Technical Specifications.pdf

W911WN-10-B-0006

Back Channel Dam, Left Abutment Stabilization and Scour Protection Emsworth Locks and Dams Ohio River Allegheny County, Pennsylvania

Technical Specifications January 2010

Emsworth L/D - Back Channel Left Abutment Stabilization and Scour Protection

PROJECT TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

01 11 00 GENERAL REQUIREMENTS

01 14 19.10 CSX TRANSPORTATION RAILROAD REQUIREMENTS

01 18 00 UTILITY COORDINATIONS

01 22 00.00 10 MEASUREMENT AND PAYMENT

01 32 01.00 10 PROJECT SCHEDULE

01 32 23 SURVEY AND ALIGNMENT CONTROL

01 32 33 DIGITAL PROGRESS IMAGES

01 33 00 SUBMITTAL PROCEDURES

01 35 26 GOVERNMENTAL SAFETY REQUIREMENTS

01 35 45.00 10 CHEMICAL DATA QUALITY CONTROL

01 42 00 SOURCES FOR REFERENCE PUBLICATIONS

01 45 01.10 USACE QUALITY CONTROL SYSTEM (QCS)

01 45 01 USACE QUALITY CONTROL

01 50 10 PROJECT AND SAFETY SIGNS

01 57 20.00 10 ENVIRONMENTAL PROTECTION

01 57 23 STORM WATER POLLUTION PREVENTION MEASURES

01 78 02.00 15 CLOSEOUT SUBMITTALS

DIVISION 02 - EXISTING CONDITIONS

02 41 00 DEMOLITION

02 42 00 DISPOSAL OF MATERIALS

02 61 13 EXCAVATION AND HANDLING OF CONTAMINATED MATERIAL

DIVISION 03 - CONCRETE

03 11 14.00 10 FORMWORK FOR CONCRETE

03 15 14.00 10 MONOLITH, CONTROL, AND CONSTRUCTION JOINTS

03 20 02 STEEL BARS, WELDED WIRE FABRIC, AND ACCESSORIES FOR

CONCRETE REINFORCEMENT

03 31 01.00 10 CONCRETE AND OTHER CONCRETE SECTIONS

03 37 26 CONCRETE FOR SOCKETED PIPE PILES

DIVISION 05 - METALS

05 50 14 STRUCTURAL METAL FABRICATIONS

05 50 15 CIVIL WORKS FABRICATIONS

DIVISION 13 - SPECIAL CONSTRUCTION

13 50 00 INSTRUMENTATION

DIVISION 31 - EARTHWORK

31 00 00 EARTHWORK

31 05 19.19 GEOGRID REINFORCEMENT

31 05 22 GEOTEXTILES USED AS FILTERS

31 62 16.13 METAL SHEET PILING AND WALL TERMINATION COLUMNS

31 62 23.13 SOCKETED PIPE PILES

31 63 33 MICROPILES

31 68 13 PERMANENT INCLINED ROCK ANCHORS

DIVISION 32 - EXTERIOR IMPROVEMENTS

32 11 23 AGGREGATE BASE COURSE

PROJECT TABLE OF CONTENTS Page 1

DIVISION 35 - WATERWAY AND MARINE CONSTRUCTION

35 20 23 DREDGING

35 31 19.15 GEORGETOWN AND PHILLIS ISLAND BANK PROTECTION AND DREDGE

MATERIALS DISPOSAL

35 31 19 STONE SLOPE AND SCOUR PROTECTION

35 43 29.15 GROUT BAG DEMONSTRATION PROJECT

-- End of Project Table of Contents --

PROJECT TABLE OF CONTENTS Page 2

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 11 00

GENERAL REQUIREMENTS

PART 1 GENERAL

1.1 SUMMARY

1.2 REFERENCES

1.3 SUBMITTALS

1.4 DRAWINGS

1.4.1 Contract Drawings - General

1.4.2 Reference Drawings

1.5 WORK AREAS AND RESTRICTIONS

1.5.1 General

1.5.2 Work Areas

1.5.3 Work Area Restrictions - Back Channel Dam, Left Abutment

1.5.3.1 CSX Transportation Railroad Restrictions

1.5.3.2 Surcharge Restrictions on Existing Abutment Wall

1.5.4 Work Area Restrictions - Back Channel Dam, Scour Protection

1.5.4.1 Back Channel Dam Apron and Gate Sill Restrictions

1.5.4.2 Surcharge Restrictions on Existing Right Abutment Wall

1.5.5 Access to Project Site

1.5.5.1 Back Channel Access

1.5.6 Existing Roads and Property

1.5.6.1 General

1.5.6.2 Hauling Permits

1.5.7 Laydown, Storage, and Parking Areas

1.5.8 Utilities

1.6 EXISTING SURVEY CONTROLS

1.6.1 Project Alignment

1.7 CONTRACTOR'S FLOATING PLANT

1.7.1 General

1.7.2 Equipment Requirements

1.7.3 Signal Lights and Markers

1.7.4 Maintenance of Floating Plant

1.7.5 Mooring of Floating Plant

1.7.6 Suspension of River Traffic and Construction

1.7.6.1 Withdrawal of Equipment and Floating Plant

1.7.6.2 Plan of Action, Withdrawal of Equipment and Floating Plant

1.7.6.3 Compensation and Extension of Contract Period, Suspension of Work

1.7.7 Operation of Small Water Craft

1.8 RESTRICTIONS TO RIVER TRAFFIC FOR CONSTRUCTION

1.9 PROTECTION AND MAINTENANCE OF ROAD TRAFFIC

1.10 DAMAGE TO WORK

1.11 PROTECTION OF UTILITIES

1.12 COORDINATION AND MANAGEMENT OF BULKHEADS AND LIFT GATES

1.12.1 Bulkheads and Gate Operation for Scour Protection

1.12.1.1 Operation of Dam Gates During Scour Protection Work

1.12.1.2 Dam Apron Bulkheads

1.13 OPERATION OF GOVERNMENT FACILITY

1.13.1 Emsworth Locks and Dams, Hours of Operation

SECTION 01 11 00 Page 1

1.13.2 Contractor's Work Hours

1.13.3 Coordination with Dam Operations

1.13.4 Government Service Crane and Bulkhead Hoist

1.13.5 Contractor Coordination and Scheduling

1.14 OTHER ACTIVE CONTRACT WORK

1.14.1 Main Channel Dam Rehabilitation

1.14.2 Back Channel Service Bridge Repairs

1.14.3 Back Channel Dam Right Abutment Stabilization

1.15 SAFETY AND HEALTH REQUIREMENTS

1.16 POOL LEVELS

1.17 INSPECTIONS AND ACCEPTANCE OF WORK

1.17.1 General

1.17.2 Access to Work

PART 2 PRODUCTS

2.1 PRODUCTS AND PARTS OF STANDARD MANUFACTURE

PART 3 EXECUTION

3.1 SEQUENCE AND CONDITIONS OF WORK

3.1.1 Sequence of Work

3.2 RECORDS AND REPORTS

-- End of Section Table of Contents --

SECTION 01 11 00 Page 2

SECTION 01 11 00

GENERAL REQUIREMENTS

PART 1 GENERAL

1.1 SUMMARY

This section addresses the general requirements applicable to the performance of the work under this contract. These requirements are in addition to those specified in other sections of the contract.

