A04_Attachment_01_SOW_-_new_tower_at_Lower_Suwannee_.doc

Statement of Work

Installation of new 150’ Self-Supporting Radio Communications Tower, Outdoor Cabinet, and Radio Infrastructure Equipment Reinstallation for

U.S. Fish & Wildlife Service

Lower Suwannee National Wildlife Refuge 16450 NW 31 Place

Chiefland, FL 32626

Main: (352) 493-0238 Site Contact:

Victor Doig, Fire Management Officer

Cell: 352-493-3155 victor_doig@fws.gov Engineering Contacts:

Terry Kidd, Radio Lead, Email: terry_kidd@fws.gov

Brian Rago, Radio Systems Engineer, Email: brian_rago@fws.gov

Mike Gorman, Site Inspector, Email: michael_gorman@fws.gov

May 3, 2021 This Statement of Work (SOW) document describes the desired installation services, materials, and tasks for this project.

LOCATION:

This project is located in Florida, a refuge of the U.S. Fish and Wildlife Service (USFWS). Below are the coordinates for the new self-supporting tower.

Latitude: 29-22-23.93N – Longitude: 83-02-36.85W

The new tower location is indicated by the red dot

OVERVIEW

The following is an overview of this project. Details relating to each part are described in the “Project Details” section of this document:

At the Lower Suwannee HQ Site:

150’ Self-Supporting Radio Communications Tower

· Contractor shall install one new 150’ self-supporting tower per the customer’s requirements.

· Contractor shall perform a geotechnical investigation study of the proposed tower location and issue a report prior to the design of the tower foundation. A copy of the report shall be submitted to the customer.

· Construction of the new tower shall include all design and engineering of the tower and foundation, materials, fabrication, transportation costs, and installation (labor and mobilization of crew)

· The tower and foundation design shall be designed and stamped by a professional engineer licensed in the state of Florida.

Pedestal Enclosure (Outdoor Cabinet)

· The Contractor shall furnish all necessary materials and construct a 5ft. x 8ft. x 1ft. concrete pad, with two GRC conduits built into the pad and routed to a buried handhold enclosure next to the pad. The Contractor shall install the government furnished pedestal enclosure cabinet on the newly installed pad. See Diagram 1.

· The Contractor shall furnished all necessary materials and using methods in accordance with Motorola R56 to ground the newly installed outdoor cabinet.

Diagram 1

Site Grounding

· All site components (exterior and interior) shall be properly bonded to a common buried grounding grid around the tower and cabinet’s concrete pad in accordance with Motorola R56 guidelines.

Waveguide Bridge Kit

· Contractor shall furnish and install a 10ft. waveguide/ice bridge kit (including three hanger trapeze) to support and protect the transmission lines routed from the tower’s vertical waveguide ladder to the entrance panel of the outdoor cabinet.

Radio Antenna Installation

· Contractor shall re-install five existing antennas (one VHF vertical 4-element folded dipole antenna and four VHF Yagi antennas) on the new tower per the customer’s requirements. These five antennas are currently located on the existing 80ft. tower. The old 80ft. tower is not safe to climb, therefore a boom lift will be needed to remove the existing antennas.

Transmission Line Installation

· Contractor shall furnish and install one run of new 7/8” coax transmission line, and four runs of ½” coax transmission lines along with associated attachment hardware and grounding components on the new tower per the customer’s requirements.

Radio Infrastructure Equipment Installation

· Contractor shall uninstall, relocate, reinstall, and verify the operation of one existing pre-configured government furnished conventional P25 digital radio repeater.

· Contractor shall uninstall, relocate, reinstall, and verify the operation of one existing government furnished duplexer (VHF).

Removal of Existing 80’ Guyed Tower

· Contractor shall dismantle and remove the existing 80ft. guyed tower from the site. A boom lift will be needed to disassemble the existing tower.

