US Bridges

SH 99 NB over Future Mason Road

Good

Harris County, Texas · 3.20 MI N of US 290 · Structure no. 121020351006147

Built
2015
10 years old
Condition
Good
inspected September 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
119 ft
1 main span
Daily traffic
4,000
2015 count
Owner
State
State Highway Agency

About this bridge

SH 99 NB over Future Mason Road is a prestressed concrete stringer/multi-beam or girder carrying SH 99 NB over Future Mason Road in Harris County, Texas. It was built in 2015, so it is 10 years old, younger than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,000 vehicles a day, roughly 3% of them trucks, projected to reach 6,000 by 2035. The structure is 119 ft (36.3 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSH 99 NB
CrossesFuture Mason Road
Location3.20 MI N of US 290
CountyHarris County
StateTexas
Coordinates30.04274, -95.7566
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionSeptember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length119 ft (36.3 m)
Longest span119 ft (36.3 m)
Deck width40 ft (12.2 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,000 (2015)
Projected traffic6,000 by 2035
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
Detour if closed1.2 mi (2 km)
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 99 NB over Future Mason Road built?

It was built in 2015, making it 10 years old in 2025.

What condition is SH 99 NB over Future Mason Road in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2022.

How much traffic does SH 99 NB over Future Mason Road carry?

About 4,000 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is SH 99 NB over Future Mason Road?

The structure is 119 ft (36.3 m) long with a longest span of 119 ft (36.3 m) and a deck 40 ft wide.

Who owns SH 99 NB over Future Mason Road?

It is owned by the State Highway Agency.