1.2 REFERENCES

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

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

33 CFR 81 72 COLREGS: Implementing Rules

33 CFR 84 Annex I: Positioning and Technical Details of Lights and Shapes

33 CFR 89 Inland Navigation Rules: Implementing Rules

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 385-1-1 (2008) Safety and Health Requirements Manual

EM 1110-2-1902 (2003) Slope Stability

EM 1110-2-2104 (2003) Strength Design for Reinforced - Concrete Hydraulic Structures

EM 1110-2-2105 (1994; Change 1) Design of Hydraulic Steel Structures

EM 1110-2-2502 (1989) Retaining and Flood Walls

EM 1110-2-2503 (1989) Design of Sheet Pile Cellular Structures Cofferdams & Retaining Structures

EM 1110-2-2504 (1994) Design of Sheet Pile Walls

1.3 SUBMITTALS

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

submittals not having an "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. The following shall be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

SECTION 01 11 00 Page 3

Propelling Unit Agreement; G|RE

The written agreement between the Contractor and the lessor documenting the requirement for required towboat or propelling unit to be onsite within the specified time limit shall be provided to the Contracting Officer prior to mobilization of any floating plant to the worksite.

Access Plan; G|RE

The Contractor shall submit an access plan for Government lock operating personnel and inspectors to the Contracting Officer.

Temporary Mooring Facilities; G|RE

The Contractor shall submit any proposed plans for development of temporary moorings to the Contracting Officer. Moorings shall be designed in accordance with the requirements herein.

Plan of Action, Withdrawal of Equipment and Floating Plant; G|RE

The Contractor shall prepare and submit a Plan of Action for withdrawal of equipment and floating plant in accordance with paragraph "Plan of Action, Withdrawal of Equipment and Floating Plant".

Small Water Craft Operations Plan; G|RE

The Contractor shall develop and submit a plan for operation of small water craft within the area of the dam.

SD-05 Design Data

Surcharge Restrictions; G|EC

Calculations, analyses, or other data required to verify that actual loads applied to the existing structures do not exceed the specified limits shall be submitted for approval.

1.4 DRAWINGS

1.4.1 Contract Drawings - General

The contract drawings provided reflect the work to be performed under this contract. The Contractor shall check all drawings immediately upon receipt, and verify the figures, dimensions, and representation of the work. The Contractor shall compare all drawings and verify the figures before laying out the work. Dimensions marked on drawings shall, in general, be followed. Use of scaled measurements shall not be allowed.

The Contractor shall promptly notify the Contracting Officer of any discrepancies, and shall be responsible for any errors which might have been avoided by complying with this paragraph. Any omissions from the contract drawings, specifications, or incorrect description of details of the work which are manifestly necessary to carry out the intent of the contract drawings and specifications, or which are customarily performed, shall not relieve the Contractor from performing such omitted or incorrectly described details of work, but shall be performed as if fully and correctly set forth and described in the contract drawings and

SECTION 01 11 00 Page 4 specifications. Unless otherwise noted, dimensions and elevations, and other features shown on contract drawings are generally based on site surveys and measurements. The Government cannot guarantee the accuracy of the dimensions, elevations, and features shown on the contract drawings which are based on the reference drawings, and it shall be the responsibility of the Contractor to verify all elevations and the dimensions shown by measurements in the field, at no additional cost to the Government.

1.4.2 Reference Drawings

The reference drawings included with the folio of contract drawings show existing conditions to the best knowledge of the Government. Unless otherwise noted, dimensions, elevations, and other features shown on contract drawings, are generally based on the reference drawings supplemented by field surveys. The Government cannot guarantee the accuracy of the dimensions, elevations, and features shown on the reference drawings or on the contract drawings which are based on the reference drawings, and it shall be the responsibility of the Contractor, whenever necessary, to verify all elevations and the dimensions shown by measurements in the field. All elevations are referenced to the local datum used for the original construction of the locks and dams. The Contractor shall verify elevations and dimensions before laying out the work. The Contracting Officer shall be notified of any discrepancies prior to commencing work.

