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

Powder/Tongue River Basin Water Plan
Technical Memoranda

SUBJECT: Appendix A
Irrigation Diversion Operation and Description
ROCK CREEK

PREPARED BY: HKM Engineering Inc.

DATE: March 2002







ROCK CREEK



HALLIE DITCH DIVERSION

LAKE DESMET (M&M) DITCH DIVERSION

MOWRY BASIN DITCH DIVERSION 

PRINCE ALBERT DITCH DIVERSION







ROCK CREEK DRAINAGE

INTRODUCTION



BACKGROUND


Rock Creek flows out of the east slope of the Bighorn Mountains, beginning on hydrographers. maps as 
the north and south forks of Rock Creek. Three other, smaller tributaries (Sayles, Johnson, and Sand 
creeks) join it before it terminates in Clear Creek, which in turn flows into the Powder River. The Powder 
River crosses the Montana state line north of Spotted Horse, Wyoming. 


CHARACTERISTICS


Rock Creek travels steep slopes in its course, much of which are characterized by mountainous seams and 
the subsurface ducts. As a result, water commissioners estimate that losses (or .shrinkage.) to releases 
from Willow Park and Cloud Peak reservoirs at 60 percent in a dry year to 40 percent in a wet year. (This 
reservoir water, used extensively in Rock Creek, is transferred to the North Fork of Rock Creek through 
the Rock Creek & Piney Ditch Co. Canal.)


USAGE


Rock Creek.s diversions are entirely devoted to agricultural irrigation.


Regulation


Water commissioners estimate that regulation is imposed on Rock Creek drainage diversions with the 
following timing:





Wet Year
Average Year
Dry Year


mid-August
mid-July
mid-June






Even under regulation, Johnson Creek flows 1-2 cfs.


Agriculture


Growers in the Rock Creek drainage tend to devote approximately 60 percent of their lands to alfalfa, 40 
percent to grass hay. They have the following irrigation practices:


Percentage of lands served by irrigation type:




Flood
Gated Pipe
Sprinklers


25
60
15






The typical irrigation season runs from April 15-May 1 (depending on whether the spring runoff is 
delayed by colder weather) to early/mid October (depending on when the first snows fall and the ground 
freezes). Approximately 10 percent of the irrigators using Rock Creek water (the biggest users) practice 
post-season irrigation, though they usually do not use their entire right to do so.


Double Appropriation


Irrigation water rights with priority dates of March 1, 1945 or earlier are entitled to an additional 1cfs per 
70 acres under Wyoming.s surplus water statutes. Whenever the supply in a stream exceeds to amount 
required to satisfy all existing appropriations established prior to March 1, 1985, the stream is said to be 
in an excess flow condition and water right holders with priorities between March 2, 1945 and March 1, 
1985 may use an additional 1 cfs for each 70 acres irrigated.


In Rock Creek, this practice is limited primarily by the condition of ditches. Many of the ditches are not 
capable of carrying all of the water an irrigator could use.





% of appropriation
% of ditches in drainage capable of flow


200
20


150
60


100-150
90


0-100
90






Permitted Uses


Permits granted for water appropriation are granted for specific uses. The following pages contain tables 
of permits and their associated uses. The following table provides a key to those uses: 






Code
Use


Chem
Chemical


Com
Commercial


Cul
Culinary


D
Domestic


Drl
Drilling


Eng
Steam Engines


Fire
Fire Protection


Fish
Fish Propogation


F.C.
Flood Control


I
Irrigation


Ind
Industrial


I.F.
Instream Flow


Mech
Mechanical


Mfg
Manufacturing


Mil
Milling


Min
Mining


Misc
Miscellaneous


Mun
Municipal


Oil
Oil Refining or Production


P.C.
Pollution Control


Power
Power Development


R.R.
Railroad


Rec
Recreational


Ref
Refining


Res. Supply
Supply Facility for a Reservoir


S
Stock


T
Transportation







WATER RIGHTS


Two water rights summary tables are provided for each diversion serving irrigation referenced here. The 
first, included in the body of the diversion synopsis, refers to the rights on record with the State 
Engineer.s Office and is derived from that office.s Tabulation of Adjudicated Surface Water Rights of the 
State of Wyoming, Water Division Number Two (Oct. 1999).


