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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:
7221
CSAH 24 over VERMILLION RIVER
District 1 St. Louis PORTAGE
06/19/2016
Full Body Harness, UB-30, Non-destructive TestingEquipment - Olympus Epoch 600 portable ultrasonic flawdetector. 1/2" diameter 5 Mhz transducer. 30°-70°-70°creeping wave transducer.
Janulis, Lukas
Lukas Janulis
County Highway AgencyOwner:
MinnesotaSTATE:
UNDERWATER SUMMARY 3
UNDERWATER INSPECTION 4
UNDERWATER INSPECTION PROCEDURES 6
STRUCTURE INVENTORY 7
ELEMENTS 8
PHOTOGRAPHS 12
BRIDGE 7221 UNDERWATER INSPECTION DRAWINGS 2016 14
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. 7221, Piers 1 and 2, were found to be generally in good condition with no defects of structural significance below water. The concrete was typically sound with only light scaling present. Scour depressions, 6 feet in radius and a maximum of 2 feet deep, were observed at the upstream and downstream columns of Piers 1 and 2. Otherwise, the channel bottom at the bridge appeared stable with no indication of channel bottom degradation as compared to the previous underwater inspection findings.
(A) Scaling was observed from 1.5 feet above the waterline to the channel bottom with a 1/2 inch maximum penetration (1/4 inch typical) at upstream and downstream columns of Piers 1 and 2.
(B) Scour depressions, 6 feet in radius and up to 2 feet deep, were observed at the upstream columns of Pier 1 and 2. Also, scour depressions, 6 feet in radius and up to 1 foot deep, were observed at the downstream columns of Piers 1 & 2.
(C) A light accumulation of timber debris, consisting of two 6 inch diameter logs (approx. 10 feet long each), was located on the channel bottom across the upstream column of Pier 2.
(E) The channel bottom material consisted of scattered rocks up to 2 feet in diameter and smaller, sandy silt, and gravel with up to 6 inches of probe rod penetration.
INSPECTION FINDINGS
Page 3 of 15
Below the top of the pier cap at the upstream end of Pier 2.Water Level Reference:
WATERLINE DATUM
Waterline Elevation (feet):
The waterline was located approximately 7.1 feet below the reference.Description:
1209.4 feet
4.
Piers 1 and 2Substructure(s) Inspected:
SUBSTRUCTURE INSPECTION DATA
General Shape:
7.8 feetMaximum Water Depth at Substructure(s) Inspected (feet):
The piers consist of a rectangular reinforced concrete pile cap supported by two concrete columns.
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 1District:
CSAH 24
County:
The superstructure consists of a three span, steel girder bridge supporting a reinforced concrete deck. The superstructure is supported by two reinforced concrete abutments and two reinforced concrete column bents. The columns are founded on rectangular footings supported on piles. The piers are numbered 1 and 2, starting from the south end of the bridge.
Bridge Description:
069 - St. Louis
Facility Carried:
BRIDGE DATA1.
UNDERWATER INSPECTION
Bridge #:
VERMILLION RIVERFeature Intersected:
7221
Underwater Visibility (feet):
Sunny, 80°FWeather Conditions:
4.0 feet
3.
1.5 ft/secWaterway Velocity (ft/sec):
06/19/2016
Professional Engineer/Team Leader:
INSPECTION DATA2.
