SOW_Lock 3 Comfort Station Roof Replacement final.pdf

STATEMENT OF WORK

Lock and Dam #3 – Comfort Station

Roof Replacement

1.0 Introduction

The work to be performed is at the following location:

Lock and Dam No. 3

4330 Lock and Dam Road

Welch, MN 55089

Figure 1.

Figure 2.

The onsite public restroom building, hereafter referred to as the “comfort station” is owned by the Army Corps of Engineers – MVP District and maintained by the staff of Lock and Dam 3. The comfort station is near the public parking lot outside the secured area, see figure 2 above. The structure was built in 1970 with the exterior envelope of the comfort station primarily consisting of concrete block walls and precast hollow core concrete panels as the roof deck. The existing roofing system consists of a built-up hot tar roof over 1 inch of rigid insulation. See enclosure 1 for roof details of the existing building. See enclosure 2 for pictures of the comfort station.

2.0 Scope of Work

2.1 General

The scope of work for this contract involves the removal of the existing roofing system on the Comfort Station building at Lock and Dam 3 and replacement with a new PVC roof system. The existing roof drains on the Comfort Station will be covered and abandoned and the new roofing system to be installed will include the installation of scuppers and new down spouts. Roofing slopes shall be finished so that there is no standing water on the roofs. No lock and dam operations shall be impacted by the Contractor's operations during construction.

2.2 Contractor and Government Equipment and Supplies

The contractor shall furnish all personnel, equipment, transportation, disposal, supplies and materials to perform the work. No government equipment or supplies shall be used for this project.

2.3 Pre-Bid Site Visit

Potential bidders are encouraged to visit the site prior to placing bids to ensure that they understand the existing site conditions and the potential challenges associated with completing contract work. Pre-site visits shall be coordinated through the Lock and Dam 3 Lockmaster, Tim Tabery, at 651-290-5060.

2.4 Pre-Construction Meeting

Prior to commencing work, a pre-construction meeting shall be set up by the COR after contract award. The safety plan, environmental protection plan, work plan, schedule, contractor staging area, and any other coordination issues shall be discussed. The Contractor shall submit all plans for review prior to the meeting.

2.5 Availability and Use of Utility Services

Electrical power is not available for contractor use.

The Contractor will be allowed to use the public sanitation facilities on site.

2.6 Equipment, Material, and Supply Inspections

Contractor shall provide 2 sets of shop drawings and the product data sheets for the proposed roofing system to the contracting officer or their representative prior to the pre-construction meeting.

2.7 Demolition

Do not begin demolition or deconstruction until authorization is received from the Contracting Officer or COR. Demolish all existing roofing material such that the roof deck has a clean surface on which to install the new roofing. Store materials that cannot be removed daily in areas specified by the Contracting Officer.

The Contractor shall take necessary precautions to avoid damage to existing items to remain in place, to be reused, or to remain the property of the Government. Repair or replace damaged items as approved by the Contracting Officer. Coordinate the work of this section with all other work indicated. Do not overload structural elements.

Do not disturb existing construction beyond the extent necessary for installation of new construction. Provide protective measures to control accumulation and migration of dust and dirt in all work areas.

Protect the building interior, materials, and equipment from the weather always. Have materials and workmen ready to provide adequate and temporary covering of exposed areas where existing roofing has been removed.

Maintain existing utilities to stay in service and protect against damage during demolition and deconstruction operations.

All demolished and waste materials resulting from demolition and construction operations shall become the responsibility of the Contractor and shall be properly removed, transported, and disposed from Government property. The Contractor shall take all necessary precautions to prevent the misplacement of demolished materials into the river. Any dirt or mud which is tracked onto paved or surfaced roadways shall be cleaned away. Stored material not in trailers, whether new or salvaged, shall be neatly stacked when stored. Upon completion of the project, areas used by the Contractor for the storage of equipment or material, or other use, shall be restored to the original or better condition.

