Heron Street Post Hurricane Nicole Repairs Technical Specifications

Technical Specifications

October 10, 2025

1 General: These Technical Specifications provide details of the proposed construction (Work or Project) as shown on the Drawings titled “Heron Street Post Hurricane Nicole Repairs Volusia County, Florida” by Coastal Technology Corporation (ENGINEER) dated 07/21/2025.

The Owner is Volusia County (COUNTY); the Work consists of furnishing all labor, equipment, and materials as required for:

a) demolition and removal of damaged existing infrastructure - including:

i. wooden boardwalk and beach access stairs,

ii. portion of concrete sidewalk,

iii. trap bags (sand bags) and geotextile tubing within the County Right-of-Way

(ROW), and

iv. signs, trees, and vegetation as necessary for construction access; and

b) construction of replacement infrastructure - including:

i. a concrete sheet pile seawall with sand backfill,

ii. a concrete walkway,

iii. wooden beach access stairs with landing,

iv. dune plantings, and

v. other ancillary site improvements as shown on the Drawings.

The Project Site is primarily located within the Heron Street ROW east of South Atlantic Avenue to the Atlantic Ocean active waterline in Port Orange, Florida (City).

2 Permit Compliance: The CONTRACTOR shall abide by all notes and conditions indicated on:

a) the Drawings,

b) all permits associated with the Work including (i) the Building Permit - to be obtained by the CONTRACTOR from the COUNTY, and (ii) the Florida Department of Environmental Protection (FDEP) obtained by the COUNTY, and

c) the existing U.S. Fish and Wildlife Service Permit (Number: TE811813-12; see Volusia County signed Take Permit) and Habitat Conservation Plan for the Protection of Sea Turtles (see: Volusia HCP August 2022, ADA accessible).

If the CONTRACTOR violates any of these conditions and Work is stopped by the State of Florida or other public entity, then any additional costs incurred by the CONTRACTOR in association with stoppage of the Work shall be paid by the CONTRACTOR and not charged to the COUNTY.

3 Pre-Construction Meeting: Prior to commencement of construction, the CONTRACTOR shall meet on site with the ENGINEER to establish the construction access, staging areas, and pre-construction conditions of the site. Pre-construction conditions of adjacent structures shall be observed and photo documented by the ENGINEER, COUNTY, and CONTRACTOR. The ENGINEER shall check construction staking (by CONTRACTOR) at this meeting.

4 Staking: Prior to initiation of construction, staking of the proposed construction is to be performed by the CONTRACTOR by methods subject to acceptance by the ENGINEER.

Upland reference survey benchmarks are reflected in the site survey by Sliger & Associates, Inc. dated 9/09/2024 (Appendix 1). The CONTRACTOR shall stake the configuration of the key https://www.volusia.org/core/fileparse.php/6127/urlt/TE811813-12SignedPermit2020-508.pdf https://www.volusia.org/core/fileparse.php/6127/urlt/TE811813-12SignedPermit2020-508.pdf https://www.volusia.org/core/fileparse.php/6127/urlt/Volusia_HCP_August_2022_complete-Accessible.pdf

Technical Specifications

October 10, 2025 proposed improvements including the seawall, deadman, walkway, and beach access stairs as shown on the Drawings.

5 Inspection Notification: At least two (2) weeks prior to the start of construction, the CONTRACTOR shall notify the ENGINEER and COUNTY of the expected dates for the start and completion of construction. The CONTRACTOR will notify the ENGINEER as to the time and date of the following events at least three (3) days prior to the event:

• Mobilization onto the site, including preparation of the CONTRACTOR's access and staging areas.

• Demolition and removal of damaged infrastructure.

• Seawall Construction:

o Delivery of sheet piles to site, o Installation of sheet piles, o Completion of forms for concrete plugs, o Pour of concrete plugs, o Chemical grouting, o Installation of filter fabric on landward face of seawall.

o Completion of forms and reinforcement for concrete deadmen, o Pour of concrete and removal of forms for deadmen, o Installation of tie-rods and deadmen, o Installation of helical anchors, o Completion of forms and reinforcement placement for concrete cap, o Pour of concrete cap, and o Removal of forms for cap.

• Placement, compaction, and grading of fill landward of the seawall.

• Excavation, compaction, and preparation of subgrade.

• Concrete Walkway:

o Completion of forms, o Pour of concrete walkway and removal of forms, and o Installation of aluminum guiderail and handrail.

• Beach Access Stairs:

o Installation of posts, o Cutting of posts – as may be accepted by the ENGINEER, o Installation of pile caps, stringers, decking, and guardrail.

• Installation of dune plantings.

• Site Restoration.

• Demobilization.

Failure to comply may be taken as cause for rejection of Work completed.

6 Construction Access: The CONTRACTOR may store materials and equipment within the Available Staging Areas shown on Sheet C1.0 of the Drawings – including (a) on site within the Heron Street ROW east of South Atlantic Avenue, and (b) within the public parking areas along the west edge of South Atlantic Avenue. The CONTRACTOR’s proposed Staging Area is:

• to be identified by the CONTRACTOR at or prior to the pre-construction meeting, and

• subject to acceptance by the COUNTY and ENGINEER at the pre-construction

Technical Specifications

October 10, 2025

7 Public Safety: The CONTRACTOR shall provide a maintenance of traffic (MOT plan) plan for acceptance by the COUNTY and ENGINEER for the Work proposed within vehicular traffic areas. The CONTRACTOR shall coordinate with the COUNTY regarding any required closure of public access. The CONTRACTOR shall be solely and completely responsible for the safety of all persons and property during performance of the Work within the limits of construction and surrounding the CONTRACTOR’s operations. This requirement shall apply continuously and not be limited to the CONTRACTOR’s working hours. The CONTRACTOR shall make all necessary provisions to ensure public safety. This may include the use of construction fencing, signs, and personnel to prevent damage to persons and property. The CONTRACTOR shall promptly notify the COUNTY if site activities beyond their control preclude their safe construction practices. The CONTRACTOR is responsible for meeting all OSHA requirements that might apply to this Work.

