BRIDGE # CSAH 4 over DES MOINES RIVERL - STBL - LOW RISK 0.2 MI S OF JCT CSAH 23 04 - CSAH 4 029+00.330 201.0 30.7 5630 sq. ft. / % sq. ft. / % N/A A - Open ft. ft. List: Postings:

2016 UNDERWATER

BRIDGE INSPECTION REPORT

BRIDGE #

DISTRICT: COUNTY: CITY/TOWNSHIP:

Date of Inspection:

Equipment Used:

Inspected By:

Report Written By:

Report Reviewed By:

Final Report Date:

32501

CSAH 4 over DES MOINES RIVER

District 7 Jackson PETERSBURG

06/16/2016

Forsyth, Roy

Roy Forsyth

County Highway AgencyOwner:

MinnesotaSTATE:

UNDERWATER SUMMARY 3

UNDERWATER INSPECTION 4

UNDERWATER INSPECTION PROCEDURES 6

STRUCTURE INVENTORY 7

ELEMENTS 8

PICTURES 11

DRAWINGS 13

TABLE OF CONTENTS

PAGE NUMBER

Contractor:

(A) Reinspect the submerged substructure units at the normal maximum recommended (NBIS) interval of sixty (60) months.

Collins Engineers, Inc.

9687Contractor Job Number:

RECOMMENDATIONS

REPORT SUMMARY

UNDERWATER INSPECTION

The substructure units inspected at Bridge No. 32501, Piers 1 and 2, were found to be generally in good condition with no defects of structural significance observed. The concrete was typically smooth and sound. Large rocks were observed around the perimeter of Pier 1 and appeared to be placed as a scour countermeasure. The channel bottom was generally sand with minimum penetration.

(A) The concrete of Piers 1 and 2 were smooth, sound, and in good condition.

(B) 12 inch diameter riprap was observed around the perimeter of Pier 1. The rocks extended away from the pier 4 to 5 feet.

(C) The channel bottom was sand with 6 inches of penetration on the north face of Pier 1.

INSPECTION FINDINGS

Page 3 of 14

WATERLINE DATUM4.

9.2

Water Level Reference:

90.3.Waterline Elevation (feet):

The top of the pier cap at the downstream end of Pier 1. Assumed Reference Elevation = 100.0

Substructure(s) Inspected:

SUBSTRUCTURE INSPECTION DATA3.

Piers 1 and 2

Maximum Water Depth at Substructure(s) Inspected (feet):

The piers consist of a rectangular shaft with rounded ends supporting a hammerhead cap.

General Shape:

Code:Item 61: Channel and Channel Protection:

7

7

Code:Item 62: Culvert:

5.

The waterline was approximately 9.7 feet below reference. Description:

NBIS CODING INFORMATION

Code:Item 60: Substructure:

(Minnesota specific codes are used for 92B and 113)

1.0 ft/s

District:

CSAH 4Facility Carried:

District 7

Bridge Description:

032 - JacksonCounty:

BRIDGE DATA1.


Bridge #:

DES MOINES RIVERFeature Intersected:

32501

Weather Conditions:

06/16/2016Date of Underwater Inspection:

Waterway Velocity (ft/sec):

0 ftUnderwater Visibility (feet):

INSPECTION DATA2.

The bridge structure consists of three spans of multiple steel beam superstructure. The superstructure is supported by two hammerhead shaped reinforced concrete piers and two reinforced concrete abutments. The piers are numbered 1 and 2 starting from the south end of the bridge. No design drawings were provided.

Professional Engineer/Team Leader:

Roy A. ForsythInspection Diver:

Roy A. Forsyth

Page 4 of 14

885 1EAScour 1

STRUCTURAL ELEMENT CONDITION RATING6.

No (Mark your selection with an X)

Item 113: Scour Critical Bridge: Code:

Y 48 06/2016Item 92B: Underwater Inspection: Code:

Yes X

L

Bridge is scour critical because abutment or pier foundation is rated as unstable due to observed scour at bridge site.

