2016 UNDERWATER BRIDGE INSPECTION REPORT. CSAH 20 over POMME DE TERRE RIVER. Date of Inspection: Equipment Used: 06/18/2016. County Highway Agency

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1 2016 UNDERWATER BRIDGE INSPECTION REPORT BRIDGE # CSAH 20 over POMME DE TERRE RIVER DISTRICT: District 4 COUNTY: Swift CITY/TOWNSHIP: FAIRFIELD STATE: Minnesota Date of Inspection: Equipment Used: 06/18/2016 Owner: County Highway Agency Inspected By: Forsyth, Roy Report Written By: Roy Forsyth Report Reviewed By: Final Report Date:

2 TABLE OF CONTENTS PAGE NUMBER UNDERWATER SUMMARY 3 UNDERWATER INSPECTION 4 UNDERWATER INSPECTION PROCEDURES 6 STRUCTURE INVENTORY 7 ELEMENTS 8 PICTURES 11 DRAWINGS 14

3 UNDERWATER INSPECTION REPORT SUMMARY The substructure units inspected at Bridge No , Piers 1 and 2, were found to be generally in good condition below water with no defects of structural significance observed. All of the steel piles had 100 percent loss of paint coating from 2 foot above the water line to channel bottom. The channel bottom material typically consisted of sand with 6 inches of probe rod penetration. INSPECTION FINDINGS (A) All of the steel piles had 100 percent loss of paint coating from 2 foot above the water line to channel bottom. The coating was in tact from 2 foot above the water line to the cap. (B) The channel bottom material typically consisted of sand with 6 inches of probe rod penetration. RECOMMENDATIONS (A) Reinspect the submerged substructure units at the normal maximum recommended (NBIS) interval of sixty (60) months. Contractor: Contractor Job Number: Collins Engineers, Inc Page 3 of 15

4 UNDERWATER INSPECTION 1. BRIDGE DATA Bridge #: Feature Intersected: Facility Carried: District: County: POMME DE TERRE RIVER CSAH 20 District Swift Bridge Description: The bridge consisted of 3 mains spans of precast concrete double tees spans that supported a precast concrete panel deck. The substructure was 2 reinforced concrete abutments founded on footing piles and 2 bents of steel CIP piles. The bents were labeled the West and East Bents from west to east respectively. 2. INSPECTION DATA Professional Engineer/Team Leader: Inspection Diver: Date of Underwater Inspection: Weather Conditions: Underwater Visibility (feet): Waterway Velocity (ft/sec): Roy A. Forsyth Marc Stern 06/18/2016 Sunny, 75 F 0.5 ft None/Negligible 3. SUBSTRUCTURE INSPECTION DATA Substructure(s) Inspected: West and East Bents General Shape: Each bent consists of a reinforced concrete cap supported by 5 steel CIP piles. Maximum Water Depth at Substructure(s) Inspected (feet): WATERLINE DATUM Water Level Reference: Waterline Elevation (feet): Description: Top of cap at the downstream nose of West Bent The waterline was approximately 8.1 feet below the reference. 5. NBIS CODING INFORMATION (Minnesota specific codes are used for 92B and 113) Item 60: Substructure: Item 61: Channel and Channel Protection: Item 62: Culvert: Item 92B: Underwater Inspection: Code: Code: Code: Code: 7 6 Y 48 06/2016 Page 4 of 15

5 Item 113: Scour Critical Bridge: Code: I Bridge is scour critical because abutment or pier foundation is rated as unstable due to observed scour at bridge site. Yes X No (Mark your selection with an X) 6. STRUCTURAL ELEMENT CONDITION RATING Conditions ELEM # Element Description Quantity Unit CS1 CS2 CS3 CS4 225 Steel or CIP Piling 10 EA Scour 1 EA 1 Page 5 of 15

6 UNDERWATER INSPECTION INSPECTION PROCEDURES The routine underwater inspection of Bridge (CSAH 20 over the Pomme De Terre River) was completed on June, 18, 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. Due to waterway conditions at the time of inspection, the inspection could be accomplished by wading 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 10 CIP concrete piles. According to the bridge inventory or design drawings, the East and West Bents were founded on steel CIP concrete pilings. Inspection procedures followed FHWA guidance and the MnDOT Bridge and Structure Inspection Program Manual with channel bottom probing to search for bottom of foundations. The routine underwater inspection frequency is recommended to remain at a maximum of 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. Page 6 of 15

