Structure 121700033802083 · Montgomery County, TX

SH 105 over Bnsf Rr

Carries SH 105 over Bnsf Rr, 0.25 Mi NE Of FM 1486.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT365 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

365 ft end to end, longest span 65 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.

Built1948rebuilt 1994
Length365.2 ft111.3 m
Daily traffic9,967counted 2023
Last inspectedSeptember 2024every 24 months

Location

StateTexas
CountyMontgomery
Location0.25 Mi NE Of FM 1486
CarriesSH 105
CrossesBnsf Rr
Coordinates30.36812, -95.77335

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length365.2 ft (111.3 m)
Max Span65.0 ft (19.8 m)
Deck Width46.9 ft (14.3 m)
Deck Area1591.6 sq m
Main Spans3
Year Built1948 (reconstructed 1994)

Traffic

Avg Daily Traffic9,967 (2023)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour CriticalNot applicable
Structure Number121700033802083

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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