CS4CS3CS1 CS2

EA 22205 Reinforced Concrete Column

Conditions

Quantity UnitElement DescriptionELEM #

Page 5 of 14

The routine underwater inspection of Bridge 32501 (CSAH No. 4 Over the Des Moines River) was completed on June 16, 2016. The underwater inspection was conducted from shore. The inspection was conducted by a team consisting of a PE-Diver with a valid MnDOT Team leader certification, a backup diver and a dive tender. The inspection utilized commercial dive equipment and techniques (SSA and/or SCUBA) in accordance with OSHA regulations.Profiles were taken along the upstream and downstream faces of the bridge and around the periphery of substructure units to determine the presence, location and area of scour.

The bridge elements inspected consisted of 2 reinforced concrete pier walls. According to the bridge inventory or design drawings, Piers 1 and 2 were founded on pile footings. Inspection procedures followed FHWA guidance and the MnDOT Bridge and Structure Inspection Program Manual with channel bottom probing to search for bottom foundations. The routine underwater inspection frequency is recommended to remain at 60 months based on those findings and risk factors. Also, inspection procedures should continue to follow the above approach and standard guidance with 100% Level I and 10% Level II intensity efforts.

INSPECTION PROCEDURES


Page 6 of 14

Spec. Feat.Pier Foundation (Material/Type)

1 - CONCCantilever ID

+ W A T E R W A Y +Number of Spans Historic Status

3 - FTG PILE

Underwater Y 60Culvert Type 3 - FTG PILE

Pinned Asbly. N

06/16/2016

Barrel Length

201.0 ft. Navigation Control

Waterway Opening (sf.) 3325Structure Length

ft. Year Painted 1965

0 - No nav. control on waterwayDeck Width (Out-to-Out) 30.7

+ P A I N T +

APPR: 0 TOTAL:5 - Not eligible

MAIN: 3

Main Span Length 75.0 ft.Drainage Area (sq. mi.)

B R I D G E D A T A +Main Span Detail

0 - SUBSTANDARD+ M I S C.

Appr. Span Type Structure Flared

GR Termini 0 - SUBSTANDARD

Appr. Guardrail

Main Span Type 4 - Steel Continuous Median Width On Bridge

ft. Bridge Railing 0 - SUBSTANDARD

0 - SUBSTANDARD

Main Span Design 01 - Beam Span

ft. GR Transition

Skew 20 RIGHT

Y/N Freq Date

NAbutment Foundation (Material/Type)

1 - CONC Frac. Critical

2 - Riveted

D E P T H I N S P. +Appr. Span Design

0 - No flare+ I N

Appr. Span Detail Field Conn. ID

Parallel Structure N - No parallel structure

Pier Protection

0 - Not Required

Rating Date 02/01/20135630 sq. ft. Traffic

ft. 50B. Rt 1.00Sidewalk Width 50A. Lt 1.00

Roadway Area (Curb-to-Curb)

Posted Load 0 - Not Required

PostingStructure Area (Out-to-Out) 6171 sq. ft.

DBL:VEH: SEMI:

Rt 31 ARail Type Lt 31 C N - N/AN - N/A B N - N/A

0 - Not Required Overweight Permit CodesCurb Height Lt

ft. Horizontal 1 - Object Markers

0.67 ft. Vertical0.67 ft. Rt

Wear Surf Install Year

sq. ft. Nav. Vert. Lift Bridge Clear. (ft.)

L - STBL - LOW RISK

Year 1994Primer Type 0 - Other - non 3309 MN Scour Code

Painted Area

Unsound Paint % Nav. Clr. (ft.)Deck Material 1 - Concrete Cast-in-Place 0.0Wear Surf Type 6 - Bituminous

Vert. 0.0 Horiz.

S I G N S +Operating Rating 2 - HS TRUCK

0 - None + B R I D G E

Inventory Rating 2 - HS TRUCK 16.4

27.6Deck Rebars Install Year

Deck Rebars

Finish Type L - Other (Unknown)Wear Course/Fill Depth 0.10 ft.

