US Bridges

FM over Outlet Green Valley Lk

PoorPosted for load

Union County, Iowa · 073312601 · Structure no. 000000000327040

Built
1951
74 years old
Condition
Poor
inspected October 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
38 ft
1 main span
Daily traffic
159
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Outlet Green Valley Lk is a steel stringer/multi-beam or girder carrying FM over Outlet Green Valley Lk in Union County, Iowa. It was built in 1951, so it is 74 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 159 vehicles a day, roughly 9% of them trucks, projected to reach 159 by 2043. The structure is 38 ft (11.6 m) long and 21 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesFM
CrossesOutlet Green Valley Lk
Location073312601
RouteCounty Highway 0
StateIowa
Coordinates41.09638, -94.38504
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2022
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating33.1 US tons
Inventory rating19.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length38 ft (11.6 m)
Longest span36 ft (11 m)
Deck width21 ft (6.5 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic159 (2022)
Projected traffic159 by 2043
Trucks9%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Outlet Green Valley Lk built?

It was built in 1951, making it 74 years old in 2025.

What condition is FM over Outlet Green Valley Lk in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2022.

How much traffic does FM over Outlet Green Valley Lk carry?

About 159 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is FM over Outlet Green Valley Lk?

The structure is 38 ft (11.6 m) long with a longest span of 36 ft (11 m) and a deck 21 ft wide.

Who owns FM over Outlet Green Valley Lk?

It is owned by the County Highway Agency.