B08-Attachment001-BOST_Fiber_SOW.docx

United States Department of the Interior

National Park Service Boston National Historic Site 21 2nd Ave Boston, MA 0229

STATEMENT OF WORK

Project: Charlestown Navy Yard Campus Fiber Backbone Replacement

Location: Boston National Historical Park – Charlestown Navy Yard, Boston, MA

ITEM 1 – DESCRIPTION OF WORK

1.1 Background

The Charlestown Navy Yard campus relies on a buried fiber optic backbone network to interconnect operational facilities including administrative buildings, law enforcement facilities, and infrastructure support buildings. The existing fiber optic backbone has reached the end of its useful life and must be replaced to support modern networking requirements including 25‑gigabit backbone connectivity.

Existing fiber runs are installed within underground conduit systems connecting the Marine Barracks telecommunications room to multiple campus buildings. These pathways will be reused wherever possible to minimize disturbance to historic resources and underground utilities.

Due to network performance requirements and extended run distances between buildings, 2 single‑mode fibers will be installed.

Building 109 houses law enforcement operations and requires highly reliable communications connectivity. Redundant backbone connectivity shall be provided using two physically separate conduit pathways consisting of a primary route directly connecting the Marine Barracks telecommunications room to Building 109 and a secondary redundant route connecting the Marine Barracks to Building 5 and then to Building 109. This redundant architecture ensures continuity of operations for law enforcement functions in the event of a fiber or conduit failure along the primary route.

1.2 Work Covered by the Contract Documents

Replace existing inter‑building fiber optic communications cabling by installing new OS2 single‑mode fiber through currently existing underground conduit pathways throughout the Charlestown Navy Yard. Work includes verifying conduit continuity, pulling new fiber cable, terminating and testing all strands to industry standards, and documenting pathways and terminations. No ground disturbance is anticipated; however, if collapsed or failed conduit segments require localized excavation, work will pause and the Contracting Officer will notify NPS archeologists for monitoring prior to any excavation. Only limited, as‑needed conduit repairs will occur, within previously disturbed utility corridors wherever possible.

Each backbone route shall include:

· Two (2) 24‑strand OS2 single‑mode fiber cable.

Cable Construction Requirements (All Backbone Fiber):

A. Cable type shall be outside‑plant (OSP) rated, suitable for installation in underground conduit, with a dielectric design (non‑metallic) unless otherwise required by the manufacturer for rodent protection. Cable shall be gel‑free (dry water‑blocking) with water‑blocking yarns/tapes.

B. Contractor shall provide cable with dielectric strength members and a pulling eye or approved pulling attachment to support installation without damage. Cable shall be factory listed and compliant with ANSI/TIA‑758 and ICEA OSP fiber standards.

C. Cable jacket shall be suitable for wet locations and underground conduit environments. Where any portion transitions to interior spaces, provide UL‑listed ratings appropriate to the installed environment (OFNR/OFNP as applicable) via an approved transition method (e.g., indoor‑rated cable from building entrance to telecom room or listed transition splice enclosure).

D. Minimum bend radius shall not be exceeded at any time. Contractor shall comply with manufacturer requirements and, at a minimum, maintain bend radius not less than 10× cable outside diameter under no‑load conditions and not less than 20× cable outside diameter under pulling load (or stricter manufacturer requirements).

E. Provide pull tape and lubricant compatible with OSP fiber jackets. Maintain pulling tension within manufacturer limits and document maximum pulling tension for each pull.

Fiber shall terminate at existing rack mounted fiber patch panels in each building telecommunications rack. Contractor shall provide service loops in accordance with BICSI TDMM best practices. A minimum 30 feet and maximum 50 feet of service loop slack shall be provided at each building entrance point and within each telecommunications room to allow for future re‑termination, relocation of patch panels, or equipment replacement without requiring new cable installation. Service loops shall be neatly coiled, secured, and protected within approved slack storage brackets, trays, or enclosures.

Period of Performance: 120 calendar days from Notice to Proceed.

ITEM 2 – EXISTING UTILITIES

Contractor shall verify conduit pathways prior to installation by performing pull‑line verification or rodding operations through each conduit segment to confirm continuity and unobstructed pathways. Mandrel testing shall not be performed due to the presence of existing active telecommunications and utility cables within the conduit system.

