Structure P00052049+01981 · Flathead County, MT

S 35 over Flathead River

Carries S 35 over Flathead River, 2m E Kalispell.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT884 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 7/9

884 ft end to end, longest span 233 ft: about 2.5 football fields. Lengths and the semi-truck 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.

Built199432 years old
Length883.9 ft269.4 m
Daily traffic11,074counted 2023
Last inspectedSeptember 2024every 24 months

Location

StateMontana
CountyFlathead
Location2m E Kalispell
CarriesS 35
CrossesFlathead River
Coordinates48.22152, -114.24238

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length883.9 ft (269.4 m)
Max Span232.9 ft (71 m)
Deck Width48.2 ft (14.7 m)
Deck Area3960.2 sq m
Main Spans4
Year Built1994

Traffic

Avg Daily Traffic11,074 (2023)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical4 — Foundations need monitoring
Structure NumberP00052049+01981

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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