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:
R0156
PEDESTRIAN over PELICAN RIVER
District 4 Otter Tail Pelican Rapids
10/17/2016
Schroeder, Brian
Brian Schroeder
City or Municipal Highway AgencyOwner:
MinnesotaSTATE:
UNDERWATER SUMMARY 3
UNDERWATER INSPECTION 4
UNDERWATER INSPECTION PROCEDURES 6
STRUCTURE INVENTORY 7
ELEMENTS 8
PICTURES 11
DRAWINGS 17
TABLE OF CONTENTS
PAGE NUMBER
Contractor:
Reinspect the submerged substructure units at the normal maximum recommended (NBIS) interval of sixty (60) months.
Ayres Associates & Collins Engineers, Inc.
9687Contractor Job Number:
RECOMMENDATIONS
REPORT SUMMARY
UNDERWATER INSPECTION
The substructure units inspected at Bridge No. R0156, Piers 1 and 2, were found to be in good condition with no defects of structural significance observed. The channel bottom around the substructure units appeared stable with no evidence of significant scour or appreciable changes since the previous inspection. A water control dam structure was located approximately 500 feet downstream of the bridge.
(A) The concrete of the piers was in good and sound condition below water with only minor areas of poor consolidation, 1 inch maximum diameter, observed in random locations along all faces.
INSPECTION FINDINGS
The top of the pier on the south end of Pier 1Water Level Reference:
WATERLINE DATUM
Waterline Elevation (feet):
The waterline was approximately 3.3 feet below reference.Description:
96.7
4.
Piers 1 and 2Substructure(s) Inspected:
SUBSTRUCTURE INSPECTION DATA
General Shape:
6.5Maximum Water Depth at Substructure(s) Inspected (feet):
The piers each consist of a rectangular reinforced concrete shaft with V-shaped noses. Foundation information was not made available.
Code:Item 62: Culvert:
8
Y 48 10/2016Code: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:
PEDESTRIAN
County:
The superstructure consists of a three span, cable suspension bridge supporting a reinforced concrete deck. The superstructure is supported by two reinforced concrete abutments and two reinforced concrete piers. The piers are numbered 1 and 2 starting from the west. No foundation information was made available.
Bridge Description:
056 - Otter Tail
Facility Carried:
BRIDGE DATA1.
UNDERWATER INSPECTION
Bridge #:
PELICAN RIVERFeature Intersected:
R0156
Underwater Visibility (feet):
Sunny, 58°FWeather Conditions:
6.0
3.
Negligible/NoneWaterway Velocity (ft/sec):
10/17/2016
Professional Engineer/Team Leader:
INSPECTION DATA2.
Brian K. Schroeder, P.E.
Date of Underwater Inspection:
Brian K. Schroeder, P.E.Inspection Diver:
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
210
CS3 CS4
Reinforced Concrete Pier Wall 2020 LF
CS2ELEM # Unit CS1Element Description Quantity
The routine underwater inspection of Bridge R0156 (Pedestrian Walkway over the Pelican River (Mill Pond)) was completed on October, 17, 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 two reinforced concrete piers. Plans were not available for foundation determination. Inspection procedures followed FHWA guidance and the MnDOT Bridge and Structure Inspection Program Manual with channel bottom probing to search for 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
UNDERWATER INSPECTION
Spec. Feat.Pier Foundation (Material/Type)
1 - CONCCantilever ID
+ W A T E R W A Y +Number of Spans Historic Status
0 - UNKNOWN
Underwater 60Culvert Type 0 - UNKNOWN
Pinned Asbly.
10/17/2016
Barrel Length
282.0 ft. Navigation Control
Waterway Opening (sf.) 1170Structure Length
ft. Year Painted
0 - No nav. control on waterwayDeck Width (Out-to-Out) 5.0
+ P A I N T +
APPR: 0 TOTAL:5 - Not eligible
MAIN: 3
Main Span Length 120.0 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 3 - Steel Median Width On Bridge
ft. Bridge Railing N - NOT REQUIRED
0 - SUBSTANDARD
Main Span Design 23 - Suspension
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 Datesq. 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) 1410 sq. ft.
DBL:VEH: SEMI:
Rt NN ARail Type Lt NN 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.)
I - LOW RISK Year 1995Primer Type MN Scour Code
Painted Area
Unsound Paint % Nav. Clr. (ft.)