Lukas Janulis
Date of Underwater Inspection:
Lukas JanulisInspection Diver:
Page 4 of 15
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
205
CS3 CS4
Reinforced Concrete Column 44 EA
CS2ELEM # Unit CS1Element Description Quantity
Page 5 of 15
The routine underwater inspection of Bridge 7221 (CSAH 24 over Vermillion River) was completed on June 19, 2016. The underwater inspection was conducted from 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 in accordance with OSHA regulations. Channel bottom 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 piers. According to the bridge inventory, the columns of Piers 1 and 2 are founded on rectangular footings supported on piles. 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
UNDERWATER INSPECTION
Page 6 of 15
S - Pin and Hanger 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
07/09/2013
Underwater Y 60Culvert Type 3 - FTG PILE
Pinned Asbly. 60
06/19/2016
Barrel Length
212.2 ft. Navigation Control
Waterway Opening (sf.) 2376Structure Length
ft. Year Painted
0 - No nav. control on waterwayDeck Width (Out-to-Out) 30.5
+ P A I N T +
APPR: 0 TOTAL:5 - Not eligible
MAIN: 3
Main Span Length 80.0 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 1 - MEETS STANDARDS
Appr. Guardrail
Main Span Type 4 - Steel Continuous Median Width On Bridge
ft. Bridge Railing 0 - SUBSTANDARD
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
N - No Splice
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 07/17/20130 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) 6472 sq. ft.
DBL:VEH: SEMI:
Rt 37 ARail Type Lt 37 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
0 sq. ft. Nav. Vert. Lift Bridge Clear. (ft.)
I - LOW RISK YearPrimer Type MN Scour Code
Painted Area
Unsound Paint % 10 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 15.5
25.9Deck Rebars Install Year
Deck Rebars
Finish TypeWear Course/Fill Depth 0.00 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
48 ° 7
Inspector Name Janulis, Lukas
Latitude Control Section (TH Only) Status' 25.67 ''
2 - 2-way traffic
Routine Inspection Frequency 24
Sect., Twp., Range
0.1 MI N OF JCT CSAH23 Level of Service 1 - MAINLINE
- 17W Roadway Type9 - 065N
Detour Length 99.0 mi.R A T I N G S +
Custodian 02 - County Highway Agency15
Owner 02 - County Highway AgencyDeck 5 Unsound
Deck %
C O N D I T I O N° 31 '
A - Open
Longitude 92 032+00.408 + N B I 23.33 '' Reference Point
345 Crew
+ I N S P E C T I O N +
Agency Br. No. 109
District 01
Bridge Match ID (TIS) 0 Userkey
CSAH 24 over VERMILLION RIVER
Minnesota Structure Inventory Report
Bridge ID: 7221
+ G E N E R A L + + R O A D W A Y +
Date: 09/07/2016
Sufficiency Rating 79.8Roadway Name or Description
24
City
Routine Inspection Date 07/13/2015
Desc. Loc.
Township 69056 - PORTAGE CSAH 24
Number
NRoadway O/U Key Route On StructureMaint. Area Structurally Deficient
NRoute Sys 04 - CSAHCounty 069 - St. Louis Functionally Obsolete
Lanes
Waterway Adequacy 8Max. Vert. Clear.
ft.Legislative District 06Aft.Potential ABC 2 - N/A ft.
ft.On - Off System Roadway Width 28.00 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 28.0
40.0 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 1962
MN Year Reconstructed Functional Class
%Channel 7
Substructure
0Superstructure 6
ON 2 UNDER
115 YEAR 2008BMU Agreement ADT
Structure Evaluation 6If Divided
D I M E N S I O N S +Bridge Plan Location 3 - COUNTY
Deck Geometry 6NB-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:
St. Louis
69056 - PORTAGE
065N9 17W
4 - Steel Continuous 2 -Stringer/Multi-beam or Girder
5 6 7 7 N
8 8
0 - Not Required
1 - Object Markers
0 - Not Required
N - Not Applicable
I - LOW RISK
0.1 MI N OF JCT CSAH23
04 - CSAH 24
345
032+00.408
212.2
30.5
0 sq. ft. / 15%
0 sq. ft. / 10%
N/A
A - Open
ft.
ft.
