bridge # msas 109(bridge) over straight river · nbr element name insp. date quantity qty cs 1 qty...

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:

74539

MSAS 109(BRIDGE) over STRAIGHT RIVER

District 6 Steele Owatonna

05/25/2016

Owens, Garrett; Stuber, Cory

Cory Stuber

City or Municipal Highway AgencyOwner:

MinnesotaSTATE:

UNDERWATER SUMMARY 3

UNDERWATER INSPECTION 4

UNDERWATER INSPECTION PROCEDURES 6

STRUCTURE INVENTORY 7

ELEMENTS 8

PICTURES 11

DRAWINGS 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 below water at Bridge No. 74539, Piers 1 and 2 and the East Abutment, were found to be in good condition. The concrete was generally smooth and sound with random minor vertical cracking noted along the pier shafts and the abutment breastwall. A localized scour depression was located at the upstream nose and extended to the upstream quarter of Pier 2. There was also a light to moderate accumulation of timber debris at the upstream nose of Pier 2.

(A) The channel bottom consisted of silty sand and 2 foot diameter and smaller rock with up to 3 inches of probe rod penetration at Pier 1.

(B) The channel bottom consisted of 2 foot diameter and smaller rocks and gravel with soft silt infilling at Pier 2.

(C) Random vertical hairline to 1/32 inch wide cracks were observed along the concrete pier shafts.

(D) Random vertical hairline to 1/16 inch wide cracks were observed along the East Abutment breast wall.

(E) A 2 foot deep scour depression was observed at the upstream nose of Pier 2 and extending to the upstream quarter point.

INSPECTION FINDINGS

Page 3 of 15

The top of the pier shaft at the north end of Pier 1.Water Level Reference:

WATERLINE DATUM

Waterline Elevation (feet):

The waterline was approximately 10.2 feet below reference.Description:

1123.8

4.

Piers 1 and 2 and the East Abutment.Substructure(s) Inspected:

SUBSTRUCTURE INSPECTION DATA

General Shape:

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

Piers consist of oblong rectangular shafts with rounded ends and are supported by steel H-piles encased in the concrete shafts. The abutment consists of a vertical breastwall with skewed wingwalls.

Code:Item 62: Culvert:

7

Y 48 05/2016 Code: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:

MSAS 109(BRIDGE)

County:

The superstructure consists of a three-span continuous concrete structural slab that is 22 inches thick at the midspans and 37 inches thick at the haunches (over the substructure units). The bridge is supported by two reinforced concrete abutments and two reinforced concrete piers. The piers are numbered 1 and 2 from west to east.

Bridge Description:

074 - Steele

Facility Carried:

BRIDGE DATA1.


Bridge #:

STRAIGHT RIVER Feature Intersected:

74539

Underwater Visibility (feet):

Sunny, 70o FWeather Conditions:

0.5

3.

1.0 Waterway Velocity (ft/sec):

05/25/2016

Professional Engineer/Team Leader:

INSPECTION DATA2.

Cory, R. Stuber, P.E.

Date of Underwater Inspection:

Garrett R. Owens, P.E.Inspection Diver:

Page 4 of 15

Scour 1885 EA 1

210 Reinforced Concrete Pier Wall 113 13LF 100

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

215

CS3 CS4

Reinforced Concrete Abutment 60 1070 LF

CS2ELEM # Unit CS1Element Description Quantity

Page 5 of 15

The routine underwater inspection of Bridge 74539 (MSAS 109 over the Straight River) was completed on May 25, 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 Piers 1 and 2 and the East Abutment. According to the bridge inventory or design drawings, Piers 1 and 2 were founded on steel H-piles encased in the concrete shafts. The abutment consists of a vertical breastwall with skewed wingwalls. 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 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


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 Y 60Culvert Type 3 - FTG PILE

Pinned Asbly. N

05/25/2016

Barrel Length

153.1 ft. Navigation Control

Waterway Opening (sf.) 1537Structure Length

ft. Year Painted

0 - No nav. control on waterwayDeck Width (Out-to-Out) 66.3

+ P A I N T +

APPR: 0 TOTAL:5 - Not eligible

MAIN: 3

Main Span Length 62.0 ft.Drainage Area (sq. mi.) 197.0

B R I D G E D A T A +Main Span Detail

N - NOT REQUIRED+ M I S C.

