US Bridges

D35 215th ST over Blackhawk Creek Branch

Good

Grundy County, Iowa · 088153403 · Structure no. 000000000164771

Built
2021
4 years old
Condition
Good
inspected April 2024
Type
Culvert
Concrete
Length
27 ft
2 main spans
Daily traffic
903
2022 count
Owner
County
County Highway Agency

About this bridge

D35 215th ST over Blackhawk Creek Branch is a concrete culvert carrying D35 215th ST over Blackhawk Creek Branch in Grundy County, Iowa. It was built in 2021, so it is 4 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 903 vehicles a day, projected to reach 903 by 2044. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesD35 215th ST
CrossesBlackhawk Creek Branch
Location088153403
RouteCounty Highway 0
CountyGrundy County
StateIowa
Coordinates42.3916, -92.58483
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.8 US tons
Inventory rating54.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length27 ft (8.2 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 traffic903 (2022)
Projected traffic903 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was D35 215th ST over Blackhawk Creek Branch built?

It was built in 2021, making it 4 years old in 2025.

What condition is D35 215th ST over Blackhawk Creek Branch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does D35 215th ST over Blackhawk Creek Branch carry?

About 903 vehicles per day (2022 count).

How long is D35 215th ST over Blackhawk Creek Branch?

The structure is 27 ft (8.2 m) long with a longest span of 12 ft (3.7 m).

Who owns D35 215th ST over Blackhawk Creek Branch?

It is owned by the County Highway Agency.