B.08.02_Underwater_Component_Inspection_Report_.pdf

Contract 27975 – Water Control Structure Underwater Inspection: S – 252D Culvert Underwater

UW-1

S-252D Inspection Underwater Component

1. Underwater Inspection Summary & Recommendations

The underwater inspection was led by Mary Ellen Maurer, P.E., of Infrastructure Engineers on February 3, 2015.

The Overall Inspection Rating – Underwater Component:

C-3: There are nine C-3 deficiencies that need monitoring.

1. The pipe culvert has up to 100% coating failure and moderate corrosion with flaking up to 1/16” throughout.

2. The barrel ends have knife edging.

3. Perforations are present at the pipe ends, up to 3’ long by 2’ wide.

4. The gate coating is failing and areas of light surface corrosion up to 1” in diameter are present.

5. The staff gauge and hardware have surface corrosion, pitting up to 1/16”, and section loss up to 1/16”.

6. The steel cross beams beneath the stilling well walkway have corrosion, coating failure and minor pitting up to 1/32”.

7. The timber walkway hardware has corrosion and up to 30% section loss.

8. The steel cross bracing hardware has moderate corrosion and up to 10% section loss.

9. The top of the barrel on the west side, behind the gate has corrosion and perforations up to 1/4” in diameter.

UW-2

Explanation of Recommendations – Underwater Component:

1. US51/DS 51/US 114/US115/DS115/US 151, C-3: Clean and coat all corroded areas.

2. US51/DS 51/ US115/DS115, C-3: Repair/replace knife edged areas.

3. US51/DS 51/ US115/DS115, C-3: Repair/replace perforated areas.

4. US 151, C-3: Clean gate of corrosion and coat.

5. US 60/DS 60, C-3: Clean and coat corroded areas of staff gauge.

6. US 114, C-3: Clean and coat steel cross bracing.

7. US 59, C-3: Clean and coat timber walkway hardware.

8. US 59, C-3: Clean and coat steel bracing connection hardware.

9. US 51, C-3: Clean and coat corroded areas of barrel, repair/replace perforations.

Approach:

The recommendations above may require dewatering.

UW-3

2. Water Elevations

During the underwater inspection, the water elevations were as follows:

Headwater = 26.25’ NGVD Tailwater = 26.1’ NGVD

3. Project Team

The underwater inspection team was led by Mary Ellen Maurer, P.E. The project personnel, their organization, and their responsibilities are as follows:

Individual Company Role Responsibilities

Mary Ellen Maurer, P.E. Infrastructure Engineers Inc.

Professional Engineer

Oversee team & work products

Taylor White, E.I.,C.B.I. Infrastructure Engineers Inc.

Dive Supervisor Monitor diver & dive equipment

Kyle Rankin, C.B.I. Infrastructure Engineers Inc.

Diver 1 Perform dive inspection

Bill Gehry Infrastructure Engineers Inc.

Diver 2 (standby) Standby for dive inspection

David Stump Jr.,E.I. Infrastructure Engineers Inc.

Dive Tender Tend to lines for diver

Bumpy Courson Florida Trophy Gator

Alligator Trapper Provide protection for diver

Melissa Courson Florida Trophy Gator

Alligator Trapper Provide protection for diver

UW-4

4. Rating Scales

Rating Scale used for the Overall Structure Rating

The overall structure is rated from C-1 to C-5 Critical, based on the impact and extent of the deficiencies, and on the timeframe and involvement of the recommended corrective actions.

Overall Rating

Description for the Overall Structure Application

C1 All old deficiencies noted from the previous inspection have been corrected.

Applied when no further action is recommended for the structure.

C2 Most old deficiencies noted from the previous inspection have been corrected.

Applied when the overall recommendation is to monitor minor deficiencies. Deficiencies will generally be re-evaluated at the next five-year inspection of the structure.

C3 Deficiencies have been identified and/or several old deficiencies noted in the last inspection have not been corrected.

Applied when the overall recommendation is to correct deficiencies.

C4 Serious deficiencies exist that if not immediately corrected may lead to or cause deterioration of the structure.

Applied when the overall recommendation is to correct serious deficiencies that if not corrected in a timely manner will impact the operation of the structure.

