US Bridges

SH 121 Nbfr over BNSF Railroad

Fair

Denton County, Texas · 2.20 MI NE of FM 423 · Structure no. 180610036403125

Built
2006
19 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
268 ft
2 main spans
Daily traffic
18,530
2011 count
Owner
Toll Authority
Local Toll Authority

About this bridge

SH 121 Nbfr over BNSF Railroad is a prestressed concrete stringer/multi-beam or girder carrying SH 121 Nbfr over BNSF Railroad in Denton County, Texas. It was built in 2006, so it is 19 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 18,530 vehicles a day, roughly 3% of them trucks, projected to reach 25,940 by 2031. The structure is 268 ft (81.7 m) long and 42 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSH 121 Nbfr
CrossesBNSF Railroad
Location2.20 MI NE of FM 423
RouteState Highway 121
CountyDenton County
StateTexas
Coordinates33.08063, -96.85558
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 48 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 rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2 (+1 approach)
Design loadHS 20
Structure length268 ft (81.7 m)
Longest span114 ft (34.7 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,530 (2011)
Projected traffic25,940 by 2031
Trucks3%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerLocal Toll Authority
Maintained byLocal Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SH 121 Nbfr over BNSF Railroad built?

It was built in 2006, making it 19 years old in 2025.

What condition is SH 121 Nbfr over BNSF Railroad 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 October 2023.

How much traffic does SH 121 Nbfr over BNSF Railroad carry?

About 18,530 vehicles per day (2011 count), of which roughly 3% are trucks.

How long is SH 121 Nbfr over BNSF Railroad?

The structure is 268 ft (81.7 m) long with a longest span of 114 ft (34.7 m) and a deck 42 ft wide.

Who owns SH 121 Nbfr over BNSF Railroad?

It is owned by the Local Toll Authority.