Structure 121700011004166 · Montgomery County, TX

IH 45 Sbfr over W Fk San Jacinto River

Carries IH 45 Sbfr over W Fk San Jacinto River, 0.65 Mi N Of FM 1488.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,100 FT OVERALL200 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

1,100 ft end to end, longest span 163 ft: about 3.1 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.

Built199729 years old
Length1100.1 ft335.3 m
Daily traffic4,707counted 2023
Last inspectedAugust 2024every 24 months

Location

StateTexas
CountyMontgomery
Location0.65 Mi N Of FM 1488
CarriesIH 45 Sbfr
CrossesW Fk San Jacinto River
Coordinates30.24498, -95.45788

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length1100.1 ft (335.3 m)
Max Span163.1 ft (49.7 m)
Deck Width42.7 ft (13 m)
Deck Area4358.9 sq m
Main Spans3
Year Built1997

Traffic

Avg Daily Traffic4,707 (2023)
Truck Traffic4%
Lanes On Bridge3

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical6 — Scour calculated, stable
Structure Number121700011004166

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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