US Bridges

DC SH121WB IH35NB over IH 35E NB Fr/Timber Crk

Good

Denton County, Texas · IH35 / SH121 Interchange · Structure no. 180610019602512

Built
2019
6 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
2,669 ft
23 main spans
Daily traffic
4,300
2010 count
Owner
State
State Highway Agency

About this bridge

DC SH121WB IH35NB over IH 35E NB Fr/Timber Crk is a prestressed concrete stringer/multi-beam or girder carrying DC SH121WB IH35NB over IH 35E NB Fr/Timber Crk in Denton 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 4,300 vehicles a day, roughly 35% of them trucks, projected to reach 6,500 by 2030. The structure is 2,669 ft (813.5 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesDC SH121WB IH35NB
CrossesIH 35E NB Fr/Timber Crk
LocationIH35 / SH121 Interchange
CountyDenton County
StateTexas
Coordinates33.00134, -96.95897
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum 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

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans23
Design loadHL 93
Structure length2,669 ft (813.5 m)
Longest span125 ft (38.1 m)
Deck width28 ft (8.5 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,300 (2010)
Projected traffic6,500 by 2030
Trucks35%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway and waterway
Detour if closed1.9 mi (3 km)
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byPrivate (other than railroad)
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 DC SH121WB IH35NB over IH 35E NB Fr/Timber Crk built?

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

What condition is DC SH121WB IH35NB over IH 35E NB Fr/Timber Crk 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 February 2023.

How much traffic does DC SH121WB IH35NB over IH 35E NB Fr/Timber Crk carry?

About 4,300 vehicles per day (2010 count), of which roughly 35% are trucks.

How long is DC SH121WB IH35NB over IH 35E NB Fr/Timber Crk?

The structure is 2,669 ft (813.5 m) long with a longest span of 125 ft (38.1 m) and a deck 28 ft wide.

Who owns DC SH121WB IH35NB over IH 35E NB Fr/Timber Crk?

It is owned by the State Highway Agency and maintained by the Private (other than railroad).