24-Attachment F - Supplemental Specifications.docx

STORMWATER DITCH AND SIDE-DRAIN RESTORATION CONTRACT

SUPPLEMENTAL SPECIFICATIONS – FINAL

SECTION 1 – SPECIFICATIONS

1.01 Workmanship and Materials

This Contract shall be constructed in accordance with the following documents, as applicable:

Hillsborough County Public Works Standard Specifications for Construction (October 2023 Edition) FDOT Standard Plans (FY 2026-27) FDOT Standard Specifications for Road and Bridge Construction (FY 2026-27), except as modified herein Hillsborough County Public Utilities Technical Specifications Hillsborough County Public Utilities Technical Manual Hillsborough County Stormwater Technical Manual (2023) Hillsborough County Public Works Utility Accommodation Guide and Rights-of-Way Use Procedures Manual (2023) Tampa Electric Company Standard Electric Service Requirements, latest edition Order of Precedence In the event of a conflict between Contract Documents, the following order of precedence shall apply:

Purchase Order (Work Order) Supplemental Specifications Hillsborough County General Terms and Conditions Hillsborough County Public Works Standard Specifications (Sections 01010–01700) FDOT Standard Specifications (as modified herein) FDOT Standard Plans The COUNTY Project Manager shall resolve conflicts not otherwise addressed.

FDOT Specification Modifications FDOT Standard Specifications Division I (Sections 1–9) and Division II (Sections 100–103 and 105) are omitted in their entirety and replaced by Hillsborough County General Terms and Conditions and Hillsborough County Public Works Standard Specifications Sections 01010 through 01700.

References within the FDOT Specifications to Division I shall be interpreted as references to the corresponding County provisions.

Quality Control and Testing Contractor Quality Control (CQC) program requirements referenced in FDOT Specifications are not required under this Contract. However, the CONTRACTOR remains fully responsible for compliance with all Contract Documents and for ensuring that materials and workmanship meet specification requirements.

All testing required to demonstrate compliance shall be performed at the CONTRACTOR’s expense by an FDOT-qualified testing laboratory approved by the COUNTY.

The COUNTY may perform Quality Assurance (QA) testing for its own benefit. Such testing does not relieve the CONTRACTOR of responsibility for quality control or compliance. The CONTRACTOR shall not rely upon COUNTY testing for acceptance or compliance purposes.

The COUNTY reserves the right to require additional testing when necessary to ensure compliance.

Value Engineering Change Proposal (VECP) At the CONTRACTOR’s option, a Value Engineering Change Proposal (VECP), also known as a Cost Savings Initiative Proposal (CSIP), may be submitted in accordance with FDOT Standard Specifications Section 4-3.9.

The COUNTY reserves the right to reject any VECP/CSIP at its sole discretion. Submission or review of a VECP/CSIP shall not relieve the CONTRACTOR of the obligation to perform the Work in accordance with the existing Contract requirements or schedule.

Terminology The term “Department” in FDOT Specifications shall mean COUNTY unless FDOT is the controlling authority.

The terms Engineer, Project Manager, and Project Representative are interchangeable within the Contract Documents.

Control of Materials Approved FDOT Quality Product List (QPL) products will be accepted unless otherwise noted.

1.02 Project Sign

Project identification sign(s) shall be provided by the COUNTY and placed by the CONTRACTOR at each individual project site associated with a Purchase Order (Work Order), when required by the COUNTY. Each Purchase Order shall be considered a separate project for purposes of project identification signage.

The CONTRACTOR shall install the sign(s) prior to commencement of physical construction activities at the site. The sign(s) shall be maintained in good condition throughout the duration of the applicable Work Order.

Portable sign(s) shall be removed by the CONTRACTOR upon completion of the Work Order at that location. All sign(s) shall be returned to the COUNTY in good condition upon completion of the applicable Purchase Order or at the end of the Contract term, as directed by the COUNTY.

Failure to properly install or maintain required project signage may result in withholding of payment for the applicable Work Order until corrected.

1.03 Schedule

The CONTRACTOR shall submit a project schedule for each individual Purchase Order (Work Order). Each Purchase Order shall be considered a separate project for scheduling purposes.

