US Bridges

Shamrock LN over Baldwin Slough

Good

Montgomery County, Alabama · 200 Ft E of Semmes DR · Structure no. 012403

Built
1980
45 years old
Condition
Good
inspected May 2024
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
125
1990 count
Owner
City
City or Municipal Highway Agency

About this bridge

Shamrock LN over Baldwin Slough is a concrete culvert carrying Shamrock LN over Baldwin Slough in Montgomery County, Alabama. It was built in 1980, so it is 45 years old, younger than the Alabama average of 51.1 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 125 vehicles a day, roughly 1% of them trucks, projected to reach 126 by 2044. The structure is 25 ft (7.5 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesShamrock LN
CrossesBaldwin Slough
Location200 Ft E of Semmes DR
RouteCity Street 0
StateAlabama
Coordinates32.34123, -86.23838
Functional classUrban Local

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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating50 US tons
Inventory rating30 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length25 ft (7.5 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 traffic125 (1990)
Projected traffic126 by 2044
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$460,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Shamrock LN over Baldwin Slough built?

It was built in 1980, making it 45 years old in 2025.

What condition is Shamrock LN over Baldwin Slough 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 May 2024.

How much traffic does Shamrock LN over Baldwin Slough carry?

About 125 vehicles per day (1990 count), of which roughly 1% are trucks.

How long is Shamrock LN over Baldwin Slough?

The structure is 25 ft (7.5 m) long with a longest span of 12 ft (3.7 m).

Who owns Shamrock LN over Baldwin Slough?

It is owned by the City or Municipal Highway Agency.