Colo. Rev. Stat. § 37-63-101
The General Assembly hereby approves the compact, designated as the "La Plata River Compact", signed at the City of Santa Fe, State of New Mexico, on the 27th day of November, A. D. 1922, by Delph E. Carpenter as the Commissioner for the State of Colorado, under authority of and in conformity with the provisions of an Act of the General Assembly of the State of Colorado, approved April 2, 1921, entitled "An Act providing for the appointment of a commissioner on behalf of the State of Colorado to negotiate a compact or agreement between the States of Colorado and New Mexico respecting the use and distribution of the waters of the La Plata River and the rights of said States thereto, and making an appropriation therefor.", the same being Chapter 244 of the Session Laws of Colorado, 1921, and signed by Stephen B. Davis, Jr., as the Commissioner for the State of New Mexico, under legislative authority, which said compact is as follows:
La Plata River Compact
The State of Colorado and the State of New Mexico, desiring to provide for the equitable distribution of the waters of the La Plata River and to remove all causes of present and future controversy between them with respect thereto, and being moved by considerations of interstate comity, pursuant to Acts of their respective Legislatures, have resolved to conclude a compact for these purposes and have named as their commissioners:
Delph E. Carpenter, for the State of Colorado; and Stephen B. Davis, Jr., for the State of New Mexico; who have agreed upon the following Articles:
The State of Colorado, at its own expense, shall establish and maintain two permanent stream-gauging stations upon the La Plata River for the purpose of measuring and recording its flow, which shall be known as the Hesperus Station and the Interstate Station, respectively.
The Hesperus Station shall be located at some convenient place near the village of Hesperus, Colorado. Suitable devices for ascertaining and recording the volume of all diversions from the river above Hesperus Station, shall be established and maintained (without expense to the State of New Mexico), and whenever in this compact reference is made to the flow of the river at Hesperus Station, it shall be construed to include the amount of the concurrent diversions above said station.
The Interstate Station shall be located at some convenient place within one mile of, and above or below, the interstate line. Suitable devices for ascertaining and recording the volume of water diverted by the Enterprise and Pioneer Canals, now serving approximately equal areas in both States, shall be established and maintained (without expense to the State of New Mexico), and whenever in this compact reference is made to the flow of the river at the Interstate Station, it shall be construed to include one-half the volume of the concurrent diversions by such canals, and also the volume of any other water which may hereafter be diverted from said river in Colorado for use in New Mexico.
Each of said stations shall be equipped with suitable devices for recording the flow of water in said river at all times between the 15th day of February and the 1st day of December of each year. The State Engineers of the signatory States shall make provision for co-operating gauging at the two stations, for the details of the operation, exchange of records and data, and publication of the facts.
The waters of the La Plata River are hereby equitably apportioned between the signatory States, including the citizens thereof, as follows:
The State Engineers of the States by agreement, from time to time, may formulate rules and regulations for carrying out the provisions of this compact, which, when signed and promulgated by them, shall be binding until amended by agreement between them or until terminated by written notice from one to the other.
Whenever any official of either State is designated to perform any duty under this compact, such designation shall be interpreted to include the State official or officials upon whom the duties now performed by such official may hereafter devolve.
The physical and other conditions peculiar to the La Plata River and the territory drained and served thereby constitute the basis for this compact, and neither of the signatory States concedes the establishment of any general principle or precedent by the concluding of this compact.
This compact may be modified or terminated at any time by mutual consent of the signatory States and upon such termination all rights then established hereunder shall continue unimpaired.
This compact shall become operative when approved by the Legislature of each of the signatory States and by the Congress of the United States. Notice of approval by the Legislatures shall be given by the Governor of each State to the Governor of the other State, and the President of the United States is requested to give notice to the Governors of the signatory States of approval by the Congress of the United States.
IN WITNESS WHEREOF, The commissioners have signed this compact in duplicate originals, one of which shall be deposited with the Secretary of State of each of the signatory States.
Done at the city of Santa Fe, in the State of New Mexico, this 27th day of November, in the year of our Lord One Thousand Nine Hundred and Twenty-Two.
Delph E. Carpenter, Stephen B. Davis, Jr.
C.R.S. § 37-63-101