The schedule shall be submitted to the COUNTY within ten (10) calendar days of issuance of the Notice to Proceed for the applicable Purchase Order, unless otherwise directed. Work shall not commence until the schedule has been submitted and accepted by the COUNTY.

The schedule shall encompass the entire construction duration specified in the applicable Purchase Order and shall not indicate a shorter duration. The schedule shall reflect all phasing, milestone dates, sequencing requirements, and any constraints identified in the Work Order.

The schedule shall include all WORK associated with the Purchase Order, including but not limited to:

Mobilization Material procurement Submittals and review periods Utility coordination or relocation Permit approvals Construction activities Restoration and punch list completion The CONTRACTOR shall update the schedule as required to reflect actual progress and shall submit a recovery schedule if the Work falls behind the established milestone dates.

Bar Chart A bar chart schedule, as described in Section 01310 of the Standard Specifications, shall be required for each Purchase Order issued under this Contract.

CPM

A CPM schedule, as described in Section 01311 of the Standard Specifications, shall not be required under this Contract unless specifically required by the COUNTY in a Purchase Order.

1.04 Special Working Hours

The standard work hours to be considered by Bidders in preparing their bids shall be as follows, unless otherwise specified in the applicable Purchase Order (Work Order):

8:00 AM to 5:00 PM – Low volume roadways such as subdivisions or similar locations.

9:00 AM to 4:00 PM – High volume roadways (collector and arterial roadways), congested areas, or similar locations.

9:00 PM to 6:00 AM – Level of Service “F” roadways, congested areas, or similar locations.

Work shall be performed Monday through Friday, excluding COUNTY-observed holidays and weekends, unless otherwise authorized.

No work shall proceed outside these hours without a minimum of seventy-two (72) hours prior written notice to and authorization by the COUNTY Project Manager.

The COUNTY reserves the right to modify allowable work hours for any Purchase Order based on traffic volumes, congestion, school zones, special events, or other conditions affecting public safety and mobility.

Temporary Traffic Control (TTC) Permit Coordination Temporary Traffic Control (TTC) Permits, when required, will identify allowable working hours within the roadway limits for each Work Order. The CONTRACTOR may request alternative work hours consistent with the TTC Permit conditions. Approval of alternative work hours requires written authorization from the COUNTY Project Manager.

If amended work hours are approved, the CONTRACTOR shall comply with any revised TTC Permit issued by the COUNTY.

Extended Hours and Recovery If the Work is progressing in accordance with the approved schedule, the COUNTY is not obligated to approve extended shifts or additional workdays beyond those stated herein.

If the Work is behind schedule, the COUNTY may require extended shifts, additional workdays, or weekend work upon review and approval of a recovery schedule submitted by the CONTRACTOR. Such measures shall be at no additional cost to the COUNTY unless otherwise directed.

At the discretion of the COUNTY, additional costs incurred by the COUNTY for inspection, administration, or staffing due to extended or unauthorized work hours may be subject to reimbursement by the CONTRACTOR.

Emergency and Urgent Work For emergency or urgent work identified by the COUNTY:

The CONTRACTOR shall confirm receipt of notification within twenty-four (24) hours, including weekends.

The CONTRACTOR shall perform a site visit within forty-eight (48) hours of notification.

A cost estimate shall be submitted within forty-eight (48) hours following the site visit.

The CONTRACTOR may be required to implement immediate safety measures, including temporary traffic control devices, road plates, or other protective actions necessary to maintain public safety.

Failure to comply with emergency response requirements may result in assignment of the Work to another firm, suspension of future Work Orders, termination of the Contract, or a claim against the performance bond.

Routine Work For routine Work Orders, the CONTRACTOR shall commence work as directed by the COUNTY Project Manager and in accordance with the approved schedule.

Failure to respond or commence work as required may result in reassignment of the Work Order, suspension of future Work Orders, termination of the Contract, or a claim against the performance bond.

1.05 Clearing and Grubbing

Clearing and grubbing shall consist of the removal of trees, brush, stumps, roots, and other vegetation or obstructions within defined areas where full-width clearing is necessary to perform the Work.

This item is intended for area-based clearing operations where vegetation removal extends beyond the ditch prism and includes the full cross-section of the ditch, side slopes, and adjacent areas as identified in the applicable Purchase Order (Work Order) or as directed by the COUNTY Project Manager.