1.5 WORK AREAS AND RESTRICTIONS

1.5.1 General

The work under this contract shall be performed at Emsworth Locks and Dams, Ohio River, Allegheny County, Pennsylvania. The Ohio River at the project is divided by Neville Island into two channels, a larger main channel and a smaller back channel. The Emsworth facility consists of two dams, one located on the main channel 6.2 river miles downstream of the Point in Pittsburgh, and another located on the back channel 6.8 river miles downstream of the point in Pittsburgh. A pair of lock chambers are located at the right bank of the main channel. Access to the locks is from a public parking area located on the right bank of the main channel. Access to the right abutment of the Back Channel Dam is from access roads located on Neville Island. The work areas, including the work platform, on the left abutment may be accessed from the river only. The work areas are shown on Contract Drawings C-1031 and S-1139.

1.5.2 Work Areas

The work area under this contract will be at the Back Channel Dam left abutment and downstream of the Back Channel Dam. As required by Contract Clause "OPERATIONS AND STORAGE AREAS", all operations of the Contractor shall be confined to areas shown on the drawings required to accomplish the work under this contract, and as authorized and approved by the Contracting Officer. The limits of the Contractor's work areas are as shown on the Contract Drawings and are specified in paragraph "Access to Project Site".

All work areas shall be coordinated with the Contracting Officer prior to commencement of work.

SECTION 01 11 00 Page 5

1.5.3 Work Area Restrictions - Back Channel Dam, Left Abutment

1.5.3.1 CSX Transportation Railroad Restrictions

Work area restrictions related to the CSX Transportation railroad adjacent to the Left Abutment shall be in accordance with Section 01 14 19.10 CSX TRANSPORTATION RAILROAD REQUIREMENTS and Contract Drawing S-1139. Access to the Left Abutment shall be only permitted from the river. The CSXT right-of-way may not be used for access, and no temporary at-grade crossing will be permitted.

1.5.3.2 Surcharge Restrictions on Existing Abutment Wall

The Contractor shall be restricted to a maximum of a uniform 500 pounds per square foot surcharge load on the existing abutment wall. This surcharge load shall include all construction loading, including labor, materials, equipment, and supplies, that will be imposed on the wall from construction of the work platform, micropiles, and grouted riprap slope protection.

Detailed work plans shall be submitted per the requirements of these contract specifications that shall indicate the means, methods, and procedures of work with drawings. All work plans shall be accomplished in a manner which will prevent damage to the existing concrete and supporting piling and ensure the complete safety of the existing abutment wall. The work plans shall be verified by detailed calculations that reflect all actual loads applied to the existing structures that include, but are not limited to, impact factor(s), self-weight of all equipment and materials, soil pressures, etc. Loads, criteria, and standards used in the development of all plans, as a minimum, shall be in accordance with nationally recognized codes (ACI, AISC, etc.). Calculations shall be signed and sealed by a Registered Professional Engineer(s) licensed within the United States.

1.5.4 Work Area Restrictions - Back Channel Dam, Scour Protection

1.5.4.1 Back Channel Dam Apron and Gate Sill Restrictions

The Contractor may use the back channel dam apron and sill for work means and methods of equipment and material removal and installation in accordance with the restrictions imposed herein. Detailed work plans shall be submitted per the requirements of these contract specifications that shall indicate all detailed means, methods, and procedures of work with drawings. All work plans shall be accomplished in a manner which will prevent damage to the existing concrete and supporting piling and ensure the complete safety of the existing apron and sill structures. The work plans shall be verified by detailed calculations that reflect all actual loads applied to the existing structures that include, but are not limited to, impact factor(s) and equipment weight. Calculations shall be signed and sealed by a Registered Professional Engineer(s) licensed within the United States.

The maximum allowable increased vertical pile capacity on existing apron and sill structures shall be as follows:

Existing Apron: 3.4 kip/timber pile on all piles.

Existing Dam

Gate Sill: 19.0 kip/steel H-pile for pile row Nos. 1 & 2.

19.0 kip/steel H-pile for pile row Nos. 3, 4 & 5.

See Sketch #1 attached at the end of this section for location of all

SECTION 01 11 00 Page 6 piling. This sketch contains relevant information to the spacing of piles and other information that may help in the evaluation of the existing apron and gate sill and shows existing conditions to the best knowledge of the Government.

The limit states that shall be used for the existing apron and gate sill calculations shall be as follows:

Concrete:

Compressive strength f'c of the concrete is equal to 2,500 psi for the apron and 3,000 psi for the gate sill and piers.

Analysis:

The concrete analysis of the existing apron shall assume plain unreinforced concrete and not relied upon by bending.

1.5.4.2 Surcharge Restrictions on Existing Right Abutment Wall

The Contractor shall be restricted to a maximum 500 pounds per square foot surcharge load on the existing abutment wall. This surcharge load shall include all labor, materials, equipment and supplies that will be imposed on the wall from shared use of the Government-provided contractor laydown areas. Detailed work plans shall be submitted per the requirements of these contract specifications that shall indicate the means, methods, and procedures of work with drawings. All work plans shall be accomplished in a manner which will prevent damage to the existing concrete and supporting piling and ensure the complete safety of the existing abutment wall. The work plans shall be verified by detailed calculations that reflect all actual loads applied to the existing structures that include, but are not limited to, impact factor(s), self-weight of all equipment and materials, soil pressures, etc. Loads, criteria, and standards used in the development of all plans, as a minimum, shall be in accordance with nationally recognized codes (ACI, AISC, etc.). Calculations shall be signed and sealed by a Registered Professional Engineer(s) licensed within the United States.

