US Bridges

Grape RD over Dry Mill CR

Fair

Clayton County, Iowa · 093043003 · Structure no. 000000000119690

Built
1959
66 years old
Condition
Fair
inspected October 2024
Type
Slab
Concrete Continuous
Length
127 ft
3 main spans
Daily traffic
69
2022 count
Owner
County
County Highway Agency

About this bridge

Grape RD over Dry Mill CR is a concrete continuous slab carrying Grape RD over Dry Mill CR in Clayton County, Iowa. It was built in 1959, so it is 66 years old, older than the Iowa average of 45.5 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 69 vehicles a day, projected to reach 69 by 2044. The structure is 127 ft (38.7 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesGrape RD
CrossesDry Mill CR
Location093043003
RouteCounty Highway 0
CountyClayton County
StateIowa
Coordinates42.84868, -91.36254
Functional classRural Minor Collector

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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26.5 US tons
Inventory rating20.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length127 ft (38.7 m)
Longest span49 ft (14.9 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic69 (2022)
Projected traffic69 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Grape RD over Dry Mill CR built?

It was built in 1959, making it 66 years old in 2025.

What condition is Grape RD over Dry Mill CR 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 October 2024.

How much traffic does Grape RD over Dry Mill CR carry?

About 69 vehicles per day (2022 count).

How long is Grape RD over Dry Mill CR?

The structure is 127 ft (38.7 m) long with a longest span of 49 ft (14.9 m) and a deck 26 ft wide.

Who owns Grape RD over Dry Mill CR?

It is owned by the County Highway Agency.