US 20 over MISS RIVER: HWY: RR (Route: 20)
Num:43000100000000x
Open: no restriction [A]
Built: 1943, Reconstructed: 1992
Historic: Bridge is on the NRHP. [1]

Google Streetview (If Available)

Rough Distance: 0 Miles (0 Kilometers)

Bridge Type
Main Span(s): Steel continuous [4] Arch - Thru [12]
Approach Span(s): Steel continuous [4] Girder and floorbeam system [03]
Deck: Concrete Cast-in-Place [1] with Wearing Surface:

Bridge Dimensions
Length: 1755.6 m = 5760.1 ft
Main Spans: 3 at 257.6 m = 845.2 ft
Approach Spans: 36
Skew: 0
Width, Roadway: 8.5 m = 27.9 ft (2 Lanes) and Out-To-Out: 9.3 m = 30.5 ft for a 8.5 m = 27.9 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 14.9 m = 48.9 ft

Location
Unknown [00000]: Jo Daviess County [085], Illinois [17]
Owned by State Highway Agency [01], DOT District: 2
IN DUBUQUE

Condition
Deck: Good [7]
Superstructure: Fair [5]
Substructure: Satisfactory [6]
Loading
Design: MS 18 / HS 20 [5]
Operating: 32.4 metric ton = 35.6 tons (Allowable Stress (AS) rating reported by rating factor (RF) method using MS18 loading [7])
Inventory: 32.4 metric ton = 35.6 tons (Allowable Stress (AS) rating reported by rating factor (RF) method using MS18 loading [7])

Appraisal
Structural: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck Geometry: Meets minimum tolerable limits to be left in place as is [4]
Road Alignment: Equal to present minimum criteria [6]
Waterway: Superior to present desirable criteria [9] and Countermeasures have been installed to mitigate an existing problem with scour. [7]
Inspections
Date: October 1999 [1099] and Frequency: 24

Future Work
Work Needed: Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Bridge Detour: 1.1 km = 0.7 mi
Traffic
ADT: 18100 (2019) and Trucks: 10%
Future ADT: 18600 (In 2040 )

SB US 61 & 151 over IA 946 & CITY STS & RR (Route: 61)
Num:606110x
Open: no restriction [A]
Built: 1990, Reconstructed: N/A [0000]
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0.4 Miles (0.7 Kilometers)

Bridge Type
Main Span(s): Prestressed concrete [5] Stringer/Multi-beam or girder [02]
Approach Span(s): Steel continuous [4] Stringer/Multi-beam or girder [02]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Monolithic Concrete (concurrently placed with structural deck) [1]

Bridge Dimensions
Length: 417.6 m = 1370.1 ft
Main Spans: 13 at 56.4 m = 185.0 ft
Approach Spans: 3
Skew: 0
Width, Roadway: 11.8 m = 38.7 ft (2 Lanes) and Out-To-Out: 12.2 m = 40.0 ft for a 11.3 m = 37.1 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A

Location
Unknown [02100]: Dubuque County [061], Iowa [19]
Owned by State Highway Agency [01], DOT District: 6
0.3 MI. S OF JCT. U.S. 20

Condition
Deck: Good [7]
Superstructure: Satisfactory [6]
Substructure: Good [7]
Loading
Design: MS 18 / HS 20 [5]
Operating: 64 metric ton = 70.4 tons (Allowable Stress(AS) [2])
Inventory: 37 metric ton = 40.7 tons (Allowable Stress(AS) [2])

Appraisal
Structural: Equal to present minimum criteria [6]
Deck Geometry: Better than present minimum criteria [7]
Road Alignment: Equal to present desirable criteria [8]
Waterway: N/A [N] and Bridge not over waterway. [N]
Inspections
Date: November 1999 [1199] and Frequency: 24

Future Work
Work Needed:
Bridge Detour: 0.2 km = 0.1 mi
Traffic
ADT: 5100 (2019) and Trucks: 20%
Future ADT: 5100 (In 2039 )

US 20 over MISS. RIVER: HWY & RR (Route: 20)
Num:23880x
Open: no restriction [A]
Built: 1943, Reconstructed: 1992
Historic: Bridge is on the NRHP. [1]

Google Streetview (If Available)

Rough Distance: 0.4 Miles (0.7 Kilometers)

Bridge Type
Main Span(s): Steel continuous [4] Arch - Thru [12]
Approach Span(s): Steel continuous [4] Girder and floorbeam system [03]
Deck: Concrete Cast-in-Place [1] with Wearing Surface:

Bridge Dimensions
Length: 1755.6 m = 5760.1 ft
Main Spans: 3 at 257.6 m = 845.2 ft
Approach Spans: 36
Skew: 0
Width, Roadway: 8.5 m = 27.9 ft (2 Lanes) and Out-To-Out: 9.3 m = 30.5 ft for a 8.5 m = 27.9 ft approaching roadway.
Vertical Clearance: 5.46 m = 17.9 ft and Navigational Clearance: 14.9 m = 48.9 ft

Location
Unknown [02100]: Dubuque County [061], Iowa [19]
Owned by State Highway Agency [01], DOT District: 6
IN DUBUQUE

Condition
Deck: Good [7]
Superstructure: Fair [5]
Substructure: Satisfactory [6]
Loading
Design: MS 18 / HS 20 [5]
Operating: 29.4 metric ton = 32.3 tons (No rating analysis or evaluation performed [5])
Inventory: 29.4 metric ton = 32.3 tons (No rating analysis or evaluation performed [5])

Appraisal
Structural: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck Geometry: Meets minimum tolerable limits to be left in place as is [4]
Road Alignment: Equal to present minimum criteria [6]
Waterway: Superior to present desirable criteria [9] and Countermeasures have been installed to mitigate an existing problem with scour. [7]
Inspections
Date: October 1999 [1099] and Frequency: 24

Future Work
Work Needed:
Bridge Detour: 1.1 km = 0.7 mi
Traffic
ADT: 17800 (2019) and Trucks: 6%
Future ADT: 17800 (In 2039 )