1.5.5 Access to Project Site

1.5.5.1 Back Channel Access

Back channel access is limited from both the water and land.

The Contractor shall perform all land based work under this contract downstream of the existing dam on the left abutment within the limits of the Temporary Work Area Easement, Permanent Channel Improvement Easement, and the Permanent Subsurface Anchor Easement. No work shall be performed within the Exclusion Zone of the railroad right-of-way without permission of CSXT and the Contracting Officer. The Contractor may use the permitted areas to stage equipment and materials for the work, subject to limitations and coordination requirements specified within this section and other sections, as well as access to the left abutment for installation of the work platform and grouted riprap slope protection. The Contractor may also further develop the riverbank within this area for access from the river.

Any proposed development of the river bank for the purpose of access shall be submitted to the Government for review and approval. Any proposed access will not block or in any other way obstruct flow through the dam gates. The development of plans for any proposed access shall be prepared under the direction of, or by a Registered Professional Engineer. Any required investigations (i.e. soil and rock mechanics, rock depth, etc.)

SECTION 01 11 00 Page 7 shall be the responsibility of the Contractor, and all costs for such investigation shall be borne by the Contractor.

The Contractor shall perform all river based work under this contract from floating barges within the Ohio River Back Channel, and shall be within the limits of the Government's navigational servitude up to the Ordinary High Water Level (OHWL) contour 703.8 and for a distance of 500 feet upstream and downstream of the axis of the back channel dam. Upstream access to the Back Channel Dam from the river is restricted by two low-clearance bridges located upstream of the dam. The Fleming Park Highway Bridge and the CSXT Railroad bridge have shallow clearance between low steel and normal operating pool (El. 710). The Contractor shall investigate these bridges in order to plan and design the delivery of equipment and materials to the dam site from upstream. Special low clearance floating plant and propelling units will likely be required for work from upstream of the dam. No downstream access restrictions are present.

If fill material (e.g., riprap backfill, stone dike material, etc.) is placed below the Ordinary High Water Level (OHWL) shown on the drawings, the fill activities must comply with the provisions of authorized Nationwide Permits (e.g., NWP 13 - Bank Stabilization or NWP 33 - Temporary Construction, Access and Dewatering) designated in Special Public Notice No. 07-26, dated September 11, 2007, and with the applicable conditions of Pennsylvania General Permit #3 (GP-3). Submit an application for GP-3 through the Resident Engineer for registration with the PaDEP. In accordance with Contract Clause "PERMITS AND RESPONSIBILITIES", the Contractor shall be responsible to secure all necessary Federal, State, and local permits for riprap backfill installation.

The Contractor is responsible to design temporary structures that comply with the conditions of the NWPs. If fill below OHWL is proposed, the Contractor must comply with the terms of a PaDEP GP-8 (http://www.dep.

state.pa.us/dep/efacts/GeneralPermitsListing.htm). The GP-8 application will be submitted to the Resident Engineer, which will in turn be submitted to the Regulatory Branch and forwarded to the PaDEP for registration. If excavation above OHWL is proposed, the Contractor will prepare and maintain onsite, an erosion and sediment control plan in compliance with applicable state and local requirements. In accordance with Contract Clause "PERMITS AND RESPONSIBILITIES", the Contractor shall be responsible to secure all necessary permits required by Federal, State, and local laws for any development above OHWL.

1.5.6 Existing Roads and Property

1.5.6.1 General

The Contractor's traffic on roads selected for hauling material to and from the site shall interfere as little as possible with public traffic. The Contractor shall investigate the adequacy of existing roads and the allowable load limit on these roads. The Contractor shall be responsible for all damage to existing roads and property occasioned by any of his operations. When intending to transport any heavy loads on roadways, the Contractor shall investigate all weight limits for the roads he intends to use and shall secure any required bond(s) from the respective owner(s).

The Contractor shall document the existing condition of the roadways that he will be using, with the owners thereof. In the past, video recordings of the original roadway conditions have provided satisfactory documentation. Prior to beginning any construction, the Contractor shall videotape, on DVD format, all existing structures including, but not

SECTION 01 11 00 Page 8 limited to, local roads, public property, and any other areas as directed by the Contracting Officer. The owners of such roadways and other property should be present at the time of the documentation. An unedited copy of all video recordings shall be given to the owners and the Contracting Officer within 5 days after documentation. All damage to transportation facilities, public property, or utilities caused by the Contractor's operations shall be repaired to the satisfaction of the Contracting Officer at no additional cost to the Government. Any damage to the roadways, caused by the Contractor's operations, shall be repaired in kind by the Contractor and at his own expense. Roads shall be kept clear of all debris generated by the Contractor's operations. Roads shall be cleaned of any spillage. Upon completion of all work requiring use of the local roads, the roadways shall be restored to their preconstruction condition by cleaning and/or reconstruction of damaged drainage facilities, base courses, and pavements as necessary. Repairs shall be made in the same manner as the original construction. No separate payment will be made for maintaining and restoring the condition of the roads, and all costs in connection therewith shall be considered as incidental to performance of the work.

1.5.6.2 Hauling Permits

The Contractor shall be responsible for acquiring all necessary oversized hauling permits and general hauling permits for any equipment or debris transported via roadways, as required. No heavy hauling on public roads will be permitted until all permits and bonds have been obtained as required. All costs associated with securing these permits shall be borne by the Contractor.