Clearing and grubbing under this item shall be used only where substantial vegetation removal is required across a defined area and shall not be used for linear ditch bottom or slope clearing associated with routine reshaping operations.

Work shall be performed in accordance with FDOT Standard Specifications Section 110, as modified herein.

Clearing limits shall be defined in the Purchase Order or by field direction from the COUNTY Project Manager. The CONTRACTOR shall confine clearing activities to the minimum area necessary to complete the Work and shall avoid damage to adjacent improvements not designated for removal.

All cleared materials shall be removed from the site and disposed of in accordance with applicable regulations unless otherwise directed by the COUNTY.

Basis of Payment Clearing and Grubbing shall be measured and paid for by the acre (AC) of area cleared within the limits authorized by the COUNTY.

Measurement shall be based on the actual area cleared and approved by the COUNTY Project Manager.

Payment shall include all labor, equipment, cutting, grubbing, root removal, disposal, restoration of disturbed areas, and all incidental work necessary to complete the clearing within the authorized limits.

No payment shall be made for clearing performed outside the limits identified in the applicable Purchase Order or directed by the COUNTY Project Manager.

Non-Duplication of Vegetation Clearing Pay Items Clearing and Grubbing (AC) and Ditch Clearing of Large Vegetation (LF) are separate and distinct pay items and shall not be used concurrently for the same area of Work.

Clearing and Grubbing (AC) is intended for full-width or area-based clearing operations extending beyond the ditch prism, as defined in the applicable Purchase Order.

Ditch Clearing of Large Vegetation (LF) is intended for linear clearing confined to the ditch prism only.

Under no circumstances shall both items be applied to the same limits of Work unless specifically authorized in writing by the COUNTY Project Manager.

The CONTRACTOR shall not be entitled to double payment for vegetation removal within overlapping limits.

1.06 Maintenance of Traffic

Maintenance of Traffic (MOT) shall be provided only when required to safely manage impacts to vehicle, pedestrian, or bicycle traffic resulting from the Work performed under an individual Purchase Order (Work Order).

The majority of Work under this Contract is anticipated to occur on roadway shoulders or within open ditch areas beyond the edge of travel lanes. Accordingly, MOT shall not be automatically included with every Purchase Order and shall only be implemented where traffic control is necessary, as determined by the COUNTY Project Manager.

When required, MOT shall be performed in accordance with:

FDOT Standard Specifications Section 102 FDOT Standard Plans Applicable Temporary Traffic Control (TTC) Permit conditions Temporary Traffic Control (TTC) permits required for Work under this Contract shall be obtained by the CONTRACTOR. Permit fees will be waived when the Work is performed directly for the COUNTY; however, compliance with permit requirements remains mandatory.

Road closures are prohibited unless specifically authorized in writing by the COUNTY.

Payment for MOT shall be in accordance with the applicable pay items included in the Contract and authorized in the Purchase Order. MOT shall not be presumed or automatically included for Work sufficiently removed from the roadway where traffic control is not required.

1.07 Work Order Authorization

All Work under this Contract shall be authorized exclusively through a written Purchase Order (Work Order) issued by the COUNTY.

No Work shall be performed outside the limits, quantities, or scope defined in the applicable Work Order unless authorized in writing by the COUNTY Project Manager.

The CONTRACTOR shall not be entitled to additional compensation for work performed without prior written authorization.

Field discussions, inspections, or verbal direction shall not constitute authorization to modify the scope or increase compensation unless confirmed in writing by the COUNTY Project Manager.

1.08 Means and Methods

The CONTRACTOR shall be solely responsible for construction means, methods, techniques, sequences, and procedures used to perform the Work.

Unless specifically identified in the applicable Purchase Order, subsurface conditions including groundwater, saturated soils, or utility conflicts shall be considered incidental to the Work.

No additional compensation shall be granted for conditions that could reasonably be anticipated in roadside ditch and side-drain restoration activities.

1.09 Work Order Prioritization

The COUNTY reserves the right to reprioritize, suspend, reassign, or cancel any Purchase Order based on operational needs, funding availability, public safety concerns, or performance considerations.

Failure of the CONTRACTOR to timely respond to or commence authorized Work may result in reassignment of the Work Order to another contractor without additional compensation.