The CONTRACTOR will minimize the areas closed to the public. The CONTRACTOR shall provide and maintain barricades, warning signals, and other measures as warranted for public safety. If the CONTRACTOR is not able to keep and maintain the public at a safe distance from construction activity, the CONTRACTOR is to (a) notify the ENGINEER and COUNTY, and (b) request assistance in controlling public access to the active construction site.

8 Prevention, Control, and Abatement of Erosion and Water Pollution: The CONTRACTOR shall furnish all labor, materials, equipment, and services to provide erosion control measures on the Project site and in areas outside the Project site where Work is accomplished in conjunction with the Project so as to prevent pollution of water, detrimental effects to public or private property adjacent to the Project site and damage to work on the Project. Such measures shall comply with the State of Florida Erosion and Sediment Control Designer and Reviewer Manual dated July 2013. Such measures shall comply with the State of Florida Erosion and Sediment Control Designer and Reviewer Manual dated July 2013.

During rain events, stormwater (from adjacent properties) may enter the Project site. During construction, the CONTRACTOR shall install and maintain erosion control measures as necessary to (a) allow for such stormwater to drain from the adjacent properties, and (b) prevent this stormwater from eroding sand fill or violating state water quality standards.

9 Avoidance of Protected Species and Benthic Resources: The CONTRACTOR shall avoid impacts to any state or federally designated threatened or endangered species including sea turtles, manatees, sawfish, and shorebirds during construction activities. In addition, the CONTRACTOR shall perform the Work so as to avoid adverse impacts to ocean waters and associated resources including beach and dune system, or other benthic resources. If any adverse water resource-related impact occurs as a result of construction activities, the CONTRACTOR shall immediately notify the ENGINEER and COUNTY.

10 Impacts to Cultural and Historic Resources: If prehistoric or historic artifacts are encountered at any time within the Project site, all activities involving subsurface disturbance in the vicinity of the artifacts shall cease. The CONTRACTOR shall contact the COUNTY, the ENGINEER, and the Florida Department of State, Division of Historical Resources, Compliance Review Section (DHR), at (850) 245-6333, as well as the appropriate permitting agency office. Project activities shall not resume without verbal or written authorization from the Division of Historical Resources. If unmarked human remains are

Technical Specifications

October 10, 2025 encountered, all Work shall stop immediately and the proper authorities notified in accordance with Section 872.05, F.S.

11 Additional Specifications: Construction shall be consistent with Florida Department of

Transportation “Standard Specifications for Road and Bridge Construction FY 2024-25” (FDOT Specifications) unless specified otherwise in these Technical Specifications or on the Drawings.

12 Concrete: Concrete for the:

• Pre-stressed piles and pre-cast corner piles shall be FDOT Class V with Type II cement for Extremely Aggressive Environments with a minimum 28-day compressive strength (fc’) of 6,500 psi. Concrete shall have a maximum water/cement ratio of 0.37 lbs/lbs, a minimum total cement content of 600 lbs/cubic yard of concrete, a maximum chloride content of 0.40 lbs/cubic yard of concrete, and a maximum target slump of 3 inches or 7 inches for increased slump concrete in accordance with FDOT Specification Section 346-3.1.

• Seawall cap and deadmen shall be FDOT Class IV with Type II cement for Extremely Aggressive environments, with a minimum 28-day compressive strength (fc’) of 5,500 psi. Concrete shall have a maximum water/cement ratio of 0.41 lbs/lbs, a minimum total cement content of 600 lbs/cubic yard of concrete, a maximum chloride content of 0.40 lbs/cubic yard of concrete, and a maximum target slump of 3 inches or 7 inches for increased slump concrete in accordance with FDOT Specification Section 346-3.1.

• Concrete plug shall be FDOT Class IV with Type II cement for Extremely Aggressive environments, with a minimum 28-day compressive strength (fc’) of 5,500 psi.

Concrete shall have a maximum water/cement ratio of 0.41 lbs/lbs, a minimum total cement content of 600 lbs/cubic yard of concrete, and when placed in the forms, shall have a slump of a minimum of three (3) inches and a maximum of seven (7) inches.

• Concrete walkway shall be:

o be FDOT Class I with Type II cement for Slightly Aggressive Environments, with a minimum 28-day compressive strength (fc’) of 3,000 psi. Concrete shall have a maximum water/cement ratio of 0.50 lbs/lbs, a minimum total cement content of 470 lbs/cubic yard of concrete, and a maximum target slump of 3 inches; and o include fiber reinforcement in the form of Fibermesh 300® fibers at a minimum of 1.5 lbs/yd3 of concrete – mixed and installed per the manufacturer’s recommendations

The CONTRACTOR shall submit a concrete mix design for acceptance by ENGINEER.

Concrete materials, placement, finishing, and curing must conform to requirements of Sections 346 of FDOT Specifications. The CONTRACTOR shall provide and place visqueen against grade prior to a concrete pour on grade. The CONTRACTOR shall employ a vibrator as necessary to ensure filling of the forms with concrete - as accepted by the ENGINEER.

The CONTRACTOR shall provide concrete cylinder tests for each concrete pour - as accepted by the ENGINEER. The CONTRACTOR shall provide one set of four cylinders for each 50 cubic yards, or fraction thereof, for each day’s placement of each mix design. Samples shall be in

Technical Specifications

October 10, 2025 accordance with ASTM C172, processing and curing in accordance with ASTM C31, and testing in accordance with ASTM C39. One cylinder shall be tested at three days or seven days, as required by job conditions, and two cylinders shall be tested for one valid test at 28 days. The fourth cylinder is to be cured and held for testing at 42-days, if 28-day test indicates deficient results, or as a spare in case of cylinder damage.

