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findings. After remand, the Court held that Colorado had not met <br />its burden of proving that a future diversion by it should be <br />permitted. <br />D. Water Exports <br />Wanting to retain the right to use its full allocations of inter- <br />state streams and all of its intrastate waters, the State of Col- <br />orado has historically restricted the export of surface and <br />ground water. The recent case of Sporhase v. Nebraska, 458 U.S. <br />941 (1982), which struck down a Nebraska statute prohibiting the <br />export of ground water to states that did not grant reciprocal <br />rights to export water into Nebraska, cast serious doubt on the <br />constitutionality of state limitations on the export of water. <br />The court held, first, that water was an article of commerce and, <br />second, applying the strict commerce clause scrutiny reserved for <br />facially discriminatory state legislation, that Nebraska's reci- <br />procity requirement imposed an impermissible burden on interstate <br />commerce. Finally, the court held that, while Congress could <br />consent to what would otherwise be impermissible regulation of <br />commerce by the states, it had not done so for the statute in <br />question. ' <br />As a result of Sporhase, in 1983, the General Assembly revised <br />Colorado's export statutes to tie them more closely to Colorado's <br />entitlements under congressionally approved compacts and United <br />States Supreme Court decrees. <br />Prior approval of the water court or appropriate administrative <br />agency is required before water may be exported from Colorado. <br />Section 37-81-101, C.R.S. (1985 Supp.). However, rather than <br />forbidding the export of water, the statutes now seek to ensure <br />that Colorado receives credit for waters exported to other states <br />and that no exports are approved that will interfere with <br />Colorado's ability to meet its obligations under compacts or de- <br />crees. Sections 37-81-101 and 103, C.R.S. (1985 Supp.). The At- <br />torney General has a statutory duty to bring an action to enjoin <br />any unauthorized export of water. Section 37-81-102, C.R.S. <br />(1985 Supp.). <br />In 1985, legislation was enacted to require the state engineer to <br />assess and collect a "fee" of fifty dollars per acre-foot on wa- <br />ter exported from Colorado. Section 37-81-104, C.R.S. (1985 <br />Supp.). The Attorney General opined that imposition of this ex- <br />port tax would violate the interstate compacts and decrees to <br />which Colorado is a party and would also be unconstitutional. <br />The state engineer has not sought to enforce the statute. <br />-23-