bridge # csah 14 over minnesota river - dot.state.mn.us · 12 reinforced concrete deck underwater...

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:

6611

CSAH 14 over MINNESOTA RIVER

District 8 Chippewa TUNSBERG

06/18/2016

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 14

TABLE OF CONTENTS

PAGE NUMBER

Contractor:

(A) Monitor the footing exposure at Pier 2 during future underwater inspections for further vertical face exposure and possible undermining of the footing.

(B) 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. 6611, Piers 1 and 2, were in good condition with no structurally significant defects observed. Both of the column footings at Pier 2 were exposed along the west face of the pier, but no undermining was detected. The steel sheeting which encased the upstream concrete column at Pier 2 and the steel pipe piles exhibited only light surface corrosion with no section loss observed. There was a moderate accumulation of timber debris observed along Pier 1. The channel bottom appeared stable and consisted of silty organic material at Pier 1, and sand and 1 foot diameter riprap at Pier 2.

(A) The footings at Pier 2 were exposed along the west side of the upstream concrete column with 2.4 feet of vertical face exposure and along west side of the downstream concrete column with 0.5 feet of vertical face exposure.

(B) The upstream concrete column at Pier 2 was encased in concrete that extended from the top of the footing to 0.8 feet above the waterline.

(C) A light accumulation of timber debris, with pieces up to 1 foot in diameter, was observed at the upstream end of Pier 2.

(D) A moderate accumulation of timber debris was observed along Pier 1, mainly at the west side of the pier.

(E) The channel bottom consisted of silty organic material with 6 inches of probe rod penetration around Pier 1.

(F) The channel bottom consisted of sand and riprap up to 1 foot in diameter with minimal probe rod penetration around Pier 2.

INSPECTION FINDINGS

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Top of pier cap at the downstream end of Pier 2.Water Level Reference:

WATERLINE DATUM

Waterline Elevation (feet):

The waterline elevation was approximately 14.1 feet below the reference. Description:

921.5

4.

Piers 1 and 2Substructure(s) Inspected:

SUBSTRUCTURE INSPECTION DATA

General Shape:

7.8Maximum Water Depth at Substructure(s) Inspected (feet):

The piers consist of two hexagon columns under a common pier cap, and two round steel shell piles outside of the columns supporting pier cap extensions. The two columns are supported by separate rectangular footings founded on H-piles.

Code:Item 62: Culvert:

6

Y 48 06/2016Code: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 8District:

CSAH 14

County:

Bridge No. 6611 is a three span, multiple steel beam structure supported by two reinforced concrete abutments and two reinforced concrete piers founded on piles. The piers are numbered 1 and 2 starting from the west.

Bridge Description:

012 - Chippewa

Facility Carried:

BRIDGE DATA1.


Bridge #:

MINNESOTA RIVERFeature Intersected:

6611

Underwater Visibility (feet):

Sunny, 80°FWeather Conditions:

1 ft.

3.

None/NegligibleWaterway Velocity (ft/sec):

06/18/2016

Professional Engineer/Team Leader:

INSPECTION DATA2.

Roy A. Forsyth

Date of Underwater Inspection:

Marc SternInspection Diver:

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Scour 1885 EA 1

202 Steel Column 4 4EA

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:

X No (Mark your selection with an X)Yes

205

CS3 CS4

Reinforced Concrete Column 44 EA

CS2ELEM # Unit CS1Element Description Quantity

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The routine underwater inspection of Bridge 6611 (CSAH No. 14 over the Minnesota River) was completed on June, 18, 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 4 reinforced concrete columns and 4 steel H-piles. According to the bridge inventory or design drawings, Piers 1 and 2 were founded on steel H-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 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


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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.

06/18/2016

Barrel Length

189.8 ft. Navigation Control

Waterway Opening (sf.) 3230Structure 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 85.0 ft.Drainage Area (sq. mi.)

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

0 - SUBSTANDARD+ M I S C.

Appr. Span Type Structure Flared

GR Termini 0 - SUBSTANDARD

Appr. Guardrail

Main Span Type 4 - Steel Continuous Median Width On Bridge

ft. Bridge Railing 1 - MEETS STANDARDS

0 - SUBSTANDARD

Main Span Design 01 - Beam Span

ft. GR Transition

Skew 0

Y/N Freq Date

Abutment Foundation (Material/Type)

1 - CONC Frac. Critical

2 - Riveted

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 06/06/20146835 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) 7459 sq. ft.

DBL:VEH: SEMI:

Rt 22 ARail Type Lt 22 C N - N/AN - N/A B N - N/A

N - Not Applicable Overweight Permit CodesCurb Height Lt

ft. Horizontal 1 - Object Markers

0.00 ft. Vertical0.00 ft. Rt

Wear Surf Install Year

29750 sq. ft. Nav. Vert. Lift Bridge Clear. (ft.)

U - CRIT - PROT REQD

Year 2007Primer Type MN Scour Code

Painted Area

Unsound Paint % Nav. Clr. (ft.)Deck Material 1 - Concrete Cast-in-Place 0.0Wear Surf Type 6 - Bituminous

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 19.8

33.0Deck Rebars Install Year 1991

Deck Rebars

Finish TypeWear Course/Fill Depth 0.17 ft.

