Beginning in 2010, the Great Lakes Sediment and Nutrient Reduction Program (GLSNRP) began receiving funding through the Great Lakes Restoration Initiative. Each year (except 2015), the program has funded a new set of projects that are typically 3-4 years in duration. Between 2010 and 2018, GLSNRP funded 105 projects across the Great Lakes basin.
Many projects funded between 2014 and 2018 are still underway; however, projects funded between 2010 and 2013 are complete. Between 2010 and 2013, a little over $10M was used to fund 54 projects across the Great Lakes basin. The projects reduced sediment loading by an estimated 1.2M tons and total phosphorus by an estimated 1.24M pounds over the expected life of the installed practices. Of the 54 projects, 28 took place in the Lake Erie basin. Projects in the Lake Erie basin reduced sediment loading by an estimated 756,099 tons and total phosphorus by 647,148 pounds, also over the life of the practices. Commonly used calculation methods, including the Region 5 model and STEP-L are used to determine estimated reductions of sediment and phosphorus.
For projects funded between 2014 and 2018, final reductions are difficult to capture since projects are continually installing new practices. In order to determine phosphorus reductions for active projects, it is helpful to look at the proposed reductions since projects often meet or exceed their proposed targets.