US Bridges

I 70 Frontage RD over Republican River SR

Fair

Kit Carson County, Colorado · 3.1 MI E. of Flagler · Structure no. G-24-T

Built
1972
53 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
198 ft
2 main spans
Daily traffic
33
2022 count
Owner
State
State Highway Agency

About this bridge

I 70 Frontage RD over Republican River SR is a prestressed concrete stringer/multi-beam or girder carrying I 70 Frontage RD over Republican River SR in Kit Carson County, Colorado. It was built in 1972, so it is 53 years old, older than the Colorado average of 42.2 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 33 vehicles a day, projected to reach 38 by 2042. The structure is 198 ft (60.5 m) long and 31 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI 70 Frontage RD
CrossesRepublican River SR
Location3.1 MI E. of Flagler
RouteInterstate 70A
CountyKit Carson County
StateColorado
Coordinates39.27421, -103.00664
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.9 US tons
Inventory rating43.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length198 ft (60.5 m)
Longest span95 ft (29 m)
Deck width31 ft (9.6 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33 (2022)
Projected traffic38 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 I 70 Frontage RD over Republican River SR built?

It was built in 1972, making it 53 years old in 2025.

What condition is I 70 Frontage RD over Republican River SR 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 November 2023.

How much traffic does I 70 Frontage RD over Republican River SR carry?

About 33 vehicles per day (2022 count).

How long is I 70 Frontage RD over Republican River SR?

The structure is 198 ft (60.5 m) long with a longest span of 95 ft (29 m) and a deck 31 ft wide.

Who owns I 70 Frontage RD over Republican River SR?

It is owned by the State Highway Agency.