Addendum 5 - PW1707-25.pdf

PW1707-25 - ITB - Construction and Other Site Improvements at Various Radio Communications Sites for the Marion County Radio Project Page 1 of 4

ADDENDUM #5

TO THE

INVITATION TO BID

PW1707-25 - ITB - CONSTRUCTION AND OTHER SITE IMPROVEMENTS AT

VARIOUS RADIO COMMUNICATIONS SITES FOR THE MARION COUNTY RADIO

PROJECT

ISSUED ON 10/8/2025 8:00:00 AM

The following information in this addendum, hereby become part of the Invitation To Bid. It is essential that all prospective Offerors note the content of this Addendum.

A. Question and Answers:

1. Is there an Engineer’s Estimate for bonding purposes?

The engineer's estimated range is $2,500,000 to $5,000,000.

2. All sites as applicable: Are there no proposed contour changes from existing contour lines based on Grading plan on ER1? If there are proposed contour changes, can engineer show final contour lines as an overlay with existing contour lines?

Grading and contour changes are required at some sites. These changes are depicted in the drawings using a combination of proposed contour lines, spot elevations (spot shots), and slope arrows to convey the intended grading. The existing and proposed grades are represented throughout the plan set in various formats to assist bidders in understanding the scope of grading work. No additional grading plans are anticipated beyond what is currently shown.

3. All sites as applicable: LP tank detail on Sheet C5 implies an ice canopy is required over LP tank, yet site plan on Sheet C2 does not depict it (on APW) and DOES depict it (on House Mountain). Please confirm which sites REQUIRE LP tank ice canopy. Are any detail or model numbers available for the “Grating Pacific propane canopy”? (Or will any installation of grip strut on legs over the LP tank suffice?) Does the ice canopy need to cover the entire tank footprint as implied in section view of detail on Sheet C5, or only critical components as shown on site plan Sheet C2 at House Mountain (similar to existing)?

All the LP tanks are to have ice protection over the fueling plumbing. A 24-inch-wide grip strut canopy assembly—similar in design to the ice bridge—is acceptable for this purpose.

The canopy is intended to protect the fuel piping specifically, not necessarily the entire tank footprint. Regardless of depiction, the Contractor supply and install ice protection over the fueling components on all tanks. No specific model number is required for the “Grating

Pacific propane canopy”; any structurally sound grip strut installation that meets the dimensional and functional intent shown in the detail is acceptable.

4. Has a Phase 1 ESA been performed for any of the sites? Are there any hazardous materials or conditions the GC should be aware of before excavation?

See Addendum #1, Question 12. No hazardous materials have been identified at any site except for the asbestos-containing roofing material at Lower Prospect.

5. House Mountain: Based on other questions already answered regarding existing generators, LP tanks and maintaining site operations, can the existing site be considered as “operational” with only a single generator and single 1000 gallon LP tank connected for temporary conditions, while other tanks are plumbed for the final install configuration with the new generator?

At House Mountain, it is anticipated the Contractor will take advantage of the multiple, existing propane tanks to maintain temporary fuel supply to the existing generators and/or temporary fuel supply to the new generator during the cutover and tank relocation processes.

The sequence of executing this work is up to the Contractor. A full 1000-gallon tank provides enough fuel to power the existing generators for a number of weeks. Marion County would not take exception to the use of a single 1000-gallon tank to fuel the existing generators on a temporary basis provided the tank starts with enough fuel to comfortably supply the generators during construction without a risk of running out of fuel or developing a vapor lock.

6. For the solar powered sites (such as House Mountain or APW) – will the GC be responsible to install any conduits or conductors from any of the PV infrastructure to the shelter? If so, what are the details (they don’t appear to be in the drawings). Or will this scope be bid separately or done by others?

For solar-powered sites such as House Mountain and APW, the Contractor is responsible for installing conduit runs from the solar array to the shelter, as shown in the drawings.

