Laserfiche WebLink
GRASS LAKE WATER MANAGEMENTN ORGANIZATION -JULY 23, 2009 5 <br />Two pre-construction samples were taken two weeks apart. The next two will be in six <br />months to give surface water a chance to percolate down 50 feet and migrate laterally to <br />one of the wells constructed. There is a written sampling analysis plan and procedure <br />with equipment to be used. Nash will see that Board members receive a copy of the plan. <br />Kelsey asked if there is a long-term goal for continued testing. Nash stated that it would <br />be beneficial to do an annual report and build good data from multiple years. <br />Root moved, Kelsey seconded a motion to fund this well monitoring project in the <br />amount of $1,425, as requested, taking the funds from the GLWMO reserves. <br />Discussion: <br />Root asked if the impact to ground water from road salt is known. Aichinger stated that <br />data is available on surface water, but the impact to ground water is less known. There is <br />no indication that the use of road salt is impacting drinking water from ground water <br />wells. <br />Vote: Ayes - 4 Nays - 0 <br />Chair Eckman again recused herself because of her ties with Ramsey Conservation <br />District. <br />E Lake Owasso Study <br />E-1 Recommendations <br />Barr Engineering undertook additional monitoring in the shallow portions to get better <br />information on the mixing dynamics of phosphorous concentrations. Charlie Pond in <br />Central Park was studied to see if the wetlands are the source of phosphorous as the study <br />indicates. There is carp in the Central Park wetlands and Lake Bennett. The impacts of <br />carp were discussed and the potential to add a lot of phosphorous to the system. An alum <br />treatment is recommended in Lake Bennett. The public perception is wetland treats <br />storm water, and it is important to get a handle on the loading coming out of the wetland. <br />It is also important to address the abundance of curly leaf pond weed as one of the Best <br />Management Practices (BMP) to help maintain long-term water quality in Lake Owasso. <br />Research shows that from one to five pounds of phosphorous can be added per acre from <br />curly leaf pond weed. It is a significant source. <br />Ferrington stated that if all the data is not available about phosphorous release, it will be <br />difficult to adopt a final strategy to address the problem and sell that strategy to the <br />public. <br />Sobiech stated that a treatment program for curly leaf pond weed would be four years. A <br />