Structure 180610019602372 · Denton County, TX

SH 121 Toll Sbml over Ih35e L Vista DR Timb CR

Carries SH 121 Toll Sbml over Ih35e L Vista DR Timb CR, Ih35e/sh121 Interchange.

Overall conditionGood

Set by its lowest-rated component: Deck and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT3,778 FT OVERALL500 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 7/9 · sets the rating

3,778 ft end to end, longest span 132 ft: about 10 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.

Built200620 years old
Length3777.9 ft1151.5 m
Daily traffic62,000counted 2013
Last inspectedOctober 2023every 24 months

Location

StateTexas
CountyDenton
LocationIh35e/sh121 Interchange
CarriesSH 121 Toll Sbml
CrossesIh35e L Vista DR Timb CR
Coordinates32.99534, -96.96502

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length3777.9 ft (1151.5 m)
Max Span131.9 ft (40.2 m)
Deck Width61.4 ft (18.7 m)
Deck Area21533.0 sq m
Main Spans31
Year Built2006

Traffic

Avg Daily Traffic62,000 (2013)
Truck Traffic6%
Lanes On Bridge3
Lanes Under Bridge21

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerLocal Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number180610019602372

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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