WSP07166

• File Number: 8509
• Description: San Luis Valley
• State: CO
• Basin: Rio Grande
• Water Division: 3
• Date: 8/1/1941
• Title: History of the Irrigation from the Costilla River
• Water Supply Pro - Doc Type: Report/Study

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owned by the Water company from which the Jaroso colony
could be supplied. These lIe:re.
(a) The old direct rights owned by the Water company;

and,
'(0) The Eastdala rights.
In order to supply the Jaroso colony with
~ater from the, old direct rights, irrigation of lands
under- the Acequia Jdadre, Llanzanares and MadrU'U Dit.i!hes
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flv): .....~~' was cut down; For a time these old direct di tches
a-,t~~
4 <>It.--" furnished the chief source of -water fon the Jaroso cclony.
Then came a new development in the history of the CostIlla
River water rights, which wIll now bediscuased.
In 1911 the Water company filed an application
wfth the Territorial Engineer of new Uexico for the
construction of a large reservoir high up in Costilla Canyon.
Thi~reservoir is known a~ the Costilla Reservoir. Its
construction was completed about 1920. It is a stream bed
reservoir and, the water therefrom is let back into the st~eam
and carried down toa point on the South side of the Costil-
la River, opposite the in~e of the Acequ1aMadre Ditch.
At this point a 1atge canal known as the Cerro Ditch diverts
the "atllr and carries it totth.. lands to be irrigated.
By reference to ~~bit C, it will be noted
that the Cerro Ditch from its headgate runs L~ a generally
northwesterly direction to II point on the New Mexia>Colorado
boundary line. This is the point where Lateral 2 reaches
the state bOundary line. From this po1n~ Lateral 2, ex-
tending southwesterly, carries the water of the Cerro Ditch
to numerous laterals In>own respeotively as M-l, M~2, etc.
These laterals carry the Cerro Ditch water to the lands in
!Iew llexico to be irrigated by means of the Cerro Di tch.
A t this point of junction of the Cerro DitCh

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