2016 UNDERWATER BRIDGE INSPECTION REPORT. CSAH 22 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 22 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 , Pier 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 exhibited 100 percent loss of paint coating with light surface corrosion and 1/8 inch maximum pitting from 1 foot above the water line to the channel bottom. There was a scour hole encroaching on the northwest wing wall. The channel bottom material typically consisted of sand with 6 inches of probe rod penetration. INSPECTION FINDINGS (A) All of the steel piles exhibited 100 percent loss of paint coating with light surface corrosion and 1/8 inch maximum pitting from 1 foot above the water line to the channel bottom. (B) There was a scour hole encroaching on the northwest wing wall. (C) 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 22 District Swift Bridge Description: The bridge superstructure was 3 main spans of precast concrete girders supporting a cast in place concrete deck. The substructure consisted of 2 reinforced concrete abutments and 2 reinforced concrete pier caps supported by steel CIP concrete piles. The piers were identified as the East and West Bents from east to west respectively. 2. INSPECTION DATA Professional Engineer/Team Leader: Inspection Diver: Date of Underwater Inspection: Weather Conditions: Underwater Visibility (feet): Waterway Velocity (ft/sec): Roy Forsyth Marc Stern 06/18/2016 Sunny, 75 F ft/s 3. SUBSTRUCTURE INSPECTION DATA Substructure(s) Inspected: West and East Bents General Shape: Each pier consists of a reinforced concrete pier cap founded on steel CIP concrete piles. Maximum Water Depth at Substructure(s) Inspected (feet): WATERLINE DATUM Water Level Reference: Waterline Elevation (feet): Description: Top of pier cap at the upstream end of West Bent The waterline was approximately 9.3 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 7 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 22 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 2 bents consisting of 5 CIP piles each. According to the bridge inventory or design drawings, 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 22 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 22 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 Culvert Type Barrel Length Cantilever ID MAIN: 3 Main Span Length Structure Length 01 - Beam Span Skew 15 RIGHT Number of Spans APPR: 0 TOTAL: 40.2 Deck Width (Out-to-Out) 39.3 Deck Material Wear Surf Type Wear Surf Install Year Wear Course/Fill Depth Deck Membrane Deck Rebars Structure Area (Out-to-Out) 4744 sq. Roadway Area (Curb-to-Curb) Sidewalk Width 50A. Lt 0.00 Curb Height 0.4 MI E OF JCT CSAH 7 Level of Service 1 - MAINLINE Lt 1 - Concrete Cast-in-Place 1 - Monolithic Concrete Deck Rebars Install Year N - 42W Roadway Type 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 4349 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 1 - Epoxy Coated Reinforcing + B R I D G E 2-2-way traffic Latitude ' 2.42 '' 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 22 Desc. Loc. BMU Agreement Year Built 1992 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 1 - ON 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 Y N + W A T E R W A Y + Drainage Area (sq. mi.) Waterway Opening (sf.) 1010 Pier Protection Posting VEH: 0 - SUBSTANDARD 0 - SUBSTANDARD 0 - SUBSTANDARD D E P T H I N S P. + Y/N Freq Date N Rating Date 12/10/ /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 07 - Rural - Major Collector 34.0 S I G N S + Structurally Deficient Sufficiency Rating 98.0 Routine Inspection Date 10/21/2015 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 8 Unsound Superstructure 8 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 7 Culvert + N B I Structure Evaluation 7 Deck Geometry 8 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 22 OVER POMME DE TERRE RIVER County: City: Township: Swift Location: 0.4 MI E OF JCT CSAH 7 Route: 04 - CSAH 22 Ref. Pt.: FAIRFIELD Control Section: Section: 9 Township: 122N Range: 42W Maint. Area: Span Type: 5 - Prestressed Concrete 2 - Local Agency Bridge Nbr.: List: Stringer/Multi-beam or Girder NBI Deck: 8 Super: 8 Sub: 7 Chan: 7 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: 39.3 Rdwy. Area/ Pct. Unsnd: 4349 sq. / % Paint Area/ Pct. Unsnd: sq. / % Culvert: N/A Postings: Unofficial Structurally Deficient N Unofficial Functionally Obsolete N Unofficial Sufficiency Rating 98.0 ELEM NBR ELEMENT NAME REPORT TYPE INSP. DATE QUANTITY CS 1 CS 2 CS 3 CS 4 Reinforced Concrete Deck 06/18/ SF Underwater Notes: Top of Concrete Deck with Epoxy Reinforcement Notes: [2016] Migrator assumed CS SF Wearing Surfaces Underwater 06/18/ SF Notes: Top of Concrete Deck with Epoxy Reinforcement Notes: 4349 SF Prestressed Concrete Open Underwater Girder/Beam 06/18/ LF LF Reinforced Concrete Abutment 06/18/ LF Underwater 122 LF Notes: [2016] Migrator added 40 LF to abutment quantity to account for wingwalls (CS1:40 CS2:0 CS3:0 CS4:0). One crack in center of East abutment and one crack in West abutment between 1st and 2nd beam (North side) Steel Pile 06/18/ EA Underwater Notes: [ 10 EA Steel Protective Coating Underwater 06/18/ SF SF Notes: [2016] Underwater Inspection - All of the steel piles exhibited 100 percent loss of paint coating with light surface corrosion and 1/8 inch maximum pitting from 1 foot above the water line to the channel bottom. Reinforced Concrete Pier Cap 06/18/ LF Underwater 82 LF Movable Bearing 06/18/ EA Underwater 12 EA Fixed Bearing 06/18/ EA Underwater 12 EA Page 8 of 15

