Amended Specs 2004-05-28-0005.pdf

The following modifications are made to the SCHEDULE OF PRICES, SECTION 01 11 00, SECTION 01 20 00 00, and SECTION 01 53 11.

SCHEDULE OF PRICES

a. ALL PAGES. Delete the Schedule of Prices in its entirety, and substitute therefor revised Schedule of Prices, AMEND 0005 dated 28 May 2024.

SECTION 01 11 00

b. ALL PAGES. Delete Section 01 11 00 in its entirety, and substitute therefor revised Section 01 11 00, AMEND 0005 dated 28 May 2024.

SECTION 01 20 00

c. ALL PAGES. Delete Section 01 20 00 in its entirety, and substitute therefor revised Section 01 20 00 AMEND 0005 dated 28 May 2024.

SECTION 01 53 11

e. ALL PAGES. Delete Section 01 53 11 in its entirety, and substitute therefor revised Section 01 53 11, AMEND 0005 dated 28 May 2024.

ATTACHMENTS: Schedule of Prices; Section 01 11 00; Section 01 20 00, and

Section 01 53 11.

SOLICITATION NO.: W912DS24B0006

E3TRYLCK202201

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 11 00

SUMMARY OF WORK

PART 1 GENERAL

1.1 SUMMARY OF WORK

1.2 PROJECT LOCATION

PART 2 PRODUCTS

PART 3 EXECUTION

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28 MAY 2024

SECTION 01 11 00

SUMMARY OF WORK

PART 1 GENERAL

1.1 SUMMARY OF WORK

The work includes, but is not limited to, furnishing, transporting, placing and dewatering cofferdams, demolition, concrete work and underwater concrete, fabrications, painting, surveying, stoplogs, dive inspection and video inspection, and site restoration.

1.2 PROJECT LOCATION

The work is located at Hudson River, Troy, Rensselaer County, New York, and as indicated.

PART 2 PRODUCTS

Not Used

PART 3 EXECUTION

Not Used

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28 MAY 2024

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 20 00

PRICE AND PAYMENT PROCEDURES

PART 1 GENERAL

1.1 JOB PAYMENT ITEMS

1.1.1 Mobilization and Demobilization

1.1.1.1 Payment

1.1.1.2 Unit of Measure

1.1.2 Survey

1.1.2.1 Payment

1.1.2.2 Unit of Measure

1.1.3 Diving

1.1.3.1 Payment

1.1.3.2 Unit of Measure

1.1.4 Cofferdam Work

1.1.4.1 Payment

1.1.4.2 Unit of Measure

1.1.5 Electrical Work

1.1.5.1 Payment

1.1.5.2 Unit of Measure

1.1.6 Recess Work

1.1.6.1 Payment

1.1.6.2 Unit of Measure

1.1.7 Protection Plate Fabrication

1.1.7.1 Payment

1.1.7.2 Unit of Measure

1.1.8 Lifting Beam Guide Block Installation

1.1.8.1 Payment

1.1.8.2 Unit of Measure

1.1.9 Stoplog Work

1.1.9.1 Payment

1.1.9.2 Unit of Measure

1.1.10 Trash Rack Work

1.1.10.1 Payment

1.1.10.2 Unit of Measure

1.1.11 Handrailing Replacement

1.1.11.1 Payment

1.1.11.2 Unit of Measure

1.1.12 Site Restoration

1.1.12.1 Payment

1.1.12.2 Unit of Measure

1.2 UNIT PRICE PAYMENT ITEMS

1.2.1 Temporary Construction Facilities

1.2.1.1 Payment

1.2.1.2 Measurement

1.2.1.3 Unit of Measure

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1.2.3 Stoplog Recess Concrete Placement

1.2.3.1 Payment

1.2.3.2 Measurement

1.2.3.3 Unit of Measure

PART 2 PRODUCTS

PART 3 EXECUTION

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1.2.2 Stoplog Recess Concrete Removal

1.2.2.1 Payment

1.2.2.2 Measurement

1.2.2.3 Unit of Measure

SECTION 01 20 00

PRICE AND PAYMENT PROCEDURES

PART 1 GENERAL

1.1 JOB PAYMENT ITEMS

Payment items for the work of this Contract for which Contract job payments will be made are listed in the SCHEDULE OF PRICES and as specified. All costs for items of work, which are not specifically mentioned to be included in a particular job price payment item, are included in the listed job item most closely associated with the work involved. The job price and payment made for each item listed constitutes full compensation for furnishing all plant, labor, materials, and equipment, and performing any associated Contractor quality control, environmental protection, meeting safety requirements, tests and reports, and for performing all work required for which separate payment is not otherwise provided.

