1017-011 Tuttle Lake Watershed Final Report

(2014) 1017-011 Tuttle Lake Watershed Final Report. Agriculture and Land Stewardship

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Abstract

The Tuttle Lake Watershed is approximately 125,000 acres and Tuttle Lake itself is 2,270 acres; 5,609 acres of the watershed lies in Iowa territory within Emmet County. It is a sub-watershed of the larger East Fork Des Moines River Watershed, also referred to as Hydrologic Unit Code 07100003. For the purpose of this document, grant money is only being applied for the project implementation in the Iowa portion of the Tuttle Lake Watershed. Tuttle Lake was placed on the 2002 EPA 303(d) Impaired Waters List due to a “very large population of suspended algae and very high levels of inorganic turbidity.” In 2004, the Iowa Department of Natural Resources (IDNR) completed a Total Maximum Daily Load (TMDL) study on Tuttle Lake and found excess sediment and phosphorus levels being the primary pollutants causing the algae and turbidity impairment. Although two point sources were located in Minnesota, IDNR determined that the influx of nutrients is likely from agricultural runoff and re-suspension of lake sediment. The condition of Tuttle Lake is such that the reduction of sediment, nutrients [phosphorus and nitrogen] and pathogens is the primary objective. To achieve that objective, wetlands will be constructed in this first phase to reduce the delivery of nitrogen, phosphorus, and sediment to Tuttle Lake.

Item Type: Departmental Report
Keywords: Watershed Improvement Review board, WIRB, water quality, watershed, Tuttle Lake Watershed, Emmet County, Emmet County Soil and Water Conservation District
Subjects: Natural resources and environment > Water resources > Water quality
Natural resources and environment > Water resources > Watersheds
ID Code: 21197
Deposited By: Jerome Neppel
Deposited On: 16 Feb 2016 12:59
Last Modified: 16 Feb 2016 12:59
URI: http://publications.iowa.gov/id/eprint/21197