LMAB 08/01/2018 Minutes - Laserfiche WebLink

Home Browse Search

water body wholly or partially within the City except for two of them. We have been trying to work with residents to gain access to these lakes to be able to get a boat in the water to manage it. We recently received approval for entry into Plaza Oval to be able to treat water hyacinth, an exotic species of floating plant that grows and spreads rapidly and has covered about one-third of the lake. Working with our contractors, Applied Aquatic, they have completed two treatments. There is also a species of sedge that is not in any other lakes in the City called Cyperus prolifer. It will be difficult to control. We now also have access to Lake Marie as well as Lake Lotus because it will have a City retention constructed next to it. All the Quintuplet Chain has been recently sprayed, and lots of hydrilla treatments are ongoing City-wide. Lake Griffin received a combination diquat/endothall treatment to target both hydrilla and southern naiad. Secret Lake received a perimeter treatment for hydrilla. South Triplet and Lake Kathryn received a perimeter hydrilla treatment, and a full lake hydrilla treatment is planned for Lake Kathryn this winter. The history of Lake Kathryn is one of the reasons we changed our management program which was partly due to the expense the residents had encountered to manage the hydrilla problem. We are also going to be increasing our carp stocking rates on the Chain and putting more carp in Lake Kathryn. We are waiting on a contractor that will be installing a new fish barrier downstream at the Laura Street Weir downstream of the Lake Kathryn Estates canal that the entire Triplet Chain drains through. That area had a fish screen historically, but it did not meet the Florida Fish and Wild Life Conservation Commission requirements; the spacing and bars were too large and allowed small fish to come through. It was removed about two years ago and now that we have management authority of the water body we will install our own screen that meets the requirements. It will be installed in addition to a telemetry system that will be constructed within the next month. We will be able to monitor the flow rates that are discharging through Gee Creek which will give us more information about lake levels and possible flood conditions. We have already been analyzing historic base data and have put together a weir operating plan that was authorized by the St. Johns River Water Management District. We discussed at our last meeting, in the case of a hurricane coming, we can lower the weir and allow upstream water levels to draw down and drain beforehand. This way we will not have so much water pooling in the system before the storm comes. First Telemetry, then install the fish screen and then the carp. This is a process that we will need to work through. Screens will also be replaced at Seminola and Ivy Road which separates North Triplet from Lake Kathryn. The old screens are unmovable, and create a maintenance issue when debris collects. We will be able to pull the new fish screens in advance prior to a storm. This also will be done on Lake Griffin. We are also working with our water quality group, Geosyntec. They come on a quarterly basis and get water quality samples to track water chemistry. The most recent currently updated report is posted on our web site under www.Casselberry.org/lakes. This information will be submitted in our annual NPDES report which is National Pollutant Discharge Elimination System annual report that is required by the State. It includes all aspects of the storm water function such as: streets debris we remove, storm system improvements, environmental education, staff training, everything related to our storm water management program. We are proving to the State that we are meeting and exceeding their basic requirements. Our new permit that was issued this 2