Structure 171450067503139 · Leon County, TX

IH 45 SB over SH 164

Carries IH 45 SB over SH 164, 1.35 Mi N Of US 79.

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 FT155 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

155 ft end to end: 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 multi-beam bridge.

Built196957 years old
Length154.9 ft47.2 m
Daily traffic16,353counted 2019
Last inspectedMarch 2023every 24 months

Location

StateTexas
CountyLeon
Location1.35 Mi N Of US 79
CarriesIH 45 SB
CrossesSH 164
Coordinates31.46828, -96.08711

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length154.9 ft (47.2 m)
Max Span75.1 ft (22.9 m)
Deck Width42.7 ft (13 m)
Deck Area613.6 sq m
Main Spans1
Year Built1969

Traffic

Avg Daily Traffic16,353 (2019)
Truck Traffic38%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour CriticalNot applicable
Structure Number171450067503139

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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