Appr. Span Type Structure Flared

GR Termini N - NOT REQUIRED

Appr. Guardrail

Main Span Type 2 - Concrete Continuous Median Width On Bridge

ft. Bridge Railing 1 - MEETS STANDARDS

N - NOT REQUIRED

Main Span Design 09 - Slab Span

ft. GR Transition

Skew 30 RIGHT

Y/N Freq Date

NAbutment 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 04/07/20147965 sq. ft. Traffic

ft. 50B. Rt 6.00Sidewalk Width 50A. Lt 6.00

Roadway Area (Curb-to-Curb)

Posted Load 0 - Not Required

PostingStructure Area (Out-to-Out) 10151 sq. ft.

DBL:VEH: SEMI:

Rt 28 ARail Type Lt 28 C N - N/AN - N/A B N - N/A

N - Not Applicable Overweight Permit CodesCurb Height Lt

ft. Horizontal 0 - Not Required

0.67 ft. Vertical0.67 ft. Rt

Wear Surf Install Year 1991

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.)Deck Material 1 - Concrete Cast-in-Place 0.0Wear Surf Type 4 - Low Slump Concrete

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 25.0

49.0Deck Rebars Install Year 1991

Deck Rebars

Finish TypeWear Course/Fill Depth 0.17 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

44 5

Inspector Name Stuber, Cory

Latitude Control Section (TH Only) Status' 3.39 ''

2 - 2-way traffic

Routine Inspection Frequency 24

Sect., Twp., Range

0.8 MI E OF JCT TH 14 Level of Service 1 - MAINLINE

- 20W Roadway Type9 - 107N

Detour Length 1.0 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 N13 '

A - Open

Longitude 93 002+00.395 + N B I 49.52 '' Reference Point

Crew

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

Agency Br. No. 183

District 06

Bridge Match ID (TIS) 0 Userkey

MSAS 109(BRIDGE) over STRAIGHT RIVER

Minnesota Structure Inventory Report

Bridge ID: 74539

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

Date: 08/30/2016

Sufficiency Rating 81.3Roadway Name or Description

109

City Owatonna

Routine Inspection Date 04/15/2015

Desc. Loc.

Township Bridge St. (MSAS 109)

Number

NRoadway O/U Key Route On StructureMaint. Area 6B Structurally Deficient

NRoute Sys 05 - MSASCounty 074 - Steele Functionally Obsolete

Lanes

Waterway Adequacy 9Max. Vert. Clear.

ft.Legislative District 26Aft.Potential ABC 2 - N/A ft.

ft.On - Off System Roadway Width 52.00 ft.

Vertical Clearance ft.1 - ON

Underclearances N

Service On 5 - Highway-pedestrian Appr. Surface Width+ S A F E T Y F E A T U R E S +

5 - Waterway Bridge Roadway Width 52.0

52.0 ft.

Service Under

ft.

51.9 ft. Approach Alignment 8Horizontal Clear.

ft.

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

HCADT ADTT7

Year Built 1991

MN Year Reconstructed Functional Class

%Channel 7

Substructure

0Superstructure 6

ON 4 UNDER

14641 YEAR 2008BMU Agreement ADT

Structure Evaluation 6If Divided

D I M E N S I O N S +Bridge Plan Location 4 - MUNICIPAL

11/1/1991Deck Geometry 4

NB-EB SB-WBDate Opened to Traffic

+ R D W Y

FHWA Year Reconstructed

MN Temporary Status

14 - Urban - Other Principal Arterial Culvert 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:

Steele

Owatonna

107N9 20W

2 - Concrete Continuous 1 - Slab

6 6 7 7 N

8 9

0 - Not Required

0 - Not Required

0 - Not Required

N - Not Applicable

N - STBL - LIM SCOUR

0.8 MI E OF JCT TH 14

05 - MSAS 109 002+00.395

6B

153.1

66.3

7965 sq. ft. / %

sq. ft. / %

N/A

A - Open

ft.

ft.

