US Bridges

Middlebrook DR over Horsepen Bayou

FairPosted for load

Harris County, Texas · 1.4M. S of Bay Area Blvd · Structure no. 121020AA2113001

Built
1988
37 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
542 ft
2 main spans
Daily traffic
5,000
2010 count
Owner
County
County Highway Agency

About this bridge

Middlebrook DR over Horsepen Bayou is a steel continuous stringer/multi-beam or girder carrying Middlebrook DR over Horsepen Bayou in Harris County, Texas. It was built in 1988, so it is 37 years old, younger than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 5,000 vehicles a day, projected to reach 5,500 by 2028. The structure is 542 ft (165.2 m) long and 61 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesMiddlebrook DR
CrossesHorsepen Bayou
Location1.4M. S of Bay Area Blvd
RouteCounty Highway 0
CountyHarris County
StateTexas
Coordinates29.58025, -95.09222
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
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 typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+3 approach)
Design loadUnknown
Structure length542 ft (165.2 m)
Longest span150 ft (45.7 m)
Deck width61 ft (18.5 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2010)
Projected traffic5,500 by 2028
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$65,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Middlebrook DR over Horsepen Bayou built?

It was built in 1988, making it 37 years old in 2025.

What condition is Middlebrook DR over Horsepen Bayou in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2023.

How much traffic does Middlebrook DR over Horsepen Bayou carry?

About 5,000 vehicles per day (2010 count).

How long is Middlebrook DR over Horsepen Bayou?

The structure is 542 ft (165.2 m) long with a longest span of 150 ft (45.7 m) and a deck 61 ft wide.

Who owns Middlebrook DR over Horsepen Bayou?

It is owned by the County Highway Agency.