Total Maximum Daily Load for Organic Enrichment, Mud Creek, Muscatine County Iowa, 2003

(2003) Total Maximum Daily Load for Organic Enrichment, Mud Creek, Muscatine County Iowa, 2003. Natural Resources, Department of

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Abstract

This document consists of a single TMDL for organic enrichment that will result in water quality in Mud Creek consistent with the Iowa Water Quality Standards. Organic enrichment is a problem tied to low dissolved oxygen concentrations caused by point and nonpoint sources. This will be a phased TMDL. Phasing TMDLs is an iterative approach to managing water quality that becomes necessary when the origin, nature and sources of water quality impairments are not well understood. In Phase 1, waterbody load capacity, existing pollutant load over this capacity, pollutant sources, and load allocations to these sources are determined from available information. A monitoring plan will ascertain Phase 1 load reduction success as well as whether the calculated Phase 1 load capacity provides water quality adequate to support designated uses. Monitoring activities may include routine sampling and analysis, biological assessment, fisheries studies, and watershed and/or waterbody modeling.