US Bridges

Three Mile Lake RD over Mound Bayou

Good

Sunflower County, Mississippi · Sec 36 T18N R 4W B · Structure no. SA6700000000038

Built
1992
33 years old
Condition
Good
inspected September 2024
Type
Culvert
Concrete
Length
29 ft
2 main spans
Daily traffic
280
2024 count
Owner
County
County Highway Agency

About this bridge

Three Mile Lake RD over Mound Bayou is a concrete culvert carrying Three Mile Lake RD over Mound Bayou in Sunflower County, Mississippi. It was built in 1992, so it is 33 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 280 vehicles a day, roughly 8% of them trucks, projected to reach 420 by 2044. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 5 mi (8 km).

CarriesThree Mile Lake RD
CrossesMound Bayou
LocationSec 36 T18N R 4W B
RouteCounty Highway 1617
Coordinates33.37264, -90.56396
Functional classRural Major Collector

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.
Culvert8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating67.9 US tons
Inventory rating40.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length29 ft (8.8 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic280 (2024)
Projected traffic420 by 2044
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 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Three Mile Lake RD over Mound Bayou built?

It was built in 1992, making it 33 years old in 2025.

What condition is Three Mile Lake RD over Mound Bayou 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 September 2024.

How much traffic does Three Mile Lake RD over Mound Bayou carry?

About 280 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Three Mile Lake RD over Mound Bayou?

The structure is 29 ft (8.8 m) long with a longest span of 12 ft (3.7 m).

Who owns Three Mile Lake RD over Mound Bayou?

It is owned by the County Highway Agency.