US Bridges

CR 668 over Mustang Bayou

PoorPosted for load

Brazoria County, Texas · 0.20 MI SW of CR 145 · Structure no. 120200AA0712001

Built
1984
41 years old
Condition
Poor
inspected October 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
79 ft
6 main spans
Daily traffic
45
2017 count
Owner
County
County Highway Agency

About this bridge

CR 668 over Mustang Bayou is a wood or timber stringer/multi-beam or girder carrying CR 668 over Mustang Bayou in Brazoria County, Texas. It was built in 1984, so it is 41 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 45 vehicles a day, projected to reach 55 by 2037. The structure is 79 ft (24.1 m) long and 24 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCR 668
CrossesMustang Bayou
Location0.20 MI SW of CR 145
RouteCounty Highway 668
CountyBrazoria County
StateTexas
Coordinates29.44531, -95.27482
Functional classRural 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.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating18 US tons
Inventory rating12 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans6
Design loadUnknown
Structure length79 ft (24.1 m)
Longest span14 ft (4.3 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45 (2017)
Projected traffic55 by 2037
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$66,000
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 668 over Mustang Bayou built?

It was built in 1984, making it 41 years old in 2025.

What condition is CR 668 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 October 2023.

How much traffic does CR 668 over Mustang Bayou carry?

About 45 vehicles per day (2017 count).

How long is CR 668 over Mustang Bayou?

The structure is 79 ft (24.1 m) long with a longest span of 14 ft (4.3 m) and a deck 24 ft wide.

Who owns CR 668 over Mustang Bayou?

It is owned by the County Highway Agency.