ADDENDUM NO. 2

TO THE CONTRACT DOCUMENTS

OLD FORGE DAM AND SIXTH LAKE DAM REHABILITATION

CONTRACT D012025

STATE OF NEW YORK

HUDSON RIVER - BLACK RIVER REGULATING DISTRICT

ALBANY, NEW YORK

AUGUST 5, 2025

Your attention is directed to the following interpretation of, changes in, and additions to the Invitation for

Bids Documents for the Old Forge Dam and Sixth Lake Dam Rehabilitation, Contract D012025.

This Addendum is issued in accordance with the Information for Bidders Documents, Section I-11

Clarifications, Interpretations and Addenda, and shall become part of the Contract Documents in accordance with Article 7 of the Agreement.

A. IN INFORMATION FOR BIDDERS

1. In Section I-24. Bid Instructions, DELETE “All Contract Documents, except separately bound Drawings, must be` submitted with the Bid. Contract Documents are defined in the General Conditions.”

SUBSTITURE THEREFORE, “All Bid Documents, except separately bound Drawings, must be submitted with the Bid.”

B. IN MATERIAL AND PERFORMANCE SPECIFICATIONS

1. In Section 03 22 00 Concrete Reinforcing, page 4, Part 2 – Products, 2.1 Materials, A., DELETE “1. All reinforcing bars shall be ASTM A615, Grade 60, unless indicated otherwise.” , and

SUBSTITURE THEREFORE, “1. All reinforcing bars shall be ASTM A767, Grade 60, unless indicated otherwise.”

2. In Section 31 09 13 Geotechnical Instrumentation and Monitoring, page 7, Part 3 –

Execution, 3.1 Installation, B.1, DELETE “500 feet”, and

SUBSTITUTE THEREFORE, “50 feet”

C. IN CONTRACT DRAWINGS

1. On Drawing C-05, in the Notes, ADD

“2.1. Trashrack shall extend vertically from the Boxout invert elevation of approximately

1697.75 feet to a Top of Rack elevation of 1711.00 feet.” and, “2.2. Trashrack shall be designed for complete blockage of the lower 60% of the surface area of the rack at a water surface elevation of 1711 feet.”

2. On Drawing C-13, in the Notes, ADD

“2.1. Trashrack shall extend vertically from the Boxout invert elevation of approximately

1774.75 feet to a Top of Rack elevation of 1791.00 feet.”

“2.2. Trashrack shall be designed for complete blockage of the lower 60% of the surface area of the rack at a water surface elevation of 1791 feet.”

3. On Drawing S-02, Special Inspection Notes, DELETE Note 1 in its entirety.

4. On Drawing E-02, in Note 1, DELETE “Remove and relocate all existing telemetry equipment as directed by the owner’s representative.” , and

SUBSTITUTE THERERFORE, “The owner shall remove and relocate all existing telemetry equipment and wiring.”

5. On Drawing E-08, Detail 5 – Electrical Service Ground Grid Detail, in Coded Notes, DELETE “#4/0” , and

SUBSTITUTE THEREFORE, “#6/0”

6. On Drawing E-08, Detail 5 – Electrical Service Ground Grid Detail, DELETE “ 2-1/2” ” , and

SUBSTITUTE THEREFORE, “ 6 feet”

D. IN PAYMENT ITEMS

1. On page PI-63, Item 26 – Floating Aluminum Docks, Section PI-26a Work Included, ADD “Timber steps”

E. RESPONSE TO QUESTIONS

Responses to prospective bidder questions are included in an attachment to this Addendum.

F. ATTACHMENTS

Underwater Inspection of Old Forge and Sixth lake Dam, ASI Marine, 2020 – Not Part of Contract

D012025 Response to Questions No. 2

Hudson River - Black River Regulating District

Robert S. Foltan, P.E.

Chief Engineer

Submitted to:

Arcadis of New York, Inc. / Arcadis CE, Inc.

Reference:

Old Forge and Sixth Lake – Old Forge, NY Inspection of Dams Using a Remotely Operated Vehicle Arcadis Project No. 30001381

Inspection Completed: 24 November 2020

Submittal Date:

22 January 2021

ASI Marine Project Reference:

RU19-045

REPORT

i

Executive Summary

ASI Marine L.P. (ASI) was subcontracted by Arcadis of New York (Arcadis), under project number 30001381, to conduct inspections of the upstream dam faces at the Old Forge and Sixth Lake Dams using remote inspection technologies.

Data collection was completed on the 24th of November 2020, using a remotely operated vehicle (ROV) equipped with video and sonar technologies. Appendices 4 through 6 contain processed inspection data.

Before transport to site and entering the water, the ROV was put through ASI’s Mussel Mitigation Procedure (refer to Appendix 3). This process involved cooking the ROV in the head office for 2 hours at a minimum of 104 F. On site the ROV was sprayed down with a 200 parts per million (ppm) chlorine solution and allowed to sit for 30-minute contact time.

Additionally, the tether was sprayed with a 10,000 ppm chlorine solution before entering the water.

The inspection started at Old Forge Dam, starting with the southern intake racks. The south intake racks were noted to have a layer of marine growth and debris accumulated at the bottom. The north intake rack was in similar condition, with marine growth on the bars, though there was a larger amount of debris accumulated on bottom with a log wedged between the concrete bullnose and the north side of the racks. The racks were divided by a concrete bullnose which was noted to have some spalling just below water line.

