US Bridges

SH 6 NB Off Ramp over Drain

Good

Grimes County, Texas · 1.7 MI S of SH 90 · Structure no. 170940005003051

Built
1970
55 years old
Condition
Good
inspected May 2023
Type
Culvert
Concrete
Length
23 ft
3 main spans
Daily traffic
1,415
2019 count
Owner
State
State Highway Agency

About this bridge

SH 6 NB Off Ramp over Drain is a concrete culvert carrying SH 6 NB Off Ramp over Drain in Grimes County, Texas. It was built in 1970, so it is 55 years old, older 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 1,415 vehicles a day, roughly 11% of them trucks, projected to reach 1,783 by 2039. The structure is 23 ft (7 m) long.

CarriesSH 6 NB Off Ramp
CrossesDrain
Location1.7 MI S of SH 90
RouteState Highway 6
StateTexas
Coordinates30.37279, -96.06647
Functional classRural Principal Arterial - Other

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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 spans3
Design loadHS 20
Structure length23 ft (7 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 traffic1,415 (2019)
Projected traffic1,783 by 2039
Trucks11%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 6 NB Off Ramp over Drain built?

It was built in 1970, making it 55 years old in 2025.

What condition is SH 6 NB Off Ramp 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 May 2023.

How much traffic does SH 6 NB Off Ramp over Drain carry?

About 1,415 vehicles per day (2019 count), of which roughly 11% are trucks.

How long is SH 6 NB Off Ramp over Drain?

The structure is 23 ft (7 m) long with a longest span of 5 ft (1.5 m).

Who owns SH 6 NB Off Ramp over Drain?

It is owned by the State Highway Agency.