Structure 211090086401002 · Hidalgo County, TX

FM 494 over Hc Mission Lateral

Carries FM 494 over Hc Mission Lateral, 1.40 Mi S Of FM 1924.

Overall conditionGood

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

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT61 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

61 ft end to end, longest span 30 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 bridge of this kind.

Built1990rebuilt 2009
Length61.0 ft18.6 m
Daily traffic14,866counted 2020
Last inspectedApril 2023every 24 months

Location

StateTexas
CountyHidalgo
Location1.40 Mi S Of FM 1924
CarriesFM 494
CrossesHc Mission Lateral
Coordinates26.23327, -98.28205

Physical Characteristics

MaterialPrestressed Concrete
DesignOther
Total Length61.0 ft (18.6 m)
Max Span29.9 ft (9.1 m)
Deck Width78.1 ft (23.8 m)
Deck Area442.7 sq m
Main Spans2
Year Built1990 (reconstructed 2009)

Traffic

Avg Daily Traffic14,866 (2020)
Truck Traffic2%
Lanes On Bridge5

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number211090086401002

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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