A plan to build a luxury event pavilion at Silverado Resort and Spa — one of Napa Valley’s best-known destinations for golf, weddings and corporate retreats — has run into resistance, not just from environmental advocates but from the county’s own Planning Commission, which on Wednesday postponed a decision after finding too many inconsistencies in the proposal.

The project calls for a 9,308-square-foot pavilion and a 1,750-square-foot lounge within a section of the resort’s golf course known as The Grove, an oak-lined area often used for outdoor events. Resort representatives say the upgrades would modernize the popular venue and continue a multimillion-dollar investment in the property.

But the proposal has drawn pushback for its plan to remove eight mature valley oak trees — despite a promise to plant 32 new ones — and for Napa County staff’s conclusion that the project is exempt from the California Environmental Quality Act.

Conservationist Kellie Anderson called the exemption “threading the needle” to avoid environmental review and said it was unacceptable to remove large, carbon-sequestering oaks for a private event space.

Others, including some nearby homeowners, praised the resort’s current owners, KSL Capital Partners, a Denver-based private equity firm that owns ski resorts, hotels and golf properties around the world, for reinvesting in Silverado. Former state Sen. Bill Dodd, who has lived in the community for two decades, told commissioners the project would strengthen the local economy and sustain property values. He said KSL has invested more than $20 million in the resort since acquiring it about three years ago and plans to spend another $30 million.

“This resort has continued to invest in its property, in its members,” Dodd said.

Commissioners said they were not ready to vote after receiving revised conditions of approval minutes before the meeting began. Several said the packet included conflicting information about wastewater plans and other project details.

“I am concerned that, because of my own confusion, maybe there could be public confusion,” Commissioner Molly Moran Williams said.

The panel took a 10-minute recess to review the last-minute revisions, then voted to continue the item to Nov. 5. Commissioner Pete Richmond abstained, citing a potential conflict of interest.

Commissioner Walter Brooks said he wanted the final proposal to spell out how the resort plans to connect to NapaSan’s wastewater system, rather than rely on the existing septic description included in the staff report.

“This package had a lot of issues and inconsistencies in it,” Brooks said. “The county’s on the way to resolving those, and that memo we got this morning was part of that.”

Several commissioners also asked Silverado representatives to look again at whether more of the oaks could be preserved. Commissioner Kara Brunzell — who is married to Press Democrat reporter Phil Barber — said replacing large, established trees with saplings wouldn’t adequately restore the grove’s carbon-storage value. Commissioner Megan Dameron countered that the resort is acting within its rights under county code to remove the trees, and that the replanting plan would ultimately expand the canopy over time.

The Planning Commission is expected to revisit the project Nov. 5.