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:

28528

CSAH 25 over Root River

District 6 Houston MOUND PRAIRIE

06/14/2016

Other

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 unit inspected at Bridge No. 28528, Pier 2, was found to be in good condition. The concrete of the pier shaft was sound and exhibited no appreciable deficiencies. The channel bottom appeared stable with a minor scour depression along the south face of the pier.

(A) A scour depression was observed at the upstream nose and south face of Pier 2 measuring 5 feet wide and 3 feet deep relative to the adjacent channel bottom.

(B) The channel bottom material consisted of sand with 2 inches of standard probe rod penetration.

INSPECTION FINDINGS

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Top of pier shaft/bottom of the hammerhead of Pier 2. Assumed reference elevation = 100.0Water Level Reference:

WATERLINE DATUM

Waterline Elevation (feet):

The waterline was approximately 9.1 feet below the reference. Description:

90.9

4.

Pier 2Substructure(s) Inspected:

SUBSTRUCTURE INSPECTION DATA

General Shape:

7.0Maximum Water Depth at Substructure(s) Inspected (feet):

The piers consist of a rectangular concrete shaft with a hammerhead cap supporting six precast concrete girders. No plans were available and the foundation configuration is unknown.

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 6District:

CSAH 25

County:

The bridge consists of four spans of precast concrete girders. The superstructure is supported by two reinforced concrete abutments and three reinforced concrete hammerhead piers. The piers are labeled Piers 1 through 3 starting from the southerly direction.

Bridge Description:

028 - Houston

Facility Carried:

BRIDGE DATA1.

UNDERWATER INSPECTION

Bridge #:

Root RiverFeature Intersected:

28528

Underwater Visibility (feet):

Sunny, 70°FWeather Conditions:

1 ft.

3.

2.0 ft/sWaterway Velocity (ft/sec):

06/14/2016

Professional Engineer/Team Leader:

INSPECTION DATA2.

Roy A. Forsyth

Date of Underwater Inspection:

Roy A. ForsythInspection Diver:

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885 Scour 1 1EA

STRUCTURAL ELEMENT CONDITION RATING

Conditions

6.

N

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

210

CS3 CS4

Reinforced Concrete Pier Wall 1818 LF

CS2ELEM # Unit CS1Element Description Quantity

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The routine underwater inspection of Bridge 28528 (CSAH 25 over the Root River) was completed on June, 14, 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 1 reinforced concrete pier wall. No plans were available and the foundation configuration is unknown. 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

UNDERWATER INSPECTION

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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.

06/14/2016

Barrel Length

475.4 ft. Navigation Control

Waterway Opening (sf.) 5427Structure Length

ft. Year Painted

0 - No nav. control on waterwayDeck Width (Out-to-Out) 39.1

+ P A I N T +

APPR: 0 TOTAL:5 - Not eligible

MAIN: 4

Main Span Length 117.9 ft.Drainage Area (sq. mi.) 65.6

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 N - NOT REQUIRED

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 0

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 2/3/200817115 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) 18620 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

0.00 ft. Vertical0.00 ft. Rt

Wear Surf Install Year

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

N - STBL - LIM SCOUR

Year 2002Primer 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 1 - Monolithic Concrete

(concurrently placed with stru

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 27.6

60.4Deck Rebars Install Year 2001

Deck Rebars

Finish TypeWear Course/Fill Depth 0.00 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

43 ° 46

Inspector Name Forsyth, Roy

Latitude Control Section (TH Only) Status' 53.57 ''

2 - 2-way traffic

Routine Inspection Frequency 24

Sect., Twp., Range

0.3 mi S of jct CSAH 21 Level of Service 1 - MAINLINE

- 05W Roadway Type28 - 104N

Detour Length 12.0 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° 26 '

A - Open

Longitude 91 001+00.250 + N B I 44.50 '' Reference Point

Crew

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

Agency Br. No. 68

District 06

Bridge Match ID (TIS) 0 Userkey

CSAH 25 over Root River

Minnesota Structure Inventory Report

Bridge ID: 28528

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

Date: 07/14/2016

Sufficiency Rating 98.8Roadway Name or Description

25

City

Routine Inspection Date 06/14/2016

Desc. Loc.

Township 28011 - MOUND PRAIRIE CSAH 25

Number

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

NRoute Sys 04 - CSAHCounty 028 - Houston Functionally Obsolete

Lanes

Waterway Adequacy 9Max. Vert. Clear.

ft.Legislative District 31Bft.Potential ABC 2 - N/A ft.

ft.On - Off System Roadway Width 32.00 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 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 ADTT7

Year Built 2001

MN Year Reconstructed Functional Class

%Channel 7

Substructure

0Superstructure 7

ON 2 UNDER

185 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 7NB-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

Page 7 of 14

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:

Houston

28011 - MOUNDPRAIRIE

104N28 05W

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

7 7 7 7 N

8 9

0 - Not Required

0 - Not Required

0 - Not Required

N - Not Applicable

N - STBL - LIM SCOUR

0.3 mi S of jct CSAH 21

04 - CSAH 25 001+00.250

475.4

39.1

17115 sq. ft. / %

sq. ft. / %

N/A

A - Open

ft.

ft.

