Structure 121020027107307 · Harris County, TX

N Durham DR over IH 10

Carries N Durham DR over IH 10, 2.6 Mi E Of IH 610.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT265 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

265 ft end to end, longest span 82 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 slab bridge.

Built196759 years old
Length265.1 ft80.8 m
Daily traffic16,660counted 2015
Last inspectedDecember 2024every 24 months

Location

StateTexas
CountyHarris
Location2.6 Mi E Of IH 610
CarriesN Durham DR
CrossesIH 10
Coordinates29.77748, -95.41057

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length265.1 ft (80.8 m)
Max Span82.0 ft (25 m)
Deck Width58.4 ft (17.8 m)
Deck Area1438.2 sq m
Main Spans4
Year Built1967

Traffic

Avg Daily Traffic16,660 (2015)
Lanes On Bridge4
Lanes Under Bridge12

Inspection & Ownership

Last InspectionDecember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour CriticalNot applicable
Structure Number121020027107307

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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