Postings:List:

MINNESOTA BRIDGE INSPECTION REPORT

09/09/2016

Inspector: CO Bridge

BRIDGE 74539 MSAS 109(BRIDGE) OVER STRAIGHT RIVER

Unofficial Structurally Deficient N

NUnofficial Functionally Obsolete

Unofficial Sufficiency Rating 81.3

ELEMNBR ELEMENT NAME INSP. DATE QUANTITY

QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4REPORT TYPE

Reinforced Concrete Slab 05/25/2016 10151 SF 9948 0 203 038 Underwater

10151 SF 9948 0 203 0Migrated Values

Notes: There are numerous diagonal, transverse, and longitudinal cracks with leaching. There are three transverse cracks that run the fullwidth of the slab in span 2. [2013] - 8"x8" spall at the NW corner of span 1. [2015] - no change

510 - Wearing Surfaces 7965 SF 7806 0 159 0

Notes: Concrete Slab with Cathodic Protection System Notes: Mn/DOT's Owatonna Bridge Crew sealed all of the deck cracks in 2003. Thereare numerous diagonal, transverse, and longitudinal cracks with leaching. There are three transverse cracks that run the full width of the slabin span 2. There is a 6" x 10" spall along the north curb west end of the deck near the strip seal. [2015] - 12"x12" spall in the EBL 50' to theeast of the west end of the slab.

Underwater 05/25/2016


Reinforced Concrete Pier Wall 05/25/2016 113 LF 100 13 0 0210 Underwater

113 LF 100 13 0 0Migrated Values

Notes: Pier 1 - Seven full height vertical cracks in the pier wall. [2015] - no changePier 2 - Six full height vertical cracks with staining. No spalls or exposed reinforcement. [2015] - no change

Reinforced Concrete Abutment 05/25/2016 181 LF 121 60 0 0215 Underwater


Notes: [2016] Migrator added 40 LF to abutment quantity to account for wingwalls (CS1:0 CS2:40 CS3:0 CS4:0).West Abutment - there are nine full height vertical cracks in the abutment. No spalls or exposed rebar.East Abutment - there are seven full height vertical cracks in the abutment. No spalls or exposed rebar.[2013] - surface treatment is failing on both abutments. [2015] - no change

Wingwall notes: NW Wingwall - there are two vertical cracks with leaching. {2015] - no changeNE Wingwall - there are two vertical cracks with leeching. [2013] - 1 diagonal crack at the abutment [2015] - no changeSE Wingwall - the cork joint between the wingwall and abutment is deteriorating. There is one short diagonal crack. [2013] - There are fourshort diagonal cracks. [2015] - no changeSW Wingwall - there is a diagonal crack at the corner of the bridge seat. [2015] - no change

Reinforced Concrete Pier Cap 05/25/2016 121 LF 119 2 0 0234 Underwater


Notes: Minor vertical cracks near center of both pier caps. [2015] - no change

Strip Seal Expansion Joint 05/25/2016 114 LF 114 0 0 0300 Underwater


Notes: The strip seals were full of dirt and debris, however there were no signs of leakage at the bridge seat. [2015] - no change

Page 8 of 15

Pourable Joint Seal 05/25/2016 570 LF 560 10 0 0301 Underwater


Notes: West Approach Joint - there is 14 linear feet of loss of adhesion across the joint. There is a 6" spall at the northwest end of the joint.[2015] - no change

East Approach Joint - there is 14 linear feet of loss of adhesion across the joint. [2015] - no change

Elastomeric Bearing 05/25/2016 20 EA 20 0 0 0310 Underwater

20 EA 20 0 0 0Migrated Values

Notes: The elastomeric bearings are located at the abutments and are functioning as intended. [2015] - no change

Reinforced Concrete Approach Slab 05/25/2016 2080 SF 0 2080 0 0321 Underwater


Notes: [2016] Migrator assumed an approach slab length of 20FT and used the inventory quantity of 52FT for the width.East End - there are four full length cracks in the approach panel. There are no signs of settlement. [2015] - no change

West End - there are four full length cracks and one transverse crack in the approach panel. There are no signs of settlement. [2015] - nochange

Metal Bridge Railing 05/25/2016 351 LF 289 62 0 0330 Underwater


Notes: [2016] Migrator assumed concrete/metal combination type rail.The railing consists of solid concrete rail with painted steel rail on top. There are scattered vertical cracks with rust staining in the concrete railsections. The steel railing has scattered scrapes and chips in the paint with small areas of surface corrosion. [2013] - 1 bolt is missing on thenorth side, 4th section from the west. [2015] - no change

