Structure 121020027114120 · Harris County, TX

IH 610 SB over Up Rr & Old Lib RD

Carries IH 610 SB over Up Rr & Old Lib RD, 0.5 Mi NW Of US 90.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT665 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 6/9

665 ft end to end: about 1.8 football fields. 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.

Built1964rebuilt 1977
Length665.0 ft202.7 m
Daily traffic60,280counted 2013
Last inspectedNovember 2024every 24 months

Location

StateTexas
CountyHarris
Location0.5 Mi NW Of US 90
CarriesIH 610 SB
CrossesUp Rr & Old Lib RD
Coordinates29.80256, -95.28026

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length665.0 ft (202.7 m)
Max Span65.0 ft (19.8 m)
Deck Width82.7 ft (25.2 m)
Deck Area5108.0 sq m
Main Spans1
Year Built1964 (reconstructed 1977)

Traffic

Avg Daily Traffic60,280 (2013)
Truck Traffic9%
Lanes On Bridge5
Lanes Under Bridge4

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour CriticalNot applicable
Structure Number121020027114120

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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