2025-11-03 PL-CRC-2025-000038 HIFL Draft AIS Testing Strategy

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the BMH (KH-01),one test trench (KH-02) in the location of the buried shoreline,and one test trench (KS-03) in the portion of this area within Puuone sand (Figure 16 and Figure 17, attached). Four test trenches (KH-04 through KH-07) target the portion of the project area at UHMC and are generally distributed across the area of ground disturbance,including one within the footprint of the CLS (Figure 18, attached).As UHMC is located within an area containing culturally sensitive soil (Puuone sand),the relative density of AIS test trenches is higher within this portion of the HIFL project area than in areas with less sensitive soils and substrates (Figure 19,attached). Molokai Cable Landing Site (Molokai Yacht Club and Molokai Education Center) The proposed cable landfall on the island of Molokai is located at the Molokai Yacht Club,just west of Kaunakakai Harbor,and the proposed CLS is located at the UH Maui, Molokai Education Center at the intersection of Kamehameha V Highway and Alanui Kaimike Street(Figure 20, attached). Project ground disturbance at the cable landfall will include the excavation and installation of a BMH, measuring 23 ft by 17 ft by 12 ft depth (7 m x 5.2 m x 3.7 m), and the excavation of approximately 730 linear ft(222.5 m), at a depth of 4 ft(1.2 m),for the installation of a fiber optic conduit, extending from the BMH, along an unpaved road and connecting with existing utility infrastructure located near Kamehameha V Highway. Project ground disturbance at the Molokai Education Center will include the excavation and installation of a foundation for a CLS (new modular structure),measuring 20 ft by 18 ft by 7 ft deep (3.7 m x 2.4 m x 2.1 m) and an adjacent generator foundation pad,measuring 9 ft by 4 ft by 2 ft deep (2.7 m x 1.2 m x 0.6 m),along with the excavation of approximately 210 linear ft(64 m), at a depth of 4 ft(1.2 m), for the installation of conduits for utility connections between the CLS and Molokai Education Center existing infrastructure. Previous archaeological studies have identified historic properties in the vicinity of the Molokai portions of the HIFL project area that reflect the continuous use of the south coastal flats of Kaunakakai during pre-Contact times for habitation, ceremonial practices, salt production,and agriculture, as well as post-Contact use for agricultural, industrial,and infrastructural activities, including the development of the wharf and railroad related to the American Sugar Company. Previous studies have identified two historic properties within the Molokai Yacht Club portion of the HIFL project area. These include SIHP 50-60-03-00630,a pre-Contact cultural deposit and 50- 60-03-02573,a post-Contact cultural deposit consisting of a burn area with associated remnant building material,including glass, ceramic, and metal (Figure 21).During Pacific Legacy's field inspection,an additional potential historic property(T-003) consisting of a pile of debris was also identified. No potential historic properties were identified in the portion of the project area at the Molokai Education Center(Figure 22). The proposed AIS testing strategy for the Molokai portion of the project area consists of thirteen (13) test trenches (MY-01 through MY-13), each measuring 5 m long by 0.7 m wide (Figure 23 and Figure 24, attached).Ten test trenches target the Molokai Yacht Club portion of the project area and include one test trench in the location of the BMH (MY-01) and nine test trenches generally distributed along the length of the fiber optic conduit trench (MY-02 through MY-10).Trench placement accounts for the location of previous AIS test trenches completed by Lee-Greig et al. (2016) in this area.Three test trenches target the Molokai Education Center portion of the project area and are generally distributed across the area of ground disturbance. One trench (MY-11) targets the proposed location of a handhole box and one trench (MY-13) targets the location of the proposed CLS. Lanai Cable Landing Site (Manele Harbor) The proposed cable landfall on the island of Lanai is located at Manele Harbor, and the proposed CLS is located at UH Maui,Lanai Education Center in Lanai City(Figure 25, attached). Project ground disturbance is limited to the cable landfall at Manele Harbor. Ground disturbance will Pacific Page 4 of 41 Legacy Hso pY'MCn am l