US Bridges

7th ST over Lateral #77 Dd #23

Fair

Carroll County, Iowa · 000000000 · Structure no. 000000000000980

Built
1900
125 years old
Condition
Fair
inspected October 2023
Type
Culvert
Concrete Continuous
Length
28 ft
2 main spans
Daily traffic
2,081
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

7th ST over Lateral #77 Dd #23 is a concrete continuous culvert carrying 7th ST over Lateral #77 Dd #23 in Carroll County, Iowa. It was built in 1900, so it is 125 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 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 2,081 vehicles a day, roughly 1% of them trucks, projected to reach 2,081 by 2043. The structure is 28 ft (8.5 m) long.

Location

Open in Google Maps
Carries7th ST
CrossesLateral #77 Dd #23
Location000000000
RouteCity Street 0
CountyCarroll County
StateIowa
Coordinates42.06483, -94.85951
Functional classUrban 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating65.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,081 (2022)
Projected traffic2,081 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$70,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 7th ST over Lateral #77 Dd #23 built?

It was built in 1900, making it 125 years old in 2025.

What condition is 7th ST over Lateral #77 Dd #23 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 2023.

How much traffic does 7th ST over Lateral #77 Dd #23 carry?

About 2,081 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is 7th ST over Lateral #77 Dd #23?

The structure is 28 ft (8.5 m) long with a longest span of 12 ft (3.7 m).

Who owns 7th ST over Lateral #77 Dd #23?

It is owned by the City or Municipal Highway Agency.