US Bridges

Schaffer Road over Purdy Marsh

Fair

Knox County, Indiana · 00.73 E of Memering Road · Structure no. 4200155

Built
1991
34 years old
Condition
Fair
inspected September 2023
Type
Other
Steel
Length
73 ft
1 main span
Daily traffic
130
2015 count
Owner
County
County Highway Agency

About this bridge

Schaffer Road over Purdy Marsh is a steel other carrying Schaffer Road over Purdy Marsh in Knox County, Indiana. It was built in 1991, so it is 34 years old, younger than the Indiana average of 46.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 130 vehicles a day, roughly 3% of them trucks, projected to reach 170 by 2035. The structure is 73 ft (22.4 m) long and 20 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

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CarriesSchaffer Road
CrossesPurdy Marsh
Location00.73 E of Memering Road
RouteCounty Highway 0
CountyKnox County
StateIndiana
Coordinates38.77272, -87.27314
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45 US tons
Inventory rating35.9 US tons

Structure

Structure typeOther
MaterialSteel
DeckSteel plate
Main spans1
Design loadUnknown
Structure length73 ft (22.4 m)
Longest span57 ft (17.3 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic130 (2015)
Projected traffic170 by 2035
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 Schaffer Road over Purdy Marsh built?

It was built in 1991, making it 34 years old in 2025.

What condition is Schaffer Road over Purdy Marsh 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 September 2023.

How much traffic does Schaffer Road over Purdy Marsh carry?

About 130 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is Schaffer Road over Purdy Marsh?

The structure is 73 ft (22.4 m) long with a longest span of 57 ft (17.3 m) and a deck 20 ft wide.

Who owns Schaffer Road over Purdy Marsh?

It is owned by the County Highway Agency.