C5 Major deficiencies exist such that the structural integrity of the structure will not likely withstand a major flood event.

Applied when the overall recommendation is to correct major deficiencies as soon as possible to restore structural integrity.

C5 Critical

Emergency deficiencies exist that must be addressed immediately. Deficiencies include those that impede operation of the structure or jeopardize public safety.

Applied when immediate repairs are recommended in order to restore operational capability or address public safety issues.

Generally the District would respond by dispatching its Field Station personnel to triage the deficiency (e.g., block access to the structure, reduced structure operating capacity) until repairs can be performed. Responding District design engineers would be altered to fast-track repairs if triage does not ameliorate the deficiencies.

Rating Scale used for Individual Deficiencies for a Structure:

C-1 = No Deficiencies Noted

C-2 = Monitor condition at next dive inspection, in five (5) years.

C-3 = Schedule repair/replacement, for routine items.

C-4 = Schedule repair/replacement, for safety items, or items that will hinder operation if not corrected.

C-5 = Repair/replace immediately, for structural items.

C-5 Critical = Repair/replace immediately, for operational items.

UW-5

5. Site Drawing The location(s) are marked in RED for each deficiency, C-2 and higher, identified from the underwater inspection of the structure. A legend is provided in RED listing the unique item number, C-rating (from C-5 Critical down to C-2), finding number & finding name.

Legend Item C-

Rating Finding No.

Finding Name

1 C-3 US 51

DS 51

Pipe Coating Failure

2 C-3 DS 51 Knife Edging

3 C-3 US 51

DS 51

Corrosion and Flaking

4 C-3 US 51

DS 51

Perforations

Rating Finding No.

Finding Name

5 C-3 US 151 Gate coating failure and surface corrosion

6 C-3 US 60

DS 60

Staff gauge corrosion

7 C-3 US 114 Corrosion and pitting on bracing

Rating Finding No.

Finding Name

8 C-3 US 59 Section loss and corrosion timber hardware

9 C-3 US 51 Bracing hardware corrosion

UW-6

6. Detailed Inspection Log

Findings and recommendations for elements rated C-3 and higher are detailed below.

Checklist No.:

US51/DS 51 – Coating Failure and surface corrosion

C-Rating:

C-3

Photo Description:

Coating failure and surface corrosion with flaking

Deficiency: The pipe interior/exterior has 100% coating failure and moderate corrosion.

Probable Cause: This deficiency is most likely due to exposure to an aggressive environment.

Recommendation: Clean and coat

UW-7

US51/DS51–

Perforations/Knife edging

C-Rating:

C-3

Photo Description:

Perforations and knife edging on barrel.

Deficiency: The barrel ends have knife edging and perforations on the top portion of the barrel from the 10 o’ clock position to the 1 o’ clock position, up to 3’ long by 2’ wide.

Probable Cause: This deficiency is most likely due to exposure and wear.

Recommendation: Repair/replace barrel ends

UW-8

US 151 – Coating Failure and Corrosion

C-Rating:

C-3

Photo Description:

Coating failure and corrosion on gate.

Deficiency: The gate surface has less than 5% coating failure and corrosion up to 1” in diameter.

Probable Cause: This deficiency is most likely due to exposure to an aggressive

Recommendation: Clean and coat the affected areas.

UW-9

US 60/DS 60 -

Corrosion

C-Rating:

C-3

Photo Description:

Corrosion on staff gauge.

Deficiency: The staff gauges and hardware have moderate surface corrosion with pitting up to 1/16” and section loss up to 1/16”.

Probable Cause: This deficiency is most likely due to exposure to an aggressive

UW-10

US 114 – Corrosion and pitting

C-Rating:

C-3

Photo Description:

Corrosion and pitting on steel cross bracing.

Deficiency: The timber walkway steel cross bracing has coating failure, light surface corrosion, and pitting up to 1/32”

Probable Cause: This deficiency is most likely due to exposure to an aggressive

UW-11

US 59 – Section loss and Corrosion

C-Rating:

C-3

Photo Description:

Corrosion and section loss on timber hardware.

Deficiency: The stilling well timber walkway hardware has moderate surface corrosion and up to 30% section loss.

