Lake and Dam Committee : Report June 6, 2018

Reported by Michael Caywood

The following is a message from John Tucci, of Lake Savers, as a follow up from their most recent visit, the week of 5/20.
Lake Savers has been using biological treatments along with aeration to improve the health of our lake.

Lake Savers has treated Lake Heritage twice so far in 2018. Once during the week of May 6 and then the week of May 20. Based on the data, it is pretty clear that we caught the lake this year well before the Blue-Green Algae could get going.

The water quality is on par with where we had it last year in 2017 once we got the algae under control. While there is some blue green algae in the water column, it is basically, inconsequential. The cell counts during the week of 5/20 testing are lower than we saw all last season.

There are no visible signs of either Blue-Green Algae or filamentous algae in the main lake or the coves. The bits of green on the surface were all found to be pollen from the trees and not algae.

We have really “upped” our game this year in terms of treatment volumes. In the two treatments, we delivered more than 70,000 gallons of pro-biotic, biological treatment to the lake.

However, due to the recent heavy rains, Phosphorus remains high and is still the main long-term problem that needs to be improved for the lake. The Phosphorus levels are more than high enough to support Blue-Green Algae blooms so if we stopped treating with the Biologicals, it is likely the blooms would start again.

We will be implementing a new Phosphorus Harvesting Technology on the lake as a pilot later this Summer. This will provide a mechanism for physically removing Phosphorus from the lake quickly that should help reduce the need for treatment over time.

Also, we cannot stress enough the importance of continuing the efforts on watershed management and filtration around the lake. The Phosphorus Harvesting and the Watershed work are the two best approaches for getting the lake healthy on its own without the need for such extensive Biological Treatment.

Finally, water clarity has fluctuated between 4 and 4.5 feet. This is significantly better than we started with last year. With the aggressive Biological Treatment and some help from Mother Nature in the form of fewer heavy rains, we are shooting to achieve water clarity of 5 feet or better for most of this Summer.

All-in-all, we are off to a very good start in 2018!