Pima County will not revoke a flood-plain use permit that allows California Portland Cement to build a haul road across Davidson Canyon.
Supervisor Ray Carroll, whose district includes the canyon southeast of Tucson, had asked the county to take back the permit after the state declared Davidson Canyon an "outstanding Arizona water," deserving of the highest levels of protection under state law.
Portland Cement plans to mine limestone in the canyon under a mineral lease from the state Land Department.
Pima County officially opposes the mine plan and supports the outstanding water designation, but that didn’t stop county officials from issuing a flood-plain use permit earlier this year. County Administrator Chuck Huckelberry said the county had no choice but to issue the permit because the cement company complied with the necessary regulations.