US Bridges

Tompkins Road over Armstrong Branch

Good

Montgomery County, Mississippi · Sec 32 T18N R 7E · Structure no. SA4900000000044

Built
2006
19 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
30
2023 count
Owner
County
County Highway Agency

About this bridge

Tompkins Road over Armstrong Branch is a concrete culvert carrying Tompkins Road over Armstrong Branch in Montgomery County, Mississippi. It was built in 2006, so it is 19 years old, younger than the Mississippi average of 38.9 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 30 vehicles a day, roughly 8% of them trucks, projected to reach 45 by 2043. The structure is 21 ft (6.3 m) long. If it were closed, the detour would be 5 mi (8 km).

CarriesTompkins Road
CrossesArmstrong Branch
LocationSec 32 T18N R 7E
RouteCounty Highway 85
Coordinates33.38694, -89.5775
Functional classRural Local

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 protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.3 m)
Longest span10 ft (3.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2023)
Projected traffic45 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$450,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Tompkins Road over Armstrong Branch built?

It was built in 2006, making it 19 years old in 2025.

What condition is Tompkins Road over Armstrong Branch 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 Tompkins Road over Armstrong Branch carry?

About 30 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Tompkins Road over Armstrong Branch?

The structure is 21 ft (6.3 m) long with a longest span of 10 ft (3.1 m).

Who owns Tompkins Road over Armstrong Branch?

It is owned by the County Highway Agency.