Because this rights summary is pulled directly from the SEO Tab, the rights cited follow the SEO.s 
priority order:





Hierarchy
Format of right
Example


1
Day, Month, Year
05-15-1884


2
Month and Year
05-00-1884


3
Specified Season and Year
Spring 1884


4
Year Only
1884


5
Before Year
Before 1884







Board orders or court orders may also establish a specific priority.


Irrigated Lands Water Rights Database


The second table, which follows the diversion synopsis, is taken from the irrigated lands water rights 
database developed for the basin plan. It can be used as a reference with the following caveats: It only 
lists water rights associated with the irrigated lands polygons mapped by HKM.  The table does not 
include nonirrigation rights devoted to reservoir supply, municipal, fish propagation, etc. The rights on 
this table are associated only with those irrigated lands identified through the course of this study, both 
actively irrigated and currently idle.






Column Heading Key


PerNo
Permit Number
"Terr" denotes a territorial right.


PerSfx
Permit Suffix
D = direct flow


E = enlargement


R = reservoir


Facility Name
Parantheses denote the former means of conveyance for the water right.



Unit
Flow or volume
CFS = cubic feet per second


AF = acre-feet


GPM = gallons per minute



SupTyp
Supply Type
OS = original supply


SS = supplement supply, for lands having an original supply from another source.


Sec = secondary supply, for water stored in a reservoir



Status
Status of adjudication
Adj = adjudicated


Una = unadjudicated


Source
Source water
Parantheses denote the permit number of the related storage right.





Schematic of Rock Creek stream and diversions:















KEY DIVERSIONS





Diversion:
HALLIE DITCH DIVERSION


Hallie Ditch headgate



Date
18 Oct. 2000



Diversion Description:
Headgate consists of a single, 4.5 x 4.8-foot steel gate in steel slides 
operated with a Waterman-type screw, mounted in a concrete headwall. 
The headgate is in good condition.



Diversion Location:	
The Hallie Ditch diversion is located on the main stem of Rock Creek, 
between the confluences of the South and North forks and the of Rock 
and Sayles creeks. 










Headgate:


Lat.
Long.


N 44° 27' 16.0''
W 106° 52' 11.3''





Flume:


Lat.
Long.


N 44° 27' 16.0''
W 106° 52' 9.4''






Hallie Ditch flume




Conveyance Description:
Open channel canal, approximately 6.1 mi. long.



Direct Flow Water Rights:
The summary for direct flow rights follows:









Permit
Priority Date
Permitted Use
Acres
Flow (cfs)
Cumulative (cfs)



Terr.
04-10-1886
I
5.00
0.07
0.07


Terr.
04-10-1886
I
160.00
2.28
2.35


Terr.
04-10-1886
I
160.00
2.28
4.63


Terr.
04-10-1886
I
175.30
2.50
7.13


Terr.
04-10-1886
I
820.00
11.71
18.84


659E
05-04-1901
D,I,S
320.00
4.57
23.41


1116E
05-21-1903
I
159.00
2.27
25.68





Irrigators on the Hallie Ditch take advantage of the Double 
Appropriation Doctrine.



Associated Storage Rights:
Irrigators on Hallie Ditch use stored water from Willow and Cloud Peak 
reservoirs.



Irrigation Practices:
See introduction to Rock Creek drainage above



Return Flows:
Estimated percentage of total diversion developing into return flows:









Destination
Wet Yr.
Avg. Yr.
Dry Yr.


