Structure 255931 · Montgomery County, IA

Local Road over Minor Drainage

Carries Local Road over Minor Drainage, 072393301.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 3 of 9.

How ratings work
Deck4/9 · Poor
Superstructure5/9 · Fair
Substructuresets the rating3/9 · Serious
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT118 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9Superstructure 5/9Substructure 3/9 · sets the rating

118 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 through truss.

Built1930rebuilt 1993
Length118.1 ft36 m
Daily traffic61counted 2021
Last inspectedMay 2024every 12 months

Location

StateIowa
CountyMontgomery
Location072393301
CarriesLocal Road
CrossesMinor Drainage
Coordinates41.00173, -95.34047

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length118.1 ft (36 m)
Max Span89.9 ft (27.4 m)
Deck Width21.7 ft (6.6 m)
Deck Area237.6 sq m
Main Spans1
Year Built1930 (reconstructed 1993)

Traffic

Avg Daily Traffic61 (2021)
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number000000000255931

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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