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Deadwood Reservoir
Us-id-deadwood-reservoir.jpg
Location in the United States##Location in Idaho
Location in the United States##Location in Idaho
Deadwood Reservoir
Location in the United States
Location in the United States##Location in Idaho
Location in the United States##Location in Idaho
Deadwood Reservoir
Location in Idaho
Location Valley County, Idaho, U.S.
Coordinates 44°17′38″N 115°38′46″W / 44.294°N 115.646°W / 44.294; -115.646
Type reservoir
Primary inflows Deadwood River
Primary outflows Deadwood River
Catchment area 110.7 sq mi (287 km2)
Basin countries United States
Surface area 3,180 acres (12.9 km2; 5.0 sq mi)
Shore length1 21 mi (34 km)
Surface elevation 5,334 ft (1,626 m)
(full pool)
Columbia River Basin
1 Shore length is not a well-defined measure.

Deadwood Reservoir is a reservoir in the western United States, in Valley County, Idaho. Located in the mountains of the Boise National Forest about 25 miles (40 km) southeast of Cascade, the 3,000-acre (12 km2) body on the Deadwood River is created by Deadwood Dam. The river flows south from the dam and is a tributary of the South Fork of the Payette River. The reservoir and vicinity is commonly used for camping, water skiing, fishing, canoeing, and other outdoor recreation. The full pool surface elevation is just above a mile-high at 5,334 ft (1,626 m) above sea level.

Approved by President Calvin Coolidge in 1928, the isolated site required substantial road building. Construction of the concrete arch dam began in late 1929 and was completed in March 1931.

Plant life

Deadwood Dam Construction
Construction of the dam in 1930
Deadwood Dam (4306998778)
Deadwood Dam in summer 2010
  • Huckleberries
  • Various evergreens (mostly pine trees of one sort or another)

Wildlife

Fish

  • Rainbow trout
  • Kokanee salmon
  • Landlock fall chinook salmon
  • Bull trout
  • Cutthroat trout

Mammals

  • Chipmunks
  • Deer
  • Elk
  • Moose
  • Wolves
  • Black bears
  • Bats

Reptiles

  • Garter snakes
  • Rattle snakes

Birds

  • Bald eagles
  • Blue Grouse
  • Osprey
  • Turkey vulture

Climate

Deadwood Reservoir has a dry summer humid continental climate (Köppen Dsb), with subarctic climate (Köppen Dfc) characteristics. The temperature can get hot in late July and early August. Rain and wind may frequent the area unpredictably. The climate is much like that of other high-mountain lakes in Idaho.

Climate data for Deadwood Lodge, Idaho, 1991–2020 normals: 5948ft (1813m)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 58
(14)
59
(15)
65
(18)
74
(23)
88
(31)
93
(34)
100
(38)
97
(36)
94
(34)
87
(31)
67
(19)
49
(9)
100
(38)
Mean maximum °F (°C) 41.0
(5.0)
46.1
(7.8)
54.4
(12.4)
64.4
(18.0)
75.6
(24.2)
86.5
(30.3)
93.0
(33.9)
91.5
(33.1)
85.4
(29.7)
72.6
(22.6)
55.5
(13.1)
40.3
(4.6)
94.2
(34.6)
Average high °F (°C) 35.4
(1.9)
36.0
(2.2)
42.4
(5.8)
49.3
(9.6)
61.4
(16.3)
69.6
(20.9)
81.7
(27.6)
81.2
(27.3)
72.9
(22.7)
57.0
(13.9)
40.2
(4.6)
31.4
(−0.3)
54.9
(12.7)
Daily mean °F (°C) 21.5
(−5.8)
23.9
(−4.5)
29.5
(−1.4)
35.8
(2.1)
45.7
(7.6)
52.3
(11.3)
60.6
(15.9)
59.9
(15.5)
52.3
(11.3)
41.3
(5.2)
28.4
(−2.0)
20.2
(−6.6)
39.3
(4.1)
Average low °F (°C) 7.6
(−13.6)
11.8
(−11.2)
16.5
(−8.6)
22.3
(−5.4)
30.0
(−1.1)
34.9
(1.6)
39.5
(4.2)
38.5
(3.6)
31.7
(−0.2)
25.5
(−3.6)
16.5
(−8.6)
9.0
(−12.8)
23.6
(−4.6)
Mean minimum °F (°C) −13.2
(−25.1)
−11.6
(−24.2)
−2.2
(−19.0)
9.5
(−12.5)
18.6
(−7.4)
26.8
(−2.9)
30.9
(−0.6)
29.8
(−1.2)
23.1
(−4.9)
14.2
(−9.9)
−4.5
(−20.3)
−14.3
(−25.7)
−17.8
(−27.7)
Record low °F (°C) −22
(−30)
−22
(−30)
−11
(−24)
0
(−18)
11
(−12)
23
(−5)
28
(−2)
24
(−4)
17
(−8)
−4
(−20)
−20
(−29)
−24
(−31)
−24
(−31)
Average precipitation inches (mm) 4.92
(125)
4.66
(118)
4.78
(121)
2.88
(73)
3.09
(78)
2.07
(53)
0.63
(16)
0.56
(14)
1.28
(33)
2.96
(75)
4.26
(108)
7.49
(190)
39.58
(1,004)
Average snowfall inches (cm) 51.1
(130)
43.0
(109)
30.0
(76)
10.6
(27)
3.0
(7.6)
0.4
(1.0)
0.0
(0.0)
0.0
(0.0)
0.2
(0.51)
4.9
(12)
24.0
(61)
49.8
(126)
217
(550.11)
Source 1: NOAA
Source 2: XMACIS2 (records, monthly max/mins & 2000-2020 snowfall/depth)
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