1.5.7 Laydown, Storage, and Parking Areas

Laydown and storage areas shall be confined to the Temporary Work Area Easement, Permanent Channel Improvement Easement, any floating barges utilized by the Contractor for performance of work under this contract as shown on the drawings, or any locations adjacent to the right abutment with prior approval of the Contracting Officer. Parking is limited at the project site and Contractor parking may not be available on Government property. The Contractor shall be responsible for obtaining all required parking areas off Government property. The Contractor shall arrange for transportation of employees from the parking area(s) to the points of access at the project site.

1.5.8 Utilities

The Contractor shall be responsible for coordination of all existing utilities with the work and for providing utilities for construction purposes. Utilities shall be coordinated in accordance with Section

01 18 00 UTILITY COORDINATIONS.

1.6 EXISTING SURVEY CONTROLS

Corps of Engineer survey controls are located on the Back Channel Dam. The Contractor will be given this information upon request.

1.6.1 Project Alignment

All new work to be constructed under this contract shall be constructed level, plumb, and accurately from survey control points established by the Contractor as necessary to construct all work within the proper alignment.

SECTION 01 11 00 Page 9

The Contractor shall verify the elevations and positions of the Corps of Engineers survey controls before using them to layout the work under this contract, and shall notify the Contracting Officer of any discrepancies prior to commencing work. If any existing survey controls are disturbed during execution of the work, the Contractor shall replace the survey control as directed by the Contracting Officer at no expense to the Government.

1.7 CONTRACTOR'S FLOATING PLANT

1.7.1 General

Floating plant, and the operation of such plant, shall comply with the requirements of EM 385-1-1, Section 19. Floating plant which is not being used in the performance of the work shall be secured in a manner that does not interfere with navigation on the river. Emergency plans for removing or securing floating plant and evacuating personnel in the event of severe weather shall be prepared in accordance with EM 385-1-1, Section 19.A.03.

The Contractor shall provide personnel as necessary to adjust moorings to provide for fluctuations of pool level. A propelling unit capable of moving the floating plant must be available at all times. If the Contractor chooses to have a leased towboat or propelling unit offsite, the plant must be capable of being onsite within 4-hours notice. The written propelling unit agreement between the Contractor and the lessor documenting this requirement shall be provided to the Contracting Officer prior to mobilization of any floating plant. The agreement shall also include documentation that the propelling unit operator currently possesses a U.S. Coast Guard "Operator of Uninspected Towing Vessels" license. The Contractor shall be fully responsible for selection of floating plant which is suitable for the performance of the work under this contract.

Contractor's floating plant shall operate only within the areas of work shown on the drawings, unless such areas are modified with the approval of the Contracting Officer and Lockmaster.

1.7.2 Equipment Requirements

The Contractor shall select floating plant and towboats and propelling units of a size and capacity suitable for performance of the work under this contract. Towboats and propelling units shall have sufficient horsepower capacity to control the floating plant used, considering the size and draft of the plant, for the expected river velocities and wind conditions. The Contractor shall submit a plan of all floating plant, floating plant based equipment (i.e. cranes, derricks), temporary operating systems (i.e. generators, compressors, welding machines, etc.), and other appurtenant features which he will have present during the contract period. The Contractor shall use sketches, diagrams, and narratives to indicate location of all floating plant equipment. The Contractor shall use manufacturer catalog information or other suitable data to describe the specific equipment to be used. The Contractor shall also indicate the methods and procedures that will be used to deliver materials, supplies and equipment via floating plant.

1.7.3 Signal Lights and Markers

The Contractor shall display signal lights and conduct his operations in accordance with the General Regulations of the Coast Guard, as set forth in Commandant, U.S. Coast Guard Instruction M16672.2, or 33 CFR 81, Appendix A (International), and 33 CFR 84 through 33 CFR 89 (inland) as applicable.

The Contractor shall be required to furnish and install all buoys, lights, SECTION 01 11 00 Page 10 signs, and other safety devices as required by Coast Guard rules and regulations. All equipment and devices shall be Coast Guard approved.

1.7.4 Maintenance of Floating Plant

The Contractor shall maintain all floating plant equipment in good working condition throughout the contract period.

1.7.5 Mooring of Floating Plant

The Contractor shall be responsible for all mooring of floating plant.

When not in use, the Contractor's floating plant shall be securely moored.

The Contractor shall also be solely responsible for providing personnel in order to adjust mooring lines as required by the prevailing river conditions.

In addition to the use of spuds for securing floating plant, the Contractor may construct temporary mooring facilities such as dolphins, pile clusters, and dead man anchorages within the back channel for mooring. Any such temporary mooring structures shall be placed no closer than 1,000 feet from the downstream face of the dam, and shall not adversely obstruct the flow.

Any temporary moorings constructed by the Contractor shall be completely removed at the completion of the project. Development of plans for any proposed mooring shall be prepared under the direction of, or directly by, a Registered Professional Engineer. Any required investigations (i.e. soil and rock mechanics, rock depth, etc.) shall be the responsibility of the Contractor, and all costs for such investigation shall be borne by the Contractor.

Design loads, "hydraulic" design factors, criteria, and standards used for development of temporary mooring structures, as a minimum, shall be in accordance with the following Corps of Engineers hydraulic structure design standards:

EM 1110-2-1902 Slope Stability, 31 Oct 03

EM 1110-2-2104 Strength Design for Reinforced - Concrete Hydraulic Structures, Change 1, 20 Aug 03

EM 1110-2-2105 Design of Hydraulic Steel Structures, Change 1, 31 May 94

EM 1110-2-2502 Retaining and Flood Walls, 29 Sep 89

EM 1110-2-2503 Design of Sheet Pile Cellular Structures Cofferdams & Retaining Structures, 29 Sep 89

EM 1110-2-2504 Design of Sheet Pile Walls, 31 Mar 94

A copy of these "Engineering Manuals" may be obtained at the following website: http://140.194.76.129/publications/.