Shell Creek
5
2
0







Losses:
25 percent by the end of the ditch



References:
Carmine LoGuidice, water commissioner, State Engineer.s Office, 
interview, 18 Oct. 2000








Irrigated Lands Water Rights Database




PerNo
PerSfx
Facility Name
Priority
Acres
Amount
Unit
SupTyp
Status
Source



Terr
D
Hallie
April 10, 1886
1320.3
18.84
CFS
OS
Adj
Rock Creek


659
E
Enl. Hallie
May 4, 1901
320
4.57
CFS
OS
Adj
Rock Creek


2531
E
Enl. Kempton (Hallie)
Aug. 21, 1911
24
0.34
CFS
OS
Adj
Rock Creek










Name

                                 Source

                                 District

                                 Data		
Hallie Ditch Diversion

					  Rock Creek

					  3

				        Total monthly flow in AF


Water Year
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Total



1970



























1971












0.00
228.69
799.02
562.95
547.54
388.40
2526.60


1972












0.00
261.64
1104.34
642.94
615.55
635.90
3260.37


1973












0.00
258.39
1324.16
421.47
737.04
487.34
3228.40


1974












20.89
924.14
1143.71
611.48
407.03
237.26
3344.51


1975












0.00
0.00
0.00
422.24
436.76
448.54
1307.54


1976



























1977












0.00
604.40
1026.85
532.26
0.00
0.00
2163.51


1978












0.00
0.00
0.00
511.14
498.15
439.62
1448.91


1979



























1980












0.00
193.00
633.00
255.00
552.00
0.00
1633.00


1981












0.00
333.00
720.00
372.00
349.00
232.00
2006.00


1982












0.00
34.40
750.00
810.00
260.00
400.00
2254.40


1983












0.00
0.00
846.00
567.00
507.00
225.00
2145.00


1984












0.00
0.00
400.00
846.00
248.00
401.00
1895.00


1985












0.00
287.00
821.00
345.00
404.00
351.00
2208.00


1986












122.00
689.00
803.00
800.00
246.00
414.00
3074.00


1987












0.00
541.47
611.48
473.86
473.00
542.00
2641.81


1988












0.00
0.00
541.50
240.60
159.60
114.70
1056.40


1989












0.00
683.10
612.40
492.90
528.80
238.20
2555.40


1990












0.00
32.91
951.25
531.74
335.03
253.83
2104.76


1991












0.00
55.70
605.70
563.90
355.70
192.50
1773.50


1992












0.00
597.80
787.90
467.90
422.00
266.50
2542.10


1993












0.00
0.00
246.90
289.00
444.70
455.60
1436.20


1994












3.80
365.40
538.90
378.50
320.70
163.40
1770.70


1995












48.20
86.30
433.00
436.30
299.40
311.60
1614.80


1996












0.00
312.80
926.90
475.10
287.30
418.00
2420.10


1997












0.00
464.90
422.80
130.00
77.70
49.30
1144.70


1998












0.00
437.30
959.90
712.50
739.00
390.90
3239.60


1999












0.00
34.10
268.10
398.90
466.70
372.20
1540.00


Mean












7.22
275.02
676.96
492.25
396.95
312.18
2160.57


Max












122.00
924.14
1324.16
846.00
739.00
635.90
3344.51


Min












0.00
0.00
0.00
130.00
0.00
0.00
1056.40



Notes:

1. Monthly data is from Hydrographers' Annual 
Reports for years 1980 and later, and from WRDS for years prior to 1980

2. Zero flow is assumed prior to the first and after the last measurement

3. Monthly data for May-July 1987 is derived from spot measurements in the 
Hydrographers' Annual Reports.

4. June & July 1974 data includes interpolated data using WRDS records.


			       





Name

                                 Source

                                 District

                                 Data		
Hallie Ditch Diversion

					  Rock Creek

					  3

				        First & Last Dates, Max. Days


Water Year
First Date of Measurement
Last Date of Measurement
Maximum Days Missing



