US Bridges

US 45 over Tenn Tom Waterway

Good

Monroe County, Mississippi · 11.9 MI N Lowndes Cl · Structure no. 21000450481876A

Built
1981
44 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
2,402 ft
3 main spans
Daily traffic
4,600
2023 count
Owner
State
State Highway Agency

About this bridge

US 45 over Tenn Tom Waterway is a steel continuous stringer/multi-beam or girder carrying US 45 over Tenn Tom Waterway in Monroe County, Mississippi. It was built in 1981, so it is 44 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 4,600 vehicles a day, roughly 10% of them trucks, projected to reach 6,000 by 2043. The structure is 2,402 ft (732.2 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 45
CrossesTenn Tom Waterway
Location11.9 MI N Lowndes Cl
RouteU.S. Route 45
Coordinates33.81741, -88.52068
Functional classRural Principal Arterial - Other

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 protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.5 US tons
Inventory rating30.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+14 approach)
Design loadHS 20
Structure length2,402 ft (732.2 m)
Longest span400 ft (121.9 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,600 (2023)
Projected traffic6,000 by 2043
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was US 45 over Tenn Tom Waterway built?

It was built in 1981, making it 44 years old in 2025.

What condition is US 45 over Tenn Tom Waterway 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 2024.

How much traffic does US 45 over Tenn Tom Waterway carry?

About 4,600 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is US 45 over Tenn Tom Waterway?

The structure is 2,402 ft (732.2 m) long with a longest span of 400 ft (121.9 m) and a deck 43 ft wide.

Who owns US 45 over Tenn Tom Waterway?

It is owned by the State Highway Agency.