US Bridges

CR 17 (n Shields S over Terry Lake Inlet Canal

Poor

Larimer County, Colorado · 0.5 MI N of US HWY 287 · Structure no. LR17-0.5-S287

Built
1962
63 years old
Condition
Poor
inspected March 2025
Type
Tee Beam
Concrete
Length
23 ft
1 main span
Daily traffic
4,595
2023 count
Owner
County
County Highway Agency

About this bridge

CR 17 (n Shields S over Terry Lake Inlet Canal is a concrete tee beam carrying CR 17 (n Shields S over Terry Lake Inlet Canal in Larimer County, Colorado. It was built in 1962, so it is 63 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 4,595 vehicles a day, roughly 16% of them trucks, projected to reach 5,743 by 2043. The structure is 23 ft (7 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCR 17 (n Shields S
CrossesTerry Lake Inlet Canal
Location0.5 MI N of US HWY 287
RouteCounty Highway 0
CountyLarimer County
StateColorado
Coordinates40.63297, -105.09522
Functional classUrban Minor 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
Deck8 Very GoodNo problems noted.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.2 US tons
Inventory rating25.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckOther
Main spans1
Design loadUnknown
Structure length23 ft (7 m)
Longest span20 ft (6.1 m)
Deck width30 ft (9.2 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,595 (2023)
Projected traffic5,743 by 2043
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 17 (n Shields S over Terry Lake Inlet Canal built?

It was built in 1962, making it 63 years old in 2025.

What condition is CR 17 (n Shields S over Terry Lake Inlet Canal 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 2025.

How much traffic does CR 17 (n Shields S over Terry Lake Inlet Canal carry?

About 4,595 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is CR 17 (n Shields S over Terry Lake Inlet Canal?

The structure is 23 ft (7 m) long with a longest span of 20 ft (6.1 m) and a deck 30 ft wide.

Who owns CR 17 (n Shields S over Terry Lake Inlet Canal?

It is owned by the County Highway Agency.