US Bridges

Bagby ST over Buffalo Bayou

Fair

Harris County, Texas · At Memorial Drive · Structure no. 121020B05073002

Built
1959
66 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
158 ft
2 main spans
Daily traffic
1,096
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Bagby ST over Buffalo Bayou is a steel stringer/multi-beam or girder carrying Bagby ST over Buffalo Bayou in Harris County, Texas. It was built in 1959, so it is 66 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 1,096 vehicles a day, roughly 5% of them trucks, projected to reach 1,644 by 2042. The structure is 158 ft (48.2 m) long and 90 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesBagby ST
CrossesBuffalo Bayou
LocationAt Memorial Drive
RouteCity Street 0
CountyHarris County
StateTexas
Coordinates29.76305, -95.36748
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.9 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length158 ft (48.2 m)
Longest span82 ft (25 m)
Deck width90 ft (27.3 m)
Roadway width45 ft (13.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,096 (2021)
Projected traffic1,644 by 2042
Trucks5%
Lanes on structure4
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$26,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Bagby ST over Buffalo Bayou built?

It was built in 1959, making it 66 years old in 2025.

What condition is Bagby ST over Buffalo 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 December 2023.

How much traffic does Bagby ST over Buffalo Bayou carry?

About 1,096 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Bagby ST over Buffalo Bayou?

The structure is 158 ft (48.2 m) long with a longest span of 82 ft (25 m) and a deck 90 ft wide.

Who owns Bagby ST over Buffalo Bayou?

It is owned by the City or Municipal Highway Agency.