WSR_RSR_VOL 2 Specifications final.pdf

CLAYTON COUNTY WATER AUTHORITY

WALT STEPHENS AND ROCK CUT ROAD CULVERT

REHABILITATION PROJECT

TASK NUMBER RT-SW-22-08

BID NUMBER 2024-SW-28

ENGINEER

RIVER TO TAP

PREPARED FOR

CLAYTON COUNTY WATER AUTHORITY

CLAYTON COUNTY, GEORGIA

AUGUST 2024

PROJECT IS FUNDED BY GEFA

VOLUME 2 OF 3

TECHNICAL SPECIFICATIONS

100% SUBMITTAL DOCUMENTS

WALT STEPHENS & ROCK CUT ROAD 00010-1 TABLE OF CONTENTS

CULVERT REHABILITATION PROJECT AUGUST 2024

RT-SW-22-08

Walt Stephens and Rock Cut Road Culvert Rehabilitation Project

Volume 2 � Technical Specifications

Table of Contents

Section Title

02000 SITE WORK

02050 DEMOLITION

02110 CLEARING AND GRUBBING

02125 TEMPORARY AND PERMANENT EROSION AND SEDIMENTATION

CONTROL

02140 DEWATERING

02150 SHEETING, SHORING, AND BRACING

02200 EXCAVATION AND BACKFILL

02371 WIRE MESH GABIONS

02700 REMOVING AND REPLACING PAVEMENT

02900 TREES, PLANTS, AND GROUND COVERS

02920 SITE RESTORATION

02933 SEEDING AND SODDING

03100 CONCRETE FORMWORK

03150 CONCRETE JOINTS & ACCESSORIES

03200 CONCRETE REINFORCING

03300 CAST-IN-PLACE CONCRETE

05095 POST-INSTALLED ANCHORS

WALT STEPHENS & ROCK CUT ROAD 02000-1 SITE WORK

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SECTION 02000

SITE WORK

PART 1 � GENERAL

1.01 DESCRIPTION

These general site work requirements apply to all site work operations. Refer to specification sections for specific product and execution requirements.

1.02 Quality assurance

A. Comply with all applicable local, state, and federal requirements regarding materials, methods of work, and disposal of excess and waste materials.

B. Obtain and pay for all required inspections, permits, and fees. Provide notices required by governmental authorities.

1.03 Project conditions

A. Locate and identify existing underground and overhead services and utilities within contract limit work areas. Provide adequate means of protection of utilities and services designated to remain. Repair utilities damaged during site work operations at Contractor's expense.

B. Arrange for disconnection and seal or cap all utilities and services designated to be removed before start of site work operations. Perform all work in accordance with the requirements of the applicable utility company or agency involved.

C. When uncharted or incorrectly charted underground piping or other utilities and services are encountered during site work operations, notify the Engineer and the applicable utility company immediately to obtain procedure directions.

Cooperate with the applicable utility company in maintaining active services in operation.

D. Locate, protect, and maintain benchmarks, monuments, control points and project engineering reference points. Reestablish disturbed or destroyed items at Contractor's expense.

E. Perform site work operations and the removal of debris and waste materials to assure minimum interference with streets, walks, and other adjacent facilities.

F. Obtain governing authorities' written permission when required to close or obstruct street, walks and adjacent facilities. Provide alternate routes around closed or obstructed traffic ways when required by governing authorities.

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G. Control dust caused by work. Dampen surfaces as required. Comply with pollution control regulations of governing authorities.

H. Protect existing buildings, paving, and other services or facilities on site and adjacent to the site from damage caused by site work operations. Cost of repair and restoration of damaged items at Contractor's expense.

I. Protect and maintain street lights, utility poles and services, traffic signal control boxes, curb boxes, valves and other services, except items designated for removal. Remove or coordinate the removal of traffic signs, parking meters and postal mail boxes with the applicable governmental agency. Provide for temporary relocation when required to maintain facilities and services in operation during construction work.

J. Preserve from injury or defacement all vegetation and objects designated to remain.

PART 2 � PRODUCTS

2.01 Materials and equipment

Materials and equipment: As selected by Contractor, except as indicated in contract documents.

PART 3 � EXECUTION

3.01 Preparation

A. Examine the areas and conditions under which site work is performed. Do not proceed with the work until unsatisfactory conditions are corrected.

B. Consult the records and drawings of adjacent work and of existing services and utilities which may affect site work operations.

END OF SECTION

WALT STEPHENS & ROCK CUT ROAD 02050-1 DEMOLITION

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SECTION 02050

DEMOLITION

PART 1 � GENERAL

1.01 Scope

A. The work covered under this Section includes furnishing all labor, equipment and material required to remove asphalt pavements designated for demolition as shown on the Drawings, directed by the Engineer or required for the completion of the Work, including all necessary saw cutting, excavation and backfilling.

B. The work specified herein and shown on the Drawings is intended to show the extent of the scope of this work but must not be construed as covering it entirely. The Contractor shall visit the site and judge the amount of work required and the problems anticipated in the performance of the work.

1.02 Submittals

A. Submittals shall be made in accordance with the requirements of the General

Conditions of the Contract Documents. In addition, the following specific information shall be provided:

1. The Contractor shall submit to the Engineer, prior to beginning work, a schedule of demolition and detail the methods to be used.

