| http://www.w3.org/ns/prov#value | - ce of water upon the land to be irrigated: Provided, That after such an investigation he shall find all the essential conditions relative to the water supply and to the perpetuity of its availability for use upon said lands such as in his judgment will justify a contract for its perpetual use: Provided further, That the Secretary of the Interior, upon making all such contracts, shall require from
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