Such reassignment shall not constitute breach of contract by the COUNTY.

SECTION 2 – PROJECT SPECIFIC REQUIREMENTS

2.01 Office Facilities

No field office is required under this Contract.

2.02 Superpave Asphalt Unit of Measure

Pay Item 334-1, Superpave Asphaltic Concrete, shall be used solely for incidental and localized asphalt restoration directly resulting from ditch reshaping, side drain installation, or side drain replacement.

This pay item shall not be used for roadway widening, resurfacing, leveling courses, or other paving work not directly associated with stormwater construction unless specifically authorized in writing by the COUNTY Project Manager.

The unit of measure shall be as designated by the applicable line item.

2.03 Construction Phasing

Construction phasing shall be evaluated and implemented on a Purchase Order (Work Order)–specific basis.

The majority of work under this Contract is anticipated to occur on roadway shoulders or beyond the shoulder with minimal impact to active travel lanes. Phasing and traffic control shall be commensurate with actual impacts associated with each Work Order.

Lane closures, detours, or road closures shall not be permitted unless specifically approved in writing by the COUNTY.

Maintenance of Traffic (MOT) plans are not anticipated for most Work Orders but may be required where traffic impacts are identified. When required, MOT plans shall comply with applicable COUNTY and FDOT standards.

Temporary Traffic Control (TTC) permits shall be obtained when required. Permit fees shall be waived; however, all permit conditions shall be adhered to.

All costs associated with required MOT shall be included in the applicable MOT pay item.

2.04 Residential & Business Owner Coordination

The CONTRACTOR shall coordinate activities with affected residents, homeowner associations, and business owners when performing work adjacent to private property.

Written notice shall be provided at least three (3) weeks in advance when practicable for activities affecting access, driveways, landscaping, irrigation, or similar features.

Unresolved issues shall be elevated to the COUNTY Project Manager.

The CONTRACTOR shall account for school-related traffic patterns and maintain safe conditions in such areas.

2.05 Utility Coordination

The CONTRACTOR shall coordinate its work with utility owners and protect all existing facilities.

Conflicts between proposed Work and existing utilities shall be resolved in coordination with the utility owner and with COUNTY concurrence.

The CONTRACTOR shall be responsible for any damage to utilities resulting from construction activities and shall promptly restore service.

No additional compensation shall be provided for routine coordination or protection of existing utilities unless specifically authorized in the applicable Purchase Order.

2.06 Description of Work

Work under this Contract shall be assigned on a Purchase Order (Work Order)–specific basis and may include localized ditch reshaping, side drain installation, culvert work, minor restoration, and incidental stormwater improvements.

All work shall be limited to the quantities and limits defined in the applicable Purchase Order.

Unless otherwise noted, ditch-related work shall be assumed to occur under wet conditions.

The Work under this Contract is maintenance and restoration in nature. The CONTRACTOR is not responsible for hydraulic redesign, system capacity analysis, or correction of pre-existing design deficiencies unless specifically authorized in writing by the COUNTY.

2.07 Measurement and Payment – Mobilization and MOT

Hillsborough County Public Works Standard Specifications for Construction (October 2023 Edition), Section 101 – Mobilization and Section 102 – Maintenance of Traffic shall apply except as modified herein.

A. Work Order Mobilization (HC 01010-010) Work Order Mobilization shall be paid once per individual Purchase Order (Work Order) and shall include all costs associated with movement of personnel, equipment, and materials to and from the Work Order site(s), field layout and staking (when required), scheduling, coordination, setup activities, and demobilization upon completion of the Work Order.

Multiple locations within a single Work Order shall not constitute multiple mobilizations. Intermittent operations, phased work, temporary suspension, return visits, or sequencing of locations within a Work Order shall not entitle the CONTRACTOR to additional mobilization payment unless specifically authorized in writing by the COUNTY.

B. Maintenance of Traffic – Base Per Work Order (HC 201000-001) Maintenance of Traffic (MOT) – Base Per Work Order shall be paid once per Work Order when traffic control is required, as determined by the COUNTY. This item shall include all standard traffic control components necessary to safely manage impacts to vehicle, pedestrian, or bicycle traffic, including signage, barricades, cones, channelization devices, and routine monitoring and maintenance of such devices.