_
Deck Material 2 - Concrete Precast Panels 0.0Wear Surf Type N - Not Applicable (applies
only to structures with no dec
Vert. 0.0 Horiz.
S I G N S +Operating Rating 8 - PEDESTRIAN,
SPECIAL
0 - None + B R I D G E
Inventory Rating 8 - PEDESTRIAN, SPECIAL
0.0
0.0Deck Rebars Install Year
Deck Rebars
Finish TypeWear Course/Fill Depth 0.00 ft.
0 - None
Design Load 7 - PEDESTRIAN
+ C A P A C I T Y R A T I N G S +Deck Membrane
46 ° 34
Inspector Name Schroeder, Brian
Latitude Control Section (TH Only) Status' 14.14 ''
Routine Inspection Frequency 24
Sect., Twp., Range
IN CITY PARK Level of Service 0 - NONE OF THE BELOW
- 43W Roadway Type22 - 136N
Detour Length 0.0 mi.R A T I N G S +
Custodian 04 - City or Municipal Highway Agency
Owner 04 - City or Municipal Highway Agency
Deck 6 Unsound Deck %
C O N D I T I O N° 4 '
A - Open
Longitude 96+ N B I
51.80 '' Reference Point
Crew
+ I N S P E C T I O N +
Agency Br. No. 96
District 04
Bridge Match ID (TIS) 0 Userkey
PEDESTRIAN over PELICAN RIVER
Minnesota Structure Inventory Report
Bridge ID: R0156
+ G E N E R A L + + R O A D W A Y +
Date: 01/11/2017
Sufficiency Rating -2Roadway Name or DescriptionCity Pelican Rapids
Routine Inspection Date 11/25/2015
Desc. Loc.
Township
Number
NRoadway O/U Key Route On StructureMaint. Area Structurally Deficient
NRoute Sys 10 - MUNCounty 056 - Otter Tail Functionally Obsolete
Lanes
Waterway Adequacy 8Max. Vert. Clear.
ft.Legislative District 10Aft.Potential ABC 2 - N/A ft.
ft.On - Off System Roadway Width ft.
Vertical Clearance ft.0 - OFF
Underclearances N
Service On 3 - Pedestrian-bicycle Appr. Surface Width+ S A F E T Y F E A T U R E S +
5 - Waterway Bridge Roadway Width 0.0
0.0 ft.
Service Under
ft.
ft. Approach Alignment 9Horizontal Clear.
ft.
ft.+ S T R U C T U R E + Lateral Clearance
HCADT ADTT7
Year Built 1973
MN Year Reconstructed Functional Class
%Channel 8
Substructure
0Superstructure 7
ON 0 UNDER
1 YEAR 2009BMU Agreement ADT
Structure Evaluation NIf Divided
D I M E N S I O N S +Bridge Plan Location 0 - NO PLAN
Deck Geometry NNB-EB SB-WBDate Opened to Traffic
+ R D W Y
FHWA Year Reconstructed
MN Temporary Status
09 - Rural - LocalCulvert N
A P P R A I S A L R A T I N G S ++ N B I
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:
Otter Tail
Pelican Rapids
136N22 43W
3 - Steel 13 - Suspension
6 7 7 8 N
9 8
0 - Not Required
0 - Not Required
0 - Not Required
N - Not Applicable
I - LOW RISK
IN CITY PARK
10 - MUN
282.0
5.0
sq. ft. / %
sq. ft. / %
N/A
A - Open
ft.
ft.
Postings:List:
MINNESOTA BRIDGE INSPECTION REPORT
02/02/2017
BRIDGE R0156 PEDESTRIAN OVER PELICAN RIVER
Unofficial Structurally Deficient N
NUnofficial Functionally Obsolete
Unofficial Sufficiency Rating N
ELEMNBR ELEMENT NAME INSP. DATE QUANTITY
QTYCS 1
QTYCS 2
QTYCS 3
QTYCS 4REPORT TYPE
Reinforced Concrete Top Flange 10/17/2016 1410 SF 1410 0 0 016 Underwater
1410 SF 1410 0 0 0Migrated Values
Notes: [2016] Migrator assumed CS1.
510 - Wearing Surfaces 999 SF 979 0 20 0
Notes: Top of Concrete Deck with Uncoated Rebar Notes: [2013 - 2015] Hairline cracking in some concrete deck panel flanges below hingebracket bolts. Spall in concrete deck panel over N pier (occurred during fabrication).
