US Bridges

County Road 43 over Mancos River

Poor

Montezuma County, Colorado · 01 MI N of SH 160 · Structure no. 83004300.10002

Built
1973
52 years old
Condition
Poor
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
95
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 43 over Mancos River is a steel stringer/multi-beam or girder carrying County Road 43 over Mancos River in Montezuma County, Colorado. It was built in 1973, so it is 52 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 95 vehicles a day, projected to reach 105 by 2042. The structure is 31 ft (9.3 m) long and 24 ft wide. If it were closed, the detour would be 100 mi (161 km).

Location

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CarriesCounty Road 43
CrossesMancos River
Location01 MI N of SH 160
RouteCounty Highway 0
CountyMontezuma County
StateColorado
Coordinates37.35361, -108.26167
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
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 rating34.2 US tons
Inventory rating20.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length31 ft (9.3 m)
Longest span29 ft (8.8 m)
Deck width24 ft (7.4 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic95 (2022)
Projected traffic105 by 2042
Trucks0%
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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$922,000 (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 43 over Mancos River built?

It was built in 1973, making it 52 years old in 2025.

What condition is County Road 43 over Mancos 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 November 2024.

How much traffic does County Road 43 over Mancos River carry?

About 95 vehicles per day (2022 count).

How long is County Road 43 over Mancos River?

The structure is 31 ft (9.3 m) long with a longest span of 29 ft (8.8 m) and a deck 24 ft wide.

Who owns County Road 43 over Mancos River?

It is owned by the County Highway Agency.