Structure 6694 · Miller County, MO

Bagnell Dam BLVD S over Bagnell Dam

Carries Bagnell Dam BLVD S over Bagnell Dam, S 29 T 40 N R 15 W.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT2,583 FT OVERALL500 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 6/9

2,583 ft end to end, longest span 60 ft: about 7.2 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.

Built1929rebuilt 1983
Length2583.0 ft787.3 m
Daily traffic3,530counted 2024
Last inspectedJune 2024every 24 months

Location

StateMissouri
CountyMiller
LocationS 29 T 40 N R 15 W
CarriesBagnell Dam BLVD S
CrossesBagnell Dam
Coordinates38.20337, -92.62521

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length2583.0 ft (787.3 m)
Max Span60.0 ft (18.3 m)
Deck Width25.9 ft (7.9 m)
Deck Area6219.7 sq m
Main Spans13
Year Built1929 (reconstructed 1983)

Traffic

Avg Daily Traffic3,530 (2024)
Truck Traffic7%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerPrivate
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number6694

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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