources in the watershed include nonpoint sources from agricultural lands and pastures, land application of manure and urban and rural run-off, as well as point sources from straight pipe discharges, and home sewage treatment system disposal.

Parameters to be Addressed

IDEM will complete a comprehensive sampling program in the watershed that were based on the current impairments. Approximately 35 sites were assessed for general chemistry, nutrients, habitat, fish and macroinvertebrate communities, and stream flow. For a comprehensive list of all parameters please reference the approved work plan.


Two Upper Mississinewa public kickoff meetings was held on March 13, 2014. The first meeting was held at 2:30 PM (EDT) at the Davis-Purdue Agricultural Center, 6230 N State Road 1, Farmland, IN. The second kickoff meeting was held at 6:30 PM (EDT) at the Hartford City Annex Building, 121 North High Street, Hartford City, IN. Meetings covered the same topics.

Additional meetings will be held as needed. Please check the IDEM calendar for updates.

A first draft TMDL meeting was held in the Summer of 2015 once the comprehensive sampling program was completed.

The TMDL Report

Baseline Project 2014-2015

Supplemental Information