The north wall of the intake structure was noted to have spalling and timbers exposed near the north intake racks. No large amounts of debris were noted in the surrounding area. South of the intake structure was the low-level inlet; the inlet was closed by a gate.

The gate guides were noted be corroded. The north guide was noted to be damaged near the water surface. A PVC pipe runs down next to the south gate guide then elbows out 90 degrees away from the wall and continues about 18 feet where it elbows 90 degrees upwards away from the ground and ends. A large log was found lying on top of the PVC pipe. The inspection to the north and south of the intake structure was limited due to it becoming too shallow for the ROV to navigate. However, inspection along the north side revealed minor cracking.

The ROV was recovered and moved to Sixth Lake Dam. Both the north and south intake racks were noted to have leaves built up on the bars and corrosion was observed throughout. No large debris was noted in front of the racks. The intake racks were divided by a concrete bullnose; the bullnose had spalling and exposed rebar. The north wall of the intake structure appeared clear of any spalling or cracking; however, the south wall had spalling in 3 locations with some exposed rebar noted at one of them.

The dam face had some minor surface spalling but no evidence of undercutting or large scours was noted. In front of the dam face, minor amounts of accumulated debris were noted. A concrete slab used for a buoy anchor was observed with a log adjacent to the slab. The wall just south of the dam face was concrete in construction, then transitions to a timber construction. Some timbers were noted to be deteriorating. Continuing further south, two docks were noted; the surrounding area appeared clear of any large debris.

Finally, about 20 feet away from the intake structure was an 8-foot by 8-foot timber crib.

The crib was full of rock and sediment. Several of the timbers appeared to be missing.

ii

Table of Contents

1.0 INTRODUCTION

2.0 EQUIPMENT DESCRIPTION

2.1 Remotely Operated Vehicle

2.2 Multi-beam Imaging Sonar

3.0 INSPECTION PROCESS

3.1 Shop Preparations & Mobilization

3.2 Site Operations

3.3 Demobilization & Reporting

4.0 INSPECTION OBSERVATIONS

4.1 Old Forge Dam

4.2 Sixth Lake Dam

5.0 CONCLUSION

List of Appendices

Appendix 1: Site Information Appendix 2: Equipment Description Appendix 3: Daily Logs & Safety Documentation Appendix 4: Inspection Logs Appendix 5: Visual Stills o 5A – Old Forge o 5B – Sixth Lake

Appendix 6: Digital Media

ASI REPORT RU19-045

Arcadis of New York, Inc. / Arcadis CE, Inc.

Old Forge and Sixth Lake – Old Forge, NY Inspection of Dams Using a Remotely Operated Vehicle Arcadis Project No. 30001381

Inspection Completed: 24 November 2020

1.0 INTRODUCTION

ASI Marine L.P. (ASI) was subcontracted by Arcadis, under project number 30001381, to conduct inspections of the upstream dam faces at the Old Forge and Sixth Lake Dams using remote inspection technologies. The scope of the inspections was to provide Arcadis with a general condition assessment of the areas of interest, taking note of any anomalies such as cracks, spalling, debris, etc. The Old Forge Dam is approximately 130 feet long and the total surface area to be inspected was approximately 4,200 square feet. The Sixth Lake Dam is approximately 160 feet long and the total surface area to be inspected was approximately 32,400 square feet.

Figure 1: Overview of the locations of Old Forge and Sixth Lake Dams

Arcadis of New York, Inc. / Arcadis CE, Inc. ASI Marine Project RU19-045 Old Forge and Sixth Lake – Old Forge, NY Arcadis Project No. 30001381 Inspection of Dams Using a Remotely Operated Vehicle Inspections Completed: 24 November 2020

2.0 EQUIPMENT DESCRIPTION

2.1 Remotely Operated Vehicle

Due to its capabilities and size, ASI Marine provided its MSS Defender ROV. This vehicle is ballasted to be neutrally buoyant in fresh water and uses seven electric thrusters to propel itself through the water. Four vectored thrusters are used for lateral movement and forward travel, making it capable of pulling long tether lengths; three vertical thrusters enable the vehicle to move vertically. This vehicle is also equipped with two dimmable LED lights to illuminate the area of inspection for the high-definition camera mounted on the front of the vehicle (refer to Figure 2).

Figure 2: MSS Defender in inspection configuration with camera and lighting

The system utilized a 1,000-foot umbilical cable. This umbilical houses signal and power conductors along with a Kevlar strength member and abrasion resistant protective jacket. The umbilical is neutrally buoyant in water to reduce drag and allow for further penetration distances.

An ROV pilot controls the vehicle’s movement, lighting, and camera position from the surface with the use of a hand-held control console.

The IP video signal is routed to the surface via the umbilical. The signal is then fed into a high-resolution monitor for the pilot to view, allowing real time viewing capabilities. The video signal is recorded onto a video recording computer and audio commentary is added to document points of interest and anomalies as they are seen during the inspection.

2.2 Multi-beam Imaging Sonar

A two-dimensional imaging sonar was integrated onto the MSS ROV. This sonar provided real-time plan view feedback directly ahead of the ROV, making it a highly effective navigation and obstacle-avoidance tool. The sonar also provides valuable feature detection capabilities for inspection (refer to Figure 3).

