Structure 142460T00183003 · Williamson County, TX

183a NB Ent Ramp over 183a NB Exit Ramp

Carries 183a NB Ent Ramp over 183a NB Exit Ramp, 1.2 Mi N Of SH 45.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT625 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

625 ft end to end, longest span 125 ft: about 1.7 football fields. 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.

Built200719 years old
Length625.0 ft190.5 m
Daily traffic930counted 2020
Last inspectedSeptember 2023every 48 months

Location

StateTexas
CountyWilliamson
Location1.2 Mi N Of SH 45
Carries183a NB Ent Ramp
Crosses183a NB Exit Ramp
Coordinates30.48466, -97.80434

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length625.0 ft (190.5 m)
Max Span125.0 ft (38.1 m)
Deck Width27.9 ft (8.5 m)
Deck Area1619.2 sq m
Main Spans5
Year Built2007

Traffic

Avg Daily Traffic930 (2020)
Truck Traffic5%
Lanes On Bridge1
Lanes Under Bridge1

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 48 months
OwnerLocal Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number142460T00183003

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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