Technical_Provisions.pdf

01025-1 Specifications Division 2 – Special Technical Provisions

Philippe Park Living Shoreline Project

SPECIAL TECHNICAL PROVISIONS

PREPARED FOR:

Pinellas County 22211 U.S. 19 North, Bldg. 10

Clearwater, Florida 33765

PREPARED BY:

Environmental Science Associates 5404 Cypress Center Dr., Suite 125

Tampa, Florida 33609

I hereby certify that the design of this project was prepared under my personal direction and control, complies with the applicable standards and Local, State and Federal Regulations.

Bryan D. Flynn Florida Professional Engineer No 70856

Date: February 5, 2024

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DIVISION 2 – SPECIAL TECHNICAL PROVISIONS

Table of Contents

DIVISION 2 – SPECIAL TECHNICAL PROVISIONS 2

SECTION 005-0700-SURVEY, CONSTRUCTION LAYOUT & SECTION 005-08580-SURVEY,AS-BUILT

REQUIREMENTS ERROR! BOOKMARK NOT DEFINED.

SECTION 102 - MAINTENANCE OF TRAFFIC 4

SECTION 104 - PREVENTION, CONTROL, AND ABATEMENT OF EROSION AND WATER POLLUTION 7

SECTION 530 - RIPRAP (RUBBLE) 13

SECTION 901 – COARSE AGGREGATE – BEDDING STONE (3-6”) 16

SUPPLEMENTAL TECHNICAL SPECIFICATIONS SECTION

SECTION 903 - PRECAST BREAKWATER UNITS 18

SPECIAL PROVISIONS SECTION

SECTION 005-0700 – SURVEY CONSTRUCTION LAYOUT & SECTION 005-0850 – SURVEY,

AS-BUILT REQUIREMENTS

005-0700-SURVEY, CONSTRUCTION LAYOUT and 005-0850-SURVEY, AS-BUILT REQUIREMENTS are amended to include:

GENERAL

Maintain, prepare and provide the ENGINEER with record documents as specified below, except where otherwise specified or modified within the scope of work provided in the specific project contract documents. The Contractor and/or Developer shall be responsible for, and required to provide, As-built Drawings as outlined in this section.

AS-BUILT DRAWINGS

A. During the construction operation, the CONTRACTOR shall maintain records of all deviations from the approved Project Plans and Specifications and shall prepare them from “RECORD” drawings showing correctly and accurately all changes and deviations from the work made during construction to reflect the work as it was actually constructed.

B. The As-Built survey shall be performed and subsequent plans prepared by a

Professional Surveyor and Mapper, registered in the state of Florida and certified to the standards set forth in Chapter 472, Florida Statutes and Chapter 5J-17.050 Florida Administrative Code (Florida Minimum Technical Standards).

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C. Field measurements of vertical or horizontal dimensions of constructed improvements shall be obtained so that the constructed facility can be delineated in such a way that the location of the construction may be compared with the construction plans. Clearly shown by symbols, notations, or delineations, those constructed improvements located by the survey.

D. All vertical information (elevations) provided on the As-built Drawings shall be referenced to the North American Vertical Datum of 1988 (NAVD 88) unless otherwise specified by the Project Engineer.

E. The horizontal information provided on the As-built Drawings shall be referenced to the State of Florida, State Plane Coordinate System, Florida West Zone as established by Global Positioning System (GPS) which meets or exceeds Second Order Class I Accuracy Standards according to current publication of the Federal Geodetic Control Committee (FGCC) procedures.

F. All As-Built drawings shall be prepared in digital format (ACAD Civil 3D 2018) and shall utilize the digital design drawings as prepared by the Project Engineer as a base for the As-Built drawings. It is the responsibility of the Surveyor to request these files from the Contractor or COUNTY in order to produce the As-Built drawing set.

G. ALL improvements proposed to be constructed as shown on the approved construction plans shall be field measured upon completion and shown on the As-Built survey. Any improvements that appear in both plan and profile views shall show the As-Built information in both views.

H. The following items are required to be shown on all Pinellas County Project As-Built drawings submitted to the County:

SURVEY CONTROL

1. Install/re-establish: It shall be the contractor’s responsibility to hire a Professional

Surveyor and Mapper as defined per Chapter 472, Florida Statutes, to replace any horizontal and vertical control shown on the engineering plans that was destroyed during construction.

2. New roadway alignment control points (survey baseline or controlling line and all points as indicated on the plans or control sheet) upon final roadway completion.

Include all intersections and side streets. State plane coordinates and elevations for all control points.

3. If shown on plans or not: Any Public Land Corner or Governmental Survey Control point(s), vertical control (benchmarks), property corners destroyed and/or disturbed during the scope of the project shall be properly re-established as per standards as set forth within Florida Statutes, Administrative code and Minimum Technical Standards for that type of survey. All said surveying mentioned above shall be performed under the direct supervision of a registered Professional

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Surveyor and Mapper in the state of Florida and certified accordingly. Said Governmental agency(s) shall be notified in writing of disturbance and re-establishments.

