US Bridges

Grogans Mill RD over Drainage Ditch

Fair

Montgomery County, Texas · 0.15 MI S of Research for · Structure no. 121700AA0681002

Built
1989
36 years old, rebuilt 1992
Condition
Fair
inspected November 2023
Type
Culvert
Concrete
Length
30 ft
3 main spans
Daily traffic
20,000
2015 count
Owner
County
County Highway Agency

About this bridge

Grogans Mill RD over Drainage Ditch is a concrete culvert carrying Grogans Mill RD over Drainage Ditch in Montgomery County, Texas. It was built in 1989 and reconstructed in 1992, so it is 36 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 20,000 vehicles a day, roughly 1% of them trucks, projected to reach 30,000 by 2032. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesGrogans Mill RD
CrossesDrainage Ditch
Location0.15 MI S of Research for
RouteCounty Highway 0
CountyMontgomery County
StateTexas
Coordinates30.15081, -95.48118
Functional classUrban Minor Arterial

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 evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,000 (2015)
Projected traffic30,000 by 2032
Trucks1%
Lanes on structure6
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 Grogans Mill RD over Drainage Ditch built?

It was built in 1989, making it 36 years old in 2025. It was reconstructed in 1992.

What condition is Grogans Mill RD over Drainage Ditch 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 Grogans Mill RD over Drainage Ditch carry?

About 20,000 vehicles per day (2015 count), of which roughly 1% are trucks.

How long is Grogans Mill RD over Drainage Ditch?

The structure is 30 ft (9.1 m) long with a longest span of 8 ft (2.4 m).

Who owns Grogans Mill RD over Drainage Ditch?

It is owned by the County Highway Agency.