1.1.1 Mobilization and Demobilization

1.1.1.1 Payment

Mobilization and demobilization for all plant and equipment, materials, tools, and supplies will be made for Item No. 0001, "Mobilization and Demobilization." Mobilization consists of all costs required, as applicable, to prepare plant and equipment for shipment, hauling, supplies, and any incidental to the work site. Demobilization consists of all costs required to break-down and remove all plant, equipment, unused supplies, and incidentals from the work site. A payment of 60 percent of the awarded job price upon completion of mobilization to the work site.

The remaining 40 percent will be paid upon completion of post-construction survey and site demobilization at the end of the Contract. Failure to justify such price to the satisfaction of the Contracting Officer may result in payment of actual mobilization costs, as determined by the Contracting Officer at the completion of mobilization and actual demobilization costs, as determined by the Contracting Officer at the completion of demobilization and payment of the remainder in the final payment. Construction bonds, with proof of a paid invoice, may be paid under this payment item. Contractor to demobilize at the end of each construction season. Contractor equipment may not be left on site in-between construction seasons.

1.1.1.2 Unit of Measure

Unit of measure: job.

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1.1.2 Survey

1.1.2.1 Payment

Payment for all costs associated with surveying and generating the stoplog recess centerline at the project site, such price will constitute full payment to include, but not be limited to, labor, equipment, and incidentals required and associated with the survey, will be made for Item No. 0003, "Surveying."

1.1.2.2 Unit of Measure

Unit of measure: job.

1.1.3 Diving

1.1.3.1 Payment

Payment for all costs associated with all diving and dive inspection work will be made for Item No. 0004, "Diving."

1.1.3.2 Unit of Measure

Unit of measure: job.

1.1.4 Cofferdam Work

1.1.4.1 Payment

Payment for all costs associated with lock chamber debris removal, furnishing, transporting, installing and removing cofferdams, sealing, dewatering, and maintaining in dewatered state will be made for Item No.

0005, "Cofferdam Work."

1.1.4.2 Unit of Measure

Unit of measure: job.

1.1.5 Electrical Work

1.1.5.1 Payment

Payment for all costs associated with locating electrical cables, disconnecting and reconnecting electrical power, providing temporary power, and incidentals will be made for Item No. 0006 "Electrical Work."

1.1.5.2 Unit of Measure

Unit of measure: job.

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1.1.6 Recess Work

1.1.6.1 Payment

Payment for all costs associated with providing stoplog recess frames including, but not limited to, metalwork, welding, and painting will be made for Item No. 0009, "Recess Work."

1.1.6.2 Unit of Measure

Unit of measure: job.

1.1.7 Protection Plate Fabrication

1.1.7.1 Payment

Payment for all costs associated with stoplog recess protection plate assemblies will be made for Item No. 0010, "Protection Plate Fabrication."

1.1.7.2 Unit of Measure

Unit of measure: job.

1.1.8 Lifting Beam Guide Block Installation

1.1.8.1 Payment

Payment for all costs associated with installing UHMW-PE guide blocks on the existing lifting beam and associated items, including touch-up paint, will be made for Item No. 0011, "Lifting Beam Guide Block Installation."

1.1.8.2 Unit of Measure

Unit of measure: job.

1.1.9 Stoplog Work

1.1.9.1 Payment

Payment for all costs associated with placing furnished stoplogs will be made for Item No. 0012, "Stoplog Work."

1.1.9.2 Unit of Measure

Unit of measure: job.

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1.1.10 Trash Rack Work

1.1.10.1 Payment

Payment for all costs associated with upstream trash racks, support beams, and embedded metals, including, but not limited to, concrete removal including embedded metals, concrete placement, fabricating trash rack grating, painting, installing support beams, and installing trash racks will be made for Item No. 0013, "Trash Rack Work."

1.1.10.2 Unit of Measure

Unit of measure: job.

