US Bridges

SH 121 SB over Pilot Grove Creek

Good

Collin County, Texas · 1.7 MI SW of SH 160 · Structure no. 180430054903240

Built
2023
2 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
270 ft
3 main spans
Daily traffic
16,000
2017 count
Owner
State
State Highway Agency

About this bridge

SH 121 SB over Pilot Grove Creek is a prestressed concrete stringer/multi-beam or girder carrying SH 121 SB over Pilot Grove Creek in Collin County, Texas. It was built in 2023, so it is 2 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 16,000 vehicles a day, roughly 10% of them trucks, projected to reach 1 by 1900. The structure is 270 ft (82.3 m) long and 40 ft wide.

CarriesSH 121 SB
CrossesPilot Grove Creek
Location1.7 MI SW of SH 160
RouteState Highway 121
StateTexas
Coordinates33.3705, -96.42618
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour evaluation has not been made
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to 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, precast panels
Main spans3
Design loadHL 93
Structure length270 ft (82.3 m)
Longest span90 ft (27.4 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,000 (2017)
Projected traffic1 by 1900
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 SB over Pilot Grove Creek built?

It was built in 2023, making it 2 years old in 2025.

What condition is SH 121 SB over Pilot Grove 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 SB over Pilot Grove Creek carry?

About 16,000 vehicles per day (2017 count), of which roughly 10% are trucks.

How long is SH 121 SB over Pilot Grove Creek?

The structure is 270 ft (82.3 m) long with a longest span of 90 ft (27.4 m) and a deck 40 ft wide.

Who owns SH 121 SB over Pilot Grove Creek?

It is owned by the State Highway Agency.