Postings:List:
MINNESOTA BRIDGE INSPECTION REPORT
10/28/2016
Inspector: CO Bridge
BRIDGE 7221 CSAH 24 OVER VERMILLION RIVER
Unofficial Structurally Deficient N
NUnofficial Functionally Obsolete
Unofficial Sufficiency Rating 79.8
ELEMNBR ELEMENT NAME INSP. DATE QUANTITY
QTYCS 1
QTYCS 2
QTYCS 3
QTYCS 4REPORT TYPE
Reinforced Concrete Deck 09/07/2016 6472 SF 5825 0 647 012 Underwater
6472 SF 5825 0 647 0Migrated Values
Notes: [2015] Minor scaling in some water saturated areas.[2013] Map cracking below all poured deck joints with water saturation and leaching. Cracking and leaching at both hanger assembly areas.Slight cracks and leaching.
510 - Wearing Surfaces 999 SF 749 0 250 0
Notes: Top of Concrete Deck with Uncoated Rebar Notes: [2015] 4.5' by 1.5' area of exposed rebar span 3. Some concrete patches starting tospall. Few spalls have exposed reinforcement. Areas of delamination present around patches and spalls.[2013 Infrared Deck Inspection] Found numerous delaminations scattered across the entire surface. Many deck patches were no longereffective. A rough estimate of percent unsound deck would be 15% to 20%.[2013] Many spalls repaired with concrete, others with bituminous. Deck at joints show much cracking and spalling with patches. Rust stainingof concrete noticed on Span 1.Minor spalls.Quite a few repaired areas.Some spall repairs are popped out.Deck spalls are in need of repair.
Underwater 09/07/2016
999 SF 749 0 250 0Migrated Values
Steel Open Girder/Beam 09/07/2016 848 LF 144 704 0 0107 Underwater
848 LF 144 704 0 0Migrated Values
Notes: [2015] Paint is starting to flake on bottom flange of interior beams with isolated surface corrosion. Top of bottom flange of fascia beamshas paint failure with surface corrosion present, but no flaking rust is present.[2013] Paint failing on all of the beams for most of their lengths. Beams at assembly joints show slight section loss and pitting. Beams havebeen painted previously but is now failing with surface rust the top of the bottom flanges of most beams.
515 - Steel Protective Coating 999 SF 169 0 481 349
Notes: [2016] Migrator assumed quantity of 999 SF and estimated the condition states.
Underwater 09/07/2016
999 SF 170 0 481 349Migrated Values
Steel Pin and Pin & Hanger Assemblyor both
09/07/2016 8 EA 0 8 0 0161 Underwater
8 EA 0 8 0 0Migrated Values
Notes: [2015-2013] Pin and hanger assemblies show minor surface corrosion and paint oxidation. Ultrasonic examination of pins showed nocracks.
515 - Steel Protective Coating 999 SF 0 0 999 0
Notes: [2016] Migrator assumed quantity of 999 SF and estimated the condition states.
Underwater 09/07/2016
999 SF 0 0 999 0Migrated Values
Reinforced Concrete Column 09/07/2016 4 EA 0 4 0 0205 Underwater
4 EA 0 4 0 0Migrated Values
Notes: [2015] Light scale with 0.25" penetration throughout with some areas having 0.5" from waterline down.[2013] Scaling at wetted perimeter.
Page 8 of 15
Reinforced Concrete Abutment 09/07/2016 102 LF 102 0 0 0215 Underwater
102 LF 102 0 0 0Migrated Values
Notes: [2016] Migrator added 40 LF to abutment quantity to account for wingwalls (CS1:40 CS2:0 CS3:0 CS4:0).[2015] Hairline vertical cracking on north abutment spaced 4'.[2013] Minor cracking, scaling, and spalling.
Wingwall notes: [2015-2013] Minor spalls and cracks.
Reinforced Concrete Pier Cap 09/07/2016 62 LF 62 0 0 0234 Underwater
62 LF 62 0 0 0Migrated Values
Notes: [2015-2013] Minor cracks and scaling.
Strip Seal Expansion Joint 09/07/2016 112 LF 0 112 0 0300 Underwater
112 LF 0 112 0 0Migrated Values
Notes: [2015] All joints are still functioning but unable to drain due to gravel buildup.[2013] Joints are all filled with gravel and adjacent concrete is spalling and cracking.
