US Bridges

Baseline Rd/Ms 199 over Rob Roy Creek

Poor

Kendall County, Illinois · 0.01 MI W OFRT47 · Structure no. 045304400000000

Built
1966
59 years old
Condition
Poor
inspected August 2024
Type
Slab
Concrete
Length
30 ft
1 main span
Daily traffic
2,600
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Baseline Rd/Ms 199 over Rob Roy Creek is a concrete slab carrying Baseline Rd/Ms 199 over Rob Roy Creek in Kendall County, Illinois. It was built in 1966, so it is 59 years old, older than the Illinois average of 45.3 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 2,600 vehicles a day, roughly 5% of them trucks, projected to reach 1,586 by 2046. The structure is 30 ft (9.1 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesBaseline Rd/Ms 199
CrossesRob Roy Creek
Location0.01 MI W OFRT47
RouteCity Street 0
Coordinates41.72179, -88.44402
Functional classUrban Local

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.1 US tons
Inventory rating31.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width27 ft (8.1 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,600 (2024)
Projected traffic1,586 by 2046
Trucks5%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway 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$123,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Baseline Rd/Ms 199 over Rob Roy Creek built?

It was built in 1966, making it 59 years old in 2025.

What condition is Baseline Rd/Ms 199 over Rob Roy Creek 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 August 2024.

How much traffic does Baseline Rd/Ms 199 over Rob Roy Creek carry?

About 2,600 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Baseline Rd/Ms 199 over Rob Roy Creek?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 27 ft wide.

Who owns Baseline Rd/Ms 199 over Rob Roy Creek?

It is owned by the City or Municipal Highway Agency.