Figure 3: 2D Multibeam imaging sonar on ROV (representative image only)

3.0 INSPECTION PROCESS

3.1 Shop Preparations & Mobilization

ASI personnel assembled the equipment spread and ancillary tools at our shop prior to traveling to Old Forge, NY. All sonar and inspection equipment were integrated onto the ROV in a dry bench shop setting and were function tested. After passing dry tests, the ROV was wet tested in ASI’s test tank to ensure all components of the package functioned appropriately. Upon confirmation, the ROV was ballasted to be neutrally buoyant in fresh water.

The ROV was put through ASI’s Mussel Mitigation Procedure (refer to Appendix 3), including a hot water bath at a minimum temperature of 104ºF for two hours. The equipment was packed into a truck and trailer for operations. Two ASI personnel (Site Lead/ROV pilot, and tether tender) were assigned to site operations. They departed the head office on the 23rd of November 2020.

3.2 Site Operations

On the morning of the 24th of November, the ASI personnel met with one representative from Arcadis and one representative from Hudson River-Black River Regulatory District (HRBRRD) at the Old Forge Dam. The trailer was staged on the south side of the dam for ease of access to the designated launch location. A safety meeting was then conducted between the ASI personnel. The topside control station was assembled inside the trailer and the ROV and ancillary tools were connected. ASI’s standard pre-dive procedure was then performed to minimize risk of system failure and to ensure the system would perform as expected.

Before the ROV was powered on, visual and tactile inspections were completed to ensure all connection and mechanical hardware were secure. Power-up checks were then conducted on the ROV.

Figure 4: Topside control station inside the trailer

Spill containment was set up near the launch location and the ROV and tether were placed inside it. The ROV was disinfected following ASI’s Disinfection Procedure. The ROV was doused with a chlorine solution at 200 ppm and allowed to sit for 30 minutes. The tether was sprayed with a 10,000 ppm chlorine solution and wiped down for an instantaneous contact time immediately prior to entering the water.

Figure 5: ROV and tether going through disinfection procedure

While the ROV was disinfecting for 30 minutes, the representative from HRBRRD closed the gates on the Old Forge dam. Once the 30 minutes was complete, the ROV was lowered into the water at the south end of the upstream side of the dam. The ROV began the inspection with the trash racks, inspecting both the north and the south intakes. The pilot then proceeded to check for any large debris that may be in front of the intake area. The housing for the inducer for measuring water level was located and inspected, following it back to the low-level inlet. The low-level inlet was then inspected and the gate to the intake was closed. The ROV was unable to inspect further to the north or south of the intakes due to the shallow water level. The ROV was then recovered to the surface and the trailer was packed for transport to Sixth Lake Dam.

The trailer was staged on the north side of the Sixth Lake Dam and the topside console was re-assembled in the trailer. The ROV was then lowered into the water at the north end of the upstream side of the dam, with the inspection commencing at the intake structure, starting with the north intake racks and then proceeding to the south. The area in front of the intake was then inspected for any large debris. The north and south walls were inspected for any spalling or cracking. On completion of the intake structure, the ROV proceeded to the dam face, taking note of any spalling or debris in front of the dam. A small timber crib was located in front of the dam and intake structure. This small crib was inspected. The ROV was then flown to the far south side of the dam near the floating docks. The area was inspected for any large debris. The ROV was then recovered and the trailer was packed.

3.3 Demobilization & Reporting

At the end of the day, all data was backed up on an external hard drive for transport to ASI’s head office. ASI personnel began travel back on the 24th of November.

A review of the data collected during the inspection was completed at ASI’s office. The assembly of this report was then completed. The report includes equipment descriptions, documentation of methodology, inspection logs and data, and observations that were noted during the time of the inspection.

4.0 INSPECTION OBSERVATIONS

The following information is provided in appendices to supplement the observations reported herein:

• Appendix 4: Inspection Logs o Log of events and observations made during the inspection

• Appendix 5: Visual Stills o Video and sonar stills observed during the inspection

• Appendix 6: Digital Media o Edited video of the inspection

4.1 Old Forge Dam

Figure 6: Plan view drawing of Old Forge Dam with approximate location of intake racks and low-level gate.

The south intake rack was observed to be intact with no bent or missing bars. The bars were also noted to have a layer of marine growth (refer to left of Figure 7). A small amount of debris was noted near the bottom of the racks at about 6 feet below water surface (right Figure 7). The racks were measured to be approximately 4.6 feet wide.

Figure 7: Marine growth on south intake racks (Left); Debris on bottom of south intake rack (Right)

The north intake rack was observed to be intact with no bent or missing bars. The bars were also noted to have a layer of marine growth (refer to left of Figure 8). Larger amounts of debris were noted on the bottom of the racks with a log that appears wedged between the concrete bullnose and the north side racks located near the bottom at about 6 feet below water surface (right Figure 8). The racks were measured to be approximately 4.6 feet wide. The concrete bullnose divided the two intake racks and was noted to have some minor spalling on it at about

1.5 feet below water surface (Figure 9).

Figure 8: Marine growth on north intake racks (Left); Debris on bottom of north intake rack (Right)

Figure 9: Spalling on bullnose 1.5 feet below water surface

Directly in front of the intake racks was debris on bottom as noted previously (Refer to left of Figure 10). As the ROV moved away from the intake racks, the debris became less prominent and only smaller rock debris was noted (right Figure 10). While inspecting the north wall of the intake structure, some spalling and exposed timber was noted (Figure 11).

Figure 10: Debris in front of the intake racks (Left); Minor debris leading away from the racks (Right)

Figure 11: Spalling and exposed timber on the north wall of the intake structure

South of the intake structure was what appeared to be a low-level inlet. This inlet was noted to have a gate in front of it. The gate guides had some corrosion on them and damage on the north gate guide near the surface. The gate itself appeared intact with some debris and marine growth present.

