Little River TWA Assessment 2018, 2019

Purpose

Oconto County and NRCS have selected the Little River watershed to be the next NWQI watershed. The lower 9 miles of the Little River is listed on the States 303(d) list of impaired waterways for Total Phosphorous. Oconto County will utilize the data collected and the selection of an NWQI watershed to develop a 9KE plan for either all of the Little River HUC 10 watershed or for smaller HUC 12 segments. It is currently unknown which HUC is the significant contributor to the Phosphorous impairment to the Little River but it is suspected, based on heavy agricultural land use, that the lower 3 HUC 12's have the largest influence on WQ conditions and the impairment from Phosphorous in the Little River. The project will assess conditions of the Lower 3 HUC 12 watersheds in the Little River in 2018 and the upper 3 HUC 12;s in 2019.

Objective

East District Biologists will seek to collect contemporary WQ data in the Little River Watershed over the next two field seasons. Water Chemistry samples in 2018 will be collected at all HUC 12 pour points with additional sample points located in the Lower 3 HUC 12's to establish a total of 12 water chemistry sites. Additionally 7 agricultural tiles will be sampled in the summer and fall of 2018 and the spring of 2019. Samples will be collected for Total P, TSS, and Ortho P. The 3 parameters will help establish baseline conditions and insight into pre and post BMP implementation in areas of the Little River Watershed. Additionally in the lower 3 HUC 12 areas, 26 fish and habitat stations and 20 macroinvertebrate stations will be selected to assess contemporary conditions. In 2019, ~12 water chemistry sites will be selected continuing with the event data collection at the pour points in the months of March, April, Nov, Dec. The remaining 3 HUC watersheds will be targeted for monitoring including Fish, Habitat, and macro invertebrate sites.

Outcome

Collect contemporary data within the Little River watershed over the next 2 years. Compile data and compete a Watershed Plan update. Utilize data to assist Oconto county and NRCS in directing NWQI funds into areas of HUC 12 watersheds where either Biological, Chemical, or Physical data indicate WQ conditions are impacted by Non-point sources. Establish monitoring sites where trends can be tracked through concentration based sampling by volunteers. It is desired that sites can be established to be revisited following BMP installation to track instream WQ improvements through either biological, chemical, or physical water quality improvements.

Study Design

2018- 12 Water Chemistry sites to include TP, TSS, OrthoP 7 WQ Sites at tile outlets 12 Diatom samples at WQ sites 26 Fish and Habitat Sites 20 Macro Invert sites 2019 12 Water Chemistry sites to include TP, TSS, OrthoP, during spring runoff and 2 event samples. 12 Water Chemistry sites to include TN, NH4 and NO2+NO3 during spring and fall times and one runoff event samples 7 WQ sites at tile outlets will include a spring all parameter sample and then summer and fall Nitrogen series sample event. ~20-30 Fish and Habitat Sites ~20 Macro Invert Sites

Related Reports

Run Project Summary Report
View Umbrella-Projects
View Related-Projects

Targeted Watershed Approach
Effectiveness (BMP, Other)
East_TWA_1_2018
2018
Active
 
Reports and Documents
 
Activities & Recommendations
Monitor to Evaluate Projects
Oconto County and NRCS have selected the Little River watershed to be the next NWQI watershed.
Comprehensive Planning Studies
Monitor EPA SP12 (Measure W)
Little River Watershed, 2 year 040302020404
Monitor Targeted Watershed Area (TWA)
County Land and Water Management Plan
Oconto County and NRCS have selected the Little River watershed to be the next NWQI watershed. The lower 9 miles of the Little River is listed on the States 303(d) list of impaired waterways for Total Phosphorous. Oconto County will utilize the data collected and the selection of an NWQI watershed to develop a 9KE plan for either all of the Little River HUC 10 watershed or for smaller HUC 12 segments.
Grant Awarded
Oconto County and NRCS have selected the Little River watershed to be the next NWQI watershed. The lower 9 miles of the Little River is listed on the States 303(d) list of impaired waterways for Total Phosphorous. Oconto County will utilize the data collected and the selection of an NWQI watershed to develop a 9KE plan for either all of the Little River HUC 10 watershed or for smaller HUC 12 segments.