US Bridges

Ryan RD over Big Beaver Drain

Fair

Macomb County, Michigan · S of 15 Mile RD · Structure no. 000000000006427

Built
1983
42 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
34 ft
2 main spans
Daily traffic
28,824
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Ryan RD over Big Beaver Drain is a concrete culvert carrying Ryan RD over Big Beaver Drain in Macomb County, Michigan. It was built in 1983, so it is 42 years old, younger than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 28,824 vehicles a day, roughly 5% of them trucks, projected to reach 31,848 by 2044. The structure is 34 ft (10.3 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesRyan RD
CrossesBig Beaver Drain
LocationS of 15 Mile RD
RouteCity Street 2058
Coordinates42.54946, -83.06924
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating68.6 US tons
Inventory rating41.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length34 ft (10.3 m)
Longest span12 ft (3.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,824 (2024)
Projected traffic31,848 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 Big Beaver Drain built?

It was built in 1983, making it 42 years old in 2025.

What condition is Ryan RD over Big Beaver Drain in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.

How much traffic does Ryan RD over Big Beaver Drain carry?

About 28,824 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Ryan RD over Big Beaver Drain?

The structure is 34 ft (10.3 m) long with a longest span of 12 ft (3.6 m).

Who owns Ryan RD over Big Beaver Drain?

It is owned by the City or Municipal Highway Agency.