US Bridges

CR 171 over Brushy Bayou

Good

Brazoria County, Texas · 1.90 MI NE of SH 35 · Structure no. 120200AA0812001

Built
1981
44 years old
Condition
Good
inspected December 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
120 ft
3 main spans
Daily traffic
1,870
2019 count
Owner
County
County Highway Agency

About this bridge

CR 171 over Brushy Bayou is a prestressed concrete box beam or girders - multiple carrying CR 171 over Brushy 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,870 vehicles a day, projected to reach 3,500 by 2032. The structure is 120 ft (36.6 m) long and 43 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCR 171
CrossesBrushy Bayou
Location1.90 MI NE of SH 35
RouteCounty Highway 171
CountyBrazoria County
StateTexas
Coordinates29.1835, -95.3931
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span40 ft (12.2 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,870 (2019)
Projected traffic3,500 by 2032
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

OwnerCounty Highway Agency
Maintained byCounty 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 CR 171 over Brushy Bayou built?

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

What condition is CR 171 over Brushy Bayou in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2023.

How much traffic does CR 171 over Brushy Bayou carry?

About 1,870 vehicles per day (2019 count).

How long is CR 171 over Brushy Bayou?

The structure is 120 ft (36.6 m) long with a longest span of 40 ft (12.2 m) and a deck 43 ft wide.

Who owns CR 171 over Brushy Bayou?

It is owned by the County Highway Agency.