US Bridges

FM 603 over Pecan Bayou

Good

Callahan County, Texas · 5.1 MI S of IH 20 · Structure no. 080300097301003

Built
2004
21 years old
Condition
Good
inspected February 2024
Type
Culvert
Concrete
Length
99 ft
10 main spans
Daily traffic
2,268
2020 count
Owner
State
State Highway Agency

About this bridge

FM 603 over Pecan Bayou is a concrete culvert carrying FM 603 over Pecan Bayou in Callahan County, Texas. It was built in 2004, so it is 21 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 2,268 vehicles a day, roughly 6% of them trucks, projected to reach 4,050 by 2040. The structure is 99 ft (30.2 m) long and 48 ft wide. If it were closed, the detour would be 18 mi (29 km).

CarriesFM 603
CrossesPecan Bayou
Location5.1 MI S of IH 20
RouteState Highway 603
StateTexas
Coordinates32.35061, -99.56221
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length99 ft (30.2 m)
Longest span8 ft (2.4 m)
Deck width48 ft (14.7 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,268 (2020)
Projected traffic4,050 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 603 over Pecan Bayou built?

It was built in 2004, making it 21 years old in 2025.

What condition is FM 603 over Pecan Bayou 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 February 2024.

How much traffic does FM 603 over Pecan Bayou carry?

About 2,268 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is FM 603 over Pecan Bayou?

The structure is 99 ft (30.2 m) long with a longest span of 8 ft (2.4 m) and a deck 48 ft wide.

Who owns FM 603 over Pecan Bayou?

It is owned by the State Highway Agency.