US Bridges

Three Mile Lake RD over Three Mile Lake

Good

Sunflower County, Mississippi · Sec 3 T17N R 3W B · Structure no. SA6700000000001

Built
1975
50 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
240 ft
6 main spans
Daily traffic
380
2024 count
Owner
County
County Highway Agency

About this bridge

Three Mile Lake RD over Three Mile Lake is a prestressed concrete stringer/multi-beam or girder carrying Three Mile Lake RD over Three Mile Lake in Sunflower County, Mississippi. It was built in 1975, so it is 50 years old, older 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 380 vehicles a day, roughly 8% of them trucks, projected to reach 570 by 2044. The structure is 240 ft (73.2 m) long and 29 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesThree Mile Lake RD
CrossesThree Mile Lake
LocationSec 3 T17N R 3W B
RouteCounty Highway 1617
Coordinates33.35861, -90.49806
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.8 US tons
Inventory rating23.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length240 ft (73.2 m)
Longest span40 ft (12.2 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic380 (2024)
Projected traffic570 by 2044
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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$1.5 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Three Mile Lake RD over Three Mile Lake built?

It was built in 1975, making it 50 years old in 2025.

What condition is Three Mile Lake RD over Three Mile Lake 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 August 2024.

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

About 380 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Three Mile Lake RD over Three Mile Lake?

The structure is 240 ft (73.2 m) long with a longest span of 40 ft (12.2 m) and a deck 29 ft wide.

Who owns Three Mile Lake RD over Three Mile Lake?

It is owned by the County Highway Agency.