Structure 210310034204003 · Cameron County, TX

FM 508 over Ccwid#1 Main N Drain

Carries FM 508 over Ccwid#1 Main N Drain, 0.50 Mi W Of FM 507.

Overall conditionGood

Set by its lowest-rated component: Superstructure and Substructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT100 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 7/9 · sets the ratingSubstructure 7/9 · sets the rating

100 ft end to end, longest span 25 ft. 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 or the layout of the shorter spans, so those are drawn as typical for a slab bridge.

Built198739 years old
Length100.1 ft30.5 m
Daily traffic4,154counted 2020
Last inspectedMarch 2023every 24 months

Location

StateTexas
CountyCameron
Location0.50 Mi W Of FM 507
CarriesFM 508
CrossesCcwid#1 Main N Drain
Coordinates26.24832, -97.67806

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length100.1 ft (30.5 m)
Max Span24.9 ft (7.6 m)
Deck Width42.0 ft (12.8 m)
Deck Area390.4 sq m
Main Spans4
Year Built1987

Traffic

Avg Daily Traffic4,154 (2020)
Truck Traffic11%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number210310034204003

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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