Debris shall be removed and transported in a manner that prevents spillage on streets or adjacent areas. Streets, roadways, and parking lots shall be kept free from construction materials, mud, dirt, and debris of any kind. All such materials dropped or deposited on or along a streets, roadway, or parking lot shall be immediately removed. Local regulations regarding hauling and disposal shall apply.

2.8 Roof and Deck Insulation

A Tapered Polyisocyanurate Board Insulation system shall be used with either an integrated or separate vapor retarder/ air barrier as recommended by the PVC membrane manufacturer. The insulation system and facer material must be compatible with the membrane application specified and as approved by the roof membrane manufacturer.

The contractor will provide starter and filler blocks as required to provide the total thickness of insulation necessary to meet the specified slope of ¼” per foot. Mitered joints shall be factory fabricated and shall consist of two diagonally cut boards or one board shaped to provide the required slopes.

Tapered Polyisocyanurate Board Insulation: At a minimum the insulation will be a closed cell polyisocyanurate foam with fiber reinforced mat laminated to faces, complying with ASTM C 1289 Type II Class 1, with the following additional characteristics:

1. Thickness: As required to meet the specific site conditions and as required to meet ¼” per foot slope. No standing water is allowed to pond on the repaired roof.

2. Compressive Strength: Minimum 20 psi when tested in accordance with ASTM C 1289.

An elastomeric, two component, one step, all purpose, standard cold fluid-applied adhesive formulated to adhere roof insulation to substrate, or equivalent, as recommend by roofing manufacturer shall be used.

Install insulation using cold fluid-applied adhesive as per the insulation Manufacturer's recommendations. Install insulation such that the finished surface is continuous and butts up directly with the parapet wall around the outer perimeter. The finished surface of the insulation shall have a slope of not less than 1/4 inch per foot. Insulation shall be installed to create a smooth finished surface free of depressions that could pond water.

Completely cover each day's installation of insulation with the finished roofing specified on same day. Do not permit phased construction. Protect open spaces between insulation and parapets or other walls and spaces and expansion joints, until permanent roofing and flashing are applied. Provide smooth, clean board or plank walkways, runways, and platforms near supports, as necessary, to distribute weight. Exposed edges of the insulation shall be protected by the end of each workday, or whenever precipitation is imminent.

2.9 (PVC) Roofing

The product used shall be a Polyvinyl Chloride (PVC), single ply membrane with a nominal 80 mil thickness meeting or exceeding ASTM D 4434 Type II standards. The minimum thickness must not be less than minus 10 percent of the specified thickness value. Width and length of sheet must be maximum width attainable as recommended by the manufacturer to minimize field formed seams in the field of the roof.

The contractor shall heat weld seams to the maximum extent practical as recommended by the manufacturer and where not practical the contractor will use the membrane manufacturer approved products and adhesion methods for the specific roofing system being installed.

The complete roof covering assembly must:

a. Be Class A rated in accordance with ASTM E 108, FM 4470, or UL 790; and

b. Be listed as part of Fire-Classified roof deck construction in the UL RMSD or Class I roof deck construction in the FM APP GUIDE.

FM or UL approved components of the roof covering assembly must bear the appropriate FM or UL label.

The complete roof covering assembly, including insulation, must be rated Class 1-90 in accordance with FM APP GUIDE capable of withstanding an uplift pressure of 90 psf. Do not install non-rated systems, except as approved by the Contracting Officer. Provide manufacturers wind load calculations or certification to validate wind resistance of any non-rated roof system.

Wind uplift calculations shall be based on a design wind speed of 90 mph in accordance with ASCE/SEI 7-05 or applicable building code requirements.

Do not install PVC roofing during high winds or inclement weather, or when there is ice, frost, moisture, or visible dampness on the substrate surface, or when condensation develops on surfaces during application. Unless recommended otherwise by the PVC sheet manufacturer and approved by the Contracting Officer, do not install PVC sheet when air temperature is below 40 degrees F or within 5 degrees F of the dewpoint. Follow manufacturer's printed instructions for installation during cold weather conditions.

