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Commission conditionally approves Gray Area's Cine Chamber for Minna Alley pending witnessed sound test
Summary
The San Francisco Entertainment Commission approved the Natoma stage and conditionally approved Gray Area Foundation for the Arts's Cine Chamber installation in the Minna Alley tunnel, requiring a city-observed sound test and other conditions aimed at limiting low-frequency bass leakage into neighboring residences.
Matthew Dryhurst, director of public programming for Gray Area Foundation for the Arts, told the commission the Cine Chamber is an outdoor sound-and-video installation planned for Minna Alley between Fifth and Mary streets on October dates and that the project's technicians ran an audio test with neighbors in the Chronicle Building.
The commission raised sustained concerns about low-frequency bass traveling through the concrete tunnel to nearby residences, especially Mint Plaza. Commissioner Joseph and other members questioned whether the proposal's containment measures'three layers of heavy 20-foot drapes, carpeting and internally oriented speakers'would prevent bass from transmitting through the concrete structure. Dryhurst said the team had agreed with the Chronicle Building to cap peaks at roughly 90 dB for the event and planned two to three technicians on site to monitor levels.
Dana Castro, property manager for the Chronicle Building, described a partnership between the building's owners, Gray Area and Intersection for the Arts and asked the commission to consider approving the separate Natoma stage independently because it posed less acoustic risk.
Commissioners and staff said the primary worry was low-frequency containment and the operational challenge of shutting down a 2,000-person event if it violated the city's sound rules. The commission voted to approve the artist stage and to conditionally approve the Cine Chamber installation, on the condition that a city inspector witness a follow-up sound test and sign off that the sound-control measures are adequate. If the witnessed test fails, the permit will not be finalized and the applicant must return to the commission.
The conditional approval included notification and standard permit conditions from staff; SFPD Southern Station had recommended approval with eight conditions in the staff memo. Dryhurst thanked the commission at the meeting's end.
The commission did not set a fine schedule in the public discussion but emphasized that any significant violation during the event could lead to shutdown and follow-up enforcement actions.
