bridge # csah 6 over chippewa river - dot.state.mn.us€¦ · above the water surface to the...

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:

76505

CSAH 6 over CHIPPEWA RIVER

District 4 Swift SWENODA

06/19/2016

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 13

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. 76505, the East and West Piers, were found to be generally in good condition below water with no defects of structural significance observed. There was a 100 percent loss of paint coating from 5 foot above the water surface to the channel bottom with light surface corrosion. The channel bottom material typically consisted of 2 inch diameter cobbles with sand infill.

(A) There was a 100 percent loss of paint coating from 5 foot above the water surface to the channel bottom with light surface corrosion.

(B) The channel bottom material typically consisted of 12 inch diameter cobbles with sand infill.

INSPECTION FINDINGS

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Bottom of cap at the upstream nose of Pier 1.Water Level Reference:

WATERLINE DATUM

Waterline Elevation (feet):

The waterline was approximately 11.1 feet below the reference. Description:

1003.5

4.

East and West PiersSubstructure(s) Inspected:

SUBSTRUCTURE INSPECTION DATA

General Shape:

3.7Maximum Water Depth at Substructure(s) Inspected (feet):

Each pier consists of a pier cap supported on 7 steel piles.

Code:Item 62: Culvert:

7

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:

7Code:

District 4District:

CSAH 6

County:

The bridge consisted of 3 main spans of steel beam spans supporting a concrete cast in place deck. The substructure consisted of 2 reinforced concrete abutments founded on footing piles and 2 piers of CIP piles. The piers were the West and East piers from west to east respectively.

Bridge Description:

076 - Swift

Facility Carried:

BRIDGE DATA1.


Bridge #:

CHIPPEWA RIVERFeature Intersected:

76505

Underwater Visibility (feet):

Sunny, 80°FWeather Conditions:

0.5 ft.

3.

1.5 ft/sWaterway Velocity (ft/sec):

06/19/2016

Professional Engineer/Team Leader:

INSPECTION DATA2.

Roy A. Forsyth

Date of Underwater Inspection:

Roy A. ForsythInspection Diver:

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885 Scour 1 EA 1

STRUCTURAL ELEMENT CONDITION RATING

Conditions

6.

I

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 1414 EA

CS2ELEM # Unit CS1Element Description Quantity

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The routine underwater inspection of Bridge 76505 (CSAH 6 over the Chippewa River) was completed on June, 19, 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. 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 14 steel piles. According to the bridge inventory or design drawings, the East and West Piers 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 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)

8 - CIPCantilever ID

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

4 - PILE BENT

Underwater YCulvert Type 3 - FTG PILE

Pinned Asbly. N

06/19/2016

Barrel Length

158.6 ft. Navigation Control

Waterway Opening (sf.) 1708Structure 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 60.0 ft.Drainage Area (sq. mi.) 1730.0

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

NAbutment 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 6/18/20085705 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) 6233 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 0 - Not Required

0.25 ft. Vertical0.25 ft. Rt

Wear Surf Install Year

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

I - LOW RISK Year 1998Primer Type 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

0 - None + B R I D G E

Inventory Rating 2 - HS TRUCK 23.0

38.0Deck Rebars Install Year

Deck Rebars

Finish TypeWear 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

45 ° 11

Inspector Name Forsyth, Roy

Latitude Control Section (TH Only) Status' 43.80 ''

2 - 2-way traffic

Routine Inspection Frequency 24

Sect., Twp., Range

0.3 MI W OF JCT CSAH 19 Level of Service 1 - MAINLINE

- 40W Roadway Type15 - 120N

Detour Length 4.0 mi.R A T I N G S +

Custodian 02 - County Highway Agency

Owner 02 - County Highway AgencyDeck 6 Unsound

Deck %

C O N D I T I O N° 40 '

A - Open

Longitude 95 017+00.040 + N B I 15.34 '' Reference Point

Crew

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

Agency Br. No. 116

District 04

Bridge Match ID (TIS) 0 Userkey

CSAH 6 over CHIPPEWA RIVER

Minnesota Structure Inventory Report

Bridge ID: 76505

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

Date: 08/09/2016

Sufficiency Rating 97.0Roadway Name or Description

6

City

Routine Inspection Date 11/19/2015

Desc. Loc.

Township 76018 - SWENODA CSAH 6

Number

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

NRoute Sys 04 - CSAHCounty 076 - Swift Functionally Obsolete

Lanes

Waterway Adequacy 7Max. 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

32.0 ft.

Service Under

ft.

ft. Approach Alignment 5Horizontal Clear.

ft.