Figure 12: Corrosion on the low-level inlet gate guides (Left); Damage to north gate guide (Right)

Figure 13: Low level inlet gate with marine growth

Just south of the low-level inlet was an elevation meter and a PVC pipe. The PVC pipe was the housing for the inducer that measured the water levels, it went all the way to bottom and had a 90-degree elbow that turned away from the wall and proceeded about 18 feet. Following the pipe, a log was found lying on top of it at approximately 14 feet away from the dam. It was uncertain if the log had caused any damage. The end of the pipe elbows up 90 degrees and is capped off, with the cap noted to have small holes in the top.

Figure 14: Log laying on the PVC pipe (Left); Elbow at the end of the pipe (Right)

Looking at the wall to the north of the intake structure, some minor cracking was observed near the surface. At this point it became too shallow for further inspection. On the north side of the intake structure, a vertical crack was observed (refer to Figure 15). Further investigation along the wall was prohibited due to limited water depth.

Figure 15: Cracking found on north side of the intake structure.

4.2 Sixth Lake Dam

Figure 16: Plan view drawing of Sixth Lake Dam with approximate location of intake racks.

The north intake rack was observed to be intact with no bent or missing bars. Some marine growth, leaves and corrosion were noted on the bars of the racks. No debris was noted in front of the racks. The north rack was measured to be approximately 5 feet wide.

Figure 17: Leaves on the north intake racks (Left); Corrosion on the North intake rack (Right)

The south intake rack was observed to be intact with no bent or missing bars. Some marine growth, leaves and corrosion were noted on the bars of the racks. No debris was noted in front of the racks. The south rack was measured to be approximately 5 feet wide.

Figure 18: Corrosion on the south intake racks (Left); Leaves on the south intake rack (Right)

A concrete bullnose divides the two trash racks. Some spalling was noted on the bullnose near the surface and continues to bottom. The spalling has exposed the structural rebar (refer to Figure 19).

Figure 19: Spalling with exposed rebar on the bullnose (Left); Spalling continuation (Right)

The north wall of the intake structure had no indication of spalling or cracking. However, the south wall of the intake structure had spalling in multiple locations. The first was right at the corner near the intake structure. This area of spalling had exposed rebar which was noted to be corroded. Following the wall east, another section of spalling was noted on the top of the wall as it sloped downwards. The final area was noted at the end of the wall where it sloped into the bottom (refer to Figure 20 and Figure 21 below).

Figure 20: First section of spalling on south wall (Left); Second section of spalling on south wall (Right)

Figure 21: Final section of spalling on south wall

Around the corner of the north wall was the elevation meter and a PVC pipe. The PVC pipe is the housing for the inducer that measures water level, it followed the wall down to bottom where it appears to be capped off.

Figure 22: Elevation meter on the north side (Left); Bottom of the PVC pipe (Right)

The dam face was noted to have some surface spalling, but no major material appears to be lost. In front of the dam was some rock debris and a log. Additionally a slab of concrete used for a buoy anchor was noted in front of the dam on the north side.

Figure 23: Spalling on the north side of dam face (Left); Spalling and rock debris on the south side of dam face (Right)

Figure 24: Concrete slab and log in front of the dam face

Following the wall south of the dam face, it was noted that some timbers were used to construct a portion of the wall. Sections of the timbers appeared to be deteriorating (refer to Figure 25).

Continuing further south, two docks were observed on the south side of the lake. 2D imaging sonar revealed no large debris in the area around the docks.

Figure 25: Transition from concrete to timbers (Left); Deteriorating timbers on the south wall (Right).

Figure 26: Dock located south of the dam.

A small timber crib was noted about 20 feet east from the south intake rack. The timber crib was approximately 8 x 8 feet. It was noted to be filled with debris and sediment. There were some missing planks noted with some exposed rebar as well.

Figure 27: East side of the timber crib (Left); Missing planks and debris inside the crib (Right)

5.0 CONCLUSION

The inspection of the Old Forge and Sixth Lake Dams took place on the 24th of November 2020.

Starting with the Old Forge Dam, some debris was noted in front of both the intake racks as well as marine growth on the bars. The low-level inlet was observed to the south of the intake racks and was closed with a gate. Some corrosion was noted on the gate guides and some damage on the north guide near the surface. The inducer for measuring water level was noted coming down from surface next to the low-level inlet where it makes a 90-degree bend and continues away from the dam for approximately 18 feet and elbows 90 degrees upwards where it is then capped off. Holes were noted in the cap.

After the inspection of Old Forge, all equipment was transported to Sixth Lake and staged on the north side. The intake racks appeared intact with no visible damage and no debris was built up in front of the racks. The racks were divided by a bullnose which had spalling and exposed rebar. The south wall of the intake structure had three locations of spalling noted. The dam face had minor surface spalling and minimal amounts of debris accumulated in front of it. A concrete slab for a buoy was observed in front of the dam. The south wall started its construction with concrete where it then transitions to a timber construction. Some of the timbers were observed to be deteriorating. Approximately 20 feet east of the south intake rack was a timber crib measuring approximately 8 X 8 feet. Some timbers were noted missing and the crib was observed to be filled with rock debris and sediment.

