BRIDGE # CSAH 40 over BIG FORK RIVER...Final Report Date: 31533 CSAH 40 over BIG FORK RIVER District 1 Itasca T - 62 R - 25 08/02/2016 Forsyth, Roy Roy Forsyth Owner: County Highway

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:

31533

CSAH 40 over BIG FORK RIVER

District 1 Itasca T - 62 R - 25

08/02/2016

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 14

TABLE OF CONTENTS

PAGE NUMBER

Contractor:

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

Collins Engineers, Inc.

9687Contractor Job Number:

RECOMMENDATIONS

REPORT SUMMARY

UNDERWATER INSPECTION

The substructure units inspected at Bridge No. 31533, Piers 1 and 2, were found to be in good condition with no defects of structural significance observed. An erosion gully, approximately 7 feet wide by 6 feet deep, was observed around the southeast embankment. All steel piles exhibited loss of painted coating from 1 foot above waterline to channel bottom. The channel bottom consisted of cobbles with gravel infill with 3 inches of penetration at Pier 2 and 12 inches of penetration at Pier 1. A log, 1 foot in diameter by 20 feet long, was observed at Pier 2 from the channel bottom up 1 foot.

(A) The southeast embankment had a 7 foot wide by 6 foot deep erosion gully.

(B) All steel piles had 100% loss of painted coating from 1 foot above waterline to the channel bottom, and 25% loss of painted coating from 1 foot above waterline to top of piles.

(C) A log, 1 foot in diameter by 20 feet long, was observed from channel bottom up 1 foot.

(D) The channel bottom at Pier 1 consisted of silt, sand, and gravel with 3 inches of maximum probe rod penetration.

(E) The channel bottom at Pier 2 consisted of 12 inch diameter cobbles with gravel infill and 12 inches of maximum probe rod penetration.

INSPECTION FINDINGS

Page 3 of 15

Top of pier cap at upstream end of Pier 1Water Level Reference:

WATERLINE DATUM

Waterline Elevation (feet):

The waterline was approximately 11.8 feet below reference. Description:

88.2

4.

Piers 1 and 2Substructure(s) Inspected:

SUBSTRUCTURE INSPECTION DATA

General Shape:

3.9Maximum Water Depth at Substructure(s) Inspected (feet):

Piers 1 and 2 consist of a single line of seven steel piles supporting a reinforced concrete cap.

Code:Item 62: Culvert:

6

Y 48 08/2016Code: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:

6Code:

District 1District:

CSAH 40

County:

The superstructure consists of three spans of multiple prestressed concrete beams. The superstructure is supported by two reinforced concrete abutments founded on piles and two steel encased concrete pile piers. The piers are numbered 1 and 2 starting from the west end of the bridge.

Bridge Description:

031 - Itasca

Facility Carried:

BRIDGE DATA1.


Bridge #:

BIG FORK RIVERFeature Intersected:

31533

Underwater Visibility (feet):

Sunny, 75°FWeather Conditions:

0.5

3.

None/NegligibleWaterway Velocity (ft/sec):

08/02/2016

Professional Engineer/Team Leader:

INSPECTION DATA2.

Roy A. Forsyth

Date of Underwater Inspection:

Marc SternInspection Diver:

Page 4 of 15

885 Scour 1 EA 1

STRUCTURAL ELEMENT CONDITION RATING

Conditions

6.

N

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 Pilings 1414 EA

CS2ELEM # Unit CS1Element Description Quantity

Page 5 of 15

The routine underwater inspection of Bridge 31533 (CSAH 40 over the Big Fork River) was completed on August 2, 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 piers of 7 steel pilings each. According to the bridge inventory or design drawings, Piers 1 and 2 were founded on steel piles. 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 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.

INSPECTION PROCEDURES


Page 6 of 15

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

UnderwaterCulvert Type 3 - FTG PILE

Pinned Asbly.

08/02/2016

Barrel Length

218.6 ft. Navigation Control

Waterway Opening (sf.) 1880Structure Length

ft. Year Painted

0 - No nav. control on waterwayDeck Width (Out-to-Out) 39.3

+ P A I N T +

APPR: 0 TOTAL:5 - Not eligible

MAIN: 3

Main Span Length 71.6 ft.Drainage Area (sq. mi.) 919.0

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

1 - MEETS STANDARDS+ M I S C.

Appr. Span Type Structure Flared

GR Termini 1 - MEETS STANDARDS

Appr. Guardrail

Main Span Type 5 - Prestress or Precast Median Width On Bridge

ft. Bridge Railing 1 - MEETS STANDARDS

1 - MEETS STANDARDS

Main Span Design 01 - Beam Span

ft. GR Transition

Skew 15 RIGHT

Y/N Freq Date

Abutment Foundation (Material/Type)

1 - CONC Frac. Critical

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 11/03/20157868 sq. ft. Traffic

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

Roadway Area (Curb-to-Curb)

Posted Load 0 - Not Required

PostingStructure Area (Out-to-Out) 8591 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.)

