US Bridges

Grass RD over Bauerdrain

Poor

Washtenaw County, Michigan · Saline Twp Sec 4 & 5 · Structure no. 000000000011046

Built
1961
64 years old, rebuilt 1988
Condition
Poor
inspected July 2024
Type
Slab
Wood or Timber
Length
30 ft
1 main span
Daily traffic
133
2003 count
Owner
County
County Highway Agency

About this bridge

Grass RD over Bauerdrain is a wood or timber slab carrying Grass RD over Bauerdrain in Washtenaw County, Michigan. It was built in 1961 and reconstructed in 1988, so it is 64 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 133 vehicles a day, projected to reach 230 by 2023. The structure is 30 ft (9.1 m) long and 21 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesGrass RD
CrossesBauerdrain
LocationSaline Twp Sec 4 & 5
RouteCounty Highway 0
Coordinates42.16221, -83.85577
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

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.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating67.1 US tons
Inventory rating47.2 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20 + Mod
Structure length30 ft (9.1 m)
Longest span30 ft (9.1 m)
Deck width21 ft (6.4 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic133 (2003)
Projected traffic230 by 2023
Trucks0%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$150,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Grass RD over Bauerdrain built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1988.

What condition is Grass RD over Bauerdrain in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does Grass RD over Bauerdrain carry?

About 133 vehicles per day (2003 count).

How long is Grass RD over Bauerdrain?

The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m) and a deck 21 ft wide.

Who owns Grass RD over Bauerdrain?

It is owned by the County Highway Agency.