2. The Contractor shall develop and submit a demolition plan which includes a demolition schedule that covers:

a. Stationing from and to with start and finish dates.

b. Proposed method of demolition.

c. Approved haul routes and permit(s) to and from the site.

PART 2 � PRODUCTS

2.01 Materials

A. The Contractor shall provide all materials and equipment in suitable and adequate quantity as required to accomplish the work shown, specified herein, and as required to complete the project.

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PART 3 � EXECUTION

3.01 General

A. Shutdown of Existing Operations and Utilities

1. The existing facilities are required to remain in service during construction.

2. Prior to making any pavement removals, saw cut pavements to full depth.

3. Remove designated trees and stumps to at least 2 feet below grade.

B. Protection

1. Take care to prevent the spread of dust and flying particles. Sprinkle rubbish and debris with water to keep dust to a minimum. Install, operate, and maintain erosion control measures at all times.

PERSONNEL: Perform work by personnel experienced in this type work and in such a manner as to eliminate hazards to persons and property without interference with new work and with use of adjacent areas, public rights-of-way, utilities and structures.

3.02 Concrete Demolition

A. According to drawings

3.03 Masonry Demolition (Not Used)

3.04 Removal Of Existing Equipment and Piping

Removal of existing equipment, piping and appurtenances as shown on the

Contract Drawings.

3.05 Protection Of Work and Existing Facility

A. Perform the work in a manner that will not damage parts of the site, or systems not intended to be removed. If in the opinion of the Engineer, the method of demolition or cutting may endanger or damage parts of the structure(s) or affect the operation of the facilities, promptly change the method when so notified by the Engineer. Perform all cutting required regardless whether such cutting is specifically indicated. Examine the existing structures, evaluate conditions to be encountered in accomplishing the work, and accommodate such requirements accordingly in the Bid Proposal.

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B. The Contractor shall exercise full care and shall use such methods and equipment during removal as will maintain the usefulness of vehicular access to telecommunications and antennas at the site at all times.

C. Any damage done to structures or equipment during removal and any patching, plugging of holes or repairs necessitated because of removal of equipment and piping shall be repaired to the satisfaction of the Engineer and the cost thereof shall be included in the Contract Price.

3.06 Disposal

A. Disposal: All rubble and waste material shall be hauled off site as it is removed.

Stockpiling is not permitted at any time. The Contractor shall be fully responsible for proper disposal of waste materials in accordance with all federal, state and local laws at no additional cost to the County.

B. Contractor shall not dispose of any trash, material, equipment, or litter on the site. Contractor shall be responsible for any damage to any facilities, tanks or equipment which is damaged by any such foreign material.

3.07 Disposition Of Salvageable Materials (Not Used)

The owner shall dictate any items to be salvaged or reused, by providing written notice, of items to be recovered and protected during the demolition operation.

3.08 Rehabilitation (Not Used)

WALT STEPHENS & ROCK CUT ROAD 02110-1 CLEARING AND GRUBBING

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SECTION 02110

CLEARING AND GRUBBING

PART 1 � GENERAL

1.01 Scope

A. Work described in this Section includes furnishing all labor, materials, equipment, tools and incidentals required for all clearing and grubbing including, but not limited to, the removal from the site of trees, stumps, roots, brush, structures, abandoned utilities, trash, debris and all other materials found on or near the surface of the ground in the construction area and understood by generally accepted engineering practice not to be suitable for construction of the type contemplated.

B. The extent of clearing is that minimum degree of clearing necessary to carry out all construction activities including construction of appurtenances. Areas protected by silt fences, tree save and other fencing shall not be disturbed at any time.

C. Clearing and grubbing operations shall be coordinated with temporary and permanent erosion control requirements.

D. Clearing operations include, but are not limited to, the following:

1. Protection of existing trees and other vegetation

2. Removal of trees and other vegetation

E. Related Work Specified Elsewhere:

1. Division 1 General Requirements

2. Section 02125, Temporary and Permanent Erosion and Sediment Control.

3. Section 02050, Demolition.

4. Section 02200, Excavation and Backfill.

1.02 Job Conditions

A. Protection of Existing Improvements:

1. Provide barricades, coverings, or other types of protection necessary to prevent damage to existing improvements.

2. Protect improvements on adjoining properties as well as those on the project

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site. Restore improvements damaged by this work to their original condition, as acceptable to the Engineer. Replace property line monuments (such as iron pins) removed or disturbed by clearing operations under the direction of a Land Surveyor licensed in the State of Georgia.

B. Protection of Existing Trees and Vegetation:

1. Protect existing trees and other vegetation to avoid cutting, breaking or skinning of roots, skinning and bruising of bark, smothering of trees by stockpiling construction materials or excavated materials within drip lines, foot or vehicular traffic, and parking of vehicles or equipment within drip line. Provide temporary fences, barricades or guards as required to protect trees and vegetation to be left standing.

2. Provide protection for tree roots over 1-1/2 inches diameter that are cut during any construction operation. Coat the cut faces with emulsified asphalt, or other acceptable coating, especially formulated for horticultural use on cut or damaged plant tissues. Temporarily cover all exposed roots of trees with wet burlap to prevent roots from drying out; provide earth cover as soon as possible.