1.1.11 Handrailing Replacement

1.1.11.1 Payment

Payment for all costs associated with handrailing, fabricating, packaging, delivering, and incidentals, including painting, will be made for Item No.

0014, "Handrailing Replacement."

1.1.11.2 Unit of Measure

Unit of measure: job.

1.1.12 Site Restoration

1.1.12.1 Payment

Payment for all costs associated with restoring the site and staging areas to original or better condition includes, but is not limited to, seeding and debris removal will be made for Item No. 0015, Site Restoration."

1.1.12.2 Unit of Measure

Unit of measure: job.

1.2 UNIT PRICE PAYMENT ITEMS

Payment items for unit price payments will be made in the SCHEDULE OF PRICES and as specified. The unit price and payment made for each item will constitute full compensation for furnishing all plant, labor, materials, and equipment, and performing any associated quality control, environmental protection, meeting safety requirements, tests and reports, and for performing all work required for each unit price item.

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1.2.1 Temporary Construction Facilities

1.2.1.1 Payment

Payment for all costs associated with providing a temporary field office, furnishings, utilities, and paid monthly for field office will be made for:

Item No. 0002AA, "First 6 Months" and

Item No. 0002AB, "Over 6 Months" as applicable.

1.2.1.2 Measurement

Facilities will be paid for throughout the Contract duration on a monthly basis once facilities are on-site and occupied. Facilities to be demobilized in-between construction seasons.

1.2.1.3 Unit of Measure

Unit of measure: month.

1.2.2 Stoplog Recess Concrete Removal

1.2.2.1 Payment

Payment for all costs associated with concrete removal for stoplog recess including embedded metals and disposal materials will be made for:

Item No. 0007AA, "First 50 Cubic Yards" and

Item No. 0007AB, "Over 50 Cubic Yards;" as applicable.

1.2.2.2 Measurement

Measurement will be made to the nearest cubic yard and and will be measured in the field by the Contractor and approved by the Contracting Officer.

1.2.2.3 Unit of Measure

Unit of measure: cubic yard.

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1.2.3 Stoplog Recess Concrete Placement

1.2.3.1 Payment

Payment for all costs associated with placing concrete for stoplog recess will be made for:

Item No. 0008AA, "First 70 Cubic Yards" and

Item No. 0008AB, "Over 70 Cubic Yards;" as applicable.

1.2.3.2 Measurement

Measurement will be made as indicated on material delivery tickets or as approved by Contracting Officer.

1.2.3.3 Unit of Measure

Unit of measure: cubic yard.

PART 2 PRODUCTS

Not Used

PART 3 EXECUTION

Not Used

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SECTION 01 20 00 Page 8 AMEND 0005

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 53 11

PROTECTION, DEWATERING, AND DEBRIS REMOVAL

PART 1 GENERAL

1.1 SUBMITTALS

1.2 HISTORY OF LOCK CHAMBER DEWATERINGS

PART 2 PRODUCTS

2.1 GOVERNMENT FURNISHED DEWATERING STRUCTURES

2.1.1 Lock Chamber Stoplogs

2.2 CONTRACTOR-FURNISHED DEWATERING ITEMS

2.2.1 Stair Towers

2.2.2 Cofferdams

PART 3 EXECUTION

3.1 DEWATERING COORDINATION MEETING

3.2 STOPLOG RECESS PROTECTION PLATE ASSEMBLIES REMOVE/REINSTALL

3.3 WALKWAYS ACROSS STOPLOGS

3.4 LOCK CHAMBER MONITORING DURING DEWATERING

3.4.1 Contracting Officer Monitoring

3.4.2 Contractor Monitoring

3.5 REMOVAL OF MATERIAL FROM AREAS TO BE DEWATERED

3.6 EMERGENCY REWATERING OF LOCK CHAMBER

3.7 COFFERDAM INSTALLATION AND DEWATERING PLAN

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SECTION 01 53 11

PROTECTION, DEWATERING, AND DEBRIS REMOVAL

PART 1 GENERAL

1.1 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Cofferdam Installation and Dewatering Plan; G ECDL

Cofferdams; G ECDL

Submit detailed drawings, calculations, and other pertinent data related to the design and construction of dewatering structures.

1.2 HISTORY OF LOCK CHAMBER DEWATERINGS

Troy Lock is regularly dewatered during winter for maintenance purposes.

