Draft Osakis Lake Area Excess Nutrients Total Maximum Daily Load Report

Draft Osakis Lake Area Excess Nutrients Total Maximum Daily Load Report

2016

This Total Maximum Daily Load (TMDL) study addresses nutrient impairments for Smith Lake (DNR # 21-0016), Faille Lake (DNR # 77-0195) and Lake Osakis (DNR Lake # 77-0215), located near the headwaters of the Sauk River (07010202) in the Upper Mississippi River Basin in Todd and Douglas Counties, Minnesota. The goal of this TMDL is to quantify the pollutant reductions needed for these lakes to meet State water quality standards for nutrients. The numeric water quality standards for Smith Lake and Osakis Lake, both deep lakes, are a summer average total phosphorus (TP) maximum concentration of 40 ?g/L and 14 ?g/L chlorophyll-a, and greater than 1.4 meter in Secchi depth. The numeric water quality standards for Faille Lake, a shallow lake, are a maximum summer average TP concentration of 60 ?g/L and 20 ?g/L chlorophyll-a, and greater than one meter in Secchi depth. Water quality for all three lakes does not meet deep/shallow lake state standards for nutrient concentrations in the North Central Hardwood Forest (NCHF) ecoregion.

Wenck Associates, Inc.

Minnesota Pollution Control Agency

80

Surface Water
Water Quality & Pollutants
Water Use & Availability
Water Conveyance & Hydraulics
Water Economics

atmospheric deposition
atmospheric depositions
Total Maximum Daily Load
Total Maximum Daily Loads
TMDL
TMDLs
T.M.D.L.
T.M.D.Ls
non-point source
non-point sources
nonpoint source
nonpoint sources
non point source
non point sources
point source
point sources
surface runoff
surface runoffs
agricultural runoff
agricultural runoffs
agricultural run-off
agricultural run off
ag runoff
ag run-off
ag run off
nonpoint source pollution
non point source pollution
non-point source pollution
phosphorus load
phosphorus loads
phosphorus loading
water quality assessment
water quality assessments
water-quality assessment
water-quality assessments
water quality data
water quality modeling
water quality model
water quality standard
water quality standards
watershed assessment tool
watershed assessment tools
water shed assessment tool
water shed assessment tools
water-shed assessment tool
water-shed assessment tools
watershed management
watershed managements
water-shed management
water-shed managements
water shed management
water shed managements
watershed modeling
water-shed modeling
water shed modeling
water quality & pollutants
water quality and pollutants
impaired waters
impaired water
watershed monitors
watershed monitor
watershed monitoring
agricultural water shed
agricultural watershed
agricultural watersheds
ag watershed
W.R.A.P
watershed restoration and protection
WRAP
303(d) list

2010-2019

No

Public Domain

Minnesota Water Research Digital Library