US Bridges

SH 121 Sbml over Desert Creek

Good

Collin County, Texas · 0.3 MI NE of SH 160 · Structure no. 180430054903239

Built
2022
3 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
200 ft
1 main span
Daily traffic
10,572
2020 count
Owner
State
State Highway Agency

About this bridge

SH 121 Sbml over Desert Creek is a prestressed concrete stringer/multi-beam or girder carrying SH 121 Sbml over Desert Creek in Collin County, Texas. It was built in 2022, so it is 3 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 10,572 vehicles a day, roughly 12% of them trucks, projected to reach 21,144 by 2040. The structure is 200 ft (61 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSH 121 Sbml
CrossesDesert Creek
Location0.3 MI NE of SH 160
RouteState Highway 121
StateTexas
Coordinates33.38572, -96.39734
Functional classRural Principal Arterial - Other

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
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 spans1 (+2 approach)
Design loadHL 93
Structure length200 ft (61 m)
Longest span90 ft (27.4 m)
Deck width56 ft (17.2 m)
Roadway width53 ft (16.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,572 (2020)
Projected traffic21,144 by 2040
Trucks12%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 121 Sbml over Desert Creek built?

It was built in 2022, making it 3 years old in 2025.

What condition is SH 121 Sbml over Desert 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 April 2024.

How much traffic does SH 121 Sbml over Desert Creek carry?

About 10,572 vehicles per day (2020 count), of which roughly 12% are trucks.

How long is SH 121 Sbml over Desert Creek?

The structure is 200 ft (61 m) long with a longest span of 90 ft (27.4 m) and a deck 56 ft wide.

Who owns SH 121 Sbml over Desert Creek?

It is owned by the State Highway Agency.