US Bridges

Y44 (170th Ave) over Drainage Ditch 20

Good

Clinton County, Iowa · 082E22002 · Structure no. 000000000123241

Built
2012
13 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
53 ft
1 main span
Daily traffic
470
2022 count
Owner
County
County Highway Agency

About this bridge

Y44 (170th Ave) over Drainage Ditch 20 is a concrete stringer/multi-beam or girder carrying Y44 (170th Ave) over Drainage Ditch 20 in Clinton County, Iowa. It was built in 2012, so it is 13 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 470 vehicles a day, roughly 14% of them trucks, projected to reach 470 by 2044. The structure is 53 ft (16.2 m) long and 33 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesY44 (170th Ave)
CrossesDrainage Ditch 20
Location082E22002
RouteCounty Highway 0
StateIowa
Coordinates41.88927, -90.76229
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 48 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating53.2 US tons
Inventory rating41.1 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length53 ft (16.2 m)
Longest span50 ft (15.2 m)
Deck width33 ft (10.2 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic470 (2022)
Projected traffic470 by 2044
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Y44 (170th Ave) over Drainage Ditch 20 built?

It was built in 2012, making it 13 years old in 2025.

What condition is Y44 (170th Ave) over Drainage Ditch 20 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 March 2024.

How much traffic does Y44 (170th Ave) over Drainage Ditch 20 carry?

About 470 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is Y44 (170th Ave) over Drainage Ditch 20?

The structure is 53 ft (16.2 m) long with a longest span of 50 ft (15.2 m) and a deck 33 ft wide.

Who owns Y44 (170th Ave) over Drainage Ditch 20?

It is owned by the County Highway Agency.