Probable Cause: This deficiency is most likely due to exposure to an aggressive

UW-12

US 51 – Corrosion

C-Rating:

C-3

Photo Description:

Corrosion on bracing hardware.

Deficiency: The timber walkway bracing hardware has moderate corrosion.

Probable Cause: This deficiency is most likely due to exposure to an aggressive

UW-13

US 51 – Corrosion and perforations

C-Rating:

C-3

Photo Description:

Corrosion and perforations.

Deficiency: The barrel area behind the gate has surface corrosion and perforations up to ¼” in diameter.

Probable Cause: This deficiency is most likely due to exposure to an aggressive

7. Underwater Inspection Checklist

Underwater Field Notes

Structure: Distance US inspected: 50 feet

Date(s): Distance DS inspected: 50 feet

Start Time(s): Headwater Elevation: 26.25 NGVD

Finish Time(s): Tailwater Elevation: 26.1 NGVD

Overall Structure Rating: 3

Underwater Summary:

UPSTREAM:

Checklist Finding # C-Rating

Video

Real

Time Deficiency Probable Cause

Recommended

Corrective

Actions

US1 Slope Degradation/Stability

No Deficiencies Noted null null

US2 Condition of Rip-Rap (Loose/Seated)

No Deficiencies Noted null null

US3 Exposed Erosion Control Fabric (C1 if not exposed)

No Deficiencies Noted null null

US4 Evidence of Stone Displacement (For bedding stone) N/A

None by Design null null

US5 Channel Stabilization and Erosion Control 1 No Deficiencies Noted null null

US50 Structure-General Concrete Condition (Out of all concrete members at the structure, state which ones have deficiencies, and which are fine)

N/A

None by Design null null

a. Concrete Chemical Reaction (Sulfate attack?)

N/A Null null null

b. Concrete Cracks N/A Null null null

c. Concrete Spalling (Is rebar exposed?)

N/A Null null null

d. Concrete Structural Integrity N/A Null null null

e. Exposed Rebar Corrosion N/A Null null null

f. Offset (relative movement of opposing sides) N/A Null null null

g. Scaling N/A

Null null null

h. Undermining N/A Null null null

US51 Structure-General Metal Condition (Out of all metal members at the structure, state which ones have deficiencies, and which are fine) 3 13:04:20/

14:04:50

The barrel has coating failure throughout, surface corrosion and flaking up to 1/16", as well as knife edging and perforations at the barrel ends.

Exposure to an aggressive environment

Clean and coat affected areas

S-252D

2/3/2015

Finding Name

Underwater-Upstream Erosion Control

Underwater-Upstream General

UW-13

Checklist Finding # C-Rating

Video

Real

Time Deficiency Probable Cause

Recommended

Corrective

ActionsFinding Name

Underwater-Upstream Erosion Control a. Corrosion

Moderate with flaking up to 1/16"

Exposure to an aggressive environment

Clean and coat affected areas

b. Offset (relative movement of opposing sides) N/A null null null

c. Section Loss

Up to 3'W by 2'L, 100% loss in isolated areas up to 20' from the barrel ends

Exposure to an aggressive environment

Repair

d. Undermining N/A null null null

US52 Structure-General Timber Condition (Out of all timber members at the structure, state which ones have deficiencies, and which are fine)

None by design null null

a. Offset (relative movement of opposing sides) N/A Null null null

b. Pile Caps N/A Null null null

c. Rot N/A Null null null

d. Splitting N/A Null null null

e. Undermining N/A Null null null

US53 Structural Joints (e.g. Bolts, Welds)

No Deficiencies Noted null null

US54 Stop Log/Flashboard Channels (Including stop logs & flashboards) N/A None by Design null null

US55 Settlement (Settlement of structure?) N/A None by Design null null

US56 Shoaling/Scour (Shoaling=deposit of mat'l; Scour=removal of mat'l) N/A

None by Design null null

a. Shoaling/Scour Depth and Dimensions N/A Null null null

b. Upstream Foundation/Headwall N/A Null null null

c. Upstream Headway (Shoaling) N/A Null null null

d. Wingwalls N/A Null null null

US57 Fouling/Marine Growth N/A

None by Design null null

a. Type, Consistency, Thickness N/A Null null null

US58 Debris N/A

None by Design null null

US59 Stilling Wells (If 'NA', Why?)

