US Bridges

IH 69 / US 59 Nbfr over Keegans Bayou

Fair

Harris County, Texas · 0.5 MI SW of Beltway 8 · Structure no. 121020002713199

Built
1988
37 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
267 ft
4 main spans
Daily traffic
19,848
2022 count
Owner
State
State Highway Agency

About this bridge

IH 69 / US 59 Nbfr over Keegans Bayou is a prestressed concrete stringer/multi-beam or girder carrying IH 69 / US 59 Nbfr over Keegans 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 5 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 19,848 vehicles a day, roughly 3% of them trucks, projected to reach 43,690 by 2030. The structure is 267 ft (81.4 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesIH 69 / US 59 Nbfr
CrossesKeegans Bayou
Location0.5 MI SW of Beltway 8
RouteInterstate 69
CountyHarris County
StateTexas
Coordinates29.65588, -95.56291
Functional classUrban Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length267 ft (81.4 m)
Longest span67 ft (20.4 m)
Deck width42 ft (12.7 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,848 (2022)
Projected traffic43,690 by 2030
Trucks3%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$26,000
NavigationNo navigation control on waterway

Frequently asked questions

When was IH 69 / US 59 Nbfr over Keegans Bayou built?

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

What condition is IH 69 / US 59 Nbfr 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 August 2024.

How much traffic does IH 69 / US 59 Nbfr over Keegans Bayou carry?

About 19,848 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is IH 69 / US 59 Nbfr over Keegans Bayou?

The structure is 267 ft (81.4 m) long with a longest span of 67 ft (20.4 m) and a deck 42 ft wide.

Who owns IH 69 / US 59 Nbfr over Keegans Bayou?

It is owned by the State Highway Agency.