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Commission flags stormwater, irrigation and county road-acceptance issues for pending minor subdivision
Summary
Planning commissioners discussed stormwater retention design, irrigation-ditch discharge, and a procedural problem over Cache County's acceptance of a new road entrance for a minor subdivision; staff said they will seek a letter from the county and schedule a Development Review Committee meeting to complete preliminary-plan review.
River Heights commissioners used the April 8 meeting to probe stormwater and drainage requirements for a proposed minor subdivision and to press staff for a procedural fix related to county road acceptance.
Stormwater and irrigation ditch concerns: Commissioners discussed developer plans to construct a retaining system to collect and slowly release runoff from new impervious surfaces into an existing irrigation ditch. Commissioners and staff noted the local soil profile (clay a few feet down) limits infiltration, so runoff must be detained and released at a controlled rate. Participants described two diversion points for the ditch that convey stormwater into Cobblestone or Stone Creek and observed that there is no direct outlet to Spring Creek in the area below Conservice.
Commissioners voiced caution about relying on neighboring subdivisions to accept additional stormwater and noted that the city's existing arrangement with Providence Logan Irrigation Company is informal in places. Cooley said River Heights should expect to negotiate with the irrigation company rather than individual subdivisions if the new development increases runoff volumes.
Cache County road acceptance and DRC timeline: The commission heard that the subdivision engineer is at an impasse because Cache County will not commit to accepting a road entrance until a permit application is submitted, and applications are typically prepared after construction drawings are complete. Staff reported the engineer recommended securing a letter from Cache County indicating conditional acceptance of an entrance pending permit approval; that letter would satisfy the intent of the city's current submittal requirement. City staff said they will ask county officials to provide such a letter and will schedule a Development Review Committee (DRC) meeting to finalize preliminary-plan review. The commission noted the subdivision review must meet internal timelines; staff said they aim to complete DRC review and the preliminary-plan milestone before the May 1 deadline.
Next steps: Staff and the applicant will pursue a written county letter addressing the road entrance, continue DRC review of the preliminary plan, and resolve stormwater design questions at an upcoming DRC meeting with Taylor (applicant) and the city's engineers.
