US Bridges

Donahoe Road over Natural Slough

Poor

Sunflower County, Mississippi · Sec 16 T20N R 4W · Structure no. SA6700000000089

Built
1951
74 years old
Condition
Poor
inspected January 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
38 ft
2 main spans
Daily traffic
40
2024 count
Owner
County
County Highway Agency

About this bridge

Donahoe Road over Natural Slough is a wood or timber stringer/multi-beam or girder carrying Donahoe Road over Natural Slough in Sunflower County, Mississippi. It was built in 1951, so it is 74 years old, older than the Mississippi average of 38.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 2 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: open, temporary structure in place while original is closed.

It carries about 40 vehicles a day, roughly 8% of them trucks, projected to reach 60 by 2044. The structure is 38 ft (11.6 m) long and 22 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesDonahoe Road
CrossesNatural Slough
LocationSec 16 T20N R 4W
RouteCounty Highway 256
Coordinates33.5725, -90.60917
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Substructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 12 months
Operating statusOpen, temporary structure in place while original is closed
ScourUnknown foundation; not evaluated for scour
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy0: Immediate repair necessary to put back in service
Approach roadway alignment7: Better than present minimum criteria
Operating rating0 US tons
Inventory rating0 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadH 15
Structure length38 ft (11.6 m)
Longest span19 ft (5.8 m)
Deck width22 ft (6.7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2024)
Projected traffic60 by 2044
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed9.9 mi (16 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 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Donahoe Road over Natural Slough built?

It was built in 1951, making it 74 years old in 2025.

What condition is Donahoe Road over Natural Slough in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2024.

How much traffic does Donahoe Road over Natural Slough carry?

About 40 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Donahoe Road over Natural Slough?

The structure is 38 ft (11.6 m) long with a longest span of 19 ft (5.8 m) and a deck 22 ft wide.

Who owns Donahoe Road over Natural Slough?

It is owned by the County Highway Agency.