Wyoming State Water Plan, Wyoming Water Development Office
Rafting on Snake River Lake Marie, Snowy Mountains Wyoming Wind River Range picture

Bear River Basin Water Plan
Technical Memoranda

SUBJECT: Appendix D
Key Structures and Diversions
EVANSTON WATER DITCH

PREPARED BY: Bear River Basin Planning Team

DATE: August 7, 2000












Diversion Description: The headgate structure consists of a concrete headwall with a 48-inch 
wood slide gates.   The south gate and outlet ditch has been abandoned.  The north gate 
feeds into a 48-inch squash culvert through the dike.  The river is diverted using wood 
planks supported on railroad ties driven vertically into the ground. 



Evanston Ditch Headgate





Diversion Location: Diversion is on the Upper Bear in Wyoming as shown on the location map 
hereafter.

					

Latitude      	N   41° 13' 09.3"	

Longitude     	W 110° 53'  54.3"





Conveyance Description: Open channel canal, approximately 47,520 feet in length.1




Direct Flow Water Rights:2





Priority Date 
Permit 
Number		
Permitted Use 
Permitted 
Acres		 
Flow 
(CFS)		
Cumulative 
(CFS)		 
Comments


03-28-1875 
Terr
Irrigation 
501.19
7.16 
7.16 



03-28-1875 
Terr
Irrigation 
20
0.28 
7.44 



03-28-1875 
Terr
Irrigation 
27.92
0.39 
7.83 



-1888 
Terr
Irrigation, Domestic, Storage 
110
1.57 
9.40 



06-29-1906 
1569E
Irrigation, Domestic, Storage 
40
0.57 
9.97 



09-22-1915 
3520E
Irrigation, Domestic, Storage 
308
4.41 
14.38 



09-22-1915 
3520E
Irrigation, Domestic, Storage 
20.79
0.30 
14.68 



09-22-1915 
3520E
Irrigation, Domestic, Storage 
115
1.64 
16.32 



09-22-1915 


Supplemental Supply, Domestic, Storage 


33 

 
East (Sulphur Creek Canyon Springs)


09-22-1915 
3520E
Irrigation, Domestic, Storage 
242
2.46 
19.77 



09-22-1915 


Supplemental Supply, Domestic, Storage 


232.00 

 
East (Sulphur Creek Canyon Springs)






Associated Storage Rights:





Reservoir
Shareholder
Volume 
(Acre-ft)		
Est. % of Shares Used this Diversion3
Comments


Sulphur Creek
Duane Carpenter
263
100%



Sulphur Creek
Lowham Ranch LTD
444
70%



Sulphur Creek
Eldon Perkins
11
100%



Sulphur Creek
Ellsworth Pexton
102
100%



Sulphur Creek
Fred Stahley
219
100%



Sulphur Creek
Ralph Stahley
16
100%



Sulphur Creek
James Trout
3
100%



Sulphur Creek
Wyoming State Hosp.
478
100%











click to enlarge



Irrigation Practices:  Land is all flood irrigated.3 


Estimated Diversion Efficiency:


Estimated Diversion Efficiency: Canal losses are relatively high due to porous nature of soils in 
the higher reaches of the Upper Bear.  




Calculated Diversion Efficiency = Conveyance Efficiency X Application Efficiency:





Conveyance Efficiency: 65%


Application Efficiency: 55%


Overall Diversion Efficiency: 36%







Conveyance efficiency is estimated by total length of main canal. Application efficiency 
for flood irrigation and sprinkler irrigation is estimated at 55% and 85% respectively.






Crop Types / Consumptive Use:  Water is used primarily to irrigate mixed meadow grasses, 
primarily Meadow Foxtail, Redtop, etc.  There is a some alfalfa in the Yellowcreek area.  
They rely on reservoir water for their second crop. 


Return Flows:  Return flow is primarily intercepted by the Rocky Mountain & Blythe Canal.


The following return flow pattern was adopted for modeling in this study are as follows: 



	
		Month
      (after initial Diversion)	 Percent of Return
		0			70%
		1			20%
		2		        10%
                3                        0%
				       100%


	


References:

    

  1. 	USDA -Soil Conservation Service Economic Research Service-Forest Service in Cooperation 
with the States of Idaho, Utah, Wyoming, Irrigation Conveyance Systems, Working Paper for 
the Bear River Basin Type IV Study, Idaho-Utah-Wyoming, April 1976

    

  2. 	Water rights summary obtained from State Engineer Interstate Reglist - revised April 14, 
1999

    

  3. 	Irrigation practices based on field investigation and interview with Mr. Don Shoemaker, 
Water Hydrographer-Commissioner  -  November 12,1999.

