Structure 121020B14401602 · Harris County, TX

Chimney Rock RD over Brays Bayou

Carries Chimney Rock RD over Brays Bayou, 0.1 Mi N Of S Braeswood.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructure9/9 · Excellent
Substructure8/9 · Very Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT234 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 9/9Substructure 8/9

234 ft end to end, longest span 84 ft: about 3 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 box-beam bridge.

Built20224 years old
Length233.9 ft71.3 m
Daily traffic15,230counted 2022
Last inspectedAugust 2023every 24 months

Location

StateTexas
CountyHarris
Location0.1 Mi N Of S Braeswood
CarriesChimney Rock RD
CrossesBrays Bayou
Coordinates29.67749, -95.47667

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length233.9 ft (71.3 m)
Max Span84.0 ft (25.6 m)
Deck Width77.4 ft (23.6 m)
Deck Area1682.7 sq m
Main Spans3
Year Built2022

Traffic

Avg Daily Traffic15,230 (2022)
Truck Traffic4%
Lanes On Bridge5

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number121020B14401602

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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