There is no information on the requirements to dewater and maintain the lock chamber, however, the multiple previous lock dewaterings suggests that there are no seepage or scour issues present.

PART 2 PRODUCTS

2.1 GOVERNMENT FURNISHED DEWATERING STRUCTURES

2.1.1 Lock Chamber Stoplogs

Stoplogs for the downstream stoplogs recess will be Government furnished.

The downstream dewatering structure to consist of several stoplog sections, stacked on top of one another. There are 21 stoplogs which, when stacked, form the downstream stoplogs Each stop log weighs approximately 6,500 lbs and dimensions of 48.5'L x 2.75'W x 33"H. A joint inspection of the stoplog sections will be performed and documented by the Contractor and Contracting Officer to ascertain their condition prior to use by the Contractor.

Additionally, a single pickup beam for the stoplogs will be Government furnished. The pickup beam weighs approximately 3,200 lbs.

The stoplogs are stored at Troy Lock. Install and maintain the stoplogs during the first closure until downstream stoplog recesses are complete, stoplogs have been installed and inspected, and lock has been dewatered;

after which the Contractor leaves the stoplogs in place in the stoplog recess and turns over site control to the Government. The Government will perform all stoplog operations during second closure.

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2.2 CONTRACTOR-FURNISHED DEWATERING ITEMS

2.2.1 Stair Towers

Provide stair towers in accordance with USACE EM 385-1-1.

Stair towers are required for second dewatering only.

2.2.2 Cofferdams

Furnish cofferdam(s) in accordance with USACE technical manuals, safety manuals, and applicable design codes such as AISC and AWS D1.1/D1.1M.

Cofferdam(s) must be sufficient in design and quantity to allow work to commence on both downstream bulkhead slots simultaneously. Submit the plan and detailed design of the dewatering structures, including possible walkways and handrails, as applicable, for approval a minimum of 45 days prior to start of construction of items. Perform proposed dewatering structure designs by a licensed Professional Structural Engineer with experience in designing dewatering structures and indicate on the submitted design with the Structural Engineer's signed stamp. The cofferdam design must consider the following minimum requirements:

a. Design for water when the top of the structure is in a dewatered state, to provide the maximum hydraulic force on the structure.

Cofferdam height extensions are prohibited unless specifically included in the design.

b. Include a 5 kip per lineal foot ice load acting in a location to provide maximum stress.

c. Include impact loads from falling debris and external forces such as floating debris.

d. Include consideration for uplift forces on the cofferdam.

e. Include considerations for securing the cofferdam to the existing structure, noting the existing concrete at the site was not air-entrained and constructed over 75 years ago, and condition of the concrete is unknown and may include cracking, spalling, and other forms of deterioration.

f. Include considerations for sealing of cofferdam on surfaces that are cracked, spalled, or have other forms of deterioration.

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Design dewatering structures to fit the areas for work performed in the dry.

PART 3 EXECUTION

3.1 DEWATERING COORDINATION MEETING

Hold a preliminary meeting with Contracting Officer personnel directly involved with the dewatering effort approximately seven calendar days in advance of beginning dewatering operations at the site, for coordination with the Contractor on schedule, sequence, fleet management, and other issues directly related to the dewatering of the lock chamber.

3.2 STOPLOG RECESS PROTECTION PLATE ASSEMBLIES REMOVE/REINSTALL

There are wooden and steel protection plate assemblies within each of the two stoplog recesses which require removal to accommodate placement of stoplogs in the recesses.

3.3 WALKWAYS ACROSS STOPLOGS

If necessary, provide walkway across the downstream stoplogs to allow personnel access from the land wall to the river wall. Walkways used for personnel access only, and equipment or materials are not allowed across the walkways. Design walkways in accordance with USACE EM 385-1-1. The walkways may not be attached to the stoplogs by permanent methods (i.e., drilling holes thru stoplogs or welding to stoplogs). Design the downstream stoplog walkway for quick removal in case of necessity for emergency rewatering. Inspect walkways throughout use, and maintain or repair walkways in accordance as specified, indicated, and by EM 385-1-1.