N - STBL - LIM SCOUR

Year 2000Primer Type MN Scour Code

Painted Area

Unsound Paint % Nav. Clr. (ft.)

1 - Not required

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 25.6

42.4Deck Rebars Install Year 1997

Deck Rebars

Finish TypeWear Course/Fill Depth 0.75 ft.

0 - None

Design Load 9 - HS 25 (OR GREATER)

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

47 ° 53

Inspector Name Forsyth, Roy

Latitude Control Section (TH Only) Status' 0.50 ''

2 - 2-way traffic

Routine Inspection Frequency 24

Sect., Twp., Range

0.7 MI W OF JCT CR 260 Level of Service 1 - MAINLINE

- 25W Roadway Type7 - 062N

Detour Length 11.0 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° 35 '

A - Open

Longitude 93 001+00.850 + N B I 20.11 '' Reference Point

31 Crew

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

Agency Br. No. 71

District 01

Bridge Match ID (TIS) 0 Userkey

CSAH 40 over BIG FORK RIVER

Minnesota Structure Inventory Report

Bridge ID: 31533

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

Date: 08/17/2016

Sufficiency Rating 99.9Roadway Name or Description

40

City

Routine Inspection Date 11/18/2015

Desc. Loc.

Township 31075 - T - 62 R - 25 CSAH 40

Number

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

NRoute Sys 04 - CSAHCounty 031 - Itasca Functionally Obsolete

Lanes

Waterway Adequacy 9Max. Vert. Clear.

ft.Legislative District 03Aft.Potential ABC 2 - N/A ft.

ft.On - Off System Roadway Width 36.00 ft.

Vertical Clearance ft.0 - OFF

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 36.0

36.0 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 1997

MN Year Reconstructed Functional Class

%Channel 6

Substructure

0Superstructure 8

ON 2 UNDER

110 YEAR 2008BMU Agreement ADT

Structure Evaluation 7If Divided

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

Deck Geometry 8NB-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 15

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:

Itasca

31075 - T - 62 R - 25

062N7 25W

5 - Prestressed Concrete 2 -Stringer/Multi-beam or Girder

7 8 6 6 N

7 9

0 - Not Required

0 - Not Required

0 - Not Required

N - Not Applicable

N - STBL - LIM SCOUR

0.7 MI W OF JCT CR 260

04 - CSAH 40

31

001+00.850

218.6

39.3

7868 sq. ft. / %

sq. ft. / %

N/A

A - Open

ft.

ft.

Postings:List:

MINNESOTA BRIDGE INSPECTION REPORT

09/16/2016

Inspector: CO Bridge

BRIDGE 31533 CSAH 40 OVER BIG FORK RIVER

Unofficial Structurally Deficient N

NUnofficial Functionally Obsolete

Unofficial Sufficiency Rating 99.9

ELEMNBR ELEMENT NAME INSP. DATE QUANTITY

QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4REPORT TYPE

Reinforced Concrete Deck 08/17/2016 8591 SF 8591 0 0 012 Underwater

8591 SF 8591 0 0 0Migrated Values

Notes: [2009-2015] No new cracks noticed, all look same. [2008] Random underdeck craking w/ efflorescence.

510 - Wearing Surfaces 7868 SF 7711 0 157 0

Notes: Top of Concrete Deck with Epoxy Reinforcement Notes: [2015] All deterioration and transverse cracks in top of deck were resealed anddeck was flood sealed in 2015. CS updated to accurately reflect field conditions as previously noted. [2009-2013] Some transverse cracking incenter span. [Saw cut cracks and epoxied same in 2003.][ Crack repairs look good.]

Underwater 08/17/2016


Prestressed Concrete OpenGirder/Beam

08/17/2016 853 LF 853 0 0 0109 Underwater

853 LF 853 0 0 0Migrated Values

Notes: Excellent, No issues

Reinforced Concrete Abutment 08/17/2016 125 LF 125 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).[2008] A couple minor vertical cracks, otherwise no issues.

Wingwall notes: [2015] Erosion close to SE wing filled in, seems stable so far. [2009] Erosion of SE ditch area starting to expose some ofwingwall, erosion problem WAS in design. Monitoring, 2010, 2011, 2013.

Steel Pile 08/17/2016 14 EA 0 14 0 0225 Underwater

14 EA 14 0 0 0Migrated Values

Notes: [2015] No changes since last notes. [2010- 2013] We drilled Artesian relief holes in two of the piles on the East Pier, their is evidence ofwater coming out of a few of them now. [2013] We also have them on annual maintenance list to clean out drilled holes so they don't plug andlet water up into cap, again.[2016] Underwater Inspection - All steel piles had 100% loss of painted coating from 1 foot above waterline to the channel bottom, and 25%loss of painted coating from 1 foot above waterline to top of piles.