AS-BUILTS DRAWINGS FORMAT - SUBMITTAL

A. ENGINEER will supply the CONTRACTOR with the electronic file of the approved construction plans for the input of the As-Built (record) information.

B. CONTRACTOR shall deliver three (3) certified sets of As-Builts with Electronic

Drawing files prepared in AutoCAD Civil 3D 2018 AND PDF format or in current version as agreed by the ENGINEER.

C. CONTRACTOR’s surveyor shall review, sign and seal As-Built drawing(s). Said drawing(s) shall clearly state type of survey, positional tolerances, adhere and be certified to by a registered Professional Surveyor and Mapper in the state of Florida, any standards set forth by Florida Statutes, Administrative code and Minimum Technical Standards for As-Built surveys.

D. All As-Built drawings are subject to review and approval by County Surveyor.

ACCURACY

The CONTRACTOR will be held responsible for the accuracy and completeness of Electronic and Hard Copy As-Built Drawings and shall bear any costs incurred as a result of incorrect data furnished by the CONTRACTOR.

COMPLETION OF WORK

Upon Substantial Completion of the Work, deliver As-Built Drawings to ENGINEER. Final payment will not be made until satisfactory record documents are received and approved by ENGINEER.

Item of Payment

Payment for the work specified in this item shall be made under:

Bid Item No. 005-0700 - SURVEY, CONSTRUCTION LAYOUT – Per Lump Sum

Bid Item No. 005-0850 – SURVEY, AS-BUILT REQUIREMENTS – Per Lump Sum

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SECTION 102 - MAINTENANCE OF TRAFFIC

The work specified in this item shall conform to Section 102 of the Florida Department of Transportation Standard Specifications for Road and Bridge Construction, and is amended to include:

A. GENERAL PROVISIONS-DESCRIPTION: The work specified in this Section consists of maintaining traffic within the limits of the project for the duration of the construction period, including any temporary suspensions of the work. It shall include the construction and maintenance of any necessary detour facilities; the providing of necessary facilities for access to residences, businesses, etc., along the project; the furnishing, installing and maintaining of traffic control and safety devices during construction, the control of dust through the use of calcium chloride if necessary, and any other special requirements for safe and expeditious movement of traffic as may be called for on the plans. The term, Maintenance of Traffic, as used herein, shall include all of such facilities, devices and operations as are required for the safety and convenience of the public as well as for minimizing public nuisance.

B. BEGINNING DATE OF CONTRACTOR'S RESPONSIBILITY: The Contractor shall present their Maintenance of Traffic Plan at the pre-construction conference. The Maintenance of Traffic Plan shall indicate the type and location of all signs, lights, barricades, striping and barriers to be used for the safe passage of pedestrians and vehicular traffic through the project and for the protection of the workmen. The plan will indicate conditions and setups for each phase of the Contractor's activities.

When the project plans include or specify a specific Maintenance of Traffic Plan, alternate proposals will be considered when they are found to be equal to or better than the plan specified.

In no case may the Contractor begin work until the Maintenance of Traffic Plan has been approved in writing by the Engineer. Modifications to the Maintenance of Traffic Plan that become necessary shall also be approved in writing. Except in an emergency, no changes to the approved plan will be allowed until approval to change such plan has been received.

The cost of all work included in the Maintenance of Traffic Plan shall be included in the pay item for Maintenance of Traffic.

The Contractor shall be responsible for performing daily inspections, including weekends and holidays, with some inspections at nighttime, of the installations on the project and replace all equipment and devices not conforming with the approved standards during that inspection. The project personnel will be advised of the schedule of these inspections and be given the opportunity to join in the inspection as is deemed necessary.

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C. TRAFFIC CONTROL - STANDARDS: The FDOT Design Standards for Design, Construction, Maintenance and Utility Operations On the State Highway System, Edition as dated on the plans set forth the basic principles and prescribes minimum standards to be followed in the design, application, installation, maintenance and removal of all traffic control devices and all warning devices and barriers which are necessary to protect the public and workmen from hazards within the project limits.

The standards established in the aforementioned manual constitute the minimum requirements for normal conditions, and additional traffic control devices warning devices, barriers or other safety devices will be required where unusual, complex or particularly hazardous conditions exist.

The above referenced standards were developed using F.H.W.A., U.S.D.O.T. Manual on Uniform Traffic Control Devices (MUTCD).

D. TRAFFIC CONTROL DEVICES, WARNING DEVICES AND BARRIERS -

INSTALLATION: The responsibility for installation and maintenance of adequate traffic control devices, warning devices and barriers, for the protection of the travel in public and workmen, as well as to safeguard the work area in general shall rest with the Contractor. Consideration shall be given to recommendations of the Engineer. The required traffic control devices, warning devices and barriers shall be erected by the Contractor prior to creation of any hazardous condition and in conjunction with any necessary re-routing of traffic. The Contractor shall immediately remove, turn or cover any devices or barriers which do not apply to existing conditions. All traffic control devices shall conform to MUTCD standards and shall be clean and relatively undamaged. Damaged devices diminishing legibility and recognition, during either night or day conditions, are not acceptable for use.