2.10 Flashing, Fascia, and Downspouts

Membrane flashing, including self-adhering membrane flashing, perimeter flashing, flashing around roof penetrations, and prefabricated pipe seals, must be compatible with the roof membrane and recommended for use by the roof membrane manufacturer.

Install flashing and flashing accessories as the roof membrane is installed. Apply flashing to cleaned surfaces and as recommended by the roof membrane manufacturer and as specified.

Avoid field seams running through or within 24 inches of scuppers, or as otherwise recommended by the roof membrane manufacturer.

Install new fascia and downspouts to match the existing color. The new downspouts will be open faced and sized according to industry standard. The contractor will provide all supplies and hardware necessary for the installation of all flashing, fascia, and downspouts.

2.11 Membrane Manufacturer and Applicator Experience

The PVC roofing membrane manufacturer must have at least 5 years’ experience in manufacturing PVC roofing products.

Roofing system applicator must be approved, authorized, or licensed in writing by the roof membrane manufacturer and must have a minimum of three years’ experience as an approved, authorized, or licensed applicator with that manufacturer and be approved at a level capable of providing the specified warranty.

Coordinate the work to ensure that components which are to be secured to or stripped into the roofing system are available and that permanent flashing is installed as the work progresses.

Ensure temporary protection measures are in place to preclude moisture intrusion or damage to installed materials. Application of roofing must immediately follow application of insulation as a continuous operation. Coordinate roofing operations with insulation work so that all roof insulation applied each day is covered with roof membrane installation the same day.

2.12 Leakage Test

The PVC membrane roof system shall be tested in accordance with the manufactures recommended test for leakage. If leakage is found, the membrane shall be repaired at no additional cost to the Government and the roof retested.

2.13 Warranty

Furnish the PVC system manufacturer's warranty for a minimum of 20 years. The warranty shall cover the roofing system to include but not limited to, roofing membrane, flashing, insulation, inspection fees, replacement/repair expenses. The warranty shall provide that the system will not deteriorate under normal wear and tear conditions such that the system fails to provide a watertight condition during the warranty period. The warranty period shall commence on the date of acceptance of the roofing system. The warranty shall run directly to the Government.

2.14 Roofing System Installation Warranty

Warrant for a period of not less than two years that the roof system, as installed, is free from defects in installation workmanship, to include the roof membrane, flashing, insulation, accessories, attachments, and sheet metal installation integral to a complete watertight roof system assembly. The warranty must run directly to the Government. The Contractor is responsible for correction of defective workmanship and replacement of damaged or affected materials. The Contractor is responsible for all costs associated with the repair or replacement work.

3.0 Safety Requirements

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 ENGINEERS (ASSE/SAFE)

ASSE/SAFE A10.32 (2012) Fall Protection

ASSE/SAFE A10.34 (2001; R 2012) Protection of the Public on or Adjacent to Construction Sites

ASSE/SAFE Z359.1 (2007) Safety Requirements for Personal Fall Arrest Systems, Subsystems and Components

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70E (2015; ERTA 1 2015) Standard for Electrical Safety in the Workplace

U.S. ARMY CORPS OF ENGINEERS (USACE) EM 385-1-1 (2024) Safety and Health Requirements Manual

U.S. NATIONAL ARCHIVES AND RECORDS ADMINISTRATION (NARA)

29 CFR 1926.16 Rules of Construction

29 CFR 1926.500 Fall Protection

3.1 Contractor Safety Requirements

If the Contractor fails or refuses to promptly comply with safety and security requirements as specified herein, any project employee may stop all or part of the work until satisfactory corrective action has been taken. No part of the time lost due to any such work stoppage shall be made subject to any claims for extension of time or for excess costs or damages sustained by the Contractor. Also, the Contractor will not be paid for work not performed as a result of the stop order.

