US Bridges

Throckmorton Road over US 75

Good

Collin County, Texas · 3.1 MI N of SH 121 · Structure no. 180430004714670

Built
2019
6 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
320 ft
2 main spans
Daily traffic
101
2017 count
Owner
State
State Highway Agency

About this bridge

Throckmorton Road over US 75 is a prestressed concrete stringer/multi-beam or girder carrying Throckmorton Road over US 75 in Collin County, Texas. It was built in 2019, so it is 6 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 101 vehicles a day, roughly 3% of them trucks, projected to reach 141 by 2037. The structure is 320 ft (97.5 m) long and 110 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesThrockmorton Road
CrossesUS 75
Location3.1 MI N of SH 121
RouteU.S. Route 0
CountyCollin County
StateTexas
Coordinates33.30934, -96.59157
Functional classUrban Collector

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.
Last inspectionApril 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: 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, precast panels
Main spans2 (+2 approach)
Design loadHL 93
Structure length320 ft (97.5 m)
Longest span115 ft (35.1 m)
Deck width110 ft (33.5 m)
Roadway width93 ft (28.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic101 (2017)
Projected traffic141 by 2037
Trucks3%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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 Throckmorton Road over US 75 built?

It was built in 2019, making it 6 years old in 2025.

What condition is Throckmorton Road over US 75 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 2023.

How much traffic does Throckmorton Road over US 75 carry?

About 101 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is Throckmorton Road over US 75?

The structure is 320 ft (97.5 m) long with a longest span of 115 ft (35.1 m) and a deck 110 ft wide.

Who owns Throckmorton Road over US 75?

It is owned by the State Highway Agency.