0 - None

Design Load 4 - H 20

+ C A P A C I T Y R A T I N G S +Deck Membrane

43 31

Inspector Name Forsyth, Roy

Latitude Control Section (TH Only) Status' 34.70 ''

2 - 2-way traffic

Routine Inspection Frequency 24

Sect., Twp., Range

0.2 MI S OF JCT CSAH 23 Level of Service 1 - MAINLINE

- 34W Roadway Type28 - 101N

Detour Length 6.0 mi.R A T I N G S +

Custodian 02 - County Highway Agency

Owner 02 - County Highway AgencyDeck 7 Unsound

Deck %

C O N D I T I O N55 '

A - Open

Longitude 94 029+00.330 + N B I 9.00 '' Reference Point

Crew

+ I N S P E C T I O N +

Agency Br. No. 72

District 07

Bridge Match ID (TIS) 0 Userkey

CSAH 4 over DES MOINES RIVER

Minnesota Structure Inventory Report

Bridge ID: 32501

+ G E N E R A L + + R O A D W A Y +

Date: 07/25/2016

Sufficiency Rating 92.6Roadway Name or Description

4

City

Routine Inspection Date 09/25/2015

Desc. Loc.

Township 32014 - PETERSBURG CSAH 4

Number

NRoadway O/U Key Route On StructureMaint. Area Structurally Deficient

NRoute Sys 04 - CSAHCounty 032 - Jackson Functionally Obsolete

Lanes

Waterway Adequacy 9Max. Vert. Clear.

ft.Legislative District 22Bft.Potential ABC 2 - N/A ft.

ft.On - Off System Roadway Width 28.00 ft.

Vertical Clearance ft.1 - ON

Underclearances N

Service On 1 - Highway Appr. Surface Width+ S A F E T Y F E A T U R E S +

5 - Waterway Bridge Roadway Width 28.0

28.0 ft.

Service Under

ft.

ft. Approach Alignment 7Horizontal Clear.

ft.

ft.+ S T R U C T U R E + Lateral Clearance

HCADT ADTT6

Year Built 1965

MN Year Reconstructed Functional Class

%Channel 5

Substructure

0Superstructure 7

ON 2 UNDER

270 YEAR 2008BMU Agreement ADT

Structure Evaluation 6If Divided

D I M E N S I O N S +Bridge Plan Location 3 - COUNTY

Deck Geometry 6NB-EB SB-WBDate Opened to Traffic

+ R D W Y

FHWA Year Reconstructed

MN Temporary Status

07 - Rural - Major CollectorCulvert N

A P P R A I S A L R A T I N G S ++ N B I

Page 7 of 14

County:

City:

Township:

Township:Section: Range:

Span Type:

NBI Deck: Super: Sub: Chan: Culv:

Appraisal Ratings - Approach: Waterway:

Required Bridge Signs - Load Posting:

Horizntal:

Traffic:

Vertical:

MN Scour Code:

Open, Posted, Closed:

Location:

Route:

Control Section:

Local Agency Bridge Nbr.:

Ref. Pt.:

Maint. Area:

Length:

Deck Width:

Rdwy. Area/ Pct. Unsnd:

Paint Area/ Pct. Unsnd:

Culvert:

Jackson

32014 - PETERSBURG

101N28 34W

4 - Steel Continuous 2 -Stringer/Multi-beam or Girder

7 7 6 5 N

7 9

0 - Not Required

1 - Object Markers

0 - Not Required

0 - Not Required

L - STBL - LOW RISK

0.2 MI S OF JCT CSAH 23

04 - CSAH 4 029+00.330

201.0

30.7

5630 sq. ft. / %

sq. ft. / %

N/A

A - Open

ft.

ft.

Postings:List:

MINNESOTA BRIDGE INSPECTION REPORT

09/12/2016

Inspector: CO Bridge

BRIDGE 32501 CSAH 4 OVER DES MOINES RIVER

Unofficial Structurally Deficient N

NUnofficial Functionally Obsolete

Unofficial Sufficiency Rating 92.6

ELEMNBR ELEMENT NAME INSP. DATE QUANTITY

QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4REPORT TYPE

Reinforced Concrete Deck 06/16/2016 6171 SF 6171 0 0 012 Underwater

6171 SF 6171 0 0 0Migrated Values

Notes: 11/09/06 - A FEW MINOR CRACKS STILL EXIST AFTER DECK REHAB.CRACK SOUTH OF NORTH PIER, CENTER - 6' LONG, 1/4" WIDE, POSSIBLE DELAMINATION. 2006 (REPAIRED).10" x 15" x 1.5" deep spall with reinforcement exposed over north pier.Date 2003-02-11 - SOME CRACKING WITH EFFLORESCENCE AND AREAS OF SPALL. 2003OUTSIDE EDGES SHOWING SOME SPALL WITH SOME REBAR SHOWING. 20132 SPOTS OF DELAMINATION ON EAST EDGE @ CENTER OF DECK 2015

510 - Wearing Surfaces 5630 SF 5630 0 0 0

Notes: Low Slump Overlay with Uncoated Rebar Notes: DECK REHAB COMPLETED 2006.

