YCT Multi-state Assessment 



February 10, 2003 



I BARRIERS 



Mark Geologic Barriers on Both Maps and Give Unique Number with a square around it. 



Mark all other Barriers on Current Map and Give Unique Number with a square around it. 



All known geologic barriers - waterfalls- use HIGH for DQ Rating and Judgment for Source 



BarrlerTYpe 



Water diversion 



Fish culture 



facility/research 



facility 



Temperature 



Bedrock 



Culvert 



Debris 



Insufficient flow 

 Manmade Dam 



Pollution 



Beaver dams 



Unl<nown 

 Velocity barrier 

 Waterfall 



Hue Number: 



Barrier Number: 



Barrier Type (Circle One) 

 One) 



Blockage Extent (Circle 



Barrier Significance (Circle One) 



BarrSlgnlf 



Prevents introgression 



Prevents ingress of competing species 



Migration barrier 



Temporary, but presently prevents 

 introgression 



N/A 



Unknown 



Data Quality Rating (Circle one) 



Source (Circle One) 



Source 



Judgment 



Anecdotal 

 Information 



Letter 



News Account 



Data files 



Agency Report 



Published Paper 



Thesis or 

 Dissertation 



Other 



Page - 59 



