Wyoming State Water Plan, Wyoming Water Development Office
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Bear River Basin Water Plan
Technical Memoranda

SUBJECT: Appendix D
Key Structures and Diversions
HILLIARD WEST SIDE DIVERSION

PREPARED BY: Bear River Basin Planning Team

DATE: August 7, 2000









Diversion Description:  The diversion gate structure consists of a concrete headwall 
with a single 5 foot steel slide gate.  Water is diverted from the Bear River approximately 
150 yards upstream of the gate structure.


Hilliard West Side diversion structure




Diversion Location:	Diversion is on the East Fork of the Upper Bear in Wyoming.  
Irrigated lands are located in Wyoming as shown in the location map hereafter.

			

Latitude  	N   40° 59' 45.3"	

Longitude  	W  110° 52'  10.3"





Conveyance Description: Open Channel Canal, approximately 31,680 feet in length.1


Direct Flow Water Rights:2





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


11-27-1891 
6276
Irrigation 
160
2.28 
2.28 



11-27-1891 
6276
Irrigation 
160
2.28
4.56 



11-27-1891 
6276
Irrigation 
160
2.28
6.84 



11-27-1891 
6276
Irrigation 
160
2.28
9.12 



11-27-1891 
6276
Irrigation 
120
1.71 
10.83 



11-27-1891 
6276
Irrigation 
160
2.28
13.11 



11-27-1891 
6276
Irrigation 
160
2.28 
15.39 



11-27-1891 
6276
Irrigation 
160
2.28 
17.67 



11-27-1891 
6276
Irrigation 
160
2.28 
19.95 



11-27-1891 
6276
Irrigation 
40
.57 
20.52 



11-27-1891 
6276
Irrigation 
40
.57 
21.09 



11-27-1891 
6276
Irrigation 
120
1.71 
22.80 



11-27-1891 
6276
Irrigation 
140
2.00 
24.80 



11-27-1891 
6276
Irrigation 
150
2.14 
26.94 



11-27-1891 
6276
Irrigation 
80
1.14 
28.08 



11-27-1891 
6276
Irrigation 
160
2.28 
30.36 



11-27-1891 
6276
Irrigation 
155
2.21 
32.57 






Bear River Compact:  Although the Hilliard West Side Diversion is located in Utah, 
the Bear River Compact acknowledges Wyoming's right to administer Hilliard West Side Canal 
water rights.   Article X, Paragraph "B"  of the Compact specifically states: 

 

"B.  All interstate rights shall be administered by the state in which the point of diversion 
is located and during times of water emergency, such rights shall be filled from the allocations 
specified in article IV hereof for the section in which the point of diversion is located, with 
the exception that the diversion of water into the Hilliard East Fork Canal, Lannon Canal, Lone 
Mountain Ditch, and Hilliard West Side Canal shall be under the administration of Wyoming. During 
times of water emergency these canals and the Lone Mountain Ditch shall be supplied from the 
allocation specified in article IV for the Upper Wyoming section diversions."



Associated Storage Rights:





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


Whitney
Hilliard West Side
508.4
100%




Irrigation Practices:  Land is all flood irrigated. 3 


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: 40%


Application Efficiency: 55%


Overall Diversion Efficiency: 22%







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 entirely to irrigate meadow grasses, primarily 
Timothy, Meadow Foxtail, etc.3


Return Flows:Excess return flow is primarily captured in Sulphur Creek Reservoir. 


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



	
		Month
      (after initial Diversion)	 Percent of Return
		0			50%
		1			25%
		2			15%
		3			10%
					100%







click to enlarge


Other Operational Information:   Hilliard's growing system is typically mid-June to mid-August.3


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 6,1999.

