US Bridges

SH 121 NB FR over White Rock Creek

Good

Collin County, Texas · 1.4 MI NE of SH 289 · Structure no. 180430036404171

Built
2007
18 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
330 ft
3 main spans
Daily traffic
22,081
2020 count
Owner
Toll Authority
Local Toll Authority

About this bridge

SH 121 NB FR over White Rock Creek is a prestressed concrete stringer/multi-beam or girder carrying SH 121 NB FR over White Rock Creek in Collin County, Texas. It was built in 2007, so it is 18 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 22,081 vehicles a day, roughly 3% of them trucks, projected to reach 39,052 by 2040. The structure is 330 ft (100.6 m) long and 51 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSH 121 NB FR
CrossesWhite Rock Creek
Location1.4 MI NE of SH 289
RouteState Highway 121
CountyCollin County
StateTexas
Coordinates33.10496, -96.78484
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
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 spans3
Design loadHS 20
Structure length330 ft (100.6 m)
Longest span110 ft (33.5 m)
Deck width51 ft (15.5 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,081 (2020)
Projected traffic39,052 by 2040
Trucks3%
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

OwnerLocal Toll Authority
Maintained byLocal Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$33,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 121 NB FR over White Rock Creek built?

It was built in 2007, making it 18 years old in 2025.

What condition is SH 121 NB FR over White Rock 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 December 2023.

How much traffic does SH 121 NB FR over White Rock Creek carry?

About 22,081 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is SH 121 NB FR over White Rock Creek?

The structure is 330 ft (100.6 m) long with a longest span of 110 ft (33.5 m) and a deck 51 ft wide.

Who owns SH 121 NB FR over White Rock Creek?

It is owned by the Local Toll Authority.