Structure 170210005002053 · Brazos County, TX

SH 6 NB over Navasota River

Carries SH 6 NB over Navasota River, 1.95 Mi SE Of FM 2154.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT580 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 8/9Substructure 6/9 · sets the rating

580 ft end to end: about 1.6 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.

Built197155 years old
Length580.1 ft176.8 m
Daily traffic18,547counted 2021
Last inspectedFebruary 2023every 24 months

Location

StateTexas
CountyBrazos
Location1.95 Mi SE Of FM 2154
CarriesSH 6 NB
CrossesNavasota River
Coordinates30.41899, -96.10632

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length580.1 ft (176.8 m)
Max Span89.9 ft (27.4 m)
Deck Width44.3 ft (13.5 m)
Deck Area2386.8 sq m
Main Spans1
Year Built1971

Traffic

Avg Daily Traffic18,547 (2021)
Truck Traffic15%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical7 — Countermeasures installed
Structure Number170210005002053

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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