13 Reinforcement: GFRP reinforcement shall be V-ROD 60 GPa fiberglass or near equivalent as accepted by the ENGINEER and COUNTY, and have a minimum cover of 3" or as otherwise shown on the Drawings. All reinforcing steel of the proposed deadmen shall be grade 60 (fy = 60 ksi). All reinforcing shall be placed according to ACI and Florida Building Codes. No laps in reinforcing shall be allowed in pre-cast or pre-stressed members.

14 Vibratory Monitoring: The CONTRACTOR shall provide vibratory monitoring throughout the duration of construction using GeoSonics, Inc. or a new equivalent company as accepted by the ENGINEER. The vibratory monitoring shall measure peak particle velocity, frequency, and air overpressure produced by vibration sources produced by construction activities. The CONTRACTOR shall provide the COUNTY and ENGINEER a weekly summary report prepared by GeoSonics, Inc. The ENGINEER, COUNTY, and CONTRACTOR will receive a text message or email alert notification if vibration levels identified in FDOT Specification Section 108 of

0.5 inches per second are exceeded.

15 Payment: The COUNTY shall make payment to the CONTRACTOR for all materials, labor, and equipment according to the unit prices and lump sum prices indicated on the Bid Schedule. The CONTRACTOR shall submit copies of yard tickets and weight tickets for all materials with Payment Request for unit price based bid items. The COUNTY shall make final payment for the Work upon completion of the Work by the CONTRACTOR and acceptance of the Work by the ENGINEER and the COUNTY. The CONTRACTOR shall provide all materials, labor and equipment needed to perform the Work required by these Specifications and the Drawings for each Bid Item (as described below), with no additional cost to be incurred by the COUNTY.

16 The following describes Bid Items for the Work:

16.1 Mobilization/Demobilization: Mobilization/demobilization consists of the preparatory Work, operations, and mobilizing for beginning work on the Project and demobilizing upon completion of the Work, including, but not limited to, those operations necessary for (a) the movement of personnel, equipment, supplies, materials, and incidentals to and from the Project site, and (b) the establishment of safety equipment and first aid supplies, sanitary and other facilities as required by these specifications, and state and local laws and regulations. All costs connected with the one (1) time mobilization and demobilization of all the CONTRACTOR’S employees and equipment are to be included in the lump sum price indicated on the CONTRACTOR’s bid proposal for Bid Item 1. The CONTRACTOR is to (a) determine if underground or overhead utilities exist at all Work locations, and (b) propose adjustments to Work locations as needed to avoid any damage to existing utilities. The CONTRACTOR must contact Sunshine Utilities (1-800-432-4770) prior to the commencement of construction. A total of 60% of this bid item will be qualified for

Technical Specifications

October 10, 2025 payment upon mobilization including installation of a minimum of 10 feet (shore parallel) of seawall sheet-piles; the balance shall qualify for payment upon completion and COUNTY acceptance of the Work. All other costs associated with performance of the Work (including bonding and insurance requirements, vibratory monitoring, erosion and sediment control, additional signage) and not addressed in other bid items

– shall be included in the CONTRACTOR’s proposal for Bid Item 1.

16.2 Demolition: In general, as shown on the Drawings, Bid Item 2 entails removal and disposal of existing damaged infrastructure – including:

• wooden boardwalk and beach access stairs,

• portion of concrete sidewalk,

• trap bags (sand bags) and geotextile tubing within the County (ROW), and

• signs, trees, and vegetation as needed for construction access.

Demolition shall be conducted by the Contractor in accordance with the following:

• The CONTRACTOR shall remove the existing wood boardwalk and beach access stairs – including any posts or piles.

• The CONTRACTOR shall remove and dispose of the Trap Bags within the limits of the COUNTY’s ROW. The sand within the bags is to remain onsite to be used as fill landward of the seawall or placed under the proposed beach access stairs as may be accepted by the ENGINEER and COUNTY.

• The CONTRACTOR shall cut and remove the section of geotextile tubing lying within the COUNTY’s ROW. The geotextile tubes shall (a) be sewn and patched at the cuts subject to acceptance by the COUNTY and ENGINEER, and (b) remain in place on the adjacent property south of the Project site. The sand within the removed section of tubing is to remain onsite to be used as fill landward of the wall or placed under the proposed beach access stairs as accepted by the COUNTY and ENGINEER.

• The CONTRACTOR shall remove existing trees and vegetation only as necessary to provide construction access and achieve proposed grading as shown on the Drawings or as otherwise accepted by the ENGINEER and

COUNTY.

Existing signs shall be removed and reinstalled as indicated on the Drawings

– with replacement of signs under Site Restoration.

• All removed materials shall be disposed of by the CONTRACTOR in accordance with FDOT Specifications Section 110

All costs connected with demolition, removal and disposal of existing damaged infrastructure are to be included in the lump sum price indicated on the CONTRACTOR’s bid proposal for Bid Item 2.

