bridge # csah 15 over minnesota river

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:

6610

CSAH 15 over MINNESOTA RIVER

District 8 Chippewa SPARTA

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 accumulations of timber debris at the piers, and if found to be increasing, removal during routine maintenance to prevent further build-up and to restrict scour influence may be required.

(B) Because the bridge has been evaluated to be scour critical, specifically monitor the footing exposure during future inspections and after periods of high flows. Consider placement of scour countermeasures if foundation exposure is found to be increasing.

(C) 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. 6610, Piers 1 and 2, were found to be in good condition with no defects of structural significance. The footing at Pier 2 was exposed at the middle column and was flush with the channel bottom and at the upstream column there was 3 inches of vertical exposure. An area of section loss was present at the downstream nose of Pier 1. A light accumulation of timber debris was observed at Pier 1, and a light to moderate accumulation of timber debris was observed at the upstream end of Pier 2. Steel piles exhibited loss of painted coating with light corrosion and no section loss. The channel bottom consisted of firm sand and cobbles and appeared to be stable with no appreciable changes or increased scour since the previous inspection.

(A) The footing was exposed along the west side of the middle column of Pier 2 and was flush with the channel bottom.

(B) The footing was exposed along the west side of the downstream column of Pier 2 with a maximum vertical exposure of 0.4 feet.

(C) A small area of section loss was observed 2 feet above the waterline at the downstream nose of Pier 1 measuring 3 square inches with 1 inch of penetration.

(D) A light accumulation of timber debris, consisting of 6 to 8 inch diameter branches, was observed at the upstream end of Pier 1.

(E) Timber debris, consisting of 3 foot diameter and smaller logs, was observed at the upstream nose and along the east face of Pier 2 and extended from the channel bottom to 3 feet above the waterline and to the shoreline.

(F) Heavy bank erosion resulting in vertical slopes upstream and downstream of the structure on the east and west banks. Banks were well protected at the structure with up to 2 foot diameter riprap and concrete revetment. The west embankment protection was covered with silty sand.

(G) Steel piles had 100% loss of paint coating with light corrosion and no loss of section from the channel bottom to 3 feet above the waterline. From 3 feet above waterline to the cap, steel piles had 20% loss of paint coating.

(H) The channel bottom material around Pier 1 consisted of silty sand with approximately 1 foot of probe rod penetration.

(I) The channel bottom material around Pier 2 consisted of cobbles, 6 inch diameter riprap, and sandy silt with 4 inches of probe rod penetration.

INSPECTION FINDINGS

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6.6Maximum Water Depth at Substructure(s) Inspected (feet):

The original piers each consist of two hexagonal-shaped reinforced concrete columns supporting a rectangular reinforced concrete cap. The columns are each supported by a square concrete footing founded on steel H-piles. The extended portion of the piers added to the north end of the bridge each consist of a single H-pile encased in concrete and a steel pile shell. The steel shell and concrete encasement extend up into the rectangular reinforced concrete cap.

Water Level Reference:

WATERLINE DATUM4.

General Shape:

3.

None/NegligibleWaterway Velocity (ft/sec):

Piers 1 and 2Substructure(s) Inspected:

SUBSTRUCTURE INSPECTION DATA

Top of pier cap at the downstream end of Pier 2.

6Code:Item 60: Substructure:

6Code:Item 61: Channel and Channel Protection:

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

Description:

918.7Waterline Elevation (feet):

NBIS CODING INFORMATION5.

The waterline elevation was approximately 12.1 feet below the reference.

District:

CSAH 15Facility Carried:

012 - ChippewaCounty:

District 8

MINNESOTA RIVER

BRIDGE DATA1.


Feature Intersected:

6610Bridge #:

Bridge Description:

Weather Conditions:

06/18/2016Date of Underwater Inspection:

1 ft.Underwater Visibility (feet):

Sunny, 85°F

Marc Stern

INSPECTION DATA2.

The superstructure consists of three spans of multiple steel beams supporting a reinforced concrete deck. The superstructure is supported by two reinforced concrete piers and two reinforced concrete abutments. The superstructure was widened in 1990 with the addition of two pile bents and an additional steel beam. The original substructure units are founded on square reinforced concrete footings founded on steel H-piles. The piers are numbered 1 and 2 starting from the west end of the bridge.