Pourable Joint Seal 09/07/2016 224 LF 0 224 0 0301 Underwater
224 LF 0 224 0 0Migrated Values
Notes: [2015] Some sealant missing.[2013] Adjacent concrete is spalling and cracking.
Movable Bearing 09/07/2016 12 EA 8 4 0 0311 Underwater
12 EA 8 4 0 0Migrated Values
Notes: [2015] Masonry plate on bearings 1 and 4 on both abutments has flaking rust present. Other bearings have minor paint failure with littlesurface corrosion.[2013] Bearings have flaking or failing paint. South abutment bearings have heavy rust.Some expansion bearings are rusting.Maintenance of bearing recommended.
Fixed Bearing 09/07/2016 4 EA 2 2 0 0313 Underwater
4 EA 2 2 0 0Migrated Values
Notes: [2015] Some paint is flaking but there is little surface corrosion. More paint failure and surface corrosion on fascia bearings.[2013] Bearings have flaking or failing paint.
Metal Bridge Railing 09/07/2016 423 LF 0 423 0 0330 Underwater
423 LF 0 423 0 0Migrated Values
Notes: [2015-2013] Chalking of protective coating.Metal Posts w/ Metal Channel Rail.4 bolts missing W. rail
515 - Steel Protective Coating 999 SF 999 0 0 0
Notes: [2016] Migrator assumed CS1 and a quantity of 999 SF.
Underwater 09/07/2016
999 SF 999 0 0 0Migrated Values
Critical Deficiencies or Safety Hazards 09/07/2016 1 EA 1 0 0 0800 Underwater
1 EA 1 0 0 0Migrated Values
Notes: [2015-2013] No critical findings during this inspection.
Concrete Decks - Cracking & Sealing 09/07/2016 0 LF 0 0 0 0810 Underwater
0 LF 0 0 0 0Migrated Values
Notes: [2015] 1/16" deck cracks spaced 5' to 10' throughout deck.[2013] Cracks are of minor size but moderate density around deck joints.
Bituminous Approach Roadway 09/07/2016 2 EA 0 2 0 0822 Underwater
2 EA 0 2 0 0Migrated Values
Notes: [2015-2013] Both approaches are spalled with deteriorated patches.
ELEMNBR ELEMENT NAME INSP. DATE QUANTITY
QTYCS 1
QTYCS 2
QTYCS 3
QTYCS 4
BRIDGE 7221 CSAH 24 OVER VERMILLION RIVER
REPORT TYPE
Page 9 of 15
Secondary Members (Superstructure) 09/07/2016 45 EA 0 45 0 0855 Underwater
45 EA 0 45 0 0Migrated Values
Notes: [2015-2013] Paint chalking and beginning to flake.Intermediate Diaphragms.
Steel Section Loss 09/07/2016 1 EA 1 0 0 0881 Underwater
1 EA 1 0 0 0Migrated Values
Notes: [2015-2013] Beam ends at the hanger assemblies show pitting which has been arrested from paint. Isolated flaking rust in otherlocations.
Concrete Shear Cracking 09/07/2016 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 09/07/2016 1 EA 1 0 0 0885 Underwater
1 EA 1 0 0 0Migrated Values
Notes: [2015] Minor scour around pier columns that are of little concern to the structural integrity of the bridge.
Other Bridge Signing 09/07/2016 1 EA 1 0 0 0891 Underwater
1 EA 1 0 0 0Migrated Values
Notes: [2015] All signs present with no deterioration.[2013] Delineators.
Slopes & Slope Protection 09/07/2016 2 EA 2 0 0 0892 Underwater
2 EA 2 0 0 0Migrated Values
Notes: [2015-2013] Slope below S abutment has eroded slightly.Riprap
Guardrail 09/07/2016 1 EA 1 0 0 0893 Underwater
1 EA 1 0 0 0Migrated Values
Notes: [2015] No notable impact damage.[2013] Flex Beam w/ "Boxing Glove" ends.
