Structure 121020B07177677 · Harris County, TX

Benning DR over Chimney Rock Ditch

Carries Benning DR over Chimney Rock Ditch, 0.1 Mi S Of W Bellfort.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT68 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

68 ft end to end, longest span 22 ft. Lengths and the car 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.

Built196957 years old
Length67.9 ft20.7 m
Daily traffic750counted 2010
Last inspectedAugust 2023every 24 months

Location

StateTexas
CountyHarris
Location0.1 Mi S Of W Bellfort
CarriesBenning DR
CrossesChimney Rock Ditch
Coordinates29.65788, -95.47674

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length67.9 ft (20.7 m)
Max Span22.0 ft (6.7 m)
Deck Width35.4 ft (10.8 m)
Deck Area223.6 sq m
Main Spans3
Year Built1969

Traffic

Avg Daily Traffic750 (2010)
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical6 — Scour calculated, stable
Structure Number121020B07177677

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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