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I. . . . (b) Or all other days Colorado shall deliver to New Mexico a qU,antity of water equivalent to one-half of the mean flow at Hes~erns fOl' the preceding day, but in no event shall be required] to deliver more than 100 cubic feet per second. . (3) The ettremely low flow of the river may be rotated be- tween users in t~e two States for such periods and for such times as the State E~gineers may hereafter determine. . (4) Colo~*do shaIl not at any time be required to deliver any water to N1. w Mexico not then necessary for beneficial use in that State. . (5) Subs~ntial compliance with tbe provisions of the arti- cle shall be sU'1'cient. Article III provides that the State Engineers of the two States may formulate Tules and regulations for carrying out the provi- sions of the c;,: mpact, which shaIl binding until amended or abrogated. . Article V rovides that the compact shall not establish any general prinCiJIt or precedent and is based upon the facts pecu- liar to the stre m. ; By Article I I the compact may be modified or terminated at any time by m'1tual consent. I i I FURTHER COMMEN'r i The La Pl~ta Riv(Jr rises in the mountains of Colorado and flows south iuto New Mexico, where it joins the San Juan. It has a rapid flow a~d has eroded a deep valley. It passes through table lands fro. Whi.Ch tributary waters enter through gulches and arroyos. ost of the water supply' comes from the high mountains, but a considerable flow enters the stream from the mesa areas in olorado. There is a considerable flow of waste and return waters from the irrigated lands between Hesperus and the Interstpte Line. This flow will increase with expansion of the irrigateq area in Colorado. A consid. er;'ble part of the irrigation in New Mex. ico was prior to that in ColOlado. Most of the Colorado area was a part of the Ute Indian Re ervation during the development iu New Mexico. The Colorado ~ea was developed, in large part, after the reser- vation was ope ed for settlement. The diversions in New Mex- ico aggregate a out 120 cubic feet per second, but there is about 20 second feet Sf increment to the flow of the river (in New Mex- ico) from seep~ge and .waste. The major Ipart of the fl,ow from the mountains in Colorado passes the villa' e of Hesperus. Between Hesperus and the. Inter- state Line vari us gulches and arroyos deliver more or less water. With the openig of Spring, the snows on the lower mesas are the [ 4 ]