bridge # csah 18 over mississippi river · 8837 sq. ft. traffic sidewalk width 50a. lt 0.00 ft....

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:

31512

CSAH 18 over MISSISSIPPI RIVER

District 1 Itasca MORSE

09/28/2016

Stromberg, Dan

Dan Stromberg

County Highway AgencyOwner:

MinnesotaSTATE:

UNDERWATER SUMMARY 3

UNDERWATER INSPECTION 4

UNDERWATER INSPECTION PROCEDURES 6

STRUCTURE INVENTORY 7

ELEMENTS 8

PICTURES 11

BRIDGE 31512 UNDERWATER INSPECTION DRAWINGS2016

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. 31512, Piers 1 and 2, were found to be in good condition with no structurally significant defects below water. The steel piles of both piers exhibited widespread coating loss and light to moderate corrosion, which has not progressed in extent since the last inspection. Light to moderate accumulations of timber debris were observed at the upstream piles of Pier 1. An accumulation of organic material was present at the upstream nose and upstream half of the east face of Pier 2, and was comparable in size and extent to what was noted during the previous underwater inspection (2012). Overall, the channel bottom configuration appeared to be in stable condition, with no notable scour depressions observed and minimal changes in bottom configuration since last inspection.

A. The channel bottom material typically consisted of firm sandy gravel with scattered 6 inch diameter cobbles and a maximum probe rod penetration of approximately 2 inches. B. All piles exhibited coating failure, corrosion, and rust nodules covering 50% to 100% of the surface area, from 2.5 feet above the waterline to the channel bottom. The heaviest corrosion (+/- 100%) was located from 2.5 feet above to 2.5 feet below the waterline with pitting typically 1/32 inch deep and maximum 1/16 inch deep.C. There was a moderate accumulation of silted in aquatics/organics and small branchy material, approximately 4 to 5 feet mounded up at the upstream end and upstream three quarters of the east face of Pier 2 extending from approximately 1.5 to 3 feet below the waterline to the channel bottom.D. Light to moderate 6-inch-diameter and smaller timber debris with one piece of plywood and reeds extended from the channel bottom up 4 feet at the upstream piles of Pier 1.

INSPECTION FINDINGS

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The top of the pier cap on the north side of Pier 1.Water Level Reference:

WATERLINE DATUM

Waterline Elevation (feet):

The waterline was located approximately 7.5 feet below the reference.Description:

1274.2 feet

4.

Piers 1 and 2.Substructure(s) Inspected:

SUBSTRUCTURE INSPECTION DATA

General Shape:

9.5 feetMaximum Water Depth at Substructure(s) Inspected (feet):

The piers are steel shell pile (CIP) bents consisting of two lines of five piles each in a single line under a concrete cap.

Code:Item 62: Culvert:

6

Y 48 09/2016Code: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 1District:

CSAH 18

County:

The superstructure consists of three spans of prestressed concrete beams. The superstructure is supported by two reinforced concrete abutments founded on steel piles and two steel shell pile (CIP) bent piers. The piers are labeled Piers 1 and 2 starting from the west.

Bridge Description:

031 - Itasca

Facility Carried:

BRIDGE DATA1.


Bridge #:

MISSISSIPPI RIVERFeature Intersected:

31512

Underwater Visibility (feet):

Sunny, 60°FWeather Conditions:

5 feet

3.

NegligibleWaterway Velocity (ft/sec):

09/28/2016

Professional Engineer/Team Leader:

INSPECTION DATA2.

Daniel G. Stromberg

Date of Underwater Inspection:

Daniel G. StrombergInspection Diver:

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885 Scour 1 EA 1

STRUCTURAL ELEMENT CONDITION RATING

Conditions

6.