1970







1971
24-May
30-Sep
0


1972
10-May
30-Sep
0


1973
22-May
30-Sep
0


1974
28-Apr
30-Sep
0


1975
07-Jul
30-Sep
0


1976







1977
17-May
31-Jul
27


1978
11-Jul
30-Sep
0


1979







1980
11-May
29-Aug
0


1981
01-May
30-Sep
0


1982
24-May
30-Sep
0


1983
01-Jun
30-Sep
0


1984
11-Jun
30-Sep
0


1985
23-May
30-Sep
0


1986
09-Apr
25-Sep
0


1987
14-May
30-Sep
44


1988
06-Jun
30-Sep
0


1989
10-May
30-Sep
0


1990
31-May
30-Sep
0


1991
29-May
30-Sep
0


1992
05-May
30-Sep
0


1993
14-Jun
30-Sep
0


1994
30-Apr
30-Sep
0


1995
19-Apr
30-Sep
0


1996
01-May
30-Sep
0


1997
16-May
30-Sep
0


1998
05-May
30-Sep
0


1999
26-May
30-Sep
0


Avg.
19-May
26-Sep
3


Earliest
09-Apr
31-Jul
0


Latest
11-Jul
30-Sep
44




Notes:
1. Data is from Hydrographers' Annual Reports for years 1980 and later,
and from WRDS for years prior to 1980.










KEY DIVERSIONS





Diversion:
LAKE DESMET (M&M) DITCH DIVERSION


Lake DeSmet Ditch headgate



Date
18 Oct. 2000



Diversion Description:
Headgate consists of two, 5.5 x 4.5-foot steel gates in steel slides 
operated with Waterman-type screws, mounted in a concrete headwall. 
The structure adjoins a rock dam. The diversion is in excellent condition.



Diversion Location:	
The Lake DeSmet Ditch diversion is located on the main stem of Rock 
Creek, between the confluence of the South and North forks and the 
confluence of Rock and Sayles creeks. 


Lake DeSmet Ditch flume










Headgate:


Lat.
Long.


N 44° 26' 6.8''
W 106° 48' 55.2''





Flume:


Lat.
Long.


N 44° 26' 5.3''
W 106° 48' 49.2''







Conveyance Description:
Open channel canal, approximately 9.2 mi. long, with approximately 400 
feet in a siphon.



Direct Flow Water Rights:
The summary for direct flow rights follows:









Permit
Priority Date
Permitted Use
Acres
Flow (cfs)
Cumulative (cfs)



Terr.
10-31-1884
I
25.00
0.36
0.36


Terr.
10-31-1884
I
70.00
1.00
1.36


Terr.
10-31-1884
I
100.00
1.43
2.79


Terr.
10-31-1884
I
300.00
4.28
7.07


Terr.
10-31-1884
I
520.00
7.43
14.50


Terr.
10-31-1884
I
523.00
7.47
21.97


Terr.
10-31-1884
I
3500.70
50.01
71.98


658E
04-22-1901
I
373.00
5.32
77.30


Terr.
04-19-1902
I
359.00
5.12
82.42


6800E
12-20-1979
Fish
0.00
10.00
92.42





Much of the water carried by this ditch is actually from South Piney Creek.


The maximum appropriation carried by the Lake DeSmet Ditch is approximately 
58 percent (54 cfs). The condition of the ditch precludes larger flows.



Associated Storage Rights:
Irrigators on Lake DeSmet Ditch use stored water from Willow and 
Cloud Peak reservoirs.



Irrigation Practices:
See introduction to Rock Creek drainage above



Return Flows:
Estimated percentage of total diversion developing into return flows:









Destination
Wet Yr.
Avg. Yr.
Dry Yr.


Rock Creek
5
2
0







Losses:
Approximately 5 percent by the end of the ditch



References:
Carmine LoGuidice, water commissioner, State Engineer.s Office, 
interview, 18 Oct. 2000









