BRIDGE # CSAH 90 over BLUE EARTH RIVER · 2018. 1. 29. · Timber debris has accumulated at the Piers 2 and 3. (A) The channel bottom material around the substructure units consisted

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:

07569

CSAH 90 over BLUE EARTH RIVER

District 7 Blue Earth SOUTH BEND

12/02/2016

Forsyth, Roy

Roy Forsyth

County Highway AgencyOwner:

MinnesotaSTATE:

UNDERWATER SUMMARY 3

UNDERWATER INSPECTION 4

UNDERWATER INSPECTION PROCEDURES 6

STRUCTURE INVENTORY 7

ELEMENTS 8

PICTURES 12

DRAWINGS 16

TABLE OF CONTENTS

PAGE NUMBER

Contractor:

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. 07569, Piers 2, 3, and 4, were in good condition with no defects of structural significance observed. The channel bottom around the substructure units consisted of firm material, which was well established and appeared stable. The west river bank exhibited vertically eroded slopes. Timber debris has accumulated at the Piers 2 and 3.

(A) The channel bottom material around the substructure units consisted of sand, gravel, and 2 to 4 foot diameter cobbles with up to 1 inch of probe rod penetration. (B) Timber debris, 2 foot diameter and smaller was observed around the upstream nose and along both faces of Pier 2, extending from the channel bottom to 10 feet above the waterline. (C) Overall the concrete of the piers was in good condition and only exhibited random vertical cracks.(D) Vertical bank erosion was observed along the river bank, consisting of up to 15 feet high vertical cut embankments. (E) Timber debris, 3 feet diameter and smaller was observed along the east face of Pier 3 from the channel bottom to 10 foot above the waterline and 30 feet upstream and downstream of the fascias.

INSPECTION FINDINGS

Page 3 of 17

WATERLINE DATUM4.

13.1

Water Level Reference:

76.1Waterline Elevation (feet):

Top of pier cap at downstream nose of Pier 3.

Substructure(s) Inspected:

SUBSTRUCTURE INSPECTION DATA3.

Piers 2, 3, and 4

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

Each pier consists of a rectangular reinforced concrete shaft supporting a concrete hammerhead cap. The pier shafts have tapered ends with blunt noses. The piers have rectangular footings founded on caissons.

General Shape:

Code:Item 61: Channel and Channel Protection:

7

6

Code:Item 62: Culvert:

5.

The waterline was located 23.9 ft below the reference. Description:

NBIS CODING INFORMATION

Code:Item 60: Substructure:

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

1

District:

CSAH 90Facility Carried:

District 7

Bridge Description:

007 - Blue EarthCounty:

BRIDGE DATA1.


Bridge #:

BLUE EARTH RIVERFeature Intersected:

07569

Weather Conditions:

12/02/2016Date of Underwater Inspection:

Cloudy, 30F

Waterway Velocity (ft/sec):

1Underwater Visibility (feet):

INSPECTION DATA2.

The superstructure consists of a five spans of multiple prestressed concrete beams supporting a reinforced concrete deck. The superstructure is supported by two reinforced concrete abutments and four reinforced concrete piers. The abutment footings are founded on steel H-piles, while the pier footings are founded on 48 inch diameter caissons. The piers are numbered 1 through 4 starting from the west end of the bridge.

Professional Engineer/Team Leader:

Marc SternInspection Diver:

Roy Forsyth

Page 4 of 17

885 1EAScour 0

STRUCTURAL ELEMENT CONDITION RATING6.

No (Mark your selection with an X)

Item 113: Scour Critical Bridge: Code:

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

Yes X

I

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

CS4CS3CS1 CS2

LF 162162210 Concrete pier wall

Conditions

Quantity UnitElement DescriptionELEM #

Page 5 of 17

The routine underwater inspection of Bridge 07569 (CSAH 90 over Blue Earth River) was completed on December 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 3 concrete pier walls. According to the bridge inventory or design drawings, Piers 2through 4 were founded on 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)

1 - CONCCantilever ID

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

3 - FTG PILE

Underwater 60Culvert Type 3 - FTG PILE

Pinned Asbly.

12/02/2016

Barrel Length

706.7 ft. Navigation Control

Waterway Opening (sf.) 9144Structure Length

ft. Year Painted

0 - No nav. control on waterwayDeck Width (Out-to-Out) 65.3

+ P A I N T +

APPR: 0 TOTAL:5 - Not eligible

MAIN: 5

Main Span Length 140.0 ft.Drainage Area (sq. mi.) 3553.0

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 30 LEFT

Y/N Freq Date

Abutment Foundation (Material/Type)

1 - CONC Frac. Critical

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

1 - Flared+ I N

Appr. Span Detail Field Conn. ID

Parallel Structure N - No parallel structure

Pier Protection

0 - Not Required

Rating Date 10/14/201639407 sq. ft. Traffic

ft. 50B. Rt 0.00Sidewalk Width 50A. Lt 10.00

Roadway Area (Curb-to-Curb)

Posted Load 0 - Not Required

PostingStructure Area (Out-to-Out) 49678 sq. ft.

