US Bridges

M-20 over Ryan Creek

Good

Mecosta County, Michigan · Big Rapids Twp Sec 13 · Structure no. 000000000006747

Built
2000
25 years old
Condition
Good
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
49 ft
1 main span
Daily traffic
2,522
2007 count
Owner
State
State Highway Agency

About this bridge

M-20 over Ryan Creek is a prestressed concrete box beam or girders - multiple carrying M-20 over Ryan Creek in Mecosta County, Michigan. It was built in 2000, so it is 25 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 2,522 vehicles a day, roughly 10% of them trucks, projected to reach 3,533 by 2018. The structure is 49 ft (15 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesM-20
CrossesRyan Creek
LocationBig Rapids Twp Sec 13
RouteState Highway 20
CountyMecosta County
StateMichigan
Coordinates43.69159, -85.4569
Functional classRural Minor Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating99.3 US tons
Inventory rating60 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length49 ft (15 m)
Longest span45 ft (13.8 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,522 (2007)
Projected traffic3,533 by 2018
Trucks10%
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

OwnerState Highway Agency
Maintained byState 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 M-20 over Ryan Creek built?

It was built in 2000, making it 25 years old in 2025.

What condition is M-20 over Ryan 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 June 2023.

How much traffic does M-20 over Ryan Creek carry?

About 2,522 vehicles per day (2007 count), of which roughly 10% are trucks.

How long is M-20 over Ryan Creek?

The structure is 49 ft (15 m) long with a longest span of 45 ft (13.8 m) and a deck 47 ft wide.

Who owns M-20 over Ryan Creek?

It is owned by the State Highway Agency.