Underwater 06/16/2016


Steel Open Girder/Beam 06/16/2016 804 LF 804 0 0 0107 Underwater

804 LF 804 0 0 0Migrated Values

Notes: 11/09/06 - BEAMS HAVE BEEN STRIPPED AND REPAINTED WHERE NEEDED.1/25/04 - Minor areas of rust at the top flange of outer beams, will be corrected with bridge rehab.Date 2003-02-11 - AREAS OF RUST AND SECTION LOSS CONTAINED TO BEAM ENDS WHERE MOST DAMAGE IS OCCURRING. 2003Date 2002-03-13 - AREAS OF RUST AND SECTION LOSS DUE TO BAD JOINT SEALS. 2002

515 - Steel Protective Coating 999 SF 999 0 0 0

Notes: [2016] Migrator assumed quantity of 999 SF and estimated the condition states.

Underwater 06/16/2016


Reinforced Concrete Column 06/16/2016 2 EA 2 0 0 0205 Underwater

2 EA 2 0 0 0Migrated Values

Reinforced Concrete Abutment 06/16/2016 109 LF 109 0 0 0215 Underwater


Notes: [2016] Migrator added 40 LF to abutment quantity to account for wingwalls (CS1:40 CS2:0 CS3:0 CS4:0).WEST END OF SOUTH ABUTMENT PARAPET HAS AREAS OF SPALL WITH 4 REBAR EXPOSED AND MINOR SECTION LOSS. 2007ABUTMENTS REPAIRED DURING BRIDGE REHAB 2006. Date 2003-02-11 - LARGE AREASOF CONCRETE SECTION LOSS WITH REINFORCEMENT EXPOSED, ESPECIALLY AT THE NORTH ABUTMENT. CONDITION ISCONTINUING TO DETERIORATE. 2003Date 2002-03-13 - SPALLING DUE TO BAD JOINT SEALS. (CONCRETE FLAKING) ATTENTION NEEDED TO PREVENT FURTHERDAMAGE TO ABUTMENTS, BEARINGS AND BEAMS. 2002

Reinforced Concrete Pier Cap 06/16/2016 69 LF 69 0 0 0234 Underwater


Page 8 of 14

Strip Seal Expansion Joint 06/16/2016 66 LF 66 0 0 0300 Underwater


Notes: JOINTS SHOULD BE CLEANED. 2007, 2011 CLEANED 2013NEW STRIP JOINTS 2006.

Movable Bearing 06/16/2016 12 EA 12 0 0 0311 Underwater


Notes: ABUTMENT BEARINGS WERE ALL REPLACED DURING BRIDGE REHAB 2006. ABUTMENTBEARINGS TO BE REPLACED WITH 2006 BRIDGE REHAB. 2006Date 2003-02-11 - ADVANCED CORROSION WITH A LOT OF SECTION LOSS, ESPECIALLY AT N. ABUT. BEARINGS ARE SEATEDIMPROPERLY WITH UNEVEN WEIGHT DISTRIBUTION. ALL MOVEABLE BEARINGS NEED TO BE REPLACED SOON. 2003Date 2002-03-13 - BEARINGS SUFFERING PACK RUST DUE TO BAD JOINT SEALS. 2002

Fixed Bearing 06/16/2016 4 EA 4 0 0 0313 Underwater


Reinforced Concrete Bridge Railing 06/16/2016 404 LF 404 0 0 0331 Underwater


Notes: 8"x10" TRIANGULAR SPALL AT NE END POST, 1'x9" TRIANGULAR SPALL AT SW END POST CURB. 2011

Critical Deficiencies or Safety Hazards 06/16/2016 1 EA 1 0 0 0800 Underwater


Notes: NO CRITICAL FINDINGS OBSERVED DURING THE LAST INSPECTION.

