Ada County approves modified River Ridge RV park plan amid neighborhood odor and traffic concerns

Ada County commissioners voted on Feb. 11 to conditionally approve modifications to the previously authorized River Ridge RV park, a 310-space project south of Boise near the World Center for Birds of Prey.

Staff presented the proposal to replace an earlier septic plan with a micro-batch reactor sewage-treatment system, enclose the treatment equipment in a building, demolish and replace the existing 2,870-square-foot clubhouse with a new 5,000-square-foot structure, and revise phasing, streets and curb sections (Brent Danielson, staff). The county engineer has approved alternative base materials for some road sections, and fire flows and hydrant locations were approved by Boise Fire on behalf of the Willow Fire District, staff said (Brent Danielson, County staff).

The applicant, represented by Sebastian Griffin, said the changes are meant to improve operations and neighborhood safety: "We're gonna demolish it and build new," he said of the clubhouse, adding the enclosed treatment building and revised curbs are intended to benefit both park visitors and neighbors (Sebastian Griffin, applicant). Griffin said the park will include a range of sites, with lower-tier, lower-cost spaces intended to remain available for students or workers.

Neighbors and nearby residents raised concerns about odor from on-site treatment and the capacity of local roads. John Rapp, a nearby resident, said neighborhood opposition to the RV park continues in principle but that the latest plans addressed some concerns; other residents warned that the narrow rural roads were not designed for heavy RV traffic and said construction noise during lead remediation had been disruptive (John Rapp, resident; Kelly Devine, resident).

County staff and the applicant presented technical assurances. Kevin Farrell, River Ridge Engineering, explained the proposed treatment approach and quality: "All the raw sewage will be collected below grade, and then it goes into the treatment facility. It's what they call class A recycled water," he said, adding the treated water would be reused for on-site irrigation and that the system is an upgrade from the previously proposed large septic drain-field approach (Kevin Farrell, River Ridge Engineering). Staff also noted the development agreement and specific conditions must be finalized; the board approved the project subject to those updates being completed at the Feb. 24 open business meeting.

The board’s action combined approval of the conditional use and master site plan with a direction to staff to finalize the development-agreement modification and the draft findings of fact and conclusions of law for the project. Commissioners cited the project’s upgraded treatment system and the applicant’s commitments to construction standards and mitigation but reserved final sign-off on the development-agreement edits.

What happens next: staff will update the development agreement and findings and present them at the Feb. 24 open business meeting for final action. The applicant told the board they anticipate making the project shovel-ready within months and beginning phase one rentals early next year.

Provenance: Staff presentation and discussion (SEG 2045–SEG 2157); applicant comments and public testimony (SEG 2179–SEG 2510); technical engineer presentation (SEG 2593–SEG 2650); motion and direction to finalize documents (SEG 2679–SEG 2727).