However, the installation of solar conductors (wiring) is not included in this scope and will be performed by others. In other words, the Contractor shall install the cable pathway and Marion County will install the conductor.

7. For the solar powered sites (such as House Mountain or APW) – is GC responsible to install the (2) hybrid split HVAC systems for which we are responsible to supply? (Note on C2 reads, “Contractor responsible to supply”; Note on SH5 reads, “installed and wired by others” (pertaining to the AC wiring for the HVAC). If GC is responsible for the AC electrical installation of the HVAC, is the GC ALSO responsible for the DC electrical installation of this hybrid HVAC, or will that be part of a future bid for connectivity with other DC work?

Yes, the Contractor is responsible to supply and install the (2) hybrid split HVAC systems at the solar-powered sites, such as House Mountain and APW. The Contractor is also responsible for completing the AC electrical connections for these units, as indicated in the drawings. However, the DC electrical installation associated with the hybrid HVAC systems will be performed by others and is excluded from the Contractor’s scope of work.

8. Please identify all Shelter One exterior equipment shelter, generator shelter and snow vestibule components that are provided by Shelter One but still require field installation and won’t come already installed on the structure “as received” (eg – generator plug, ladder, hood/duct, canopy/awning, light fixture, GFCI, etc.)

Refer to the Shelter One drawings in the Plans and Drawings to determine which exterior components are factory-installed versus those requiring field installation. If a component is shown on the Shelter One drawings, it is assumed to be pre-installed unless specifically noted as “provided by others.” For example, the HVAC is to be provided and installed by the Contractor. The snow vestibule is delivered as a separate prefabricated structure and must be field-installed by the Contractor in accordance with manufacturer requirements.

9. House Mountain (and other sites as applicable): bollards are not shown as bonded to ground ring in the grounding plan, yet compliance with Motorola R56 has been cited, which would require bonding of all steel bollards. Is it acceptable to sleeve the bollards with plastic covers to eliminate the need to R56 bond all 11 bollards? Or will you require all 11 bollards be bonded to the ground ring to comply with R56? Or will you waive R56 compliance as it relates to bonding the bollards to the ground ring?

All steel bollards are required to be bonded to the site’s grounding system in accordance with Motorola R56 standards. Specifically, each bollard must be bonded either to the ground ring or to the propane tank foundation ground to ensure a common grounding path. Sleeving the bollards with plastic covers does not eliminate the requirement for bonding under R56.

Unless otherwise directed, the Contractor must bond all 11 bollards at House Mountain—and any similar installations at other applicable sites—to comply with the specified grounding requirements.

10. House Mountain LP tank bonding to ground ring: only 1 tank of 4 final are shown bonded to the ground ring, yet Motorola R56 compliance would require all 4 to be bonded. Are you waiving this R56 requirement, or will the GC need to bond all 4 (final) LP tanks?

At House Mountain, the Contractor must bond all four (4) propane to the site’s common grounding system to comply with Motorola R56 standards. R56 compliance is not being waived for this aspect.

11. Are AGB(s), TGB and EGB to be installed by the GC or by others?

The Antenna Ground Bars (AGBs) will be supplied and installed by Marion County’s radio vendor under a separate contract and are excluded from the Contractor’s scope of work.

The Contractor shall supply and install the Tower Ground Bars (TGB) located at the base of the towers.

The Contractor shall supply and install the Exterior Ground Bar (EGB), which must be installed on the ice bridge structure prior to the shelter feed line entry point.

All grounding components shall be installed in accordance with applicable R56 standards.

12. Sign details: Drawings indicate (5) discreet signs required: No Smoking, RF blue, RF yellow, Emergency Contact & General Notice. How many of each sign is required for each site?

Contractor shall provide and install two (2) full sets of signs; one (1) set of signs at the entryway to each new government-furnished prefabricated equipment shelter, and one (1) set of signs on the chain link entry gate to each site. The only exception is House Mountain, where only the equipment shelter signs are needed because House Mountain has no perimeter fence.