9 BRIDGE CSAH 22 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 06/18/ LF Underwater Notes: Minor cracking on both rails. Painted in LF Critical Deficiencies or Safety Hazards 06/18/ EA Underwater Notes: NO CRITICAL FINDINGS OBSERVED DURING THE LAST INSPECTION. 1 EA Bituminous Approach Roadway 06/18/ EA Underwater Notes: Patched in Need monitoring yearly EA Concrete Shear Cracking 06/18/ EA Underwater 1 EA Scour 06/18/ EA Underwater Notes: [2016] Underwater Inspection - There was a scour hole encroaching on the northwest wing wall of the West Abutment. Other Bridge Signing 06/18/ EA Underwater Notes: Bridge end markers all in-place EA Slopes & Slope Protection 06/18/ EA Underwater 1 EA Deck & Approach Drainage 06/18/ EA Underwater 1 EA Protected Species 06/18/ EA Underwater Notes: Use this element to track the presence of protected species living on this structure. General Notes: No visible scour. 2' of water in channel EA Deck NBI: 36A. Brdg Railings NBI: 36B. Transitions NBI: 36C. Appr Guardrail NBI: 36D. Appr Guardrail Terminal NBI: 59. Superstructure NBI: 60. Substructure NBI: 2016] Underwater Inspection - Changed to All of the steel piles exhibited 100 percent loss of paint coating with light surface corrosion and 1/8 inch maximum pitting from 1 foot above the water line to the channel bottom. 61. Channel NBI: 62. Culvert NBI: Page 9 of 15

10 BRIDGE CSAH 22 OVER POMME DE TERRE RIVER ELEM NBR ELEMENT NAME REPORT TYPE INSP. DATE QUANTITY CS 1 CS 2 CS 3 CS Waterway Adeq NBI: 72. Appr Roadway Alignment NBI: Inventory Notes: Roy Forsyth Inspector's Signature Reviewer's Signature Page 10 of 15

11 Pictures Photo 2 - View of East Abutment, looking east. Photo 3 - View of West Abutment, looking west. Page 11 of 15

12 Pictures Photo 4 - View of West Bent, looking east. Photo 5 - View of East Bent, looking east. Page 12 of 15

13 Pictures Photo 6 - View of scour hole at the northwest wing wall, looking north. Page 13 of 15

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