Structure 121700353801391 · Montgomery County, TX

SH 242 WB over San Jacinto River

Carries SH 242 WB over San Jacinto River, 3.60 Mi E Of Ih45.

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 overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
4,781 FT OVERALL1,000 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 7/9 · sets the rating

4,781 ft end to end, longest span 120 ft: about 13 football fields. 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 bridge of this kind.

Built20215 years old
Length4780.8 ft1457.2 m
Daily traffic47,121counted 2023
Last inspectedDecember 2024every 24 months

Location

StateTexas
CountyMontgomery
Location3.60 Mi E Of Ih45
CarriesSH 242 WB
CrossesSan Jacinto River
Coordinates30.21076, -95.39768

Physical Characteristics

MaterialOther
DesignOther
Total Length4780.8 ft (1457.2 m)
Max Span120.1 ft (36.6 m)
Deck Width59.7 ft (18.2 m)
Deck Area26521.0 sq m
Main Spans47
Year Built2021

Traffic

Avg Daily Traffic47,121 (2023)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number121700353801391

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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