Postings:List:

MINNESOTA BRIDGE INSPECTION REPORT

09/12/2016

Inspector: CO Bridge

BRIDGE 28528 CSAH 25 OVER Root River

Unofficial Structurally Deficient N

NUnofficial Functionally Obsolete

Unofficial Sufficiency Rating 98.8

ELEMNBR ELEMENT NAME INSP. DATE QUANTITY

QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4REPORT TYPE

Reinforced Concrete Deck 07/14/2016 18620 SF 18620 0 0 012 Underwater

06/14/2016 18620 SF 18620 0 0 0Routine

Notes: Top of Concrete Deck with Epoxy Reinforcement Notes: 2016 - No underdeck cracks or spalls between beams. A few cracks withefflorescence along the slab overhang near the piers.

510 - Wearing Surfaces 17115 SF 0 17115 0 0

Notes: Top of Concrete Deck with Epoxy Reinforcement Notes: 2010 - There are no spalls, delaminations or patches in the surface of the deck.There are numerous surface sealed longitudinal cracks in the deck that were not visible on previous inspections. These cracks appear to besurface only and do not project through the deck. In 2010, the entire deck was surface sealed. 2012-[2014] - No changes 2016 - Widespreaddeck cracking.

Underwater 07/14/2016

17115 SF 0 17115 0 0Routine 06/14/2016

Prestressed Concrete OpenGirder/Beam

07/14/2016 3297 LF 3296 1 0 0109 Underwater

06/14/2016 3297 LF 3296 1 0 0Routine

Notes: 2010-[2013] - No cracks or spalls noted. 2014-[2015] - No changes noted. 2016 - Small 11"x8" delamination on the edge of the bottomflange of the West fascia beam on span 2 near pier 1.

Reinforced Concrete Pier Wall 07/14/2016 52 LF 52 0 0 0210 Underwater

06/14/2016 52 LF 52 0 0 0Routine

Notes: 2010-[2013] - No cracks or spalls noted. 2014-[2016] - No changes noted.

Reinforced Concrete Abutment 07/14/2016 119 LF 108 11 0 0215 Underwater

06/14/2016 119 LF 108 11 0 0Routine

Notes: 2010-[2013] - No cracks or spalls noted. 2014 - 3 minor cracks in the face of the North abutment. 7 minor cracks on face and backwallof the South abutment. 2015 - 4 minor cracks in the face of the North abutment. 7 minor cracks on face and backwall of the South abutment.2016 - No change

Wingwall notes: 2011-[2013] - No cracks or spalls noted. 2014-[2016] - No change

Reinforced Concrete Pier Cap 07/14/2016 121 LF 113 8 0 0234 Underwater

06/14/2016 121 LF 113 8 0 0Routine

Notes: 2010-[2013] - No cracks or spalls noted. 2014-[2015] - Vertical cracks on both sides of pier 1 and pier 3 under G2 and G6. Pier 2 couldnot be examined at this time without a snooper. 2016 - A few minor vertical and horizontal cracks on both sides of all caps.

Strip Seal Expansion Joint 07/14/2016 75 LF 75 0 0 0300 Underwater

06/14/2016 75 LF 75 0 0 0Routine

Notes: 2010-[2013] - The strip seals were full of dirt and debris. There are no signs of leakage at the bridge seat. 2014 -[2016] - No change

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Pourable Joint Seal 07/14/2016 105 LF 105 0 0 0301 Underwater

06/14/2016 105 LF 105 0 0 0Routine

Notes: 2012-[2013] - Poured joints over each pier. 2014-[2016] - joints are in good condition at time of inspection.

Elastomeric Bearing 07/14/2016 42 EA 42 0 0 0310 Underwater

06/14/2016 42 EA 42 0 0 0Routine

Notes: The elastomeric bearings are located at piers 1 and 3 and the abutments. 2011-[2013] - The bearings are functioning as intended.2014-[2016] - No change

Fixed Bearing 07/14/2016 14 EA 14 0 0 0313 Underwater

06/14/2016 14 EA 14 0 0 0Routine

Notes: The fixed bearings are located at pier 2. 2011-[2013] - The bearing is functioning as intended. 2014-[2016] - No change

Reinforced Concrete Bridge Railing 07/14/2016 958 LF 877 81 0 0331 Underwater

06/14/2016 958 LF 877 81 0 0Routine

Notes: 2010 - Minor hairline cracks with no efflorescence. No spalls or delaminations were noted. 2012 - Minor hairline cracks with minirefflorescence at the bottom of the railings. No spalls or delaminations were noted. 2013 - Approximately 40 minor cracks in each rail.2014-[2016] - No change

Critical Deficiencies or Safety Hazards 07/14/2016 1 EA 1 0 0 0800 Underwater

06/14/2016 1 EA 1 0 0 0Routine

Notes: 2012-[2013] - None found 2014-[2016] - no critical findings were noted at the time of inspection.

