US Bridges

Patterson RD over Lehman/Birk Ditch

Good

St. Joseph County, Indiana · 00.80 E of Dogwood RD · Structure no. 7100128

Built
2003
22 years old
Condition
Good
inspected September 2024
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
40
2018 count
Owner
County
County Highway Agency

About this bridge

Patterson RD over Lehman/Birk Ditch is a concrete culvert carrying Patterson RD over Lehman/Birk Ditch in St. Joseph County, Indiana. It was built in 2003, so it is 22 years old, younger than the Indiana average of 46.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 40 vehicles a day, roughly 6% of them trucks, projected to reach 49 by 2038. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesPatterson RD
CrossesLehman/Birk Ditch
Location00.80 E of Dogwood RD
RouteCounty Highway 0
StateIndiana
Coordinates41.525, -86.10325
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.9 US tons
Inventory rating35.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2018)
Projected traffic49 by 2038
Trucks6%
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 Patterson RD over Lehman/Birk Ditch built?

It was built in 2003, making it 22 years old in 2025.

What condition is Patterson RD over Lehman/Birk Ditch 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 September 2024.

How much traffic does Patterson RD over Lehman/Birk Ditch carry?

About 40 vehicles per day (2018 count), of which roughly 6% are trucks.

How long is Patterson RD over Lehman/Birk Ditch?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m).

Who owns Patterson RD over Lehman/Birk Ditch?

It is owned by the County Highway Agency.