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Planning commission approves clearer noise rules, monitoring for Grove House events
Summary
The commission approved amended conditions for the Grove House conditional use permit allowing outdoor amplified events (up to four/week, 7 a.m.–10 p.m.) subject to property‑line averaged limits, a peak cap of 85 dBA, real‑time monitoring, and an on‑site sound manager; the vote was unanimous.
The Mariposa County Planning Commission voted to approve amended conditions for the Grove House conditional use permit, allowing limited outdoor amplified events while imposing numeric, enforceable noise limits and monitoring requirements.
Planning Director Steve Engford summarized staff’s recommendation and the technical basis for the conditions, telling commissioners the amendment would permit up to four outdoor special events per week between 7 a.m. and 10 p.m., with property‑line averaged sound limits: an LAEQ averaged limit of 75 dBA at monitoring position 1 and 70 dBA at positions 2 and 3, and a maximum instantaneous LMAX peak limit of 85 dBA. “We combine the numeric property‑line limits with real‑time monitoring and speaker direction requirements for enforceability,” Engford said, describing three monitoring locations and an event log and complaint process that would allow the county to require mitigation or limit events if objective evidence shows a violation.
The applicant, identified in the hearing as Nate, said he currently operates three days a week, closes by 10 p.m. and does not expect to hold four outdoor events in most weeks. “I close every single night by 10PM. I have never gone over 10PM,” Nate said, and told the commission he has worked with neighboring businesses and would remain responsive to complaints.
Several business and community representatives, including Carrie Cassella of the Mariposa County Chamber of Commerce, said occasional larger events bring guests who fill local hotels and restaurants. Beverly Andalora said the Grove House “provides a great benefit to the community.”
Commissioners asked about enforcement and neighborhood complaints. Engford explained the conditions require an on‑site sound manager who can be contacted if sound appears excessive, continuous monitoring with logged LAEQ averages, and a process (staff review and potential CUP modification or revocation) if monitoring and complaints demonstrate a continuing violation. He emphasized that monitoring technology enables real‑time control of directional speaker systems.
A commissioner moved to adopt the amended conditions as written, another seconded, and the motion carried unanimously.
The commission’s action approves the amended CUP conditions and directs staff to file the required CEQA notice of exemption for the action. The conditions require monitoring and recordkeeping and give the county a path to require further mitigation or to refer the matter back to the commission if necessary.
