02 41 00 AMEND4.pdf

LD2GWREPAIR W912ES-24-B-0012

PROJECT TABLE OF CONTENTS

DI VI SI ON 01 - GENERAL REQUI REMENTS

01 00 00.00 13 GENERAL

01 11 00 SUMMARY OF WORK

01 14 00.00 13 WORK RESTRICTIONS

01 22 00.00 10 MEASUREMENT AND PAYMENT

01 32 01.00 10 PROJECT SCHEDULE

01 33 00 SUBMITTAL PROCEDURES

01 35 26 GOVERNMENTAL SAFETY REQUIREMENTS

01 41 26.00 13 MINNESOTA NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM

01 42 00 SOURCES FOR REFERENCE PUBLICATIONS

01 45 00.15 10 RESIDENT MANAGEMENT SYSTEM CONTRACTOR MODE (RMS CM)

01 45 04.00 13 CONTRACTOR QUALITY CONTROL

01 50 02.00 13 TEMPORARY CONSTRUCTION FACILITIES

01 57 20.00 13 ENVIRONMENTAL PROTECTION

01 78 02.00 10 CLOSEOUT SUBMITTALS

DI VI SI ON 02 - EXI STI NG CONDI TI ONS

02 41 00 DEMOLITION

DI VI SI ON 03 - CONCRETE

03 30 00 CAST-IN-PLACE CONCRETE

DI VI SI ON 05 - METALS

05 50 13 MISCELLANEOUS METAL FABRICATIONS

05 52 00 METAL RAILINGS

DI VI SI ON 26 - ELECTRI CAL

26 05 00.00 40 COMMON WORK RESULTS FOR ELECTRICAL

-- End of Project Table of Contents --

PROJECT TABLE OF CONTENTS Page 1 Aug 08, 2024 AMENDMENT 4 - SOLICITATION

SECTION TABLE OF CONTENTS

DIVISION 02 - EXISTING CONDITIONS

SECTION 02 41 00

DEMOLITION

PART 1 GENERAL

1.1 REFERENCES

1.2 PROJECT DESCRIPTION

1.2.1 Definitions

1.2.1.1 Demolition

1.2.2 Demolition Plan

1.2.3 General Requirements

1.3 ITEMS TO REMAIN IN PLACE

1.3.1 Existing Construction Limits and Protection

1.3.2 Utility Service

1.3.3 Facilities

1.4 BURNING

1.5 SUBMITTALS

1.6 QUALITY ASSURANCE

1.6.1 Dust and Debris Control

1.7 PROTECTION

1.7.1 Protection of Personnel

1.8 EXISTING CONDITIONS

PART 2 PRODUCTS

PART 3 EXECUTION

3.1 DEWATERING

3.2 EXISTING FACILITIES TO BE REMOVED

3.2.1 General Requirements

3.2.1.1 Disconnecting Existing Utilities

3.2.2 Concrete

3.2.3 Limits of Concrete Demolition

3.2.4 Sawcutting

3.2.5 Trimming

3.2.6 Inspection of Concrete Surfaces

3.2.7 Repair of Unsound Concrete Surfaces

3.2.8 Electrical Equipment and Fixtures

3.2.8.1 Fixtures

3.2.8.2 Electrical Devices

3.2.8.3 Wiring Ducts or Troughs

3.2.8.4 Conduit and Miscellaneous Items

3.2.9 Structural Steel

3.2.10 Miscellaneous Metal

3.2.11 Salvaged Items

3.3 DISPOSITION OF MATERIAL

3.3.1 Title to Materials

3.3.2 Reuse of Materials and Equipment

SECTION 02 41 00 Page 1

3.4 CLEANUP

3.5 REUSE OF SALVAGED ITEMS

-- End of Section Table of Contents --

SECTION 02 41 00 Page 2

SECTION 02 41 00

DEMOLITION

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN SOCIETY OF SAFETY PROFESSIONALS (ASSP)

ASSP A10.6 (2006) Safety & Health Program Requirements for Demolition Operations - American National Standard for Construction and Demolition Operations

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 385-1-1 (2014) Safety -- Safety and Health Requirements Manual

EM 1110-2-2503 (1990) Design of Sheet Pile Cellular Structures Cofferdams and Retaining Structures

1.2 PROJECT DESCRIPTION

1.2.1 Definitions

1.2.1.1 Demolition

Demolition is the process of tearing apart and removing any feature of a facility together with any related handling and disposal operations.

