Structure 22200000812465 · Tarrant County, TX

SH 121 NB (ntta) over Ih-20

Carries SH 121 NB (ntta) over Ih-20, SH 121 NB @ Ih-20.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT860 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 8/9Substructure 6/9 · sets the rating

860 ft end to end, longest span 115 ft: about 2.4 football fields. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built201412 years old
Length859.9 ft262.1 m
Daily traffic42,490counted 2013
Last inspectedJune 2022every 48 months

Location

StateTexas
CountyTarrant
LocationSH 121 NB @ Ih-20
CarriesSH 121 NB (ntta)
CrossesIh-20
Coordinates32.68156, -97.40575

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length859.9 ft (262.1 m)
Max Span115.2 ft (35.1 m)
Deck Width64.0 ft (19.5 m)
Deck Area5110.9 sq m
Main Spans8
Year Built2014

Traffic

Avg Daily Traffic42,490 (2013)
Truck Traffic1%
Lanes On Bridge4
Lanes Under Bridge12

Inspection & Ownership

Last InspectionJune 2022
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number022200000812465

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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