0 - None

Design Load 4 - H 20

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

44 ° 59

Inspector Name Forsyth, Roy

Latitude Control Section (TH Only) Status' 34.58 ''

2 - 2-way traffic

Routine Inspection Frequency 24

Sect., Twp., Range

2.6 MI W OF JCT TH 59 Level of Service 1 - MAINLINE

- 41W Roadway Type32 - 118N

Detour Length 10.0 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° 50 '

A - Open

Longitude 95 000+00.000 + N B I 2.45 '' Reference Point

Crew

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

Agency Br. No. 52

District 08

Bridge Match ID (TIS) 0 Userkey

CSAH 14 over MINNESOTA RIVER

Minnesota Structure Inventory Report

Bridge ID: 6611

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

Date: 07/13/2016

Sufficiency Rating 96.6Roadway Name or Description

14

City

Routine Inspection Date 08/11/2015

Desc. Loc.

Township 12015 - TUNSBERG CSAH 14

Number

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

NRoute Sys 04 - CSAHCounty 012 - Chippewa Functionally Obsolete

Lanes

Waterway Adequacy 5Max. Vert. Clear.

ft.Legislative District 20Aft.Potential ABC 2 - N/A ft.

ft.On - Off System Roadway Width 36.00 ft.

Vertical Clearance ft.1 - ON

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 8Horizontal Clear.

ft.

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

HCADT ADTT6

Year Built 1948

MN Year Reconstructed 1991 Functional Class

%Channel 5

Substructure

0Superstructure 7

ON 2 UNDER

480 YEAR 2008BMU Agreement ADT

Structure Evaluation 6If Divided

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

6/1/1991Deck Geometry 7

NB-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

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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:

Chippewa

12015 - TUNSBERG

118N32 41W

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

7 7 6 5 N

8 5

0 - Not Required

1 - Object Markers

0 - Not Required

N - Not Applicable

U - CRIT - PROT REQD

2.6 MI W OF JCT TH 59

04 - CSAH 14 000+00.000

189.8

39.3

6835 sq. ft. / %

29750 sq. ft. / %

N/A

A - Open

ft.

ft.

Postings:List:

MINNESOTA BRIDGE INSPECTION REPORT

09/12/2016

Inspector: CO Bridge

BRIDGE 6611 CSAH 14 OVER MINNESOTA RIVER

Unofficial Structurally Deficient N

NUnofficial Functionally Obsolete

Unofficial Sufficiency Rating 96.6

ELEMNBR ELEMENT NAME INSP. DATE QUANTITY

QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4REPORT TYPE

Reinforced Concrete Deck 07/13/2016 7459 SF 7310 0 149 012 Underwater

7459 SF 7310 0 149 0Migrated Values

Notes: 2015- There are cracks, with efflorescence.

510 - Wearing Surfaces 6835 SF 6698 0 137 0

Notes: Top of Concrete Deck with Epoxy Reinforcement Notes: 2015- There are hair line cracks through the deck. THERE IS A SMALL 2"x6"HOLE NEAR THE W. PIER AT THE NW SIDE.

Underwater 07/13/2016


Steel Open Girder/Beam 07/13/2016 945 LF 0 945 0 0107 Underwater

945 LF 0 945 0 0Migrated Values

Notes: 2015- The paint and the primer are peeling, and the surface is starting to rust, on the 5 center girders. The paint is starting to peel fromthe 2 outside girders. There is impact damage on the north side of the 3rd girder from the north side, on the east span.

515 - Steel Protective Coating 29750 SF 0 0 8626 21124

Notes: [2016] Migrator used inventory quantity of 29,750 SF and estimated the condition states.



Steel Column 07/13/2016 4 EA 0 4 0 0202 Underwater

Notes: 2015- The paint system is deteriorating[2016] Underwater Inspection - Steel piles exhibited 100 percent loss of coating and minor surface corrosion with 1/8 inch maximum pitting fromchannel bottom to 5 feet above the waterline.

515 - Steel Protective Coating 120 SF 60 60 0 0

Notes: 2015- The paint system is deteriorating[2016] Underwater Inspection - Steel piles exhibited 100 percent loss of coating and minor surface corrosion with 1/8 inch maximum pittingfrom channel bottom to 5 feet above the waterline.


Reinforced Concrete Column 07/13/2016 4 EA 0 4 0 0205 Underwater

4 EA 0 4 0 0Migrated Values

Notes: 2015- There are small spalls on the columns[2016] Underwater Inspection - Concrete encasement of upstream concrete column of Pier 1 had scaling with 1/8 inch penetration.

Reinforced Concrete Abutment 07/13/2016 119 LF 75 44 0 0215 Underwater


Notes: [2016] Migrator added 40 LF to abutment quantity to account for wingwalls (CS1:0 CS2:40 CS3:0 CS4:0).2015- There are cracks, with efflorescence, at the joints between the abutments and wings, at all four corners.