E. NO WAIVER OF LIABILITY: The Contractor shall conduct his operations in such a manner that no undue hazard will result due to the requirements of this article, and the procedures and policies described therein shall in no way act as a waiver of any of the terms of the liability of the Contractor or his surety.

F. Contractor’s Maintenance of Traffic Plan shall maintain continuous vehicular traffic on

Philippe Parkway at all times. The Contractor shall maintain one lane of traffic at all times during Philippe Park Living Shoreline Project Construction.

G. The Changeable Variable Message Sign shall be used as necessary. The location, message, and duration shall be as directed by Engineer.

Item of Payment

Payment for the work specified in this item shall be made under:

Bid Item No. 102 - Maintenance of Traffic – Per Lump Sum

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SECTION 104 - PREVENTION, CONTROL, AND ABATEMENT OF EROSION AND

WATER POLLUTION

Technical Specification 104-PREVENTION, CONTROL, AND ABATEMENT OF EROSION AND WATER POLLUTION is amended to include:

PART 1 – GENERAL

1.1 SCOPE

A. This Section covers erosion control and the treatment of dewatering water and stormwater runoff from the construction site and work area. Pollution control measures shall prevent polluted or turbid waters from being discharged from the construction site or work area to undeveloped portions of the site or offsite, including but not limited to Multiple Separate Storm Sewer Systems (MS4s) and Waters of the State.

B. The COUNTY considers pollution from dewatering water and stormwater runoff from a construction site or work area to be a very serious offense. The CONTRACTOR is solely responsible for preventing pollution caused by dewatering water and stormwater runoff from the construction site or work area. Note that state regulations do not allow mixing stormwater and dewatering groundwater in the same release – separate and independent discharges are required.

C. Pollution control measures specified herein represent minimum standards to be adhered to by the CONTRACTOR throughout the Project’s construction. The COUNTY reserves the right to require the CONTRACTOR to employ additional pollution control measures, when in the sole opinion of the COUNTY, they are warranted. If site specific conditions require additional erosion and stormwater pollution control measures during any phase of construction or operation to prevent erosion or to control sediment or other pollution, beyond those specified in the Drawings, the Project’s approved Stormwater Pollution Prevention Plan (SWPPP), or herein, implement additional best management practices as necessary, in accordance with Chapter 4, “Best Management Practices for Erosion and Sedimentation Control” of the Florida Erosion and Sediment Control Inspector’s Manual and other references as may be applicable or required by regulatory permits.

D. The COUNTY may terminate this Contract if the CONTRACTOR fails to comply with this Section. Alternatively, the COUNTY may halt the CONTRACTOR’s operations until the CONTRACTOR is in full compliance with this Section. If the COUNTY halts the CONTRACTOR’s Work as a result of failure to comply with this Section, the Contract time clock will continue to run.

E. In addition to these Specifications, comply with Chapter 4 - “Best Management Practices for Erosion and Sedimentation Control” and Chapter 5 – “Best Management Practices for Dewatering” of the Florida Erosion and Sediment Control Inspector’s Manual. In the event of a conflict between the referenced chapters and these Specifications, the more stringent requirement shall prevail.

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F. Submit to SWFWMD a “Notice to District of Dewatering Activity” (SWFWMD Form No. 40C-

2.900(12)) prior to commencement of dewatering in accordance with F.A.C. 40C- 2.042(9). Provide a copy of the Notice to Pinellas County.

1.2 PERMITS

A. The COUNTY has obtained certain permits for this project from the SWFWMD and

USACE. These permits will be provided to the CONTRACTOR at the Pre-Application Meeting for display. The CONTRACTOR must apply for and obtain all other required federal, state, and local permits, licenses, sampling, and tests, this may include NPDES permits or any building permits from the county municipality where the work is underway.

B. Provide copies of all approved permits to the COUNTY and ENGINEER and comply with all conditions contained in all permits at no extra cost to the COUNTY. If there is a conflict between any permit requirement and these Specifications or requirements between permits, the more stringent specification or requirement shall govern.

C. Pay for all required water quality sampling and laboratory tests.

1.3 GENERAL

A. Do not begin any other construction work until the pollution control and treatment system has been constructed in accordance with approved plans, permits, and these Specifications; and the installed system has been examined by the COUNTY for compliance.

B. From time to time, the COUNTY or ENGINEER will inspect the pollution control and treatment system and may take effluent samples for analysis by a testing laboratory selected and paid for by the COUNTY. If at any time, the COUNTY or ENGINEER determines that the pollution control and treatment system is not in compliance with the approved system, the COUNTY or ENGINEER will shut the portion of the project down that is not in compliance, and it shall remain shut-down until the pollution control and treatment system is properly constructed or repaired, and complies with the approved pollution control and treatment system plans, specifications, contract documents, and permits.

