US Bridges

SH121 SB to I35NB over WTHFRD/SP347 to US377 EB

Fair

Tarrant County, Texas · 500 Ft E of 287/377 Inter · Structure no. 022200008101146

Built
1963
62 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
216 ft
3 main spans
Daily traffic
100,072
2022 count
Owner
State
State Highway Agency

About this bridge

SH121 SB to I35NB over WTHFRD/SP347 to US377 EB is a steel continuous stringer/multi-beam or girder carrying SH121 SB to I35NB over WTHFRD/SP347 to US377 EB in Tarrant County, Texas. It was built in 1963, so it is 62 years old, older 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 100,072 vehicles a day, roughly 7% of them trucks, projected to reach 172,622 by 2040. The structure is 216 ft (65.8 m) long and 71 ft wide.

Location

Open in Google Maps
CarriesSH121 SB to I35NB
CrossesWTHFRD/SP347 to US377 EB
Location500 Ft E of 287/377 Inter
RouteState Highway 121
CountyTarrant County
StateTexas
Coordinates32.76608, -97.31562
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating34.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length216 ft (65.8 m)
Longest span92 ft (28 m)
Deck width71 ft (21.7 m)
Roadway width69 ft (21 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100,072 (2022)
Projected traffic172,622 by 2040
Trucks7%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SH121 SB to I35NB over WTHFRD/SP347 to US377 EB built?

It was built in 1963, making it 62 years old in 2025.

What condition is SH121 SB to I35NB over WTHFRD/SP347 to US377 EB 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 April 2024.

How much traffic does SH121 SB to I35NB over WTHFRD/SP347 to US377 EB carry?

About 100,072 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is SH121 SB to I35NB over WTHFRD/SP347 to US377 EB?

The structure is 216 ft (65.8 m) long with a longest span of 92 ft (28 m) and a deck 71 ft wide.

Who owns SH121 SB to I35NB over WTHFRD/SP347 to US377 EB?

It is owned by the State Highway Agency.