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Planning Commission approves White Rock Phase 4 preliminary plat; geologic constraints noted
Summary
Commission approved a 12-lot preliminary plat for White Rock Subdivision Phase 4, with staff noting geologic-hazard mapping, restricted lots where a fault was identified, and a pedestrian trail along North Ogden Divide Road to the property edge.
The Planning Commission on Feb. 11 granted preliminary plat approval for Phase 4 of the White Rock Subdivision, a 12-lot final phase that connects Mountain Road and 3090 North. Staff recommended approval after technical review and said lot sizes meet the Hillside Protection (HP-2) zone minimums.
Scott Hess and staff explained the property lies within an alluvial-fan area and that the developer provided a geologic-hazards study and trenches that identified a fault trace crossing portions of the subdivision; the staff report and plat include notes and restrictions for lots that are crossed by or adjacent to the interpreted fault. Hess said lots 401–405 are marked with development restrictions to limit cuts/fills, prevent undermining of North Ogden Divide Road and reduce other excavation risks. The geotechnical report and related notes will be recorded with the plat and are available to prospective buyers and permit reviewers.
Commissioners raised questions about buildable areas on Lots 410 and 411, where steep slopes could complicate placement of structures and driveways; staff and the applicant’s engineer said the phase is flatter than an earlier phase and that some lots may require tailored grading, retaining structures or adjusted setbacks at the building-permit stage. Staff reiterated that the planning commission’s preliminary-plat approval entitles the general roadway configuration, number of lots and right-of-way widths but that final engineering and lot-level geotechnical review will govern what can be built on each lot.
Staff also described a trail along North Ogden Divide Road (behind the guardrail) that will be provided to the property edge as part of the phase; the plat will construct trail improvements up to the development’s property line and preserve the possibility of additional connections to the south pending adjacent owners and county coordination.
The commission approved the preliminary plat with standard conditions drawn from the TRC memo and engineer’s report; staff noted the geotechnical report will be referenced on the plat as a recorded document.