C. Schedule construction to minimize erosion and stormwater runoff from the construction site. Implement erosion control measures on disturbed areas as soon as practicable in portions of the site where construction activities have temporarily or permanently ceased, but in no case more than 7 days after the construction activity in that portion of the site has temporarily or permanently ceased. In addition to other temporary erosion control measures that may be implemented, application of polyacrylamide is required on all such disturbed areas within 7 days after the construction activity in that portion of the site has temporarily or permanently ceased, unless final landscaping has been installed.

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D. Inspect each pollution control system at least once per day and after each rainfall event.

Clean and maintain each pollution control system as required until the system is no longer needed. If a water quality violation occurs, immediately cease all work contributing to the water quality violation and correct the problem. Immediately report all water quality violations to the COUNTY. Immediately report the discharge of any hazardous substance to the State Warning Point at 800-320-0519 or 850-413-9911.

E. Discharge shall not violate State or local water quality standards in receiving waters, nor cause injury to the public health or to public or private property, nor to the Work completed or in progress. The receiving point for water from construction operations shall be approved by the COUNTY, regulatory agency, and the ENGINEER. The receiving point shall be shown on the Project SWPPP.

F. Promptly repair all damage at no cost to the COUNTY.

1.4 SUBMITTALS

A. Shop Drawings: Submit shop drawings of the proposed pollution control and treatment systems.

B. Approved Stormwater Pollution Prevention Plan.

C. “Contractor’s Affidavit Regarding Erosion Control and Treatment of Dewatering Water and Stormwater from Construction Activities”

1.5 STORMWATER TREATMENT AND EROSION CONTROL SYSTEM

RESPONSIBILITY

A. Prepare a site-specific design of the erosion and stormwater pollution control system.

Install and maintain all erosion and stormwater pollution control devices under the supervision of a State Certified Stormwater, Erosion, and Sedimentation Control Inspector. Maintain the erosion and stormwater pollution control devices until in the ENGINEER’s sole opinion, the devices are no longer necessary (such time not to extend past the date the COUNTY formally accepts the project as complete). Before beginning construction, submit to Pinellas County, Florida Department of Environmental Protection (FDEP) and other applicable regulatory agencies for review and approval, a Stormwater Pollution Prevention Plan (SWPPP), prepared by the certified erosion control subcontractor. Construction shall not begin until the SWPPP has been approved by Pinellas County, FDEP, and all applicable regulatory agencies.

Submit the approved SWPPP to the ENGINEER before beginning construction.

Include in the SWPPP, the “Contractor’s Affidavit Regarding Erosion Control and Treatment of Dewatering Water and Stormwater from Construction Activities” (located at the end of this Section).

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1.6 “POLLUTION” AND CERTAIN UNCONTESTABLE POLLUTION EVENTS DEFINED

A. With respect to this Section and as may be further defined in paragraphs 1.6.B, 1.6.C, and

1.6.D, “pollution” is the presence in off-site waters of any substances, contaminants, or manmade or human-induced impairment of off-site waters or alteration of the chemical, physical, biological, or radiological integrity of off-site water in quantities or at levels which are or may be potentially harmful or injurious to human health or welfare, animal or plant life, or property. Pollutants to be removed include but are not limited to, sediment and suspended solids, solid and sanitary wastes, phosphorus, nitrogen, pesticides, oil and grease, concrete truck washout, stucco mixer washout, curb machine washout, washout from other construction equipment, construction chemicals, and construction debris.

B. When the Discharge is Directly into an Existing Water Body

An existing water body (including ditches and canals) is defined to be polluted by the CONTRACTOR’s operations when at any time, the turbidity of the water immediately downstream of the CONTRACTOR’s discharge point(s) is at least 0 nephelometric turbidity units (NTUs) higher than the turbidity of the background water upstream of the discharge point(s). [See Fla. Administrative Code 62-302.530]. Exception: When the discharge is directly into or through an outfall discharging into “Outstanding Florida Waters,” designated by Florida Statute 403.061(27), the turbidity of the discharged water cannot exceed the turbidity of the immediate receiving water. The ENGINEER or COUNTY shall determine the locations where the turbidity is measured.

C. When the Discharge is not Directly into an Existing Water Body

In some instances, dewatering water or stormwater runoff from the construction site or work area may reach a water body indirectly, such as by overland flow. If the discharge water’s TSS and turbidity measurements exceed pre-construction background values by 0 percent for TSS and NTUs for turbidity, then the discharge is defined to be polluted.

D. When Pollution Always Occurs

The discharge from a construction site or work area is defined to be polluted whenever the pH of the discharge is less than 6.5 or greater than 8.5, or whenever any of the following is present in the discharge water:

(1) Hazardous waste or hazardous materials in any quantity,

(2) Any petroleum product or by-product in any quantity,

(3) Any chemical in any quantity, or

(4) Concentrated pollutants.