Deck & Approach Drainage 09/07/2016 2 EA 0 2 0 0894 Underwater
2 EA 0 2 0 0Migrated Values
Notes: [2015] Gravel along curbs affecting flow to drains. Spalls in deck holding water. Gravel in strip seal joints not allowing water to drain.[2013] Lots of gravel built up under guard rail.Gravel on deck needed to be removed.
Sidewalk, Curb, & Median 09/07/2016 1 EA 1 0 0 0895 Underwater
1 EA 1 0 0 0Migrated Values
Notes: [2015-2013] SE corner damaged. Curb below bridge rail at poured deck joints is spalled and deteriorated.
Protected Species 09/07/2016 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: SLC District 3Inspected by: [2015] CG, TM : [2013] BH, JDO[2013] Snooper truck used.
58. Deck NBI:
36A. Brdg Railings NBI:
36B. Transitions NBI:
[2015] 4.5' by 1.5' area of exposed rebar span 3. Some concrete patches starting to spall. Few spalls have exposedreinforcement. Areas of delamination present around patches and spalls. No full depth failures imminent.[2013] Many potholes in deck remain with bit patching. Many potholes patched with concrete. Concrete degradation locatedat all deck joints at top and bottom of deck with map cracking, leaching, minor to moderate spall/delam, and water saturation.Rust staining of concrete noticed at top of deck and under deck at span 1
ELEMNBR ELEMENT NAME INSP. DATE QUANTITY
QTYCS 1
QTYCS 2
QTYCS 3
QTYCS 4
BRIDGE 7221 CSAH 24 OVER VERMILLION RIVER
REPORT TYPE
Page 10 of 15
ELEMNBR ELEMENT NAME INSP. DATE QUANTITY
QTYCS 1
QTYCS 2
QTYCS 3
QTYCS 4
BRIDGE 7221 CSAH 24 OVER VERMILLION RIVER
REPORT TYPE
Inspector's Signature Reviewer's Signature
Inventory Notes:
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] Paint is starting to flake on bottom flange of interior beams with isolated surface corrosion. Top of bottom flange offascia beams has paint failure with surface corrosion present, but no flaking rust is present. Masonry plate on bearings 1 and 4on both abutments has flaking rust present.[2013] Beam ends at hanger assemblies who some areas of flaking rust and pitting of steel. Pitting has been painted over andarrested
[2015-2013] Minor spalling and scaling throughout with minor cracks. Slight erosion to the S abutment.
[2015] Banks are protected but minor scour holes present around pier columns.
[2015] High water mark half way up pier caps indicating about 3' or more of freeboard during high water.
[2015] No sight distance issues or speed reduction required.
Page 11 of 15
Photo 1 - Upstream Fascia, Looking Southwest
Photo 2 - Downstream Fascia, Looking Northeast
Pictures
Page 12 of 15
Pictures
Photo 3 - Pier 1, Looking North
Photo 4 - Pier 2, Looking South
Page 13 of 15
N
UNDERWATER BRIDGE INSPECTION
DEPARTMENT OF TRANSPORTATION
MINNESOTA
SOUNDING PLAN
Flo
w
South Abutment North AbutmentPier 1 Pier 2
(Typ.)
Shoreline
Legend
-7.0
Vermillion River
64'-0" 80'-0" 64'-0"
-5.2 -5.5 -6.0 -6.1-7.2
-4.9
-5.2 -5.2 -5.7 -4.9 -4.2
-7.4-7.1
-7.5 -7.5 -7.8 -7.8
Scour Depression
2
1
3
5
1
3
5 4
4
4
123 North Wacker Drive
Suite 900
Chicago, Il. 60606
(312) 704-9300
www.collinsengr.com
DRAWN BY: PRH
INSPECTION AND SOUNDING PLAN
-6.4-5.4
-4.9 -5.4
-6.9
-5.2 -5.6 -5.4-6.9
-4.9 -4.6
-6.9-6.1
-5.0-5.6-5.6
-5.9-5.2
-5.9-5.9
-6.2-4.1
-2.0 -1.9
-0.4 -3.9
-4.0
-4.0Sounding Depth from Waterline (6/19/16)Sounding Depth from Waterline (6/22/12)
All soundings are based on 2016 waterline location.