Additional Corps of Engineers design standards may be applicable dependent on the nature of the mooring structure proposed.

Any proposed temporary mooring facilities developed below the Ordinary High Water Level (OHWL) shown on the drawings shall comply with the conditions

SECTION 01 11 00 Page 11 of the Corps of Engineers NWP 33 - Temporary Construction, Access and Dewatering, which is found in Public Notice No. 07-26, dated September 11, 2007 (http://www.lrp.usace.army.mil/or/or-f/07-26.pdf). Typical temporary mooring cells, dolphins, or H-piles placed below OHWL are within the scope of NWP 33. The Contractor is responsible to design temporary mooring facilities that comply with the conditions of the NWP.

Any temporary moorings constructed by the Contractor shall be completely removed at the completion of the project.

The Contractor will be permitted to moor floating plant to the downstream face of the dam when not in use, and if approved by the Contracting Officer. However, this plant must be completely removed and secured to temporary moorings by the time the upstream river gauge reaches 22.0, or within two hours notice from the Contracting Officer or Lockmaster.

1.7.6 Suspension of River Traffic and Construction

1.7.6.1 Withdrawal of Equipment and Floating Plant

Navigational restrictions require that all river traffic through Emsworth Locks and Dams be suspended when the river level reaches El. 716.0 (Upper gauge = 22 feet). Therefore, all work performed from floating plant at the project site shall be suspended when the river level is at this stage.

Work from areas not affected by this river stage may continue. The Contractor's floating plant, or any subcontractor's floating plant, shall be moored away from the dam by the time the river level reaches El. 716.0, and work is suspended. It shall also be the Contractor's responsibility to withdraw any land-based equipment that would be subject to damage by rising river stages at this level from such affected areas, before they are subject to damage. The Contractor shall monitor the prevailing river conditions at the project site, referring to the upstream project river gauge, river forecasts issued by the National Weather Services, and the Corps of Engineers River Forecast System, and shall determine when to withdraw equipment and floating plant. The withdrawal of equipment and floating plant shall ultimately be the Contractor's decision and will not be directed by the Government. It shall be the Contractor's responsibility to determine the time necessary to make a complete and safe withdrawal of equipment and floating plant with due consideration given to the location of mooring area; amount of equipment; size of the floating plant; and capacity of towboats and propelling units to operate safely and efficiently at the expected river velocities. All floating plant and equipment shall remain securely moored during the period when river levels are at or above El. 716.0, and river traffic and work is suspended. The Contractor shall also be responsible for providing personnel during the suspension to adjust mooring lines as required by the prevailing river conditions. The Contractor shall resume all work, and remobilize equipment and floating plant from its moored location when the river level reaches El. 716.0 with a falling condition forecasted.

1.7.6.2 Plan of Action, Withdrawal of Equipment and Floating Plant

The Contractor shall prepare and submit a Plan of Action for withdrawal of equipment and floating plant. The plan shall detail the procedures for withdrawal of equipment and floating plant in the event that suspension of river traffic and work is imminent. The Plan of Action shall include, but is not limited to, the following information:

a. Procedure(s) For Monitoring River Conditions Including River

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Levels, Discharges, And Velocities.

b. Mooring Location(s).

c. Monument River Condition Which Affect Notification Actions.

d. Monument River Conditions Which Affect Withdraw.

e. Sequence and Duration of Withdraw.

f. Procedures for Care of Moored Floating Plant and Equipment.

g. Monument River Conditions Affecting Remobilization.

h. Sequence and Duration of Remobilization.

The Plan of Action shall include a listing of key Contractor's Points of Contact and telephone numbers. The Plan of Action shall include the withdrawal of any subcontractor's equipment and floating plant. The Contractor's Plan of Action shall be consistent with the applicable requirements for Emergency Planning as described in EM 385-1-1. All key Contractor personnel, including superintendents, foremen, safety officers, and QC personnel, shall be given a copy of the Plan of Action and shall be thoroughly familiar with their duties under this plan. Subcontractors shall also be thoroughly familiar with their responsibilities and duties under the plan.

1.7.6.3 Compensation and Extension of Contract Period, Suspension of Work

The withdrawal of floating plant and equipment is considered a condition of work dictated by the nature of the worksite. The Contractor's withdrawal of equipment and floating plant shall not be construed as a direction on the part of the Government or Contracting Officer, under the provisions of Contract Clause "SUSPENSION OF WORK", which shall not apply to this work condition. No compensation will be made to the Contractor for withdrawal of this equipment nor will any delay costs be made for the period during which work cannot be accomplished. In accordance with Contract Clause "DEFAULT (FIXED PRICE CONSTRUCTION)", the contract period will be extended equitably for the withdrawal of floating plant and equipment.

1.7.7 Operation of Small Water Craft

The Contractor shall develop, prepare, and submit a small water craft operations plan addressing the operation of small water craft within the "Restricted Area" of the Emsworth Locks and Dams. The plan shall address safe operations of small water craft and shall include maximum river stages, maximum river flows, horsepower requirements, training, and any other items necessary to address all the hazards associated with navigating in the "Restricted Area" of the dams.