1.2.2 Demolition Plan

Demolition Plan is the planned steps and processes for managing demolition activities and identifying the required sequencing activities and disposal mechanisms.

Prepare a Demolition Plan and submit proposed demolition and removal procedures for approval before work is started. Include in the plan procedures for careful removal and disposition of materials specified to be salvaged, coordination with other work in progress, a disconnection schedule of utility services a detailed description of methods and equipment to be used for each operation and of the sequence of operations. Provide procedures for safe conduct of the work in accordance with EM 385-1-1 . The plan must also include a Dewatering Plan . Plan must be approved by Contracting Officer prior to work beginning.

1.2.3 General Requirements

Do not begin demolition until authorization is received from the

SECTION 02 41 00 Page 3

Contracting Officer. Remove rubbish and debris from the project site.

The work includes demolition, salvage of identified items and materials, and removal of resulting rubbish and debris. Remove rubbish and debris from Government property daily, unless otherwise directed. Store materials that cannot be removed daily in areas specified by the Contracting Officer. In the interest of occupational safety and health, perform the work in accordance with EM 385-1-1 .

1.3 ITEMS TO REMAIN IN PLACE

Comply with FAR 52.236-9 to protect existing structures, equipment, utilities, and improvements. Protect existing vegetation at the staging area. Coordinate the work of this section with all other work indicated.

Construct and maintain shoring, bracing, and supports as required. Ensure that structural elements are not overloaded. Increase structural supports or add new supports as may be required as a result of any cutting, removal, or demolition work performed under this contract. Do not overload structural elements. Provide new supports and reinforcement for existing construction weakened by demolition,or removal work. Repairs, reinforcement, or structural replacement require approval by the Contracting Officer prior to performing such work.

1.3.1 Existing Construction Limits and Protection

Do not disturb existing construction beyond the extent indicated or necessary for installation of new construction. Provide temporary shoring and bracing for support of building components to prevent settlement or other movement. Provide protective measures to control accumulation and migration of dust and dirt in all work areas. Remove snow, dust, dirt, and debris from work areas daily.

1.3.2 Utility Service

Maintain existing utilities indicated to stay in service and protect against damage during demolition operations. The Contractor must coordinate with the Contracting Officer and Lock Master to shut off and disconnect utilities serving each area of alternation or removal.

1.3.3 Facilities

Protect electrical and mechanical services and utilities. Where removal of existing utilities and pavement is specified or indicated, provide approved barricades, temporary covering of exposed areas, and temporary services or connections for electrical and mechanical utilities. Floors, roofs, walls, columns, pilasters, and other structural components that are designed and constructed to stand without lateral support or shoring, and are determined to be in stable condition, must remain standing without additional bracing, shoring, or lateral support until demolished or deconstructed, unless directed otherwise by the Contracting Officer.

Ensure that no elements determined to be unstable are left unsupported and place and secure bracing, shoring, or lateral supports as may be required as a result of any cutting, removal, or demolition work performed under this contract.

1.4 BURNING

The use of burning at the project site for the disposal of refuse and debris will not be permitted.

SECTION 02 41 00 Page 4

1.5 SUBMITTALS

Government approval is required for submittals with a "G"classification.

Submittals not having a "G" classification are for information only. When used, a code following the "G" classification 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

Dewatering Plan ; G

Existing Conditions ; G

Demolition Plan ; G

SD-07 Certificates

Notification ; G

SD-11 Closeout Submittals

Receipts

1.6 QUALITY ASSURANCE

Comply with federal, state, and local hauling and disposal regulations.

In addition to the requirements of the "Contract Clauses," conform to the safety requirements contained in ASSP A10.6 . Comply with the Environmental Protection Agency requirements specified. Use of explosives will not be permitted.

1.6.1 Dust and Debris Control

Prevent the spread of dust and debris and avoid the creation of a nuisance or hazard in the surrounding area. Do not use water if it results in hazardous or objectionable conditions such as, but not limited to, ice, flooding, or pollution.

1.7 PROTECTION

1.7.1 Protection of Personnel

Before, during and after the demolition work continuously evaluate the condition of the structure being demolished and take immediate action to protect all personnel working in and around the project site. No area, section, or component of floors, roofs, walls, columns, pilasters, or other structural element will be allowed to be left standing without sufficient bracing, shoring, or lateral support to prevent collapse or failure while workmen remove debris or perform other work in the immediate area.