DBL:VEH: SEMI:

Rt 01 ARail Type Lt 01 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 1995

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

I - LOW RISK Year 1996Primer 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 4 - Low Slump Concrete

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 20.80

53.30Deck Rebars Install Year 1995

Deck Rebars

Finish TypeWear Course/Fill Depth 0.17 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

44 ° 7

Inspector Name Forsyth, Roy

Latitude Control Section (TH Only) Status' 55.96 ''

2 - 2-way traffic

Routine Inspection Frequency 24

Sect., Twp., Range

2.2 MI SE OF JCT TH 169 Level of Service 1 - MAINLINE

- 27W Roadway Type26 - 108N

Detour Length 4.0 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° 2 '

A - Open

Longitude 94 002+00.200 + N B I 45.12 '' Reference Point

170 Crew

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

Agency Br. No. 47

District 07

Bridge Match ID (TIS) 0 Userkey

CSAH 90 over BLUE EARTH RIVER

Minnesota Structure Inventory Report

Bridge ID: 07569

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

Date: 01/16/2017

Sufficiency Rating 99.6Roadway Name or Description

90

City

Routine Inspection Date 10/24/2014

Desc. Loc.

Township 07021 - SOUTH BEND CSAH 90

Number

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

NRoute Sys 04 - CSAHCounty 007 - Blue Earth Functionally Obsolete

Lanes

Waterway Adequacy 8Max. Vert. Clear.

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

ft.On - Off System Roadway Width 50.80 ft.

Vertical Clearance ft.1 - ON

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 50.8

44.0 ft.

Service Under

ft.

50.7 ft. Approach Alignment 8Horizontal Clear.

ft.

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

HCADT ADTT7

Year Built 1995

MN Year Reconstructed Functional Class

%Channel 6

Substructure

0Superstructure 8

ON 2 UNDER

1283 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 9NB-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 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

07021 - SOUTH BEND

108N26 27W

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

7 8 7 6 N

8 8

0 - Not Required

0 - Not Required

0 - Not Required

N - Not Applicable

I - LOW RISK

2.2 MI SE OF JCT TH 169

04 - CSAH 90

170

002+00.200

706.7

65.3

39407 sq. ft. / %

sq. ft. / %

N/A

A - Open

ft.

ft.

Postings:List:

MINNESOTA BRIDGE INSPECTION REPORT

01/30/2017

BRIDGE 07569 CSAH 90 OVER BLUE EARTH RIVER

Unofficial Structurally Deficient N

NUnofficial Functionally Obsolete

Unofficial Sufficiency Rating 99.6

ELEMNBR ELEMENT NAME INSP. DATE QUANTITY

QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4REPORT TYPE

Reinforced Concrete Deck 01/16/2017 49678 SF 49678 0 0 012 Underwater

49678 SF 49678 0 0 0Migrated Values

Notes: 2012 - No leaching showing on underneath showing.2014 - Minor leaching showing up.

510 - Wearing Surfaces 39407 SF 38619 0 788 0

Notes: Low Slump Overlay with Epoxy Rebar Notes: 2010, 2014 - Several small spalls in both lanes.

Underwater 01/16/2017


Prestressed Concrete OpenGirder/Beam

01/16/2017 6706 LF 6706 0 0 0109 Underwater

6706 LF 6706 0 0 0Migrated Values

Reinforced Concrete Pier Wall 01/16/2017 217 LF 201 16 0 0210 Underwater


Notes: 2012, 2014 - Minor cracking in all four pier walls.2015 - Minor crack from stem thru cap. Observed with MN/DOT snooper truck.

Reinforced Concrete Abutment 01/16/2017 201 LF 181 20 0 0215 Underwater


Notes: [2016] Migrator added 40 LF to abutment quantity to account for wingwalls (CS1:30 CS2:10 CS3:0 CS4:0).2012 - Minor cracking in both abutments.2014 - East abutment covered with graffiti.

Wingwall notes: 2012 - SE wing wall has minor crack.

Reinforced Concrete Pier Cap 01/16/2017 315 LF 315 0 0 0234 Underwater


Strip Seal Expansion Joint 01/16/2017 161 LF 0 161 0 0300 Underwater


Notes: 2002 - Expansion joints are full of compacted sand and road debris. Two expansion cover plates are broken out from the concrete rail.2004 - Both joints are open 4"+ @ 60 degrees F.2006 - East joint is open 4.5 inches & west joint is open 4 inches.2009 - Some plow finger skid plates are missing on both ends.2010 - Two expansion cover plates are broken out from the concrete rail, need to clean expansion joints.2014 - At 65 Degrees, east joint expanded to full width. Both joint full of debris.

Page 8 of 17

Elastomeric Bearing 01/16/2017 96 EA 96 0 0 0310 Underwater

96 EA 96 0 0 0Migrated Values

Reinforced Concrete Approach Slab 01/16/2017 1760 SF 0 1760 0 0321 Underwater


Notes: [2016] Migrator assumed an approach slab length of 20FT and used the inventory quantity of 44FT for the width.2012, 2014 - Both approach slabs have cracks.