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

HCADT ADTT7

Year Built 1980

MN Year Reconstructed Functional Class

%Channel 7

Substructure

0Superstructure 6

ON 2 UNDER

189 YEAR 2008BMU Agreement ADT

Structure Evaluation 6If 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

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:

Swift

76018 - SWENODA

120N15 40W

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

6 6 7 7 N

5 7

0 - Not Required

0 - Not Required

0 - Not Required

N - Not Applicable

I - LOW RISK

0.3 MI W OF JCT CSAH 19

04 - CSAH 6 017+00.040

158.6

39.3

5705 sq. ft. / %

sq. ft. / %

N/A

A - Open

ft.

ft.

Postings:List:

MINNESOTA BRIDGE INSPECTION REPORT

09/12/2016

Inspector: CO Bridge

BRIDGE 76505 CSAH 6 OVER CHIPPEWA RIVER

Unofficial Structurally Deficient N

NUnofficial Functionally Obsolete

Unofficial Sufficiency Rating 97.0

ELEMNBR ELEMENT NAME INSP. DATE QUANTITY

QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4REPORT TYPE

Reinforced Concrete Deck 06/19/2016 6233 SF 6233 0 0 012 Underwater

6233 SF 6233 0 0 0Migrated Values

Notes: Cracks showing through - white efflorescence present. 11-19-15

510 - Wearing Surfaces 5705 SF 5591 0 114 0

Notes: Top of Concrete Deck with Uncoated Rebar Notes: Minor deck cracking randomly throughout. 11-19-15

Underwater 06/19/2016


Steel Open Girder/Beam 06/19/2016 633 LF 133 500 0 0107 Underwater

633 LF 133 500 0 0Migrated Values

515 - Steel Protective Coating 999 SF 210 0 789 0

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



Reinforced Concrete Abutment 06/19/2016 119 LF 0 119 0 0215 Underwater


Notes: [2016] Migrator added 40 LF to abutment quantity to account for wingwalls (CS1:0 CS2:40 CS3:0 CS4:0).1 crack in the middle of East abutment. Cracking on diaphragms on both abutments. Settlement under bridge. Bottom of East abutmentexposed. Concerns about settlement continuing. 11-19-15

Wingwall notes: 1 crack in Southeast wingwall, and Northeast wingwall has settlement around it. 11-19-15

Steel Pile 06/19/2016 14 EA 0 14 0 0225 Underwater

14 EA 0 14 0 0Migrated Values

515 - Steel Protective Coating 160 SF 0 60 100 0

Notes: [2016] Underwater Inspection - There was a 100 percent loss of paint coating from 5 foot above the water surface to the channel bottomwith light surface corrosion on all piles.



Reinforced Concrete Pier Cap 06/19/2016 79 LF 0 79 0 0234 Underwater


Movable Bearing 06/19/2016 8 EA 0 8 0 0311 Underwater


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Fixed Bearing 06/19/2016 8 EA 0 8 0 0313 Underwater


Reinforced Concrete Bridge Railing 06/19/2016 315 LF 0 315 0 0331 Underwater


Notes: Minor cracking on both rails. Rails painted in 2001. Could use repainting again. 11-19-15

Critical Deficiencies or Safety Hazards 06/19/2016 1 EA 1 0 0 0800 Underwater


Notes: NO CRITICAL FINDINGS OBSERVED DURING THE LAST INSPECTION.

Concrete Decks - Cracking & Sealing 06/19/2016 0 LF 0 0 0 0810 Underwater


Bituminous Approach Roadway 06/19/2016 1 EA 1 0 0 0822 Underwater


Notes: Bituminous has been periodically patched to correct the ride behind abutments, due to settlement. 11-19-15

Concrete Shear Cracking 06/19/2016 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 06/19/2016 1 EA 1 0 0 0885 Underwater

Other Bridge Signing 06/19/2016 1 EA 1 0 0 0891 Underwater


Notes: Markers in-place. 11-19-15

Slopes & Slope Protection 06/19/2016 1 EA 1 0 0 0892 Underwater


Notes: Brush trimmed since last inspection. 11-19-15

Deck & Approach Drainage 06/19/2016 1 EA 0 1 0 0894 Underwater


Protected Species 06/19/2016 1 EA 1 0 0 0900 Underwater


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

General Notes: 2' of water in channel. No visible scour. 11-19-15

58. Deck NBI:

36A. Brdg Railings NBI:

36B. Transitions NBI:

36C. Appr Guardrail NBI:

36D. Appr GuardrailTerminal 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

Roy Forsyth

Inventory Notes:

36D. Appr GuardrailTerminal NBI:

59. Superstructure NBI:

60. Substructure NBI:

61. Channel NBI:

62. Culvert NBI:

71. Waterway Adeq NBI:

72. Appr RoadwayAlignment NBI:

Approaches and bridge have vertical grade change, horizontal curves, and settlement behind abutments requiring periodicpatching.

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Photo 2 - View of East Abutment, looking east.

Photo 3 - View of the 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 west.

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bridge # csah 6 over chippewa river - dot.state.mn.us€¦ · above the water surface to the...

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