3 13:54:55

Moderate surface corrosion and section loss of timber hardware. Light surface corrosion, pitting, and coating failure on steel cross bracing.

Exposure to an aggressive environment

Clean and coat affected areas

a. Corrosion, Joint Damage N/A null null null

UW-14

Real

Time Deficiency Probable Cause

Recommended

Corrective

ActionsFinding Name

Underwater-Upstream Erosion Control b. General Condition N/A null null null

c. Stilling Well Pier-Connections N/A null null null

d. Stilling Well Pier-Support (Support posts)

Moderate surface corrosion and section loss of timber hardware. Light surface corrosion, pitting, and coating failure on steel cross bracing.

Exposure to an aggressive environment

Clean and coat affected areas

e. Stilling Well Intake Lines (Stilling well pipes) N/A null null null

US60 Underwater Controls/Instruments

3 13:48:10

Moderate surface corrosion on staff gauge steel mount and hardware, with pitting and section loss up to

1/16"

Exposure to an aggressive environment

Clean and coat affected areas

a. Fastening System in Suitable Condition

3 13:48:10

Moderate surface corrosion on staff gauge steel mount and hardware, with pitting and section loss up to

1/16"

Exposure to an aggressive environment

Clean and coat affected areas

b. Proper Location and Alignment N/A Null null null

US61 Fenders (Fenders for structure;

e.g. for boat locks) N/A None by Design null null

US100 Wingwalls N/A

None by Design null null

US101 Buttresses (Support arms for wall)

N/A None by Design null null

a. Alkali-Silica or Chemical Reaction of Concrete N/A Null null null

b. Construction Joint Condition N/A Null null null

c. Cracking (Type and Size) N/A Null null null

d. Erosion N/A Null null null

e. Offset/Faulting (Relative Movement of Opposing Sides) N/A Null null null

f. Reinforcement Corrosion N/A Null null null

g. Spalling or Pop out N/A Null null null

US102 Abutments (Abutment walls are parallel to the flow) N/A None by Design null null

US103 Retention Walls N/A

None by Design null null

US104 Headwall (Head walls are perpendicular to the flow) N/A

None by Design null null

US105 Expansion Joints/Construction Joints (Use here if deficiency is not associated with the components listed) N/A

None by Design null null

Underwater-Upstream Structural

Components

UW-15

Real

Time Deficiency Probable Cause

Recommended

Corrective

ActionsFinding Name

Underwater-Upstream Erosion Control US106 Sheet Piles and Bulkheads N/A

None by Design null null

a. Concrete Condition N/A Null null null

b. Concrete Pile N/A Null null null

c. Condition of Coating Products N/A Null null null

d. Corrosion N/A Null null null

e. Deadman Condition N/A Null null null

f. Joint or Knuckle Condition N/A Null null null

g. Pile Cap N/A Null null null

h. Sheet Pile N/A Null null null

i. Timber Pile N/A Null null null

j. Undermining N/A Null null null

US107 Wales/Tie Backs (hardware) (Used with sheetpile) N/A

None by Design null null

US108 Intake Bays N/A

None by Design null null

US109 Piers/Ballasts (Pier walls that separate the bays) N/A None by Design null null

US110 Foundations (Underneath the structure) N/A None by Design null null

US111 Weir/Weir Crest N/A

None by Design null null

a. Alkali-Silica or Chemical Reaction of Concrete N/A Null null null

b. Cracking (Type and Size) N/A Null null null

c. Erosion N/A Null null null

d. Offset/Faulting (Relative Movement of Opposing Sides) N/A Null null null

e. Reinforcement Corrosion N/A Null null null

f. Spalling or Pop out N/A Null null null

US112 Baffles N/A

None by Design null null

a. Alkali-Silica or Chemical Reaction of Concrete N/A Null null null

b. Construction Joint Condition N/A Null null null

c. Cracking (Type and Size) N/A Null null null

d. Erosion N/A Null null null

e. Offset/Faulting (Relative Movement of Opposing Sides) N/A Null null null

f. Reinforcement Corrosion N/A Null null null

g. Spalling or Pop out N/A Null null null

US113 Underwater Apron Slabs N/A None by Design null null

UW-16

Real

Time Deficiency Probable Cause

Recommended

Corrective

ActionsFinding Name

Underwater-Upstream Erosion Control US114 Structural Support, Bracing or Frames (For other structural components)

3 13:54:55

Moderate surface corrosion and section loss of timber hardware. Light surface corrosion, pitting, and coating failure on steel cross bracing.