O

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 Pile 2020 EA

CS2ELEM # Unit CS1Element Description Quantity

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The routine underwater inspection of Bridge 31512 (CSAH 18 over Mississippi River) was completed on September 28, 2016. The underwater inspection was conducted from the shore. The inspection was conducted by a team consisting of a Professional Engineer Diver with a valid MnDOT Team Leader certification, a backup diver and 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 two steel shell pile (CIP) bent piers. According to design drawings, the inspected substructure units are designated as Piers 1 and 2 from west to east. Inspection procedures followed FHWA guidance and the MnDOT Bridge and Structure Inspection Program Manual with channel bottom probing to search for foundations. The maximum 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)

3 - STEELCantilever ID

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

4 - PILE BENT

Underwater 60Culvert Type 4 - PILE BENT

Pinned Asbly.

09/28/2016

Barrel Length

245.6 ft. Navigation Control

Waterway Opening (sf.) 2109Structure Length

ft. Year Painted

0 - No nav. control on waterwayDeck Width (Out-to-Out) 39.8

+ P A I N T +

APPR: 0 TOTAL:5 - Not eligible

MAIN: 3

Main Span Length 80.1 ft.Drainage Area (sq. mi.) 2930.0

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 5 - Prestress or Precast Median Width On Bridge

ft. Bridge Railing 1 - MEETS STANDARDS

0 - SUBSTANDARD

Main Span Design 01 - Beam Span

ft. GR Transition

Skew 30 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 04/24/20128837 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) 9775 sq. ft.

DBL:VEH: SEMI:

Rt 03 ARail Type Lt 03 C N - N/AN - N/A B N - N/A

N - Not Applicable Overweight Permit CodesCurb Height Lt

ft. Horizontal 1 - Object Markers

0.50 ft. Vertical0.50 ft. Rt

Wear Surf Install Year

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

O - STBL - ACT REQD

Year 2014Primer 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 14.6

24.2Deck 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

47 ° 15

Inspector Name Stromberg, Dan

Latitude Control Section (TH Only) Status' 7.03 ''

2 - 2-way traffic

Routine Inspection Frequency 24

Sect., Twp., Range

2.5 MI W OF JCT CSAH 11 Level of Service 1 - MAINLINE

- 25W Roadway Type35 - 144N

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 93 000+00.000 + N B I 14.54 '' Reference Point

Crew

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

Agency Br. No. 71

District 01

Bridge Match ID (TIS) 0 Userkey

CSAH 18 over MISSISSIPPI RIVER

Minnesota Structure Inventory Report

Bridge ID: 31512

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

Date: 01/10/2017

Sufficiency Rating 89.7Roadway Name or Description

18

City

Routine Inspection Date 10/12/2015

Desc. Loc.

Township 31027 - MORSE CSAH 18

Number

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

NRoute Sys 04 - CSAHCounty 031 - Itasca Functionally Obsolete

Lanes

Waterway Adequacy 8Max. Vert. Clear.

ft.Legislative District 04Aft.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 8Horizontal Clear.

ft.

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

HCADT ADTT7

Year Built 1974

MN Year Reconstructed Functional Class

%Channel 6

Substructure

0Superstructure 8

ON 2 UNDER

304 YEAR 2008BMU Agreement ADT

Structure Evaluation 6If Divided

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

1/1/1974Deck Geometry 8

NB-EB SB-WBDate Opened to Traffic

+ R D W Y

FHWA Year Reconstructed

MN Temporary Status

08 - Rural - Minor 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:

Itasca

31027 - MORSE

144N35 25W

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

7 8 7 6 N

8 8

0 - Not Required

1 - Object Markers

0 - Not Required

N - Not Applicable

O - STBL - ACT REQD

2.5 MI W OF JCT CSAH 11

04 - CSAH 18 000+00.000

245.6

39.8

8837 sq. ft. / %

sq. ft. / %

N/A

A - Open

ft.

ft.