Metal Bridge Railing 01/16/2017 5492 LF 4205 1287 0 0330 Underwater


Notes: 2010 - Paint is flaking off and many rub spots to bare metal.2012 - Same.

[2016] Migrator assumed concrete/metal combination type rail.2010 - paint is starting to flake off.2012 - Both concrete section have minor cracking. EBL metal railing has major scraps from snow plows.

515 - Steel Protective Coating 999 SF 999 0 0 0

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

Underwater 01/16/2017


Reinforced Concrete Bridge Railing 01/16/2017 4747 LF 3560 1187 0 0331 Underwater


Notes: [2016] Migrator assumed concrete/metal combination type rail.2010 - paint is starting to flake off.2012 - Both concrete section have minor cracking. EBL metal railing has major scraps from snow plows.

Critical Deficiencies or Safety Hazards 01/16/2017 1 EA 1 0 0 0800 Underwater


Notes: No critical findings observed during 2014 inspection.

Concrete Decks - Cracking & Sealing 01/16/2017 0 LF 0 0 0 0810 Underwater


Notes: 2012 - Deck has moderate cracks at minor spacing.

Plow Fingers 01/16/2017 1 EA 0 1 0 0815 Underwater


Notes: 2004 - Two plowstraps missing @ east end.2006 - Three plowstraps missing at east end & 1 missing at west end.2010 - same. 2012 - Plow straps repaired.

Secondary Members (Superstructure) 01/16/2017 1 EA 1 0 0 0855 Underwater


Concrete Shear Cracking 01/16/2017 1 EA 1 0 0 0883 Underwater


Notes: No cracks observed.

Scour 01/16/2017 1 EA 1 0 0 0885 Underwater


QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4


REPORT TYPE

Page 9 of 17

Other Bridge Signing 01/16/2017 1 EA 1 0 0 0891 Underwater


Notes: 2012 - SE bridge marker is bent and twisted.2014 - All signs in good shape.

Slopes & Slope Protection 01/16/2017 1 EA 0 1 0 0892 Underwater


Notes: 2002 - Trees should be cut from slopes and below bridge.2004 - Trees have been cut. Small trees growing in riprap.2006 - Trees ok.2009 - Trees are a continual problem.2012 - Trees at abutments need to be removed.2012 - Revised as per Collins Engineers, Inc. Report dated 09/13/2012.2014 - Trees around abutments cleared off.

Guardrail 01/16/2017 1 EA 1 0 0 0893 Underwater


Notes: 2009 - SW crash cushion is damaged.2012 - Guard rail damage repaired.

Deck & Approach Drainage 01/16/2017 1 EA 1 0 0 0894 Underwater


Notes: 2010 - small washout at NE end of walkway.2012 - Same.

Sidewalk, Curb, & Median 01/16/2017 1 EA 1 0 0 0895 Underwater


Notes: 2012, 2014 - Sidewalk has minor cracking.

Miscellaneous Items 01/16/2017 1 EA 1 0 0 0899 Underwater


Notes: 2012 - Telephone conduit attached under bridge.

Protected Species 01/16/2017 1 EA 1 0 0 0900 Underwater


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

General Notes: 2000 -Graffati on river side of Pier No. 1 and land side of Pier No. 4.2002 - Graffati has been covered over by painting.2006 - Erosion from edge of bituminous trail at NW corner of bridge.2007 - On November 19, 2007, Collins Engineers, Inc. completed an underwater inspection. NBI code for Item 60 changed to7.2008 - Snooper inspected 10/14/2008: underside of deck, concrete girders and diaphragm connections, bearing assemblieson piers. Need to check depth of scour hole at pier 1. 10/23/2008 39' from top of sidewalk to lowest point in scour hole atpier 1, plan shows 51', should not be a problem at this time.2009 - Walked the deck and below at both ends, no structural problems this date.2012, 2014 - Graffiti on end piers and abutments.2012 - Underwater inspection by Collins Engineers, Inc. 09/13/2012. See report.2015 - MN/DOT snooper truck on site 09-10-2015

58. Deck NBI:

36A. Brdg Railings NBI:

36B. Transitions NBI:

36C. Appr Guardrail NBI:

36D. Appr GuardrailTerminal NBI:

59. Superstructure NBI:

60. Substructure NBI:


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

60. Substructure NBI:

61. Channel NBI:

62. Culvert NBI:

71. Waterway Adeq NBI:

72. Appr RoadwayAlignment NBI:

Page 11 of 17

Photo 1 - Overall looking south.

Photo 2 - Pier 1 looking east.

Pictures

Page 12 of 17

Pictures

Photo 3 - Pier 2 looking east.

Photo 4 - Pier 3 looking west.

Page 13 of 17

Pictures

Photo 5 - Pier 4 looking west.

Photo 6 - East Abutment looking east.

Page 14 of 17

Pictures

Photo 7 - Typical concrete at waterline of Pier 1 looking east.

Page 15 of 17

Page 16 of 17

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BRIDGE # CSAH 90 over BLUE EARTH RIVER · 2018. 1. 29. · Timber debris has accumulated at the Piers 2 and 3. (A) The channel bottom material around the substructure units consisted

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