Structure 91610001501740 · McLennan County, TX

IH 35 Nbml over Bus 77

Carries IH 35 Nbml over Bus 77, 1.43 Mi N Of Brazos River.

Overall conditionGood

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

How ratings work
Decksets the rating9/9 · Excellent
Superstructuresets the rating9/9 · Excellent
Substructuresets the rating9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT394 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 9/9Superstructure 9/9Substructure 9/9

394 ft end to end, longest span 164 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 box-beam bridge.

Built20224 years old
Length394.0 ft120.1 m
Daily traffic96,378counted 2023
Last inspectedApril 2023every 24 months

Location

StateTexas
CountyMcLennan
Location1.43 Mi N Of Brazos River
CarriesIH 35 Nbml
CrossesBus 77
Coordinates31.57680, -97.11256

Physical Characteristics

MaterialSteel Continuous
DesignBox Beam - Multiple
Total Length394.0 ft (120.1 m)
Max Span164.0 ft (50 m)
Deck Width71.9 ft (21.9 m)
Deck Area2630.2 sq m
Main Spans3
Year Built2022

Traffic

Avg Daily Traffic96,378 (2023)
Truck Traffic23%
Lanes On Bridge4
Lanes Under Bridge8

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number091610001501740

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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