1.8 RESTRICTIONS TO RIVER TRAFFIC FOR CONSTRUCTION

The Contractor shall not interfere with river traffic through the lock chambers of the Main Channel or their approaches during performance of work under this contract. The Contractor will not be given any privileges for priority lockage under the conditions of this contract, unless specifically authorized by the Contracting Officer, for transportation of barges, water crafts, materials, personnel, or supplies from one side of the Back Channel Dam to the other by traveling around Neville Island through the Main Channel Locks.

1.9 PROTECTION AND MAINTENANCE OF ROAD TRAFFIC

During construction, the Contractor shall maintain and protect traffic on all affected roads during the construction period, except as otherwise specifically directed by the Contracting Officer. The traveling public

SECTION 01 11 00 Page 13 shall be protected from damage to person and property. The Contractor shall submit his proposed traffic control plan for approval.

1.10 DAMAGE TO WORK

The responsibility for damage to any part of the permanent work shall be as set forth in Contract Clause "PERMITS AND RESPONSIBILITIES". However, if, in the judgment of the Contracting Officer, any part of the permanent work performed by the Contractor is damaged by flood or earthquake, which damage is not due to the failure of the Contractor to take reasonable precautions or to exercise sound engineering and construction practices in the conduct of the work, the Contractor shall make the repairs as ordered by the Contracting Officer and full compensation for such repairs will be made at the applicable contract unit or lump sum prices as fixed and established in the contract. If, in the opinion of the Contracting Officer, there are no contract unit or lump sum prices applicable to any part of such work, an equitable adjustment pursuant to the Contract Clause "CHANGES", will be made as full compensation for the repairs of that part of the permanent work for which there are no applicable contract unit or lump sum prices.

Except as herein provided, damage to all work (including temporary construction), utilities, materials, equipment, and plant shall be repaired to the satisfaction of the Contracting Officer at the Contractor's expense, regardless of the cause of such damage.

1.11 PROTECTION OF UTILITIES

Utilities shall be protected as specified in Section 01 18 00 UTILITY

COORDINATIONS.

1.12 COORDINATION AND MANAGEMENT OF BULKHEADS AND LIFT GATES

Coordination and management of the existing aluminum bulkheads will not be required for the performance of work under this contract. The Contractor will not be permitted to use the bulkheads, and only the Government will use them in the case of an emergency. Since the gates at the Back Channel Dam are new, they are anticipated to be utilized for dam closures.

1.12.1 Bulkheads and Gate Operation for Scour Protection

1.12.1.1 Operation of Dam Gates During Scour Protection Work

All Back Channel Dam dam gates shall remain operable at all times during the contract period. The gate undergoing scour protection work and the two gates adjacent to it may be restricted, but may be opened by the Government when necessary. The Contractor shall coordinate these gate restrictions with the gate closures being performed at the Main Channel Dam for completion of the Main Channel Dam Rehabilitation construction and the restriction at the Back Channel Dam for Right Abutment Stabilization construction. The drawings present a sequencing/phasing schedule for grout bag scour protection construction and left abutment combination wall construction. This schedule reflects permissible gate closures and restrictions during the course of the work.

TYPICAL INTERIM SCHEDULE FOR MAJOR REHAB, TRIAL SCHEDULE OF SPILLWAY

GATE OPERATIONS FOR NORMAL OPERATION, provided at the end of this section shows typical gate operations for the Main and Back Channel Dam gates under various stage-discharge conditions.

TYPICAL INTERIM SCHEDULE FOR MAJOR REHAB, TRIAL SCHEDULE OF SPILLWAY

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GATE OPERATIONS FOR GATES 5&4 BULKHEADED, GATES 6&3 RESTRICTED, GATES

9,11,12&13 RESTRICTED provided at the end of this section shows the typical gate operations that will be followed during grout bag scour protection construction. The schedule reflects permissible gate restrictions during the course of the work. The schedule also considers other active work on the Main Channel Dam that is expected to be occurring at the same time that work under this contract is performed.

It is noted that the red/yellow bar scale shown in TYPICAL INTERIM SCHEDULE

FOR MAJOR REHAB, TRIAL SCHEDULE OF SPILLWAY GATE OPERATIONS FOR GATES 5&4

BULKHEADED, GATES 6&3 RESTRICTED, GATES 9,11,12&13 RESTRICTED is a "sliding scale". The colored bars must be moved left or right to position them correctly in line with the particular gate bay in which work is being performed. The scenario shown in reflects the construction of scour protection repair downstream of Gate 12. On the other hand, if construction apron and scour repair downstream of Gate 13 was being performed, the yellow bar would cover Gates 9 and Gates 12 thru 14.

The gate operations shown in attached Typical Interim Schedules are necessary in order to prevent an adverse increase in water levels at the Point in Pittsburgh, and excessive scour downstream of the dam. The Contractor nor Contracting Officer will have authority to modify gate operations as shown to accommodate active contract work. All gate operations shall be made by Government personnel.

1.12.1.2 Dam Apron Bulkheads

It is the Contractor's responsibility to collect, transport and install, as necessary, two sets of apron bulkheads from PEWARS. The Contractor shall provide a minimum of 30 days notice to the Contracting Officer from the dates when he intends to collect the existing bulkhead units from PEWARS.

These units are shown in the sketches and images provided with this contract package. The Contractor may utilize these existing bulkheads for limited cross flow within a gate bay or other work as he/she see necessary.

