Structure L02332000+02001 · Big Horn County, MT

Frontage Road 332 over Lodge Grass Creek 070

Carries Frontage Road 332 over Lodge Grass Creek 070, S Lodge Grass.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT64 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

64 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 tee-beam bridge.

Built201511 years old
Length64.0 ft19.5 m
Daily traffic45counted 2023
Last inspectedAugust 2023every 24 months

Location

StateMontana
CountyBig Horn
LocationS Lodge Grass
CarriesFrontage Road 332
CrossesLodge Grass Creek 070
Coordinates45.31006, -107.36101

Physical Characteristics

MaterialPrestressed Concrete
DesignTee Beam
Total Length64.0 ft (19.5 m)
Max Span61.7 ft (18.8 m)
Deck Width23.3 ft (7.1 m)
Deck Area138.4 sq m
Main Spans1
Year Built2015

Traffic

Avg Daily Traffic45 (2023)
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure NumberL02332000+02001

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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