US Bridges

FM 2478 NB over Rowlett Creek Tributary

Fair

Collin County, Texas · 2.9 MI N of SH 121 · Structure no. 180430235101009

Built
1990
35 years old, rebuilt 2017
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
94 ft
3 main spans
Daily traffic
20,264
2022 count
Owner
State
State Highway Agency

About this bridge

FM 2478 NB over Rowlett Creek Tributary is a concrete stringer/multi-beam or girder carrying FM 2478 NB over Rowlett Creek Tributary in Collin County, Texas. It was built in 1990 and reconstructed in 2017, so it is 35 years old, younger 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 20,264 vehicles a day, roughly 4% of them trucks, projected to reach 30,853 by 2038. The structure is 94 ft (28.5 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFM 2478 NB
CrossesRowlett Creek Tributary
Location2.9 MI N of SH 121
RouteState Highway 2478
CountyCollin County
StateTexas
Coordinates33.1653, -96.73288
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
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 typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length94 ft (28.5 m)
Longest span31 ft (9.5 m)
Deck width50 ft (15.2 m)
Roadway width38 ft (11.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,264 (2022)
Projected traffic30,853 by 2038
Trucks4%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$6,000
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 2478 NB over Rowlett Creek Tributary built?

It was built in 1990, making it 35 years old in 2025. It was reconstructed in 2017.

What condition is FM 2478 NB over Rowlett Creek Tributary 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 November 2023.

How much traffic does FM 2478 NB over Rowlett Creek Tributary carry?

About 20,264 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is FM 2478 NB over Rowlett Creek Tributary?

The structure is 94 ft (28.5 m) long with a longest span of 31 ft (9.5 m) and a deck 50 ft wide.

Who owns FM 2478 NB over Rowlett Creek Tributary?

It is owned by the State Highway Agency.