16.3 Sand Fill & Grading: Under Bid Item 3, the CONTRACTOR shall provide all materials, labor, and equipment needed to provide, place, and grade clean sand fill to achieve finished grades as shown on the Drawings or otherwise as may be accepted by the ENGINEER and COUNTY. All sand fill shall be (a) clean beach compatible sand, (b) free of any clay, silt, organic and debris, and (c) obtained from an upland sand mine –

Technical Specifications

October 10, 2025 subject to acceptance by the ENGINEER and FDEP. The CONTRACTOR shall submit a representative sample (≈20in3±) of the proposed backfill sand to the ENGINEER for acceptance prior to delivery of sand to the site. All sand delivered by the CONTRACTOR shall be equivalent to the sample, or otherwise, the ENGINEER may reject the delivered sand and the CONTRACTOR shall be required to remove the rejected sand at no cost to the COUNTY. The CONTRACTOR shall provide “yard tickets” or “weight tickets” for each truckload of fill delivered to the site – as may be accepted by the ENGINEER – citing the weight of material in the truck, the date of delivery, and the location of where the sand is expected to be placed; these tickets will be the basis for final payment to the CONTRACTOR under Bid Item 3.

The CONTRACTOR shall place the fill in one foot lifts compacted to 95% density (per Section 125 of FDOT Specifications) subject to acceptance by the ENGINEER.

Compaction tests will be required for every lift of placed fill and the CONTRACTOR shall be responsible for providing 3rd party testing and reports to the ENGINEER and COUNTY. Upon completion of all filling operations, the site shall be smooth graded and dressed so as to eliminate any pockets, ridges, and depressions to achieve the finished grades shown on the Drawings.

All costs connected with the placement of all sand fill, compaction, grading, and testing are to be included in the bid price indicated on the CONTRACTOR’s bid proposal for Bid Item 3.

16.4 Seawall: As part of seawall construction, the CONTRACTOR shall provide temporary shoring or other means as necessary to avoid damage to the adjacent properties. All costs for the CONTRACTOR to construct the seawall – as shown on the Drawings – shall be included in the unit cost identified by the CONTRACTOR for Bid Item 4. The southern return wall may be reduced by the COUNTY based upon the existing condition of the beach prior to the pre-construction meeting. Prior to ordering any pre-stressed seawall panels, the COUNTY shall confirm the length of return wall to be constructed by the CONTRACTOR. Seawall construction shall comply with the following:

Sheet-Piles: Prior to fabrication, the CONTRACTOR shall provide shop drawings of all piles for acceptance by the ENGINEER.

The pre-stressed concrete sheet-piles shall be “Conventional” FDOT Pre-Cast Concrete Sheet Piles consistent with FDOT Index 455-400 and pre-tensioned with twelve (12) – 5/8 inch nominal diameter five wire strands (Grade 270 KSI) with an initial pull of 44 kips per strand and with the dimensions as shown on the Drawings.

The pre-cast corner piles shall be “CFRP/GFRP” Pre-Cast Concrete Sheet Piles consistent with FDOT Index 455-440 and fabricated as shown on the Drawings. The northern corner pile shall be installed to provide the minimum size gap as practicable between the existing seawall on the adjacent property and the proposed seawall.

The CONTRACTOR may drive or jet the piles to their full embedment length, as shown on the Drawings. In the event the CONTRACTOR encounters rock during pile

Technical Specifications

October 10, 2025 placement or driving, the CONTRACTOR must excavate to remove rock above elevation -10 ft NAVD as may be accepted by the ENGINEER; otherwise, below -10 ft NAVD, the CONTRACTOR shall drive the piles into the rock using a diesel or drop hammer until refusal. It is expected that full penetration may be achieved via use of a vibratory hammer and/or water/air jetting and standard construction techniques.

Appendix 2 is a “Report of Geotechnical Data” by Bechtol Engineering and Testing, Inc. dated September 27, 2024. Use of a driving hammer to achieve penetration may occur without damaging the piles or adjacent buildings or structures by transference of hammer loads through subsurface materials to the foundations of adjacent buildings and structures. Piles shall achieve their full penetration unless specifically otherwise accepted by the ENGINEER. Sheet piles may not be cut without prior acceptance of the ENGINEER; the CONTRACTOR shall record all sheets cut including the length of the cut and the tip elevation of the sheet.

After piles have achieved their full penetration, the grout pockets (dimension X as shown in Concrete Sheet Pile Details on the Drawings) shall be filled with cementitious grout with a minimum compressive strength of 5,000 psi after 3 days

– as accepted by the ENGINEER.

Unless otherwise specifically accepted by the ENGINEER, individual piles shall be placed within the tolerances cited below:

• within two degrees (2º) of vertical;

• pile head shall be no more than one and one-half inches (1-½”) above, or four inches (4”) below the design elevation as shown on the Drawings;

• within three-eighths inch (3/8”) of adjacent piles as measured parallel to the wetface and as measured between piles.

Pile Cap: The CONTRACTOR shall form and pour the concrete cap as shown on the Drawings. The cap shall be formed in straight segments as indicated on the Drawings – as accepted by the ENGINEER. Laps in horizontal reinforcement in the cap shall be allowed only mid-span between anchors.

Filter Fabric: Filter fabric shall be placed (a) on the dry face of the proposed seawall and the existing adjacent seawall return wall over a minimum of six feet from the seaward face, and (b) continuously from the top of the cap to an elevation of +2.0 ft NAVD or as otherwise may be accepted by the ENGINEER. Such placement may require temporary excavation by the CONTRACTOR – as accepted by the ENGINEER. Filter cloth shall be FDOT D-2 or D-3 “Mirafi 160N” or as equal as accepted by the ENGINEER.

