Structure 120200D00920001 · Brazoria County, TX

Old Galveston RD over Mustang Bayou

Carries Old Galveston RD over Mustang Bayou, 0.10 Mi E Of Bus 35.

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
CAR · 15 FT110 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 7/9 · sets the rating

110 ft end to end. Lengths and the car 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 slab bridge.

Built201511 years old
Length109.9 ft33.5 m
Daily traffic742counted 2010
Last inspectedDecember 2023every 24 months

Location

StateTexas
CountyBrazoria
Location0.10 Mi E Of Bus 35
CarriesOld Galveston RD
CrossesMustang Bayou
Coordinates29.42509, -95.24190

Physical Characteristics

MaterialPrestressed Concrete
DesignSlab
Total Length109.9 ft (33.5 m)
Max Span49.9 ft (15.2 m)
Deck Width38.1 ft (11.6 m)
Deck Area388.6 sq m
Main Spans1
Year Built2015

Traffic

Avg Daily Traffic742 (2010)
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number120200D00920001

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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