Robert's Incline (T9S, R27E, Sec. 9NWSW). We trapped the portal of this site (5865' 

 elevation) on the night of 28 July. The portal (about 6' tall x 8' wide) is in a matrix of unstable 

 rock, supported by a partially collapsed headframe. This working, actually a decline, was not 

 inspected internally because of the partial collapse of the passage, but from the portal appeared to 

 be a simple working extending at least 80' (Martinez [1995] states the adit extends >200'). 



We recorded slight activity in the area during three hours, and captured only two male Western 

 Small-footed Myotis entering the portal (Table 1). We briefly heard Spotted Bat calls upslope 

 from the portal at 00:20 on 29 July. 



Table 1. Summary of bats captured at abandoned mines in the Pryor 

 Mountains, Carbon County, Montana in summer 2001. MYCI = Myotis 

 ciliolabrum (Western Small-footed Myotis), MYEV = Myotis evotis 

 (Western Long-eared Myotis), EPFU = Eptesicus fusciis (Big Brown Bat). 

 M = male, F - female. 



Marie (T9S, R27E, Sec. 8SENE). This mine (6000' elevation) has over 950' of workings on two 

 levels. From the portal (8.5' tall x 14' wide) the mine descends at a moderate angle for 440' 

 where it intersects perpendicular passage mnning east and west. There is a second level of 

 workings at this point, accessed through a dome-like stope or nearby ore chutes in both sections 

 (east and west) of perpendicular passage. Mine temperature and relative humidity at the 

 intersection on 25 July were 46.5 °F and 90%, respectively. There are several side workings off 

 of the west passage, which is level and extends 242' to the drift face, where it was 47.0 °F with 

 85% relative humidity. The east passage ascends slightly for 121' to the drift face, where it was 

 49.5 °F with 84% relative humidity. We found scattered Myotis droppings in both sections of 

 the east-west perpendicular passage, but saw no bats on either visit underground (25 July and 5 

 September). There was also evidence of recent human visitation throughout the mine, but 

 especially in the decline from the portal to the perpendicular passage. Evidence included spent 

 fireworks, charred firewood, boot prints, and discarded beer cans. 



We netted the portal for four hours on the night of 24 July. There was slight bat activity at the 

 portal, and we captured only two bats (Table 1), a male Western Small-footed Myotis and a male 

 Big Brown Bat attempting to enter the mine. 



