Structure 4892 · Montgomery County, AR

Thunder Mtn RD - E over So. Fork Caddo River

Carries Thunder Mtn RD - E over So. Fork Caddo River, 0.80 Mi. SE Jct Co. Rd. 5.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT374 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 7/9 · sets the rating

374 ft end to end, longest span 80 ft: about 5 semi-trucks nose to tail. 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.

Built200719 years old
Length374.0 ft114 m
Daily traffic225counted 2018
Last inspectedJuly 2024every 48 months

Location

StateArkansas
CountyMontgomery
Location0.80 Mi. SE Jct Co. Rd. 5
CarriesThunder Mtn RD - E
CrossesSo. Fork Caddo River
Coordinates34.35965, -93.60865

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length374.0 ft (114 m)
Max Span80.1 ft (24.4 m)
Deck Width26.9 ft (8.2 m)
Deck Area934.8 sq m
Main Spans5
Year Built2007

Traffic

Avg Daily Traffic225 (2018)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 48 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number000000000004892

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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