With adequate planning, ROVs can be useful to identify damaged areas, leaks, sediment and debris accumulation, and can complete accurate general condition assessments. These inspections can also be performed with very little risk to personnel or equipment, as well as with fewer limitations due to factors such as depth and shutdown times. This operation was completed using high-definition video, and real-time imaging sonar. Inspection operations were performed with minimal impact to dam operations and in accordance with ASI’s work plan, with a strong focus on safety, and were completed within the allotted timeframe.

Site Information

Appendix 1:

Equipment Description

Appendix 2:

The Mission Specialist Series (MSS) Defender ROV is one of ASI’s smallest vectored vehicles. The MSS is a highly capability.

STANDARD EQUIPMENT

• 2 x dimmable LED lights with wide and narrow beam control

• 4 vectored and 3 vertical brushless DC thrusters

• Portable cable payout counter

• High resolution colour main camera with tilt

• Real-time multibeam navigation imaging sonar

• Video overlay for display of date, time and cable payout

POWER REQUIREMENTS

• Single phase power for hotel loads

120-140 VAC at 3kW 50/60 Hz

• Single phase power for for 2.5 km winch 208-240 VAC at 4kW 50/60 Hz

SPECIALIZED TOOLING AVAILABLE ON A PROJECT-SPECIFIC BASIS

OPTIONAL EQUIPMENT

Including but not limited to:

• Single function manipulator

• Inertial navigation system

VEHICLE DIMENSIONS

Length

Width

Minimum Tunnel

Diameter

Depth Rating

Estimated Weight

0.72 m

0.40 m

0.45 m

300 m

16 kg

2.36 ft

1.31 ft

1.47 ft

1000 ft

35 lb

UMBILICAL LENGTHS

Long

Short

2.5 km

320 m

1.6 mi

1050 ft asi-group.com info@asi-group.com

566 Arvin Avenue, Stoney Creek, ON, Canada L8E 5P1 | tel 905-643-3283

40 Centre Drive, Suite 3, Orchard Park, NY USA 14127 | tel 716-667-3507 interchangeable system which provides a customizable platform that can be easily adaptable for any inspection requirement.

The vehicle can be retro�tted with a wide variety of sonars and sensors, as well as additional thrusters for more pull or lifting

• Scanning & Multibeam pro�ling sonar

• Metal thickness NDT probe

• USBL tracking

ASI MSS Defender

Daily Logs & Safety Documentation

Appendix 3:

Field Report - ROV Division

Facility:

Location:

Name Activity Start Time

(HH:MM)

End Time (HH:MM) Total Hours

Nicholas Wittering 205 - Insp 6:50 18:50 12.00

Len Stewart 205 - Insp 6:50 18:50 12.00

0.00

0.00

0.00

0.00

Consumables (QTY)

Time

06:50 06:55 07:10 07:20 07:50 08:00 08:15 08:30 09:15 09:35 10:00 10:15

Date:2020-11-24

Client:Arcadis Client Reference (PO, Contract No.):

Old Forge/Sixth Lake

Old Forge/Sixth Lake

ASI Job Number:RU19-045

070 - Tech

Position (Function)

110 - Sr Tech

Other EquipmentASI Equipment safety meeting

MSS

Record of Events

Description leave hotel on site set up. Hates closing. Doing pre dives finished inspection packed up about to head to sixth lake start set up start disinfection process pre dive checks closing gates ROB in water. Speed of sound set to 1407. Starting inspection at sixth lake start set up

File ID: 2020-11-24 - Field Report.xlsx Revised: 25-Oct-19 1 of 1

ASI Mussel Mitigation Verifcation Report

ASI Mussel Mitigation Verification Report

ASI Marine Project: RU19-045 Procedure Conducted By: Nicholas Wittering, ROV Technician Procedure Conducted: 23 November 2020

Certification Statement

On 23 November 2020, ASI’s remotely operated vehicle (ROV), the Videoray MSS defender, and ancillary equipment (i.e. ballast, weights, sensors, etc) to be used for the RU19-045, were subjected to ASI’s ROV Mussel Mitigation Procedure. This procedure ensures 100% mortaility of mussels.

The entire process required approximately 4.5 hours: 1.5 hours to bring the water up to 104°F or higher, and approximately 2 hours to complete the soaking process. The ROV Technician conducting the soak monitored the temperature throughout the process to ensure it remained at least 104°F. The temperature was monitored and recorded using a temperature data logger that sampled temperature mid-depth in the tank and corresponding time, as well as with a handheld pyrometer that recorded water surface temperature at random times throughout the process.

Time ROV was put into hot water bath: Time 10:57 Temp: 116°F Time hot water bath was completed: Time 13:00 Temp: 112°F

In the following pages, ASI has provided time-stamped photography of the hot water bath procedure, verifying the temperature and time.

Nicholas Wittering ROV Technician

Figure 1: Temperature Reading (Time:10:57, Temp: 116°F)

Figure 2: Temperature Reading (Time:11:27, Temp: 113°F)

Figure 3: Temperature Reading (Time:11:58, Temp: 112°F)

Figure 4: Temperature Reading (Time:12:29, Temp: 112°F)

Figure 5: Temperature Reading (Time:13:00, Temp: 112°F)

Inspection Logs

Appendix 4:

ASI Inspection Log

DATE: 2020-11-24 CLIENT: ARCADIS

PROJECT #: RU19-045 LOCATION: OLD FORGE

TIME

(hh:mm:ss)

08:25:36 ROV in water

08:27:05 Temp of water is 2C set speed of sound to 1407, Depth sensor zeroed on land

08:30:22 South intake rack 08:32:40 Bottom is 7ft deep 08:34:40 Crack on north side @2m from north corner 08:36:08 Sonar view of intake racks 08:36:45 Cracking and spalling in front of north rack (timber?)

