US Bridges

Ryan RD over Plum Brook Drain

Good

Macomb County, Michigan · North of 18.5 Mile RD · Structure no. 000000000006428

Built
1999
26 years old
Condition
Good
inspected September 2024
Type
Culvert
Concrete
Length
32 ft
1 main span
Daily traffic
22,653
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Ryan RD over Plum Brook Drain is a concrete culvert carrying Ryan RD over Plum Brook Drain in Macomb County, Michigan. It was built in 1999, so it is 26 years old, younger than the Michigan average of 48.3 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 22,653 vehicles a day, roughly 5% of them trucks, projected to reach 25,030 by 2044. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesRyan RD
CrossesPlum Brook Drain
LocationNorth of 18.5 Mile RD
RouteCity Street 2058
Coordinates42.60146, -83.07109
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating75.6 US tons
Inventory rating45 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 25 or greater
Structure length32 ft (9.8 m)
Longest span32 ft (9.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,653 (2024)
Projected traffic25,030 by 2044
Trucks5%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ryan RD over Plum Brook Drain built?

It was built in 1999, making it 26 years old in 2025.

What condition is Ryan RD over Plum Brook Drain 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 Ryan RD over Plum Brook Drain carry?

About 22,653 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Ryan RD over Plum Brook Drain?

The structure is 32 ft (9.8 m) long with a longest span of 32 ft (9.8 m).

Who owns Ryan RD over Plum Brook Drain?

It is owned by the City or Municipal Highway Agency.