Exposure to an aggressive environment

Clean and coat affected areas

a. Corrosion (Light, Moderate, Heavy)

Moderate Exposure to an aggressive environment

Clean and coat affected areas

b. Flaking, Peeling, Blisters N/A Null null null

c. Pitting

Moderate Exposure to an aggressive environment

Clean and coat affected areas

d. Protective Coating Condition

Moderate Exposure to an aggressive environment

Clean and coat affected areas

e. Section Loss

Moderate Exposure to an aggressive environment

Clean and coat affected areas

f. Surface Area (% Damaged) N/A Null null null

US115 Culverts Interior (Include exterior of culvert, if it can be seen)

3 14:04:50

The barrel has coating failure throughout, surface corrosion and flaking up to 1/16", as well as knife edging and perforations at the barrel ends.

Exposure to an aggressive environment

Clean and coat affected areas

US116 Risers (Culvert risers) N/A

None by design null null

US151 Gate Condition

3 13:30:10

The gate has less than

5% coating failure and corrosion up to 1" in diameter

Exposure to an aggressive environment

Clean and coat affected areas

a. Alignment, Indications of Bowing or Buckling N/A null null null

b. Cathodic protection anodes N/A null null null

c. Corrosion (Light, Moderate, Heavy)

The gate has less than

5% coating failure and corrosion up to 1" in diameter

Exposure to an aggressive environment

Clean and coat affected areas

d. Gate Anchorage N/A null null null

e. Gate seal condition 1 null null null

f. Greasers N/A null null null

g. Indications of Stress or Structural Deterioration N/A null null null

h. Operability N/A null null null

Underwater-Upstream Gates

UW-17

Real

Time Deficiency Probable Cause

Recommended

Corrective

ActionsFinding Name

Underwater-Upstream Erosion Control i. Pitting (% Penetration Into Metal) N/A null null null

j. Protective Coating Condition (Flaking, Peeling, Blisters)

The gate has less than

5% coating failure and corrosion up to 1" in diameter

Exposure to an aggressive environment

Clean and coat affected areas

k. Rivet, Weld Seam, or Bolt Condition N/A null null null

l. Section Loss N/A null null null

m. Surface Area (% Damaged) N/A null null null

US152 Gate Guides and Gate Control (Includes rails and, depending on type of gate, roller wheels, gate stem, ballast or bladder and their connections)

No Deficiencies Noted null null

a. Abrasion Damage Due to Operation N/A null null null

b. Alignment, Indications of Bowing or Buckling N/A null null null

c. Corrosion N/A null null null

d. Gate Control Anchorage N/A null null null

e. Indications of Stress or Structural Deterioration N/A null null null

f. Protective Coating Condition (Flaking, Peeling, Blisters) N/A null null null

g. Rivet, Weld Seam, or Bolt Condition N/A null null null

h. Section Loss N/A null null null

i. Structural Steel Condition N/A null null null

US153 Gate Seal Condition (Gaskets, Seal Ride, and Mating Surfaces) 1 No Deficiencies Noted null null

US154 Cathodic Protection (Use this for the entire structure, including gates, wingwalls, metal culverts, platforms, etc.)

