US Bridges

Denver RD over Coldwater River

Fair

Isabella County, Michigan · 465 Ft E of N Woodruff RD · Structure no. 000000000014404

Built
1975
50 years old
Condition
Fair
inspected April 2023
Type
Culvert
Steel
Length
43 ft
3 main spans
Daily traffic
70
2021 count
Owner
County
County Highway Agency

About this bridge

Denver RD over Coldwater River is a steel culvert carrying Denver RD over Coldwater River in Isabella County, Michigan. It was built in 1975, so it is 50 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 70 vehicles a day, roughly 2% of them trucks, projected to reach 80 by 2041. The structure is 43 ft (13.1 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesDenver RD
CrossesColdwater River
Location465 Ft E of N Woodruff RD
RouteCounty Highway 0
CountyIsabella County
StateMichigan
Coordinates43.7121, -84.9666
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.7 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadUnknown
Structure length43 ft (13.1 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 traffic70 (2021)
Projected traffic80 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Denver RD over Coldwater River built?

It was built in 1975, making it 50 years old in 2025.

What condition is Denver RD over Coldwater River 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 April 2023.

How much traffic does Denver RD over Coldwater River carry?

About 70 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is Denver RD over Coldwater River?

The structure is 43 ft (13.1 m) long with a longest span of 12 ft (3.6 m).

Who owns Denver RD over Coldwater River?

It is owned by the County Highway Agency.