3. Repair or replace damaged trees and vegetation resulting from any construction operation, in a manner acceptable to the Engineer. A qualified arborist approved by the engineer shall perform tree damage repair at no cost to the Owner. Replace damaged trees that cannot be repaired and restored to full-growth status, as determined by the Engineer.

PART 2 � PRODUCTS (Not Used)

PART 3 � EXECUTION

3.01 Existing Trees and Vegetation

A. Avoid cutting or injuring trees designated to remain. Other trees cut or injured shall be solely at Contractor expense to obtain permits, approvals, and pay all fees to the

Owner before cutting and hauling off site.

3.02 Clearing and Grubbing

A. Clearing operations shall begin no more than seven days before beginning construction work for any area.

B. Materials to be cleared, grubbed and removed from the project site include but are not limited to vegetation, trees, stumps, roots, lawns, shrubbery, gardens, paving, miscellaneous structures, debris, and abandoned utilities to the minimum practicable extent to complete the work. Limit clearing to a single lane work route without provision for construction vehicles to pass utility operation.

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C. Grubbing shall consist of completely removing roots, stumps, trash and other debris from all areas to be graded so that topsoil is free of roots and debris. Topsoil is to be left sufficiently clean so that further picking and raking will not be required.

D. All stumps, roots, foundations and planking embedded in the ground shall be removed and disposed of. Stumps and roots larger than 1 inch shall be grubbed and removed to a depth not less than 4 feet below grade. All holes or cavities which extend below the subgrade elevation of the proposed work shall be filled with crushed rock or other suitable material, compacted to the same density as the surrounding material.

E.Where the tree limbs interfere with utility wires, or where the trees to be felled are in close proximity to utility wires, the tree shall be taken down in sections to eliminate the possibility of damage to the utility.

F. Any work pertaining to utility poles shall comply with the requirements of the appropriate utility.

G.All fences adjoining any excavation or embankment that, in the Contractor's opinion, may be damaged or buried, shall be carefully removed, stored and replaced. Any fencing that is damaged shall be replaced with new fence material of equal or better quality and construction.

H.Stumps and roots shall be grubbed and removed to a depth not less than two feet below grade. All holes or cavities which extend below the subgrade elevation of the proposed work shall be filled with crushed rock or other suitable material, compacted to the same density as the surrounding material

I. Burying of residual materials and organics will not be allowed.

J. The Contractor shall utilize special precautions required for the protection and preservation of trees, cultivated shrubs, sod, fences, etc. situated within the construction area but not directly within excavation and/or fill limits. The Contractor shall be responsible for repair or replacement of any items damaged as a result of its operations.

3.03 Holes and Depressions

A. Fill holes, depressions and voids created or exposed by clearing operations with non-organic soil material approved by the Engineer.

B. Backfill pavement removal areas with non-organic topsoil in horizontal layers not exceeding six inches loose-depth and compact to 95 per-cent standard Proctor.

3.04 Disposal of Waste Materials

A. Disposal General Requirements: Dispose cleared matter daily so as to maintain site

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in a safe and neat condition throughout the contract period. Owners of the property may remove merchantable timber, buildings or other items from the work site before the Contractor begins operations, and no assurance exists that any such material will be on the work site when the Contractor begins work.

B. On-Site Disposal:

1. When authorized by the Engineer, cut tree trunks and limbs, over two inches in diameter, into 48- i n c h lengths and neatly stack within work limits on the same property as that on which the tree originally grew.

C.The debris resulting from the clearing and grubbing operation shall be hauled to a disposal site secured by the Contractor and shall be disposed of in accordance with all requirements of federal, state, county and municipal regulations. No debris of any kind shall be deposited in any stream or body of water, or in any street or alley.

No debris shall be deposited upon any private property except with written consent of the property owner. In no case shall any material or debris be left on the project site, shoved onto abutting private properties, or buried on the project site.

3.05 Construction Access Route on Easement (Not Used)

3.06 Tree Removal on Easements (Not Used)

WALT STEPHENS & ROCK CUT ROAD 02125-1 TEMPORARY AND PERMANENT

CULVERT REHABILITATION PROJECT EROSION AND SEDIMENTATION CONTROL

RT-SW-22-08 AUGUST 2024

SECTION 02125

TEMPORARY AND PERMANENT EROSION AND SEDIMENTATION CONTROL

PART 1 � GENERAL

1.01 Scope

A. Work under this section includes furnishing all labor, materials, equipment and incidentals required to install and maintain temporary and permanent erosion and sedimentation controls as shown on the Drawings and as specified herein.

B. Temporary and permanent erosion and sedimentation controls include mulching and grassing of disturbed areas and structural barriers at those locations which will ensure that erosion during construction will be maintained within acceptable limits. Acceptable limits are as established by the Georgia Environmental Protection Division (EPD) and applicable codes, ordinances, rules, regulations, and laws of local and municipal authorities having jurisdiction.

C. The temporary and permanent erosion and sedimentation control measures shown on the Drawings are minimum requirements. The Contractor shall notify the Engineer of any changes and/or additions to the erosion and sedimentation control measures necessary to accommodate the Contractor�s means and methods of operation. Any additional erosion and sedimentation control measures required by the Contractor�s means and methods of operation will be installed by the Contractor at no additional cost to the Owner.