Postings:List:

MINNESOTA BRIDGE INSPECTION REPORT

01/12/2017

Inspector: CO Bridge

BRIDGE 31512 CSAH 18 OVER MISSISSIPPI RIVER

Unofficial Structurally Deficient N

NUnofficial Functionally Obsolete

Unofficial Sufficiency Rating 89.7

ELEMNBR ELEMENT NAME INSP. DATE QUANTITY

QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4REPORT TYPE

Reinforced Concrete Deck 01/10/2017 9775 SF 9775 0 0 012 Underwater

9775 SF 9775 0 0 0Migrated Values

Notes: None

510 - Wearing Surfaces 8837 SF 8660 0 177 0

Notes: Top of Concrete Deck with Uncoated Rebar Notes: [2015] No changes since last notes. [2015] Chain dragging was done 2015, onesmall spot about ft. circle was heard, rest was good. [2014] Concrete deck flushing, crack sealing, deck flood sealing and concrete rail specialsurface finish sealing was done to the top and inside faces, (Five year schedule).Looks good, some minor scaling along shoulder area and couple small spalls, 2009. No changes, need to chain drag sometime, 2013.

Underwater 01/10/2017


Prestressed Concrete OpenGirder/Beam

01/10/2017 981 LF 981 0 0 0109 Underwater

981 LF 981 0 0 0Migrated Values

Notes: No issues

Reinforced Concrete Abutment 01/10/2017 138 LF 138 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).[2015] No changes since last notes. [May 2015] Rip-rap slope and undermining was fixed, mostly by hand and wheel barrels. [2009-2013] Acouple vertical cracks. West abutment starting to undermine, bottom of abutment concrete exposed. Exposed about 3" gap under concretenow, Pile visible.

Wingwall notes: look good

Steel Pile 01/10/2017 20 EA 0 20 0 0225 Underwater

20 EA 0 20 0 0Migrated Values

Notes: [2011-2015] No significant changes since last note. [June 2010] Overall, the submerged piles at Piers 1 and 2 were generally in goodcondition with complete coating failure and nodular corrosion between 2.5 feet above the waterline and the channel bottom. Thus far, thecorrosion, which was the heaviest in the upper 3 to 4 feet of the water depth, has resulted in minimal section loss with only the early stages ofpitting having depths of no more than 1/32 inch. [2009] Some rust at water and below finished paint line.

515 - Steel Protective Coating 999 SF 999 0 0 0

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

Underwater 01/10/2017


Reinforced Concrete Pier Cap 01/10/2017 79 LF 79 0 0 0234 Underwater


Notes: Look Good

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Pourable Joint Seal 01/10/2017 90 LF 0 90 0 0301 Underwater


Notes: [2015] No changes since last notes. [2009-2013] May need to repair some time, Joints just over piers.

Movable Bearing 01/10/2017 12 EA 12 0 0 0311 Underwater


Notes: No issues

Fixed Bearing 01/10/2017 12 EA 12 0 0 0313 Underwater


Notes: No Issues

Reinforced Concrete Bridge Railing 01/10/2017 489 LF 489 0 0 0331 Underwater


Notes: [2015] No changes since last note. [2014] Concrete railings sealed with surfacer, top and inside faces. [2007-2013] All looks good, acouple plow scrapes and some minor scaling.

Critical Deficiencies or Safety Hazards 01/10/2017 1 EA 1 0 0 0800 Underwater


Notes: No critical structural deficiencies or serious safety hazards are present on this structure.

Concrete Decks - Cracking & Sealing 01/10/2017 0 LF 0 0 0 0810 Underwater


Notes: [2013-2015] No changes since last note. [2014] Deck & cracks sealed, 5 yr. schedule. [2011] Some micro cracks by joint , NW pier area.

Bituminous Approach Roadway 01/10/2017 2 EA 0 2 0 0822 Underwater


Notes: [2009-2015] County crews continue to monitor and work on these areas, almost yearly.

Concrete Shear Cracking 01/10/2017 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 andprestressed concrete beams.

Scour 01/10/2017 1 EA 1 0 0 0885 Underwater


Notes: 04/15/2014: O - Stable for scour. Additional action required.[2007-2015] Nothing major to report, it comes and goes (fills back in) depending on amount of built up debris and dense organic material builtup around upstream piles.

