US Bridges

SH 177 Ml over Little Dry Creek

Poor

Arapahoe County, Colorado · Greenwood Village · Structure no. F-17-AA

Built
1965
60 years old
Condition
Poor
inspected January 2025
Type
Tee Beam
Concrete
Length
71 ft
3 main spans
Daily traffic
29,000
2020 count
Owner
State
State Highway Agency

About this bridge

SH 177 Ml over Little Dry Creek is a concrete tee beam carrying SH 177 Ml over Little Dry Creek in Arapahoe County, Colorado. It was built in 1965, so it is 60 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 29,000 vehicles a day, roughly 2% of them trucks, projected to reach 29,580 by 2040. The structure is 71 ft (21.6 m) long and 79 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesSH 177 Ml
CrossesLittle Dry Creek
LocationGreenwood Village
RouteState Highway 177A
Coordinates39.62286, -104.95974
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53 US tons
Inventory rating32 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length71 ft (21.6 m)
Longest span23 ft (7 m)
Deck width79 ft (24.1 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,000 (2020)
Projected traffic29,580 by 2040
Trucks2%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

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 SH 177 Ml over Little Dry Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is SH 177 Ml over Little Dry Creek 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 2025.

How much traffic does SH 177 Ml over Little Dry Creek carry?

About 29,000 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is SH 177 Ml over Little Dry Creek?

The structure is 71 ft (21.6 m) long with a longest span of 23 ft (7 m) and a deck 79 ft wide.

Who owns SH 177 Ml over Little Dry Creek?

It is owned by the State Highway Agency.