Priority: Alternate

Position: 44.57037°N, 125.075417°W

Water Depth: 1200 m

Sediment Thickness: ~7 km

Target Drilling Depth: 620 mbsf

Approved Maximum Penetration: 620 mbsf

Seismic Coverage: TTN112 3-D high-resolution seismic survey

Objectives: To establish the source and distribution of gas hydrate and associate subsurface biosphere in a slope basin characterized by rapid deposition of terrestrial sediments (same as proposed Site HR2alt; this site would be drilled if problems were encountered at proposed Site HR2alt).

Drilling Program: APC to refusal, XCB to refusal, RCB as necessary to reach target depth. Three holes. Frequent use of PCS and/or HYACE.

Logging and Downhole Program: LWD, triple combo, APC-temperature, DVTP, APC methane tools.

Nature of Rock Anticipated: Interlayered silts and clays, some authigenic carbonates possible, highly deformed accretionary complex sediments.