Structure 201240B00359002 · Jefferson County, TX

Dowlen RD over Hillebrandt Bayou

Carries Dowlen RD over Hillebrandt Bayou, 1.5 Mi SW Of US 69.

Overall conditionFair

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

How ratings work
Culvertsets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT46 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 6/9

A culvert 46 ft across with 3 openings. 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, so those are drawn as typical for a culvert.

Built197848 years old
Length45.9 ft14 m
Daily traffic21,940counted 2015
Last inspectedJuly 2023every 24 months

Location

StateTexas
CountyJefferson
Location1.5 Mi SW Of US 69
CarriesDowlen RD
CrossesHillebrandt Bayou
Coordinates30.11296, -94.16862

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length45.9 ft (14 m)
Max Span9.8 ft (3 m)
Deck Width98.4 ft (30 m)
Deck Area420 sq m
Main Spans3
Year Built1978

Traffic

Avg Daily Traffic21,940 (2015)
Lanes On Bridge4

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number201240B00359002

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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