US Bridges

Field Street over Coon Creek

Fair

Jefferson County, Colorado · 0.5 MI S of Belleview Ave · Structure no. H-18-100

Built
1975
50 years old
Condition
Fair
inspected February 2025
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
21 ft
1 main span
Daily traffic
2,054
2021 count
Owner
County
County Highway Agency

About this bridge

Field Street over Coon Creek is a aluminum, wrought iron, or cast iron culvert carrying Field Street over Coon Creek in Jefferson County, Colorado. It was built in 1975, so it is 50 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 2,054 vehicles a day, roughly 2% of them trucks, projected to reach 2,362 by 2041. The structure is 21 ft (6.4 m) long and 115 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesField Street
CrossesCoon Creek
Location0.5 MI S of Belleview Ave
RouteCounty Highway 0
Coordinates39.61824, -105.09967
Functional classUrban 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
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating44.8 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width115 ft (35.1 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,054 (2021)
Projected traffic2,362 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Field Street over Coon Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is Field Street over Coon 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 Field Street over Coon Creek carry?

About 2,054 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is Field Street over Coon Creek?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m) and a deck 115 ft wide.

Who owns Field Street over Coon Creek?

It is owned by the County Highway Agency.