Structure 142460015105112 · Williamson County, TX

US 183 NB over Anderson Mill RD

Carries US 183 NB over Anderson Mill RD, 1.4 Mile South Rm620/lp45.

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 FT325 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

325 ft end to end, longest span 125 ft: about 5 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.

Built200323 years old
Length325.1 ft99.1 m
Daily traffic65,375counted 2019
Last inspectedFebruary 2023every 48 months

Location

StateTexas
CountyWilliamson
Location1.4 Mile South Rm620/lp45
CarriesUS 183 NB
CrossesAnderson Mill RD
Coordinates30.44886, -97.79037

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length325.1 ft (99.1 m)
Max Span125.0 ft (38.1 m)
Deck Width83.3 ft (25.4 m)
Deck Area2517.1 sq m
Main Spans3
Year Built2003

Traffic

Avg Daily Traffic65,375 (2019)
Truck Traffic2%
Lanes On Bridge5
Lanes Under Bridge6

Inspection & Ownership

Last InspectionFebruary 2023
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number142460015105112

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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