D. The Contractor shall be solely responsible for the control of erosion and sediment production within the Project area. The Contractor shall install controls that will ensure that storm water and drainage from the disturbed area of the Project site will be filtered or otherwise managed to minimize impacts on receiving waters and/or existing storm drains. Discharged waters shall be free of soil particles and shall meet all applicable permit turbidity requirements.

1.02 Submittals

A. Submittals shall be made in accordance with the requirements of the General Conditions of the Contract Documents.

1.03 Quality Assurance

A. The Contractor shall designate a worksite erosion control supervisor. The supervisor shall have the responsibility and authority to coordinate all equipment, personnel and materials needed to maintain project site erosion and sediment control in accordance with the management practices and standards established in the Manual for Erosion and Sediment Control in Georgia, the Drawings and Specifications.

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B. Within 15 days after receipt of the Notice to Proceed, the Contractor shall submit the name and contact data for the designated erosion control supervisor.

The supervisor shall be an individual with an active minimum Level 1A certification as issued by the Georgia Soil and Water Conservation Commission.

C. The erosion control supervisor shall execute NPDES sampling after each rain event and collect samples for laboratory testing as required by the designated NPDES permit.

PART 2 � PRODUCTS

2.01 Materials

A. Silt fence: Silt fence shall be as detailed on the Drawings and shall meet the requirements of Section 171 � Silt Fence of the GDOT Department of Transportation Standard Specifications.

1. Silt fence fabric shall conform to GDOT Standard Specification Section 881.2.07.

2. Silt fencing shall conform to GDOT Standard Specification Section 894.

3. Silt fence posts and bracing shall conform to GDOT Standard Specification Section 862.

B. Hay bales shall be clean, seed-free cereal hay type, rectangular in shape.

C. Woven wire fence backing shall be ½-inch, galvanized steel, chicken-wire mesh.

D. Filter stone shall be crushed rock conforming to Georgia Department of Transportation Table 800.01, Size Number 57.

E. Concrete block shall be hollow, non-load bearing type.

F. Concrete shall be 3500 psi in accordance with Section 03310, Cast-in-Place Concrete.

G. Plywood shall be ¾-inch thick exterior type.

2.02 Rip Rap

A. Use only one method throughout the Project.

B. Stone Rip Rap shall consist of sound, tough, durable stones resistant to the action of air and water. Slabby or shaley pieces will not be acceptable. Specific

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gravity shall be 2.0 or greater. Rip rap shall have less than 66 percent wear when tested in accordance with AASHT0 T-96. Unless shown on the Drawings or specified otherwise, stone rip- rap shall be type 3.

1. Type 1 Rip Rap: The largest pieces shall have a maximum approximate volume of two cubic feet. At least 35 percent of the mass shall be comprised of pieces which weigh 125 pounds or more. The remainder shall be well graded down to the finest sizes. Rock fines shall comprise a maximum of 10 percent of the total mass. Rock fines are defined as material passing a No. 4 sieve. Rip rap size shall conform to Georgia Department of Transportation Standard Specification Section 805 - Stone Dumped Rip Rap, Type 1.

2. Type 3 Rip Rap: The largest pieces shall have a maximum approximate volume of one cubic foot. At least 35 percent of the mass shall be comprised of pieces which weigh 15 pounds or more. The remainder shall be well graded down to the finest sizes. Rock fines shall comprise a maximum of 10 percent of the total mass. Rock fines are defined as material passing a No. 4 sieve. Rip rap size shall conform to Georgia Department of Transportation Standard Specification Section 805 - Stone Dumped Rip Rap, Type 3.

2.03 Filter Fabric

A. Filter fabric for use under riprap shall meet the requirements of GDOT Standard Specification Section 881.2.05 for plastic filter fabric.

2.04 Construction Exit Stone

A. Stone shall be sound, tough, durable stone resistant to the action of air and water. Slabby or shaley pieces will not be acceptable. Aggregate size shall be in accordance with the National Stone Association Size R-2 (1.5 to 3.5-inch stone) or Type 3 Riprap as specified in paragraph 2.02 of this Section.

2.05 Grass

A. Permanent grass shall be of the same type that existed prior to construction.

B. Water: Water shall be free of excess and harmful chemicals, organisms and substances which may be harmful to plant growth or obnoxious to traffic. Salt or brackish water shall not be used. Water shall be furnished by the Contractor.

2.06 Erosion Control Fabric

A. Erosion control fabric shall meet the requirements of GDOT Standard Specification Section 713 for organic and synthetic material fiber blankets.

PART 3 � EXECUTION

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3.01 General

A. Basic Principles:

1. Conduct the earthwork and excavation activities in such a manner to fit the topography, soil type and condition.

2. Minimize the disturbed area and the duration of exposure to erosion elements.

3. Stabilize disturbed areas immediately.

4. Safely convey run-off from the site to a stable outlet.

5. Retain sediment on site that is generated on site.

6. Minimize encroachment upon watercourses.

B. Temporary Erosion and Sedimentation Control: Temporary erosion and sedimentation control procedures shall be directed toward:

1. Preventing soil erosion at the source.

2. Preventing silt and sediment from entering any waterway if soil erosion cannot be prevented.

3. Preventing silt and sediment from migrating downstream in the event it cannot be prevented from entering the waterway.

