US Bridges

Columbia ST over Delta Lake

PoorPosted for load

Allen County, Indiana · 00.10 W of Delta Blvd · Structure no. 0200266

Built
1939
86 years old
Condition
Poor
inspected May 2024
Type
Culvert
Concrete
Length
25 ft
1 main span
Daily traffic
10,025
2024 count
Owner
County
County Highway Agency

About this bridge

Columbia ST over Delta Lake is a concrete culvert carrying Columbia ST over Delta Lake in Allen County, Indiana. It was built in 1939, so it is 86 years old, older than the Indiana average of 46.6 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. Its operating status is: posted for load restriction.

It carries about 10,025 vehicles a day, roughly 5% of them trucks, projected to reach 15,000 by 2044. The structure is 25 ft (7.6 m) long and 54 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesColumbia ST
CrossesDelta Lake
Location00.10 W of Delta Blvd
RouteCity Street 0
CountyAllen County
StateIndiana
Coordinates41.08705, -85.12132
Functional classUrban Minor Arterial

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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.5 US tons
Inventory rating32.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span20 ft (6.1 m)
Deck width54 ft (16.4 m)
Roadway width34 ft (10.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,025 (2024)
Projected traffic15,000 by 2044
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 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$1.6 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Columbia ST over Delta Lake built?

It was built in 1939, making it 86 years old in 2025.

What condition is Columbia ST over Delta Lake 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 May 2024.

How much traffic does Columbia ST over Delta Lake carry?

About 10,025 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Columbia ST over Delta Lake?

The structure is 25 ft (7.6 m) long with a longest span of 20 ft (6.1 m) and a deck 54 ft wide.

Who owns Columbia ST over Delta Lake?

It is owned by the County Highway Agency.