US Bridges

I 70 Strasburg Spu over UP RR

Poor

Arapahoe County, Colorado · 0.15 MI N of JCT I 70 Ml · Structure no. F-19-AJ

Built
1962
63 years old
Condition
Poor
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
142 ft
3 main spans
Daily traffic
4,400
2020 count
Owner
State
State Highway Agency

About this bridge

I 70 Strasburg Spu over UP RR is a steel continuous stringer/multi-beam or girder carrying I 70 Strasburg Spu over UP RR in Arapahoe County, Colorado. It was built in 1962, so it is 63 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 4,400 vehicles a day, roughly 4% of them trucks, projected to reach 6,204 by 2040. The structure is 142 ft (43.3 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesI 70 Strasburg Spu
CrossesUP RR
Location0.15 MI N of JCT I 70 Ml
RouteState Highway 70M
CountyArapahoe County
StateColorado
Coordinates39.73643, -104.32633
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
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
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.7 US tons
Inventory rating30.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length142 ft (43.3 m)
Longest span52 ft (16 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,400 (2020)
Projected traffic6,204 by 2040
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck replacement with only incidental widening
Estimated improvement cost$245,000
NavigationNo navigation control on waterway

Frequently asked questions

When was I 70 Strasburg Spu over UP RR built?

It was built in 1962, making it 63 years old in 2025.

What condition is I 70 Strasburg Spu over UP RR 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 April 2023.

How much traffic does I 70 Strasburg Spu over UP RR carry?

About 4,400 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is I 70 Strasburg Spu over UP RR?

The structure is 142 ft (43.3 m) long with a longest span of 52 ft (16 m) and a deck 32 ft wide.

Who owns I 70 Strasburg Spu over UP RR?

It is owned by the State Highway Agency.