C. Permanent Erosion Control: Permanent erosion control measures shall be implemented to prevent sedimentation of waterways and to prevent erosion of the Project site.

3.02 Sedimentation and Erosion Control Measures

A. Temporary and permanent erosion and sedimentation control measures shall prevent erosion and prevent sediment from exiting the site. If, in the opinion of the Engineer, the Contractor's temporary erosion and sedimentation control measures are inadequate, the Contractor shall provide additional maintenance for existing measures or additional devices to control erosion and sedimentation on the site at no additional cost to the Owner.

B. All erosion and sedimentation control devices and structures shall be inspected by the Contractor at least once a week and immediately prior to and after each rainfall occurrence. Any device or structure found to be damaged shall be repaired or replaced by the end of the day. Sediment ponds shall be cleaned out prior to the silt reaching the height or elevation shown on the Drawings.

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C. All erosion and sedimentation control measures and devices shall be constructed and installed as shown on the Drawings or specified herein and maintained until adequate permanent disturbed area stabilization has been provided or permanent pavement has been installed and accepted by the Engineer. After adequate permanent stabilization has been provided or permanent pavement has been installed and accepted by the Engineer, all temporary erosion and sedimentation control structures and devices shall be removed.

3.03 Sediment Control

A. Construction Exit:

1. Construction exit(s) shall be placed as shown on the Drawings and as directed by the Engineer. A construction exit shall be located at any point traffic will be leaving a disturbed area to a public right-of-way, street, alley, sidewalk or parking area.

2. Placement of Construction Exit Material: The ground surface upon which the construction exit material is to be placed shall be prepared to a smooth condition free from obstructions, depressions or debris. The plastic filter fabric shall be placed to provide a minimum number of overlaps and a minimum width of one foot of overlap at each joint. The stone shall be placed with its top elevation conforming to the surrounding roadway elevations. The stone shall be dropped no more than three feet during construction.

3. Construction Exit Maintenance: The Contractor shall regularly maintain the exit with the top dressing of stone to prevent tracking or flow of soil onto public right- of-way and paved surfaces as directed by the Engineer.

4. Construction Exit Removal: Construction exit(s) shall be removed and properly disposed of when the disturbed area has been properly stabilized, the tracking or flow of soil onto public right-of-way or paved surfaces has ceased and as directed by the Engineer.

B. Sediment Barriers:

1. Sediment barriers shall include, but are not necessarily limited to, silt fences, hay bales, rock check dams and inlet sediment traps and any device which prevents sediment from exiting the disturbed area.

2. Silt fences, hay bales and rock check dams shall not be used in any flowing stream, creek or river.

3. Sediment barriers shall be installed as shown on the Drawings and as

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directed by the Engineer.

4. Sediment barriers shall be maintained to ensure the depth of impounded sediment is no more than one half of the original height of the barrier or as directed by the Engineer. Torn, damaged, destroyed or washed-out barriers shall be repaired, reinforced or replaced with new material and installed as shown on the Drawings and as directed by the Engineer.

5. Sediment Barrier Removal:

a. Sediment barrier shall be removed once the disturbed area has been stabilized with a permanent vegetative cover or permanent pavement has been installed and the sediment barrier is no longer required as directed by the Engineer.

b. Accumulated sediment shall be removed from the barrier and removed from the site.

c. All non-biodegradable parts of the barrier shall be disposed of properly.

The hay bales may be spread evenly across disturbed areas as a mulching material.

d. The disturbed area created by barrier removal shall be permanently stabilized.

3.04 Erosion Control

A. Grassing

1. Grassing shall be as specified in paragraph 3.05 of this Section

2. Temporary Stabilization: Temporary stabilization shall be provided as shown on the Drawings and conforming to these Specifications to control erosion on the site. Temporary stabilization shall be provided to any area which will not receive permanent stabilization within the next 14 calendar days. Partial payment requests may be withheld for those portions of the Project not complying with this requirement.

3. Permanent Stabilization:

a. Permanent stabilization shall be provided as shown on the Drawings and conforming to these Specifications to control erosion on the site.

Permanent stabilization shall be provided to all areas of land disturbance within seven calendar days of the completion of land disturbance for any area greater than 0.25 acre. Partial payment requests may be withheld for those portions of the Project not complying with this requirement.

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b. Grass or sod removed or damaged in residential areas shall be replanted with the same variety within seven calendar days of the completion of work in any area.

c. Where permanent stabilization cannot be immediately established because of an inappropriate season, the Contractor shall provide temporary stabilization. The Contractor shall return to the site at the appropriate season to provide permanent stabilization in areas that received only temporary stabilization.

3.05 Grassing

A. General:

1. When final grade has been established, all bare soil, unless otherwise required by the Contract Documents, shall be seeded, fertilized and mulched in an effort to restore to a protected condition.

2. Specified permanent grassing shall be performed at the first appropriate season following establishment of final grading in each section of the site.

3. All references to grassing, unless noted otherwise, shall relate to establishing permanent vegetative cover as specified herein for seeding, fertilizing, mulching, etc.

