Draft Supplemental AIS Report Kamehameha Highway Guideway

Cultural Surveys Hawai‘i Job Code: WAIMALU 2
Results of Fieldwork
Artifacts Discussion: No artifacts were observed.
Feature Discussion: No features were observed.
Terrestrial Faunal Remains Discussion: No terrestrial faunal remains were observed.
Sample Results: No sample analysis was conducted.
GPR Discussion: A review of amplitude slice maps revealed no linear features that might
indicate the presence of utilities. Reflectivity was relatively uniform throughout the grid and
stayed continueous with depth. A slight transition from higher reflectivity to lower reflectivity
was observed at approximately 0.25 mbs (see Appendix B, Figure 29).
GPR depth profiles for PRS-4 identified horizontal banding, commonly associated with
stratigraphic layering, throughout the area (see Appendix B: Figure 30). This banding
corresponded to variations of density and chemical composition within fill deposits. The profile
also indicated a change in reflectivity which occurred around 0.25 mbs. No utilities were
observed in the profile. The maximum depth of clean signal return was approximately 1.0 mbs.
Summary: PRS-4 was excavated to a maximum depth of 2.65 mbs and the water table was
reached at 2.5 mbs. The excavation of PRS-4 was limited by the presence of two metal utility
pipes. The stratigraphy of PRS-4 consisted of fill strata (Strata Ia-Id) overlying a natural clay
loam (Stratum II). Stratum Id was a fill material with petroleum contamination, possibly
associated with a former gas station. Stratum II generally conformed to the USDA soil survey
designation of Honouliuli clay (HxA). No archaeological cultural resources were observed
within PRS-4.
Supplemental Archaeological Inventory Survey, HHCTCP Section 2, Pearlridge Station, Waimalu Ahupua‘a, ‘Ewa, O‘ahu 30
TMK: (1) 9-8-009:017 and (1) 9-8-010:002