Technical data on the FRLC projects
|
Tannery Pond |
Ashland |
Dam type |
Gravity Dam |
Gravity Dam |
Dam material |
Laid fieldstones |
Concrete capped granite blocks |
Dam length |
125ft |
80ft |
Dam height |
6ft |
12ft |
Spillway type |
Overflow weir w/flashboards |
Overflow weir w/flashboards |
Year constructed |
1913 |
1925 |
Impoundment surface area |
8 acres |
12 acres |
River |
Millers |
Squam |
Drainage area |
49 square miles |
67 square miles |
Average flow |
92 cfs |
88 cfs |
Average annual minimum flow |
4 cfs |
15cfs |
Bypass reach length |
760ft |
320ft |
Minimum bypass flow |
21 cfs |
32 cfs |
Installed capacity |
189kW |
84kW |
Turbine type |
Unit 1 – 38” Todney Hunt Type 80, Unit 2 – 48” Leroy Somners Semi-Kaplan |
Unit 1 – 36” Leroy Somners Semi-Kaplan |
Generator type |
Unit 1 – 1800 rpm induction generator, Unit 2 – 900rpm induction generator |
Unit 1 – 1800 rpm induction generator |
Hydraulic capacity |
230cfs |
79cfs |
Average annual generation |
510,000kWh/yr |
420,000kWh/yr |
Regulatory status |
FERC exemption from licensing |
FERC exemption from licensing |