bridge # csah 14 over minnesota river - dot.state.mn.us · 12 reinforced concrete deck underwater...
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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
Page 3 of 15
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.
UNDERWATER INSPECTION
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:
Page 4 of 15
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
Page 5 of 15
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
UNDERWATER INSPECTION
Page 6 of 15
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
Page 7 of 15
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
6835 SF 6698 0 137 0Migrated Values
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.
Underwater 07/13/2016
29750 SF 0 0 8626 21124Migrated Values
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.
Underwater 07/13/2016
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
119 LF 75 44 0 0Migrated Values
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.
Page 8 of 15
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
79 LF 79 0 0 0Migrated Values
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
118 LF 118 0 0 0Migrated Values
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
8 EA 8 0 0 0Migrated Values
Notes: 2015- IN GOOD CONDITION
Movable Bearing 07/13/2016 15 EA 0 13 0 2311 Underwater
15 EA 0 13 0 2Migrated Values
Notes: 2014 - 2015 2ND & 3RD FROM S. TIPPED THE WRONG WAY.
Fixed Bearing 07/13/2016 5 EA 5 0 0 0313 Underwater
5 EA 5 0 0 0Migrated Values
Notes: 2015- APPEAR TO BE IN WORKING ORDER.
Reinforced Concrete Bridge Railing 07/13/2016 411 LF 34 377 0 0331 Underwater
411 LF 34 377 0 0Migrated Values
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
1 EA 1 0 0 0Migrated Values
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
0 LF 0 0 0 0Migrated Values
Notes: 2015- There are small cracks, with efflorescence.
Bituminous Approach Roadway 07/13/2016 2 EA 2 0 0 0822 Underwater
2 EA 2 0 0 0Migrated Values
Notes: NEW IN 2013 2015- IN GOOD CONDITION.
Concrete Shear Cracking 07/13/2016 1 EA 1 0 0 0883 Underwater
1 EA 1 0 0 0Migrated Values
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
1 EA 0 1 0 0Migrated Values
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.
ELEMNBR ELEMENT NAME INSP. DATE QUANTITY
QTYCS 1
QTYCS 2
QTYCS 3
QTYCS 4
BRIDGE 6611 CSAH 14 OVER MINNESOTA RIVER
REPORT TYPE
Page 9 of 15
Other Bridge Signing 07/13/2016 1 EA 0 0 1 0891 Underwater
1 EA 0 0 1 0Migrated Values
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
1 EA 1 0 0 0Migrated Values
Notes: 2015- THERE IS DEBIS AGAINST THE WEST PIER.
Guardrail 07/13/2016 4 EA 4 0 0 0893 Underwater
4 EA 4 0 0 0Migrated Values
Notes: NEW IN 2014 2015- THE GUARDRAIL IS IN GOOD CONDITION
Deck & Approach Drainage 07/13/2016 1 EA 1 0 0 0894 Underwater
1 EA 1 0 0 0Migrated Values
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
1 EA 1 0 0 0Migrated Values
Notes: 2015- THE CURB IS IN GOOD CONDITION.
Protected Species 07/13/2016 1 EA 1 0 0 0900 Underwater
1 EA 1 0 0 0Migrated Values
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:
ELEMNBR ELEMENT NAME INSP. DATE QUANTITY
QTYCS 1
QTYCS 2
QTYCS 3
QTYCS 4
BRIDGE 6611 CSAH 14 OVER MINNESOTA RIVER
REPORT TYPE
Page 10 of 15
ELEMNBR ELEMENT NAME INSP. DATE QUANTITY
QTYCS 1
QTYCS 2
QTYCS 3
QTYCS 4
BRIDGE 6611 CSAH 14 OVER MINNESOTA RIVER
REPORT TYPE
Inspector's Signature Reviewer's Signature
Page 11 of 15
Photo 2 - View of East Abutment, looking east.
Photo 3 - View of West Abutment, looking west.
Pictures
Page 12 of 15
Pictures
Photo 4 - View of Pier 1, looking east.
Photo 5 - View of Pier 2, looking east.
Page 13 of 15
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