US Bridges

Glenwood Drive over Two Mile Creek

Fair

Boulder County, Colorado · 400 Ft W of State HWY 36 · Structure no. BOLD-38-GLENWDR

Built
1972
53 years old
Condition
Fair
inspected February 2025
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
3,439
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Glenwood Drive over Two Mile Creek is a concrete culvert carrying Glenwood Drive over Two Mile Creek in Boulder County, Colorado. It was built in 1972, so it is 53 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 3,439 vehicles a day, roughly 4% of them trucks, projected to reach 4,127 by 2042. The structure is 26 ft (7.8 m) long and 68 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesGlenwood Drive
CrossesTwo Mile Creek
Location400 Ft W of State HWY 36
RouteCity Street 0
Coordinates40.03273, -105.26033
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 protection7 GoodSome minor problems.
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 geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length26 ft (7.8 m)
Longest span12 ft (3.7 m)
Deck width68 ft (20.6 m)
Roadway width66 ft (20.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,439 (2023)
Projected traffic4,127 by 2042
Trucks4%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Glenwood Drive over Two Mile Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is Glenwood Drive over Two Mile 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 Glenwood Drive over Two Mile Creek carry?

About 3,439 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Glenwood Drive over Two Mile Creek?

The structure is 26 ft (7.8 m) long with a longest span of 12 ft (3.7 m) and a deck 68 ft wide.

Who owns Glenwood Drive over Two Mile Creek?

It is owned by the City or Municipal Highway Agency.