US Bridges

SH 121 NB (ntta) over IH-20

Fair

Tarrant County, Texas · SH 121 NB @ IH-20 · Structure no. 022200000812465

Built
2014
11 years old
Condition
Fair
inspected June 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
860 ft
8 main spans
Daily traffic
42,490
2013 count
Owner
State
State Highway Agency

About this bridge

SH 121 NB (ntta) over IH-20 is a prestressed concrete stringer/multi-beam or girder carrying SH 121 NB (ntta) over IH-20 in Tarrant County, Texas. It was built in 2014, so it is 11 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 42,490 vehicles a day, roughly 1% of them trucks, projected to reach 42,590 by 2033. The structure is 860 ft (262.1 m) long and 64 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSH 121 NB (ntta)
CrossesIH-20
LocationSH 121 NB @ IH-20
CountyTarrant County
StateTexas
Coordinates32.68156, -97.40575
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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2022
Inspection intervalevery 48 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 rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans8
Design loadHL 93
Structure length860 ft (262.1 m)
Longest span115 ft (35.1 m)
Deck width64 ft (19.5 m)
Roadway width61 ft (18.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,490 (2013)
Projected traffic42,590 by 2033
Trucks1%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 SH 121 NB (ntta) over IH-20 built?

It was built in 2014, making it 11 years old in 2025.

What condition is SH 121 NB (ntta) over IH-20 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 June 2022.

How much traffic does SH 121 NB (ntta) over IH-20 carry?

About 42,490 vehicles per day (2013 count), of which roughly 1% are trucks.

How long is SH 121 NB (ntta) over IH-20?

The structure is 860 ft (262.1 m) long with a longest span of 115 ft (35.1 m) and a deck 64 ft wide.

Who owns SH 121 NB (ntta) over IH-20?

It is owned by the State Highway Agency and maintained by the State Toll Authority.