Irrigated Lands Water Rights Database




PerNo
PerSfx
Facility Name
Priority
Acres
Amount
Unit
SupTyp
Status
Source



Terr
D
Lake DeSmet
Oct. 31, 1884
5038.7
71.98
CFS
OS
Adj
Rock Creek


815
E
Enl. Lake DeSmet
April 19, 1902
359
5.12
CFS
OS
Adj
Rock Creek









Name

                                 Source

                                 District

                                 Data		
Lake DeSmet (M&M) Ditch Diversion

					  Rock Creek

					  3

				        Total monthly flow in AF


Water Year
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Total



1970



























1971












475.40
2287.73
2162.78
1372.36
1423.34
841.31
8562.92


1972












113.36
1385.51
2269.09
1630.61
1426.91
286.04
7111.52


1973












418.67
1583.48
2742.94
1591.73
1186.31
676.94
8200.07


1974












117.46
1975.81
2162.78
1619.70
1414.21
571.04
7861.00


1975












0.00
0.00
0.00
2280.73
1878.74
0.00
4159.47


1976



























1977












0.00
1496.03
1556.43
1357.43
957.04
180.04
5546.97


1978












238.31
661.65
1123.04
1257.62
1640.27
568.66
5489.55


1979



























1980












266.00
1680.00
1665.00
1230.00
1051.00
366.00
6258.00


1981












116.00
984.00
1662.00
1413.00
1032.00
505.00
5712.00


1982












190.00
700.00
1880.00
1510.00
1120.00
670.00
6070.00


1983












433.00
701.00
1760.00
1120.00
990.00
940.00
5944.00


1984












0.00
725.00
969.00
1033.00
1570.00
764.00
5061.00


1985












0.00
0.00
1451.00
1073.00
1308.00
348.00
4180.00


1986












0.00
1877.00
2001.00
1160.00
1078.00
1365.00
7481.00


1987












277.00
1992.00
1430.00
973.00
901.00
964.00
6537.00


1988












287.40
1353.70
1942.60
1401.30
633.50
120.00
5738.50


1989












160.60
424.40
1709.90
1398.10
691.90
397.30
4782.20


1990












286.60
1505.44
1692.62
1276.36
1313.49
530.39
6604.90


1991












237.90
965.70
1577.50
1020.90
954.80
406.60
5163.40


1992












210.60
1317.60
1001.40
744.00
620.30
746.70
4640.60


1993












53.50
1405.10
1209.40
526.80
601.40
393.20
4189.40


1994












80.10
1034.40
1368.30
819.40
432.80
27.70
3762.70


1995












0.00
102.70
1138.80
562.00
676.30
366.90
2846.70


1996












0.00
1188.90
1935.90
666.40
488.10
380.10
4659.40


1997












0.00
792.10
957.20
507.70
375.20
435.20
3067.40


1998












0.00
1225.60
2186.90
823.80
929.30
305.20
5470.80


1999












0.00
317.80
1333.00
614.70
982.20
466.00
3713.70


Mean












146.74
1099.36
1588.47
1147.54
1025.04
504.49
5511.64


Max












475.40
2287.73
2742.94
2280.73
1878.74
1365.00
8562.92


Min












0.00
0.00
0.00
507.70
375.20
0.00
2846.70



Notes:

1. Monthly data is from Hydrographers' Annual 
Reports for years 1980 and later, and from WRDS for years prior to 1980

2. Zero flow is assumed prior to the first and after the last measurement







Name

                                 Source

                                 District

                                 Data		
Lake DeSmet (M&M) Ditch Diversion

					  Rock Creek

					  3

				        First & Last Dates, Max. Days


Water Year
First Date of Measurement
Last Date of Measurement
Maximum Days Missing



1970







1971
04-Apr
30-Sep
0


1972
19-Apr
16-Sep
0


1973
10-Apr
30-Sep
0


1974
27-Apr
30-Sep
0


1975
01-Jul
31-Aug
0


1976







1977
01-May
30-Sep
0


1978
18-Apr
30-Sep
0


1979







1980
01-Apr
30-Sep
0


1981
01-Apr
30-Sep
0


1982
14-Apr
30-Sep
0


1983
01-Apr
30-Sep
0


1984
18-May
30-Sep
0


1985
06-Jun
30-Sep
0


1986
01-May
30-Sep
0


1987
10-Apr
30-Sep
44


1988
12-Apr
30-Sep
0


1989
11-Apr
30-Sep
0


1990
05-Apr
30-Sep
0


1991
02-Apr
30-Sep
0


1992
01-Apr
30-Sep
0


1993
16-Apr
30-Sep
0


1994
20-Apr
15-Sep
0


1995
19-May
30-Sep
0


1996
14-May
30-Sep
0


1997
13-May
30-Sep
0


1998
06-May
24-Sep
0


1999
07-May
30-Sep
0


Avg.
24-Apr
27-Sep
0


Earliest
01-Apr
31-Aug
0


Latest
01-Jul
30-Sep
0




Notes:
1. Data is from Hydrographers' Annual Reports for years 1980 and later,
and from WRDS for years prior to 1980.












