The hard-fought battle to put increased setbacks for new oil and gas drilling on the ballot has succeeded.

Now, the fight for votes begins between environmentalists who want oil and gas wells farther away from occupied buildings and Colorado’s influential petroleum lobby, which has warned that mandatory minimum 2,500-foot setbacks would devastate the state’s oil and natural gas industry. The proposed setback is an increase from current limits of 500 feet for homes and 1,000 feet for schools.

The organizers for Initiative 97 submitted 172,834 signatures. The Colorado Secretary of State’s Office said Wednesday that the initiative has qualified for the ballot with an estimated 123,195 valid signatures based on a random sample reviewed.

“I think that this is an issue that is increasingly on people’s radar,” said Anne Lee Foster, a ballot initiative proponent and volunteer organizer with Colorado Rising, the group pushing the effort. “This is something that the people of Colorado really care about. They want to protect the long-term welfare and quality of life in Colorado.”

Supporters of the increased setbacks point to the need for increased safety, especially after the house explosion last year that killed two people in Firestone. The explosion was from a leaky natural gas line that wasn’t properly capped.

Colorado Oil & Gas Association has said the impact on the industry would be crippling, leading to the loss of up to 147,800 jobs, weakened private property rights and less tax revenue.

“A half-mile setback is a blatant attempt by activists to ban oil and natural gas in Colorado and put working families on the unemployment line,” said Dan Haley, the association’s president and chief executive officer.

Getting the initiative on the ballot had its challenges. Colorado Rising had a public dispute with Oregon-based Direct Action Partners, the company it hired to help gather signatures, after the firm took about 15,000 signatures it gathered to Oregon amid a payment dispute. Those signatures were eventually given to Colorado Rising.

In another instance, organizers with Colorado Rising confronted a petition gatherer from Washington state who abruptly quit after working on the petition drive for less than a week in July. The gatherer was recorded by Colorado Rising without his knowledge, and he said he was leaving the state because “they’re going around buying people.” On the recording, which was provided to the media, the man wouldn’t say who paid him.