US Bridges

CR 750S over Big Walnut Creek

PoorPosted for load

Putnam County, Indiana · 00.30 W of US 40 · Structure no. 6700229

Built
1923
102 years old
Condition
Poor
inspected March 2024
Type
Arch - Deck
Concrete
Length
235 ft
3 main spans
Daily traffic
100
2023 count
Owner
County
County Highway Agency

About this bridge

CR 750S over Big Walnut Creek is a concrete arch - deck carrying CR 750S over Big Walnut Creek in Putnam County, Indiana. It was built in 1923, so it is 102 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 100 vehicles a day, roughly 5% of them trucks, projected to reach 140 by 2043. The structure is 235 ft (71.6 m) long and 23 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesCR 750S
CrossesBig Walnut Creek
Location00.30 W of US 40
RouteCounty Highway 310
StateIndiana
Coordinates39.5517, -86.9811
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating7.9 US tons
Inventory rating7.9 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length235 ft (71.6 m)
Longest span72 ft (21.9 m)
Deck width23 ft (7 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic140 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 statusEligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$318,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 750S over Big Walnut Creek built?

It was built in 1923, making it 102 years old in 2025.

What condition is CR 750S over Big Walnut Creek 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 March 2024.

How much traffic does CR 750S over Big Walnut Creek carry?

About 100 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is CR 750S over Big Walnut Creek?

The structure is 235 ft (71.6 m) long with a longest span of 72 ft (21.9 m) and a deck 23 ft wide.

Who owns CR 750S over Big Walnut Creek?

It is owned by the County Highway Agency.