Map of Bone Lake 2015 (CLP Treatment)

Map of the Bone Lake treatment CLP 2015.

2014 CLP treatment Bone Lake

Draft: Bone Lake [2628400], Polk County, Dipotassium Salt of Endothall Herbicide Concentration Monitoring Summary, 2014

On May 28 and 29, 2014 eight beds of Potamogeton cripus (curly leaf pondweed‐CLP) totaling 30.43 acres were treated with endothall at a target concentration of 2 ppm. The treatment was found to be effective at reducing the CLP growth that was quantified before treatment, based upon frequency. The frequency from before treatment to after treatment declined 63.6%. Compared to the 2013 post treatment frequency, the 2014 increased slightly from 9.3% in 2013 to 11.3% in 2014. The pretreatment frequency from 2013 decreased in 2014, from 87% in 2013 to 74.6% in 2014, demonstrating a potential long‐term CLP reduction. The native species analysis showed a reduction in the frequency of one species (Potamogeton robbinsii) that was significant. There was an increase in frequency in 9 native species. This supports no adverse effect of the herbicide on native species. A turion density analysis showed a reduction in the mean turion density in all beds from 2013 to 2014. Beds 2‐5 showed a reduction in mean turion density for the fourth straight year. The update in non-treated CLP bed maps was not possible as the CLP never grew close to the surface to allow viewing from the surface.

Endothall Concentration monitoring summary 2013, Bone Lake, Polk County

2013 CLP treatment Bone Lake

The approval letter for the Bone Lake APM Plan.

Bone Lake PI Survey Analysis

Comprehensive approval letter for the mgmt. plan on Bone Lake in Polk County.

Deliverables include GIS maps of areas monitored; aquatic plant and turion survey results (spreadsheets and narrative summary); and a management/treatment summary.