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Structurally deficient and functionally obsolete bridges in Minneapolis

  • Blog Post by: James Eli Shiffer
  • August 6, 2012 - 5:19 PM

When the fifth anniversary of the collapse of the 35W bridge arrived last week, I wondered how many substandard bridges remained in the city. I put the question to Kevin Gutknecht, the communications staffer for the Minnesota Department of Transportation, and he gave me this list. He cautioned that the designations that became so familiar five years ago – structurally deficient, functionally obsolete, fracture-critical – do not mean a bridge is unsafe.

Still, the list does show how many bridges we cross each day that the state considers sub-par. Some of the big ones are already being replaced or repaired – the Lowry Avenue and Plymouth Avenue bridges over the Mississippi River and the Lyndale Avenue bridge over Minnehaha Creek among them. Others I would hate to see replaced, such as those charming old parkway bridges next to the lakes.

Bridge number Facility carried Feature crossed Owner Inspection agency County Deficiency status Fracture critical? Sufficiency rating
27728 I 94 NB on ramp GLENWOOD AVE & RR STATE METRO DISTRICT HENNEPIN ADEQ FC 98.5
27776F I-394R EB ramp I-94 WB ON RAMP STATE METRO DISTRICT HENNEPIN ADEQ FC 96.8
27776C I 394R WB I 394 WB ON RAMP STATE METRO DISTRICT HENNEPIN ADEQ FC 96.7
27966 GROVELAND AVE TH 94 STATE METRO DISTRICT HENNEPIN F.O. N 96
27776B I 394R EB I 394 & DOWNTOWN RAMPS STATE METRO DISTRICT HENNEPIN ADEQ FC 95.7
27874 TH 55 NB on ramp TH35W NB OFF RAMP STATE METRO DISTRICT HENNEPIN F.O. N 95.5
27873 TH 55 SB off ramp I 35W & NB OFF RAMP STATE METRO DISTRICT HENNEPIN F.O. N 95.3
27161 TH 55 EB off ramp TH 5 WB ON RAMP STATE METRO DISTRICT HENNEPIN F.O. N 95.1
27838 1st Ave S I 94 STATE METRO DISTRICT HENNEPIN F.O. N 95
27963 I 94 EB on ramp LYNDALE & HENN AVE & RMP STATE METRO DISTRICT HENNEPIN F.O. N 95
27776A I 394R I 394 WB, DUNWOODY BLVD STATE METRO DISTRICT HENNEPIN ADEQ FC 94.8
27726B I 94 SB off ramp LYNDALE AVE N & RR STATE METRO DISTRICT HENNEPIN F.O. FC 94.3
27793 I 94 NB off ramp I 94, RAMP & SB LYNDALE STATE METRO DISTRICT HENNEPIN F.O. N 94
9619 E 38th St I 35W STATE METRO DISTRICT HENNEPIN F.O. N 93.2
27816N US 952A NB RR & STREETS TO I 94 STATE METRO DISTRICT HENNEPIN F.O. N 93.1
27816S US 952A SB I 94 RAMP RR, STREETS STATE METRO DISTRICT HENNEPIN F.O. N 93.1
27169 TH 55 WB TH 5 EB OFF RAMP STATE METRO DISTRICT HENNEPIN F.O. N 92.7
9360 CSAH 122(WASH. AV) MISS. RIVER & STREETS COUNTY HENNEPIN COUNTY HENNEPIN ADEQ N 91.7
27989 Hennepin Ave I 35W STATE METRO DISTRICT HENNEPIN F.O. N 90
27A24 CSAH 37(4 ST SE) BNSF RR COUNTY HENNEPIN COUNTY HENNEPIN F.O. N 89.9
27A21 5th ST SE BNSF RR CITY CITY OF MINNEAPOLIS HENNEPIN F.O. N 89.7
27776D I 394R ramp LINDEN AVE/DUNWOODY BLVD STATE METRO DISTRICT HENNEPIN F.O. N 88.2
27756 Theodore Wirth Pkw I 394, I 394R & FRONT RD STATE METRO DISTRICT HENNEPIN F.O. N 88.1
