US Bridges

SH 30 ML/6th Ave over Tollgate Creek

Fair

Arapahoe County, Colorado · 0.2 MI E of I225 in Auror · Structure no. F-17-HF

Built
1978
47 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
180 ft
2 main spans
Daily traffic
30,000
2020 count
Owner
State
State Highway Agency

About this bridge

SH 30 ML/6th Ave over Tollgate Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying SH 30 ML/6th Ave over Tollgate Creek in Arapahoe County, Colorado. It was built in 1978, so it is 47 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 30,000 vehicles a day, roughly 3% of them trucks, projected to reach 33,900 by 2040. The structure is 180 ft (54.9 m) long and 87 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSH 30 ML/6th Ave
CrossesTollgate Creek
Location0.2 MI E of I225 in Auror
RouteState Highway 30A
CountyArapahoe County
StateColorado
Coordinates39.72549, -104.81849
Functional classUrban Other Principal Arterial

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 protection7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.5 US tons
Inventory rating26.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length180 ft (54.9 m)
Longest span89 ft (27 m)
Deck width87 ft (26.4 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,000 (2020)
Projected traffic33,900 by 2040
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 30 ML/6th Ave over Tollgate Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is SH 30 ML/6th Ave over Tollgate Creek 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 February 2025.

How much traffic does SH 30 ML/6th Ave over Tollgate Creek carry?

About 30,000 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is SH 30 ML/6th Ave over Tollgate Creek?

The structure is 180 ft (54.9 m) long with a longest span of 89 ft (27 m) and a deck 87 ft wide.

Who owns SH 30 ML/6th Ave over Tollgate Creek?

It is owned by the State Highway Agency.