Atch_10_Questions_and_Answers_0003.docx
DOCX document 16 KB Posted
- Attached to
- AMIS DIABLO EAST RADIO TOWER
- Solicitation number
- 140P1226Q0045
About this file
This is a Questions and Answers document addressing technical clarifications for the Amistad National Recreation Area Diablo East Radio Tower replacement project (Solicitation 140P1226Q0045). The document provides the Government's responses to contractor inquiries regarding design specifications, responsibilities, and construction requirements for replacing an existing antenna tower with a new NELLO tower system.
Key clarifications include: the Contractor is responsible for providing and installing the grounding system per manufacturer recommendations (ring method not recommended due to cost); a Geotechnical Investigation has been conducted and foundation designs are provided on project drawings; new cables must be priced to replace existing short cables from the demolished tower; the Contractor must make final cable connections to Government Furnished Equipment in the Radio Equipment Shelter and is responsible for removing and reinstalling existing NPS/NOAA antenna systems onto the new tower; the old concrete foundations will be cut at ground level with NPS staff handling fence repairs; the new tower requires an Ice Bridge for cables, red warning lights, and must be designed per Risk Category III standards for essential public safety/Law Enforcement use; existing Radio Shelter port holes should remain at three unless absolutely necessary for additional installations; antenna heights for the two ANT150F2 Omni antennas and 5-element Yagi antenna should match the existing tower configuration, though the exact make and model of the Yagi antenna remain unknown.
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Other files
| File | Type | Posted |
|---|---|---|
| Sol_140P1226Q0045_Amd_0003.pdf | ||
| Atch_8_Questions_and_Answers_0002.docx | DOCX document | |
| Atch_9_Sign_in_sheet_0002.pdf | ||
| Sol_140P1226Q0045_Amd_0002.pdf | ||
| Sol_140P1226Q0045_Amd_0001.pdf | ||
| Atch_3_SOW_8_3_Proposed_Tower_and_Foundation_Drawings.pdf | ||
| Atch_5_Technical-Experience_Questionnaire.xls | XLS spreadsheet | |
| Sol_140P1226Q0045.pdf | ||
| Atch_7_DOL_WD_2015-5303_Rev_32.pdf | ||
| Atch_4_SOW_8_4_APPROVED_GRAVEL_and_SOIL_SOURCES.docx | DOCX document | |
| Atch_2_SOW_8_1_Site_Location_and_8_2_Photos.docx | DOCX document | |
| Atch_6_Price_Schedule.docx | DOCX document | |
| Atch_1_SOW_Diablo_East_Tower.docx | DOCX document |
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Text version
34. Per. DWG NO: 649443 Tower Notes:
11 & 12 states Grounding Systems & Materials by others. Please clarify since there are no grounding drawings who will be responsible if drawings state by others?
The grounding system would need to be provided by the contractor per the manufacturer’s recommendation. Due to the higher cost of the ring method, it is not recommended at this time.
If so please provide a grounding system plan for this new tower.
The grounding system will need to be installed per manufacturer’s recommendation.
35. Per your design by NELLO has a Geotechnical Investigation been conducted at this location or will we use the foundation design provided on SHEETS 1 OF 3 & 2 OF 3 on Drawing?
Yes.
36. During site visit we noticed that the existing cables coming down the old tower that’s to be demoed have previously been spliced & will be short in length to reinstall back to the New NELLO tower.
Should we figure out the pricing of new cables?
Yes.
37. Who will be responsible for making the final cable connections to Government Furnished Equipment (GFE) that’s located inside the Radio Equipment Shelter?
The Contractor.
38. On the old tower to be demoed who is responsible for removing & reinstalling existing NPS / NOAA antenna systems onto the new NELLO tower?
The Contractor.
39. Once the old Antenna tower has been demoed / decommissioned what needs to be done with the old concrete foundations throughout supporting the guy wires, Antenna base & existing chain link fence in multiple locations?
They will cut down at ground level, and the NPS staff will be responsible for repairing the fence.
40. The old antenna does not have an Ice Bridge for the existing cables between the existing Tower & Shelter will the new NELLO Antenna tower require an Ice Bridge?
Yes.
41. Will the existing Radio Shelter require any new Port holes installed on to it if so how many?
If absolutely needed and cannot use existing yes. It currently has three, we would suggest it stays as is.
42. Does this new NELLO tower require any lights to be installed on it?
The original has a red light so yes.
43. The old foundation will NOT be reused, and a new foundation will be installed, correct?
Yes.
44. Does the tower need to be designed using Risk Category III since it is being stated as essential for public safety?
Yes, it is for Law Enforcement.
45. For the loading, what height are the (2) ANT150F2 Omnis?
Should be same height as on the existing tower.
46. For the loading, what height is the 5-element Yagi Antenna?
Should be same height as on the existing tower.
47. Can you provide the model number/spec sheet of the 5-element Yagi Antenna?
The exact make and model are unknown.
File details come from the government source that posted it. Updated .