E. Above paragraphs 1.6.B, 1.6.C, and 1.6.D do not in any way, limit the types of conditions in which pollution may be determined to occur.

1.7 PENALTIES FOR NONCOMPLIANCE WITH THIS SECTION

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A. In addition to the COUNTY’s specific remedies, if erosion or pollution is caused by dewatering water or stormwater runoff from the construction site, the COUNTY may report the violations to Pinellas County Stormwater Enforcement, SWFWMD, FDEP, and other pertinent regulatory or enforcement agencies.

PART 2 - MATERIALS AND INSTALLATION

2.1 GENERAL

A. Staked Silt Fences:

1. General: Use silt fences to control runoff from the construction site where the soil has been disturbed.

2. Installation: Install per the manufacture’s recommendations and as specified herein. In general, install the silt fence in a manner that allows it to stop the water long enough for the sediment to settle while the water passes through the silt fence fabric. All supporting posts shall be on the down-slope side of the fencing. Place the bottom of the fabric 6-inches minimum, under compacted soil to prevent the flow of sediment underneath the fence. Place silt fences away from the toe of slopes. Otherwise, work shall conform to Section 104 of the Florida Department of Transportation Standard Specifications for Road and Bridge Construction.

3. Product: All material shall be new and unused. Use FDOT Types III through IV silt fences where large sediment loads are anticipated, where slopes are 1:2 (vertical: horizontal) or steeper, or as directed by the ENGINEER; otherwise use FDOT Type II silt fence.

B. Turbidity Barriers:

1. General: Use turbidity barriers to control sediment contamination of rivers, lakes, ponds, canals, etc.

2. Installation: Install per the manufacturer’s recommendations and per Section 104 of the Florida Department of Transportation Standard Specifications for Road and Bridge Construction unless directed otherwise by the ENGINEER. Under Bid Item 104-2, the CONTRACTOR shall install, maintain, and remove floating turbidity barriers to contain turbidity that may occur as the result of construction activities. As shown on the Drawings, the CONTRACTOR shall place the floating turbidity barrier prior to construction in 100’ – 200’ segments which shall be removed at the end of each day.

The CONTRACTOR may need to deploy turbidity barriers around isolated areas of concern such as seagrass beds within the project limits as well as outside the right-of-way limits. The COUNTY will identify such areas. Install the barriers in accordance with the details shown in the plans or as approved by the COUNTY and or ENGINEER.

Ensure that the type barrier used and the deployment and maintenance of the barrier will minimize dispersion of turbid waters from the construction site. The COUNTY may approve alternate methods or materials.

Operate turbidity barriers in such a manner to avoid or minimize the degradation of the water quality of the surrounding waters.

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3. Product: All material shall be new and unused. The turbidity barrier shall be a pervious barrier and the fabric color shall be yellow. Use staked turbidity barriers in water less than one-foot deep. Use floating turbidity barriers in water one-foot or deeper.

PART 3 - EXECUTION

A. Design, construct, and maintain the pollution control and treatment system to minimize erosion and capture and remove pollutants from the construction site and from all other areas disturbed by construction activities.

B. Turbidity curtains shall be removed each day to eliminate the ability for entanglement by manatees, sea turtles or smalltooth sawfish

C. REPAIR ALL EROSION DAMAGE – At no additional cost to the COUNTY and regardless of the state of completion of the Work, immediately clean all dirt and debris from all pipes and drainage structures; and repair all flooding, washouts, and all other erosion damage to the Work. This responsibility shall not end until Final Acceptance of the Work by the COUNTY. Included is damage caused by erosion of any kind (e.g. wind, waves, stormwater runoff, hurricanes, etc.) including Acts of God. Restore all erosion damaged areas to design grades and elevations. Also, refer to General Conditions 6.13.B.

Item of Payment

Payment for the work specified in this item shall be made under:

Bid Item No. 104-1– Silt Fence - Per Linear Foot Bid Item No. 104-2 – Floating Turbidity Barrier – Per Linear Foot

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SECTION 530 - RIPRAP (RUBBLE)

Technical specification 530 – RIPRAP (RUBBLE) is amended to include:

Under Bid Item 530, the CONTRACTOR shall furnish, deliver and place clean rock riprap and filter fabric to the site. Rubble riprap shall consist entirely of broken limestone conforming to the following requirements:

a. The material shall be sound and durable quality stone, and shall have a minimum specific gravity of 2.3 (density of 140 pcf).

b. The faces of individual pieces of stone shall be roughly angular, not rounded, in shape.

c. The least dimension of each stone shall not be less than one-third (1/3) of the greatest dimension of that stone.

d. Stones shall be of a graded mixture, with individual pieces weighing, in general, from 250 pounds to 450 pounds each.

