Structure 17055C · Garfield County, UT

County Road over Mammoth Creek

Carries County Road over Mammoth Creek, 9 Miles Sw. Of Hatch.

Overall conditionFair

Set by its lowest-rated component: Deck at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructure6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT70 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 6/9

70 ft end to end. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built201016 years old
Length69.9 ft21.3 m
Daily traffic63counted 2010
Last inspectedJuly 2024every 24 months

Location

StateUtah
CountyGarfield
Location9 Miles Sw. Of Hatch
CarriesCounty Road
CrossesMammoth Creek
Coordinates37.61028, -112.55750

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length69.9 ft (21.3 m)
Max Span66.9 ft (20.4 m)
Deck Width27.9 ft (8.5 m)
Deck Area181.1 sq m
Main Spans1
Year Built2010

Traffic

Avg Daily Traffic63 (2010)
Truck Traffic1%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number017055C

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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