RESULTS 



Russian Gulch Mine: The Russian Gulch Mine workings (T6NR15WS8NWSE) consist of two 

 open adit portals and one completely collapsed portal. The two open portals are connected by 

 the underground workings The upper, southern portal was entered on 9 July 1999. The passage 

 slopes downward and to the N for 1 1 m, where it intersects a drift that runs level approximately 

 E-W for 47 m. About halfway along this passage it intersects another passage that trends 

 downward (N) for 13 m This then intersects a second E-W trending drift The second 

 (northern) open portal is 28 m to the W from this point. To the east there is considerable 

 breakdown beyond 10 m, and the full extent of this passage was not explored Dry bulb 

 temperatures at either end of the connecting (13 m) passage were 43°F with 94% relative 

 humidity. Dry bulb temperature at the S portal was 77°F (relative humidity = 25%) at this time 

 (16:30 MDT). Total measured passage was 109 m, with largest dimensions of about 2 2 X 1 .5 m 

 (height X width). Height and width of the largest open portal (the southern one) were 0.7m and 

 15 m, respectively There was little evidence of human disturbance and the workings are 

 essentially dry. Warm air gently flowed into the mine through the southern portal, cooler air 

 flowed out of the mine through the northern portal. 



A Bushy-tailed Woodrat (Neotoma cinerea) was observed in the upper 47 m drift, where 

 Porcupine (Erethizon dorsatum) droppings were also present. No bats or bat spoor were seen 

 during the hour-long inspection The southern portal was netted for two hours (21:30-23:30) 

 No bats were captured, and none made passes near the portal However, bats made about 16 

 passes in the general area of the two portals during that time. Most passes were by some species 

 of Myutis (based on visual observation) while a few passes were made by a second larger species 

 (perhaps Big Brown Bat, Eptesicus fuscus) No bat calls were recorded overnight at either open 

 portal on ANABAT units. 



Frost Creek #1: This site (T7NR13WS31SENW) was not inspected, per BLM suggestion 



Frost Creek #2: This adit (T7NR13WS31NENW) has a partially open portal with a wooden 

 headffame and shonng, extending level and curving to the left in about 8-10 m. It was not 

 entered when visited on 10 July No air movement was noted at the portal A few intact 

 cobwebs extended across the opening No bat activity was recorded overnight on an ANABAT 

 unit 



Frost Creek #3: This adit (T7NR13WS30SESW) in lower Frost Creek is collapsed about 6-8 m 

 in from the portal, headframe and shoring, and has low potential for significant use by bats It 

 was not monitored overnight 



Frost Creek #4: This adit (T7NR13WS30SWSE) adjacent to the Frost Creek road consists of a 

 partially open portal (0 8 m high X 1 9 m wide) that leads into a level drift extending 27 m to the 

 drift face Drift height and width are 2 m and 1.5 m, respectively. A few cobwebs hung across 

 the portal at the time of inspection (13 05 MDT) on 10 July Dry bulb temperature at the drift 

 face was 45°F with 94% relative humidity A few old bat droppings were present near the drift 

 face, but there was no evidence of recent bat activity No bats were recorded on an ANABAT 

 unit left overnight at the portal 