e. At least 97% of the material by weight is smaller than 700 lbs. and at least 50% of the material by weight is greater than 300 lbs. and at least 85% of the material by weight is greater than 80 pounds. The thickness of stones shall not exceed 2.5 ft. (30 inches).

f. A sample of the rip rap material shall be provided to the ENGINEER for approval prior to CONTRACTOR staging on site.

g. A drop test shall be performed per USACE Engineer Manual 1110-2-2301 at the mine or the project site prior to construction and at the COUNTY/ENGINEER’s discretion throughout the project to demonstrate the soundness of the rip rap material.

h. ENGINEER has the option to reject any rip rap material either in the staging area or placed on the breakwater. Proper disposal of any rejected material and costs associated with disposal shall be the responsibility of the CONTRACTOR.

i. Rip rap stone shall be free of loose sediment, rebar, steel, wood, and other construction debris.

j. Site Preparation: The CONTRACTOR is responsible for any site preparation required of the base prior to the installation of the riprap, including but not limited to removing trash, grading, minimal dredging/excavation, leveling, compaction, etc. If the CONTRACTOR encounters soft or unexpected sediments along the base that may cause instability in the placement of the breakwater, the CONTRACTOR shall notify the COUNTY and ENGINEER immediately.

The riprap shall be placed and arranged to form compact layers conforming to the neat lines called for in the Plans, and to the thickness’ specified, plus or minus six (6) inches.

The riprap shall be placed in a manner such that the smaller pieces are evenly distributed and placed so as to fill the voids between the larger pieces, and in a manner to avoid sharp exposed edges. No material may be placed outside the footprint of the structure as shown on the drawings without prior written approval of the ENGINEER.

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Interlocking of Stones: Stones shall be placed in such a manner that they will be properly interlocked with the adjacent stones to resist displacement by wave action and form a uniform and compact section. Each stone shall be firmly set and well-supported by underlying material and adjacent stone with a minimum of four points of contact.

Excessive Material Placement: Material placement from beyond the Project limits as specified on the Contract Drawings shall be considered excessive material for which payment will NOT be made. The CONTRACTOR shall be responsible for all federal, state, and local regulatory permits, implications, violations and/or fees as a result of such work.

Misplaced Project Materials: Any project materials deposited at locations other than as designated or approved by the COUNTY shall be considered misplaced material and shall NOT be paid for until the CONTRACTOR, at their expense, removes and replaces such misplaced material to an approved location. This required removal and replacement of misplaced material and any necessary restoration work shall not be the basis for a time extension or additional compensation under this Contract.

Transport/Delivery: The CONTRACTOR shall transport material to the construction site by truck or barge. No overflow or spill-out of fill shall be permitted during transport to the fill site. All trucks shall be covered in order to prevent spillage. Failure to modify those methods of operation which are resulting in spillage during transport will result in suspension of transport operations and shall require prompt repair or change of operations so as to prevent spillage as a prerequisite to resumption of transport operations.

Measurement and Payment of Fill Quantities: The CONTRACTOR shall load and weigh (before and after loading) the trucks used to transport the material from the pit to the construction site. The trucks shall be weighed empty, loaded with rock material (described in #3 below) and weighed full in a location that is easily accessible and will cause no delay in the transport of the rock material to the construction site. The CONTRACTOR shall have available such equipment as will be necessary to collect the material, store the material, load the transport trucks and weigh the trucks full and empty, without interruption. The scales used for weighing the trucks shall be certified by The Florida Department of Transportation. The CONTRACTOR shall provide a “weight ticket” for each truckload citing the net weight of material in the truck and the date of delivery;

these tickets will be the basis for final payment to the CONTRACTOR under Bid Item 2.

During construction, by 10 a.m. each day, the CONTRACTOR will provide to the COUNTY a daily log including (1) a summary table of all truckloads of material delivered to the site during the prior day including the net weight and the location of delivery (the survey stationing along the shoreline construction, i.e. STA.5+00) for each truckload or barge load, and (2) the total tonnage of material delivered through the prior day. With the CONTRACTOR’s requests for payment under this bid item, the CONTRACTOR shall provide the COUNTY with copies of all yard tickets that shall be the basis of payment.

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Payment for rock material shall be made on the basis of the quantity (tons) of material placed within the limits of the project as measured by the weight tickets for each truckload, as reported by the CONTRACTOR, and as verified by the COUNTY through review of weight tickets and measurements of the material placement area.

Payment for all materials and labor shall be made by the COUNTY to the

CONTRACTOR according to the unit prices indicated on the Bid Schedule for materials actually used in the construction and accepted by the COUNTY and ENGINEER. The COUNTY may increase or decrease quantities prior to materials actually being used by the CONTRACTOR for construction and performance of the work; the unit prices cited on the CONTRACTOR’s Bid Schedule shall remain valid for adjustments in quantities by the COUNTY equivalent to up to 25% of the Total Cost cited on the CONTRACTOR’s Bid Schedule.

