Structure 171980038204020 · Robertson County, TX

SH 7 over Navasota River Rel No 2

Carries SH 7 over Navasota River Rel No 2, 4.8 Mi E Of FM 979.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating4/9 · Poor
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT455 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 4/9 · sets the rating

455 ft end to end, longest span 30 ft: about 6 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.

Built195670 years old
Length455.1 ft138.7 m
Daily traffic3,572counted 2023
Last inspectedNovember 2024every 24 months

Location

StateTexas
CountyRobertson
Location4.8 Mi E Of FM 979
CarriesSH 7
CrossesNavasota River Rel No 2
Coordinates31.25484, -96.33474

Physical Characteristics

MaterialConcrete
DesignStringer/Multi-beam
Total Length455.1 ft (138.7 m)
Max Span29.9 ft (9.1 m)
Deck Width31.2 ft (9.5 m)
Deck Area1317.7 sq m
Main Spans15
Year Built1956

Traffic

Avg Daily Traffic3,572 (2023)
Truck Traffic24%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number171980038204020

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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