Frost Line Depth in Tooele County, Utah
- Tooele County’s adopted code
- Checked Oct 2026
- Sources
Verified
30in
76 cm · 2 ft 6 in
30 in or More by Location
Set in the building code Tooele County has adopted.
Source and how we checked
Document: tooeleco.gov
Climate: 165 nights a year at or below 32 °F (NOAA 1991–2020, Dugway, 22.3 mi).
Checked Oct 2026. Report a correction
How deep is the frost line in Tooele County?
Tooele County's building authority sets the frost line depth at 30 in (76 cm), or more depending on location. Footings, piers and other permanent supports must reach at least this depth (IRC R403.1.4.1).
Who sets the frost line depth in Tooele County?
Utah leaves the frost line depth to each city or county, and Tooele County fills it in when it adopts the residential code. The value above comes from Tooele County’s own document on tooeleco.gov. See how Utah sets frost line depth.
How deep do footings, decks and water lines need to be in Tooele County?
House or garage footing in Tooele County: dig at least 30 in (76 cm). Below the frost line and at least 12 in deep (IRC R403.1.4).
| Project | Depth | Rule |
|---|---|---|
| House or garage footing | 30 in | Below the frost line and at least 12 in deep (IRC R403.1.4) |
| Deck footing (attached) | 30 in | Below the frost line and at least 12 in deep (IRC R507.3) |
| Water service line | 36 in | 6 in below the frost line and at least 12 in deep (IRC P2603.5) |
| Fence post bottom | 30 in | No code rule; common practice is below the frost line |
Work out posts, concrete and footing sizes with the fence post depth calculator or the deck footing calculator.
How cold does it get in Tooele County?
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Average lows are at or below freezing from Nov to Mar. 165 nights a year reach 32 °F or colder; Dec is coldest, with an average low of 15.8 °F.
NOAA 1991–2020 climate normals, Dugway station, 22.3 mi away, elevation 4,345 ft.
Monthly temperatures as a table
| °F | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Low | 16.5 | 23.1 | 28.9 | 35 | 43 | 52.7 | 60.7 | 59.1 | 47.6 | 34.4 | 24.6 | 15.8 |
| High | 39.7 | 46.5 | 56.9 | 63.8 | 74.5 | 86.8 | 96 | 93.7 | 82.7 | 67.2 | 51.8 | 39.5 |
Tooele County has more freezing nights than 19 of the 25 other Utah places we track. The Utah median is 118. Coldest: Summit County; mildest: St. George.
What frost line depth do towns near Tooele County use?
5 official codes near Tooele County are verified; each links to its document.
| Place | Verified frost line | Distance |
|---|---|---|
| Herriman | 30 in | 58 mi away |
| Eagle Mountain | 30 in | 59 mi away |
| West Jordan | 30 in | 60 mi away |
| South Jordan | 30 in | 60 mi away |
| Riverton | 30 in | 61 mi away |
How likely is the soil in Tooele County to heave?
USDA rates the sampled soil around Tooele County as 70% low, 30% high for frost action (main soils: Tooele, Playas, Yenrab).
USDA NRCS soil survey, 9 sample points within 2 mi. Higher frost action means more risk of heave; see frost heave.
How do you confirm the frost line before you dig in Tooele County?
Tooele County at a glance
- Frost line depth
- 30 in or More by Location
- Population (2023 est.)
- 82,051
- Mean annual temperature
- 51.7 °F
- ZIP codes (8)
- 84022 · 84029 · 84034 · 84069 · 84071 · 84074 · 84080 · 84083