515 - Steel Protective Coating 110 SF 40 70 0 0

Notes: [2016] Underwater Inspection - All steel piles had 100% loss of painted coating from 1 foot above waterline to the channel bottom, and25% loss of painted coating from 1 foot above waterline to top of piles.

Underwater 08/17/2016


Reinforced Concrete Pier Cap 08/17/2016 79 LF 40 39 0 0234 Underwater


Notes: [2015] No changes since last inspection. [2010- 2013] We drilled Artesian relief holes in two of the piles on the East Pier, their isevidence of water coming out of a few of them now, otherwise their are no changes of the cracks. [2007] East peir cap has cracks above 3rdpile from north ,about half way up on both sides of cap. and also hairline cracks above second pile from south going 2/3 way up just on riverside. west pier south edge some hairline cracking (like two upsidedown T's hooked together. The cracks over 3rd pile in from N ,E pier cap areBigger hairs, -1/16" or so, 12-30-08. No changes.

Page 8 of 15

Compression Joint Seal 08/17/2016 85 LF 0 85 0 0302 Underwater


Notes: [2015] Added more Bituminous crack leveler / sealer. [2007-2011] Missing glan is replaced by cold mix. [2013] Cleaned and filled jointwith a new Bituminous crack sealer, 2012, seems to be working nicely.

Movable Bearing 08/17/2016 8 EA 8 0 0 0311 Underwater


Notes: All in place and look good.

Fixed Bearing 08/17/2016 8 EA 8 0 0 0313 Underwater


Notes: Are mostly incased in concrete, what we see looks ok.

Reinforced Concrete Approach Slab 08/17/2016 1440 SF 720 720 0 0321 Underwater


Notes: [2016] Migrator assumed an approach slab length of 20FT and used the inventory quantity of 36FT for the width.[2015] Added more Bituminous crack leveler / sealer. [2007-2011] West approach panel needs repair-spalling. Both E8S need repair. [2013]We also cleaned and filled/patched with a new Bituminous crack sealer, 2012, seems to be working nicely.

Reinforced Concrete Bridge Railing 08/17/2016 440 LF 440 0 0 0331 Underwater


Notes: [2015] Crews painted on a concrete surface finish this year, top and front face only. [2007-2013] Look good, some vertical cracks,typical.

Critical Deficiencies or Safety Hazards 08/17/2016 1 EA 1 0 0 0800 Underwater


Notes: NO CRITICAL FINDINGS OBSERVED DURING THE LAST INSPECTION.

Concrete Decks - Cracking & Sealing 08/17/2016 0 LF 0 0 0 0810 Underwater


Notes: [2015] Resealed all cracks in top of deck. [2007-2013] No significant changes since last inspection. [2003] Cracks in top of deck havebeen sawed and epoxi filled. repairs holding.

Concrete Shear Cracking 08/17/2016 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 prestressed concretebeams.

Scour 08/17/2016 1 EA 1 0 0 0885 Underwater


Notes: stable, no issues.

Other Bridge Signing 08/17/2016 1 EA 1 0 0 0891 Underwater


Notes: All signs in place

Slopes & Slope Protection 08/17/2016 1 EA 1 0 0 0892 Underwater


Notes: [2015] SE wing erosion area fixed. [2009-2013]Other than SE Corner, all are mostly stable.

Guardrail 08/17/2016 1 EA 1 0 0 0893 Underwater


Notes: All in good condition.


QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4


REPORT TYPE

Page 9 of 15

Deck & Approach Drainage 08/17/2016 1 EA 1 0 0 0894 Underwater


Notes: West storm sewer seems to be working as intended.

Miscellaneous Items 08/17/2016 1 EA 1 0 0 0899 Underwater


Notes: Diaphragm look good.

Protected Species 08/17/2016 1 EA 1 0 0 0900 Underwater


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

General Notes:

Inspector's Signature Reviewer's Signature

Inventory Notes:

Probed on 11-03-2003. No scour found. SOME TRANVERSE UNDERDECK CRACKING IN CENTER SPAN. Probed forscour-none found. West approach panel and exp. joint need repair.Inspected on 12-10-2007 by Tony Ridlon and Gary Vangen. pier cap cracking was noted. Erosion issue fixed 2015. Inspectedby Tony Ridlon, 2008, 2009, 2011, 2013, 2015. Revisited last summer, 2008-2015.