4. Permanent grassing shall be of a perennial species.

B. Grassing activities shall comply with the Manual for Erosion and Sediment Control in Georgia, specifically for the selection of species, planting dates and application rates for seeding, fertilizer, and mulching. Where permanent vegetative cover (grassing) cannot be immediately established (due to season or other circumstances) the Contractor shall provide temporary vegetative or mulch cover.

3.06 Rip-Rap

A. Unless shown otherwise on the Drawings, riprap shall be placed at all points where banks of streams or drainage ditches are disturbed by excavation, or at all points where their natural vegetation is removed. Carefully compact backfill and place rip rap to prevent subsequent settlement and erosion. This requirement applies equally to construction alongside a stream or drainage ditch as well as crossing a stream or drainage ditch.

B. Placement of Filter Fabric

1. The surface to receive fabric shall be prepared to a relatively smooth condition free from obstructions, depressions, and debris. The fabric shall be

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placed with the long dimension running up the slope and shall be placed to provide a minimum number of overlaps. The strips shall be placed to provide a minimum width of one foot of overlap for each joint. The filter fabric shall be anchored in place with securing pins of the type recommended by the fabric manufacturer. Pins shall be placed on or within 3-inches of the centerline of the overlap. The fabric shall be placed so that the upstream strip overlaps the downstream strip. The fabric shall be placed loosely so as to give and therefore avoid stretching and tearing during placement of the stones.

2. The fabric shall be protected at all times during construction from clogging due to clay, silts, chemicals or other contaminants. Any contaminated fabric or any fabric damaged during its installation or during placement of riprap shall be removed and replaced with uncontaminated and undamaged fabric at no expense to the Owner.

C. Placement of Riprap

1. The riprap shall be placed on a 6-inch layer of soil, crushed stone or sand overlaying the filter fabric. This 6-inch layer shall be placed to maximize the contact between the soil beneath the filter fabric and the filter fabric. Riprap shall be placed with its top elevation conforming to the finished grades or the natural slope of the stream bank and stream bottom.

2. The stones shall be dropped no more than 3 feet during construction.

3. Stone riprap shall be dumped into place to form a uniform surface and to the thickness specified on the Drawings. The thickness tolerance for the course shall be -6-inches and +12-inches. If the Drawings do not specify a thickness, the course shall be placed to a thickness of not less than 18-inches.

3.07 Clean-Up

A. Remove and dispose of all excess erosion and sedimentation control devices and materials when no longer needed or at the completion of construction as directed by the Engineer. Clean out sediment control basins to an elevation at least one foot lower than the elevations shown on the Drawings.

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SECTION 02140

DEWATERING

PART 1 � GENERAL

1.01 Scope

A. Construct all permanent Work in areas free from water. Design, construct and maintain all dikes, levees, cofferdams and diversion and drainage channels as necessary to maintain the areas free from water and to protect the areas to be occupied by permanent work from water damage. Remove temporary works after they have served their purpose.

B. The Contractor shall be responsible for the stability of all temporary and permanent slopes, grades, foundations, materials and structures during the course of the Contract.

Repair and replace all slopes, grades, foundations, materials and structures damaged by water, both surface and sub-surface, to the lines, grades and conditions existing prior to the damage at no additional cost to the Owner.

1.02 Submittals

A. Informational Submittals

1. Water control plan.

2. Ground water monitoring plan.

3. Well permits.

4. Discharge permits.

5. Water Level Elevations Observed in Observation Wells: Submit same day measured.

6. Settlement Benchmark Elevations: Submit weekly record.

7. Inflow Measurements: Submit weekly record.

1.03 Water Control Plan

A. As a minimum, include:

1. Descriptions of proposed groundwater and surface water control facilities including, but not limited to, equipment; methods; standby equipment and power supply, means of measuring inflow to excavations, pollution control facilities, discharge locations to be utilized, and provisions for immediate temporary water supply as required by this section.

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2. Drawings showing locations, dimensions, and relationships of elements of each system.

3. Design calculations demonstrating adequacy of proposed dewatering systems and components.

B. If the system is modified during installation or operation revise or amend and resubmit Water Control Plan.

PART 2 � PRODUCTS (Not Used)

PART 3 � EXECUTION

3.01 General

A. Continuously control water during course of construction, including weekends and holidays and during periods of work stoppages, and provide adequate backup systems to maintain control of water.

B. For Other Portions of the Project: Remove and control water during periods when necessary to properly accomplish Work.

3.02 Surface Water Control

A. See Section 02125 Temporary and Permanent Erosion and Sedimentation Control.

B. Remove surface runoff control when no longer needed.

3.03 Dewatering Systems

A. Provide, operate, and maintain dewatering systems of sufficient size and capacity to permit excavation and subsequent construction in dry and to lower and maintain groundwater level a minimum of 3 feet below the lowest point of excavation.

Continuously maintain excavations free of water, regardless of source, and backfilled to final grade.

B. Provide, operate, and maintain recharging systems (which may include reinjection wells and infiltration trenches) of sufficient size and capacity to prevent and drop in groundwater table adjacent to existing structures, underground utilities, and roadways due to dewatering.