Wingwall notes: 2015- There are cracks, with efflorescence, at the junctions, of the abutments and the wings.

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Steel Pile 07/13/2016 0 0 0 0 0225 Underwater

Reinforced Concrete Pier Cap 07/13/2016 79 LF 79 0 0 0234 Underwater


Notes: 2015- There is a small spall area, on the top of the south end of the east pier.

Strip Seal Expansion Joint 07/13/2016 118 LF 118 0 0 0300 Underwater


Notes: 2015- The joints need to be cleaned of gravel and the seals inspected, at both ends of the bridge.

Elastomeric Bearing 07/13/2016 8 EA 8 0 0 0310 Underwater


Notes: 2015- IN GOOD CONDITION

Movable Bearing 07/13/2016 15 EA 0 13 0 2311 Underwater


Notes: 2014 - 2015 2ND & 3RD FROM S. TIPPED THE WRONG WAY.

Fixed Bearing 07/13/2016 5 EA 5 0 0 0313 Underwater


Notes: 2015- APPEAR TO BE IN WORKING ORDER.

Reinforced Concrete Bridge Railing 07/13/2016 411 LF 34 377 0 0331 Underwater


Notes: 2015- There are minor cracks, with efflorescence. ADD 8'-6" TO EACH CORNER WITH APPROACH SLAB

Critical Deficiencies or Safety Hazards 07/13/2016 1 EA 1 0 0 0800 Underwater


Notes: DO NOT DELETE THIS SMART FLAG 2015- NO CRITICAL FINDINGS

Concrete Decks - Cracking & Sealing 07/13/2016 0 LF 0 0 0 0810 Underwater


Notes: 2015- There are small cracks, with efflorescence.

Bituminous Approach Roadway 07/13/2016 2 EA 2 0 0 0822 Underwater


Notes: NEW IN 2013 2015- IN GOOD CONDITION.

Concrete Shear Cracking 07/13/2016 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 concrete pier caps.

Scour 07/13/2016 1 EA 0 0 1 0885 Underwater


Notes: 2015- SW. CORNER IS WASHED OUT.[2016] Underwater Inspection - The footings at Pier 2 were exposed along the west side of the upstream concrete column with 2.4 feet ofvertical face exposure and along west side of the downstream concrete column with 0.5 feet of vertical face exposure.


QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4


REPORT TYPE

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Other Bridge Signing 07/13/2016 1 EA 0 0 1 0891 Underwater


Notes: THE W END MARKERS ARE INPLACE AND IN GOOD CONDITION AND THE E. SIDE IS MISSING.

Slopes & Slope Protection 07/13/2016 1 EA 1 0 0 0892 Underwater


Notes: 2015- THERE IS DEBIS AGAINST THE WEST PIER.

Guardrail 07/13/2016 4 EA 4 0 0 0893 Underwater


Notes: NEW IN 2014 2015- THE GUARDRAIL IS IN GOOD CONDITION

Deck & Approach Drainage 07/13/2016 1 EA 1 0 0 0894 Underwater


Notes: Use this element to rate the condition, function, and adequacy of the drainage system.

Sidewalk, Curb, & Median 07/13/2016 1 EA 1 0 0 0895 Underwater


Notes: 2015- THE CURB IS IN GOOD CONDITION.

Protected Species 07/13/2016 1 EA 1 0 0 0900 Underwater


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

General Notes:

Inventory Notes:

26- THERE ARE HAIRLINE CRACKS THROUGH DECK.107- THE PAINT AND PRIMER PEELING AND SURFACE IS STARTING TO RUST ON THE 5 CENTER GIRDER. THEPAINT IS STARTING TO PEEL FROM THE 2 OUTSIDE GIRDERS.205- SMALL SPALLS ON COLUMNS.215- THERE ARE CRACK WITH EFFLORESCENCE AT JUNCTIONS OF ABUTMENTS AND WING WALLS AT ALL FOURCORNERS.234- SPALL AREA ON TOP SOUTH END OF EAST PIER, MAY BE DUE TO IMPACT DAMAGE.300- THE STRIP SEAL JOINT NEEDS TO BE CLEANED AND INSPECTED FOR HOLES.331- THERE ARE SMALL CRACKS WITH EFFLORESCENCE ON THE RAILS.358- THERE ARE SMALL CRACKS A 1/16" OR LESS ON THE BOTTOM OF THE DECK.359- THERE ARE HAIRLINE CRACKS WITH EFFLORESCENCE THROUGH THE DECK.387- THERE ARE CRACKS WITH EFFLORESCENCE AT JUNCTIONS OF ABUTMENTS AND WING WALLS, AT ALL 4CORNERS.

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:


QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4


REPORT TYPE

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QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4


REPORT TYPE

Inspector's Signature Reviewer's Signature

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Photo 2 - View of East Abutment, looking east.

Photo 3 - View of West Abutment, looking west.

Pictures

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Pictures

Photo 4 - View of Pier 1, looking east.

Photo 5 - View of Pier 2, looking east.

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bridge # csah 14 over minnesota river - dot.state.mn.us · 12 reinforced concrete deck underwater...

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