    

  4. 	State of Utah Natural Resources, Water Budget Studies - Utah, Bear River Study Area, 
September 1994.






Monthly Diversion Records

Evanston Water Ditch






YEAR
MAY
JUNE
JULY
AUGUST
SEPTEMBER



Total of Daily Ave for Month
Average
CFS		
Monthly Total
Ac-Ft		
Total of Daily Ave for Month
Average
CFS		
Monthly Total
Ac-Ft		
Total of Daily Ave for Month
Average
CFS		
Monthly Total
Ac-Ft		
Total of Daily Ave for Month
Average
CFS		
Monthly Total
Ac-Ft		
Total of Daily Ave for Month
Average
CFS		
Monthly Total
Ac-Ft



*1970
































1971
0
0.0
0.0
948
31.6
1880.3
813
26.2
1612.6
744
24.0
1475.7
228
7.6
452.2



1972
66
2.1
130.9
868
28.9
1721.7
581
18.7
1152.4
657
21.2
1303.1
0
0.0
0.0



1973
86
2.8
170.6
1041
34.7
2064.8
589
19.0
1168.3
589
19.0
1168.3
30
1.0
59.5



1974
55
1.8
109.1
1049
35.0
2080.7
566
18.3
1122.6
517
16.7
1025.5
97
3.2
192.4



1975
57
1.8
113.1
677
22.6
1342.8
725
23.4
1438.0
734
23.7
1455.9
174
5.8
345.1



1976
1
0.0
2.0
853
28.4
1691.9
772
24.9
1531.2
331
10.7
656.5
355
11.8
704.1



1977
235
7.6
466.1
619
20.6
1227.8
266
8.6
527.6
105
3.4
208.3
89
3.0
176.5



1978
134
4.3
265.8
691
23.0
1370.6
657
21.2
1303.1
296
9.5
587.1
214
7.1
424.5



1979
192
6.2
380.8
698
23.3
1384.5
531
17.1
1053.2
321
10.4
636.7
135
4.5
267.8



1980
0
0.0
0.0
349
11.6
692.2
572
18.5
1134.5
338
10.9
670.4
220
7.3
436.4



1981
3
0.1
6.0
411
13.7
815.2
433
14.0
858.8
393
12.7
779.5
197
6.6
390.7



1982
0
0.0
0.0
508
16.9
1007.6
480
15.5
952.1
404
13.0
801.3
218
7.3
432.4



1983
0
0.0
0.0
0
0.0
0.0
649
20.9
1287.3
171
5.5
339.2
5
0.2
9.9



1984
0
0.0
0.0
238
7.9
472.1
317
10.2
628.8
328
10.6
650.6
108
3.6
214.2



1985
135
4.4
267.8
419
14.0
831.1
445
14.4
882.6
332
10.7
658.5
199
6.6
394.7



1986
0
0.0
0.0
300
10.0
595.0
316
10.2
626.8
348
11.2
690.2
65
2.2
128.9



1987
350
11.3
694.2
356
11.9
706.1
443
14.3
878.7
197
6.4
390.7
32
1.1
63.5



1988
318
10.3
630.7
590
19.7
1170.2
530
17.1
1051.2
291
9.4
577.2
143
4.8
283.6



1989
534
17.2
1059.2
589
19.6
1168.3
553
17.8
1096.9
484
15.6
960.0
162
5.4
321.3



1990
311
10.0
616.9
609
20.3
1207.9
491
15.8
973.9
444
14.3
880.7
336
11.2
666.4



1991
193
6.2
382.8
592
19.7
1174.2
483
15.6
958.0
473
15.3
938.2
317
10.6
628.8



1992
488
15.7
967.9
609
20.3
1207.9
437
14.1
866.8
271
8.7
537.5
138
4.6
273.7



1993
55
1.8
109.1
442
14.7
876.7
483
15.6
958.0
375
12.1
743.8
178
5.9
353.1



1994
320
10.3
634.7
496
16.5
983.8
452
14.6
896.5
392
12.6
777.5
176
5.9
349.1



1995
0
0.0
0.0
278
9.3
551.4
347
11.2
688.3
387
12.5
767.6
185
6.2
366.9



1996
196
6.3
388.8
573
19.1
1136.5
479
15.5
950.1
419
13.5
831.1
241
8.0
478.0



1997
62.7
2.0
124.4
346.3
11.5
686.9
487
15.7
966.0
373
12.0
739.8
71.8
2.4
142.4



1998
108
3.5
214.2
167.7
5.6
332.6
412.6
13.3
818.4
426.5
13.8
846.0
241
8.0
478.0



1999
4
0.1
7.9
313
10.4
620.8
452
14.6
896.5
362
11.7
718.0
149
5.0
295.5







AVERAGES


4.3
267.0


18.0
1069.0


16.4
1009.6


12.8
786.7


5.4
321.7




Notes:

*1. No published records are available for this diversion 1970

2. Evanston Water Ditch is one of the first regulated. It utilizes approximately
50% Sulphur Creek storage water from July 1 to mid-September.








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