3.4 LOCK CHAMBER MONITORING DURING DEWATERING

3.4.1 Contracting Officer Monitoring

During lock drawdown for dewatering, Contracting Officer will monitor the floor of the lock for boils or unusual wall movement. If floor slab heaving or any structural distress due to uplift pressures are detected, the Contracting Officer will immediately work with the Contractor to evacuate the chamber and the Government will rewater the lock chamber.

During the dewatering, the Contracting Officer will be monitoring the observation wells installed on an hourly basis during the lock dewatering drawdown, and then daily thereafter for the entire dewatering period.

Maintain access to the observation wells, as well as a 5-foot x 5-foot area around the well for Contracting Officer use. The Contracting Officer may place physical continuous monitoring devices during the dewatering at the observation wells which will take up the entire 5-foot x 5-foot area.

Plan construction activities to avoid disturbance or damage to equipment.

3.4.2 Contractor Monitoring

After completion of the dewatering, the Contractor and Contracting Officer to monitor the floor of the lock for boils or unusual wall movement. If floor slab heaving or any structural distress due to uplift pressures are detected, immediately evacuate the chamber. The Government will rapidly fill the chamber with water.

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3.5 REMOVAL OF MATERIAL FROM AREAS TO BE DEWATERED

Remove all debris and materials in the lock chamber in the areas to be used for cofferdam placement and dewatering prior to underwater concrete placement. All debris and material is to be disposed off-site. Items that may be found include, but are not limited to, rocks, organic materials such as trees, silt, and man-made items such as wire rope, chain binders, recreational boating item, and any other items considered debris. If any hazardous materials, debris, or waste are encountered, work must immediately cease and the Contracting Officer notified. Refer to Section 01 57 19 TEMPORARY ENVIRONMENTAL CONTROLS, for removal/disposal of found hazardous materials, debris, or waste.

Remove zebra mussels from all equipment, existing structures, and dewatered floor areas prior to re-entry of water. Properly dispose to a landfill area in a manner that will not allow the mussels to re-enter the water.

3.6 EMERGENCY REWATERING OF LOCK CHAMBER

In the event of structural instability of the lock chamber during dewatering, or other conditions where the integrity of the structure is in jeopardy, the Government will rapidly fill chamber to alleviate the distress by removing the downstream lock chamber bulkheads. Remove all equipment and materials, including any walkway structures located on the bulkheads, within 30 minutes of notice by the Contracting Officer.

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3.7 COFFERDAM INSTALLATION AND DEWATERING PLAN

Submit a comprehensive plan detailing the work items to be completed, the proposed time for accomplishing work, the method proposed to install the dewatering structures with approved anchors, the method proposed to dewater the areas in which work is to be performed in the dry, the method proposed to seal leakage around or through the dewatering structures, through cracks/joints in the concrete which may leak and where existing structures have concrete spalling in the areas of the cofferdam seals, and the method to keep ice away from the cofferdams. Submit the dewatering plan a minimum 45 days prior to the closure period. Submit the seals that will be used on the cofferdams.

a. In addition to installing the cofferdams, provide, operate, and maintain all pumps and other equipment necessary to maintain the cofferdams, in the dry, in dewatered condition.

b. Submit dewatering layouts plans as part of the cofferdam dewatering plan and revised in accordance with site conditions. Dewatering designs and the capacity of equipment in accordance with sound engineering practice. Hydraulically driven pumps are prohibited for dewatering.

c. Contractor will be present at all times during cofferdam dewatering and rewatering of the areas in which work is to be performed in the dry. During the time the work areas are dewatered and when a Contractor representative is not on the job site during Contractor working hours, the Contractor will ensure that a Contractor representative can be contacted via telephone at all times by Contracting Officer personnel. If requested by the Contracting Officer, the Contractor representative will be able to be present on the project site within 1/2 hour after the request is made.

d. During and after completion of cofferdam dewatering, monitor the dewatering structures for instability or unusual movement on a daily basis, prior to entering the cofferdam. Monitoring consists of, but not limited to, visually inspecting the cofferdam for changes in leakage amounts, movement of the structure, and impact damage. The Contracting Officer will provide oversight on the Contractor's evaluation and monitor the dewatering structure with emphasis on worker protection and dam structure integrity. If any structural distress is detected, the dewatering structure will be immediately evacuated and the Contractor to immediately notify the Contracting Officer.

e. Address provisions to control leakage around the cofferdam and through joints in the existing concrete structure.

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