US Bridges

City ST - Maple over San Miguel River

Fair

San Miguel County, Colorado · 50 Ft S of SH145 · Structure no. TELLRD-MAPLE

Built
2001
24 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
45 ft
1 main span
Daily traffic
685
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

City ST - Maple over San Miguel River is a steel stringer/multi-beam or girder carrying City ST - Maple over San Miguel River in San Miguel County, Colorado. It was built in 2001, so it is 24 years old, younger 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 685 vehicles a day, roughly 5% of them trucks, projected to reach 780 by 2042. The structure is 45 ft (13.6 m) long and 24 ft wide. If it were closed, the detour would be 100 mi (161 km).

Location

Open in Google Maps
CarriesCity ST - Maple
CrossesSan Miguel River
Location50 Ft S of SH145
RouteCity Street 0
CountySan Miguel County
StateColorado
Coordinates37.93591, -107.80692
Functional classRural Major Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating68.1 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length45 ft (13.6 m)
Longest span41 ft (12.6 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic685 (2022)
Projected traffic780 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed100 mi (161 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$265,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was City ST - Maple over San Miguel River built?

It was built in 2001, making it 24 years old in 2025.

What condition is City ST - Maple over San Miguel River 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 June 2024.

How much traffic does City ST - Maple over San Miguel River carry?

About 685 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is City ST - Maple over San Miguel River?

The structure is 45 ft (13.6 m) long with a longest span of 41 ft (12.6 m) and a deck 24 ft wide.

Who owns City ST - Maple over San Miguel River?

It is owned by the Town or Township Highway Agency.