US Bridges

Carlsbad ST over Sims Bayou

Good

Harris County, Texas · 0.60 MI S of US 90A · Structure no. 121020B12489932

Built
1989
36 years old
Condition
Good
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
152 ft
3 main spans
Daily traffic
463
2013 count
Owner
City
City or Municipal Highway Agency

About this bridge

Carlsbad ST over Sims Bayou is a prestressed concrete box beam or girders - multiple carrying Carlsbad ST over Sims Bayou in Harris County, Texas. It was built in 1989, so it is 36 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 463 vehicles a day, projected to reach 563 by 2033. The structure is 152 ft (46.3 m) long and 54 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCarlsbad ST
CrossesSims Bayou
Location0.60 MI S of US 90A
RouteCity Street 0
CountyHarris County
StateTexas
Coordinates29.62575, -95.49909
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length152 ft (46.3 m)
Longest span50 ft (15.2 m)
Deck width54 ft (16.5 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic463 (2013)
Projected traffic563 by 2033
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Carlsbad ST over Sims Bayou built?

It was built in 1989, making it 36 years old in 2025.

What condition is Carlsbad ST over Sims 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 August 2023.

How much traffic does Carlsbad ST over Sims Bayou carry?

About 463 vehicles per day (2013 count).

How long is Carlsbad ST over Sims Bayou?

The structure is 152 ft (46.3 m) long with a longest span of 50 ft (15.2 m) and a deck 54 ft wide.

Who owns Carlsbad ST over Sims Bayou?

It is owned by the City or Municipal Highway Agency.