C. Maintenance of Traffic – Lane Closure (HC 201000-010) Maintenance of Traffic – Lane Closure shall be paid on a per-day basis only when an approved lane closure is required for the Work Order. This item shall include all additional devices and measures necessary to implement and maintain the lane closure, including advance warning signage, arrow boards, additional channelization, and temporary pavement markings when required.

Lane closures shall not be implemented without prior written authorization from the COUNTY.

D. Off-Duty Law Enforcement (HC 201000-020) Off-Duty Law Enforcement shall be paid on an hourly basis when required by permit conditions, safety considerations, or as directed by the COUNTY. Payment shall be limited to actual hours worked and authorized for the specific Work Order.

2.08 Excavation for Structures and Pipe

Excavation for Structures and Pipe shall be performed in accordance with FDOT Specification Section 125.

No additional compensation shall be provided for this WORK or associated WORK unless specifically authorized in the applicable Purchase Order.

Payment for this work shall be strictly in accordance with the bid items identified in the Contract.

2.09 Pipe Culverts and Storm Sewer

Pipe material shall be specified on the construction plans or directed by the COUNTY Project Manager.

Optional material designations provided in the bid items shall be utilized as directed by the COUNTY for project-specific conditions.

2.10 Audio‑Video Survey

When required by the COUNTY, this pay item shall include one complete audiovisual survey per Purchase Order (Work Order).

The survey shall include pre-construction documentation, post-construction documentation, and applicable as-built documentation.

Final payment for each Work Order shall be contingent upon COUNTY acceptance of required audiovisual documentation.

2.11 Non‑Priced Items (NPI)

An allowance for Non-Priced Items (NPI) is included in the Bid Proposal.

NPI work shall be identified and approved within each Purchase Order.

Pricing shall be based on FDOT Construction Cost History data or other negotiated sources as approved by the COUNTY.

2.12 Cost Escalation

Cost escalation may be negotiated upon contract renewal based on ENR indices and applies only to Work Orders issued during the renewed term.

2.13 Ditch Clearing of Large Vegetation

Selective removal of large vegetation within ditch limits shall be performed only where specifically identified in the Purchase Order.

This pay item shall not be applied continuously or as a blanket linear feature.

Work shall conform to FDOT Specification Section 110, as modified for maintenance activities.

2.14 Clean and Reshape Ditch (Spread or Haul)

This item includes localized excavation, reshaping, and restoration of existing ditches to reestablish hydraulic capacity.

Work shall be limited to areas identified in the applicable Purchase Order and shall not be applied continuously along entire ditch segments.

All ditch reshaping shall conform to existing alignment and approximate geometry unless otherwise directed by the COUNTY.

Erosion and sediment control measures necessary to perform ditch reshaping work shall comply with FDOT Specification Section 104 and shall be included in the applicable pay item unless separately listed in the Bid Proposal.

Restoration of ditch geometry does not constitute a warranty of overall system performance beyond the limits and scope of the applicable Purchase Order.

2.15 Blading Paved Shoulder

Mechanical blading and reshaping of paved shoulders up to 36 inches beyond pavement shall be performed only where authorized.

This item is intended for localized shoulder adjustment associated with ditch or side drain work and shall not be used as a blanket maintenance item.

2.16 Incidental – Bypass Pumping System

Bypass pumping shall maintain continuous flow during construction and shall not be used for groundwater dewatering unless specifically authorized.

Payment shall be per day of authorized operation and shall include all labor, equipment, setup, operation, and removal.

The CONTRACTOR shall be solely responsible for any damage, flooding, erosion, or downstream impacts resulting from bypass pumping operations.

2.17 Driveway (Dirt or Grass) Restore

Unpaved driveways disturbed by stormwater work shall be restored with a minimum 6-inch compacted crushed concrete base or approved equivalent.

Payment shall be per square yard and shall include grading, compaction, and all incidental work necessary to restore pre-existing conditions.

2.18 Pre‑Existing Conditions

Work occurs within existing roadside systems containing variable soils, sedimentation, groundwater, and undocumented utilities. Such conditions are inherent and shall not constitute grounds for additional compensation unless expressly authorized in writing by the County.

- END OF SUPPLEMENTAL SPECIFICATIONS -