US Bridges

Lewiston Grade RD over E Branch Au Sable River

Good

Crawford County, Michigan · 5 Mi. NE Grayling · Structure no. 000000000002071

Built
1960
65 years old, rebuilt 2000
Condition
Good
inspected October 2024
Type
Slab
Wood or Timber
Length
22 ft
1 main span
Daily traffic
15
1999 count
Owner
County
County Highway Agency

About this bridge

Lewiston Grade RD over E Branch Au Sable River is a wood or timber slab carrying Lewiston Grade RD over E Branch Au Sable River in Crawford County, Michigan. It was built in 1960 and reconstructed in 2000, so it is 65 years old, older 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 15 vehicles a day, projected to reach 40 by 2018. The structure is 22 ft (6.7 m) long and 16 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLewiston Grade RD
CrossesE Branch Au Sable River
Location5 Mi. NE Grayling
RouteCounty Highway 0
CountyCrawford County
StateMichigan
Coordinates44.73576, -84.64174
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating34.6 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span22 ft (6.7 m)
Deck width16 ft (4.8 m)
Roadway width14 ft (4.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (1999)
Projected traffic40 by 2018
Trucks0%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Lewiston Grade RD over E Branch Au Sable River built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2000.

What condition is Lewiston Grade RD over E Branch Au Sable River 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 October 2024.

How much traffic does Lewiston Grade RD over E Branch Au Sable River carry?

About 15 vehicles per day (1999 count).

How long is Lewiston Grade RD over E Branch Au Sable River?

The structure is 22 ft (6.7 m) long with a longest span of 22 ft (6.7 m) and a deck 16 ft wide.

Who owns Lewiston Grade RD over E Branch Au Sable River?

It is owned by the County Highway Agency.