Structure 150460172802087 · Comal County, TX

FM 306 over Trib To Alligator Creek

Carries FM 306 over Trib To Alligator Creek, 2.4 Miles North Of Fm1102.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT33 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 33 ft across with 4 openings. Lengths and the car 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, so those are drawn as typical for a culvert.

Built1969rebuilt 2018
Length33.5 ft10.2 m
Daily traffic19,428counted 2020
Last inspectedJune 2024every 24 months

Location

StateTexas
CountyComal
Location2.4 Miles North Of Fm1102
CarriesFM 306
CrossesTrib To Alligator Creek
Coordinates29.77153, -98.10476

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length33.5 ft (10.2 m)
Max Span6.9 ft (2.1 m)
Deck Area205.0 sq m
Main Spans4
Year Built1969 (reconstructed 2018)

Traffic

Avg Daily Traffic19,428 (2020)
Truck Traffic5%
Lanes On Bridge5

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number150460172802087

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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