US Bridges

SH 121 Sbfr over Denton Creek

Good

Dallas County, Texas · 0.25 MI SW of Denton C/L · Structure no. 180570036402453

Built
1998
27 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
675 ft
8 main spans
Daily traffic
3,296
2023 count
Owner
State
State Highway Agency

About this bridge

SH 121 Sbfr over Denton Creek is a prestressed concrete stringer/multi-beam or girder carrying SH 121 Sbfr over Denton Creek in Dallas County, Texas. It was built in 1998, so it is 27 years old, younger 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 3,296 vehicles a day, roughly 5% of them trucks, projected to reach 7,000 by 2036. The structure is 675 ft (205.7 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSH 121 Sbfr
CrossesDenton Creek
Location0.25 MI SW of Denton C/L
RouteState Highway 121
StateTexas
Coordinates32.98717, -97.01394
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length675 ft (205.7 m)
Longest span84 ft (25.7 m)
Deck width40 ft (12.2 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,296 (2023)
Projected traffic7,000 by 2036
Trucks5%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SH 121 Sbfr over Denton Creek built?

It was built in 1998, making it 27 years old in 2025.

What condition is SH 121 Sbfr over Denton Creek 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 February 2024.

How much traffic does SH 121 Sbfr over Denton Creek carry?

About 3,296 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is SH 121 Sbfr over Denton Creek?

The structure is 675 ft (205.7 m) long with a longest span of 84 ft (25.7 m) and a deck 40 ft wide.

Who owns SH 121 Sbfr over Denton Creek?

It is owned by the State Highway Agency.