US Bridges

SH 105 Ml over Draw

Poor

Douglas County, Colorado · 2.7 Me S of JCT SH 67 · Structure no. G-17-AL

Built
1938
87 years old
Condition
Poor
inspected March 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
94 ft
4 main spans
Daily traffic
2,600
2020 count
Owner
State
State Highway Agency

About this bridge

SH 105 Ml over Draw is a wood or timber stringer/multi-beam or girder carrying SH 105 Ml over Draw in Douglas County, Colorado. It was built in 1938, so it is 87 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. Its operating status is: open, would be posted or closed except for temporary shoring.

It carries about 2,600 vehicles a day, roughly 5% of them trucks, projected to reach 3,406 by 2040. The structure is 94 ft (28.5 m) long and 26 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

CarriesSH 105 Ml
CrossesDraw
Location2.7 Me S of JCT SH 67
RouteState Highway 105B
Coordinates39.39421, -104.9499
Functional classRural Major 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.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 12 months
Operating statusOpen, would be posted or closed except for temporary shoring
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.8 US tons
Inventory rating26.6 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadH 15
Structure length94 ft (28.5 m)
Longest span23 ft (7 m)
Deck width26 ft (7.9 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,600 (2020)
Projected traffic3,406 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost$581,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 105 Ml over Draw built?

It was built in 1938, making it 87 years old in 2025.

What condition is SH 105 Ml over Draw 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 March 2024.

How much traffic does SH 105 Ml over Draw carry?

About 2,600 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is SH 105 Ml over Draw?

The structure is 94 ft (28.5 m) long with a longest span of 23 ft (7 m) and a deck 26 ft wide.

Who owns SH 105 Ml over Draw?

It is owned by the State Highway Agency.