US Bridges

Coahoma-Moonlake over Trib of Mill Creek

Good

Coahoma County, Mississippi · Sec 20 T29N R 3W B · Structure no. SA1400000000093

Built
1970
55 years old
Condition
Good
inspected February 2024
Type
Channel Beam
Concrete
Length
57 ft
3 main spans
Daily traffic
400
2023 count
Owner
County
County Highway Agency

About this bridge

Coahoma-Moonlake over Trib of Mill Creek is a concrete channel beam carrying Coahoma-Moonlake over Trib of Mill Creek in Coahoma County, Mississippi. It was built in 1970, so it is 55 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 400 vehicles a day, roughly 20% of them trucks, projected to reach 600 by 2043. The structure is 57 ft (17.4 m) long and 25 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCoahoma-Moonlake
CrossesTrib of Mill Creek
LocationSec 20 T29N R 3W B
RouteCounty Highway 31
Coordinates34.37239, -90.53333
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating65.6 US tons
Inventory rating39.2 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadH 15
Structure length57 ft (17.4 m)
Longest span19 ft (5.8 m)
Deck width25 ft (7.5 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2023)
Projected traffic600 by 2043
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$127,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Coahoma-Moonlake over Trib of Mill Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is Coahoma-Moonlake over Trib of Mill Creek 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 February 2024.

How much traffic does Coahoma-Moonlake over Trib of Mill Creek carry?

About 400 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is Coahoma-Moonlake over Trib of Mill Creek?

The structure is 57 ft (17.4 m) long with a longest span of 19 ft (5.8 m) and a deck 25 ft wide.

Who owns Coahoma-Moonlake over Trib of Mill Creek?

It is owned by the County Highway Agency.