1.8 EXISTING CONDITIONS

Before beginning any demolition work, survey the site and examine the drawings and specifications to determine the extent of the work. Record existing conditions in the presence of the Contracting Officer showing the condition of structures and other facilities adjacent to areas of alteration or removal. Photographs or electronic images with a minimum

SECTION 02 41 00 Page 5 resolution of 3072 x 2304 pixels, capable of a print resolution of 300 dpi, will be acceptable as a record of existing conditions. Include in the record the elevation of the top of foundation walls, finish floor elevations, possible conflicting electrical conduits, plumbing lines, alarms systems, the location and extent of existing cracks and other damage and description of surface conditions that exist prior to starting work. It is the Contractor's responsibility to verify and document all required outages which will be required during the course of work, and to note these outages on the record document. Submit survey results to the Contracting Officer.

PART 2 PRODUCTS

This section is not used.

PART 3 EXECUTION

3.1 DEWATERING

Dewater to expose the portion of Monolith UG25 that is currently underwater. The dewatering must be to a minimum elevation of 680 to provide for adequate inspection. In addition the dewatering must be adequate to allow for the proper removal and placement of concrete according to these plans and specifications. Dewatering must be in accordance with cofferdam guidance from USACE EM 1110-2-2503 and also meet environmental standards from Specification Section 01 41 26.00 13 MINNESOTA NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM. The dewatering system must be removed after the project is complete.

Submit the dewatering plan for review a minimum of 30 days before beginning the work. Submit drawings and calculations for review, certified by a licensed professional engineer, describing the methods for dewatering and any required temporary structures. The dewatering method must be designed in a manner to preclude heaving, movement, or piping of soil around the existing guidewall foundation. Government review of the dewatering or temporary structures does not relieve the contractor of full responsibility for the adequacy or safety of the dewatering and associated temporary structures.

3.2 EXISTING FACILITIES TO BE REMOVED

Inspect and evaluate existing structures onsite for reuse. Disassemble existing construction scheduled to be removed for reuse. Dismantled and removed materials are to be separated, set aside, and prepared as specified, and stored or delivered to a collection point for reuse, remanufacture, recycling, or other disposal, as specified. Designate materials for reuse onsite whenever possible.

3.2.1 General Requirements

Do not interrupt existing utilities serving occupied or used facilities, except when authorized in writing by the Contracting Officer. Do not interrupt existing utilities serving facilities occupied and used by the Government except when approved in writing and then only after temporary utility services have been approved and provided. Do not begin demolition or deconstruction work until all utility disconnections have been made.

Shut off and cap utilities for future use, as indicated.

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3.2.1.1 Disconnecting Existing Utilities

Remove existing utilities as indicated and terminate in a manner conforming to the nationally recognized code covering the specific utility and approved by the Contracting Officer. When utility lines are encountered but are not indicated on the drawings, notify the Contracting Officer prior to further work in that area. Remove meters and related equipment and deliver to a location in accordance with instructions of the Contracting Officer.

3.2.2 Concrete

Saw and or break monolith UG25 into pieces as necessary to remove and disposal of off site. This must be accomplished without causing any further damage to the remaining portions of the guidewall. The weight restriction for the impact hammer used on the portions of the guidewall to remain after demolition is 15 pounds maximum(monolith UG24 and below elevation 680.0 on monolith UG25).

3.2.3 Limits of Concrete Demolition

Remove concrete from monoliths to the limits shown on drawings. Upon completion of any and all concrete removal, the Contractor must confirm the limits of demolition by inspection. The inspection must be performed in the presence of the Contracting Officer and provide 5 working days notice prior to the date of inspection. Any additional concrete removal required as a result of the inspection must be done at no additional cost to the Government. No additional payment will be made for material removed beyond the removal limits (overbreak) nor for the extra effort and material to restore the area.

3.2.4 Sawcutting

Sawcutting to required depth must be used where shown on drawings. On vertical surfaces which will be exposed after construction and where new concrete will meet existing concrete which remains, the concrete surface must be sawcut before concrete removal to produce a clean line between new and existing concrete.

3.2.5 Trimming

Sufficient concrete must be removed at edges of demolition areas to prevent feather edges when new concrete is placed. Sharp protuberances of concrete above the surrounding area must be removed. All 90-degree or sharper corners in existing concrete which remain after demolition and are to be surrounded by new concrete are to be broken to remove sharp corners.

