Structure 201240AA0275002 · Jefferson County, TX

Tyrrell Park RD over Willow Marsh Bayou

Carries Tyrrell Park RD over Willow Marsh Bayou, 1.4 Mi S Of SH 124.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT150 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

150 ft end to end, longest span 25 ft: about 2 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.

Built197056 years old
Length149.9 ft45.7 m
Daily traffic175counted 2016
Last inspectedJuly 2023every 24 months

Location

StateTexas
CountyJefferson
Location1.4 Mi S Of SH 124
CarriesTyrrell Park RD
CrossesWillow Marsh Bayou
Coordinates30.00231, -94.15509

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length149.9 ft (45.7 m)
Max Span24.9 ft (7.6 m)
Deck Width34.1 ft (10.4 m)
Deck Area475.3 sq m
Main Spans6
Year Built1970

Traffic

Avg Daily Traffic175 (2016)
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical6 — Scour calculated, stable
Structure Number201240AA0275002

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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