08:37:00 Center bull nose 08:37:15 Missing aggragate and cracking on bull nose 08:37:34 Debris on bottom 08:38:22 Slight spalling 08:38:46 Tide gauge @ 5.2 08:39:29 Gate guide, possible low level inlet 08:39:51 Debris on low level inlet 08:41:25 Pipe of some sort @7.8ft 08:42:50 Following pipe 08:43:06 Debris on pipe 08:43:48 Pipe going into low level inlet @ 6.4ft 08:44:43 Following N guide up 08:45:09 Damage to north guide 08:45:43 Build up on South guide 08:45:56 Center stem shows corrosion 08:48:02 Profile 1 South Racks 08:48:49 Sonar screen shot of south intake from surface 08:49:01 Sonar screen shot of south intake from bottom 6.6 ft 08:50:04 Sonar screen shot of north intake from bottom 5.8 ft 08:50:19 Sonar screen shot of north intake from surface 08:51:55 Poor profile from north side 08:52:43 Print screen of north intake @ 1.8m away facing 30 degrees 08:54:51 Print screen of south intake @ 2m away facing 30 degrees 08:56:06 Print screen north intake, nose in @ surface 08:57:51 Print screen south intake, nose in @ surface 08:59:43 Print screen of bull nose, nose in @ surface 09:00:43 Print screen of bull nose, nose in @ surface 1m away 09:01:23 Print screen of bull nose, nose in @ surface 2m away 09:01:44 Print screen of bull nose, nose in @ surface 3m away 09:02:00 Print screen of bull nose, nose in @ surface 3m away

Approx distance of pipe to damn approx 5.6m 09:04:59 Sonar over view of damn 09:15:54 ROV out of water.

DESCRIPTION

PROJECT #: RU19-045 LOCATION: SIXTH LAKE

TIME

(hh:mm:ss)

10:18:15 Depth sensor zeroed 10:20:18 Temp is 3 degrees SOS set to 1416 10:25:02 North intake rack 10:25:13 North intake rack 10:26:01 North of north rack bottom 10:26:52 South of north rack @ 5.3ft 10:27:40 Tide staff @ 83ft water elev 10:27:58 South of north rack, corrosioin 10:28:36 Surface south of north rack 10:28:58 Damage on bull nose 10:30:02 Exposed rebar on bullnose 2ft of depth 10:30:26 Missing concrete and exposed rebar 10:31:34 South intake north side, on bottom, spalling 10:32:38 South side south rack 10:32:58 South side bottom 10:33:16 Cribbing 10:34:27 Profile at north rack 10:34:53 Profile at south rack 10:35:35 Profile at bullnose @ 0m 10:35:54 Profile 1m from bullnose 10:36:19 Profile 2m from bullnose 10:36:58 Profile at 3m from bull nose 10:37:25 Inspection of wall on south side of north wall 10:38:38 Round corner, west sid of north wall 10:40:27 Spalling on south wall, north side @ 2ft down 10:41:04 North side of south wall 10:41:22 North side of south wall 10:41:38 Looking up into spalling 10:42:06 Lip on south wall 10:42:28 Possible rebar 10:43:50 Depth @5.2ft down, and 2m from dam 10:44:03 Cracking and spalling on spill way 10:45:53 Cracking on spillway @ surface 10:46:24 South side of dam 10:47:02 Delamination of concrete spill way south end 10:48:57 Shot of debris in front of dam bottom @4.5ft 10:49:55 Spalling on bottom of dam 10:50:34 Timbers south wall north south side 3m from dam 10:51:04 More timber 10:51:47 Timber damage 10:52:39 Too shallow to go on south side 10:53:02 Looking for cribs 10:53:27 Dam itself on sonar 10:54:21 Timber cribbing 7.5m from intakes 10:54:48 Top of cribbing 10:55:18 3ft deep cripping missing with fill over flow

DESCRIPTION

PROJECT #: RU19-045 LOCATION: SIXTH LAKE

TIME

(hh:mm:ss)

DESCRIPTION

10:56:04 Views of cribbing 10:56:17 4.6ft depth cribbing 10:59:39 Facing north profile of slope of dam center 11:00:15 Facing north profile of slope of dam north 11:01:00 End of initial survey 11:09:41 Showing client damage 11:22:21 Did inspection by the docks on the south side.

11:22:35 Recovering ROV

Visual Stills

5A – Old Forge

5B – Sixth Lake

Appendix 5:

Image 5A -1: Marine growth built up on south intake racks.

Image 5A -2: Debris on bottom of south intake racks.

5A

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

VISUAL STILLS

OLD FORGE

ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

CLIENT LOGO

SHEET 1 OF 14

Image 5A -3: PVC pipe extending from low level inlet.

Image 5A -4: Concrete wall with timbers on the north side.

5A

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

VISUAL STILLS

OLD FORGE

ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 2 OF 14

Image 5A -5: Debris accumulation in front of north intake rack.

Image 5A -6: Minor debris accumulation on north side of the dam.

5A

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

VISUAL STILLS

OLD FORGE

ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 3 OF 14

Image 5A -7: Cracking found on the north wall of the dam.

Image 5A -8: 2D sonar imagery of the intake racks.

