Mona planning staff green-light preliminary plat for East Hill Meadows with conditions

Mona City planning and zoning staff and commissioners provisionally approved the preliminary plat for the East Hill Meadows subdivision Wednesday, contingent on three items the developer must provide before final plat approval.

The planning authority voted to accept the preliminary plans for East Hill Meadows with contingencies requiring: a letter from the irrigation company approving use of the subdivision pond for secondary (irrigation) water; a homeowners association agreement that relieves the city of maintenance responsibility for the detention pond; and final sign-off from the engineering review (Jones & DeMille was the consulting firm cited in the submittal).

The contingency structure was presented during a work session where staff and the developer reviewed utility, drainage and lot-layout details. Planning staff asked the developer to show the grading, utility profiles and sanitary sewer profiles; the developer noted the sewer profile met the state minimum grade at one connection point. Staff also flagged a missing HOA agreement required by city code to confirm the HOA will operate and maintain the pond and to provide the city emergency access.

Commissioners and staff discussed a set of practical details developers and future homeowners will need to accept. Staff and the developer explained Lot 5 will retain street frontage on 750 East and will include a 30-foot irrigation/pond-access easement that reduces effective frontage; the plans show the easement on the recorded plat. The developer said Lot 5’s existing frontage is about 75 feet, which the city’s subdivision rules require for lot buildability.

Water supply and irrigation were a recurring issue. The developer and staff described a shared pond, a meter and float-valve control and a lift station that will pump irrigation water from the pond up to the lots. Staff and commissioners warned that secondary water availability depends on the irrigation company’s turn schedule and drought conditions; they emphasized the HOA and irrigation company must clarify operational responsibilities and access in writing. Planning staff also identified a need for an irrigation-company signoff and said Rocky Mountain Power signoff will be required for electrical service design before final approval.

Engineering reviewers raised questions about the culinary water modeling included with the application. Staff said the developer submitted a limited hydraulic model segment built from node data in the city master plan; city engineering requested either access to the full Jones & DeMille model or verification from the city water model to confirm pressures and flows. The developer said the submitted model was intended to demonstrate that five lots would not materially change system pressures.

After the discussion, a commissioner moved to approve the preliminary plat subject to: (1) a signed irrigation-company letter approving the pond as a source of secondary water, (2) an HOA agreement that clarifies maintenance and relieves the city of routine pond responsibility, and (3) satisfactory results of the engineering study. The motion was seconded and approved by recorded votes.

Next steps: staff said the developer may obtain preliminary-plat approval with those conditions, then work with the irrigation company and complete final engineering for full final-plat review. Staff noted state timelines apply to the review sequence: the city has a 30-day clock for an initial review and applicants have up to 180 days under recent state legislation to respond before re-filing. The developer was asked to return HOA and irrigation agreements and the final engineering comments before the final plat is scheduled for approval.