US Bridges

Monitor Road over Mill Pond Drain

FairPosted for load

Bay County, Michigan · 0.5 MI S of Kawkawlin · Structure no. 000000000000710

Built
1972
53 years old
Condition
Fair
inspected May 2024
Type
Other
Wood or Timber
Length
30 ft
1 main span
Daily traffic
796
2000 count
Owner
County
County Highway Agency

About this bridge

Monitor Road over Mill Pond Drain is a wood or timber other carrying Monitor Road over Mill Pond Drain in Bay County, Michigan. It was built in 1972, so it is 53 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. Its operating status is: posted for load restriction.

It carries about 796 vehicles a day, roughly 2% of them trucks, projected to reach 955 by 2020. The structure is 30 ft (9.1 m) long and 41 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesMonitor Road
CrossesMill Pond Drain
Location0.5 MI S of Kawkawlin
RouteCounty Highway 0
Coordinates43.64845, -83.94641
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating33.6 US tons
Inventory rating25.7 US tons

Structure

Structure typeOther
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20 + Mod
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic796 (2000)
Projected traffic955 by 2020
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Monitor Road over Mill Pond Drain built?

It was built in 1972, making it 53 years old in 2025.

What condition is Monitor Road over Mill Pond 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 May 2024.

How much traffic does Monitor Road over Mill Pond Drain carry?

About 796 vehicles per day (2000 count), of which roughly 2% are trucks.

How long is Monitor Road over Mill Pond Drain?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 41 ft wide.

Who owns Monitor Road over Mill Pond Drain?

It is owned by the County Highway Agency.