These bulkheads are installed parallel with flow and are recessed into the apron "baffle" as shown on Reference Dwg. O-LEM-40/39.2 and Miscellaneous Sketches BOS-1, 2, 3, and 4. Apron bulkhead units are approximately 24'-0" long by 7'-4" high, and weigh approximately 4,200 pounds each. The apron bulkheads will provide protection to an elevation of El. 696.0 +. This affords about 4 feet above the normal tailwater elevation (El. 692.0). The Contractor shall review the hydrographs provided when planning work. The Contractor may provide additional measures to increase the height and subsequent level of protection from tailwater inundation at his own expense. The Contractor shall submit plan for additional measure to the Contracting Officer for approval. The Contractor shall make all placements and movements of the apron bulkhead units throughout the period of work.

The Contractor shall be responsible for the control of all water during dewaterings and as a result of leakage past any bulkhead seals.

At the completion of all work on the Back Channel Dam, the Contractor shall return the apron bulkheads to PEWARS.

1.13 OPERATION OF GOVERNMENT FACILITY

The Emsworth Locks and Dams facility shall remain in operation at all times. The Contractor shall perform his work in a manner which will not interfere with the operation of the facilities and the duties of Government

SECTION 01 11 00 Page 15 personnel. Particular care shall be taken during all operations under this contract to prevent damage to any operating equipment or facilities at the project. The Contractor shall take all necessary precautions to ensure the safety of the workers in accordance with the applicable provisions of EM 385-1-1. Contractor operations shall be performed in such a manner to ensure that project personnel, navigation industry personnel, and the public are protected at all times.

1.13.1 Emsworth Locks and Dams, Hours of Operation

Emsworth Locks and Dams operates 24 hours per day.

1.13.2 Contractor's Work Hours

Contractor's work hours shall be restricted to 7:30 A.M. to 6:00 P.M., Monday through Friday, or as otherwise approved by the Contracting Officer.

The Contractor shall coordinate with the Contracting Officer to make sure Government personnel are present during major features of work.

1.13.3 Coordination with Dam Operations

The Contractor shall perform all work in a manner that will not interfere with the duties of the lock and dam personnel. Particular care shall be taken during all operations under this contract to prevent damage to any operating equipment or facilities at the project. The Contractor shall continuously maintain safe access to all areas of the Back Channel Dam for operating personnel, during every phase of the work, unless otherwise directed by the Contracting Officer.

1.13.4 Government Service Crane and Bulkhead Hoist

The Contractor will not be permitted to use the Government's service crane or bulkhead hoist for any purposes under this contract. The Contractor will provide all necessary cranes for lifting equipment, materials, and supplies.

1.13.5 Contractor Coordination and Scheduling

In accordance with Section 01 32 01.00 10 PROJECT SCHEDULE, the Contractor shall submit a project schedule for his work to the Contracting Officer.

All necessary adjustments in the Contractor's work schedule shall be coordinated and approved by the Contracting Officer.

1.14 OTHER ACTIVE CONTRACT WORK

Other active contract work may be underway at the Emsworth Locks and Dams during performance of the work under this contract as specified in the following subparagraphs. The Contractor shall be required to coordinate and provide access to the work areas at the Back Channel Dam to other Contractors and shall not interfere with construction performed under these contracts. The Contractor shall be aware of all other contract work being constructed at the Back Channel and Main Channel Dams during the construction period. The work under separate effort may continue through the completion of the work under this contract.

1.14.1 Main Channel Dam Rehabilitation

Efforts are underway at the Main Channel Dam for rehabilitation construction. This rehabilitation construction consists of the following

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Main Channel Dam work: site preparation work, including fence modifications; pier modifications, including concrete removal, concrete repairs, installation of embedded features, demolition of existing machinery houses, and construction of new machinery houses; lift gate modifications, including demolition of existing lift gates, installation of new lift gates, and installation of new lift gate operating machinery;

miscellaneous electrical modifications, including power, lighting, and HVAC systems, control and instrumentation systems, and new Main Channel Dam electrical service; existing abutment wall modifications, including concrete removal, concrete repairs, construction of a new esplanade concrete slab, and the installation of rock anchors for stability; dredging operations downstream of the dam apron, including removal of existing obstructions, and staging and reinstallation of derrick stone and graded stone; grout bag scour protection downstream of the Main Channel Dam, including grout bag installation, apron tie-in element installation, bedding material and geogrid reinforcement installation on the prepared river bottom, and grout bag flank protection during various stages of construction; existing left abutment wall modifications, including the installation of an abutment combination wall consisting of the installation of pipe piles, sheet piles, and end piles, drilling of rock sockets, placement of concrete in and around the pipe piles, and installation of riprap backfill on the landward side of the constructed combination wall;

installation a pre-engineered metal control building with foundation; and installation of a main channel emergency generator set and access platform.

This main channel rehabilitation construction consists of the following Back Channel Dam work: installation of access platform around the existing Back Channel Dam emergency generator; and installation of new bellow covers on the machinery houses.

Gate closures at the Back Channel Dam will need to be coordinated with the Main Channel Dam Contractor and the Government. Work under the Main Channel Dam rehabilitation will restrict permissible gate operations and closure timings and durations during performance of the work.

1.14.2 Back Channel Service Bridge Repairs

Efforts are expected to begin at the Back Channel Dams for service bridge repairs before the start of construction of the Back Channel Dam scour protection and left abutment stabilization project. These service bridge repairs consist the following work at Back Channel Dam: replacement of the service bridge bearings, including removal of existing bearings and installation of new bridge bearings; replacement of walkways, including removal of existing service bridge walkway platforms and the installation of new walkways to permit wider access on the service bridge; electrical modifications, including removal and reinstallation of the service bridge crane electrical railing; replacement of the service bridge crane rails, including removal of existing rails and installation of new rails;

miscellaneous concrete…