US Bridges

FM 603 over IH 20

Fair

Callahan County, Texas · 4.10 MI E of Taylor C/L · Structure no. 080300000607279

Built
1964
61 years old
Condition
Fair
inspected February 2023
Type
Tee Beam
Concrete Continuous
Length
252 ft
4 main spans
Daily traffic
1,472
2023 count
Owner
State
State Highway Agency

About this bridge

FM 603 over IH 20 is a concrete continuous tee beam carrying FM 603 over IH 20 in Callahan County, Texas. It was built in 1964, so it is 61 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 1,472 vehicles a day, roughly 18% of them trucks, projected to reach 1,470 by 2033. The structure is 252 ft (76.8 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesFM 603
CrossesIH 20
Location4.10 MI E of Taylor C/L
RouteState Highway 603
CountyCallahan County
StateTexas
Coordinates32.42461, -99.56167
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45 US tons
Inventory rating27 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length252 ft (76.8 m)
Longest span70 ft (21.3 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,472 (2023)
Projected traffic1,470 by 2033
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$151,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was FM 603 over IH 20 built?

It was built in 1964, making it 61 years old in 2025.

What condition is FM 603 over IH 20 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 February 2023.

How much traffic does FM 603 over IH 20 carry?

About 1,472 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is FM 603 over IH 20?

The structure is 252 ft (76.8 m) long with a longest span of 70 ft (21.3 m) and a deck 27 ft wide.

Who owns FM 603 over IH 20?

It is owned by the State Highway Agency.