Notes:
DATE: JUNE 19, 2016
-2.1
-2.4 -2.0
-1.9
-8.6
CHECKED BY: LJ
CODE: 96877221
SCALE: NTS
FIGURE NO.: 1
OF PIERS
TYPICAL END VIEW
intervals between the substructure units.
Soundings were taken parallel to the bridge at 1/4 point4.
and are measured in feet.
Soundings indicate the water depth at the time of inspection3.
waterline elevation of 1209.4 based on design drawings.
at the upstream end of Pier 2. This corresponds to a
located approximately 7.1 feet below the top of the pier cap
At the time of inspection on June 19, 2016 the waterline was2.
Piers 1 and 2 were inspected underwater.1.
GENERAL NOTES:
were observed at the downstream columns of Piers 1 & 2.
scour depressions, 6 feet in radius and up to 1 foot deep,
were observed at the upstream columns of Piers 1 & 2. Also,
Scour depressions, 6 feet in radius and up to 2 feet deep, 5
6 inches of probe rod penetration.
in diameter and smaller, sandy silt, and gravel with up to
Channel bottom material consisted of scattered rocks 2 feet 4
typical) at upstream and downstream columns of Piers 1 & 2.
channel bottom with a 1/2 inch maximum penetration (1/4 inch
Scaling was observed from 1.5 feet above the waterline to the 3
channel bottom across the upstream column of Pier 2.
diameter logs (approx. 10 feet long each), was located on the
A light accumulation of timber debris, consisting of two 6 inch2
deterioration present.
Overall, the concrete surfaces were sound with no significant 1
INSPECTION NOTES:
DISTRICT 1, ST. LOUIS COUNTY
CSAH 24 OVER THE VERMILLION RIVER
STRUCTURE NO. 7221
Page 14 of 15
UNDERWATER BRIDGE INSPECTION
DEPARTMENT OF TRANSPORTATION
MINNESOTA
FASCIA PROFILES
UPSTREAM AND DOWNSTREAM
UPSTREAM FASCIA PROFILE
DOWNSTREAM FASCIA PROFILE
Refer to Figure 1 for General Notes.
Note:
ShorelineShoreline
64'-0" 80'-0" 64'-0"
~ W. Abutment ~ E. Abutment~ Pier 2~ Pier 2
El. 1197.6
B/Footing
ShorelineShoreline
64'-0" 80'-0" 64'-0"
~ W. Abutment ~ E. Abutment~ Pier 2~ Pier 2
El. 1197.97
B/Footing
El. 1197.6
B/FootingEl. 1197.97
B/Footing
DRAWN BY: PRH
CHECKED BY: LJ
123 North Wacker Drive
Suite 900
Chicago, Il. 60606
(312) 704-9300
www.collinsengr.com
W.L. El. 1209.4
W.L. El. 1209.4
FIGURE NO.: 2
DATE: JUNE 19, 2016
on 6/22/12
Channel Bottom
on 6/22/12
Channel Bottom
on 6/19/16
Channel Bottom
CODE: 96877221
SCALE: 1"=20'-0"
1220.0
1200.0
1180.0
1220.0
1200.0
1180.0
1220.0
1200.0
1180.0
on 6/19/16
Channel Bottom
1220.0
1200.0
1180.0
DISTRICT 1, ST. LOUIS COUNTY
CSAH 24 OVER THE VERMILLION RIVER
STRUCTURE NO. 7221
Page 15 of 15