Mean AF/Year*
First Appropriation
2,314
1896
Sand Creek
727
1899
Deadman Creek
Bob Creek Ditch
91
1897
Bob Creek
Columbine Ditch
104
1889
Columbine Creek
Laramie-Poudre Tunnel
14,788
1902
Big Laramie River
6
Skyline Ditch
4,999
1891
West Branch Laramie River
7
Cameron Pass Ditch
137
1882
Middle Fork Michigan Creek
8
Michigan Ditch
2,409
1902
Michigan River
9
Grand River Ditch
17,462
1890
North Fork Colorado River
10
Adams Tunnel
216,570
1935
North Fork Colorado River
11
Moffat Tunnel (includes A.P. Gumlick Tunnel)
52,390
1921
Fraser River tribs: Cabin Ck., Elk Ck., Hamilton Ck., Hurd Ck., Jim Ck., Meadow Ck., Ranch Ck., St. Louis Ck. and Vasquez Ck.; Williams Fork River
12
Berthoud Pass Ditch
664
1902
Fraser River
13
Straight Creek Tunnel
311
1957
Straight Creek
14
Vidler Tunnel
518
1893
Peru Creek
15
Harold D. Roberts Tunnel
58,426
1946
Blue River
16
Boreas Pass Ditch
117
1937
Indiana Creek
17
Hoosier Pass Tunnel
8,375
1930
Blue River tribs: Bemrose Ck., Crystal Ck., Hoosier Ck., McCullough Gulch, Monte Cristo Ck., Silver Ck. and Spruce Ck.
18
Columbine Ditch
1,431
1930
East Fork Eagle River
19
Ewing Ditch
1,027
1880
Piney Creek
20
Wurtz Ditch
2,508
1906
Eagle River tribs: Bennett Ck., S. Fork Bennett Ck., Mitchell Ck., S. Fork Mitchell Ck.
21
Homestake Tunnel
25,286
1952
Homestake Creek and tribs: Fancy Ck., French Ck., E. Fork Homestake Ck., Missouri Ck. and Sopris Ck.
22
Charles H. Boustead Tunnel
52,013
1957
Fryingpan River and tribs: Carter Ck., Chapman Gulch, Cunningham Ck., N. Fork Fryingpan, S. Fork Fryingpan, Granite Ck., Ivanhoe Ck., Lilly Pad Ck., Mormon Ck. and Sawyer Ck.; Roaring Fork River tribs: Hunter Ck., Midway Ck. and No Name Ck.
23
Busk-Ivanhoe Tunnel
5,108
1952
Fryingpan River
24
Twin Lakes Tunnel
40,005
1930
Roaring Fork River and tribs: Brooklyn Gulch, Grizzly Ck., Lincoln Ck., Lost Man Ck., New York Ck. and Tabor Ck.; Fryingpan River tribs: Ivanhoe Ck. and Lyle Ck.
25
Larkspur Ditch
190
1931
Marshall Creek
26
Hudson Branch Ditch
352
1892
Medano Creek
27
Medano Pass Ditch
1,100
1892
Medano Creek
28
Tarbell Ditch
432
1914
Cochetopa Creek
29
Tabor Ditch
30
Weminuche Pass Ditch
31
Map #
South Platte River Basin
1
Wilson Supply Ditch
2
Deadman Ditch
3 4 5
Arkansas River Basin
Rio Grande Basin
Gunnison River Basin
Colorado River Basin
Diversion
Source Stream(s)
703
1910
Cebolla Creek
1,325
1934
Pine River
Pine River-Weminuche Pass Ditch
481
1934
Pine River
32
Williams Creek-Squaw Pass Ditch
240
1937
Williams Creek
33
Don La Font Ditch Nos. 1 & 2
191
1940
East Fork Piedra River
34
Treasure Pass Ditch
214
1922
West Fork San Juan River
35
San Juan-Chama Project
92,789
n/a
Rio Blanco
36
Red Mountain Ditch
98
1945
Mineral Creek
37
Carbon Lake Ditch
256
1954
Mineral Creek
38
Mineral Point Ditch
39
Leon Tunnel
40 41
96
1956
Burrows Creek
1,373
1900
Middle Fork Leon Creek
Divide Highline Feeder Ditch
882
1915
Clear Fork
Sarvis Ditch
760
1911
Service Creek
42
Stillwater Ditch
2,028
1903
Bear River
43
Dome Ditch
300
1893
Dome Creek
44
Redlands Power Canal
502,415
1905
Gunnison River
Source: Colorado Division of Water Resources
Receiving Basin
Transbasin diversions moving water between two of the four major river basins are emphasized in boldface type. * Figure is based upon the period of record available in electronic form for each diversion.
1923 Denver Water files for Blue River water rights
1929 The Great Depression begins
CITIZEN’S GUIDE TO COLORADO’S TRANSBASIN DIVERSIONS
9