· The cost for dismantling and removal of the tower shall be a separate line item so it can be deducted from the cost proposal if the government so desires.

PROJECT DETAILS

General:

All work shall comply with the following standards:

MOTOROLA R56, STANDARDS AND GUIDELINES FOR COMMUNICATION SITES, 2017

TIA-222-H STRUCTURAL STANDARD FOR ANTENNA SUPPORTING STRUCTURES, ANTENNAS AND SMALL WIND TURBINE SUPPORT STRUCTURES, 2017, including all addenda latest editions, by the Telecommunications Industry Association

INTERNATIONAL BUILDING CODE (IBC) 2021, by the International Code Council

ACI 301-10 SPECIFICATIONS FOR STRUCTURAL CONCRETE, by the American Concrete Institute

Tower, Self-Supporting Contractor shall furnish and install one new tower per the following requirements:

· Type – The tower shall be a 150’ tall self-supporting type (SST). This means no guy wires or other supports shall be used other than the legs themselves which shall be fastened to the tower foundation.

· The tower design shall be a three-legged triangular shaped tower.

· Foundation – Contractor shall perform, at their expense, a geotechnical subsurface exploration, investigation, testing, and analysis as their Designer of Record deems necessary for the design and construction of the foundation system.

· Contractor shall issue a written report based upon field and laboratory testing accomplished by the Contractor’s Geotechnical Engineer prior to the design of the tower foundation.

· The Geotechnical Report shall include all the requirements listed in Annex G of TIA-222-H and Motorola R56.

· Design – The tower shall conform to seismic/wind/ice loading requirements as per TIA-222-H Standard for the site location (Levy County, FL).

· The tower will be used for public safety communications, so it shall meet Risk Category II.

· The Environmental Loads, Exposure Category, and Topographic Category for the tower shall be determined by the Contractor’s tower design engineer based on the tower’s location and surrounding terrain.

· The structural steel used for the tower must conform to one of the prequalified steel standards listed in TIA-222-H. All welding must be done by certified welders in accordance with AWS D1.1-10 Structural Welding Code-Steel. The entire tower and all components, including hardware, must be hot-dipped galvanized in accordance with the latest ASTM and TIA-222-H specifications.

· The tower shall be designed and built with one climbing facility in accordance with TIA-222-H.

· The tower shall be equipped with a vertical waveguide ladder on the face that is closest to the outdoor cabinet. The waveguide ladder must have the capacity to accept a minimum of nine (9) runs of transmission line held in place with industry standard ¾” dia. hole stainless steel snap-in coax hangers.

· The tower shall be grounded per Motorola R56, but not less than the requirements in TIA-222-H. The installation of a tower ground ring in accordance with Motorola R56 shall be required. The tower’s ground ring shall be bonded to the communications cabinet’s ground ring per Motorola R56. All materials and connections used for the ground system must be in accordance with Motorola R56.

· The tower legs will have grounding tabs welded at the bottom of the tower legs for the grounding wires to be exothermically welded to them. This way the tabs will be galvanized with the legs.

Loading – The tower shall be designed to include both current and future antennas and tower mounted equipment. The tower shall be designed for the following:

1.

Qty 1 - CommScope VHLPX4-11W-6-QD/A – base of antenna at 126ft. –

Cable Dia. 0.39mm Shielded / armored category 6 PE Jacket

2.

Qty 1 - CommScope VHLPX4-11W-6-QD/A – base of antenna at 150ft. –

Cable Dia. 0.39mm Shielded / armored category 6 PE Jacket

3.

Qty 1 - CommScope VHLPX4-11W-6-QD/A – base of antenna at 130ft. –

Cable Dia. 0.39mm Shielded / armored category 6 PE Jacket

4.

Qty 1 – CommScope DB224 vertical 4-element exposed dipole – base of antenna at 150ft. – Cable Dia. 28mm LDF5-50A Heliax 7/8" PE Jacket

5.

