Reservoir Details
The water temperature of the lake ranges from about 86 °F (30 °C) during the summer months to under 40 °F (4 °C) during the winter months. In the summer, at a depth of 30 feet (9.1 m), the water temperature is about 10 °F (5.56 °C) cooler than at the surface. Surface water temperature is usually about 60 °F (16 °C) during spring and fall months.
As of 2001, the lakes' standard surface level was at 1,039 ft (317 m) above sea level, the maximum depth of the lake was 58 ft (18 m), with an average depth of 15.4 ft (4.7 m). The top of the Lake Thunderbird Dam was (and is) 1,071 ft (326 m) above sea level, 32 ft (9.8 m) above the standard level of the lake. The lakes' surface area was 5,349 acres (21.65 km2). The volume of the reservoir (at this standard depth) was 105,838 acre feet (130,549,000 m3). The total watershed area feeding the lake is 163,840 acres (663.0 km2). The rate at which sediment was accumulating in the lake is 393 acre feet (485,000 m3) a year. The reservoir had lost a total of 13,762 acre feet (16,975,000 m3) of capacity since its completion in 1965. The shoreline length was 60 miles (97 km). The capacity of the reservoir, the maximum depth, and the average depth had all decreased since 1965. The following table gives original statistics for the reservoir from 1965.
| Full Reservoir Capacity | Standard Capacity | Minimum Capacity |
|---|---|---|
| 196,260 acre feet (242,080,000 m3) | 119,600 acre feet (147,500,000 m3) | 13,640 acre feet (16,820,000 m3) |
| Maximum depth 68 feet (21 m) | Maximum depth 58 feet (18 m) | Maximum depth 29 feet (8.8 m) |
| Surface elevation 1,049 feet (320 m) above sea level | Surface elevation 1,039 feet (317 m) above sea level | Surface elevation 1,010 feet (310 m) above sea level |
Read more about this topic: Lake Thunderbird
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