27667 BURNHAM ROAD HCRRA CITY CITY OF MINNEAPOLIS HENNEPIN F.O. N 87.4
27727B I 94 SB on ramp GLENWOOD AVE STATE METRO DISTRICT HENNEPIN ADEQ FC 86.3
27799R I 94 EB on ramp LYNDALE AVENUE SB STATE METRO DISTRICT HENNEPIN ADEQ FC 85.8
L5730 MINNEHAHA PARKWAY MINNEHAHA CREEK OTHER CITY OF MINNEAPOLIS HENNEPIN F.O. N 85.1
27687 1st ST S CNW RY (ABANDONED) CITY CITY OF MINNEAPOLIS HENNEPIN ADEQ FC 83
27876A 6th Street / EB 94 I 35W , COLL RDS & RAMPS STATE METRO DISTRICT HENNEPIN F.O. N 83
27648 2nd AVE S MIDTOWN GREENWAY CITY CITY OF MINNEAPOLIS HENNEPIN F.O. N 80.6
27677 THEO WIRTH PARKWAY CP RAIL OTHER CITY OF MINNEAPOLIS HENNEPIN F.O. N 80.5
27192 MINNEHAHA PARKWAY MINNEHAHA CREEK OTHER CITY OF MINNEAPOLIS HENNEPIN F.O. N 80
27806 57th Ave I 94 STATE METRO DISTRICT HENNEPIN F.O. N 79.8
27725 LYNDALE AVE N (SB) BNSF RR CITY CITY OF MINNEAPOLIS HENNEPIN F.O. N 79.7
27703 11th St N I 394 STATE METRO DISTRICT HENNEPIN F.O. N 79.6
27729 LYNDALE AVE N (NB) BNSF RR CITY CITY OF MINNEAPOLIS HENNEPIN F.O. N 79.6
27715 Lyndale Ave NB I 94 & SB OFF RAMP STATE METRO DISTRICT HENNEPIN F.O. N 79.1
27100 11 ST S TH 65 STATE METRO DISTRICT HENNEPIN F.O. N 79
27A23 14TH AVE SE BNSF RR CITY CITY OF MINNEAPOLIS HENNEPIN F.O. N 78.8
27211 Chapel Road TH 5 WB ON RAMP STATE METRO DISTRICT HENNEPIN F.O. N 78.8
27702 12th St N I 394 STATE METRO DISTRICT HENNEPIN F.O. N 78.7
27678 THEO WIRTH PARKWAY BNSF RR OTHER CITY OF MINNEAPOLIS HENNEPIN F.O. N 78.5
9420 25TH Ave S I 94 STATE METRO DISTRICT HENNEPIN F.O. N 78
27525 Bloomington Ave TH 62 STATE METRO DISTRICT HENNEPIN F.O. N 78
27799L I 94 E Frontage Rd LYNDALE AVENUE NB STATE METRO DISTRICT HENNEPIN F.O. N 78
7269 Portland Ave TH 62 STATE METRO DISTRICT HENNEPIN F.O. N 78
9421 Riverside Ave I 94 STATE METRO DISTRICT HENNEPIN F.O. N 78
L9329 WEST LAKE HARRIET COMO-HARRIET STREETCAR CITY CITY OF MINNEAPOLIS HENNEPIN F.O. N 78
27855 I 94 TH 55 & RAMPS STATE METRO DISTRICT HENNEPIN F.O. N 77.6
9616 East 42nd St I 35W STATE METRO DISTRICT HENNEPIN F.O. N 77.5
9620 EB E 36th St I 35W STATE METRO DISTRICT HENNEPIN F.O. N 77.5
27A22 CSAH 36(UNIV AV) BNSF RR COUNTY HENNEPIN COUNTY HENNEPIN F.O. N 76.8
9621 WB E 35th St I 35W STATE METRO DISTRICT HENNEPIN F.O. N 76.8
27869 EB 28th St E I 35W STATE METRO DISTRICT HENNEPIN F.O. N 76.7
27870 WB 26th St E I 35W STATE METRO DISTRICT HENNEPIN F.O. N 76.7
7268 Penn Ave (CSAH 32) TH 62 STATE METRO DISTRICT HENNEPIN F.O. N 76.6
27840 15th St E TH 65 & RAMPS STATE METRO DISTRICT HENNEPIN F.O. N 76
27099 LYNDALE SB HENNEPIN NB CITY CITY OF MINNEAPOLIS HENNEPIN F.O. N 75.9
27882 UNIVERSITY AVE I 35W STATE METRO DISTRICT HENNEPIN F.O. N 75.8
27957 Franklin Ave I 94 STATE METRO DISTRICT HENNEPIN F.O. N 75.4
27865 20th Ave S I 94 STATE METRO DISTRICT HENNEPIN F.O. N 75.3
27636 HENNEPIN AVE MISS R; RIVER PKWY & ST COUNTY HENNEPIN COUNTY HENNEPIN ADEQ FC 74.8
27022 TH 62 EB TH 77 STATE METRO DISTRICT HENNEPIN F.O. N 74.2
27021 TH 62 WB TH 77 STATE METRO DISTRICT HENNEPIN F.O. N 74.2