Bituminous Approach Roadway 06/16/2016 2 EA 2 0 0 0822 Underwater


Concrete Shear Cracking 06/16/2016 1 EA 1 0 0 0883 Underwater


Notes: Use this element to monitor the presence of shear cracking on concrete elements. Pay particular attention to the concrete pier caps.

Scour 06/16/2016 1 EA 1 0 0 0885 Underwater


Notes: SCOUR POSED RISK TO SOUTH PIER COLUMN, JCHD FILLED SCOUR HOLE WITH ROCK TO SHORE IT UP AND PREVENTFURTHER SCOUR, FALL OF 2011.

Other Bridge Signing 06/16/2016 1 EA 1 0 0 0891 Underwater


Notes: N.E. BRIDGE MARKER POST BROKEN. 2013N.E. BRIDGE MARKER REPAIRED. 2013

Slopes & Slope Protection 06/16/2016 1 EA 1 0 0 0892 Underwater


Deck & Approach Drainage 06/16/2016 1 EA 1 0 0 0894 Underwater


Notes: Use this element to rate the condition, function, and adequacy of the drainage system.

Protected Species 06/16/2016 1 EA 1 0 0 0900 Underwater


Notes: Use this element to track the presence of protected species living on this structure.

General Notes: SPRING CHANNEL INSPECTION OF SOUTH PIER IS NEEDED. 20061/26/05 - Spring inspection of channel around south pier is needed.Date 2004-01-13 - BRIDGE REHAB SCHEDULED FOR 2006, DECK REHAB, REPLACE EXPANSION BEARINGS,ABUTMENT REPAIR, SAND AND PAINT STEEL GIRDERS WHERE DAMAGED.SILT ISLAND BLOCKING SPAN #3, CORP. OF ENG. HAVE LOOKED AT THIS PROBLEM, NO DECISION ABOUTCLEANING ON INLET, S. BANK.1992. CHANNEL RESHAPED AND RIPRAP WAS PLACED ON INLET PORTION OFSTREAM 1994.


QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4


REPORT TYPE

Page 9 of 14


QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4


REPORT TYPEGeneral Notes:

Inspector's Signature Reviewer's Signature

Roy Forsyth

Inventory Notes:

1/26/05 - Spring inspection of channel around south pier is needed.Date 2004-01-13 - BRIDGE REHAB SCHEDULED FOR 2006, DECK REHAB, REPLACE EXPANSION BEARINGS,ABUTMENT REPAIR, SAND AND PAINT STEEL GIRDERS WHERE DAMAGED.SILT ISLAND BLOCKING SPAN #3, CORP. OF ENG. HAVE LOOKED AT THIS PROBLEM, NO DECISION ABOUTCLEANING ON INLET, S. BANK.1992. CHANNEL RESHAPED AND RIPRAP WAS PLACED ON INLET PORTION OFSTREAM 1994.

58. Deck NBI:

36A. Brdg Railings NBI:

36B. Transitions NBI:

36C. Appr Guardrail NBI:

36D. Appr GuardrailTerminal NBI:

59. Superstructure NBI:

60. Substructure NBI:

61. Channel NBI:

62. Culvert NBI:

71. Waterway Adeq NBI:

72. Appr RoadwayAlignment NBI:

Page 10 of 14

Photo 2 - View of South Abutment, looking south.

Photo 3 - View of North Abutment, looking north.

Pictures

Page 11 of 14

Pictures

Photo 4 - View of Pier 1, looking north.

Photo 5 - View of Pier 2, looking south.

Page 12 of 14

of 14

CoverTable of ContentsUnderwater SummaryUnderwater InspectionUnderwater Inspection ProceduresStructure InventoryElementsPicturesDrawings

Documents

BRIDGE # CSAH 4 over DES MOINES RIVERL - STBL - LOW RISK 0.2 MI S OF JCT CSAH 23 04 - CSAH 4 029+00.330 201.0 30.7 5630 sq. ft. / % sq. ft. / % N/A A - Open ft. ft. List: Postings: