BRIDGE # 173RD ST over WATONWAN RIVER · NBR ELEMENT NAME INSP. DATE QUANTITY QTY CS 1 QTY CS 2 QTY CS 3 QTY REPORT TYPE CS 4 12 Reinforced Concrete Deck Underwater 01/31/2017 14861

2017 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:

07024

173RD ST over WATONWAN RIVER

District 7 Blue Earth GARDEN CITY

12/01/2016

Forsyth, Roy

Roy Forsyth

County Highway AgencyOwner:

MinnesotaSTATE:

UNDERWATER SUMMARY 3

UNDERWATER INSPECTION 4

UNDERWATER INSPECTION PROCEDURES 6

STRUCTURE INVENTORY 7

ELEMENTS 8

PICTURES 12

DRAWINGS 16

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. 07024, Piers 1 and 2, were generally in good condition. The steel pipe piles, exhibited light surface corrosion and minor pitting, but no significant section loss or defects of structural significance were observed. The channel bottom appeared to be well established with no evidence of significant scour.

(A) The channel bottom material typically consisted of sand, gravel, and cobbles allowing up to 2 inches of probe rod penetration.(B) The steel pipe piles typically exhibited coating failure from the channel bottom to 3 feet above the waterline with light surface corrosion and no appreciable loss of section. From 3 feet above waterline to top of pile there was 10 percent loss of paint. (C) Moderate timber debris accumulation, consisting of up to 1.5 foot diameter trees and branches, was observed along the east side of Pier 2 extending from the channel bottom to 3 feet above the waterline. (D) The East and West Abutments were well armored by up to 2 foot diameter riprap.(E) The upstream pile exhibited impact damage from the waterline up 4 foot with 4 inch maximum deflection.(F) 1 foot diameter log was observed from channel bottom up 3 foot above the waterline and extending 30 foot upstream along the west face of Pier 1.

INSPECTION FINDINGS

Page 3 of 17

Bottom of Pier cap at downstream end of Pier 1. Water Level Reference:

WATERLINE DATUM

Waterline Elevation (feet):

The waterline was located 12.1 feet below the reference. Description:

892.9

4.

Piers 1 and 2Substructure(s) Inspected:

SUBSTRUCTURE INSPECTION DATA

General Shape:

4.5Maximum Water Depth at Substructure(s) Inspected (feet):

The piers consist of a single line of thirteen steel piles supporting a concrete pile cap.

Code:Item 62: Culvert:

6

Y 48 12/2016Code:Item 92B: Underwater Inspection:

Code:

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

NBIS CODING INFORMATION5.

Item 60: Substructure:

Item 61: Channel and Channel Protection:

7Code:

District 7District:

173RD ST

County:

The superstructure consists of three spans of multiple steel beams supporting a reinforced concrete deck. The superstructure is supported by two reinforced concrete abutments and two steel pile bent piers. The piers are numbered 1 and 2 starting from the west end of the bridge.

Bridge Description:

007 - Blue Earth

Facility Carried:

BRIDGE DATA1.


Bridge #:

WATONWAN RIVERFeature Intersected:

07024

Underwater Visibility (feet):

Cloudy, 30FWeather Conditions:

1

3.

1Waterway Velocity (ft/sec):

12/01/2016

Professional Engineer/Team Leader:

INSPECTION DATA2.

Roy Forsyth

Date of Underwater Inspection:

Marc SternInspection Diver:

Page 4 of 17

885 Scour 1 EA 1

STRUCTURAL ELEMENT CONDITION RATING

Conditions

6.

U

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

Item 113: Scour Critical Bridge: Code:

No (Mark your selection with an X)Yes X

225

CS3 CS4

Steel Piling 2626 EA

CS2ELEM # Unit CS1Element Description Quantity

Page 5 of 17

The routine underwater inspection of Bridge 07024 (173rd St. over Watonwan River) was completed on December, 1, 2016. Theunderwater 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 downstreamfaces 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 26 steel CIP piles. 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 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 17

Spec. Feat.Pier Foundation (Material/Type)

3 - STEELCantilever ID

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

4 - PILE BENT

Underwater 60Culvert Type 3 - FTG PILE

Pinned Asbly.

12/01/2016

Barrel Length

262.1 ft. Navigation Control

Waterway Opening (sf.) 2690Structure Length

ft. Year Painted 1983

0 - No nav. control on waterwayDeck Width (Out-to-Out) 56.7

+ P A I N T +

APPR: 0 TOTAL:5 - Not eligible

MAIN: 3

Main Span Length 97.0 ft.Drainage Area (sq. mi.) 849.0

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

N - NOT REQUIRED+ M I S C.

Appr. Span Type Structure Flared

GR Termini N - NOT REQUIRED

Appr. Guardrail

Main Span Type 4 - Steel Continuous Median Width On Bridge

ft. Bridge Railing 1 - MEETS STANDARDS

1 - MEETS STANDARDS

Main Span Design 01 - Beam Span

ft. GR Transition

Skew 25 LEFT

Y/N Freq Date

Abutment Foundation (Material/Type)

1 - CONC Frac. Critical

4 - Bolted

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 10/17/201612271 sq. ft. Traffic

ft. 50B. Rt 0.00Sidewalk Width 50A. Lt 6.00

Roadway Area (Curb-to-Curb)

Posted Load 0 - Not Required

PostingStructure Area (Out-to-Out) 14861 sq. ft.

DBL:VEH: SEMI:

Rt 22 ARail Type Lt 22 C 1 - No Restriction

1 - No Restriction

B 1 - No Restriction

N - Not Applicable Overweight Permit CodesCurb Height Lt

ft. Horizontal 0 - Not Required

0.00 ft. Vertical0.00 ft. Rt

Wear Surf Install Year

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

U - CRIT - PROT REQD

Year 2009Primer Type 6 MN Scour Code

Painted Area

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

(concurrently placed with stru

Vert. 0.0 Horiz.

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

1 - Epoxy Coated Reinforcing + B R I D G E

Inventory Rating 2 - HS TRUCK 23.60

39.40Deck Rebars Install Year 1983

Deck Rebars

Finish Type K - Unpainted 3309 SteelWear Course/Fill Depth 0.00 ft.

0 - None

Design Load 5 - HS 20

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

44 ° 2

Inspector Name Forsyth, Roy

Latitude Control Section (TH Only) Status' 49.34 ''

2 - 2-way traffic

Routine Inspection Frequency 24

Sect., Twp., Range

0.2 MI E OF JCT TH 169 Level of Service 1 - MAINLINE

- 28W Roadway Type26 - 107N

Detour Length 9.0 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 N° 10 '

A - Open

Longitude 94 000+00.186 + N B I 6.39 '' Reference Point

132 Crew

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

Agency Br. No. 47

District 07

Bridge Match ID (TIS) 0 Userkey

173RD ST over WATONWAN RIVER

Minnesota Structure Inventory Report

Bridge ID: 07024

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

Date: 01/31/2017

Sufficiency Rating 99.8Roadway Name or Description

38

City

Routine Inspection Date 09/22/2015

Desc. Loc.

Township 07007 - GARDEN CITY 173RD ST

Number

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

NRoute Sys 04 - CSAHCounty 007 - Blue Earth Functionally Obsolete

Lanes

Waterway Adequacy 7Max. Vert. Clear.

ft.Legislative District 24Bft.Potential ABC 2 - N/A ft.

ft.On - Off System Roadway Width 46.80 ft.

Vertical Clearance ft.0 - OFF

Underclearances N

Service On 5 - Highway-pedestrian Appr. Surface Width+ S A F E T Y F E A T U R E S +

5 - Waterway Bridge Roadway Width 46.8

44.0 ft.

Service Under

ft.

46.7 ft. Approach Alignment 8Horizontal Clear.

ft.

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

HCADT ADTT7

Year Built 1983

MN Year Reconstructed Functional Class

%Channel 6

Substructure

0Superstructure 7

ON 2 UNDER

371 YEAR 2008BMU Agreement ADT

Structure Evaluation 7If Divided

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

11/1/1983Deck Geometry 9

NB-EB SB-WBDate Opened to Traffic

+ R D W Y

FHWA Year Reconstructed

MN Temporary Status

09 - Rural - LocalCulvert N

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

Page 7 of 17

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:

Blue Earth

07007 - GARDEN CITY

107N26 28W

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

7 7 7 6 N

8 7

0 - Not Required

0 - Not Required

0 - Not Required

N - Not Applicable

U - CRIT - PROT REQD

0.2 MI E OF JCT TH 169

04 - CSAH 38

132

000+00.186

262.1

56.7

12271 sq. ft. / %

sq. ft. / %

N/A

A - Open

ft.

ft.

Postings:List:

MINNESOTA BRIDGE INSPECTION REPORT

02/01/2017

BRIDGE 07024 173RD ST OVER WATONWAN RIVER

Unofficial Structurally Deficient N

NUnofficial Functionally Obsolete

Unofficial Sufficiency Rating 99.8

ELEMNBR ELEMENT NAME INSP. DATE QUANTITY

QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4REPORT TYPE

Reinforced Concrete Deck 01/31/2017 14861 SF 14564 0 297 012 Underwater

11/26/2016 14861 SF 14564 0 297 0Update

Notes: Numerous transvers cracks. (Dry).2013 - Spall in center span, rebars showing. See photo.2015 - See photo of latence from deck cracking.

510 - Wearing Surfaces 12271 SF 12271 0 0 0

Notes: Top of Concrete Deck with Epoxy Reinforcement Notes: 2009 - Numerous surface cracks.2013 - Numerous transverse cracking. Mostly in center span.

Underwater 01/31/2017

12271 SF 12271 0 0 0Update 11/26/2016

Steel Open Girder/Beam 01/31/2017 1572 LF 1548 24 0 0107 Underwater

11/26/2016 1572 LF 1548 24 0 0Update

Notes: 2015 - West 4' of girder has corrosion with minor section loss.

515 - Steel Protective Coating 999 SF 984 0 15 0

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


999 SF 984 0 15 0Update 11/26/2016

Reinforced Concrete Abutment 01/31/2017 165 LF 165 0 0 0215 Underwater

11/26/2016 165 LF 165 0 0 0Update

Notes: [2016] Migrator added 40 LF to abutment quantity to account for wingwalls (CS1:40 CS2:0 CS3:0 CS4:0).2007 - West bridge seats have buidup of sand and road debris. Wet from leaking gland.

Steel Pile 01/31/2017 26 EA 0 26 0 0225 Underwater

11/26/2016 26 EA 26 0 0 0Update

Notes: [2016 Underwater Inspection] - The steel pipe piles typically exhibited coating failure from the channel bottom to 5 feet above thewaterline with light surface corrosion and no appreciable loss of section.


Notes: [2016] Migrator assumed CS1 and a quantity of 999 SF.


999 SF 999 0 0 0Update 11/26/2016

Reinforced Concrete Pier Cap 01/31/2017 125 LF 125 0 0 0234 Underwater

11/26/2016 125 LF 125 0 0 0Update

Page 8 of 17

Strip Seal Expansion Joint 01/31/2017 125 LF 0 63 0 62300 Underwater

11/26/2016 125 LF 0 63 0 62Update

Notes: 5 FT of the W gland is punctured.2009 - Heavy accumulation of road debris on west bridge seat.2011, 2013, 2015 - West gland 75% damaged.

Pourable Joint Seal 01/31/2017 161 LF 121 40 0 0301 Underwater

11/26/2016 161 LF 121 40 0 0Update

Notes: Minor failure of a section of joint.

Elastomeric Bearing 01/31/2017 24 EA 24 0 0 0310 Underwater

11/26/2016 24 EA 24 0 0 0Update

Notes: Several bearing show minor movement.2015 - Movement is minor.

Reinforced Concrete Approach Slab 01/31/2017 1760 SF 1760 0 0 0321 Underwater

11/26/2016 1760 SF 1760 0 0 0Update

Notes: [2016] Migrator assumed an approach slab length of 20FT and used the inventory quantity of 44FT for the width.2011 - Minor cracking in approach slab

Metal Bridge Railing 01/31/2017 262 LF 0 262 0 0330 Underwater

11/26/2016 262 LF 0 262 0 0Update

Notes: Railing along walkway.2007 - Minor rust.


Notes: [2016] Migrator assumed CS1 and a quantity of 999 SF.


999 SF 999 0 0 0Update 11/26/2016

Reinforced Concrete Bridge Railing 01/31/2017 525 LF 0 525 0 0331 Underwater

11/26/2016 525 LF 0 525 0 0Update

Notes: 2007 - Railing weathered and stained.2011 - about 3' concrete spalled at SE end

Critical Deficiencies or Safety Hazards 01/31/2017 1 EA 1 0 0 0800 Underwater

11/26/2016 1 EA 1 0 0 0Update

Notes: No critical findings observed during the 2015 inspection.

Concrete Decks - Cracking & Sealing 01/31/2017 0 LF 0 0 0 0810 Underwater

11/26/2016 0 LF 0 0 0 0Update

Notes: 2011 - minor cracking.

Secondary Members (Superstructure) 01/31/2017 1 EA 1 0 0 0855 Underwater

11/26/2016 1 EA 1 0 0 0Update

Concrete Shear Cracking 01/31/2017 1 EA 1 0 0 0883 Underwater

11/26/2016 1 EA 1 0 0 0Update

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

Scour 01/31/2017 1 EA 1 0 0 0885 Underwater

11/26/2016 1 EA 1 0 0 0Update

Notes: U - Scour Critical - protection required. Monitoring required.2008 - Stream flow is very low, no scour problems.


QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4


REPORT TYPE

Page 9 of 17

Other Bridge Signing 01/31/2017 1 EA 1 0 0 0891 Underwater

11/26/2016 1 EA 1 0 0 0Update

Notes: 2011 - SW bridge marker missing.

Slopes & Slope Protection 01/31/2017 1 EA 1 0 0 0892 Underwater

11/26/2016 1 EA 1 0 0 0Update

Notes: 2015 - Some trees have been cut; still some growing in rip rap and at corners of the bridge.

Guardrail 01/31/2017 1 EA 1 0 0 0893 Underwater

11/26/2016 1 EA 1 0 0 0Update

Notes: 2011 - SW section, 1 post missing blocking and bolt. No guardrail on east end of bridge.

Deck & Approach Drainage 01/31/2017 1 EA 0 1 0 0894 Underwater

11/26/2016 1 EA 0 1 0 0Update

Notes: 2008 - Catch basin outlet on SE slope is partially blocked.