    

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






Monthly Diversion Records






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
74
2.4
146.8
794
26.5
1574.9
1059
34.2
2100.5
249
8.0
493.9
605
20.2
1200.0


1972
153
4.9
303.5
872
29.1
1729.6
553
17.8
1096.9
145
4.7
287.6
375
12.5
743.8


1973
0
0.0
0.0
595
19.8
1180.2
942
30.4
1868.4
414
13.4
821.2
296
9.9
587.1


1974
71
2.3
140.8
789
26.3
1565.0
712
23.0
1412.2
204
6.6
404.6
181
6.0
359.0


1975
69
2.2
136.9
385
12.8
763.6
704
22.7
1396.4
364
11.7
722.0
399
13.3
791.4


1976
108
3.5
214.2
747
24.9
1481.7
770
24.8
1527.3
219
7.1
434.4
136
4.5
269.8


1977
307
9.9
608.9
548
18.3
1086.9
74
2.4
146.8
125
4.0
247.9
121
4.0
240.0


1978
17
0.5
33.7
651
21.7
1291.2
874
28.2
1733.6
227
7.3
450.2
228
7.6
452.2


1979
358
11.5
710.1
815
27.2
1616.5
684
22.1
1356.7
59
1.9
117.0
80
2.7
158.7


1980
27
0.9
53.6
534
17.8
1059.2
912
29.4
1808.9
150
4.8
297.5
441
14.7
874.7


1981
70
2.3
138.8
690
23.0
1368.6
808
26.1
1602.6
114
3.7
226.1
47
1.6
93.2


1982
106
3.4
210.2
844
28.1
1674.0
794
25.6
1574.9
80
2.6
158.7
531
17.7
1053.2


1983
531
17.1
1053.2
257
8.6
509.8
119
3.8
236.0
1049
33.8
2080.7
200
6.7
396.7


1984
0
0.0
0.0
224
7.5
444.3
715
23.1
1418.2
79
2.5
156.7
30
1.0
59.5


1985
83
2.7
164.6
832
27.7
1650.2
780
25.2
1547.1
374
12.1
741.8
222
7.4
440.3


1986
48
1.5
95.2
1113
37.1
2207.6
922
29.7
1828.8
100
3.2
198.3
434
14.5
860.8


1987
454
14.6
900.5
926
30.9
1836.7
548
17.7
1086.9
103
3.3
204.3
57
1.9
113.1


1988
884
28.5
1753.4
994
31.5
1872.4
508
16.4
1007.6
168
5.4
333.2
201
6.7
398.7


1989
494
15.9
979.8
960
32.0
1904.1
836
27.0
1658.2
92
3.0
182.5
81
2.7
160.7


1990
494
15.9
979.8
968
32.3
1920.0
836
27.0
1658.2
92
3.0
182.5
61
2.0
121.0


1991
91
2.9
180.5
672
22.4
1332.9
904
29.2
1793.1
76
2.5
150.7
423
14.1
839.0


1992
673
21.7
1334.9
902
30.1
1789.1
326
10.5
646.6
160
5.2
317.4
61
2.0
121.0


1993
87
2.8
172.6
732
24.4
1451.9
860
27.7
1705.8
202
6.5
400.7
609
20.3
1207.9


1994
232
7.5
460.2
1027
34.2
2037.0
329
10.6
652.6
4
0.1
7.9
32
1.1
63.5


1995
59
1.9
117.0
610
20.3
1209.9
983
31.7
1949.8
280
9.0
555.4
636
21.2
1261.5


1996
237
7.6
470.1
791
26.4
1568.9
1017
32.8
2017.2
82
2.6
162.6
319
10.6
632.7


1997
131.8
4.3
261.4
847.6
28.3
1681.2
1136
36.6
2253.2
335.6
10.8
665.7
755
25.2
1497.5


1998
8.5
0.3
16.9
779.6
26.0
1546.3
1074.7
34.7
2131.6
55.8
1.8
110.7
370.2
12.3
734.3


1999
30
1.0
59.5
640
21.3
1269.4
909
29.3
1803.0
255
8.2
505.8
175
5.8
347.1





AVERAGES


6.6
403.3


24.7
1469.8


24.1
1483.4


6.5
400.6


9.3
554.4



Notes:

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











To the Bear River Basin Plan Water Plan