US Bridges

FM 638 over Pin Oak Relief

Good

Navarro County, Texas · 0.7 MI N of Limestone Cl · Structure no. 181750099601010

Built
2012
13 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
70 ft
1 main span
Daily traffic
208
2019 count
Owner
State
State Highway Agency

About this bridge

FM 638 over Pin Oak Relief is a prestressed concrete stringer/multi-beam or girder carrying FM 638 over Pin Oak Relief in Navarro County, Texas. It was built in 2012, so it is 13 years old, younger than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 208 vehicles a day, roughly 22% of them trucks, projected to reach 280 by 2033. The structure is 70 ft (21.3 m) long and 30 ft wide. If it were closed, the detour would be 23 mi (37 km).

CarriesFM 638
CrossesPin Oak Relief
Location0.7 MI N of Limestone Cl
RouteState Highway 638
StateTexas
Coordinates31.8132, -96.57701
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length70 ft (21.3 m)
Longest span70 ft (21.3 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic208 (2019)
Projected traffic280 by 2033
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed23 mi (37 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 638 over Pin Oak Relief built?

It was built in 2012, making it 13 years old in 2025.

What condition is FM 638 over Pin Oak Relief in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2024.

How much traffic does FM 638 over Pin Oak Relief carry?

About 208 vehicles per day (2019 count), of which roughly 22% are trucks.

How long is FM 638 over Pin Oak Relief?

The structure is 70 ft (21.3 m) long with a longest span of 70 ft (21.3 m) and a deck 30 ft wide.

Who owns FM 638 over Pin Oak Relief?

It is owned by the State Highway Agency.