US Bridges

Berm Access Road over Lake Argyle Splwy

Good

McDonough County, Illinois · W. CTR-6-T5NR3W · Structure no. 055990000000000

Built
1958
67 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
90 ft
2 main spans
Daily traffic
50
2021 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

Berm Access Road over Lake Argyle Splwy is a steel continuous stringer/multi-beam or girder carrying Berm Access Road over Lake Argyle Splwy in McDonough County, Illinois. It was built in 1958, so it is 67 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 50 vehicles a day, roughly 2% of them trucks, projected to reach 51 by 2046. The structure is 90 ft (27.4 m) long and 20 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesBerm Access Road
CrossesLake Argyle Splwy
LocationW. CTR-6-T5NR3W
CountyMcDonough County
StateIllinois
Coordinates40.44921, -90.78695
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36.8 US tons
Inventory rating23.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length90 ft (27.4 m)
Longest span43 ft (13.1 m)
Deck width20 ft (6.1 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2021)
Projected traffic51 by 2046
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Park, Forest, or Reservation Agency
Maintained byState Park, Forest, or Reservation Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$284,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Berm Access Road over Lake Argyle Splwy built?

It was built in 1958, making it 67 years old in 2025.

What condition is Berm Access Road over Lake Argyle Splwy in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.

How much traffic does Berm Access Road over Lake Argyle Splwy carry?

About 50 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is Berm Access Road over Lake Argyle Splwy?

The structure is 90 ft (27.4 m) long with a longest span of 43 ft (13.1 m) and a deck 20 ft wide.

Who owns Berm Access Road over Lake Argyle Splwy?

It is owned by the State Park, Forest, or Reservation Agency.