US Bridges

Belknap RD over Keegans Bayou

Fair

Fort Bend County, Texas · 0.05 MI S of Harris C/L · Structure no. 120800AA0139001

Built
1975
50 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
101 ft
1 main span
Daily traffic
1,270
2013 count
Owner
County
County Highway Agency

About this bridge

Belknap RD over Keegans Bayou is a concrete stringer/multi-beam or girder carrying Belknap RD over Keegans Bayou in Fort Bend County, Texas. It was built in 1975, so it is 50 years old, older 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.

It carries about 1,270 vehicles a day, projected to reach 5,510 by 2033. The structure is 101 ft (30.8 m) long and 35 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesBelknap RD
CrossesKeegans Bayou
Location0.05 MI S of Harris C/L
RouteCounty Highway 168
CountyFort Bend County
StateTexas
Coordinates29.67342, -95.62326
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length101 ft (30.8 m)
Longest span40 ft (12.2 m)
Deck width35 ft (10.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,270 (2013)
Projected traffic5,510 by 2033
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Belknap RD over Keegans Bayou built?

It was built in 1975, making it 50 years old in 2025.

What condition is Belknap RD over Keegans 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 September 2023.

How much traffic does Belknap RD over Keegans Bayou carry?

About 1,270 vehicles per day (2013 count).

How long is Belknap RD over Keegans Bayou?

The structure is 101 ft (30.8 m) long with a longest span of 40 ft (12.2 m) and a deck 35 ft wide.

Who owns Belknap RD over Keegans Bayou?

It is owned by the County Highway Agency.