515 - Steel Protective Coating 999 SF 999 0 0 0

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

Underwater 05/25/2016


Reinforced Concrete Bridge Railing 05/25/2016 351 LF 289 62 0 0331 Underwater


Notes: [2016] Migrator assumed concrete/metal combination type rail.The railing consists of solid concrete rail with painted steel rail on top. There are scattered vertical cracks with rust staining in the concrete railsections. The steel railing has scattered scrapes and chips in the paint with small areas of surface corrosion. [2013] - 1 bolt is missing on thenorth side, 4th section from the west. [2015] - no change

Critical Deficiencies or Safety Hazards 05/25/2016 1 EA 1 0 0 0800 Underwater


Notes: [2015] - No critical findings were observed during this inspection.

Concrete Decks - Cracking & Sealing 05/25/2016 0 LF 0 0 0 0810 Underwater


Notes: Mn/DOT's Owatonna Bridge Crew sealed all of the deck cracks in 2003. The majority of the cracks have reopened. [2015] - cracks areunsealed.

Plow Fingers 05/25/2016 1 EA 0 1 0 0815 Underwater


Notes: There are ten missing plowstraps on the west end of the bridge. [2015] - no change

Scour 05/25/2016 1 EA 0 1 0 0885 Underwater

Notes: [2016] Underwater Inspection - A 2 foot deep scour depression was observed at the upstream nose of Pier 2 and extending to theupstream .

Slopes & Slope Protection 05/25/2016 1 EA 1 0 0 0892 Underwater


Notes: All of the slopes are well protected. [2015] - no change


QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4


REPORT TYPE

Page 9 of 15

Deck & Approach Drainage 05/25/2016 1 EA 1 0 0 0894 Underwater


Notes: The deck drainage system is functioning as intended. [2015] - no change

Sidewalk, Curb, & Median 05/25/2016 1 EA 0 1 0 0895 Underwater


Notes: Mn/DOT's Owatonna Bridge Crew sealed all of the sidewalk cracks in 2003. There is a 6" x 10" delaminated area in the curb at the NWcorner adjacent to the strip seal joint. [2013] - The majority of cracks have reopened. [2015] - SE corner of rail/sidewalk has a minor area oferosion.

Miscellaneous Items 05/25/2016 1 EA 1 0 0 0899 Underwater


Notes: There are no swallow nests on the bridge. There is a utility line firmly attached to the face of the east abutment and along the southeastwingwall. This line continues along the north side of the slab and goes underground at the end of the northwest wingwall. The utility cover plateis broken off at the northwest corner behind the rail post. [2015] - no change

Protected Species 05/25/2016 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

Cory Stuber

Inventory Notes:

After the flooding of September 2010, BR74539 was inspected for evidence of flood related damage. No significant floodrelated issues were found.

Channel - NBI 7 Minor bank erosion both sides of the bridge.

[2011] - inspected by Steve Miller and Robert Pyfferoen. (snooped)[2013] - inspected by Tom Miles[2015] - inspected by Aaron Forthun

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] - moderate cracking with minor spalling

[2015] - moderate cracking

[2015] - minor cracking

[2015] - minor bank erosion

[2015] - no speed reduction required


QTYCS 1

QTYCS 2

QTYCS 3

QTYCS 4


REPORT TYPE

Page 10 of 15

Photo 1 - Typical View of South Elevation, Looking North

Photo 2 - Typical View of North Elevation, Looking South

Pictures

Page 11 of 15

Pictures

Photo 3 - Typical View of Pier 1, Looking North

Photo 4 - View of East Abutment, Looking Northeast

Page 12 of 15

Pictures

Photo 5 - View of West Bank, Looking North

Page 13 of 15

Figure No.: 1

Scale: NTS

Legend

UNDERWATER BRIDGE INSPECTION

DEPARTMENT OF TRANSPORTATION

MINNESOTA

INSPECTION AND SOUNDING PLAN

TYPICAL END VIEW OF EACH PIER SECTION

Timber Debris

46'-0"

