US Bridges

SH 121 over Drain

Good

Denton County, Texas · 4.95 MI NE of IH 35E · Structure no. 180610036403094

Built
1994
31 years old, rebuilt 1997
Condition
Good
inspected April 2023
Type
Culvert
Concrete
Length
65 ft
7 main spans
Daily traffic
31,000
2008 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 1994 and reconstructed in 1997, 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 31,000 vehicles a day, roughly 7% of them trucks, projected to reach 58,900 by 2028. The structure is 65 ft (19.8 m) long.

CarriesSH 121
CrossesDrain
Location4.95 MI NE of IH 35E
StateTexas
Coordinates33.05426, -96.91438
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionApril 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 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 spans7
Design loadHS 20
Structure length65 ft (19.8 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 traffic31,000 (2008)
Projected traffic58,900 by 2028
Trucks7%
Lanes on structure14
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 121 over Drain built?

It was built in 1994, making it 31 years old in 2025. It was reconstructed in 1997.

What condition is SH 121 over Drain 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 April 2023.

How much traffic does SH 121 over Drain carry?

About 31,000 vehicles per day (2008 count), of which roughly 7% are trucks.

How long is SH 121 over Drain?

The structure is 65 ft (19.8 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.