US Bridges

Sienna Pkwy over Drainage Ditch

Good

Fort Bend County, Texas · 1.13 MI W of FM 521 · Structure no. 120800AA1107228

Built
2018
7 years old
Condition
Good
inspected December 2023
Type
Culvert
Steel
Length
60 ft
3 main spans
Daily traffic
2,000
2020 count
Owner
County
County Highway Agency

About this bridge

Sienna Pkwy over Drainage Ditch is a steel culvert carrying Sienna Pkwy over Drainage Ditch in Fort Bend County, Texas. It was built in 2018, so it is 7 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 2,000 vehicles a day, roughly 1% of them trucks, projected to reach 4,000 by 2040. The structure is 60 ft (18.3 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSienna Pkwy
CrossesDrainage Ditch
Location1.13 MI W of FM 521
RouteCounty Highway 0
CountyFort Bend County
StateTexas
Coordinates29.47654, -95.48859
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2020)
Projected traffic4,000 by 2040
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 over Drainage Ditch built?

It was built in 2018, making it 7 years old in 2025.

What condition is Sienna Pkwy 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 December 2023.

How much traffic does Sienna Pkwy over Drainage Ditch carry?

About 2,000 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Sienna Pkwy over Drainage Ditch?

The structure is 60 ft (18.3 m) long with a longest span of 12 ft (3.7 m).

Who owns Sienna Pkwy over Drainage Ditch?

It is owned by the County Highway Agency.