US Bridges

160th Avenue over Seep Canal

Poor

Adams County, Colorado · 0.6 Mile East of I-76 · Structure no. ADA160-17.5N077

Built
1960
65 years old, rebuilt 1996
Condition
Poor
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
36 ft
1 main span
Daily traffic
1,539
2021 count
Owner
County
County Highway Agency

About this bridge

160th Avenue over Seep Canal is a steel stringer/multi-beam or girder carrying 160th Avenue over Seep Canal in Adams County, Colorado. It was built in 1960 and reconstructed in 1996, so it is 65 years old, older than the Colorado average of 42.2 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 1,539 vehicles a day, roughly 4% of them trucks, projected to reach 2,000 by 2041. The structure is 36 ft (11 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Carries160th Avenue
CrossesSeep Canal
Location0.6 Mile East of I-76
RouteCounty Highway 0
Coordinates39.98466, -104.72197
Functional classRural Local

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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.6 US tons
Inventory rating23.7 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span33 ft (10 m)
Deck width30 ft (9.1 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,539 (2021)
Projected traffic2,000 by 2041
Trucks4%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 160th Avenue over Seep Canal built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1996.

What condition is 160th Avenue over Seep Canal 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 December 2023.

How much traffic does 160th Avenue over Seep Canal carry?

About 1,539 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is 160th Avenue over Seep Canal?

The structure is 36 ft (11 m) long with a longest span of 33 ft (10 m) and a deck 30 ft wide.

Who owns 160th Avenue over Seep Canal?

It is owned by the County Highway Agency.