Powder/Tongue River Basin Water Plan
Technical Memoranda

SUBJECT:	Appendix J Storage Operation and Description DOME LAKE NO. 1
PREPARED BY:	HKM Engineering Inc.
DATE:	March 2002

KEY STORAGE FACILITIES

Reservoir:	DOME LAKE NO. 1 (or ENL OF 688R)
Date:	20 Feb. 2001
Location:	NWSE 2,T53N,R87W
Owner:	DOME LAKE RESERVOIR COMPANY (D. ROBERTS)
Year of Construction:	1907
Enlargement History:	1969, 1979
Total Storage:	2030 acre-feet
Active Storage:	1506 acre-feet
Dead Storage:	Not available
Area/Capacity Data:	(Source: 1992 table on file with State Engineer's Office, Water Div. II)
	Feet Elevation Area Average Acre Volume Released Volume Remaining 0.0 8720 94.00 94.00 0.00 1,506.00 1.0 8719 94.00 94.00 94.00 1,412.00 2.0 8718 91.60 88.35 182.35 1,318.00 3.0 8717 91.60 88.35 270.7 1,229.65 4.0 8716 91.60 88.35 359.05 1,141.30 5.0 8715 85.10 80.75 439.8 1,052.95 6.0 8714 85.10 80.75 520.55 972.20 7.0 8713 85.10 80.75 601.3 891.45 8.0 8712 85.10 80.75 682.05 810.70 9.0 8711 85.10 80.75 762.8 729.95 10.0 8710 76.40 71.15 833.95 649.20 11.0 8709 76.40 71.15 905.1 578.05 12.0 8708 76.40 71.15 976.25 506.90 13.0 8707 76.40 71.15 1,047.4 435.75 14.0 8706 76.40 71.15 1,118.55 364.60 15.0 8705 65.90 53.75 1,172.3 293.45 16.0 8704 65.90 53.75 1,226.05 239.70 17.0 8703 65.90 53.75 1,779.8 185.95 18.0 8702 65.90 53.75 1,333.55 132.70 19.0 8701 65.90 53.75 1,387.3 78.45 20.0 8700 41.60 22.10 1,409.4 24.70 21.0 8699 2.60 2.60 2.60 22.0 8698 1.30 1.30 1.30 23.0 8697 0.00 0.00 0.00
Dam Construction Type:	Earth Fill
Outlet:	Two, three-foot-square concrete Cipolletti weirs (apparently the measuring structures and outlet works)
Spillway:	Single, square 3.5' x 40' channel in concrete on top of dam
End-of-Month Storage Records:	None
Water Rights:	(Source: Tabulation of Adjudicated Surface Water Rights of the State of Wyoming, Water Division Number Two, Oct. 1999.)
	Reservoir Permit Number Permitted Use Priority Date Volume (af) Headgate Location (S-T-R) Dome Lake No. 1 Res 688R D,I,S 06-29-1905 1318 2-53-087 Enl. Dome Lake No. 1. 7024R I,Rec 12-04-1967 188 2-53-087
Designated Use:	Irrigation
Recreational Use:	Fishing and non-motorized boating
Associated Irrigation Diversions:	(Source: Bill Knapp, Div. II water commissioner/hydrographer)
	Diversion Tributary P.K. Ditch Big Goose Alliance Ditch Big Goose
Associated Industrial Diversions:	None
Operational Discussion:	Dome Lake No. 1 Reservoir collects water from the West Fork of Big Goose Creek. Its releases pass through Dome Lake Reservoir and the Weir Pond immediately downstream, and are delivered to users on Big Goose Creek. The operator shuts it down entirely on Oct. 1.
	First release timing, Dome Lake No. 1 Reservoir
	Wet Year Average Year Dry Year 2nd week of July 4th week of June 2nd week of June
	Dome Lake No. 1 has no winter flows.
References:	Bill Knapp, water commissioner, interview, State Engineer's Office, Sheridan, Wyoming, 20 Feb. 2001
	Active Dams, State Engineer's Office Safety of Dams Engineering Div. Database, transmitted by Larry Stockdale, Safety of Dams engineering consultant, 16 Feb. 2001.
	Tabulation of Adjudicated Surface Water Rights of the State of Wyoming, Water Division Number Two, Oct. 1999, database transmitted by Rebecca Mathisen, SEO Technical Services Division administrator, 8 Sept. 2000.

Net Evaporation from Dome Lake Reservoir:

Lewis Annual Evaporation (in.)	46
Total Storage (acre-feet)	2,030

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Average percent of total storage	56.72	57.55	57.87	60.80	71.16	72.71	68.17	64.03	57.62	57.03	58.79	60.84
Generated storage (acre-feet)	1151	1168	1175	1234	1445	1476	1384	1300	1170	1158	1194	1235
Corresponding area (acres)	91.6	91.6	91.6	91.6	94	94	91.6	91.6	91.6	91.6	91.6	91.6
Calculations:
Monthly Lewis Evap. (inches)	1.242	1.15	1.794	3.68	5.29	6.026	7.866	7.176	5.29	3.496	1.794	1.196
Monthly Precipitation (inches)	1.75	1.75	2.25	2.75	3.75	2.75	1.75	1.25	2.25	2.25	1.75	1.75
Net Evaporation (inches)	0	0	0	0.93	1.54	3.276	6.116	5.926	3.04	1.246	0.044	0	TOTAL
Total Net Evaporation (acre-feet)	0	0	0	7	12	26	47	45	23	10	0	0	170