US Bridges

30th ST over Nichols Creek

Good

Howard County, Iowa · 100112401 · Structure no. 000000000183551

Built
2020
5 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
71 ft
1 main span
Daily traffic
62
2022 count
Owner
County
County Highway Agency

About this bridge

30th ST over Nichols Creek is a steel stringer/multi-beam or girder carrying 30th ST over Nichols Creek in Howard County, Iowa. It was built in 2020, so it is 5 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 62 vehicles a day, projected to reach 62 by 2044. The structure is 71 ft (21.5 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries30th ST
CrossesNichols Creek
Location100112401
RouteCounty Highway 0
CountyHoward County
StateIowa
Coordinates43.47256, -92.0814
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating60.3 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length71 ft (21.5 m)
Longest span69 ft (20.9 m)
Deck width25 ft (7.6 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic62 (2022)
Projected traffic62 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 30th ST over Nichols Creek built?

It was built in 2020, making it 5 years old in 2025.

What condition is 30th ST over Nichols Creek 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 30th ST over Nichols Creek carry?

About 62 vehicles per day (2022 count).

How long is 30th ST over Nichols Creek?

The structure is 71 ft (21.5 m) long with a longest span of 69 ft (20.9 m) and a deck 25 ft wide.

Who owns 30th ST over Nichols Creek?

It is owned by the County Highway Agency.