NORTH INTAKE

SOUTH INTAKE

BULLNOSE

5A

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

VISUAL STILLS

OLD FORGE

ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 4 OF 14

Image 5A -9: Exposed timber on the north side of the crib.

Image 5A -10: Spalling on the bullnose.

5A

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

VISUAL STILLS

OLD FORGE

ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 5 OF 14

Image 5A -11: Debris accumulation in front of bullnose.

Image 5A -12: Minor spalling on bullnose.

5A

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

VISUAL STILLS

OLD FORGE

ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 6 OF 14

Image 5A -13: Elevation marker on the south side of the racks.

Image 5A -14: Gate guides and stem for low level inlet.

5A

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

VISUAL STILLS

OLD FORGE

ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 7 OF 14

Image 5A -15: Marine growth in front of low level inlet.

Image 5A -16: Inducer for water level measurements.

5A

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

VISUAL STILLS

OLD FORGE

ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 8 OF 14

Image 5A -17: Inducer for water level heading back towards the dam.

Image 5A -18: Debris on top of pipe for the level sensor.

5A

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

VISUAL STILLS

OLD FORGE

ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 9 OF 14

Image 5A -19: Closed gate for low level inlet.

Image 5A -20: Marine growth on top of low level inlet.

5A

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

VISUAL STILLS

OLD FORGE

ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 10 OF 14

Image 5A -21: Corrosion on gate guide for low level inlet.

Image 5A -22: Damage to the north gate guide on the low level inlet.

5A

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

VISUAL STILLS

OLD FORGE

ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 11 OF 14

Image 5A -23: Additional corrosion and marine growth on the guide for the low level inlet.

Image 5A -24: Marine growth on the guides for the low level inlet.

5A

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

VISUAL STILLS

OLD FORGE

ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 12 OF 14

Image 5A -25: Marine grown on the top of the south intake racks.

Image 5A -26: Debris accumulation in front of south intake racks.

5A

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

VISUAL STILLS

OLD FORGE

ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 13 OF 14

Image 5A -27: Debris in front of north intake trash racks.

5A

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

VISUAL STILLS

OLD FORGE

ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 14 OF 14

Image 5B-1: Debris accumulated on the north intake rack.

Image 5B-2: Debris and some minor rust on the bottom of the north intake rack.

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 1 OF 24

Image 5B-3: Level gauge on the north side of the dam.

Image 5B-4: Rust on the north intake rack.

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 2 OF 24

Image 5B-5: Debris accumulated on the north intake rack.

Image 5B-6: Spalling on the top of the bullnose.

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 3 OF 24

Image 5B-7: Spalling on the bullnose.

Image 5B-8: Spalling and exposed rebar on the bullnose.

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 4 OF 24

Image 5B-9: Spalling and on the bullnose.

Image 5B-10: Spalling and exposed rebar on the bullnose.

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 5 OF 24

Image 5B-11: Spalling on the bottom of the bullnose.

Image 5B-12: Debris accumulation on the south intake rack.

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 6 OF 24

Image 5B-13: Rust at the bottom of the south intake rack.

Image 5B-14: Timber crib.

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 7 OF 24

Image 5B-15: Minor rock debris accumulated in front of the intake racks.

Image 5B-16: 2D sonar imagery of the intake racks.

NORTH INTAKE

SOUTH INTAKE

BULLNOSE

DAM FACE

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 8 OF 24

Image 5B-17: Minor rock debris in front of intake racks.

Image 5B-18: Wall on the north side of the intake structure.

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 9 OF 24

Image 5B-19: Minor debris accumulation in front of the intake racks.

Image 5B-20: 2D sonar imagery of the north intake and north wall.

NORTH INTAKE

BULLNOSE

NORTH WALL

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 10 OF 24

Image 5B-21: Minor debris accumulation in front of intake racks.

Image 5B-22: Minor debris accumulation in front of intake racks.

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 11 OF 24

Image 5B-23: PVC pipe on the corner of the north wall of the intake structure.

Image 5B-24: Bottom of inducer for measuring water level.

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 12 OF 24

Image 5B-25: Spalling on the south wall (side of the dam face) of the intake structure.

Image 5B-26: Minor spalling on dam face.

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 13 OF 24

Image 5B-27: SSpalling on the south wall (side of the dam face) of the intake

Image 5B-28: Spalling on the south wall (side of the dam face) of the intake structure.

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 14 OF 24

Image 5B-29: Spalling on the south wall (side of the dam face) of the intake

Image 5B-30: Spalling and exposed rebar on the south wall (side of the dam face) of the intake structure.

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 15 OF 24

Image 5B-31: Spalling on the south wall (side of the dam face) of the intake structure and rock debris.

Image 5B-32: Spalling on the dam face.

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 16 OF 24

Image 5B-33: Spalling on the dam face.

Image 5B-34: Wall on the south side of the dam face.

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 17 OF 24

Image 5B-35: Rock debris in front of dam face.

Image 5B-36: Timber and anchor for buoy in front of dam face.

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 18 OF 24

Image 5B-37:Timber debris in front of dam face.

Image 5B-38: Spalling on the dam face.

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 19 OF 24

Image 5B-39: Timbers on the wall south of the dam face.

Image 5B-40: Timbers on the wall south of the dam face.

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 20 OF 24

Image 5B-41: Timbers on the wall south of the dam face.

Image 5B-42: 2D Sonar imagery of the dam.

DAM FACE

INTAKE STRUCTURE

NORTH WALL

DEBRIS

SOUTH WALL

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 21 OF 24

Image 5B-43: East side of the timber crib.

