Structure 180430054903243 · Collin County, TX

SH 121 Nbml over FM 2862

Carries SH 121 Nbml over FM 2862, 3.8 Miles SW Of SH 160.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT374 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 7/9 · sets the ratingSubstructure 8/9

374 ft end to end, longest span 97 ft: about 5 semi-trucks nose to tail. 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.

Built20206 years old
Length374.0 ft114 m
Daily traffic16,000counted 2017
Last inspectedAugust 2023every 48 months

Location

StateTexas
CountyCollin
Location3.8 Miles SW Of SH 160
CarriesSH 121 Nbml
CrossesFM 2862
Coordinates33.35122, -96.45372

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length374.0 ft (114 m)
Max Span97.1 ft (29.6 m)
Deck Width40.0 ft (12.2 m)
Deck Area1390.8 sq m
Main Spans4
Year Built2020

Traffic

Avg Daily Traffic16,000 (2017)
Truck Traffic6%
Lanes On Bridge2
Lanes Under Bridge6

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number180430054903243

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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