US Bridges

21st Street over Pine Creek

Fair

Allegan County, Michigan · Just South of 102nd Ave · Structure no. 000000000000202

Built
1968
57 years old
Condition
Fair
inspected September 2023
Type
Slab
Wood or Timber
Length
40 ft
2 main spans
Daily traffic
1,565
2003 count
Owner
County
County Highway Agency

About this bridge

21st Street over Pine Creek is a wood or timber slab carrying 21st Street over Pine Creek in Allegan County, Michigan. It was built in 1968, so it is 57 years old, older 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 1,565 vehicles a day, roughly 7% of them trucks, projected to reach 3,130 by 2023. The structure is 40 ft (12.2 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
Carries21st Street
CrossesPine Creek
LocationJust South of 102nd Ave
RouteCounty Highway 306
CountyAllegan County
StateMichigan
Coordinates42.43319, -85.74476
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60.4 US tons
Inventory rating42.5 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadHS 20 + Mod
Structure length40 ft (12.2 m)
Longest span20 ft (6.1 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,565 (2003)
Projected traffic3,130 by 2023
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 21st Street over Pine Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is 21st Street over Pine Creek 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 2023.

How much traffic does 21st Street over Pine Creek carry?

About 1,565 vehicles per day (2003 count), of which roughly 7% are trucks.

How long is 21st Street over Pine Creek?

The structure is 40 ft (12.2 m) long with a longest span of 20 ft (6.1 m) and a deck 30 ft wide.

Who owns 21st Street over Pine Creek?

It is owned by the County Highway Agency.