KEY DIVERSIONS





Diversion:
MOWRY BASIN DITCH DIVERSION


Mowry Basin headgate



Date
18 Oct. 2000



Diversion Description:
Headgate consists of a single, 3.5 x 1.2-foot steel gate in steel slides 
operated with a Waterman-type screw, mounted in a concrete headwall. 



Diversion Location:	
	The Mowry Basin Ditch diversion is located on the South Fork of Rock 
Creek. 










Headgate:


Lat.
Long.


N 44° 26' 46.4''
W 106° 54' 30.7''





Flume:


Lat.
Long.


N 44° 26' 43.8''
W 106° 54' 20.0''






Mowry Basin flume




Conveyance Description:
Canal, approximately 2.4 mi. long, with approximately 450 ft. of length 
in pipe.



Direct Flow Water Rights:
The summary for direct flow rights follows:









Permit
Priority Date
Permitted Use
Acres
Flow (cfs)
Cumulative (cfs)



Terr.
10-20-1884
I
10.00
0.14
0.14


Terr.
10-20-1884
I
70.00
1.00
1.14


Terr.
-1887
I
177.00
2.53
3.67


Terr.
-1887
I
60.00
0.86
4.53


Terr.
-1887
I
40.00
0.57
5.10


Terr.
-1887
I
35.00
0.50
5.60


2390E
07-25-1910
I
382.70
5.46
11.06


2460E
04-20-1911
I
111.60
1.59
12.65





Associated Storage Rights:
Irrigators on Mowry Basin Ditch have arranged an exchange for water 
stored in Cloud Peak Reservoir.



Irrigation Practices:
See Rock Creek summary above










Destination
Wet Yr.
Avg. Yr.
Dry Yr.


Rock Creek
10
5
2







Losses:
Approximately 5 percent by the end of the ditch



References:
Carmine LoGuidice, water commissioner, State Engineer.s Office, 
interview, 18 Oct. 2000








Irrigated Lands Water Rights Database




PerNo
PerSfx
Facility Name
Priority
Acres
Amount
Unit
SupTyp
Status
Source



Terr
D
Mowry Basin (Fenton)
Oct. 20, 1884
80
1.14
CFS
OS
Adj
South Fork Rock Creek


Terr
D
Mowry Basin, 2nd App.
Dec. 31, 1887
312
4.46
CFS
OS
Adj
South Fork Rock Creek


Terr
D
Mowry Basin
Dec. 31, 1887
40
0.57
CFS
OS
Adj
South Fork Rock Creek


1900
E
Enl. Fenton (Mowry Basin)
June 1, 1908
120
1.71
CFS
OS
Adj
Rock Creek


2390
E
Enl. Mowry Basin
July 25, 1910
382.7
5.46
CFS
OS
Adj
South Fork Rock Creek


2460
E
Enl. Mowry Basin
April 20, 1911
111.6
1.59
CFS
OS
Adj
South Fork Rock Creek


4015
E
Enl. Mowry Basin
June 30, 1919
456
0


Sec
Adj
Mowry Basin (1355R)


