US Bridges

FM 3437 over Navasota River

Fair

Limestone County, Texas · 0.9 MI SW of FM 2681 · Structure no. 091470343201001

Built
1985
40 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
481 ft
6 main spans
Daily traffic
672
2023 count
Owner
State
State Highway Agency

About this bridge

FM 3437 over Navasota River is a prestressed concrete stringer/multi-beam or girder carrying FM 3437 over Navasota River in Limestone County, Texas. It was built in 1985, so it is 40 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 672 vehicles a day, roughly 21% of them trucks, projected to reach 927 by 2042. The structure is 481 ft (146.6 m) long and 36 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesFM 3437
CrossesNavasota River
Location0.9 MI SW of FM 2681
RouteState Highway 3437
CountyLimestone County
StateTexas
Coordinates31.65757, -96.59932
Functional classRural Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
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 geometry6: Equal to present minimum criteria
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 spans6
Design loadHS 20
Structure length481 ft (146.6 m)
Longest span80 ft (24.4 m)
Deck width36 ft (11 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic672 (2023)
Projected traffic927 by 2042
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.7 million
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 3437 over Navasota River built?

It was built in 1985, making it 40 years old in 2025.

What condition is FM 3437 over Navasota River 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 2024.

How much traffic does FM 3437 over Navasota River carry?

About 672 vehicles per day (2023 count), of which roughly 21% are trucks.

How long is FM 3437 over Navasota River?

The structure is 481 ft (146.6 m) long with a longest span of 80 ft (24.4 m) and a deck 36 ft wide.

Who owns FM 3437 over Navasota River?

It is owned by the State Highway Agency.