Qty 1 – CommScope DB224 vertical 4-element exposed dipole – base of antenna at 125ft. – Cable Dia. 28mm LDF5-50A Heliax 7/8" PE Jacket 6.

Qty 1 - Comprod 480-70 UHF Yagi – antenna at 147ft. – Cable Dia.

28mm LDF5-50A Heliax 7/8" PE Jacket

7.

Qty 2 - Laird PLC-1669 Heavy duty VHF Yagi – antenna at 90ft, Cable Dia. 16mm LDF4-50A Heliax 1/2" PE Jacket

8.

Qty 2 - Laird PLC-1669 Heavy duty VHF Yagi – antenna at 80ft, Cable Dia. 16mm LDF4-50A Heliax 1/2" PE Jacket

Lighting – The Contractor shall investigate and determine if the tower requires lighting in accordance with the Federal Aviation Authority (FAA) and/or local aviation authority requirements. If it is determined the tower requires lighting, the Contractor shall submit a written document to the customer stating the FAA’s lighting requirement determination.

Pedestal Enclosure (Outdoor Cabinet) The government (Lower Suwanee National Wildlife Refuge) shall furnish one environmentally controlled outdoor rated pedestal cabinet enclosure (78” H x 30” W x 36” D).

Concrete Foundation Pad – The Contractor shall furnish and install all the materials required to build a 5 ft. x 8 ft. x 1 ft. concrete rebar reinforced pad per the cabinet’s manufacturer foundation requirements.

· The foundation pad layout shall include two runs of 2” GRC rigid conduit, 90 degree elbows, and attached to a 2ft. x 2ft. x 2ft. handhold enclosure. The handhold vault enclosure shall be buried next to the concrete pad per Diagram 2 & 3.

Diagram 2

Diagram 3 Utility Connection – The government will contact the local utility company and make the necessary arrangements for the power connection to the new outdoor cabinet’s handhold vault.

Cabinet Placement – The Contractor shall be responsible for all costs and logistics associated with setting the prefabricated outdoor cabinet.

· The cabinet shall only be lifted by the points specified by the cabinet manufacturer.

· The cabinet shall be secured to the concrete pad using Contractor furnished fasteners/hardware per the cabinet manufacturer’s specifications. See Diagram 4.

Diagram 4

Diagram 5 Entire Site Layout Drawing – The Contractor shall create and submit a drawing(s) showing the proposed site layout to the customer for their review and approval.

· No work shall occur at the site prior to receiving the customer’s approval of the proposed layout.

· The drawing shall show the proposed placement of the new site components (tower, outdoor cabinet with concrete pad, and waveguide bridge) in relation to each other and any existing assets.

· The drawing shall show distance measurements and the proposed paths of any interconnecting electrical utilities. This is to include both overhead and buried interconnections.

Site Grounding

The entire communications site and all the assets (exterior and interior) installed within the site compound perimeter shall be grounded using contractor furnished materials and using methods in accordance with Motorola R56.

Note: All below grade connections shall be joined using exothermic welding or listed irreversible high-compression fittings. Do not apply any type of exothermic connection directly to a tower leg. Any exothermic connection applied to a tower shall only be made to a designated grounding tab installed by the tower manufacturer. All exposed #2 solid tinned ground wire shall be protected with ½” liquidtight flexible conduit.

Waveguide Bridge

The Contractor shall furnish and install one 10ft. waveguide bridge kit required to support and protect the transmission lines routed from the tower’s vertical waveguide ladder to the entrance panel of the outdoor cabinet.

Type - The self-supporting safety grated waveguide bridge kit shall be 12” wide, with two direct burial posts and three triple tee trapezes (Commscope model WB-K110-B or approved equal).

· Hot-dipped galvanized steel.

· Trapeze shall accept ¾” stainless steel snap-in coax hangers.

· Trapeze shall support a minimum of 12 cable runs.

· Caps for the posts.