Inspection Diver:

Roy A. ForsythProfessional Engineer/Team Leader:

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885

2

EAScour 1

4

EA2202 Steel Column

1

EA

No (Mark your selection with an X)X Yes

6. STRUCTURAL ELEMENT CONDITION RATING

Item 92B: Underwater Inspection: Code:

Item 62: Culvert: Code:

R

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

Code:

Y 48 06/2016

Item 113: Scour Critical Bridge:

CS2 CS3CS1Quantity Unit

Reinforced Concrete Column 4205

CS4

Conditions

ELEM # Element Description

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The routine underwater inspection of Bridge 6610 (CSAH No. 15 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 2 steel pilings. 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 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

189.1 ft. Navigation Control

Waterway Opening (sf.) 3255Structure Length

ft. Year Painted

0 - No nav. control on waterwayDeck Width (Out-to-Out) 35.3

+ P A I N T +

APPR: 0 TOTAL:5 - Not eligible

MAIN: 3

Main Span Length 85.0 ft.Drainage Area (sq. mi.) 4200.0

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

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 06/06/20146049 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) 6675 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

12360 sq. ft. Nav. Vert. Lift Bridge Clear. (ft.)

R - CRIT - MONITOR

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 19.2

32.0Deck Rebars Install Year 1991

Deck Rebars

Finish TypeWear Course/Fill Depth 0.16 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 ° 57

Inspector Name Forsyth, Roy

Latitude Control Section (TH Only) Status' 38.47 ''

2 - 2-way traffic

Routine Inspection Frequency 24

Sect., Twp., Range

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

- 41W Roadway Type9 - 117N

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° 48 '

A - Open

Longitude 95 000+00.000 + N B I 38.88 '' 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 15 over MINNESOTA RIVER

Minnesota Structure Inventory Report

Bridge ID: 6610

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

Date: 07/13/2016

Sufficiency Rating 96.5Roadway Name or Description

15

City

Routine Inspection Date 08/11/2015

Desc. Loc.

Township 12013 - SPARTA CSAH 15

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 20Bft.Potential ABC 2 - N/A ft.

ft.On - Off System Roadway Width 32.00 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 32.0

32.0 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 1949

MN Year Reconstructed 1991 Functional Class

%Channel 6

Substructure

0Superstructure 7

ON 2 UNDER

275 YEAR 2008BMU Agreement ADT

Structure Evaluation 6If Divided

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

8/1/1991Deck 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

12013 - SPARTA

117N9 41W

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

7 7 6 6 N

8 5

0 - Not Required

1 - Object Markers

0 - Not Required

N - Not Applicable

R - CRIT - MONITOR

3.3 MI W OF JCT TH 59

04 - CSAH 15 000+00.000

189.1

35.3

6049 sq. ft. / %

12360 sq. ft. / %

N/A

A - Open

ft.

ft.

Postings:List:

MINNESOTA BRIDGE INSPECTION REPORT

09/12/2016

Inspector: CO Bridge

BRIDGE 6610 CSAH 15 OVER MINNESOTA RIVER

Unofficial Structurally Deficient N

NUnofficial Functionally Obsolete

Unofficial Sufficiency Rating 96.5

ELEMNBR ELEMENT NAME INSP. DATE QUANTITY

QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4REPORT TYPE

Reinforced Concrete Deck 07/13/2016 6675 SF 6541 0 134 012 Underwater

6675 SF 6541 0 134 0Migrated Values

Notes: : 2015- Cracking and efflorescence on the under-surface is light. The distressed area is 2% or less of the underside area.

510 - Wearing Surfaces 6049 SF 5928 0 121 0

Notes: Top of Concrete Deck with Uncoated Rebar Notes: : 2015- There are cracks through the deck, with light efflorescence. The deck drainsare clean.

Underwater 07/13/2016


Steel Open Girder/Beam 07/13/2016 1129 LF 0 1129 0 0107 Underwater

1129 LF 0 1129 0 0Migrated Values

Notes: : 2015- The paint and the primer are peeling from the girders.

515 - Steel Protective Coating 12360 SF 0 0 12360 0

Notes: [2016] Migrator used inventory quantity of 12,360 SF and estimated the condition states.