N/A

None by Design null null

US155 Condition of Operator/Actuator Components(Includes limit switches, position indicator switches, and manatee systems)

N/A

None by Design null null

US156 Emergency Closure Gates N/A

None by Design null null

a. Abrasion Damage Due to Operation N/A null null null

b. Alignment, Indications of Bowing or Buckling N/A null null null

c. Cathodic protection anodes N/A null null null

d. Condition of Actuator or Actuator Components N/A null null null

e. Corrosion N/A null null null

f. Gate Anchorage N/A null null null

g. Gate Guides and Gate Control N/A null null null

h. Gate Seal Condition (Gasket and Mating Surfaces) N/A null null null

UW-18

Real

Time Deficiency Probable Cause

Recommended

Corrective

ActionsFinding Name

Underwater-Upstream Erosion Control i. Greasers N/A null null null

j. Indications of Stress or Structural Deterioration N/A null null null

k. Operability N/A null null null

l. Protective Coating Condition (Flaking, Peeling, Blisters) N/A null null null

m. Rivet, Weld Seam, or Bolt Condition N/A null null null

n. Section Loss N/A null null null

o. Structural Steel Condition N/A null null null

US157 Navigation Lock Gates N/A

None by Design null null

a. Buoyancy Tanks N/A null null null

b. Gate Anchorage N/A null null null

c. Gate supports N/A null null null

d. Hinge and pintel housing N/A null null null

e. Locking Mechanism N/A null null null

f. Operability N/A null null null

g. Protective Coating Condition N/A null null null

h. Staunching Devices N/A null null null

DOWNSTREAM:

Checklist Finding # C-Rating

Video

Real

Time

Deficiency Probable Cause Recommended

Corrective

Actions

DS1 Slope Degradation/Stability

No Deficiencies Noted null null

DS2 Condition of Rip-Rap (Loose/Seated)

No Deficiencies Noted null null

DS3 Exposed Erosion Control Fabric (C1 if not exposed)

No Deficiencies Noted null null

DS4 Evidence of Stone Displacement (For bedding stone) N/A

None by Design null null

DS5 Channel Stabilization and Erosion Control N/A

None by Design null null

DS50 Structure-General Concrete Condition (Out of all concrete members at the structure, state which ones have deficiencies, and which are fine)

N/A

None by Design null null

a. Concrete Chemical Reaction (Sulfate attack?)

N/A null null null

b. Concrete Cracks N/A null null null

c. Concrete Spalling (Is rebar exposed?)

N/A null null null

d. Concrete Structural Integrity N/A null null null

Underwater-Downstream General

Underwater-Downstream Erosion Control

Finding Name

UW-19

Real

Time Deficiency Probable Cause

Recommended

Corrective

ActionsFinding Name

Underwater-Upstream Erosion Control e. Exposed Rebar Corrosion N/A null null null

f. Offset (relative movement of opposing sides) N/A null null null

g. Scaling N/A null null null

h. Undermining N/A null null null

DS51 Structure-General Metal Condition (Out of all metal members at the structure, state which ones have deficiencies, and which are fine) 3 13:04:20

The barrel has coating failure throughout, surface corrosion and flaking up to 1/16", as well as knife edging and perforations at the barrel ends.

Exposure to an aggressive environment

Clean and coat affected areas

a. Corrosion

Moderate with flaking up to 1/16"

Exposure to an aggressive environment

Clean and coat affected areas

b. Offset (relative movement of opposing sides) N/A null null null

c. Section Loss

Up to 3'W by 2'L, 100% loss in isolated areas up to 20' from the barrel ends

Exposure to an aggressive environment

Clean and coat affected areas

d. Undermining N/A null null null

DS52 Structure-General Timber Condition (Out of all timber members at the structure, state which ones have deficiencies, and which are fine)

N/A

None by Design null null

a. Offset (relative movement of opposing sides) N/A null null null

b. Pile Caps N/A null null null

c. Rot N/A null null null

d. Splitting N/A null null null

e. Undermining N/A null null null

DS53 Structural Joints (e.g. Bolts, Welds) N/A

None by Design null null

DS54 Stop Log/Flashboard Channels (Including stop logs & flashboards) N/A None by Design null null

DS55 Settlement (Settlement of structure?) N/A None by Design null null

DS56 Shoaling/Scour (Shoaling=deposit of mat'l; Scour=removal of mat'l) N/A

None by Design null null

a. Downstream Foundation/Headwall N/A null null null

b. Downstream Sedimentation (Shoaling) N/A null null null

c. Shoaling/Scour Depth and Dimensions N/A null null null

d. Wingwalls N/A None by Design null null

DS57 Fouling/Marine Growth N/A None by Design null null

UW-20

Real

Time Deficiency Probable Cause

Recommended

Corrective

ActionsFinding Name

Underwater-Upstream Erosion Control a. Type, Consistency, Thickness N/A null null null

DS58 Debris N/A None by Design null null

DS59 Stilling Wells (If 'NA', Why?)