7 Bridge ID: Minnesota Structure Inventory Report CSAH 20 over POMME DE TERRE RIVER Date: 08/12/ G E N E R A L + + R O A D W A Y + + I N S P E C T I O N + Agency Br. No. Crew Bridge Match ID (TIS) 0 Userkey 116 District 04 County Swift Route Sys 04 - CSAH Number 20 Functionally Obsolete City Sect., Twp., Range Main Span Type 5 - Prestress or Precast Median Width On Bridge Main Span Design Main Span Detail Appr. Span Type Appr. Span Design Appr. Span Detail Skew 0 Culvert Type Barrel Length Cantilever ID MAIN: 3 Main Span Length Structure Length 20 - Double Tee Number of Spans APPR: 0 TOTAL: 41.3 Deck Width (Out-to-Out) 40.0 Deck Material Wear Surf Type Wear Surf Install Year Wear Course/Fill Depth Deck Membrane Deck Rebars Deck Rebars Install Year Structure Area (Out-to-Out) 4960 sq. Roadway Area (Curb-to-Curb) Sidewalk Width 50A. Lt 0.00 Curb Height 1.0 MI W OF JCT CSAH 7 Level of Service 1 - MAINLINE N - 42W Roadway Type Lt 2 - Concrete Precast Panels 6 - Bituminous None + M I S C. Structure Flared Parallel Structure Field Conn. ID Abutment Foundation (Material/Type) Pier Foundation (Material/Type) Historic Status 3 - FTG PILE 8 - CIP 4 - PILE BENT Underwater Pinned Asbly. Spec. Feat Navigation Control Year Painted 4553 sq. Traffic 50B. Rt Rt Painted Area Primer Type Posted Load B R I D G E D A T A No flare 5 - Not eligible + P A I N T + Bridge Railing 1 - MEETS STANDARDS N - No parallel structure GR Transition Appr. Guardrail GR Termini 1 - CONC Frac. Critical 0 - Not Required 0 - Not Required Horizontal 0 - Not Required 0.00 Vertical Unsound Paint % Finish Type 0 - None + B R I D G E 2-2-way traffic Latitude ' '' Control Section (TH Only) Status Longitude ' '' Reference Point Custodian Owner 02 - County Highway Agency 02 - County Highway Agency Roadway Name or Description Township FAIRFIELD CSAH 20 Desc. Loc. BMU Agreement Year Built 1997 MN Year Reconstructed FHWA Year Reconstructed MN Temporary Status Bridge Plan Location Date Opened to Traffic Maint. Area Roadway O/U Key Detour Length 3.0 mi. Lanes Route On Structure On - Off System 0 - OFF Roadway Width Legislative District 20A Vertical Clearance Potential ABC 2 - N/A Max. Vert. Clear. Service On 1 - Highway Appr. Surface Width Service Under 3 - COUNTY + S T R U C T U R E + HCADT Functional Class If Divided + R D W Y Horizontal Clear. Lateral Clearance ON 2 UNDER ADT 5 - Waterway Bridge Roadway Width YEAR 2008 N - Not Applicable + I N + W A T E R W A Y + Drainage Area (sq. mi.) Waterway Opening (sf.) 825 Pier Protection Posting VEH: Rating Date 12/10/ SUBSTANDARD 0 - SUBSTANDARD 0 - SUBSTANDARD D E P T H I N S P. + Y/N Freq Date 06/18/ No nav. control on Rail Type Lt 22 Rt 22 A 1 - No B 1 - No C 1 - No Restriction Restriction Restriction sq. ADTT 08 - Rural - Minor Collector 32.0 S I G N S + Structurally Deficient Sufficiency Rating 97.0 Routine Inspection Date 10/21/2014 Routine Inspection Frequency 24 Inspector Name + N B I Nav. Clr. () Nav. Vert. Lift Bridge Clear. () MN Scour Code Design Load Operating Rating Forsyth, Roy A - Open C O N D I T I O N Deck 5 Unsound Superstructure 7 Deck % Underclearances Waterway Adequacy 7 Approach Alignment 8 0 D I M E N S I O N S + NB-EB % SB-WB Substructure Channel 6 Culvert + N B I Structure Evaluation 7 Deck Geometry 9 Vert. 0.0 Horiz. I - LOW RISK Year C A P A C I T Y R A T I N G S HS 25 (OR GREATER) 2 - HS TRUCK Inventory Rating 2 - HS TRUCK 25.0 N N N SEMI: Overweight Permit Codes 7 N R A T I N G S + A P P R A I S A L R A T I N G S + + S A F E T Y F E A T U R E S + DBL: Page 7 of 15