Installation –

· The Contractor shall install each waveguide bridge support post in a concrete caisson. The minimum diameter of the concrete caisson shall equal the pipe diameter plus 6”.

· The waveguide bridge shall be completely self-supporting and not mechanically fastened to the tower or shelter.

· There shall be a separation of 6” between the tower and bridge and 6” between bridge and shelter.

· If multiple bridge kits are required to provide the necessary length to support the cable runs from the tower to the shelter, the bridge kits shall be installed end-to-end and fastened together using splice plates (Commscope model WS-K400 or approved equal).

· The waveguide bridge kit(s) shall be bonded to the site grounding electrode system in accordance with Motorola R56.

· The waveguide bridge’s safety grate panel shall be bonded to the support posts.

Radio Infrastructure Equipment Installation

Contractor shall install the infrastructure equipment and materials per the following requirements:

Note: The Contractor shall furnish all materials that are not specifically designated as government furnish.

Antenna Installation – The Contractor shall re-install five existing government furnished antennas on the new tower. These five antennas are currently located on the existing 80 ft. tower and shall be relocated to the new tower.

Ant

base Level center line Level tip Associated

Cable Mount

Type Installation

· The antenna types and associated mounting levels are listed in the table above.

· For antenna #1 (Commscope DB224-C, VHF exposed dipole vertical), the Contractor shall remove it from the old tower, and re-install it on the new tower using two (2) side-mount standoffs. The antenna shall be mounted on the southeast leg of the tower. All components of the standoff kits shall be installed so the antenna is supported at the base and at the tip. The elements of the antenna shall be set for an omni pattern.

· The Yagi antennas need to be mounted so they are horizontally polarized. The four existing antennas shall be removed from the old tower, and re-installed on the new tower reusing their existing mounts unless the Contractor has a different option for a sturdier mounting method. The Yagi’s shall be mounted with an azimuth as indicated in the table (see above), unless otherwise directed by the refuge.

Transmission Line Installation – 1). The Contractor shall furnish and install one (1) run of new 7/8” Heliax type coax cable (Commscope AVA5-50 / AVA5-50FX or approved equal) from the DB224-C exposed dipole vertical antenna, down the tower, and into the pedestal enclosure (outdoor cabinet). The cable shall be terminated with a N/Male connector after it enters the cabinet. A coaxial lighting suppressor shall be attached and grounded to the master/ primary bussbar at the base of the cabinet using #6 stranded insulated ground wire.

2). The Contractor shall furnish and install four (4) runs of LDF4-50A ½” Heliax cable for the four Laird PLC-1669 Heavy Duty Yagi antennas. All four cables shall be terminated with Male/N connectors after they enter the cabinet. A coaxial lighting suppressor shall be attached to each cable and grounded to the master/ primary bussbar at the base of the cabinet using #6 stranded insulated ground wire.

· All the cables shall be fastened to the tower’s vertical waveguide ladder and waveguide bridge using Contractor furnished new stainless steel snap-in hangers.

· For the DB224-C antenna and 7/8” Heliax cable run, the Contractor shall furnish and install an appropriate new coax connector (CommScope A5NF-S / A5NM-S or approved equal) on the antenna and equipment ends of the cable run. The cable shall be routed into the cabinet via the entry port panel.

· For the Yagi antennas and four ½” coax cable runs, the Contractor shall furnish and install an appropriate new coax connector (CommScope L4TNF-PSA / L4TNM-PSA or approved equal) on the antenna and equipment ends of the cable runs. The cables shall be routed into the cabinet via the entry port panel.

· The Contractor shall furnish and install two 4” diameter boot/cushion assemblies. The first 4” boot assembly shall be equipped with a 1-hole cushion sized for 7/8” Heliax cable, and the second assembly shall be equipped with a 4-hole cushion sized for four ½” Heliax cables.

· The Contractor shall furnish and install five (5) appropriate length jumper cables constructed of ½” Superflex Heliax type coax cable (Commscope FSJ4-50B or approved equal) and matching new connectors.

