Structure 81660 · Buchanan County, IA

Local 325th ST over Mud CR

Carries Local 325th ST over Mud CR, 087102903.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 1 of 9.

How ratings work
Deck2/9 · Critical
Superstructuresets the rating1/9 · Imminent Failure
Substructure2/9 · Critical
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT101 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 2/9Superstructure 1/9 · sets the ratingSubstructure 2/9

101 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.

Built195373 years old
Length101.0 ft30.8 m
Daily traffic30counted 2022
Last inspectedDecember 2015every 12 months

Location

StateIowa
CountyBuchanan
Location087102903
CarriesLocal 325th ST
CrossesMud CR
Coordinates42.31900, -92.04584

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length101.0 ft (30.8 m)
Max Span49.9 ft (15.2 m)
Deck Width16.1 ft (4.9 m)
Deck Area150.9 sq m
Main Spans1
Year Built1953

Traffic

Avg Daily Traffic30 (2022)
Lanes On Bridge1

Inspection & Ownership

Last InspectionDecember 2015
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000000000081660

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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