US Bridges

SH 121 over Drain

Fair

Denton County, Texas · 2.36 MI NE of IH 35E · Structure no. 180610354701007

Built
1999
26 years old, rebuilt 2005
Condition
Fair
inspected November 2023
Type
Culvert
Concrete
Length
52 ft
4 main spans
Daily traffic
16,000
2013 count
Owner
Toll Authority
Local Toll Authority

About this bridge

SH 121 over Drain is a concrete culvert carrying SH 121 over Drain in Denton County, Texas. It was built in 1999 and reconstructed in 2005, so it is 26 years old, younger than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 16,000 vehicles a day, projected to reach 18,000 by 2033. The structure is 52 ft (15.9 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSH 121
CrossesDrain
Location2.36 MI NE of IH 35E
CountyDenton County
StateTexas
Coordinates33.01449, -96.94047
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length52 ft (15.9 m)
Longest span5 ft (1.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,000 (2013)
Projected traffic18,000 by 2033
Trucks0%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a toll road
National Highway SystemNo

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 121 over Drain built?

It was built in 1999, making it 26 years old in 2025. It was reconstructed in 2005.

What condition is SH 121 over Drain in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2023.

How much traffic does SH 121 over Drain carry?

About 16,000 vehicles per day (2013 count).

How long is SH 121 over Drain?

The structure is 52 ft (15.9 m) long with a longest span of 5 ft (1.5 m).

Who owns SH 121 over Drain?

It is owned by the Local Toll Authority.