US Bridges

Ash RD over Grimes Ditch

Fair

St. Joseph County, Indiana · 00.60 N of New RD · Structure no. 7100004

Built
1975
50 years old, rebuilt 2020
Condition
Fair
inspected September 2024
Type
Slab
Wood or Timber
Length
52 ft
2 main spans
Daily traffic
26
2018 count
Owner
County
County Highway Agency

About this bridge

Ash RD over Grimes Ditch is a wood or timber slab carrying Ash RD over Grimes Ditch in St. Joseph County, Indiana. It was built in 1975 and reconstructed in 2020, so it is 50 years old, older 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 5 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 26 vehicles a day, roughly 15% of them trucks, projected to reach 32 by 2038. The structure is 52 ft (15.8 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesAsh RD
CrossesGrimes Ditch
Location00.60 N of New RD
RouteCounty Highway 0
CountySt. Joseph County
StateIndiana
Coordinates41.57422, -86.06042
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
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.5 US tons
Inventory rating40.1 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadH 20
Structure length52 ft (15.8 m)
Longest span25 ft (7.7 m)
Deck width29 ft (8.9 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2018)
Projected traffic32 by 2038
Trucks15%
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$42,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Ash RD over Grimes Ditch built?

It was built in 1975, making it 50 years old in 2025. It was reconstructed in 2020.

What condition is Ash RD over Grimes Ditch 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 2024.

How much traffic does Ash RD over Grimes Ditch carry?

About 26 vehicles per day (2018 count), of which roughly 15% are trucks.

How long is Ash RD over Grimes Ditch?

The structure is 52 ft (15.8 m) long with a longest span of 25 ft (7.7 m) and a deck 29 ft wide.

Who owns Ash RD over Grimes Ditch?

It is owned by the County Highway Agency.