Tie-rods & Deadmen: The CONTRACTOR may substitute helical anchors for the tie-rods & deadmen. The CONTRACTOR shall form and pour the deadmen as shown on the Drawings with the seaward face of deadman against the ground. The CONTRACTOR shall temporarily excavate landward of the seawall to install the tie-rods and deadmen. The excavation shall be the minimum necessary to accurately install the tie-rods and deadmen (“tieback” system) without undermining or

Technical Specifications

October 10, 2025 damaging any existing upland improvements. The CONTRACTOR shall provide temporary shoring and/or bracing as needed for construction. The deadmen are to be located twenty-two feet (22’) clear from the landward dry face of the seawall to the seaward wet face of deadmen as shown on the Drawings. The deadmen shall be connected to the seawall with one and a half inch (1-1/2“) diameter 316 stainless steel tie-rods, 5/8”x4”x4” 316 stainless steel plate within the cap, 5/8”x6”x6” 316 stainless steel plate on the landward face of the deadmen, stainless steel nuts, and stainless steel washers as shown on the Drawings. All tie-rods, nuts, washers and plates shall be grade 316 stainless steel (fy = 30 ksi).

Upon placement of the tieback system, and after a minimum of seven (7) days of the pour of the concrete cap, the CONTRACTOR shall place and grade sand fill (under Bid Item 3) to achieve finished grades. After the CONTRACTOR has constructed and compacted the grades on the seaward side of the deadmen, and no sooner than 7 days after pour of the concrete cap, the CONTRACTOR shall tighten the nut on the landward side of the deadman to a minimum torque of 200 foot-pounds or as otherwise may be accepted by the ENGINEER.

Helical Soil Anchors: Helical soil anchors shall be installed along the landward section of the south return wall as shown on the Drawings in accordance with the Manufacturer’s recommendations, and tested by a qualified foundation/anchorage CONTRACTOR or SUBCONTRACTOR. The CONTRACTOR is responsible for installing soil anchors capable of providing the horizontal lateral (perpendicular to seawall) design support load equivalent to (a) 3,670 pounds per linear foot of wall at a maximum spacing of 5 feet on center, and (b) 18.35 kips per anchor working load and 36.7 kips per anchor ultimate capacity. The CONTRACTOR may vary the bearing plate design, the anchor angle of inclination relative to the horizontal, the anchor length, and helical assembly as necessary to achieve the design load capacity - as accepted by the ENGINEER; however, the anchor must remain within the limits of the COUNTY’s property.

This bid item shall consist of all labor and materials necessary to provide the horizontal lateral design load. CONTRACTOR must perform testing to demonstrate the design capacity of the installed anchors. The CONTRACTOR is required to submit a Registered Professional Engineer's (P.E.) certification of (a) shop drawings, and (b) the tested load capacity and design capacity of the helical soil anchors.

Unless otherwise approved by the ENGINEER, helical soil anchors shall be CHANCE® Helical Tieback Anchors as manufactured by:

CHANCE®, of Hubbell Power Systems Inc.

210 North Allen Street Centralia, MO 65240 Phone: (573) 682-5521 Email: civilconstruction@hubbell.com

Appendix 2 is a “Report of Geotechnical Data” by Bechtol Engineering and Testing, Inc. dated September 27, 2024, which indicates sub-surface conditions.

Technical Specifications

October 10, 2025

All costs for providing and installing the seawall – including sheet-piles, grout pockets, concrete cap, filter fabric, tie-rods, deadmen, and helical anchors as shown on the Drawings - are to be included in the CONTRACTOR’s unit cost per linear foot as measured along the centerline of the proposed cap for Bid Item 4.

16.5 Concrete Plug & Chemical Grout: The CONTRACTOR shall install a concrete plug at the northern limit of the proposed seawall extending from the top of the existing seawall cap to elevation +2.0 ft NAVD. The concrete plug shall be formed and poured between the new sheet piles and the existing seawall. The plug shall be extended to reach ten (10) feet below to the existing grade (expected to be ~ -6.0 ft NAVD), as feasible and accepted by the ENGINEER, by use of a single-component urethane saturation grout (chemical grout). The chemical grout shall be installed at a rate of 1 gallon per vertical foot rate in an 18” grid pattern to ensure no void formation. Concrete materials, placement, finishing, and curing must conform to requirements of Section 346 of FDOT Specifications. The CONTRACTOR shall provide and place visqueen against the grade prior to a concrete pour against grade. The CONTRACTOR shall employ a vibrator as necessary to ensure filling of the forms with concrete - as accepted by the ENGINEER. All costs connected with the concrete plug are to be included in the lump sum price indicated on the CONTRACTOR’s lump sum bid proposal for Bid Item 5.

16.6 Beach Access Stairs & Landing: All costs connected with materials and construction of the new Beach Access Stairs and Landing are to be included in the unit price indicated on the CONTRACTOR’s bid proposal for Bid Item 6. The height of the beach access stairs may be modified based upon the condition of the beach at the time of construction. The CONTRACTOR shall install the lowest three steps below the then existing grade at the time of construction subject to the acceptance of the COUNTY and ENGINEER. The CONTRACTOR shall provide all necessary materials, equipment, and labor to construct the proposed dune overwalk and beach access stairs as shown on the Drawings per the following provisions:

Wood: All wood shall be nominal sizes as shown on the Drawings, dressed sizes shall be as published by the National Design Specifications for Wood Construction, Nominal and Minimum Dressed Sizes of Sawn Lumber. All wood shall be pressure treated in accordance with AWPA Standard U1-17 use category UC5C, Marine Use Southern Waters.

• Wood for 6x6 piles shall be No. 2 grade Southern Yellow Pine and shall be Chromated Copper Arsenate (CCA) treated with a minimum retention of 2.5 pcf.

• Wood for pile caps, cross bracing, and stringers shall be No. 1 grade Southern Yellow Pine and shall be CCA treated with a minimum retention of 0.6 pcf.

• Wood for guardrails and decking shall be No. 1 grade Southern Yellow Pine and shall be Copper Azole (CA) treated with a minimum retention of 0.31 pcf.

