US Bridges

X 17 over Monkey Creek & Imrl RR

Good

Louisa County, Iowa · 075052304 · Structure no. 000000000224751

Built
2008
17 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
306 ft
4 main spans
Daily traffic
540
2022 count
Owner
County
County Highway Agency

About this bridge

X 17 over Monkey Creek & Imrl RR is a prestressed concrete stringer/multi-beam or girder carrying X 17 over Monkey Creek & Imrl RR in Louisa County, Iowa. It was built in 2008, so it is 17 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 540 vehicles a day, roughly 23% of them trucks, projected to reach 540 by 2043. The structure is 306 ft (93.3 m) long and 33 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesX 17
CrossesMonkey Creek & Imrl RR
Location075052304
RouteCounty Highway 0
CountyLouisa County
StateIowa
Coordinates41.28545, -91.39714
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length306 ft (93.3 m)
Longest span87 ft (26.5 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic540 (2022)
Projected traffic540 by 2043
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed16.2 mi (26 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 X 17 over Monkey Creek & Imrl RR built?

It was built in 2008, making it 17 years old in 2025.

What condition is X 17 over Monkey Creek & Imrl RR 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 June 2023.

How much traffic does X 17 over Monkey Creek & Imrl RR carry?

About 540 vehicles per day (2022 count), of which roughly 23% are trucks.

How long is X 17 over Monkey Creek & Imrl RR?

The structure is 306 ft (93.3 m) long with a longest span of 87 ft (26.5 m) and a deck 33 ft wide.

Who owns X 17 over Monkey Creek & Imrl RR?

It is owned by the County Highway Agency.