303201
D
Love Enl. Mowry Basin
Nov. 9, 2000
0
0


OS
Una
South Fork Rock Creek











Name

                                 Source

                                 District

                                 Data		
Mowry Basin Ditch Diversion

					  Rock Creek

					  3

				        Total monthly flow in AF


Water Year
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Total



1970



























1971



























1972



























1973



























1974



























1975



























1976



























1977



























1978



























1979



























1980



























1981














521.86
406.12
293.08
292.67
82.57
1596.30


1982














50.34
503.40
432.71
249.02
88.36
1323.83


1983














117.46
503.40
450.97
289.61
149.56
1511.00


1984














0.00
238.02
678.51
339.94
80.33
1336.80


1985



























1986














0.00
733.96
482.17
265.01
128.23
1609.37


1987














0.00
344.07
244.40
0.00
0.00
588.47


1988














0.00
48.10
221.53
175.85
73.75
519.23


1989



























1990














280.88
434.55
527.44
441.78
11.66
1696.31


1991














79.46
301.01
354.53
374.01
15.53
1124.54


1992














0.00
0.00
33.02
368.40
82.36
483.78


1993














317.42
85.51
198.81
354.18
33.80
989.72


1994














237.38
327.30
247.52
196.06
0.00
1008.26


1995














155.34
361.68
139.60
285.53
92.81
1034.96


1996














20.45
230.91
251.44
245.95
82.81
831.56


1997














128.08
214.91
149.95
155.29
0.00
648.23


1998














570.85
621.95
230.62
152.85
224.68
1800.95


1999














0.00
198.33
444.40
240.91
10.71
894.35


Mean














145.85
326.66
316.51
260.42
68.07
1117.51


Max














570.85
733.96
678.51
441.78
224.68
1800.95


Min














0.00
0.00
33.02
0.00
0.00
438.78



Notes:

1. Monthly data is from Hydrographers' Annual 
Reports for years 1980 and later, and from WRDS for years prior to 1980

2. Zero flow is assumed prior to the first and after the last measurement








Name

                                 Source

                                 District

                                 Data		
Mowry Basin Ditch Diversion

					  Rock Creek

					  3

				        First & Last Dates, Max. Days


Water Year
First Date of Measurement
Last Date of Measurement
Maximum Days Missing



1970







1971







1972







1973







1974







1975







1976







1977







1978







1979







1980







1981
01-May
11-Sep
26


1982
29-May
11-Sep
6


1983
25-May
22-Sep
10


1984
21-Jun
12-Sep
8


1985







1986
02-Jun
15-Sep
10


1987
12-Jun
16-Jul
4


1988
24-Jun
13-Sep
5


1989







1990
15-May
04-Sep
16


1991
27-May
06-Sep
25


1992
27-Jul
09-Sep
7


1993
04-May
07-Sep
45


1994
16-May
30-Aug
40


1995
10-May
19-Sep
28


1996
20-May
17-Sep
32


1997
21-May
15-Aug
21


1998
17-May
22-Sep
36


1999
10-Jun
01-Sep
20


Avg
29-May
06-Sep
20


Earliest
01-May
16-Jul
4


Latest
27-Jul
22-Sep
45




Notes:
1. Data is from Hydrographers' Annual Reports for years 1980 and later,
and from WRDS for years prior to 1980.











KEY DIVERSIONS





Diversion:
PRINCE ALBERT DITCH DIVERSION


Prince Albert Ditch headgate



Date
18 Oct. 2000



Diversion Description:
Headgate consistsof a single 4 x 3.5-foot steel gate in steel slides 
operated with Waterman-type screws, mounted in a concrete headwall 
penetrated by 18 ft of three-foot-diameter corrugated metal pipe. 



Diversion Location:	
The Prince Albert Ditch diversion is located on the main stem of Rock 
Creek, just upstream of the confluence Rock and Clear creeks. 










Headgate:


Lat.
Long.


N 44° 22' 16''
W 106° 40' 25''





Flume:


Lat.
Long.


N 44° 22' 13''
W 106° 40' 20''






Prince Albert Ditch flume




Conveyance Description:
Open channel canal, approximately 2.5 mi. long.



Direct Flow Water Rights:
The summary for direct flow rights follows:









Permit
Priority Date
Permitted Use
Acres
Flow (cfs)
Cumulative (cfs)



Terr.
06-10-1883
I
8.00
0.11
0.11


Terr.
06-10-1883
I
520.00
7.43
7.54


Terr.
06-00-1885
I
180.00
2.57
10.11



The Prince Albert Ditch typically carries 200 percent of its allocation 
during the early season as per the Wyoming Double Appropriation 
Doctrine.