ITEM 3 – CONTRACTOR USE OF PREMISES

Contractor operations shall comply with National Park Service regulations. Work shall generally occur Monday through Friday between 8:00 AM and 5:00 PM unless otherwise approved by the Contracting Officer.

ITEM 4 – COMMENCEMENT, PROSECUTION, AND COMPLETION

Contractor shall provide a detailed schedule including mobilization, conduit verification, fiber installation, testing, cutover, and project closeout.

ITEM 5 – EXAMINATION OF SITE

Bidders are encouraged to visit the site prior to submitting proposals and shall be responsible for understanding existing conditions.

ITEM 6 – ABBREVIATIONS

Standards referenced include OSHA 29 CFR 1926, ANSI, ASTM, BICSI TDMM installation guidelines, ANSI/TIA‑606‑B labeling and administration standards for telecommunications infrastructure, NFPA 70 (National Electrical Code), TIA‑568 structured cabling standards, and TIA‑758 outside plant telecommunications infrastructure standards.

ITEM 7 – ACCIDENT PREVENTION

Contractor shall provide a site-specific Accident Prevention Plan in accordance with OSHA 29 CFR 1926.

ITEM 8 – PRECONSTRUCTION CONFERENCE

A preconstruction meeting will be held prior to project start.

ITEM 9 – SUBMITTALS

Contractor shall submit:

· Fiber manufacturer cut sheets and product specifications for all proposed OM4 and OS2 fiber cables

· Splice tray and splice enclosure details

· Fiber patch panel manufacturer specifications and patch panel port numbering plan

· Telecommunications labeling schema compliant with ANSI/TIA‑606‑B

· OTDR testing plan including testing methodology, equipment to be used, calibration records, and reporting format

· Fiber cable manufacturer specifications

· Testing equipment certifications

· Project schedule

· Accident Prevention Plan

· Cutover plan

ITEM 10 – TEMPORARY SERVICES

Contractor shall provide temporary sanitation facilities and any required temporary power.

ITEM 11 – PROJECT CLOSEOUT

Contractor shall submit OTDR results, fiber labeling schedules, and as‑built documentation.

PART 3 – EXECUTION

· Phase 1 – Mobilization: Contractor shall mobilize personnel and equipment and coordinate with park staff.

· Phase 2 – Conduit Verification: Contractor shall verify conduit continuity and install pull tape where missing.

· Phase 3 – Cable Installation: Contractor shall install fiber cables using approved pulling techniques and manufacturer specified tension limits. Contractor shall utilize calibrated pull tension monitoring devices or dynamometers during cable installation to ensure manufacturers’ maximum pulling tension limits are not exceeded. The contractor shall continuously monitor pulling tension during each cable installation and maintain written records documenting maximum pulling tension for each conduit segment. Contractor shall also ensure that minimum bend radius requirements are maintained throughout the installation process including at entry points, handholes, pull boxes, and telecommunications rooms. Documentation of installation practices including recorded maximum pulling tension and compliance with minimum bend radius requirements shall be submitted to the COR as part of the installation records to maintain manufacturer warranty compliance.

· Phase 4 – Termination and Splicing: All fiber strands shall be terminated using LC connectors and fusion splicing where necessary.

· Phase 5 – Testing: Tier 2 OTDR testing shall be performed on all strands. Maximum allowable insertion loss per link shall comply with ANSI/TIA‑568 and manufacturer specifications and shall not exceed calculated link loss budgets for each fiber segment including connectors and splices. Testing shall include bidirectional OTDR traces for every fiber strand. All OTDR test results shall be saved in native electronic format (.sor files) and submitted to the COR along with PDF test reports documenting link attenuation, splice loss, and connector performance.

· Phase 6 – Cutover: Contractor shall coordinate network cutover with park IT staff.

· Phase 7 – Documentation: Contractor shall provide digital as‑built deliverables in GIS or CAD format showing conduit routes, fiber backbone pathways, fiber strand assignments, splice locations, building entrance points, and redundant routing paths between facilities. Deliverables shall include georeferenced mapping of installed infrastructure and associated attribute data sufficient for integration into NPS asset management or GIS systems.

Contracting Officer’s Representative

Matt Chaves IT Specialist, COR-I Boston National Historical Park 21 2nd Ave Boston, MA 02129 image1.png image2.png