US Bridges

FM 1791 over San Jacinto River Relief

Fair

Walker County, Texas · 3.55 MI NE of FM 3179 · Structure no. 172360170601011

Built
1980
45 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
303 ft
10 main spans
Daily traffic
1,213
2020 count
Owner
State
State Highway Agency

About this bridge

FM 1791 over San Jacinto River Relief is a concrete stringer/multi-beam or girder carrying FM 1791 over San Jacinto River Relief in Walker County, Texas. It was built in 1980, so it is 45 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 1,213 vehicles a day, roughly 9% of them trucks, projected to reach 2,444 by 2039. The structure is 303 ft (92.4 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesFM 1791
CrossesSan Jacinto River Relief
Location3.55 MI NE of FM 3179
RouteState Highway 1791
StateTexas
Coordinates30.64998, -95.67281
Functional classRural Major 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length303 ft (92.4 m)
Longest span30 ft (9.1 m)
Deck width36 ft (11.1 m)
Roadway width34 ft (10.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,213 (2020)
Projected traffic2,444 by 2039
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
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 1791 over San Jacinto River Relief built?

It was built in 1980, making it 45 years old in 2025.

What condition is FM 1791 over San Jacinto River Relief 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 July 2023.

How much traffic does FM 1791 over San Jacinto River Relief carry?

About 1,213 vehicles per day (2020 count), of which roughly 9% are trucks.

How long is FM 1791 over San Jacinto River Relief?

The structure is 303 ft (92.4 m) long with a longest span of 30 ft (9.1 m) and a deck 36 ft wide.

Who owns FM 1791 over San Jacinto River Relief?

It is owned by the State Highway Agency.