Associated Storage Rights:
None



Irrigation Practices:
See introduction to Rock Creek drainage above



Return Flows:
Estimated percentage of total diversion developing into return flows:









Destination
Wet Yr.
Avg. Yr.
Dry Yr.


Clear Creek
10
5
2







Losses:
Approximately 15 percent by the end of the ditch



References:
Carmine LoGuidice, water commissioner, State Engineer.s Office, 
interview, 18 Oct. 2000








Irrigated Lands Water Rights Database




PerNo
PerSfx
Facility Name
Priority
Acres
Amount
Unit
SupTyp
Status
Source



Terr
D
Prince Albert
June 10, 1883
528
7.54
CFS
OS
Adj
Rock Creek









Name

                                 Source

                                 District

                                 Data		
Princ Albert Ditch Diversion

					  Rock Creek

					  3

				        Total monthly flow in AF


Water Year
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Total



1970



























1971



























1972



























1973



























1974














232.76
240.87
200.65
98.24
0.00
772.52


1975



























1976



























1977



























1978



























1979



























1980



























1981














523.05
338.85
330.58
11.23
0.00
1203.71


1982














202.25
417.33
375.94
462.94
115.36
1573.82


1983














94.61
567.67
468.43
307.27
0.00
1437.98


1984














0.00
0.00
480.29
333.89
0.00
814.18


1985



























1986














300.50
465.72
238.79
400.68
139.37
1545.06


1987














335.36
446.46
147.97
0.00
0.00
929.79


1988














0.00
88.99
248.50
0.00
0.00
337.49


1989



























1990














0.00
13.39
48.20
12.10
0.00
73.69


1991














0.00
14.99
308.07
284.27
107.52
714.85


1992














0.00
0.00
26.83
249.55
180.91
457.29


1993














220.09
185.66
169.40
190.80
121.37
887.32


1994














90.86
394.60
277.71
59.31
0.00
822.48


1995














79.23
191.32
430.23
190.08
94.81
985.67


1996














23.60
262.06
299.78
280.76
158.17
1024.37


1997














107.61
110.70
367.85
4.72
0.00
590.88


1998














97.75
49.87
364.40
252.29
127.57
891.88


1999














0.00
10.06
350.34
349.88
0.00
710.28


Mean














128.20
211.03
285.22
193.78
58.06
876.29


Max














523.05
567.67
480.29
462.94
180.91
1573.82


Min














0.00
0.00
26.83
0.00
0.00
73.69



Notes:

1. Monthly data is derived from spot measurements in the Hydrographers' Annual 
Reports for years 1980 and later, and from WRDS for years prior to 1980

2. Zero flow is assumed prior to the first and after the last measurement









Name

                                 Source

                                 District

                                 Data		
Prince Albert Ditch Diversion

					  Rock Creek

					  3

				        First & Last Dates, Max. Days


Water Year
First Date of Measurement
Last Date of Measurement
Maximum Days Missing



1970







1971







1972







1973







1974
17-May
13-Aug
0


1975







1976







1977







1978







1979







1980







1981
01-May
01-Aug
16


1982
21-May
08-Sep
26


1983
27-May
24-Aug
10


1984
07-Jul
30-Aug
8


1985







1986
16-May
13-Sep
10


1987
14-May
16-Jul
24


1988
24-Jun
24-Jul
4


1989







1990
26-Jun
07-Aug
15


1991
21-Jun
13-Sep
13


1992
27-Jul
25-Sep
9


1993
18-May
28-Sep
14


1994
23-May
30-Aug
40


1995
10-May
19-Sep
15


1996
20-May
17-Sep
32


1997
21-May
14-Aug
23


1998
21-May
16-Sep
31


1999
03-Jun
31-Aug
26


Avg
31-May
28-Aug
18


Earliest
01-May
16-Jul
0


Latest
27-Jul
28-Sep
40




Notes:
1. Data is from Hydrographers' Annual Reports for years 1980 and later,
and from WRDS for years prior to 1980.