WSP01580

• File Number: 8143.800
• Description: John Martin Reservoir - Water and Contracts
• State: CO
• Basin: Arkansas
• Water Division: 2
• Date: 12/1/2000
• Title: Report of the Colorado State Engineer - Concerning Accounting of the Operations of an Offset Account in John Martin Reservoir for Colorado Pumping - 1998 -- Part 2 of 2
• Water Supply Pro - Doc Type: Report/Study

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WATER DIVISION 2
OFFICE OF THE STATE ENGINEER

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STATE OF COLORADO
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"18769

310 East Abriendo, Suite B
Pueblo, Colorado 81004
Phone: [phone]
FAX: [phone]

February 21, 2000

hup://water .state.co.us/default.htm
David L. Pope
Kansas Chief Engineer
o
o Kansas Board of Agriculture
W 901 S, Kansas Avenue, 2nd Floor
o
", Topeka, KS 66612-1283
00
Ms. Mary Louise Clay
Recording Secretary
Arkansas River Compact Administration
307 South Fifth Street
Lamar, CO 81052

BiflOwens
Governor

Greg E. Walcher
Executive Director

HalO. Simpson, P.E.
State Engineer
Steven J. Witte, P.E.
Division Engineer

RE: Monthly Report of Colorado Pumping and Offset Account Operations for December, 1999

Dear Mr. Pope and Ms. Clay:

The purpose of this letter is to provide the monthly report required by paragraph 12 of the
Resolution Concerning an Offset Account in John Martin Reservoir for Colorado Pumping
As Amended March 30, 1998 ("Resolution"). This letter reports the monthly pumping in excess
of Colorado's pre-Compact entitlement, Colorado's monthly accounting of Compact compliance,
and the status of water delivered to the Offset Account, all during the month of December, 1999.

Table I shows the amount of pumping during the month of December, 1999 by irrigation wells
pumping from the Valley Fill Aquifer and surficial aquifers along the Arkansas River between
Pueblo and the Stateline, as well as the corresponding wellhead depletions, by user group, The
wellhead depletions were computed using the presumptive stream depletions in Rule 4.2 of the
AMENDED RULES AND REGULATIONS GOVERNING THE DIVERSION AND USE
OF TRIBUTARY GROUND WATER IN THE ARKANSAS RIVER BASIN,
COLORADO ("Rules") approved in Case No. 95CW211.

Table 2 shows the wellhead depletions due to pumping by irrigation wells in the user groups
below John Martin Reservoir that are in excess of the pre-Compact entitlements.

Since the depletions caused by pumping above John Martin Reservoir were fully replaced, and
that accounting has been provided to Kansas, and the depletions caused by pwnping below John
Martin Reservoir which affect senior surface water rights in Colorado were fully replaced, and
that accounting has been provided to Kansas, the accounting in this report shows only remaining
depletions caused by irrigation pumping in excess of the pre-Compact entitlements for those