N/A

None by Design null null

a. Corrosion, Joint Damage N/A null null null

b. General Condition N/A null null null

c. Stilling Well Pier-Connections N/A null null null

d. Stilling Well Pier-Support (Support posts) N/A null null null

e. Stillwell Intake Lines (Stilling well pipes) N/A null null null

DS60 Underwater Controls/Instruments

3 13:48:10

Moderate surface corrosion on staff gauge steel mount and hardware, with pitting and section loss up to

1/16"

Exposure to an aggressive environment

Clean and coat affected areas

a. Fastening System in Suitable Condition

Moderate surface corrosion on staff gauge steel mount and hardware, with pitting and section loss up to

1/16"

Exposure to an aggressive environment

Clean and coat affected areas

b. Proper Location and Alignment N/A null null null

DS61 Fenders (Fenders for structure;

e.g. for boat locks) N/A null null null

DS100 Wingwalls N/A

None by Design null null

DS101 Buttresses (Support arms for wall)

N/A None by Design null null

a. Alkali-Silica or Chemical Reaction of Concrete N/A null null null

b. Construction Joint Condition N/A null null null

c. Cracking (Type and Size) N/A null null null

d. Erosion N/A null null null

e. Offset/Faulting (Relative Movement of Opposing Sides) N/A null null null

f. Reinforcement Corrosion N/A null null null

g. Spalling or Pop out N/A null null null

DS102 Abutments (Abutment walls are parallel to the flow) N/A None by Design null null

DS103 Retention Walls N/A

None by Design null

DS104 Headwall (Head walls are perpendicular to the flow)

N/A None by Design null

Underwater-Downstream Structural

Components

UW-21

Real

Time Deficiency Probable Cause

Recommended

Corrective

ActionsFinding Name

Underwater-Upstream Erosion Control DS105 Expansion Joints/Construction Joints (Use here if deficiency is not associated with the components listed) N/A

None by Design null null

DS106 Sheet Piles and Bulkheads N/A

None by Design null null

a. Concrete Condition N/A null null null

b. Concrete Pile N/A null null null

c. Condition of Coating Products N/A null null null

d. Corrosion N/A null null null

e. Deadman Condition N/A null null null

f. Joint or Knuckle Condition N/A null null null

g. Pile Cap N/A null null null

h. Sheet Pile N/A null null null

i. Timber Pile N/A null null null

j. Undermining N/A null null null

DS107 Wales/Tie Backs (hardware) (Used with sheetpile) N/A

None by Design null null

DS108 Discharge Bays N/A

None by Design null null

DS109 Piers (Pier walls that separate the bays) N/A None by Design null null

DS110 Foundations (Underneath the structure) N/A None by Design null null

DS111 Weir/Weir Crest N/A

None by Design null null

a. Alkali-Silica or Chemical Reaction of Concrete N/A null null null

b. Cracking (Type and Size) N/A null null null

c. Erosion N/A null null null

d. Offset/Faulting (Relative Movement of Opposing Sides) N/A null null null

e. Reinforcement Corrosion N/A null null null

f. Spalling or Pop out N/A null null null

DS112 Baffles N/A

None by Design null null

a. Alkali-Silica or Chemical Reaction of Concrete N/A null null null

b. Construction Joint Condition N/A null null null

c. Cracking (Type and Size) N/A null null null

d. Erosion N/A null null null

e. Offset/Faulting (Relative Movement of Opposing Sides) N/A null null null

UW-22

Real

Time Deficiency Probable Cause

Recommended

Corrective

ActionsFinding Name

Underwater-Upstream Erosion Control f. Reinforcement Corrosion N/A null null null

g. Spalling or Pop out N/A null null null

DS113 Underwater Apron Slabs N/A

None by Design null null

DS114 Structural Support, Bracing or Frames (For other structural components) N/A None by Design null null

a. Corrosion (Light, Moderate, Heavy) N/A null null null

b. Flaking, Peeling, Blisters N/A null null null

c. Pitting N/A null null null

d. Protective Coating Condition N/A null null null

e. Section Loss N/A null null null

f. Surface Area (% Damaged) N/A null null null

DS115 Culverts Interior (Include exterior of culvert, if it can be seen)

3 14:04:50

The barrel has coating failure throughout, surface corrosion and flaking up to 1/16", as well as knife edging and perforations at the barrel ends.

