US Bridges

88th Avenue over South Platte River

Poor

Adams County, Colorado · 1.36 MI W of I-76 · Structure no. THN-088CLD-PLR

Built
1960
65 years old
Condition
Poor
inspected January 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
230 ft
4 main spans
Daily traffic
25,590
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

88th Avenue over South Platte River is a prestressed concrete box beam or girders - single or spread carrying 88th Avenue over South Platte River in Adams County, Colorado. It was built in 1960, 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 25,590 vehicles a day, roughly 5% of them trucks, projected to reach 33,267 by 2041. The structure is 230 ft (70 m) long and 67 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries88th Avenue
CrossesSouth Platte River
Location1.36 MI W of I-76
RouteCity Street 0
Coordinates39.85609, -104.93794
Functional classUrban Other Principal Arterial

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 inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length230 ft (70 m)
Longest span55 ft (16.8 m)
Deck width67 ft (20.3 m)
Roadway width52 ft (16 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,590 (2021)
Projected traffic33,267 by 2041
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 88th Avenue over South Platte River built?

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

What condition is 88th Avenue over South Platte River 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 January 2024.

How much traffic does 88th Avenue over South Platte River carry?

About 25,590 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is 88th Avenue over South Platte River?

The structure is 230 ft (70 m) long with a longest span of 55 ft (16.8 m) and a deck 67 ft wide.

Who owns 88th Avenue over South Platte River?

It is owned by the City or Municipal Highway Agency.