8 09/12/2016 Inspector: CO Bridge MINNESOTA BRIDGE INSPECTION REPORT BRIDGE CSAH 20 OVER POMME DE TERRE RIVER County: City: Township: Swift Location: 1.0 MI W OF JCT CSAH 7 Route: 04 - CSAH 20 Ref. Pt.: FAIRFIELD Control Section: Section: 31 Township: 122N Range: 42W Maint. Area: Span Type: 5 - Prestressed Concrete 2 - Local Agency Bridge Nbr.: List: Stringer/Multi-beam or Girder NBI Deck: 5 Super: 7 Sub: 7 Chan: 6 Culv: N Open, Posted, Closed: A - Open MN Scour Code: I - LOW RISK Appraisal Ratings - Approach: 8 Waterway: 7 Required Bridge Signs - Load Posting: 0 - Not Required Traffic: 0 - Not Required Horizntal: 0 - Not Required Vertical: N - Not Applicable Length: Deck Width: 40.0 Rdwy. Area/ Pct. Unsnd: 4553 sq. / % Paint Area/ Pct. Unsnd: sq. / % Culvert: N/A Postings: Unofficial Structurally Deficient N Unofficial Functionally Obsolete N Unofficial Sufficiency Rating 97.0 ELEM NBR ELEMENT NAME REPORT TYPE INSP. DATE QUANTITY CS 1 CS 2 CS 3 CS 4 Prestressed Concrete Top Flange 08/12/ SF Underwater Notes: [2016] Migrator assumed CS SF Wearing Surfaces Underwater 08/12/ SF SF Notes: Bituminous Overlay Notes: Should be crack filled. Double-T joints have cracks above them Prestressed Concrete Open Underwater Girder/Beam 08/12/ LF LF Notes: [2016] Migrator estimated the quantity of the double tees. Verify the quantity by multiplying the number of vertical beams by the deck length. Reinforced Concrete Abutment 08/12/ LF Underwater 125 LF Notes: [2016] Migrator added 40 LF to abutment quantity to account for wingwalls (CS1:40 CS2:0 CS3:0 CS4:0). Stained from water seepage Steel Pile 08/12/ EA Underwater Notes: Paint system failing. Shells looking weathered and stained EA Steel Protective Coating Underwater 08/12/ SF SF Notes: [2016] Underwater Inspection - All of the steel piles had 100 percent loss of paint coating from 2 foot above the water line to channel bottom. The coating was in tact from 2 foot above the water line to the cap. Reinforced Concrete Pier Cap 08/12/ LF Underwater Notes: Stained from water seepage. Small spalls on downstream bottoms LF Movable Bearing 08/12/ EA Underwater 20 EA Fixed Bearing 08/12/ EA Underwater 40 EA Page 8 of 15

9 BRIDGE CSAH 20 OVER POMME DE TERRE RIVER ELEM NBR ELEMENT NAME REPORT TYPE INSP. DATE QUANTITY CS 1 CS 2 CS 3 CS 4 Reinforced Concrete Bridge Railing 08/12/ LF Underwater Notes: Numerous cracks throughout both rails LF Critical Deficiencies or Safety Hazards 08/12/ EA Underwater Notes: NO CRITICAL FINDINGS OBSERVED DURING THE LAST INSPECTION. 1 EA Bituminous Approach Roadway 08/12/ EA Underwater 2 EA Notes: 6' off East end there is settlement and cracking. Approaches have already been patched in due to settlement Secondary Members (Superstructure) 08/12/ EA Underwater 1 EA Scour 08/12/ EA Underwater Other Bridge Signing 08/12/ EA Underwater Notes: Markers all ok EA Slopes & Slope Protection 08/12/ EA Underwater 1 EA Deck & Approach Drainage 08/12/ EA Underwater 1 EA Protected Species 08/12/ EA Underwater Notes: Use this element to track the presence of protected species living on this structure. General Notes: No visible scour. 3' water in channel, approximately 4.5 feet below pier cap EA Deck NBI: Flexing seems apparent as cracks over seems are appearing on top of deck surface. 36A. Brdg Railings NBI: 36B. Transitions NBI: 36C. Appr Guardrail NBI: 36D. Appr Guardrail Terminal NBI: 59. Superstructure NBI: 60. Substructure NBI: 61. Channel NBI: 62. Culvert NBI: 71. Waterway Adeq NBI: Page 9 of 15

10 BRIDGE CSAH 20 OVER POMME DE TERRE RIVER ELEM NBR ELEMENT NAME REPORT TYPE INSP. DATE QUANTITY CS 1 CS 2 CS 3 CS Appr Roadway Alignment NBI: Inventory Notes: Inspector's Signature Reviewer's Signature Page 10 of 15

11 Pictures Photo 2 - View of Bridge 76525, looking northeast. Photo 3 - View of East Abutment, looking east. Page 11 of 15

12 Pictures Photo 4 - View of West Abutment, looking west. Photo 5 - View of Pier 1, looking east. Page 12 of 15

13 Pictures Photo 6 - View of Pier 2, looking east. Page 13 of 15

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