Ashley Creek, and the summer it set the rules.

It runs across the eastern side of the city rather than through the middle of it. Checking National Hydrography Dataset flowlines against the 2020 Census place boundary on 7 August 2026, Ashley Creek enters Naples near the north edge, tracks southeast, and leaves at the southeast corner, covering roughly two miles inside the city limits. It is the only named watercourse in Naples. Most of that length is private ground, irrigation works and ditch bank, and there is no public riverside path.

The Ashley Valley Water and Sewer Improvement District, not Naples City. The district supplies culinary water and sewer to all of Uintah County except Vernal City, which runs its own municipal system. Per the Naples 2021 general plan the district maintains more than 5,000 service connections and over 160 miles of culinary line, plus more than 80 miles of sewer line, over 1,200 manholes, five lift stations and two siphons. Some parcels on the edges of the city run on a private well and septic instead.

Drought. The Ashley Valley Water and Sewer Improvement District held a public rate hearing on 29 April 2026 covering drought, allotments, restrictions and summer rates, and its board adopted a conservation rate structure: 20.50 dollars for the first 6,000 gallons, 2.50 per thousand for the next ten thousand, and 22.00 per thousand above 32,000 gallons. The base was lowered and heavy outdoor use was deliberately priced up. The structure was written to be temporary, with a reduction planned for 31 October 2026 if the supply allowed.

Its manager, Ryan Goodrich, put a quarter acre at about 3,000 gallons a month under the 2026 conservation rates, and was candid about the result: in his words it will not be green, it will not be pretty, but it will survive. That is a conservation target rather than a horticultural recommendation, and it was set in a specific drought year. Ask the district for the current guidance and the current rate card at ashleywatersewerut.gov or on 435-789-9400 before you plan a garden around it.

Parts of it are exposed, and the city says so itself. The 2021 general plan reports that land use is constrained mainly in the south and east of the city because of expansive soils and the potential for flooding, and that roughly eight percent of the city's dwelling units sit in hazard risk areas, holding 137 residents, 149 jobs and 429 acres. The plan also flags that FEMA was developing new floodplain modelling, and states plainly that a recalculation of flood potential could significantly affect many properties. Check the current FEMA panel for a specific parcel with the county.

A watershed protection project sponsored by Uintah County with funding from the USDA Natural Resources Conservation Service under Public Law 83-566. NRCS and the county issued a Finding of No Significant Impact on 25 May 2023. It builds two debris and detention basins for the Coal Mine and Yellow Hills sub basins in the foothills of Little Mountain about 4.3 miles west of Vernal, pipes 9.6 miles of the Ashley Central Canal with 6.3 of that pressurised, and adds three miles of recreation trail. Total installation cost was put at 19,601,669 dollars, and Naples City is a named beneficiary.

It varies more than almost anything else in this valley. At the gage on the lower creek near Stewart Lake, discharge has ranged from 0.03 cubic feet per second in late summer to 4,300 during spring runoff, with an annual mean of 67.5 over 1992 to 2001. That is the normal behaviour of a snowmelt stream off a high range. Steinaker Dam, three and a half miles north of Vernal, impounds 38,000 acre feet and can temporarily hold nonproject Ashley Creek flows to reduce flood peaks when there is room.

There is a documented record, and it concerns the lower creek and the wetlands near Jensen rather than Naples. Federal studies found selenium in the lower reach running 25 to 75 micrograms per litre and attributed roughly 85 percent of that load to leakage from the Vernal sewage lagoons, built in 1981 on Mancos Shale east of the creek. Utah's health department issued a fish and waterfowl consumption advisory for the area on 26 September 1988, and remediation ran from 1997 to 2001. Treat the published account as history and take current questions to the state.

Four things, and all of them have published answers. Which FEMA flood zone the parcel sits in today and whether that panel is being redrawn. Whether irrigation or ditch shares attach to the land and whether they convey with the sale, because in this valley they often do not. Whether a ditch, lateral or drain crosses the parcel and who holds the right of way and the maintenance duty. And whether the address is on the district's water and sewer or on a private well and septic, which changes at the parcel rather than at the street.