West

Abutm

ent

East

Abutm

ent

Pier 1

Pier 2

2

2

3

2

3

1Flo

w

River

Straig

ht

SOUNDING PLAN

62'-0" 46'-0"N

4

-0.4

-0.4

Date: June, 2016Drawn By: BGDO

Checked By: BRL

Sounding Depth (5/25/16)

-2.6

-2.6

-2.0

-2.5

-2.3

-2.2 -

3.4

-3.5

-3.2

-3.0

-4.1

-3.0

-1.6

-5.4

-4.3

-3.0

-1.6

-0.4-0

.7-1.2-1

.4-1.7-1

.1

-2.9

-4.2

-4.4

-3.7

-5.3

-4.0

-2.0

-6.4

-2.9

-4.3

-1.1

-1.7

-1.5

-1.5

-1.4

-1.2

5

CITY OF OWATONNA, STEELE COUNTY

MSAS 109 OVER THE STRAIGHT RIVER

STRUCTURE NO. 74539

Project: 63-9687

Sounding Depth (9/12/12)

1599 Selby Avenue

Suite 206

St. Paul, MN, 55104

(651) 646-8502

www.collinsengr.com

-1.8

-0.6

-0.5

-0.7

substructure units as well as around the pier structures.

Soundings were taken parallel to the bridge at 1/4 point intervals between the4.

in feet.

Soundings indicate the water depth at the time of inspection and are measured 3.

This corresponds to a waterline elevation of 1123.8 feet.

approximately 10.2 feet below the top of shaft at Pier 1 on the upstream end.

At the time of inspection, on June 25, 2016 the waterline was located2.

The East Abutment and Piers 1 and 2 were inspected underwater. 1.

GENERAL NOTES:

Shorline (Typ.)

-3.5

-.-

-.-

-0.8

-5.4

-.-

-5.0

-.-

-2.4

-.-

-4.5

-.-

extended to the upstream 1/4 of Pier 2.

2 foot deep scour depression was observed at the upstream nose and 5

East Abutment breast wall.

Random vertical hairline to 1/16 inch wide cracks were observed along the 4

concrete pier shafts.

Random vertical hairline to 1/32 inch wide cracks were observed along the 3

with soft silt infilling at Pier 2.

The channel bottom consisted of 2 foot diameter and smaller rocks and gravel 2

rock with up to 3 inches of probe rod penetration at Pier 1.

The channel bottom consisted of silty sand and 2 foot diameter and smaller 1

INSPECTION NOTES:

Top of Shaft

10.2

Page 14 of 15

UPSTREAM FASCIA PROFILE

DOWNSTREAM FASCIA PROFILE

Figure No.: 2

UNDERWATER BRIDGE INSPECTION

DEPARTMENT OF TRANSPORTATION

MINNESOTA

UPSTREAM AND DOWNSTREAMFASCIA PROFILES

Scale: 1"=20'

Refer to Figure 1 for General Notes.

Note:

~ Brg. West Abutment ~ Brg. East Abutment

~ Pier 2~ Pier 1

W.L. El. 1123.8

1140

1120

1100

1160

1140

1120

1100

1160

~ Brg. West Abutment ~ Brg. East Abutment

~ Pier 2~ Pier 1

1140

1120

1100

1160

1140

1120

1100

1160

W.L. El. 1123.8

46'-0" 62'-0" 46'-0"

46'-0" 62'-0" 46'-0"

El. 1113.20 El. 1113.75

El. 1113.20 El. 1113.75

El. 1113.75

El. 1114.00

El. 1114.00

Date: JUNE, 2016Drawn By: BGDO

Checked By: BRL

on 9/12/12

Channel Bottom

on 9/12/12

Channel Bottom

CITY OF OWATONNA, STEELE COUNTY

MSAS 109 OVER THE STRAIGHT RIVER

STRUCTURE NO. 74539

Shoreline

Shoreline

Shoreline

Project: 63-9687

1599 Selby Avenue

Suite 206

St. Paul, MN, 55104

(651) 646-8502

www.collinsengr.com

on 5/25/16

Channel Bottom

Shorelineon 5/25/16

Channel Bottom

Page 15 of 15

CoverTable of ContentsUnderwater SummaryUnderwater InspectionUnderwater Inspection ProceduresStructure InventoryElementsPicturesDrawings

bridge # msas 109(bridge) over straight river · nbr element name insp. date quantity qty cs 1 qty...

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