US Bridges

FM 503 over Elm Crk

Good

McCulloch County, Texas · 0.75 MI S of FM 765 · Structure no. 231600086902029

Built
1964
61 years old
Condition
Good
inspected May 2024
Type
Culvert
Concrete
Length
54 ft
5 main spans
Daily traffic
75
2022 count
Owner
State
State Highway Agency

About this bridge

FM 503 over Elm Crk is a concrete culvert carrying FM 503 over Elm Crk in McCulloch 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 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 75 vehicles a day, roughly 20% of them trucks, projected to reach 115 by 2038. The structure is 54 ft (16.5 m) long and 33 ft wide. If it were closed, the detour would be 18 mi (29 km).

CarriesFM 503
CrossesElm Crk
Location0.75 MI S of FM 765
RouteState Highway 503
StateTexas
Coordinates31.38169, -99.59945
Functional classRural Minor 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 inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length54 ft (16.5 m)
Longest span10 ft (3 m)
Deck width33 ft (10.2 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2022)
Projected traffic115 by 2038
Trucks20%
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 503 over Elm Crk built?

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

What condition is FM 503 over Elm Crk 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 May 2024.

How much traffic does FM 503 over Elm Crk carry?

About 75 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is FM 503 over Elm Crk?

The structure is 54 ft (16.5 m) long with a longest span of 10 ft (3 m) and a deck 33 ft wide.

Who owns FM 503 over Elm Crk?

It is owned by the State Highway Agency.