Structure 181990000912481 · Rockwall County, TX

IH 30 EB over FM 551

Carries IH 30 EB over FM 551, 2.39 Mi E Of FM 549.

Overall conditionGood

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

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

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT309 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

309 ft end to end, longest span 103 ft: about 4 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.

Built201610 years old
Length309.1 ft94.2 m
Daily traffic33,000counted 2019
Last inspectedSeptember 2023every 48 months

Location

StateTexas
CountyRockwall
Location2.39 Mi E Of FM 549
CarriesIH 30 EB
CrossesFM 551
Coordinates32.93334, -96.38091

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length309.1 ft (94.2 m)
Max Span103.0 ft (31.4 m)
Deck Width70.9 ft (21.6 m)
Deck Area2034.7 sq m
Main Spans3
Year Built2016

Traffic

Avg Daily Traffic33,000 (2019)
Truck Traffic23%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number181990000912481

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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