UPDATE 1-Voters in 3 U.S. states reject initiatives to curb fossil fuel use

(Adds details on Washington and Nevada measures, background)

Nov 7 (Reuters) - Voters in Colorado, Arizona and Washington states rejected ballot initiatives that sought to curb fossil fuels use by restricting drilling, putting a fee on carbon emissions and mandating wider use of renewable energy.

The results were a setback for green activists, but a win for the energy industry and the Trump administration, which had sought to unfetter oil, gas, and coal production by rolling back environmental protections.

The outcomes showed "voters reject policies that would make energy more expensive and less reliable to them, their families, and the larger economy," said Thomas J. Pyle, president of free market advocacy group American Energy Alliance.

While polls had indicated rising concerns among Americans over carbon emissions and water quality, the measures on the ballot in the three states to rein in fossil fuels industries were soundly rejected on U.S. Election Day on Tuesday.

In Colorado, an initiative to limit new drilling near populated or vulnerable areas, which would have heavily curtailed the industry, received 43 percent of the vote, less than the majority required to pass.

The Washington state measure, meanwhile, which would have imposed the nation's first fee on carbon emissions - mostly at the expense of the state's oil refiners - garnered only 44 percent of the vote.

Groups defending the oil industry spent a combined $66 million to defeat the Colorado and Washington measures, with much of the contributions coming from large energy companies - including BP Plc and Marathon Oil Corp unit Andeavor.

Washington state's measure, meanwhile, was supported by millions of dollars in contributions from Microsoft co-founder Bill Gates and an alliance of other billionaires and environmental groups.

In Arizona, voters defeated a proposal backed by billionaire activist Thomas Steyer that would have required electricity providers to use renewable energy for half of their needs by 2030, up from the current 15 percent.

The measure was opposed by Arizona Public Service Co , the states largest utility, which argued it would be forced to shut coal and nuclear plants, and pass along those costs to customers.

A similar measure in Nevada passed, which clean energy advocates said was likely to bolster investment in the state's already fast-growing solar industry.

DRILLER SHARES JUMP

Shares in oil producers operating in Colorado rallied on Wednesday after the state's proposed drilling restrictions failed. Anadarko Petroleum Corp gained 6.3 percent and Noble Energy Inc jumped 5.6 percent.

"We think the wide margin of victory matters and that it will serve as a deterrent to those who might otherwise decide to fund another round of opposition to the industry in the next election cycle," Capital One Advisors wrote in a Wednesday note about the Colorado measure.

Colorado's proposal would have required new oil wells to be at least 2,500 feet (762 m), five times the current minimum separation, from occupied or sensitive areas, effectively placing much of the state off-limits to new drilling.

"We are proud of our thousands of volunteers who fought 'til the very end to protect their communities," said Russell Mendell, of anti-fracking group Colorado Rising, which backed the measure. "We will not stop until our Colorado neighborhoods are safe from this dangerous industrial activity."

But opponents, including Colorado municipal officials, warned that the measure would have cost the state's economy billions of dollars, and would have reduced funding for roads, schools and public safety.

"The oil and natural gas industry and its employees look forward to discussing concerns with reasonable people looking for reasonable solutions, said Karen Crummy, communications director for Protect Colorado, a group backed by oil companies that opposed the measure. (Reporting by Liz Hampton and Gary McWilliams in Houston; Writing by David Gaffen; Editing by Jeffrey Benkoe)