Moisture content after treatment shall not exceed 19%. All wood shall be free of knots, boreholes, decay, or any other damage. Each piece of lumber shall be

Technical Specifications

October 10, 2025 identified by the grade and treatment mark of a recognized organization approved by the Southern Pine Inspection Bureau (SPIB) Standard Grading Rules for Southern Pine. All exposed edges and faces of the rails shall be sanded smooth to remove splinters and sharp edges.

Stairs: Stairs shall have 11.75” treads and 5.5” risers – with stair tread nosing as shown on the Drawings - and be consistent with the 2023 Florida Building Code – Building, Eighth Edition Section 1011.

Handrails: The handrails shall comply with the 2023 Florida Building Code Section 1014 and shall be mounted 36 inches (±2”) above stair tread nosing. The handrails shall extend horizontally 12 inches beyond the top riser and continue to slope for the depth of one (1) tread beyond the bottom riser plus 12 inches horizontally and return to post, see handrail detail in the Drawings. Clearance space between handrail and rails shall be no less than 1½ inches. Handrails shall not rotate within their fittings. The handrail shall be Schedule 40 6061-T6 Marine Grade Aluminum Handrail as accepted by the ENGINEER and COUNTY. The CONTRACTOR shall provide a shop drawing for the proposed handrail subject to acceptance by the ENGINEER and COUNTY. The brackets holding the handrail shall be spaced and installed consistent with the manufacturer’s recommendations.

Posts: Wood posts shall be 6x6 No. 2 grade Southern Yellow Pine. Posts shall have grade marks branded into wood, not tagged. All wood posts shall have a minimum embedment of 8’ below existing grade or to elevation 0.0 ft NAVD, whichever is lower as shown on the Drawings.

The CONTRACTOR shall make whatever provisions are necessary to achieve the required embedment of posts – subject to the following:

• Jetting: Jetting of posts will be permitted to final penetration.

• Driving: Posts may be driven to achieve penetration.

• Cutoffs & Surface Treatment: No posts may be cut off by the CONTRACTOR unless otherwise accepted by the ENGINEER. After posts have been installed, if cut off, all cut and bored surfaces shall be treated in accordance with AWPA M4, Section 6.1.

Decking: The decking for the landing and beach access stairs shall be 2x6 (nominal dimensions) pressure treated pine. Each deck panel shall be installed according to the following:

• Mechanically fastened to each stringer using two (2) equally spaced #10 x 2½” stainless steel deck screws,

• The long axis perpendicular to the stringers and bearing upon the stringers,

• Including a 3/8” gap between adjacent boards.

• All cut edges shall be sanded smooth.

Railing: All guardrail caps (top rails) shall be Trex Select® Composite Decking 2” x 8” (nominal dimensions) Square Edge Boards in Pebble Grey. Each guardrail cap shall be installed in accordance with the manufacturer’s Installation Guide –

Technical Specifications

October 10, 2025 including mechanically fastened (i) to the top of each 6”x6” diameter pile using two

(2) equally spaced #10 stainless steel composite deck screws and (ii) to the top guardrail at a maximum of 2 feet on center with one (1) #10 stainless steel composite deck screw. All edges shall be sanded smooth.

Hardware: All nuts, bolts, washers, staples, screws, and temporary fasteners shall be 316 Stainless Steel (SS). Guardrails shall be fastened to each wood pile using one (1) ½” diameter stainless steel hex head bolt with nut and washer. Bolt heads shall be countersunk and on the inside of the boardwalk with nuts and threaded ends on the outside of the boardwalk. Stringers shall be fastened to each pile cap with LTS18SS Simpson Strong Tie Stainless Steel Twist Straps. Straps will be connected using spiral shank stainless steel nails as recommended by the manufacturer – all strap holes must contain a fastener. Stringers may be butt-spliced over the centerline of the posts at the pile caps. Pile caps shall be connected to piles using two (2) equally spaced ½” stainless steel hex head bolts with nuts and 2” washers.

Nails and screws shall be driven flush with wood. All exposed edges of the guardrail cap shall be beveled. All exposed edges and faces of the guardrail cap, guardrails, and deck boards shall be sanded smooth to remove splinters and sharp edges.

Bolts shall be cut to not extend more than 1” past the nut on the outside of posts.

16.7 Concrete Walkway: All costs connected with construction of the new concrete walkway are to be included in the unit price indicated on the CONTRACTOR’s bid proposal for Bid Item 7. The CONTRACTOR shall provide all necessary materials, equipment, and labor to construct the proposed concrete walkway as shown on the Drawings. Concrete walkway must be constructed according to FDOT Design Standards (latest version) Index 310, unless indicated otherwise on the Drawings.

Sections 346, 350, and 522 of FDOT Specifications. Work under this repair element includes compaction, the furnishing and placement of all forms, fibers, concrete, and incidental accessories, and other incidental Work. Quantities for final payment will be

(a) based upon the As-Built Survey to be provided by the CONTRACTOR, and (b) subject to acceptance by the ENGINEER.

16.8 Aluminum Guiderail: Under Unit Price Bid Item 8, the CONTRACTOR shall furnish and construct an Aluminum Guiderail consistent with FDOT Index 515-070 and FDOT Specification Section 515 with (i) the addition of one additional horizontal rail along the lower portion of the guiderail to comply with the Florida Building Code Edge Protection (FBC 1012.10), and (ii) additional horizontal members at 4” spacing or less along the seaward most landing of the concrete walkway to meet the requirements of a “guard” in accordance with FBC Section 1015. The guiderail shall be fastened to the concrete walkway using either the FDOT 4 bolt anchorage or FDOT 2 bolt anchorage detail. The pay quantity for the aluminum guiderail under Bid Item 8 will be the number of linear feet of railing, measured along the centerline of the railing, actually constructed and accepted. Prior to fabrication, the CONTRACTOR shall provide shop drawings for

Technical Specifications

October 10, 2025 acceptance by the ENGINEER. Payment for Bid Item 8 shall be full compensation for all work and materials specified in construction of metal handrail, including posts, fasteners, and any required bending of the handrail panels, and any other materials or work incidental to the construction of the handrail. The handrail shall be comprised of 6061T grade aluminum – consistent with FDOT Standard Index 515-070. Quantities for final payment will be (a) based upon the As-Built Survey to be provided by the CONTRACTOR, and (b) subject to acceptance by the ENGINEER.