Sidewalk, Curb, & Median 01/31/2017 1 EA 1 0 0 0895 Underwater

11/26/2016 1 EA 1 0 0 0Update

Protected Species 01/31/2017 1 EA 1 0 0 0900 Underwater

11/26/2016 1 EA 1 0 0 0Update

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

General Notes: Most of old noted conditions still apply. Pat Madden *Bridge 07024 3-16 No change on bridge. (185) Cut brush and smalltrees. 10-2 (90)(95) No change. (180) Debris is lodged at piers. 5-9 Snooper inspected. (90) West gland has 2' puncture.(180) NE channel bank should be monitored. (184) CM drain outlet from SW ditch is crushed. Outlet from SE is partiallyblocked. (158) 450 lin. ft. of random transverse cracks. (185) Tree and brush growth should be cut. (90) One bolt missing, twobolts loose at NE cover plate. 6-27 (180) One large tree is caught on east pier. 10-16 Same conditions exist.BR # 07024 has been transfered to Blue Earth County due to re-alighnment of TH 169. PM. [2001]Channel - Buildup of trees and debris is lodged at the east pier. Bridge condition is generally the same as previous inspectionsindicate. (90) 5 FT of the west gland is punctured. (185) Some trees have been cut; still some growing in riprap areas and atcorners of the bridge.2008 - 10/16/2008 Snooper inspected, underside of deck, weathering steel girders and diaphragms, all bolted connectionsand coverplates, bearing assemblies at piers. No problems found. P. Madden, A. Fritz.2009 - walked the deck and below at both ends, no new problems.2011 - Trees and brush hung up on east pier, see photos.2012 - Underwater inspection by Collins Engineers, Inc. on 9-11-2012. See report.2015 - MN/DOT snooper truck on site for bridge inspection 09-08-2015.

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:

Guardrail at west end of bridge.

Rating revised as per Collins Enginners, Inc recommendation 9-11-2012.

Revised as per Collins Engineers, Inc inspection 9-11-2012.

Rating revised as per Collins Engineers, Inc recommendation 9-11-2012.


QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4


REPORT TYPE

Page 10 of 17


QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4


REPORT TYPE

Inspector's Signature Reviewer's Signature

Page 11 of 17

Photo 1 - Overall looking southwest.

Photo 2 - East Abutment looking east.

Pictures

Page 12 of 17

Pictures

Photo 3 - Pier 2 looking west.

Photo 4 - West Abutment looking west.

Page 13 of 17

Pictures

Photo 5 - Overall looking northeast.

Photo 6 - Impact damage at upstream pile of Pier 1 looking east.

Page 14 of 17

Pictures

Photo 7 - Pier 1 looking east.

Page 15 of 17

Page 16 of 17

UPSTREAM FASCIA PROFILE

80'-0" 80'-0"97'-0"

Abutment

West

Abutment

East

Pier 1

~

Pier 2

~

900.0

W.L. El. 892.9

ShorelineShoreline

on 9/11/12

Channel Bottom

920.0

940.0

880.0

860.0

900.0

920.0

940.0

880.0

860.0

80'-0" 80'-0"97'-0"

Abutment

West

Abutment

East

Pier 1

~

Pier 2

~

900.0

on 9/11/12

Channel Bottom

920.0

940.0

880.0

860.0

900.0

920.0

940.0

880.0

860.0

DOWNSTREAM FASCIA PROFILE

Refer to Figure 1 for General Notes.

Note:

UPSTREAM AND DOWNSTREAMFASCIA PROFILES

DISTRICT 7, BLUE EARTH COUNTY

OVER THE WATONWAN RIVER

STRUCTURE NO. 07024

Legend

Channel Bottom per 2012 Inspection

Channel Bottom per 2016 Inspection

W.L. El. 892.9

ShorelineShoreline

on 12/1/16

Channel Bottom

on 12/1/16

Channel Bottom

12/1/2016

1"=30'

MJS

RAF

9687

UNDERWATER BRIDGE INSPECTION

DEPARTMENT OF TRANSPORTATION

MINNESOTA

Checked By: Scale:

Figure No.: 2

Drawn By: Date:

www.collinsengr.com

(651) 646-8502

St. Paul, MN. 55104

Suite 206

1599 Selby Ave.

Project: Page 17 of 17

Documents

BRIDGE # 173RD ST over WATONWAN RIVER · NBR ELEMENT NAME INSP. DATE QUANTITY QTY CS 1 QTY CS 2 QTY CS 3 QTY REPORT TYPE CS 4 12 Reinforced Concrete Deck Underwater 01/31/2017 14861