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Otter Creek Watershed TMDL


The Otter Creek watershed is located in west-central Indiana, draining approximately 124 square miles in Clay, Parke, and Vigo Counties. Major streams included in the TMDL report are Otter Creek, Sulphur Creek, Gundy Ditch, and North Branch Otter Creek as well as tributaries.


A comprehensive survey of the Otter Creek watershed was conducted by Indiana Department of Environmental Management (IDEM) in 2009. The primary cause of impairment is Escherichia coli bacteria (E. coli) sources in the watershed include non-point sources e.g. row crop agriculture and pastures, urban and rural runoff, land application of manure, and point sources e.g. straight pipe dischargers, and failing home sewage treatment system disposal.

Pollutants Addressed

TMDLs for the Otter Creek watershed are established for Escherichia coli bacteria (E. coli) and will address 23 impairments. Some of the recommended solutions to address the impairments include storm water controls, point source controls, manure management, and habitat improvements.


One Kickoff TMDL Meeting was held on January 17, 2011. The first meeting was held at the Vigo County Annex, 127 Oak Street, Terre Haute IN, 47807

One Draft TMDL Meeting will be held June 4, 2013. The second meeting will also be held at the Vigo County Annex, 127 Oak Street, Terre Haute IN, 47807

The 30-day public comment period will follow the Draft TMDL Meeting.

U.S. EPA under Section 303(d) of the Clean Water Act has yet to approve the Otter Creek Watershed Total Maximum Daily Load (TMDL) report. TMDL reports identify and evaluate water quality problems in impaired water bodies and propose solutions to bring those waters into attainment with water quality standards.

The TMDL Report

Supplemental Information

Watershed stakeholders and partners can use the final approved TMDL report to craft a watershed management plan (WMP) that meets both U.S. EPA’s nine minimum elements under the CWA Section 319 Nonpoint Source Program, as well as the additional requirements under IDEM’s 2009 WMP Checklist. Contact your IDEM Watershed Specialist to find out more.