C. Dewatering systems shall include wells or well points, and other equipment and appurtenances installed outside limits of excavations and sufficiently below lowest point of excavation, or to maintain specified groundwater elevation.

D. Design and Operate Dewatering Systems

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1. To prevent loss of ground as water is removed.

2. To avoid inducing settlement or damage to existing facilities, completed Work, or adjacent property.

3. Toe relieve artesian pressures and resultant uplift of excavation bottom.

E. Provide sufficient redundancy in each system to keep excavation free of water in event of component failure.

F. Provide 100 percent emergency power backup with automatic startup and switchover in event of electrical power failure.

G. Provide supplemental ditches and sumps only as necessary to collect water from local seeps. Do not use ditches and sumps as primary means of dewatering.

3.04 Monitoring Flows

A. Monitor volume of water pumped per calendar day from excavations, as Work progresses. Also monitor volume of water introduced each day into excavations for performance of Work. Monitor flows using measuring devices acceptable to the Engineer.

3.05 Disposal of Water

A. Obtain discharge permit for water disposal from authorities having jurisdiction.

B. Treat water collected by dewatering operations, as required by regulatory agencies, prior to discharge.

C. Discharge water as required by discharge permit and in manner that will not cause erosion or flooding, or otherwise damage existing facilities, completed Work, or adjacent property.

D. Remove solids from treatment facilities and perform other maintenance of treatment facilities as necessary to maintain their efficiency.

3.06 Protection of Property

A. Make assessment of potential for dewatering induced settlement. Provide and operate devices or systems, including but not limited to reinjection wells, infiltration trenches and cutoff walls, necessary to prevent any settlement and/or related damage to existing facilities, completed Work, and adjacent property.

B. Securely support existing facilities, completed Work, and adjacent property vulnerable to settlement due to dewatering operations. Support shall include, but not be limited to, bracing, underpinning, or compaction grouting.

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3.07 Remediation of Groundwater Depletion

A. If dewatering reduces quantity or quality of water produced by existing wells, temporarily supply water to affected well owners from other sources. Furnish water of a quality and quantity equal to or exceeding the quality and quantity available to well owner prior to beginning the Work or as satisfactory to each well owner.

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SECTION 02150

SHEETING, SHORING AND BRACING

PART 1 � GENERAL

1.01 Scope

A. This section specifies requirements for sheeting, shoring, and bracing of trenches and excavations greater than 5-feet in depth. Where shoring, sheeting, bracing or other supports are necessary, they shall be furnished, placed, maintained, and except as specified otherwise, removed by the Contractor.

B. Design Requirements:

1. The design, planning, installation and removal, if required, of all sheeting, shoring, lagging, and bracing shall be accomplished in such a manner as to maintain the required excavation or trench section and to maintain the undisturbed state of the soils below and adjacent to the excavation.

2. The Contractor shall design sheeting, shoring, and bracing in accordance with the OSHA Safety and Health Standards as well as state and local requirements.

3. Horizontal strutting below the barrel of a pipe and the use of pipe as support are not acceptable.

4. When the construction sequence of structures requires the transfer of bracing to the completed portions of any new structure or to any existing structure, the Contractor shall provide the Engineer with a complete design analysis of the expected impact of that bracing on the structure. This action shall in no way absolve the Contractor of responsibility of damage resulting from said bracing.

1.02 References

A. This section contains references to the following documents. They are a part of this section as specified and modified. In case of conflict between the requirements of this section and those of the listed documents, the requirements of this section shall prevail.

Reference Title

OSHA 2207 OSHA Safety and Health Standards, Latest Edition

1.03 Submittals

A. Prior to starting any excavation work requiring sheeting, shoring, and bracing, the Contractor shall submit his plans for trench and excavation support systems to the Engineer as working drawings in accordance with the requirements of the General

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Conditions. No provisions of the above requirements shall be construed as relieving the Contractor of his overall responsibility and liability for the work.

B. The Contractor shall submit a Certification of Compliance properly identified with the project name and project location. The Certification shall state that the sheeting, shoring and bracing have been designed in accordance with the prevailing codes and standards by a Professional Engineer registered in the State of Georgia with the Engineer�s seal and signature appearing on the certification. Calculations shall not be submitted unless specifically requested by the Engineer.

PART 2 � PRODUCTS (Not Used)

PART 3 � EXECUTION

3.01 General

A. The construction of sheeting, shoring and bracing shall not disturb the state of soil adjacent to the trench and below the excavation bottom.

B. Trench sheeting below the top of a pipe shall be left in place.

C. Excavation shall not be started until the design for support systems has been accepted by the Engineer.

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SECTION 02200

EXCAVATION AND BACKFILL

PART 1 � GENERAL

1.01 Scope

A. The work under this Section includes earthwork and related operations, relating specifically to structural and site work including, but not limited to;

excavating all classes of material encountered, including blasting;

handling; storage; transportation; and disposal of all excavated and unsuitable material; construction of fills and embankments; backfilling around structures; backfilling all pits; compacting; all sheeting; shoring and bracing; preparation of subgrades; surfacing and grading; and any other similar, incidental, or appurtenant earthwork operation which may be necessary to properly complete the Work.

B. The Contractor shall provide all services, labor, materials, and equipment required for all earthwork and related operations necessary or convenient to the Contractor for furnishing complete Work as shown on the Drawings or specified in these Contract Documents.

