What actually goes wrong in the cold?
- The tank contents freeze, which takes the unit out of service and, on a job site, out of your OSHA count
- Pump trucks cannot service a frozen tank, so a missed window compounds into the next one
- Doors and latches freeze shut after a wet day followed by a hard overnight freeze
- Access roads become the binding constraint, particularly at elevation
- Hand sanitiser and liquid supplies freeze and burst
A frozen unit in January is a scheduling failure from November. Setting the winter service interval before the first hard freeze is what prevents it.
Where does it get cold enough to matter?
| City | Elevation | Winter condition to plan around |
|---|---|---|
| Incline Village, Washoe County | 6,350 ft | heavy Sierra snow load |
| Dayton, Lyon County | 4,442 ft | hard freeze-thaw cycling from November through March |
| Sparks, Washoe County | 4,415 ft | hard winter freezes requiring cold-weather servicing |
| Winnemucca, Humboldt County | 4,298 ft | winter lows near 10 degrees F |
| Lovelock, Pershing County | 3,977 ft | hard winter freezes |
| Fallon, Churchill County | 3,963 ft | hard winter freezes below 20 degrees F |
What is the TRPA winterization deadline?
The Tahoe Basin runs on a fixed calendar that has nothing to do with the forecast. TRPA restricts grading to May 1 through October 15. Outside that window, soil-disturbing activity such as excavating and backfilling is prohibited, and construction sites must be winterized.
The rule protects lake clarity by stopping sediment washing into stormwater systems during the wettest months and preventing soil compaction. A Grading Season Exception can be issued, but only where an emergency exists and the work is necessary for public health and safety, erosion control, or water quality protection.
TRPA Best Management Practices also apply year-round to temporary sanitation on Basin construction sites. Units must be anchored so they cannot overturn in high wind, and all sanitary waste must be removed by a licensed sanitary disposal service.
How do you prepare a unit for a Nevada winter?
- Charge the tank with a winter solution rated below your local overnight lows
- Increase service frequency rather than reducing it. A partially frozen tank gets worse, not better
- Site units where a pump truck can still reach them after snow, not only where they fit in October
- Keep units out of drifting wind and off low ground that collects meltwater
- Anchor against winter wind, which is stronger and more sustained than summer wind at elevation
- Move consumables that can freeze and burst into a sheltered position