Other Bridge Signing 01/10/2017 1 EA 1 0 0 0891 Underwater


Notes: [2015] No changes since last notes. [2011] New in place.

Slopes & Slope Protection 01/10/2017 1 EA 1 0 0 0892 Underwater


Notes: [2015] Both abutment slopes fixed with fabric and rip-rap installed, mostly by hand. [2011-2013] West abut. slope could bere-established ,slope and rip-rap has settled enough to see bottom of abut, NW 20 ft..2010. Should try reestablish slopes soon, 2011.

Guardrail 01/10/2017 1 EA 0 1 0 0893 Underwater


Notes: [2015] No changes since last notes. [2009-2013] Some snow plow damage. Height to low and has turn down end treatments.


QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4


REPORT TYPE

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Deck & Approach Drainage 01/10/2017 1 EA 1 0 0 0894 Underwater


Notes: [2015] No changes since last notes. [2007-2013]Working, mostly bituminous all the way down edges of wings.

Protected Species 01/10/2017 1 EA 1 0 0 0900 Underwater


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

General Notes:

Inspector's Signature Reviewer's Signature

Inventory Notes:

Inspected on 2-21-02 by Gary Vangen.Inspected on 12-20-2002 by Gary Vangen. BUILT 1975.SOME POCKMARKS ON WEARING SURFACE. RIP-RAP ROLLED INTO RIVER. DECK OUT TO OUT 39.8''''.FULL TREATMENT STRUCT. PLATE GUARD RAIL. 24''''-30'''' ROADWAY. CONC. DECK. O.K.-94.GUARDRAIL STARTING TO GET CHEWED UP. OPEN WATER 12-20-94. GIRDER SYSTEM. HDR RECOMMENDS MAINT.OF RIP-RAP ON ABUTS, 1996. INSPECTED 12-20-2000. SOME DELAMINATION OF DECK-<5%. ???Inspected on 12-20-2002 by Gary Vangen.Inspected on 11-30-2004 by Gary Vangen. Inspected on 1-18-2006 by Gary Vangenand Tony Ridlon. Inspected on 12-11-2006 by Gary Vangen. Should be chain dragged. Re-inspected by Gary Vangen andTony Ridlon to take pictures. Inspected on 12-14-2007 by Tony Ridlon and Gary Vangen. No new problems noted. Repaired SE plow/deck protectionangle iron, hooked by Cass Counties plow truck Mar. 2010. Inspected by Tony Ridlon, 2008, 2010, 2011, 2013, 2015.Revisited summer 2010, 2011, 2013, 2014,2015. Slope deterioration was repaired, spring 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] No changes since last note. [2015] Chain dragging was done 2015, one small spot about ft. circle was heard, rest wasgood. Minor scaling mostly at shoulders, some small spalls or rock pop outs, 2009. No changes.

[2014] Concrete railings sealed with special surface finish on top and inside faces.

no issues

[2015] No other issues noticed. Rip-rap slope and undermining was fixed, early 2015. [2009-2013] A couple vertical cracks.West abutment starting to undermine, bottom of abutment concrete exposed. Exposed about 3" gap under concrete now, Pilevisible, 2013.

[2015] all floating debris moved on. [2009] Some minor floating vegetation on upstream side of pier pile from time to time,noted. West abutment undermining, slope rip-rap settlement, 2011-2013.


QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4


REPORT TYPE

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Photo 1 - Overall View of Upstream Fascia, Looking Southeast

Photo 2 - Overall View of Downstream Fascia, Looking Northwest

Pictures

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Pictures

Photo 3 - View of Pier 1, Looking Southeast

Photo 4 - View of Pier 2, Looking Northwest

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bridge # csah 18 over mississippi river · 8837 sq. ft. traffic sidewalk width 50a. lt 0.00 ft....

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