· All exterior transmission line connectors shall be weatherproofed with butyl wrap/tape.

· Three grounding kits shall be Contractor furnished and installed on each of the coax runs. One near the base of the antenna (grounded to the vertical tower leg with a bronze ground clamp, e.g., Harger CPC1.5/2), the second at the vertical to horizontal transition (grounded to the tower mounted ground bar), and the third at the cabinet’s entry port panel (grounded to the cabinet’s external ground bar below the panel) per Motorola R56.

· All Contractor furnished hardware used to fasten ground conductor lugs to ground bars shall be made of stainless steel.

· A bulkhead type coaxial protector (Polyphaser model IS-B50LN-C2 or approved equal) shall be Contractor furnished and installed inline on each of the coax runs near the interior side of the cabinet’s entrance panel. Each coaxial protector shall be properly connected to the Master/Primary interior ground bar using #6 stranded green insulated wire as per Motorola R56.

Radio Equipment Installation – The Contractor shall use qualified personnel to install the government furnished radio (repeater) in the outdoor cabinet.

· The government furnished Motorola Quantar radio is pre-programmed and configured and the Contractor shall relocate it from the maintenance shop location over to the new pedestal enclosure cabinet. The Quantar repeater operates in the VHF band (136 to174 MHz range).

· The government furnished VHF duplexer is pre-tuned to the desired operating frequencies. The Contractor shall relocate it from the maintenance shop location over to the new pedestal enclosure. The duplexer shall be installed near the top of the cabinet with the Quantar mounted below it. No equipment shall be installed within 16” of the floor.

· Any appropriate length jumper cables needed shall be constructed of ½” Superflex Heliax type coax cable (Commscope FSJ4-50B or approved equal) and matching new connectors.

Performance Testing - The Contractor shall possess the necessary RF test equipment to verify the proper operation of the radio system and provide a written document with the findings, measurements, and observations:

· [Pass/Fail] Sweep each of the newly installed coax cables and verify there is no excessive return loss measurements. If any abnormal measurements are observed, investigate and take the necessary steps to correct the issue.

· Measured forward and reflected power of the repeater into its antenna system.

· Measured transmit frequency error.

· [Pass/Fail] Verify good receiver sensitivity (VHF: better than -119 dBm).

· [Pass/Fail] Verify there is no excessive insertion loss (greater than 2 dB) associated with the duplexer.

· [Pass/Fail] Verify there is no repeater receiver desense.

· [Pass/Fail] Verify that subscriber radios (programmed with frequencies for this repeater) are able to communicate with each other through the repeater.

Radio System Cut-Over “System Cut-Over” describes the actions associated with the period of time from when the old existing repeater is turned off and the new radio equipment is turned on and made operational. Since this radio system is used for public safety operations, the time allowed for the System Cut-Over process has to be as short as possible.

· The refuge shall not be without a fully operational radio system for more than a 48 hour period.

· The Contractor shall create and submit a detailed System Cut-Over plan to USFWS personnel two (2) weeks prior to the event for approval.

Removal of Existing 80’ Guyed Tower Separate Line Item Cost - The cost for dismantling and removal of the tower shall be a separate line item which can be deducted from the price proposal if the government so desires.

Tower Demolition – The Contractor shall dismantle and remove the existing 80’ guyed tower from the site.

· Because of the proximity of the existing tower to the building, plus with the tower being unsafe to climb, a boom lift will be needed to dismantle the tower.

· Any and all dismantled tower parts shall be recycled or properly disposed of by the Contractor.

Existing 80ft. guyed tower to be dismantled and removed from site.

4) Attachments

· Diagram 1

· Diagram 2

· Diagram 3

· Diagram 4

· Diagram 5

· Zip file of pictures of the existing tower

· American Products Quote for the Pedestal Enclosure Cabinet

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