Structure 180570000903321 · Dallas County, TX

SH 66 over Rowlett Creek

Carries SH 66 over Rowlett Creek, 2.10 Mi E Of SH 78.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,200 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

1,200 ft end to end, longest span 40 ft: about 3.3 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.

Built1977rebuilt 1998
Length1200.1 ft365.8 m
Daily traffic37,263counted 2019
Last inspectedJanuary 2024every 24 months

Location

StateTexas
CountyDallas
Location2.10 Mi E Of SH 78
CarriesSH 66
CrossesRowlett Creek
Coordinates32.90946, -96.59226

Physical Characteristics

MaterialConcrete
DesignStringer/Multi-beam
Total Length1200.1 ft (365.8 m)
Max Span40.0 ft (12.2 m)
Deck Width113.8 ft (34.7 m)
Deck Area12693.3 sq m
Main Spans30
Year Built1977 (reconstructed 1998)

Traffic

Avg Daily Traffic37,263 (2019)
Truck Traffic11%
Lanes On Bridge6

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number180570000903321

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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