US Bridges

FM 3148 over Castleman Creek

Fair

McLennan County, Texas · 1.4 MI E of IH 35 · Structure no. 091610323301001

Built
1973
52 years old, rebuilt 2006
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
96 ft
3 main spans
Daily traffic
3,472
2020 count
Owner
State
State Highway Agency

About this bridge

FM 3148 over Castleman Creek is a concrete stringer/multi-beam or girder carrying FM 3148 over Castleman Creek in McLennan County, Texas. It was built in 1973 and reconstructed in 2006, so it is 52 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 3,472 vehicles a day, roughly 7% of them trucks, projected to reach 4,270 by 2033. The structure is 96 ft (29.3 m) long and 46 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesFM 3148
CrossesCastleman Creek
Location1.4 MI E of IH 35
RouteState Highway 3148
CountyMcLennan County
StateTexas
Coordinates31.4294, -97.17396
Functional classUrban Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length96 ft (29.3 m)
Longest span32 ft (9.8 m)
Deck width46 ft (14 m)
Roadway width44 ft (13.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,472 (2020)
Projected traffic4,270 by 2033
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$600,000
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 3148 over Castleman Creek built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 2006.

What condition is FM 3148 over Castleman Creek 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 3148 over Castleman Creek carry?

About 3,472 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is FM 3148 over Castleman Creek?

The structure is 96 ft (29.3 m) long with a longest span of 32 ft (9.8 m) and a deck 46 ft wide.

Who owns FM 3148 over Castleman Creek?

It is owned by the State Highway Agency.