US Bridges

270 TH over Greenbrier Creek

Fair

Greene County, Iowa · 083313201 · Structure no. 000000000162281

Built
1983
42 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
45
2022 count
Owner
County
County Highway Agency

About this bridge

270 TH over Greenbrier Creek is a concrete culvert carrying 270 TH over Greenbrier Creek in Greene County, Iowa. It was built in 1983, so it is 42 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 45 vehicles a day, projected to reach 45 by 2044. The structure is 23 ft (7 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries270 TH
CrossesGreenbrier Creek
Location083313201
RouteCounty Highway 0
CountyGreene County
StateIowa
Coordinates41.96491, -94.48626
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.4 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45 (2022)
Projected traffic45 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 270 TH over Greenbrier Creek built?

It was built in 1983, making it 42 years old in 2025.

What condition is 270 TH over Greenbrier Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2024.

How much traffic does 270 TH over Greenbrier Creek carry?

About 45 vehicles per day (2022 count).

How long is 270 TH over Greenbrier Creek?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m).

Who owns 270 TH over Greenbrier Creek?

It is owned by the County Highway Agency.