Minimum acceptable break is a 3-inch x 3-inch chamfer. Do not chamfer saw edges.

3.2.6 Inspection of Concrete Surfaces

Inspect, in the presence of the Contracting Officer, any and all concrete surfaces that remain after demolition. The method of inspection shall be sounding with a geologist's hammer and other means of non-destructive testing noting unsound areas such as delaminated or cracked concrete surfaces. Notify the Contracting Officer 5 working days prior to inspection of concrete surfaces. Findings must be submitted for record to the Contracting Officer for file or action as appropriate. The

SECTION 02 41 00 Page 7 submittal must include narrative and sketches including location and size of deficiency.

3.2.7 Repair of Unsound Concrete Surfaces

When inspection of concrete surfaces resulting from demolition indicates that unsound concrete remains, remove unsound concrete by mechanical means until the resulting surface is sound, as indicated by a second inspection.

Removal of concrete which was rendered unsound by demolition efforts, and subsequent reinspection, must be at the Contractor's expense.

3.2.8 Electrical Equipment and Fixtures

Salvage wiring systems and components. Box loose items and tag for identification. Disconnect primary, secondary, control, communication, and signal circuits at the point of attachment to their distribution system.

3.2.8.1 Fixtures

Remove and salvage electrical fixtures. Salvage unprotected glassware from the fixture and salvage separately. Salvage incandescent, mercury-vapor, and fluorescent lamps and fluorescent ballasts manufactured prior to 1978, boxed and tagged for identification, and protected from breakage.

3.2.8.2 Electrical Devices

Remove and salvage switches, switchgear, transformers, conductors including wire and nonmetallic sheathed and flexible armored cable, regulators, meters, instruments, plates, circuit breakers, panelboards, outlet boxes, and similar items. Box and tag these items for identification according to type and size.

3.2.8.3 Wiring Ducts or Troughs

Remove and salvage wiring ducts or troughs. Dismantle plug-in ducts and wiring troughs into unit lengths. Remove plug-in or disconnecting devices from the busway and store separately.

3.2.8.4 Conduit and Miscellaneous Items

Salvage conduit except where embedded in concrete or masonry. Consider corroded, bent, or damaged conduit as scrap metal. Sort straight and undamaged lengths of conduit according to size and type. Classify supports, knobs, tubes, cleats, and straps as debris to be removed and disposed.

3.2.9 Structural Steel

Dismantle structural steel at field connections and in a manner that prevents bending or damage to any remaining portions of the guidewall and in a manner in which the replacement pieces can be securely attached and finished.

3.2.10 Miscellaneous Metal

Dismantle or cut to remove any damage miscellaneous metals. Accomplished without causing any further damage to the remaining portions of the

SECTION 02 41 00 Page 8 guidewall and in a manner in which the replacement pieces can be securely attached and finished.

3.2.11 Salvaged Items

The light post, lights, path lights, and outdraft sign including brackets and hardware for reinstallation must be salvaged and re-installed. Before removing all other miscellaneous metal items, allow a government representative to select any items wanted for Government possession.

These items include but not limited to the cable tray, light post, signs, mooring anchors, and ladders. Government salvaged items will be stored at the Lock and Dam 2 storage yard. All unwanted items become property of the Contractor must be capitalized and must be disposed off site.

3.3 DISPOSITION OF MATERIAL

3.3.1 Title to Materials

Except for salvaged items specified in Contract Documents, and for materials or equipment scheduled for salvage, all materials and equipment removed and not reused or salvaged, become the property of the Contractor and must be removed from Government property. Materials approved for storage by the Contracting Officer must be removed before completion of the contract. Title to materials resulting from demolition, and materials and equipment to be removed, is vested in the Contractor upon approval by the Contracting Officer. The Government will not be responsible for the condition or loss of, or damage to, such property after contract award.

Showing for sale or selling materials and equipment on site is prohibited.

3.3.2 Reuse of Materials and Equipment

Remove and store materials and equipment indicated to be reused or relocated to prevent damage, and reinstall as the work progresses.

3.4 CLEANUP

Remove debris and rubbish. Apply local regulations regarding hauling and disposal.

3.5 REUSE OF SALVAGED ITEMS

Recondition salvaged materials and equipment designated for reuse before installation. Replace items damaged during removal and salvage operations or restore them as necessary to usable condition.

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SECTION 02 41 00 Page 9

1.8 EXISTING CONDITIONS