Availability of project water

7195423203

PUEBLO FIELD DIV. BOR ID:7195423203 JAN 31'96 14:40 No.005 P.01

United States Department of

the Interior

IN REPLY REFER TO:

EC-1200

Mr. Steve Arveschoug

Southeastern Colorado Water Conservancy District P.O. Box 440

Pueblo CO 81002-00440

BUREAU OF RECLAMATION Eastern Colorado Area Office

11056 West County RD 1RE Loveland, Colorado 80537-9711

(11; LI J.

Subject: Availability of Project Water - Fryingpan-Arkansas Project - Eastern Colorado Area Office

Dear Mr. Arveschoug:

Based on January 31. 1996. estimates. we foresee approximately

175,000 acre-feet of project water that could be made available to the district.

If you have any questions or need additional information please contact Ms. Linda Hopkins at 544-817]. Sincerely. CI C...., Linda Hopkins Hydrologic Technician ...;,..t...1...74. I w; ;,;;,„, • 74 p "'4, • tA,,,..4.. 4, I ...."•!'::".''.. or ".•.`"‘‘.".

IN REPLY REFER TO:

EC-1200

United States Department of

the Interior

Eastern Colorado Area Office 11056 West County RD 18E Loveland, Colorado 80537-9711

Mr. Steve Arveschoug

General Manager

Southeastern Colorado

Water Conservancy District

P.O. Box 440

Pueblo CO 81002

su

1997

I

I

7

Subject:

Availability of Arkansas Project Water -

Fryingpan-Arkansas Project - Eastern Colorado Area Office

Dear Mr. Arveschoug:

„,..,,A,NT 0,

Pursuant to Article 6(a) of Amendment No. 4 to Contract No. 50-07-70-W0086, we

have estimated a total of 206,258 acre-feet of Fryingpan-Arkansas Project

water.to be available for the Southeastern Colorado Water Conservancy District

during the period May 1,.1997 through April 30: 1998. Of the 206,258

acre-feet of water, 116,000 acre-acre-feet are available for allocation this year.

The 206,258 acre-feet of Project water, as of May 1, 1997, have been

identified as follows:

Estimated Net

Estimated

Water Available

Eva oration

At Pueblo

District Purchased Water

95,532

5,367

90,165

Unallocated Project Water

56,134

3,154 .- 52,980

1997 New Water

66,870 3.757 63.113

218,536

12,278

206,258

The above Project water availability is our best estimate at this time, based

on current' most probable water supply projections and estimated evaporation

rates. The forecast assumes normal precipitation will occur in. May, June, .

2

and July. As the season progresses, we will monitor actual quantities and

provide you with a revised estimate if conditions warrant.

Sincerely,

A. Jack Garner

Area Manager

i ., , IN REPLY REFER TO: E-1400

United States Department of the Interior

BUREAU OF RECLAMATION Great Plains Region

ZASTERN COLORADO PROJZCT8 OFTICZ P.O. Box 449

Lovaland, Colorado 80539..0449

Mr. Charles L. Thomson

General Manager, Southeastern

Colorado Water Conservancy District P.O. Box 440

Pueblo CO 81002

Subject: Availability of Fryingpan-Arkansas Project Water (Water Allocation) Dear Mr. Thomson:

Pursuant to Article 6(a) of Amendment No. 4 to Contract No. 50-074040086, we have estimated a total of 134,420 acre-feet of Fryingpan-Arkansas Project water to be available for the Southeastern Colorado Water Conservancy District durIng the period May 1, 1990 through April 30, 1991.

The 134,420 acre-feet of Project water, as of May 1, 1990, has been identified as follows:

Estimated Net Estimated Water Available Emoration t Pueblo District Purchased Water 94,970 5,330 89,640 Project water 16,850 950 15,900 1990 New Water 30,600 1,720 29,880 The above Project water availability is our best esticate at this time, based on current water supply projections and estimated evaporation rates. As the season progresses, we will monitor actual quantities and provide you with a revised estimate if conditions warrant.

Sincerely, Steven R. Clark Project Manager .':c: E-140/Killgcre E-1200 ,

• • _v

as V

DETERMINATION OF FRYINGPAN-ARKANSAS PROJECT AVAILABLE TO THE SECWCD

I. Obtain midnight April 30 Fry-Ark Project water in storage in Turquoise Lake.

2. Reduce the Project water by the minimum pool of 8,920 acre-feet.

3. Reduce the amount determined in No. 2 above by any Fry-Ark Project imports prior to midnight April 30.

4. Reduce this amount by the transit loss from Twin Lakes to Pueblo Reservoir (10% loss).

Example: April 30, 1990 Turquoise Fry-Ark water

Minimum pool Transit loss 33,251 AF .10A20 AF 24,331 AF -2,431 AF 21,898 AF

5. Obtain midnight April 30 Fry-Ark Project water in storage in Twin Lakes/Mt. Elbert forebay.

6. Reduce the Project water by the minimum pool of 20,757 acre-feet. 7. Reduce this amount by the transit loss to Pueblo Reservoir (10% loss).

Example: April 30, 1990 Twin Lakes/Mt. Elbert

Fry-Ark water Minimum pool Transit loss 38,187 AF -20t757 AF 17,430 AF :14743 AF 15,587 AF

8. Obtain midnight April 30 Fry-Ark Project water in storage in Pueblo Reservoir.

9. Reduce the Project water by the minimum pool of 30,355 acre-feet. Example: April 30, 1990

Pueblo Reservoir Fry-Ark water Minimum pool

104,590 AF 230t35i AF 74,235 AF

10. Determine the estimated Fryingpan-Arkansas Project imports through Boustead Tunnel from the forecast routine.

11. Reduce the estimated Project imports by the 3,000 acre-feet expected to be used by the Twin Lakes Canal Co./Roaring Fork exchange.

12. Reduce this amount by the transit loss from Twin Lakes to Pueblo Reservoir (10% loss).

Example: April 30, 1990 Forecast Fry-Ark Project imports

Twin Lakes exchange Transit loss 37,000 AF AF 34,000 AF

JAIN

13. Summarize the four water supplies into a gross quantity of water available to the SECWCD at Pueblo Reservoir.

Example: April 30, 1990 Turquoise Lake

Twin Lakes/Mt. Elbert Pueblo Reservoir Project imports 21,898 AF 15,687 AF 74,235 AF 30600 AF 142,420 AF

14. Obtain from water accounting sheets midnight April 30 SECWCD water in storage.

15. Reduce the gross water available to the SECWCD by computed new project Imports and the SECWCD water in storage. This will result in the amount of gross Fry-Ark Project water.

Example; April 30, 1990

Gross quantity available to SECWCD 145,120 AF New Project imports -33,300 AF SECWCD water in storage 221.971 AF Gross Fry-Ark Project water 18,850 AF

16. Reduce each water supply by the expected evaporation that will occur during the period May 1 through April 30 of the following year.

Example: April 30, 1990

Net Water Storage on Evaporation Available . Aor 30 MO

1Aat_51

SECWCD water 94,970 5,330 89,640 Fry-Ark Proi water 16,850 950 15,900 Present WY imports

12,50,

LIZ