16.9 Dune Plantings: The CONTRACTOR shall provide and install native plantings in the Native Dune Planting Area depicted on the Drawings and as described below. The proposed split rail fence shall be installed by the COUNTY prior to installation of plantings. The Native Dune Planting Area shall include all areas on the Project Site denuded of vegetation after completion of other Bid Items. The Native Dune Planting Area shall be comprised of seagrape (Coccoloba uvifera) (3 gallon) spaced at 5 ft on center with the remaining area to be 90% sea oats (Uniola paniculata) and 10% dune sunflower (Helianthus debilis) spaced 18 inches on center. The CONTRACTOR shall be responsible for confirming the number of plantings needed prior to ordering and delivery to the Project site.

The liners shall be no less than 12” tall from the top of the root ball to the tip of the longest leave. Plants not meeting the minimum size requirement will be rejected. The root ball for both grasses species shall be no less than 1” x 1” x 2.5” depth. The plants shall have a fully developed root ball, with white or light beige roots. Brown, black or rotting root balls shall be rejected. Liners shall be multi-stemmed plants (at least 2 stems). The plant material in each liner constitutes one dune grass plant, regardless of the number of viable stems in the liner.

All plants delivered and stored at the Project site shall be protected against desiccation, thermal stress, disease and physical damage. Plants deemed to have been improperly handled, packed, transported, and/or stored may be rejected by the ENGINEER and will be replaced by the CONTRACTOR at no additional costs to the

COUNTY.

The plants shall be installed at the spacings specified in the Drawings. The holes dug shall be no less than 6” deep. In each hole, for each planting unit, a minimum of 8 oz.

of pre-hydrated gel shall be added prior to plant installation so that the root ball, not the stems, is in contact with the gel. A pre-hydrating water gel, such as stockosorb, or equivalent, shall be used for all planting units per gel manufacturer specifications.

Once the gel and plant are installed, the distance from the top of the root ball to the sand surface shall be no less than 1” and no more than 4”.

For each liner, slow-release fertilizer shall be added to the gel prior to installation. A minimum of 2 grams of slow-release fertilizer shall be included with each plant. The slow-release (90-day) pelletized Osmocote, or approved equivalent fertilizer, shall have an N.P.K. ratio of 18.6.12 with trace elements. At the end of each workday, all debris, trays, buckets, etc. must be removed from and around the planting areas.

Technical Specifications

October 10, 2025

The CONTRACTOR will be allowed to water-in (initially irrigate) all newly installed plantings according to a CONTRACTOR prepared and COUNTY approved irrigation schedule. The CONTRACTOR will be responsible for all aspects of the initial irrigation including compliance with all environmental permitting regulations, requirements and conditions, as related to plant installation, irrigation and maintenance activities. The CONTRACTOR will be responsible for the provision of all irrigation water required under this bid. Freshwater (potable only) shall be provided by the CONTRACTOR and applied to the planting zones using a non-scouring spray applicator. The CONTRACTOR shall make all necessary arrangements with the appropriate local agencies if the use of local hydrants in the area is proposed by the CONTRACTOR.

Planting units that do not survive for a minimum of 30 days after installation will be rejected and shall be replaced by the CONTRACTOR within 5 days of notification by the ENGINEER. The replacement plantings will be considered eligible for payment only after they have survived a minimum of 30 days from installation. This survival criterion may be waived, at the discretion of the ENGINEER, in areas where it can be documented that plant survival has been adversely affected by wind erosion or overwash. Approximately 180 days following completion of the installation, a minimum survival rate of 80% of all plantings installed shall be met. The CONTRACTOR shall replant non-conforming plantings with viable (and within specifications) plantings of the same type in all areas considered to be deficient according to the planting success criteria. The replanting of planting units will be the sole responsibility of the CONTRACTOR and will be completed at no additional cost to the COUNTY. All original warranty and survival provisions and requirements shall apply to replanted units.

All costs connected with the installation of native sea oat plantings are to be included in the unit price indicated on the CONTRACTOR’s bid proposal for Bid Items 9a, 9b, and 9c. Quantities for final payment will be (a) based upon the nursery yard tickets to be provided by the CONTRACTOR, and (b) subject to acceptance by the ENGINEER.

16.10 As-Built Survey: CONTRACTOR shall provide a final “as-built” Drawings certified by a

Professional Land Surveyor licensed in the State of Florida in AutoCAD and PDF format.

The “as-built” plans shall include field measurements, after construction, of actual as-constructed features and their surroundings, locations, and dimensions, and elevations with information noted on copies of contract drawings. All costs connected with as-built survey shall be included in the lump sum price indicated on the CONTRACTOR’s bid proposal for Bid Item 10.

16.11 Site Restoration: The CONTRACTOR shall restore the site to a pre-construction condition or better as may be accepted by the COUNTY and ENGINEER. The CONTRACTOR shall also restore all pavement, signage, sidewalks, landscaping, and other areas disturbed by the CONTRACTOR as a result of construction activities. All costs connected with site restoration shall be included in the lump sum price indicated on the CONTRACTOR’s bid proposal for Bid Item 11.

Egret Avenue Post Hurricane Nicole Repairs

Technical Specifications or Project) as shown on the Drawings titled “Egret Avenue Post Hurricane Nicole Repairs Volusia County, Florida” by Coastal Technology Corporation (ENGINEER) dated 07/21/2025.