Unsuitable Material: All material furnished under this Agreement must comply with these Technical Provisions and any deviation from this specification may result in a material breach of the Agreement. Any material that the CONTRACTOR provides, which does not meet this specification, shall be removed and replaced at the CONTRACTOR’s expense. The material may be collected and tested by the COUNTY periodically throughout the construction project. In the event that unsuitable material is detected as part of these procedures, the CONTRACTOR will immediately stop furnishing such material and shall be responsible for immediately removing the unsuitable material prior to any further construction. Any unsuitable material shall be removed at the expense of the CONTRACTOR in a manner approved by the COUNTY. Burial of material that does not conform to these specifications is prohibited.

A. Payment shall be made under:

Bid Item No. 530-3-3 – RIPRAP (RUBBLE 1.5 ft. median dia. Limestone) – Per Ton

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SECTION 901 – COARSE AGGREGATE – BEDDING STONE (3-6”)

Technical specification 901 – COARSE AGGREGATE – BEDDING STONE (3-6”) is amended to include:

The CONTRACTOR shall furnish and install a Coarse Aggregate - Bedding Stone of either a durable quality limestone or other quarry run stone, with a bulk specific gravity of not less than 1.90 and that is reasonably free from thin, flat and elongated pieces. Ensure that the bedding stone is also reasonably free from organic matter and soft, friable particles. Meet the following gradation limits:

Standard Sieve Sizes Individual Percentage by Weight Passing

6 inches 100 5 inches 50 to 100 3 inches 15 to 50 2 inches 0 to 15

In lieu of limestone or other quarry run stone, the Contractor may substitute non-reinforced, recycled concrete.

Bid Item No. 901– Coarse Aggregate – Bedding Stone (3”-6”) - Per Ton

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SUPPLEMENTAL TECHNICAL SPECIFICATIONS SECTION

SECTION 903 - PRECAST CONCRETE OYSTER DOMES (INSTALLATION)

PART 1 GENERAL

1.1 DESCRIPTION

The work of this section shall include furnishing all labor, supervision, materials, equipment, and incidentals as necessary to handle and install the Precast Concrete Oyster Domes as shown on the project plans and specified herein. The COUNTY has pre-purchased and stockpiled Bay Balls = 2’ x 3’, with footer, approximately 500 lbs.

each, and Pallet Balls = 2.75’ x 4’, with footer, approximately 1,300 lbs. each. The work will include the following:

1. Developing a Lifting and Installation Plan;

2. Loading and transporting the structures from the staging site to the project site;

3. Installation of precast domes as specified on the project plans;

4. Recording of final Precast Concrete Oyster Domes location by survey.

1.2 SUBMITTALS

The following items shall be submitted to the COUNTY’s Representative for review:

1. Lifting and Installation Plan: A lifting and installation plan describing the operations, equipment, and general approach for lifting, transporting, and installing the Precast Concrete Oyster Domes at locations shown on the project plans. The Lifting and Installation Plan shall clearly outline the methods proposed by the Contractor to install the precast domes, to meet all applicable permit conditions and restrictions, and to meet the placement tolerances specified herein.

2. Pre-construction survey noting any environmental conditions of concern that differ from those reflected on the contract drawings.

3. As-built survey and record of the final location and elevation of each Precast Concrete Oyster Dome.

1.3 SCHEDULE AND TIMING REQUIREMENTS

A. Install Precast Concrete Oyster Domes between March 2024 and December 2024.

B. Contractor to plan work schedule based on tides and navigation conditions at the site.

1.4 INSPECTION

A. The Contractor shall stop work and call for inspection at the following points of construction:

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1. After Precast Concrete Oyster Domes are loaded for transport, at the staging site.

2. After pre-construction site layout has taken place.

3. Upon placing the units in each breakwater.

4. Prior to conducting final recording of Precast Concrete Oyster Domes location

1.5 QUALITY CONTROL

A. All operations performed under this specification are subject to inspection and approval by the COUNTY’s Representative. The Contractor shall be wholly responsible for the control of all operations incidental, therefore notwithstanding any inspection or approval that may have been previously given. The COUNTY’s Representative reserves the right to reject any works which are not in accordance with the requirements of this specification.

1.6 EXISTING SUBMERGED AQUATIC VEGETATION (SAV)

A. Submerged Aquatic Vegetation (SAV) are present throughout the work area and within the areas designated for accessing the project site. Contractor’s operations shall not cause any adverse conditions that directly or indirectly impair or damage seagrass beds in the project vicinity. If SAV beds are encountered at the location of the Precast Concrete Oyster Domes as indicated on the plans, the Contractor shall consult the COUNTY’s Representative for direction on relocating the Precast Concrete Oyster Domes before placement.

