Structure 91610039802016 · McLennan County, TX

SH 317 over Middle Bosque River

Carries SH 317 over Middle Bosque River, 1.3 Mi N Of FM 185.

Overall conditionFair

Set by its lowest-rated component: Deck at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT361 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 6/9

361 ft end to end, longest span 60 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.

Built194779 years old
Length360.9 ft110 m
Daily traffic2,123counted 2020
Last inspectedJanuary 2023every 24 months

Location

StateTexas
CountyMcLennan
Location1.3 Mi N Of FM 185
CarriesSH 317
CrossesMiddle Bosque River
Coordinates31.55189, -97.44737

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length360.9 ft (110 m)
Max Span60.0 ft (18.3 m)
Deck Width29.2 ft (8.9 m)
Deck Area979 sq m
Main Spans2
Year Built1947

Traffic

Avg Daily Traffic2,123 (2020)
Truck Traffic27%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number091610039802016

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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