C. Related Work specified elsewhere:

1. Section 01410 Testing Laboratory Services

2. Section 02125 Temporary and Permanent Erosion and Sedimentation Control

3. Section 02140 Dewatering

4. Section 02700 Removing and Replacing Pavement

1.02 General

A. Safety: Comply with local regulations and with provisions of the �Manual of Accident Prevention in Construction� of the Associated General Contractors of America, Inc. Occupational Safety and Health Act (OSHA) and all other applicable safety regulations.

B. The elevations shown on the Drawings as existing are taken from the best available data and are intended to give reasonable information about the existing elevations. The Contractor shall verify conditions to determine the exact quantities of excavation and fill required.

C. Earthwork operations shall be performed in a safe and proper manner with appropriate precautions being taken against all hazards.

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D. All excavated and filled areas for structures, fills, topsoil areas, embankments and channels shall be maintained by the Contractor in good condition at all times until final acceptance by the Owner. All damage caused by erosion or other construction operations shall be repaired by the Contractor using material of the same type as the damaged material at no cost to the Owner.

E. The Contractor shall control grading in a manner to prevent water running into excavations. Obstruction of surface drainage shall be avoided and means shall be provided whereby storm water can flow uninterrupted in existing open ditches or channels; other surface drains; or temporary drains.

F. No classification of excavated materials will be made. Excavation work shall include the removal and subsequent handling of all materials excavated or otherwise removed in performance of the Work, regardless of the type, character, composition or condition thereof.

G. The Contractor shall determine the appropriate means, methods, and techniques to make excavations shown on the drawings, regardless of the type of material encountered. Contractor shall make supplemental geotechnical investigations at no additional cost to the Owner to determine the character of subsurface materials encountered.

H. The soil testing will be performed by the Contractor�s testing laboratory.

As a minimum at least one density test shall be performed for every 5,000 square feet of fill area and every two feet of fill lift.

I. Should the Owner choose to conduct its own testing, the Contractor shall make all necessary excavations and shall supply any samples of materials necessary for conducting compaction and density tests. The cost of all retests made necessary by the failure of materials supplied by the Contractor, his agents or subcontractors, to conform to the requirements of these Contract Documents shall be paid by the Contractor. Contractor shall provide at least 24 hours advance notice of earthwork operations to the Testing Laboratory. Testing Laboratory shall provide reports to the Engineer with copies to the Contractor certifying (and sealed by a Registered Georgia Engineer) that earthwork is in conformance with the plans and specifications. The Testing laboratory shall witness the placement of all fill, unless otherwise directed by the Engineer.

J. All earthwork operations shall comply with the requirements of OSHA Construction Standards, Part 1926, Subpart P, Excavations, Trenching, and Shoring, and Subpart O, Motor Vehicles, Mechanized Equipment, and Marine Operations, and shall be conducted in a manner acceptable to the Engineer.

K. Stockpile Areas: Provided there is space available, stockpiling material

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may be on the Shaft access road site in areas to receive fill in subsequent phases of construction.

1.03 Submittals

A. Submittals shall be made in accordance with the requirements of the general conditions of the contract documents. In addition, the following specific information shall be provided:

1. Copies of permits obtained by the Contractor for the work.

2. Test results, certification of compliance, source and samples for all imported materials.

B. Samples of fill materials to be used. Samples shall be submitted 2 weeks in advance of use and shall consist of 0.5 cubic feet of each type of material.

C. Test reports for compaction.

D. Regulations: Subcontractor shall obtain at least two copies of all applicable federal, state and local codes, laws, regulations and ordinances regarding the use of explosives. One copy of these codes, laws, regulations and ordinances shall be submitted to the Engineer at least 14 days prior to blasting. The second copy shall be maintained on-site in the Subcontractor's office, for review by all Subcontractor personnel involved in blasting.

E. Subcontractor Qualifications and Evidence of Experience: Submit resumes of proposed blasting consultant and blasting supervisors to the Engineer. Resumes shall contain listing of experience, references with phone numbers and copies of all required blasting licenses.

1.04 Quality Assurance

A. Reference standards: Comply with all federal, state and local laws or ordinances, as well as all applicable codes, standards, regulations and/or regulatory agency requirements including the partial listing below:

1. ASTM C136-84a, Standard Method for Sieve Analysis of Fine and Coarse Aggregates.

2. ASTM D1556-82, Test Method for Density of Soils in Place by the Sand Cone Method.

3. ASTM D1557-78, Test Methods for Moisture-Density Relations of Soils and Soil- Aggregate Mixtures Using 10-lb (4.5-kg) Rammer and 18-in.

(457-mm Drop).

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4. ASTM D3107-88, Test Method for Moisture Content of Soil and Soil Aggregate in Place by Nuclear Methods (Shallow Depth).

PART 2 � PRODUCTS

2.01 Materials

A. Earthwork Materials

1. Controlled Fill:

a. Proposed fill soils shall be laboratory tested prior to construction use to determine their suitability. All fill material shall be subject to the approval of the Engineer.

b. Notification: For approval of imported fill material, notify the Engineer and Testing Laboratory at least three (3) weeks in advance of intention…