Structure 120200W00180001 · Brazoria County, TX

Patterson RD over Mustang Bayou

Carries Patterson RD over Mustang Bayou, 0.25 Mi SW Of Choc Byu RD.

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 overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT53 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 4/9 · sets the rating

53 ft end to end, longest span 13 ft. 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 multi-beam bridge.

Built198145 years old
Length53.1 ft16.2 m
Daily traffic160counted 2011
Last inspectedNovember 2023every 24 months

Location

StateTexas
CountyBrazoria
Location0.25 Mi SW Of Choc Byu RD
CarriesPatterson RD
CrossesMustang Bayou
Coordinates29.50374, -95.35248

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length53.1 ft (16.2 m)
Max Span13.1 ft (4 m)
Deck Width24.6 ft (7.5 m)
Deck Area121.5 sq m
Main Spans4
Year Built1981

Traffic

Avg Daily Traffic160 (2011)
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number120200W00180001

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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