Structure 121020351005093 · Harris County, TX

SH 99 Sbml over Morton Ranch RD

Carries SH 99 Sbml over Morton Ranch RD, 2.19 Mi N Of IH 10.

Overall conditionFair

Set by its lowest-rated component: Deck at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT383 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

383 ft end to end, longest span 147 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.

Built201412 years old
Length382.9 ft116.7 m
Daily traffic28,600counted 2010
Last inspectedAugust 2022every 48 months

Location

StateTexas
CountyHarris
Location2.19 Mi N Of IH 10
CarriesSH 99 Sbml
CrossesMorton Ranch RD
Coordinates29.81714, -95.77112

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length382.9 ft (116.7 m)
Max Span147.0 ft (44.8 m)
Deck Width44.0 ft (13.4 m)
Deck Area1563.8 sq m
Main Spans3
Year Built2014

Traffic

Avg Daily Traffic28,600 (2010)
Lanes On Bridge2
Lanes Under Bridge6

Inspection & Ownership

Last InspectionAugust 2022
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number121020351005093

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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