Amendment 1.docx

Amendment 1:

Question: Can the Government confirm the official radar reference elevation and obstruction threshold criteria to be used for Tier classification, including whether the +50-foot scenario should be applied relative to the existing or proposed tower elevation?

Government Response: The baseline reference elevation for all Tier classifications shall be the top plate of the existing 15-meter lattice tower (upon which the radome sits). As stated in Section 4.3 of the PWS, the Contractor is required to verify the exact Mean Sea Level (MSL) elevation of this top plate. Regarding the "+50-foot scenario" referenced in the PWS: this 50-foot measurement is used strictly to maintain unit consistency with typical elevation modeling. Because actual physical tower extensions are manufactured in 5m increments (e.g., a 15-meter raise equals approximately 49.2 feet), a physical tower raise would not equal exactly 50 feet. However, for the purposes of the survey modeling and Tier classification deliverables, the Contractor shall calculate the proposed threshold by adding exactly +50 feet relative to the verified existing top plate elevation.

Question: Will the Government provide an authoritative parcel/ownership dataset for Zone A / Zone B classification, or should publicly available data be used? If public data is used, are there preferred sources or required disclaimers?

Government Response: The Government will not provide an authoritative or proprietary parcel dataset. Offerors should utilize publicly available municipal or county GIS parcel data (e.g., Cumberland County or Town of Gray tax assessor databases) to classify Zone A and Zone B boundaries. Standard contractor disclaimers regarding the inherent accuracy limits of public GIS data are acceptable.

Question: For the optional CLIN 0002, does the Government anticipate full coverage of all Tier 1 and Tier 2 obstructions, or a targeted approach based on priority clusters? For our cost estimate, should we assume the entire 1,200 ft radius?

Government Response: For the optional CLIN 0002, the Contractor should not assume the entire 1,200-foot radius. Ground-truthing and timber valuation for CLIN 0002 shall be strictly limited to Zone A (State/Lessor-controlled land). The Contractor shall not enter Zone B (Private Land) for inventory purposes. Within Zone A, the Government expects full coverage of all individual Tier 1 and Tier 2 obstructing trees, rather than a targeted cluster-based approach. Cost estimates should reflect the boots-on-the-ground assessment (species, DBH, health, and stumpage value) of every individual Tier 1 and Tier 2 tree located within the Zone A boundary.

Question: Are there any site-specific flight restrictions, coordination requirements, or RF-related limitations that may impact UAS LiDAR acquisition within the radar coverage area?

Government Response: Yes, the WSR-88D is a high-powered RF emitter. To protect both the UAS equipment and the integrity of the radar data, close coordination with the local Weather Forecast Office (WFO Gray) and the NWS Radar Operations Center (ROC) will be strictly required prior to flight operations. The Government will work with the awardee to schedule flight windows where the radar can be placed in standby mode or specific sectors can be blanked to ensure safe UAS operations. Standard FAA Part 107 airspace regulations also apply.