US Bridges

Sienna Pkwy NB over Drainage Ditch

Good

Fort Bend County, Texas · 2.45 MI S of SH 6 · Structure no. 120800R01107001

Built
1988
37 years old
Condition
Good
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
180 ft
3 main spans
Daily traffic
500
2015 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Sienna Pkwy NB over Drainage Ditch is a prestressed concrete box beam or girders - multiple carrying Sienna Pkwy NB over Drainage Ditch in Fort Bend County, Texas. It was built in 1988, so it is 37 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 500 vehicles a day, projected to reach 1,000 by 2035. The structure is 180 ft (54.9 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSienna Pkwy NB
CrossesDrainage Ditch
Location2.45 MI S of SH 6
RouteCity Street 0
CountyFort Bend County
StateTexas
Coordinates29.50644, -95.52411
Functional classUrban Local

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length180 ft (54.9 m)
Longest span60 ft (18.3 m)
Deck width34 ft (10.5 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2015)
Projected traffic1,000 by 2035
Trucks0%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Sienna Pkwy NB over Drainage Ditch built?

It was built in 1988, making it 37 years old in 2025.

What condition is Sienna Pkwy NB over Drainage Ditch 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 2023.

How much traffic does Sienna Pkwy NB over Drainage Ditch carry?

About 500 vehicles per day (2015 count).

How long is Sienna Pkwy NB over Drainage Ditch?

The structure is 180 ft (54.9 m) long with a longest span of 60 ft (18.3 m) and a deck 34 ft wide.

Who owns Sienna Pkwy NB over Drainage Ditch?

It is owned by the Town or Township Highway Agency.