27854 11 AVE I 35W, I 94 & WB ON RAMP STATE METRO DISTRICT HENNEPIN F.O. N 73.6
27872 E Franklin Ave I 35W & TH 65 STATE METRO DISTRICT HENNEPIN F.O. N 72.6
L5722 LAKE OF ISLES BLVD CHANNEL OTHER CITY OF MINNEAPOLIS HENNEPIN F.O. N 69.8
L8921 16th AVE S MIDTOWN GREENWAY COUNTY CITY OF MINNEAPOLIS HENNEPIN S.D. N 69.7
90591 NICOLLET AVE S MINNEHAHA PKWY & CREEK CITY CITY OF MINNEAPOLIS HENNEPIN F.O. N 68.4
27843 TH 65 I 94 STATE METRO DISTRICT HENNEPIN F.O. N 67.5
L5736 MINNEHAHA PARKWAY MINNEHAHA CREEK OTHER CITY OF MINNEAPOLIS HENNEPIN F.O. N 65.5
L5765 MINNEHAHA PARKWAY MINNEHAHA CREEK OTHER CITY OF MINNEAPOLIS HENNEPIN F.O. N 64.6
L5729 W LAKE ISLES PKWY CHANNEL TO CEDAR LK OTHER CITY OF MINNEAPOLIS HENNEPIN F.O. N 64.5
27842 I 94 WB on ramp I 94 & TH 65 STATE METRO DISTRICT HENNEPIN S.D. N 64.4
L8923 18th AVE S MIDTOWN GREENWAY COUNTY CITY OF MINNEAPOLIS HENNEPIN S.D. N 63.6
27853 Chicago Ave I 35W & I 94 STATE METRO DISTRICT HENNEPIN F.O. N 63.5
L8920 15th AVE S MIDTOWN GREENWAY COUNTY CITY OF MINNEAPOLIS HENNEPIN S.D. N 62.9
L9328 WILLIAM BERRY PKWY COMO-HARRIET STREETCAR OTHER CITY OF MINNEAPOLIS HENNEPIN F.O. N 62.6
L8910 STEVENS AVE SO MIDTOWN GREENWAY COUNTY CITY OF MINNEAPOLIS HENNEPIN S.D. N 59.8
93110 4TH ST N BASSETT CREEK CITY CITY OF MINNEAPOLIS HENNEPIN S.D. N 58
93108 10TH AVE N BASSETT CREEK CITY CITY OF MINNEAPOLIS HENNEPIN S.D. N 57.3
L5735 LAKE NOKOMIS PKWY MINNEHAHA CREEK OTHER CITY OF MINNEAPOLIS HENNEPIN F.O. N 54.5
90485 CSAH 23(MAIN NE) BNSF RR OTHER HENNEPIN COUNTY HENNEPIN S.D. N 49.9
2441 CSAH 5(FRANKLIN) W RIVER RD & MISS RIV COUNTY HENNEPIN COUNTY HENNEPIN S.D. N 47.6
L5731 MINNEHAHA PARKWAY MINNEHAHA CREEK OTHER CITY OF MINNEAPOLIS HENNEPIN F.O. N 47.5
5200 CSAH 81 CP RAIL COUNTY HENNEPIN COUNTY HENNEPIN S.D. N 46.9
27871 I 35W SB TH 65 NB STATE METRO DISTRICT HENNEPIN S.D. N 44.1
93111 3RD ST N BASSETT CREEK CITY CITY OF MINNEAPOLIS HENNEPIN S.D. N 42.7
90494 CSAH 35(PORTLAND) HCRRA OTHER HENNEPIN COUNTY HENNEPIN S.D. N 42.2
90437 CEDAR S (CSAH 152) HCRRA OTHER HENNEPIN COUNTY HENNEPIN S.D. N 40.9
91333 CSAH 152(WASH AVE) BASSETT CREEK TUNNEL COUNTY HENNEPIN COUNTY HENNEPIN S.D. N 39
92347 1st AVE S MIDTOWN GREENWAY COUNTY CITY OF MINNEAPOLIS HENNEPIN S.D. N 37.1
90590 1942(NICOLLET AV) MIDTOWN GREENWAY COUNTY CITY OF MINNEAPOLIS HENNEPIN S.D. N 36.1
90640 54 ST MINNEHAHA CREEK CITY CITY OF EDINA HENNEPIN S.D. N 30.8
L8901 FREMONT AV S MIDTOWN GREENWAY COUNTY CITY OF MINNEAPOLIS HENNEPIN S.D. N 29.6
90444 CSAH 22(LYNDALE) MINNEHAHA CREEK COUNTY HENNEPIN COUNTY HENNEPIN S.D. N 29.3
4559 MINNEHAHA AVE S MINNEHAHA CREEK OTHER CITY OF MINNEAPOLIS HENNEPIN S.D. N 25.8
L5893 W 29th ST OLD RR SPUR(ABAN) COUNTY CITY OF MINNEAPOLIS HENNEPIN S.D. N 24.1
2723 LOWRY AV (CSAH153) MISSISSIPPI RIVER COUNTY HENNEPIN COUNTY HENNEPIN S.D. FC 20
L9548 1st ST N BASSETT CREEK CITY CITY OF MINNEAPOLIS HENNEPIN S.D. N 19.2
27611 PLYMOUTH AVE MISSISSIPPI RIVER CITY CITY OF MINNEAPOLIS HENNEPIN S.D. N 18.4