Concrete Decks - Cracking & Sealing 07/14/2016 10000 LF 10000 0 0 0810 Underwater

06/14/2016 10000 LF 10000 0 0 0Routine

Notes: 2010 - There are numerous longitudinal cracks in the deck that were not visible on previous inspections. These cracks appear to besurface only and do not project through the deck. The cracks are of moderate size and density. In 2010, the entire deck was surface sealed.2012 - No change 2013 - Element CS should be a 1 as the cracks are sealed at this time. 2014-[2015] - No change 2016 - Appx. 10,000 LF ofdeck cracks. Not all cracks are sealed. Map cracking is very minor in size (1"-16" square pattern).

Bituminous Approach Roadway 07/14/2016 2 EA 0 2 0 0822 Underwater

06/14/2016 2 EA 0 2 0 0Routine

Notes: 2011-[2012] - Bituminous has been added at both approaches. There are no signs of settlement. 2013 - There is 1 full width unsealedtransverse crack on the South approach. 2014 - One full length, unsealed longitudinal crack at the centerline on the North approach. 2015 - Onefull length, unsealed, longitudinal crack at the centerline on the North approach. One full width transverse crack and a partial longitudinal crackat the centerline of the South approach. 2016 - No change

Concrete Shear Cracking 07/14/2016 1 EA 1 0 0 0883 Underwater

06/14/2016 1 EA 1 0 0 0Routine

Notes: Use this element to monitor the presence of shear cracking on concrete elements. Pay particular attention to the prestressed concretebeams. 2016 - no shear cracking noted.

Scour 07/14/2016 1 EA 0 1 0 0885 Underwater

Notes: [2016] Underwater Inspection - A scour depression was observed at the upstream nose and south face of Pier 2 measuring 5 feet wideand 3 feet deep relative to the adjacent channel bottom.

Other Bridge Signing 07/14/2016 1 EA 1 0 0 0891 Underwater

06/14/2016 1 EA 1 0 0 0Routine

Notes: 2010-[2013] - All signs are inplace. 2014-[2016] - No change

Slopes & Slope Protection 07/14/2016 1 EA 0 1 0 0892 Underwater

06/14/2016 1 EA 0 1 0 0Routine

Notes: 2010 - The riprap in front of both abutments is in good condition. There is minor slope erosion at the ends of the Southwest andSoutheast wingwalls. 2012 - The embankment slopes are stable. 2013-[2016] - No changes

ELEMNBR ELEMENT NAME INSP. DATE QUANTITY

QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4

BRIDGE 28528 CSAH 25 OVER Root River

REPORT TYPE

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Deck & Approach Drainage 07/14/2016 1 EA 1 0 0 0894 Underwater

06/14/2016 1 EA 1 0 0 0Routine

Notes: 2010-[2013] - All drains are open. 2014-[2016] - No change

Miscellaneous Items 07/14/2016 1 EA 0 1 0 0899 Underwater

06/14/2016 1 EA 0 1 0 0Routine

Notes: There is graffiti written on the pier walls of pier 1 and 3, and a small amount on the Northwest end of the rail and the North abutmentparapet wall. There are swallow nests on the bridge. The East edge of the slab has a 1" metal conduit bolted to the top of the slab behind thebridge railing. 2012 - Routine bridge inspection by Robert Pyfferoen. 2013 - Routine bridge inspection by Tom Miles. 2014 - Routine bridgeinspection by Tom Miles & Tony Bale. 2015 - Routine bridge inspection by Tom Miles. 2016 - Routine inspection by Gary Waletzki and RobertPyfferoen.

Protected Species 07/14/2016 1 EA 0 1 0 0900 Underwater

06/14/2016 1 EA 0 1 0 0Routine

Notes: 2016 - Swallow nests present.

General Notes:

Inspector's Signature Reviewer's Signature

Inventory Notes:

The bridge was inspected utilizing the snooper in 2007, 2008, 2009, 2010, & 2011. CHANNEL - NBI 7 There are minor areasof bank erosion both up and downstream of the bridge. The timber debris pile reported in 2010 has been removed. 2012 - Nochange

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:

Moderate sealed cracking. 2016 - NBI deck has been raised to a 7 due to language in the new AASHTO manual.

Minor cracks in rails

Minor cracks in abutments and pier caps. Very minor scour at pier 2 indicated in 2012 underwater inspection report.

There is minor areas of bank erosion both up and down stream of the bridge. The timber debris pile reported in 2010 has beenremoved.

ELEMNBR ELEMENT NAME INSP. DATE QUANTITY

QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4

BRIDGE 28528 CSAH 25 OVER Root River

REPORT TYPE

Page 10 of 14

Photo 2 - View of North Abutment, looking north.

Photo 3 - View of South Abutment, looking south.

Pictures

Page 11 of 14

Pictures

Photo 4 - View of Pier 2, looking southeast.

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