Results for Survey Conducted on September 7th, 2022
Pre-treatment Survey: survey conducted on June 3rd, 2022
Treatment Date: June 28th, 2022
Post-Treatment Survey: To be conducted after treatment to evaluate success.
Treatment Areas (shown in Map 1):
|Area||Size (acres)||Treatment Requirement|
|1B||0.7||Treatment needed. Minor coverage of Eurasian milfoil and brittle naiad.|
|1||6.6||Treatment needed. Moderate coverage of Eurasian milfoil and very minor curly-leaf pondweed. The area had extremely dense native plant growths.|
|2||4.8||Treatment needed. Minor Eurasian milfoil and brittle naiad, dense native plant growth.|
|3||9.0||Treatment needed. Minor Eurasian milfoil, curly-leaf pondweed, and brittle naiad.|
|4||~30.0||Treatment needed, including extension. Minor Eurasian milfoil and brittle naiad, and dense native plant coverage.|
|5||28.0||Treatment needed included extension. Scarce curly-leaf pondweed. Very dense native plant growth.|
|6||2.8||Treat at LZA discretion. Minor Eurasian milfoil and curly-leaf pondweed near shore.|
|7||0.7||Treat small area around boat ramp and around Jackson Point. Dense brittle naiad and moderate Eurasian milfoil.|
|8||2.5||Treatment needed. Minor Eurasian milfoil and brittle naiad.|
|9||2.2||Treatment needed. Minor Eurasian milfoil|
|10||1.5||Treatment needed -Area not shown individually. Moderate to dense Eurasian milfoil at 25-78% coverage, brittle naiad at 30-80% coverage, and curly-leaf pondweed at 10% coverage.|
Map 1: Treatment Area Sites established in 2017
Map 2: Shepaug Dam New Treatment Area (1b) = 0.7 acres
Mid-Season; There was moderate amounts of invasive Eurasian milfoil in this area at between 30-50% coverage, and minor amounts of the invasive brittle naiad at 10% coverage. A series of native aquatic plants were abundant in this area; tape-grass, river pondweed, thin-leaf pondweed, and yellow star grass, This area needs to be treated because of the serious risk of infesting continued fragmentation of milfoil that can affect the rest of the lake if allowed to mature.
Map 3: Treatment Area 1 = 6.6 acres
Mid-Season; This area had differing amounts of Eurasian milfoil going from 10% coverage northerly to 75% coverage at the southern end of treatment area. Very little curly-leaf pondweed was found in this area. There were several dense to extremely dense native species including. Tape-grass, river pondweed, thin-leaf pondweed, yellow star grass, coontail, and elodea, This area needs to be treated.
Map 4: Treatment Area 2 = 4.8 acres
Mid-Season; Eurasian milfoil and brittle naiad were scarce in this treatment area, occurring at 1-2% cover. The area had extremely dense native plant growth including tape grass, river pondweed, flat-stem pondweed, clasping leaf-pondweed, yellow star grass, and coontail. This area needs to be treated.
Map 5: Treatment Area 3 = 9.0 acres
Mid-season; Area 3 had minor amounts of Eurasian milfoil, curly-leaf pondweed, and brittle naiad at 10-30% cover. The same native plants were dominant in this area; tape-grass, yellow star grass, pondweeds. This area needs to be treated.
Map 6: Treatment Area 4 = ~30 acres
Mid-season; This area, including the sandbar, had minor to moderate amounts of Eurasian milfoil and brittle naiad (10-60%). A few sites had minor amounts of curly-leaf pondweed at 10% coverage. There was dense to extremely dense topped out native plant growth with tape-grass, elodea, and yellow star grass dominant. The treatment area should be expanded to include the area in blue. This area needs to be treated.
Map 7: Treatment Area 5 = 28 acres
Mid-Season; Area 5 was dominated by extremely dense and topped out tape-grass and coontail throughout the entire treatment area. Other plants in this area included narrow-leaf pondweed, and flat-leaf pondweed. The mat forming bluegreen algae Lyngbya was found scattered throughout this area. No Eurasian milfoil and only a few curly-leaf pondweed plants were found in this area. Note the extension of the area to be treated as shown in blue. This area need to be treated.
Map 8: Treatment Area 6 = 2.8 acres
Mid-Season; The inner cove area had minor to moderate Eurasian milfoil, curly-leaf pondweed, and brittle naiad (10-50% cover). There was also dense to very dense native plants near shore including tape-grass, flat-stem pondweed, narrow-leaf pondweed, and the both green and bluegreen filamentous algae. Treat at the discretion of the LZA.
Map 9: Treatment Area 7 = 0.7 acres
Mid-Season; Map 9 shows three small treatment areas used in the past. Moderate amounts of Eurasian milfoil were found along the area called Jackson Cove and to its right. Dense brittle naiad was found in the small cove to the left in Map 9. This small area should be treated because of the proximity of the boat ramp in this cove.
Map 10: Treatment Area 8 = 2.5 acres
Mid-Season; This area consists of a smaller area to the left and a larger area to the right inside the cove. The smaller area contained moderate to dense Eurasian Milfoil at 75% cover. The cove contained brittle naiad at moderate density. These areas need to be treated.
Map 11: Treatment Area 9 = 2.2 acres
Mid-Season; This area contained minor to moderate amounts of Eurasian milfoil at 15-60% cover. There were dense to very dense native plant growth in this area. This area needs treatment near shore only.