US Bridges

Sienna Springs Blv over Flat Bank Creek

Good

Fort Bend County, Texas · 0.97 MI W of Sienna Pkwy · Structure no. 120800AA7777229

Built
2005
20 years old
Condition
Good
inspected December 2023
Type
Culvert
Steel
Length
27 ft
2 main spans
Daily traffic
13,459
2021 count
Owner
County
County Highway Agency

About this bridge

Sienna Springs Blv over Flat Bank Creek is a steel culvert carrying Sienna Springs Blv over Flat Bank Creek in Fort Bend County, Texas. It was built in 2005, so it is 20 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 13,459 vehicles a day, roughly 5% of them trucks, projected to reach 20,188 by 2042. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSienna Springs Blv
CrossesFlat Bank Creek
Location0.97 MI W of Sienna Pkwy
RouteCounty Highway 0
StateTexas
Coordinates29.53043, -95.55011
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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 spans2
Design loadHS 20
Structure length27 ft (8.2 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 traffic13,459 (2021)
Projected traffic20,188 by 2042
Trucks5%
Lanes on structure4
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 Springs Blv over Flat Bank Creek built?

It was built in 2005, making it 20 years old in 2025.

What condition is Sienna Springs Blv over Flat Bank Creek 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 Springs Blv over Flat Bank Creek carry?

About 13,459 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Sienna Springs Blv over Flat Bank Creek?

The structure is 27 ft (8.2 m) long with a longest span of 12 ft (3.7 m).

Who owns Sienna Springs Blv over Flat Bank Creek?

It is owned by the County Highway Agency.