3.2 Emergency Medical Treatment

Contractors will arrange for their own emergency medical treatment. The government has no responsibility to provide emergency medical treatment.

3.3 Accident Prevention Plan

The Contractor shall prepare an Accident Prevention Plan utilizing the ENG Form 6293, Accident Prevention Plan (APP) Worksheet provided and according to the EM 385-1-1. All employees performing work under this contract shall wear personal protective equipment as specified in EM 385-1-1 including as a minimum safety-toed boots, hard hat, safety glasses, hearing protection, sleeved shirts, long pants, and gloves and other equipment common to trade as specified in EM 385-1-1. The ENG Form 6293, Accident Prevention Plan (APP) Worksheet is included as Enclosure 3. This plan must be accepted by the Contracting Officer’s representative prior to commencement of any work. Once accepted by the Contracting Officer, the APP and attachments will be enforced as part of the contract. Disregarding the provisions of this contract or the accepted APP will be cause for stopping of work, at the discretion of the Contracting Officer, until the matter has been rectified. Once work begins, changes to the accepted APP shall be made with the knowledge and concurrence of the Contracting Officer, project superintendent, SSHO and quality control manager. Should any severe hazard exposure, i.e., imminent danger, become evident, stop work in the area, secure the area, and develop a plan to remove the exposure and control the hazard. Notify the Contracting Officer within 24 hours of discovery. Eliminate/remove the hazard. In the interim, take all necessary action to restore and maintain safe working conditions to safeguard onsite personnel, visitors, the public (as defined by ASSE/SAFE A10.34,) and the environment.

Copies of the accepted plan will be maintained at the Contracting Officer's office and at the job site. Continuously review and amend the APP, as necessary, throughout the life of the contract.

Incorporate unusual or high-hazard activities not identified in the original APP as they are discovered.

3.4 Site Safety and Health Officer (SSHO)

The contractor shall have on site an employee designated as a Site Safety and Health Officer

(SSHO) who has completed the OSHA 30-hour Construction Safety training or its equivalent as specified in EM 385-1-1. The contractor shall complete the ENG Form 6282, Site Safety & Health Officer (SSHO) Designation Letter, and submit with the APP. The ENG Form 6282, Site Safety & Health Officer (SSHO) Designation Letter is included as enclosure 5. The SSHO or an equally qualified Designated Representative/alternate shall be always at the work site to implement and administer the Contractor's safety program and government-accepted Accident Prevention Plan.

3.5 Competent Persons

A Competent Person shall be provided for all the hazards identified in the Contractor's Safety and Health Program in accordance with the accepted Accident Prevention Plan and shall be always on-site when the work that presents the hazards associated with their professional expertise is being performed. Provide the credentials of the Competent Persons(s) to the Contracting Officer for acceptance in consultation with the Safety Office.

3.6 Activity Hazard Analysis (AHA)

The Contractor shall prepare and use an AHA as one of many tools to ensure safe performance of work. It is the Contractor's responsibility to prepare the AHA. The AHA shall be approved by the contracting officer and/or on-site government representative prior to commencement of work. All on-site employees shall review the approved AHA prior to performing work at the site and the AHA must be during weekly and “Tool Box” safety meetings as appropriate.

AHAs shall define the activities being performed and identify the work sequences, the specific anticipated hazards, site conditions, equipment, materials, and the control measures to be implemented to eliminate or reduce each hazard to an acceptable level of risk.

Work shall not begin until the AHA for the work activity has been accepted by the contracting officer and discussed with all engaged in the activity, including the Contractor, subcontractor(s), and government on-site representatives at preparatory and initial control phase meetings.

The names of the Competent/Qualified Person(s) required for a particular activity (for example, scaffolding, fall protection, other activities as specified by OSHA and this manual) shall be identified and included in the AHA. Proof of their competency/qualification shall be submitted to the contracting officer for acceptance prior to the start of that work activity. The AHA shall be reviewed and modified as necessary to address changing site conditions, operations, or change of competent/qualified person(s). The ENG Form 6206, Activity Hazard Analysis (AHA) is included as enclosure 4. While not mandatory for use, the ENG Form 6206 is the recommended format.

