US Bridges

FM 270 over Robinson Bayou

Fair

Galveston County, Texas · 0.15 MI W of FM 518 · Structure no. 120850331202003

Built
1981
44 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
125 ft
3 main spans
Daily traffic
30,155
2020 count
Owner
State
State Highway Agency

About this bridge

FM 270 over Robinson Bayou is a concrete stringer/multi-beam or girder carrying FM 270 over Robinson Bayou in Galveston County, Texas. It was built in 1981, so it is 44 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.

It carries about 30,155 vehicles a day, roughly 4% of them trucks, projected to reach 40,230 by 2033. The structure is 125 ft (38.1 m) long and 90 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesFM 270
CrossesRobinson Bayou
Location0.15 MI W of FM 518
RouteState Highway 270
CountyGalveston County
StateTexas
Coordinates29.52256, -95.07884
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum 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 spans3
Design loadHS 20
Structure length125 ft (38.1 m)
Longest span42 ft (12.8 m)
Deck width90 ft (27.5 m)
Roadway width85 ft (26 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,155 (2020)
Projected traffic40,230 by 2033
Trucks4%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 270 over Robinson Bayou built?

It was built in 1981, making it 44 years old in 2025.

What condition is FM 270 over Robinson 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 2024.

How much traffic does FM 270 over Robinson Bayou carry?

About 30,155 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is FM 270 over Robinson Bayou?

The structure is 125 ft (38.1 m) long with a longest span of 42 ft (12.8 m) and a deck 90 ft wide.

Who owns FM 270 over Robinson Bayou?

It is owned by the State Highway Agency.