IRRIGATIO.\ 



103 



near Culbertson, mean, 24,200. 



acre-feet, 

 slopes; volume, 



34,000 cubic 



7,000; Wolf Creek at Wolf Point, mean, G.700: Big Muddy, 



Data for Complete Project. 

 Little Porcupine Unit — 



Storage reservoir: Area, 390 acres; capacity, 3,900 

 Storage dam: Type, earth with brush mattress on 

 yards of earth; 9,400 cubic yards brush mattress. 



Diversion dam: Little Porcupine — Type, concrete weir on rock-filled timber crib 

 base; maximum height, 4 feet; length, 150 feet. 



Length of canals: 1 mile, with capacity from 50 to 300 second-feet; 13 miles, 

 with capacity of less than 50 second-feet. 



Irrigable area: 2,000. 

 Poplar River Unit — 



Diversion Dam "B" canal: Type, concrete weir on rock-filled timber crib base; 

 maximum height, 4 feet; length, 300 feet. 



Length of canal: 11 miles, with capacity over 50 second-feet; 22 miles, with 

 capacity less than 50 second-feet. 

 Dike: Length, 700 feet. 

 Poplar River "C" canal: 18 

 feet; 48 miles, with capacity less 

 "A" canal: Dimensions not 

 Irrigable area: 28,000 a;cres. 

 Porcupine Unit — 



Diversion dam: Dimensions not determined. 

 Length of canal: 7 miles; 70 second-feet capacity. 

 Irrigable area: 4,000 acres. 

 Muddy Unit — ' 



Storage reservoirs: Wolf Creek; capacity, 4,550 acre-feet; 

 5,300 acre-feet. 



Wolf Creek — Type, earth; contents, 85,300 

 contents, 75,600 cubic yards. 

 3: dimensions not determined. 

 16,000 acres. 

 Unit— 

 on Missouri River. 



miles of canal, with 

 than 50 second-feet, 

 determined. 



capacity of over 50 second- 



Big 



Big 



Storage dams: 

 Creek — Type, earth; 



Diversion dams: 



Irrigable area: 

 Missouri River 



Headworks 



Smoke Creek, capacity, 

 cubic yards. Smoke 



Length of canal 

 Siphon: Under 

 Iri-igable area: 



100 miles, with capacity 

 Milk River, -500 feet long. 

 84,000 acres. 



of 625 second-feet at headworks. 



Main Canal Looking South, Loiver Yellowstone Project. 



