US Bridges

SH 99 over Drainage Ditch

Good

Fort Bend County, Texas · 0.95 MI N of US 59 · Structure no. 120800351004016

Built
1994
31 years old
Condition
Good
inspected November 2024
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
34,409
2023 count
Owner
Toll Authority
Local Toll Authority

About this bridge

SH 99 over Drainage Ditch is a concrete culvert carrying SH 99 over Drainage Ditch in Fort Bend County, Texas. It was built in 1994, so it is 31 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 34,409 vehicles a day, roughly 5% of them trucks, projected to reach 47,432 by 2042. The structure is 23 ft (7 m) long. If it were closed, the detour would be 8.1 mi (13 km).

CarriesSH 99
CrossesDrainage Ditch
Location0.95 MI N of US 59
RouteState Highway 99
StateTexas
Coordinates29.57459, -95.68103
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,409 (2023)
Projected traffic47,432 by 2042
Trucks5%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerLocal Toll Authority
Maintained byLocal Toll Authority
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 over Drainage Ditch built?

It was built in 1994, making it 31 years old in 2025.

What condition is SH 99 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 November 2024.

How much traffic does SH 99 over Drainage Ditch carry?

About 34,409 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is SH 99 over Drainage Ditch?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m).

Who owns SH 99 over Drainage Ditch?

It is owned by the Local Toll Authority.