US Bridges

Underwood Road over Canal

FairPosted for load

Washington County, Mississippi · Sec 8 T16N R 6W · Structure no. SA7600000000103

Built
1973
52 years old
Condition
Fair
inspected September 2024
Type
Channel Beam
Concrete
Length
31 ft
1 main span
Daily traffic
50
2024 count
Owner
County
County Highway Agency

About this bridge

Underwood Road over Canal is a concrete channel beam carrying Underwood Road over Canal in Washington County, Mississippi. It was built in 1973, so it is 52 years old, older than the Mississippi average of 38.9 years.

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

It carries about 50 vehicles a day, roughly 8% of them trucks, projected to reach 70 by 2044. The structure is 31 ft (9.4 m) long and 28 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesUnderwood Road
CrossesCanal
LocationSec 8 T16N R 6W
RouteCounty Highway 1017
CountyWashington County
StateMississippi
Coordinates33.24234, -90.84274
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating23.5 US tons
Inventory rating14.1 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadH 15
Structure length31 ft (9.4 m)
Longest span31 ft (9.4 m)
Deck width28 ft (8.5 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2024)
Projected traffic70 by 2044
Trucks8%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$433,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Underwood Road over Canal built?

It was built in 1973, making it 52 years old in 2025.

What condition is Underwood Road over Canal 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 September 2024.

How much traffic does Underwood Road over Canal carry?

About 50 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Underwood Road over Canal?

The structure is 31 ft (9.4 m) long with a longest span of 31 ft (9.4 m) and a deck 28 ft wide.

Who owns Underwood Road over Canal?

It is owned by the County Highway Agency.