2019 Hydrology Project Report

The Carroll Cave Stream Flow Project is complete for 2019. The file linked at the bottom of this post contains all of the raw data, the processed data and full year graphs in both PDF and JPG format.

The data shows two major floods in the cave. One was in early May and the other in early June. The May flood reached just over 8 feet in Thunder River at the ladder, with almost 18 feet below Thunder Falls. The June flood reached about 3 feet at the ladder and 13 feet below Thunder Falls. read more

21 Dec 2019 Survey of area caves

Project manager: Jim Cooley
Trip purpose: Privately owned cave surveys
Areas of Cave visited: Campground
Trip participants: Jim Cooley, Bill Gee, Ken Grush, Seth Colston, Ginny Friedrich
Entry Time: 12/20/2019
Exit Time: 12/23/2019


Cooley, Gee and Grush arrived before dark, Colston well after dark on Friday, 12/20. Ginny arrived 9:00 a.m. Saturday morning. We camped for up to three nights. Cooley replaced locks on the road gate and the silo. Both locks are set to the same combination. All the locks were lubed and some penetrating oil was left in the silo for future lock maintenance. read more

26 October 2019 Bat Census

Areas Visited – Carroll Passage to the Lunch Room

Time In – 9:30am
Time Out – 2:00pm

Participants – Bill Gee (trip leader)
Seth Colston
Hou Zhong

Permit number 1910-1

This was supposed to be our annual bat census trip where we count bats from the Lunch Room to the Mountain Room. One of the participants dropped out very early Saturday morning, leaving us no time to recruit a replacement. read more