US Bridges

Dallas N Tollway over Trinity Mills RD

Fair

Collin County, Texas · 0.50 MI S of Frankford RD · Structure no. 1804309D0470001

Built
1987
38 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
248 ft
3 main spans
Daily traffic
25,900
2011 count
Owner
Toll Authority
Local Toll Authority

About this bridge

Dallas N Tollway over Trinity Mills RD is a prestressed concrete stringer/multi-beam or girder carrying Dallas N Tollway over Trinity Mills RD in Collin County, Texas. It was built in 1987, so it is 38 years old, younger than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 25,900 vehicles a day, roughly 1% of them trucks, projected to reach 31,800 by 2031. The structure is 248 ft (75.6 m) long and 101 ft wide.

Location

Open in Google Maps
CarriesDallas N Tollway
CrossesTrinity Mills RD
Location0.50 MI S of Frankford RD
CountyCollin County
StateTexas
Coordinates32.99028, -96.82915
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
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 length248 ft (75.6 m)
Longest span85 ft (25.9 m)
Deck width101 ft (30.8 m)
Roadway width96 ft (29.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,900 (2011)
Projected traffic31,800 by 2031
Trucks1%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerLocal Toll Authority
Maintained byLocal Toll Authority
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 Dallas N Tollway over Trinity Mills RD built?

It was built in 1987, making it 38 years old in 2025.

What condition is Dallas N Tollway over Trinity Mills RD in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2023.

How much traffic does Dallas N Tollway over Trinity Mills RD carry?

About 25,900 vehicles per day (2011 count), of which roughly 1% are trucks.

How long is Dallas N Tollway over Trinity Mills RD?

The structure is 248 ft (75.6 m) long with a longest span of 85 ft (25.9 m) and a deck 101 ft wide.

Who owns Dallas N Tollway over Trinity Mills RD?

It is owned by the Local Toll Authority.