LPPD000265

• Contract/PO #: C153756
• Contractor Name: Lower Arkansas Water Management Association
• Contract Type: Loan
• Water District: 67
• County: Prowers
• Bill Number: SB 96-124
• Loan Projects - Doc Type: Feasibility Study

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TABLE OF CONTENTS

Executive Summary..,....................................,............".......,.,......",.....,............................,..... 4

Glossary of Terms,........................................................... ...................................................... 10

Overview............................................................................ .................................................... 12

History of Colorado Conjlll1ctive Use................................,.......,..................................... 12
Purpose and Operation of LA WMA ..........,..................................................................... 13
Pumping vs. Depletion vs. Replacement.... ......................... .................... ......................... 14
Replacement Water PooL.................................................................................................. 15

The Dry Year ..................................................................................................................... 16

Characteristics of User Groups............................................................................................. 16
Supplemental Users. ......... ............................ ..... ............. ................. ........... ....................... 17

Sole-Source Users.... ............ ...... ....................... ..... .................... ....... ................................. 17

Tributary Users.................................................................................................................. 17

Other Users......................................................................................................................... 17

Range of Organizations......................................................................................................... 18

Criteria for Evaluating the Organizations: Different Impact Measures ......................... 18

Demand Shortfall........................................................................................................... 19

Curtailment.................................................................................................................... 19

Bill Impact..................................................................................................................... 20

LA WMA Revenue Stability ......................................................................................... 20

Current Organization...... ....................... ......................... ...... ................ ................................. 22

Current Organization: Relative (N orm al- Year) Supply Allocation Method (CI)......... 23
Current Organization: Relative (Current- Year) Demand Allocation Method (C2) ...... 26
Surrnnary of Current Organization Allocation Methods................................................. 28

Shares Organization............................................................................................................... 29

Initial Allocation of Shares......................... ...... ................................................................ 30

LAMW A Revenues........................................................................................................... 31

Secondary Market for Shares and Leased Water............................................................. 31
The Shares Organization from the LA WMA Perspective.............................................. 32
Shares Organization: N ormal- Year Allocation Method (S I) ..................................... 32
Shares Organization: Dry-Year Allocation Method (S2) ........................................... 34
Shares Organization: Normal- YearlIl Allocation Method (S3) ................................. 36
General Comparison of Shares vs. Current Organization................................................... 39
Overall Pros and Cons of Shares Organization (Sl, S2 and S3) .................................... 39
Pros and Cons of the Normal Year Allocation Method (Sl)...................................... 39
Pros and Cons of the Dry Year Allocation Method (S2) ............................................ 39
Pros and Cons of the Normal Year/II Allocation Method (S3).................................. 40
Overall Pros and Cons of the Current Organization Methods (CI and C2) .................. 40
Pros and Cons of the Relative Supply Allocation Method (CI) ................................ 40
Pros and Cons of the Relative Demand Allocation Method (C2) ..............................40
Evaluating the Organizations: Supplemental Perspective................................................... 41
Current Organization: Relative (Normal- Year) Supply Allocation Method (CI) .... 41
Current Orgarlization: Relative (Current- Year) Demand Allocation Method (C2) .. 42
Shares Organization: N ormal- Year Allocation Method (S I) ..................................... 43
Shares Orgarlization: Dry-Year Allocation Method (S2) ........................................... 44

EnWater Resource Consultants September 5, 1997 Final Report

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