The Owner is Volusia County (COUNTY); the Work consists of furnishing all labor, equipment, and materials as required for:

a) demolition and removal of damaged existing infrastructure - including:

i. wooden boardwalk and beach access stairs,

ii. portion of concrete sidewalk,

iii. trap bags (sand bags) within the County Right-of-Way (ROW), and

iv. signs, trees, and vegetation as necessary for construction access; and

b) construction of replacement infrastructure - including:

i. a concrete sheet pile seawall with sand backfill,

ii. a concrete walkway,

iii. wooden beach access stairs with landing,

iv. dune plantings, and

v. other ancillary site improvements as shown on the Drawings.

The Project Site is primarily located within the Egret Avenue ROW east of South Atlantic Avenue to the Atlantic Ocean active waterline in Port Orange, Florida (City).

a) the Drawings,

b) all permits associated with the Work including (i) the Building Permit - to be obtained by the CONTRACTOR from the COUNTY, and (ii) the Florida Department of Environmental Protection (FDEP) obtained by the COUNTY, and

c) the existing U.S. Fish and Wildlife Service Permit (Number: TE811813-12; see Volusia County signed Take Permit) and Habitat Conservation Plan for the Protection of Sea Turtles (see: Volusia HCP August 2022, ADA accessible).

If the CONTRACTOR violates any of these conditions and Work is stopped by the State of Florida or other public entity, then any additional costs incurred by the CONTRACTOR in and pre-construction conditions of the site. Pre-construction conditions of adjacent structures shall be observed and photo documented by the ENGINEER, COUNTY, and

Upland reference survey benchmarks are reflected in the site survey by Sliger & Associates, Inc. dated 9/09/2024 (Appendix 1). The CONTRACTOR shall stake the configuration of the key proposed improvements including the seawall, deadmen, walkway, and beach access stairs as shown on the Drawings.

https://www.volusia.org/core/fileparse.php/6127/urlt/TE811813-12SignedPermit2020-508.pdf

Technical Specifications

October 10, 2025

5 Inspection Notification: At least two (2) weeks prior to the start of construction, the CONTRACTOR shall notify the ENGINEER and COUNTY of the expected dates for the start and completion of construction. The CONTRACTOR will notify the ENGINEER as to the time and date of the following events at least three (3) days prior to the event:

• Mobilization onto the site, including preparation of the CONTRACTOR's access and staging areas.

• Demolition and removal of damaged infrastructure.

• Seawall Construction:

o Delivery of sheet piles to site, o Installation of sheet piles, o Completion of forms for concrete plugs, o Pour of concrete plugs, o Chemical grouting, o Installation of filter fabric on landward face of seawall.

o Completion of forms and reinforcement for concrete deadmen, o Pour of concrete and removal of forms for deadmen, o Installation of tie-rods and deadmen, o Completion of forms and reinforcement placement for concrete cap, o Pour of concrete cap, and o Removal of forms for cap.

• Placement, compaction, and grading of fill landward of the seawall.

• Excavation, compaction, and preparation of subgrade.

• Concrete Walkway:

o Completion of forms, o Pour of concrete walkway and removal of forms, and o Installation of aluminum guiderail and handrail.

• Beach Access Stairs:

o Installation of posts, o Cutting of posts – as may be accepted by the ENGINEER, o Installation of pile caps, stringers, decking, and railing.

• Installation of dune plantings.

• Site Restoration.

the Egret Avenue ROW east of South Atlantic Avenue, and (b) within the public parking areas along the west edge of South Atlantic Avenue. The CONTRACTOR’s proposed Staging Area is:

• to be identified by the CONTRACTOR at or prior to the pre-construction meeting, and

• subject to acceptance by the COUNTY and ENGINEER at the pre-construction

7 Public Safety: The CONTRACTOR shall provide a maintenance of traffic (MOT plan) plan for acceptance by the COUNTY and ENGINEER for the Work proposed within vehicular traffic areas. The CONTRACTOR shall coordinate with the COUNTY regarding any required closure

Technical Specifications

October 10, 2025 of public access. The CONTRACTOR shall be solely and completely responsible for the safety of all persons and property during performance of the Work within the limits of construction and surrounding the CONTRACTOR’s operations. This requirement shall apply continuously and not be limited to the CONTRACTOR’s working hours. The CONTRACTOR shall make all necessary provisions to ensure public safety. This may include the use of construction fencing, signs, and personnel to prevent damage to persons and property. The CONTRACTOR shall promptly notify the COUNTY if site activities beyond their control preclude their safe construction practices. The CONTRACTOR is responsible for meeting all OSHA requirements that might apply to this Work.

The CONTRACTOR will minimize the areas closed to the public. The CONTRACTOR shall provide and maintain barricades, warning signals, and other measures as warranted for public safety. If the CONTRACTOR is not able to keep and maintain the public at a safe distance from construction activity, the CONTRACTOR is to (a) notify the ENGINEER and measures on the Project site and in areas outside the Project site where Work is accomplished in conjunction with the Project so as to prevent pollution of water, detrimental effects to public or private property adjacent to the Project site and damage to work on the Project. Such measures shall comply with the State of Florida Erosion and Sediment Control Designer and Reviewer Manual dated July 2013. During rain events, stormwater (from adjacent properties) may enter the Project site. During construction, the CONTRACTOR shall install and maintain erosion control measures as necessary to (a) allow for such stormwater to drain from the adjacent properties, and (b) prevent this stormwater from eroding sand fill or violating state water quality standards.

turtles, manatees, sawfish, and shorebirds during construction activities. In addition, the CONTRACTOR shall perform the Work so as to avoid adverse impacts to ocean…