Underwater 10/17/2016
999 SF 979 0 20 0Migrated Values
Reinforced Concrete OpenGirder/Beam
10/17/2016 99 LF 98 1 0 0110 Underwater
99 LF 98 1 0 0Migrated Values
Notes: [2016] Migrator estimated the quantity of the channel spans. Verify the quantity by multiplying the number of vertical beams (2 beamsper precast section) by the deck length.[2013 - 2015] Bottom of stem on SE corner over abutment has spalled.
Secondary Steel Cables 10/17/2016 2 EA 2 0 0 0148 Underwater
2 EA 2 0 0 0Migrated Values
Notes: [2013 - 2015] Pulleys on pier towers may be frozen causing flat spots on suspension cables possibly reducing load carrying capacity.Cotter pins missing on cable clamp connections. Possible slipping of cable as sighting along deck appears that alignment is not symmetrical. Afew cable clamps are on backward.[2015] New cotter pins were installed on cable clamp connections.
Steel Column 10/17/2016 4 EA 0 4 0 0202 Underwater
4 EA 0 4 0 0Migrated Values
Notes: [2013 - 2015] Paint chalking and minor rust on bolts connecting to pier.
515 - Steel Protective Coating 999 SF 0 0 999 0
Notes: [2016] Migrator assumed quantity of 999 SF and estimated the condition states.
Underwater 10/17/2016
999 SF 0 0 999 0Migrated Values
Reinforced Concrete Pier Wall 10/17/2016 3 LF 3 0 0 0210 Underwater
3 LF 3 0 0 0Migrated Values
Reinforced Concrete Abutment 10/17/2016 3 LF 3 0 0 0215 Underwater
3 LF 3 0 0 0Migrated Values
Notes: [2013 - 2015] Dirt and debris should be cleaned out at ends of bridge inside concrete at abutment cable anchorages.
Metal Bridge Railing 10/17/2016 564 LF 0 564 0 0330 Underwater
564 LF 0 564 0 0Migrated Values
Notes: [2013 - 2015] Paint deteriorating on railing.
515 - Steel Protective Coating 999 SF 999 0 0 0
Notes: [2016] Migrator assumed CS1 and a quantity of 999 SF.
Underwater 10/17/2016
999 SF 999 0 0 0Migrated Values
Critical Deficiencies or Safety Hazards 10/17/2016 1 EA 1 0 0 0800 Underwater
1 EA 1 0 0 0Migrated Values
Notes: NO CRITICAL FINDINGS OBSERVED DURING THE LAST INSPECTION.
Scour 10/17/2016 1 EA 1 0 0 0885 Underwater
Slopes & Slope Protection 10/17/2016 1 EA 1 0 0 0892 Underwater
1 EA 1 0 0 0Migrated Values
Notes: [2013 - 2015] Minor erosion on S slope.
Deck & Approach Drainage 10/17/2016 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 10/17/2016 1 EA 1 0 0 0895 Underwater
1 EA 1 0 0 0Migrated Values
Miscellaneous Items 10/17/2016 1 EA 1 0 0 0899 Underwater
1 EA 1 0 0 0Migrated Values
Protected Species 10/17/2016 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: Inspected by R. Anderson & W. Bugbee
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:
Minor cracking and one small spall.
Minor bank erosion on S side.
ELEMNBR ELEMENT NAME INSP. DATE QUANTITY
QTYCS 1
QTYCS 2
QTYCS 3
QTYCS 4
BRIDGE R0156 PEDESTRIAN OVER PELICAN RIVER
REPORT TYPE
ELEMNBR ELEMENT NAME INSP. DATE QUANTITY
QTYCS 1
QTYCS 2
QTYCS 3
QTYCS 4
BRIDGE R0156 PEDESTRIAN OVER PELICAN RIVER
REPORT TYPE
Inspector's Signature Reviewer's Signature
72. Appr RoadwayAlignment NBI:
Photo 1 - North Profile
Photo 2 - South Profile
Pictures
Pictures
Photo 3 - West Abutment
Photo 4 - East Abutment
Pictures
Photo 5 - Pier 1 West Face
Photo 6 - Pier 1 East Face
Pictures
Photo 7 - Pier 2 West Face
Photo 8 - Pier 2 East Face
Pictures
Photo 9 - Condition at Waterline
Photo 10 - Upstream Channel
Pictures
Photo 11 - Downstream Channel
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