CALVIN CAVE is named for Jack Calvin one of the original founders of the Sitka Conservation Society who helped to protect West Chichagof as a Wilderness area. The following report and map were produced by Kevin Allred with the Tongass Cave Project. Kevin joined the SCS Wilderness crew on a trip to West Chichagof in the summer of 2011. See videos of the trip here.
DESCRIPTION: Calvin Cave was discovered on June 19, 2011 by Kevin Allred, and the Sitka Conservation Society Wilderness crew: Adam Andis, Tomas Ward, and Ben Hamilton, while searching for caves as part of the Sitka Community Wilderness Stewardship Project. The cave is located at the lower edge of a large muskeg which provides acidic waters where it flows onto the band of Whitestripe Marble of Triassic age. After a meandering stream slot, the small stream enters the cave, which is a winding narrow crack downcut into the marble. Down the slope are a series of sinkholes which indicate the downstream course of the underground stream. After about 60 feet the cave ends in too tight constrictions at the bottom of the first of these sinkholes, and daylight is seen in several places. There is an excellent example of the underside of a "sealed" sinkhole with its characteristic humus plug here. The cave was surveyed by Kevin Allred and Tom Ward. Its vertical surveyed depth is 10 feet and it has 63.8 feet of surveyed passage. The resurgence of this cave stream is not known, but is probably somewhere adjacent or under the nearby gorge of Marble Creek.
BIOLOGY: Fungus gnat webs were noted throughout the cave, but no insects were seen. No bones were seen.
MANAGEMENT RECOMMENDATIONS: Due to its remoteness, Calvin Cave is not likely to be negatively impacted by visitation. It is protected from logging under Wilderness Area regulation.