Structure SA0800000000201 · Carroll County, MS

CR 105 over Unknown Creek

Carries CR 105 over Unknown Creek, Sec 19 T21n R 3e.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating4/9 · Poor
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
20 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 4/9 · sets the rating

20 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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.

Built198739 years old
Length20.3 ft6.2 m
Daily traffic25counted 2015
Last inspectedAugust 2024every 12 months

Location

StateMississippi
CountyCarroll
LocationSec 19 T21n R 3e
CarriesCR 105
CrossesUnknown Creek
Coordinates33.66978, -90.02472

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length20.3 ft (6.2 m)
Max Span20.3 ft (6.2 m)
Deck Width20.7 ft (6.3 m)
Deck Area39.1 sq m
Main Spans1
Year Built1987

Traffic

Avg Daily Traffic25 (2015)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure NumberSA0800000000201

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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