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:

[2015] Crews resealed deck cracks, sealed and patched deck / approach panel joint areas, no other issues. [2009-2013]Isolated deterioration, mainly at end of deck joint. [2008] Some transverse cracking in center span. Saw cut cracks andepoxied same in 2003. Crack repairs look good.

some vertical cracks

No issues

[2015] No changes since last inspection. [2010- 2013] We drilled Artesian relief holes in two of the piles on the East Pier, theiris evidence of water coming out of a few of them now, otherwise their is no changes of the cracks in pier cap. [2007-2009]couple minor vertical cracks in substructures.[2016 Underwater Inspection] - Changed to 6 due to loss of painted coating on piles.

[2015] looks to be more erosion sediment in channel from SE ditch drainage and repair issues. [2007-2013] SE drainage, ditcherosion, no major changes since last inspection.


QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4


REPORT TYPE

Page 10 of 15

Photo 2 - View of West Abutment, looking west.

Photo 3 - View of East Abutment, looking east.

Pictures

Page 11 of 15

Pictures

Photo 4 - View of Pier 1, looking east.

Photo 5 - View of Pier 2, looking west.

Page 12 of 15

Pictures

Photo 6 - View of erosion at Southeast Embankment, looking south.

Page 13 of 15

Figure No.: 1

Scale: NTS

Legend

N

SOUNDING PLAN

UNDERWATER BRIDGE INSPECTION

DEPARTMENT OF TRANSPORTATION

MINNESOTA

INSPECTION AND SOUNDING PLAN

TYPICAL END VIEW OF PIERS

(Typ.)

Shoreline

Sounding Depth (8/03/16)

Flo

wWest Abutment

East Abutment

Pier 2Pier 1

Riprap

2

4

3

-2.0

-2.1 -3.3 -6.0 -6.0 -3.9

-3.5-3.0

-1.5 -5.5 -7.4 -7.4

Concrete Pile

16" Diameter Steel Encased

Concrete Pile

Battered 16" Diameter Steel Encased

Drawn By: JCG

Checked By: RAF

Date: 8/02/2016

DISTRICT 1, ITASCA COUNTY

OVER THE BIG FORK RIVER

STRUCTURE NO. 31533

between the substructure units.

4. Soundings were taken parallel to the bridge at 1/4 point intervals

measured in feet. All soundings are based on 2016 waterline location.

3. Soundings indicate the water depth at the time of inspection and are

assumed reference the waterline elevation was 88.2

available a reference elevation of 100.0 was assumed. Based on the

end of Pier 1. Since insufficient bridge elevation information was

located approximately 11.8 feet below the top of pier cap at upstream

2. At the time of inspection on August 2, 2016, the waterline was

1. Piers 1 and 2 were inspected underwater.

GENERAL NOTES:

Big Fork

River

5

5

1

4

5 A log, 1 foot diameter by 20 feet long, was observed from channel bottom up 1 foot.

bottom and 25% loss of painted coating from 1 foot above waterline to top of piles.

4 All steel piles had 100% loss of painted coating from 1 foot above waterline to channel

and 12 inches of maximum probe rod penetration.

3 The channel bottom at Pier 2 consisted of 12 inch diameter cobbles with gravel infill

maximum probe rod penetration.

2 The channel bottom at Pier 1 consisted of silt, sand, and gravel with 3 inches of

1 The southeast embankment had 7 foot wide by 6 foot deep errosion gully.

INSPECTION NOTES:

(Typ.)

Shoreline

63-9687 Figure No.: 1



MINNESOTA

Checked By: Scale:

Drawn By: Date:

www.collinsengr.com

(651) 646-8502

St. Paul, MN. 55104

Suite 206

1599 Selby Ave.

Project: Page 14 of 15

Figure No.: 2



MINNESOTA

UPSTREAM AND DOWNSTREAMFASCIA PROFILES

UPSTREAM FASCIA PROFILE

DOWNSTREAM FASCIA PROFILE

Refer to Figure 1 for General Notes.

Note:

~ W. Abutment ~ E. Abutment~ Pier 1 ~ Pier 2

~ W. Abutment ~ E. Abutment~ Pier 1 ~ Pier 2

Shoreline Shoreline

Shoreline

W.L. El. 88.2

W.L. El. 88.2

120

100

80

60

120

100

80

60

120

100

80

60

120

100

80

60

on 8/02/16

Channel Bottom

Scale: NTS

Date: 8/02/2016Drawn By: JCG

Checked By: RAF

Legend

Channel Bottom per 2016 Inspection

on 8/02/16

Channel Bottom

DISTRICT 1, ITASCA COUNTY

OVER THE BIG FORK RIVER

STRUCTURE NO. 31533

Shoreline

63-9687



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 15 of 15

Documents

BRIDGE # CSAH 40 over BIG FORK RIVER...Final Report Date: 31533 CSAH 40 over BIG FORK RIVER District 1 Itasca T - 62 R - 25 08/02/2016 Forsyth, Roy Roy Forsyth Owner: County Highway