US Bridges

Castor Road over Neaton Drain

Good

St. Clair County, Michigan · Sec. 1-2 Wales Twp. · Structure no. 000000000010246

Built
2021
4 years old
Condition
Good
inspected May 2023
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
22 ft
1 main span
Daily traffic
300
2020 count
Owner
County
County Highway Agency

About this bridge

Castor Road over Neaton Drain is a aluminum, wrought iron, or cast iron culvert carrying Castor Road over Neaton Drain in St. Clair County, Michigan. It was built in 2021, so it is 4 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 300 vehicles a day, roughly 3% of them trucks, projected to reach 366 by 2040. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCastor Road
CrossesNeaton Drain
LocationSec. 1-2 Wales Twp.
RouteCounty Highway 0
CountySt. Clair County
StateMichigan
Coordinates42.98348, -82.64485
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating77.2 US tons
Inventory rating65 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans1
Design loadGreater than HL 93
Structure length22 ft (6.7 m)
Longest span22 ft (6.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2020)
Projected traffic366 by 2040
Trucks3%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$570,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Castor Road over Neaton Drain built?

It was built in 2021, making it 4 years old in 2025.

What condition is Castor Road over Neaton Drain 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 May 2023.

How much traffic does Castor Road over Neaton Drain carry?

About 300 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is Castor Road over Neaton Drain?

The structure is 22 ft (6.7 m) long with a longest span of 22 ft (6.7 m).

Who owns Castor Road over Neaton Drain?

It is owned by the County Highway Agency.