Image 5B-44: North east side of the timber crib with exposed rebar.

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 22 OF 24

Image 5B-45: North west side of the timber crib with rock debris..

Image 5B-46: Inside timber crib.

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 23 OF 24

Image 5B-47: East side of the timber crib.

Image 5B-48: Sediment accumulation on the east side of the timber crib.

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 24 OF 24

Image 5B-49: Pier on the far south side of the dam.

5B

APPENDIX:

OLD FORGE AND SIXTH LAKE

DAMS INSPECTIONS USING A

ROV

SIXTH LAKE

VISUAL STILLS ASI PROJECT: RU19-045

PROJECT DATE: NOV, 2020

DRAWN BY: N. WITTERING

ARCADIS OF NEW YORK,

INC./ ARCADIS CE, INC.

SHEET 25 OF 24

Digital Media

Appendix 6:

Old Forge Dam and Sixth Lake Dam Rehabilitation Contract D012025

Prospective Bidder Questions August 5, 2025

S:\Engineering\Black River Area\Construction and Rehabilitation\Old Forge\D012025 Old Forge Dam and Sixth Lake Dam Rehabilitation\Bid Documents\Addendum No 2\D012025 Response to Questions No 2.docx

Response to Questions Related to Both Construction Sites

Q. On S-02 there is a note that states that District/Architect/Engineer of Record shall pay for special inspectors/inspections. However, in spec section 01 45 29.13 it states Contractor shall employ the services of special inspectors. Please provide clarification.?

A. Contractor shall employ and provide the services of “special inspectors” material testing, or similar laboratories.

Q. 31 09 13 spec section 1.3 A states that all structures within 50 ft need to have seismographs installed, while 3.1 B of the same section lists 500 ft. Please provide clarification, as the number of structures that fall within 500 ft is substantially different than 50 ft.?

A. Specification 31 09 13, Section 3.1.B.1 is modified by Addendum No. 2.

Q. Are all buried electric and communication conduits to be constructed according to detail 4 on E-08, or will concrete encasement be required?

A. Buried electric and communication conduits shall be constructed according to Detail 4 on Drawings E-08.

Q. Do both sites have the ability for 120/240V, 3 phase, 4 wire for temporary services rated at 200 amps?

A. Contractor shall confirm the availability of electrical power at each site with the local electrical utility company.

Q. Is a 4/0 bare copper ground cable required in each duct bank run?

A. A 4/0 bare copper ground wire is not required in each duct bank run.

Q. Due to the complexity involved with the two contractor designed cofferdams, we request a bid extension until August 22nd?

A. The bid due date will not be extended.

Q. Can a 4 week extension be granted?

A. The bid due date will not be extended.

Q. Will a temporary log boom be required during phase 2 of construction at both sites?

A. A temporary log boom is not required during Phase 2. The final log boom shall be installed before requesting Department of Environmental Conservation acceptance of the work and requested permission to fill and prior to removal of Phase 2 cofferdam. Contractor may install the final log boom during installation of Phase 2 cofferdam.

Q. In Section I-9 (Subcontractors) of the Information for Bidders, it states: “Proposed Subcontractor shall submit to the Bidder, for submission by Bidder as part of its bid, similar evidence of qualifications, experience, personnel experience, insurance, and business financial information.” What constitutes evidence of qualifications for subcontractors? Could you clarify what you are looking for in terms of insurance documentation for subcontractors? Also, due to the confidential nature of a business’ financial statements, would it be okay to submit the subcontractors’ business financial information post bid if we are the low bidder?

A. Evidence of qualifications shall include a summary of similar work experience and similar jobs completed in the past five years. The requirements for Subcontractors’ proof of insurance are the same as the Contractor. Financial information is equally protected from, or subject to, Freedom of Information Laws (FOIL) regardless of whether it is submitted with a bid or after award, and therefore, shall be submitted with a bid.

Old Forge Dam and Sixth Lake Dam Rehabilitation Contract D012025

Prospective Bidder Questions August 5, 2025

S:\Engineering\Black River Area\Construction and Rehabilitation\Old Forge\D012025 Old Forge Dam and Sixth Lake Dam Rehabilitation\Bid Documents\Addendum No 2\D012025 Response to Questions No 2.docx

Q. In Section I-24 (Bid Instructions) of the Information for Bidders, it states that “All Contract Documents, except separately bound Drawings, must be submitted with the Bid. Contract Documents are defined in the General Conditions.”. Can you please confirm that we are required to submit all of the contract documents listed under Article 4 of the Sample Agreement (PDF Page 80 – Vol. 1) with our bid proposal?

A. Information for Bidders Section I-24 is modified.

Q. In lieu of completing the [Vendor Responsibility] questionnaire provided in the documents, would a copy of our CCA-2 Certification suffice?

A. A bidder may submit Form AC 3292-S NEW YORK STATE VENDOR RESPONSIBILITY

QUESTIONNAIRE FOR-PROFIT CONSTRUCTION (CCA-2), or may submit proof of New York State VendRep System Vendor Responsibility certification.

Q. Please confirm that the only utilization plan required to be submitted with the bid is the SDVOB utilization plan?

A. Form SDVOB 100: Utilization Plan and Form MWBE 101: Staffing Plan shall be submitted with a bid.

Q. In what bid item should MPT be included?

A. Maintenance and protection of traffic is included in Payment Item PI-1 Mobilization and Demobilization.

Q. Is there any information on the rock beneath the…