PART 2 MATERIALS

2.1 MATERIALS SUPPLIED TO THE PROJECT

A. The following materials shall be supplied by the COUNTY in the quantities as shown on the plans:

1. Bay Balls = 2’ x 3’, with footer, approximately 500 lbs.

2. Pallet Balls = 2.75’ x 4’, with footer, approximately 1,300 lbs.

2.2 ASSEMBLY INSPECTION

A. Prior to loading elements onto barges, Contractor shall inspect the Precast Concrete Oyster Domes and verify that the materials supplied to the project are correctly assembled, as shown on the plans, and free of defects or damage. The Contractor is responsible for ensuring the safe transfer of the precast domes to the project site.

B. The Contractor shall document (including capturing visual evidence), identify, and report any defects, damages, or incomplete Precast Concrete Oyster Domes promptly, in writing, to the COUNTY’s Representative.

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C. Additional Precast Concrete Oyster Domes have been supplied to account for a reasonable amount of acceptable damage. Additional Precast Concrete Oyster Domes damaged beyond immediate repair shall be replaced, repaired, or procured at the Contractor's expense.

PART 3 EXECUTION

3.1 GENERAL

A. The Contractor shall coordinate work with the COUNTY Representative. Unless otherwise indicated, the Contractor shall be responsible for the sequence of activities.

3.2 SITE PREPARATION

A. The Contractor shall mark the location of each Precast Concrete Oyster Dome to be installed as shown on drawings using stakes embedded into the bay bottom. Tops of stakes shall be at 5ft NAVD or higher to allow for visual inspection during normal low tides. Contractor shall attach high visibility flagging, 1ft in length minimum, near the top of each stake.

B. The Contractor shall not place Precast Concrete Oyster Domes in locations where the sea bed consists of large rocky material or debris such that the bottom surface of the precast dome cannot rest flush with the bedding stone.

C. Contractor shall allow two (2) working days for COUNTY’s representative to review staked locations and to request adjustments. If approved by the COUNTY’s representative, the contractor may proceed with placing the Precast Concrete Oyster Domes.

3.3 ACCESS TO THE SITE

A. Access to the site shall be from the water only. The work shall take place in shallow water. The Contractor shall review and abide by all applicable permit conditions and restrictions related to minimum tidal elevations and underkeel clearances. The Contractor is responsible for documenting and abiding by all such applicable conditions and restrictions. Incidental foot access from land may be permitted at the COUNTY’s discretion.

3.4 PLACEMENT

A. Upon approval of the COUNTY’s Representative, and in the presence thereof, unless instructed otherwise, the Contractor shall install the precast dome at the locations designated by the stakes. The work shall be conducted in a manner that avoids SAV beds and control areas to the extent practicable. If avoidance with SAV is not practical, the Contractor shall inform the COUNTY’s Representative for review and direction.

B. The Contractor shall place each Precast Concrete Oyster Domes in a manner that minimizes turbidity and erosion. The Contractor shall place material carefully to avoid

01025-20 creating turbidity. The Contractor is responsible for any soil displaced during placement.

C. If Precast Concrete Oyster Domes are placed on pallets by the Contractor to facilitate handling, the Contractor shall not be allowed to leave the pallet in place after placement. If using a lifting strap, Contractor shall retrieve the lifting strap after placement on the seafloor.

D. The Contractor shall place Precast Concrete Oyster Domes as close to horizontal as practicable.

E. Drop Height Requirement: Precast Concrete Oyster Domes are subject to damage from abrupt accelerations, decelerations, and impact with other structures, including the seafloor. Precast Concrete Oyster Domes shall not be dropped to the seafloor.

Precast Concrete Oyster Domes shall be carefully lowered into position, with a zero drop height, to reduce the chance that marine organisms and habitats are damaged, minimize turbidity, and prevent damage to the precast domes.

3.5 INSPECTION AND CORRECTIVE ACTIONS

A. After placement, COUNTY’s Representative shall inspect the placement of the precast domes. Structures that appear not to meet the specified tolerances herein shall be re-positioned by the Contractor at no cost to the COUNTY. As an alternative, Contractor can provide additional survey points confirming that the Precast Concrete Oyster Dome(s) is(are) placed within allowable tolerances.

3.6 TOLERANCES

A. Vertical tolerance: Bottom of Precast Concrete Oyster Domes shall be +/- 0.5 feet.

B. Horizontal tolerance: The base of the Precast Concrete Oyster Domes should be no more than 1-foot from center of the proposed location represented by the approved stake locations.

C. Horizontal Level: The rotation of any precast dome relative to the horizontal plane shall be placed as close to horizontal as practicable.

D. If obstructions are encountered that prevent a Precast Concrete Oyster Dome’s practical and level placement at the specified stake location, the Contractor shall not place the precast dome, notify the COUNTY’s Representative, and wait for the COUNTY’s Representative to approve removal of the obstruction or a new location.

3.7 METHOD OF PAYMENT

All labor, materials, etc. associated with this work are payed under this specification at a unit of Per Each.

Bid Item No. 903 – Precast Concrete Oyster Domes (Installation) - Per Each