US Bridges

170 TH / E26 over Drainage Ditch 110

Poor

Greene County, Iowa · 084300801 · Structure no. 000000000162490

Built
1963
62 years old
Condition
Poor
inspected June 2024
Type
Slab
Concrete
Length
32 ft
1 main span
Daily traffic
229
2022 count
Owner
County
County Highway Agency

About this bridge

170 TH / E26 over Drainage Ditch 110 is a concrete slab carrying 170 TH / E26 over Drainage Ditch 110 in Greene County, Iowa. It was built in 1963, so it is 62 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.

It carries about 229 vehicles a day, roughly 14% of them trucks, projected to reach 229 by 2044. The structure is 32 ft (9.8 m) long and 30 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
Carries170 TH / E26
CrossesDrainage Ditch 110
Location084300801
RouteCounty Highway 0
CountyGreene County
StateIowa
Coordinates42.10705, -94.3704
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.1 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length32 ft (9.8 m)
Longest span32 ft (9.8 m)
Deck width30 ft (9.1 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic229 (2022)
Projected traffic229 by 2044
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 170 TH / E26 over Drainage Ditch 110 built?

It was built in 1963, making it 62 years old in 2025.

What condition is 170 TH / E26 over Drainage Ditch 110 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 June 2024.

How much traffic does 170 TH / E26 over Drainage Ditch 110 carry?

About 229 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is 170 TH / E26 over Drainage Ditch 110?

The structure is 32 ft (9.8 m) long with a longest span of 32 ft (9.8 m) and a deck 30 ft wide.

Who owns 170 TH / E26 over Drainage Ditch 110?

It is owned by the County Highway Agency.