Steel Column 07/13/2016 2 EA 0 2 0 0202 Underwater

Notes: 2015- The paint is peeling and the surface is rusting.

515 - Steel Protective Coating 60 SF 30 30 0 0

Notes: 2015- The paint is peeling and the surface is rusting.[2016] Underwater Inspection - Steel piles had 100% loss of paint coating with light corrosion and no loss of section from the channel bottom to3 feet above the waterline. From 3 feet above waterline to the cap, steel piles had 20% loss of paint coating.


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 areas of spalling, on all of the columns.[2016] Underwater Inspection - A small area of section loss was observed 2 feet above the waterline at the downstream nose of Pier 1measuring 3 square inches with 1 inch of penetration.

Reinforced Concrete Abutment 07/13/2016 112 LF 0 112 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 is a open crack between the abutment and the slope paving, needs to be sealed.

Wingwall notes: : 2015- FUNCTIONING AS INTENDED.

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

Reinforced Concrete Pier Cap 07/13/2016 72 LF 0 72 0 0234 Underwater


Notes: : 2015- There is a small spall, at the top south end, of the west pier and a 6"x 6"x 1/2" area on the top south end of the east pier.There is water running off from the bridge on to pier tops.

Strip Seal Expansion Joint 07/13/2016 105 LF 0 95 0 10300 Underwater


Notes: : 2015- The joint needs to be cleaned and inspected. The seal is leaking, the top of the east abutment cap is wet.

Elastomeric Bearing 07/13/2016 4 EA 3 1 0 0310 Underwater


Notes: : 2015- There is a bolt missing from the northwest elastic bearing plate.

Movable Bearing 07/13/2016 15 EA 0 15 0 0311 Underwater


Notes: : 2015- The mason plate hold down bolts are rusted, with a large amount of section loss

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


Notes: : 2015- APPEAR TO BE IN WORKING ORDER.

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


Notes: : 2015- There is light cracking on both rails. The steel plate between the approach rail and the bridge rail is missing, at the southwestcorner.

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- Unsealed cracks exist which are of moderate size or density, with light efflorescence.

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


Notes: : 2015- The bituminous approach is beginning to settle.

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 1 0 0885 Underwater


Notes: : 2015- There is erosion at the northwest, and the northeast corners. The east banks of the river, both upstream and downstream,needs riprap added.[2016] Underwater Inspection - The footing at Pier 2 was exposed along the west side of the middle column flush with the channel bottom andat the west side of the upstream column with 3 inch vertical exposure.


QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4


REPORT TYPE

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


Notes: : 2015- All end markers are in place.

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


Notes: : 2015- There is a area north of the slope paving, at the top of the northeast corner, that is eroding, need to have rock added. There isa open crack between the abutment and the slope paving, fill crack.

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.

Miscellaneous Items 07/13/2016 1 EA 1 0 0 0899 Underwater


Notes: : 2015- THERE IS A LARGE AMOUNT OF DEBREE IN THE OUTSIDE EDGES OF BOTH PIERS.

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:

12-There are cracks through the deck, with light efflorescence. The deck drains are clean.107-The paint and the primer are peeling from the older girders.205-There are small areas of spalling, on all of the columns.234-There is a small spall, at the top south end, of the west pier and a 6"x 6"x 1/2" area on the top south end of the east pier.There is water running off from the bridge on to pier tops.300- The joint needs to be cleaned and inspected. The seal is leaking, the top of the abutment cap is wet.310- There is a bolt missing from the northwest elastic bearing plate.311- The mason plate hold down bolts are rusted, with a large amount of section loss, bolts and nuts need to be replaced.The rocker bearings need to be serviced, are not in time with each other. The south 2 on the east side are tipped inward to themax and rusted in place, all the others are straight up and rusted and are not moving.361- There is erosion at the northwest, and the northeast corner. The northwest area, has filled with slit. The northeast needsto have rock added to full the hole above the existing rock..985- There is a area north of the slope paving, at the top of the northeast corner, that is eroding, need to have rock added.There is a open crack between the abutment and the slope paving, fill crack.988- The deck drains need to be cleaned, there is a large amount of gravel on the deck. The trees have been removed. THESTRIP JOINT SEALS NEED TO BE CLEANED.

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 15 over minnesota river

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