Exposure to an aggressive environment

Clean and coat affected areas

DS151 Gate Condition N/A

None by Design null null

a. Cathodic protection anodes N/A null null null

b. Corrosion (Light, Moderate, Heavy) N/A null null null

c. Gate Anchorage N/A null null null

d. Gate seal condition N/A null null null

e. Greasers N/A null null null

f. Indications of Stress or Structural Deterioration N/A null null null

g. Operability N/A null null null

h. Pitting (% Penetration Into Metal) N/A null null null

i. Protective Coating Condition (Flaking, Peeling, Blisters) N/A null null null

j. Rivet, Weld Seam, or Bolt Condition N/A null null null

k. Section Loss N/A null null null

l. Straight, Aligned, Indications of Bowing or Buckling N/A null null null

m. Surface Area (% Damaged) N/A null null null

DS152 Gate Guides and Gate Control (Includes rails and, depending on type of gate, roller wheels, gate stem, ballast or bladder and their connections)

N/A

None by Design null null

Underwater-Downstream Gates

UW-23

Real

Time Deficiency Probable Cause

Recommended

Corrective

ActionsFinding Name

Underwater-Upstream Erosion Control a. Abrasion Damage Due to Operation N/A null null null

b. Corrosion N/A null null null

c. Gate Anchorage N/A null null null

d. Indications of Stress or Structural Deterioration N/A null null null

e. Protective Coating Condition (Flaking, Peeling, Blisters) N/A null null null

f. Rivet, Weld Seam, or Bolt Condition N/A null null null

g. Section Loss N/A null null null

h. Straight, Aligned, Indications of Bowing or Buckling N/A null null null

i. Structural Steel Condition N/A null null null

DS153 Gate Seal Condition (Gaskets, Seal Ride, and Mating Surfaces) N/A

None by Design null null

DS154 Cathodic Protection (Use this for the entire structure, including gates, wingwalls, metal culverts, platforms, etc.)

N/A

None by Design null null

DS155 Condition of Operator/Actuator Components(Includes limit switches, position indicator switches, and manatee systems)

N/A

None by Design null null

DS156 Emergency Closure Gates N/A

None by Design null null

a. Abrasion Damage Due to Operation N/A null null null

b. Cathodic protection anodes N/A null null null

c. Condition of Actuator or Actuator Components N/A null null null

d. Corrosion N/A null null null

e. Gate Anchorage N/A null null null

f. Gate Guides and Gate Control N/A null null null

g. Gate Seal Condition (Gasket and Mating Surfaces) N/A null null null

h. Greasers N/A null null null

i. Indications of Stress or Structural Deterioration N/A null null null

j. Operability N/A null null null

k. Protective Coating Condition (Flaking, Peeling, Blisters) N/A null null null

l. Rivet, Weld Seam, or Bolt Condition N/A null null null

m. Section Loss N/A null null null

n. Straight, Aligned, Indications of Bowing or Buckling N/A null null null

o. Structural Steel Condition N/A null null null

UW-24

Real

Time Deficiency Probable Cause

Recommended

Corrective

ActionsFinding Name

Underwater-Upstream Erosion Control DS157 Navigation Lock Gates N/A

None by Design null null

a. Buoyancy Tanks N/A null null null

b. Gate Anchorage N/A null null null

c. Gate supports N/A null null null

d. Hinge and pintel housing N/A null null null

e. Locking Mechanism N/A null null null

f. Operability N/A null null null

g. Protective Coating Condition N/A null null null

h. Staunching Devices N/A null null null

Underwater-Comments DS1000 Additional Items & Comments

N/A

None by Design null null

UW-25