US Bridges

Patterson RD over Mustang Bayou

PoorPosted for load

Brazoria County, Texas · 0.25 MI SW of Choc Byu RD · Structure no. 120200W00180001

Built
1981
44 years old
Condition
Poor
inspected November 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
53 ft
4 main spans
Daily traffic
160
2011 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Patterson RD over Mustang Bayou is a wood or timber stringer/multi-beam or girder carrying Patterson RD over Mustang Bayou in Brazoria County, Texas. It was built in 1981, so it is 44 years old, younger than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 160 vehicles a day, projected to reach 200 by 2031. The structure is 53 ft (16.2 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesPatterson RD
CrossesMustang Bayou
Location0.25 MI SW of Choc Byu RD
RouteCity Street 0
CountyBrazoria County
StateTexas
Coordinates29.50374, -95.35248
Functional classUrban Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29 US tons
Inventory rating20.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadUnknown
Structure length53 ft (16.2 m)
Longest span13 ft (4 m)
Deck width25 ft (7.5 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic160 (2011)
Projected traffic200 by 2031
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Patterson RD over Mustang Bayou built?

It was built in 1981, making it 44 years old in 2025.

What condition is Patterson RD over Mustang Bayou in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2023.

How much traffic does Patterson RD over Mustang Bayou carry?

About 160 vehicles per day (2011 count).

How long is Patterson RD over Mustang Bayou?

The structure is 53 ft (16.2 m) long with a longest span of 13 ft (4 m) and a deck 25 ft wide.

Who owns Patterson RD over Mustang Bayou?

It is owned by the Town or Township Highway Agency.