MnDOT's definitions:

S.D. = Structually deficient: (MnDOT: "Bridges are classified as 'structurally deficient' if they have a general condition rating for the deck, superstructure, substructure or culvert as 4 or less or if the road approaches regularly overtop due to flooding. A general condition rating of 4 means that the component is rating is described as poor. Examples of poor condition include corrosion that has caused significant section loss of steel support members, movement of substructures, or advanced cracking and deterioration in concrete bridge decks. For bridge owners, the classification structurally deficient is a reminder that the bridge may need further analysis that may result in load posting, maintenance, rehabilitation, replacement or closure.")

F.O. = Functionally obsolete: (MnDOT: "A functionally obsolete bridge is one that was built to standards that do not meet the minimum federal clearance requirements for a new bridge. These bridges are not automatically rated as structurally deficient, nor are they inherently unsafe. Functionally obsolete bridges include those that have sub-standard geometric features such as narrow lanes, narrow shoulders, poor approach alignment or inadequate vertical under clearance.")

FC = Fracture critical: (MnDOT: "A fracture-critical bridge typically has a steel superstructure with load (tension) carrying members arranged in a manner in which if one fails, the bridge would collapse. Examples of fracture critical bridges are two girder bridges or truss bridges. The classification of fracture critical does not mean the bridge is inherently unsafe.")

Sufficiency rating (MnDOT: "The formula includes factors for structural condition, bridge geometry, and traffic considerations...  A bridge with a sufficiency rating of 80 or less is eligible for Federal rehabilitation funding. A bridge with a sufficiency rating of 50 or less is eligible for Federal replacement funding.")

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