3.7 Safety meetings

Safety meetings shall be conducted in accordance with EM 385-1-1 and will generally include a review of past activities, plan for new or changed operations, review pertinent aspects of appropriate AHA (by trade), establish safe working procedures for anticipated hazards, and provide pertinent safety and health training and motivation. Meetings shall be conducted at least once a month for all supervisors on the project location and at least once a week for all workers by supervisors or foremen.

3.8 On-site Public Safety.

Work on this contract is immediately adjacent to public recreation facilities. Safety precautions to warn and limit public access shall be addressed both the APP and AHA.

3.9 Safety Submittals

The contractor shall submit the following for approval prior to the pre-construction meeting.

The following must be approved by the contracting officer prior to the commencement of work.

1. Accident Prevention Plan (APP) to include any related safety plans identified in the APP.

2. SSHO designation letter.

3. SSHO, Qualified Person (QP), and Competent Person (CP) qualifications/credentials.

4. Activity Hazard Analysis (AHA) for each of the definable work steps.

4.0 Regulatory Requirements

In addition to the detailed requirements included in the provisions of this contract, comply with the most recent edition of USACE EM 385-1-1, and all applicable federal, state, and local laws, ordinances, criteria, rules and regulations. Submit matters of interpretation of standards to the appropriate administrative agency for resolution before starting work. Where the requirements of this specification, applicable laws, criteria, ordinances, regulations, and referenced documents vary, the most stringent requirements govern.

5.0 Damage Reports

All instances where Government materials, supplies, property, and/or equipment are damaged shall be reported immediately to the contracting officer. When the damage is caused by contract employees, a written report of the incident and extent of such damage shall be submitted within 2 working days (less weekends and holidays) of occurrence. For property damage accidents of $2,000 or more, the Contractor will complete and submit ENG Form 3394.

6.0 Deficiencies

If the contractor fails to perform, or if performance in any area is judged unsatisfactory, the government will take corrective action. If any of the work does not conform to contract requirements, the government may require the contractor to perform the services again in conformity with contract requirements, at no cost to the government. When the defect in services cannot be corrected by re-performance, or cannot be corrected in the specified time frame, the contractor is required to respond to a Contract Discrepancy Report and deductions will be determined in accordance with Contract Clause entitled "Terms and Conditions- Simplified Acquisitions (Other than Commercial Items), paragraph (d)."

6.0 Contract Employees Conduct and Competency

All contract employees shall always conduct themselves in a proper manner. Most of the work will be performed in the presence of the general public; therefore, the conduct of all employees is critical and will be closely monitored. Use of controlled substances or consumption of beer or alcoholic beverages by contract employees is strictly prohibited. The contractor may be required to immediately remove from the work site any employee of the contractor who is incompetent or who endangers persons or property or whose physical or mental condition is such that it would impair the employee's ability to satisfactorily perform the work.

7.0 Working Hours

Normal working hours are Monday through Friday, 8:00 am to 5:00 pm. Requests to work outside of these hours shall be approved by the contracting officer or their representative.

8.0 Contractor Invoice

All invoices shall be submitted by email to Lockmaster Tim Tabery, Timothy.D.Tabery@usace.army.mil or by mail to:

Lock and Dam No. 3

Attn: Tim Tabery

4330 Lock and Dam Road mailto:Timothy.D.Tabery@usace.army.mil

Welch, MN 55089

A copy of all invoices shall be sent by email to Jarrod.S.Brown@usace.army.mil or by mail to:

Fountain City Service Base Attn: Jarrod Brown PO Box 397 431 North Shore Drive Fountain City, WI. 54629-0397 mailto:Jarrod.S.Brown@usace.army.mil

Enclosure 2. Lock and Dam 3 Comfort Station