ARCA
ARCA – 1980 Operating Plan
Resolution concerning an operating plan for John Martin Reservoir
ARCA Annual Reports
Annual Reports by the Administration to the governors of the states of Colorado and Kansas and to the President of the United States covering the Compact year (November 1 – October 31).
ARCA Budget Documents
These documents include the current budget, proposed budget, budget and assessments summary, and audit report.
ARCA By-Laws
By-Laws of the Arkansas River Compact Administration
ARCA Meeting Minutes
Minutes of the Administration’s meetings from 1949 to present.
ARCA Resolutions
Resolutions adopted by the Administration.
Arkansas River Compact
Agreement between the States of Colorado and Kansas on the waters of the Arkansas River Basin.
Assistant Operations Secretary (AOS) Reports
Submitted to the Operations Committee and to ARCA.
Offset Account Crediting Agreement
Agreement concerning the Offset Account in John Martin Reservoir for Colorado pumping, determination of credits for delivery of water released for Colorado pumping, and related matters.
Offset Account Joint Reports
Joint report of the States that provides ARCA with their review of the Offset Account Operations.
Offset Account Reports
Submitted to the Operations Committee and to ARCA.
Offset Account Resolution
Resolution concerning an Offset Account in John Martin Reservoir
Offset Account Stipulation
Stipulation regarding an Offset Account in John Martin Reservoir
Operations Secretary (OS) Reports
Submitted to the Operations Committee and to ARCA.
Section II Agreement
Agreement on determination of transit loss under the provision of Section II E (4) of the 1980 Operating Plan
Ten-Year Compact Compliance Accounting Tables
Moving ten-year period of Compact compliance accounting. In the moving ten-year period the first year in that period will drop off and the most recent completed H-I Model year will be added on.
Trinidad Operating Principles
Operating Principles for the Trinidad Dam and Reservoir Project.
Colorado Rules and Regulations
Colorado Measurement Rules
Rules governing the measurement of tributary groundwater diversions located in the Arkansas River Basin in Colorado.
Colorado Use Rules
Rules and regulations governing the diversion and use of tributary ground water in the Arkansas River Basin in Colorado.
Irrigation Improvement Rules
Compact rules governing improvements to surface water irrigation systems in the Arkansas River Basin in Colorado.
U.S. Supreme Court
2011 Agreement as Amended 2015
Agreement on H-I Model changes to address increases in irrigation efficiency for pumped groundwater.
2015 Agreement as Amended 2024
Agreement on Implementation of John Martin Reservoir Revised Elevation-Area-Capacity Tables in the H-I Model.
2023 Agreement
Agreement Concerning Modifications to Appendix A.1.
2024 Agreement
Agreement on H-I Model Changes to Address LAWMA’s Section II Accounts, X-Y Water Right, and Spill Factors.
Amended Appendix A.1 (12/2023)
Compact Compliance and Repayment Accounting Procedures.
Amended Appendix A.4 (6/26/2009)
Agreement regarding the Colorado Use Rules, PDF evaluation, implementation processes, and related matters, and not to terminate the Offset Account Resolution.
Amended Appendix B.1 (8/2015)
Appendix B.1 includes procedures for annual updates, calculation of depletions and accretions, changes to the H-I Model, reporting, inspection, and evaluation of the Colorado Use Rules. This appendix was amended in 2015 to incorporate the H-I Model changes laid out in the 2011 Agreement as Amended 2015.
Amended Appendix C.1 (1/2024)
Appendix C.1 includes H-I Model documentation. This appendix was amended in 2015 and again in 2024 to incorporate the H-I Model changes laid out in the 2011 Agreement as Amended 2015, the Agreement on Implementation of John Martin Reservoir Revised Elevation-Area-Capacity Tables in the H-1 Model (2015 Agreement as Amended 2024), and the Agreement on H-I Model Changes to Address LAWMA’s Section II Accounts, X-Y Water Right, and Spill Factors (2024 Agreement).
Decree-Volume 1 (2/4/2008)
Fifth and Final Report of Special Master, Arthur L. Littleworth
Decree-Volume 2 (2/4/2008)
Fifth and Final Report of Special Master, Arthur L. Littleworth – Proposed Judgment and Decree
Decree-Volume 3 (2/4/2008)
Fifth and Final Report of Special Master, Arthur L. Littleworth – H-I Model documentation and usable flow methodology
Special Masters Reports
Includes above documents and additional Special Master Reports. Click the link, then scroll to the bottom of the page.