Nonpoint Source Stream Reach Assessment Form 



PLEASE CHECK THE HOST APPROPRIATE ANSWER FOR EACH PARAMETER. HAKE SURE TO ELABORATE WHEN ASK OR WHENEVER NECESSARY TO CLARIFY 



YOUR ANSWER. ! 



6ENERAL ASSESSHENT PARAMETERS 



1. NATURAL EROSION : (NATEROS) NATURAL EROSION OCCURRING OUTSIDE OF HIGH WATER MARK BUT WITHIN 200' OF THE STREAM. DO NOT 

 BASE THIS RATING ON HUMAN OR STREAM CHANNEL/BANK EROSION . CONSIDER EROSIVE FEATURES SUCH AS LAND SLUMPS/SLIDES, 

 GULLIES/RILLS/SHEETS ETC. 



EROSION EVIDENT: NONE OR MINOR SOME MODERATE SEVERE [PLEASE ELABORATE] 



LAND USE : (LAND) HUMAN ACTIVITIES WITHIN THE WATERSHED THAT HAVE THE POTENTIAL TO CREATE NPS POLLUTION. 

 CHECK ONE OR MORE ITEMS TO DESCRIBE DISTANCE FROM STREAM CHANNEL THAT ACTIVITIES HAVE OCCURRED: 

 NO ACTIVITIES HAVE OCCURRED ^GREATER THAN 200' 50-200' LESS THAN 50' 



LIST PREDOMINANT ACTIVITIES AND HOW RECENT THE ACTIVITIES ARE (<5, 5-10, >10 YEARS) FOR EACH DISTANCE CATEGORY. 

 > 200' 



50 - 200' 



< 50- 



NONPOINT SOURCE POLLUTION : (NPSP) CONSIDER ONLY THE POLLUTION THAT APPEARS ATTRIBUTABLE TO HUMAN ACTIVITIES. [PLEASE 

 ELABORATE] | 



POLLUTION EVIDENT: NONE SOME, THOUGH NOT COMMON MODERATE SEVERE 



(EXAMPLES MIGHT Be SEDIMENT DEPOSITION IN ROAD DITCHES OR BELOW EPHEMERAL, MANURE, IRON PRECIPITATES, TRASH ETC.) 



BANK STABILITY : (BANKS) CONSIDER ALL OBSERVED STREAM BANK EROSION. [PLEASE ELABORATE] 



NONE OR MINOR EVIDENCE OF BANK EROSION OR FAILURE (<10X OF TOTAL). 



MODERATE INSTABILITY, MODERATE AREAS OF BANK EROSION OR BANK FAILURE (10-20X OF TOTAL). 



SUBSTANTIAL INSTABILITY, FREQUENT AREAS OF BANK EROSION OR FAILURE (21-405! OF TOTAL). 



UNSTABLE, SEVERE BANK EROSION AND FAILURE (>40X OF TOTAL). EROSION OCCURS ON STRAIGHT SECTIONS AND BENDS. 



• AVERAGE SIZE OF ERODED BANKS; HEIGHT <1 ' 1-3' >3' LENGTH <5' 5-20' >20' 



• ARE BANKS VERTICALLY EROSIONAL UNDERCUT SLUMPS OTHER (DESCRIBE) 



• DOES THE EROSION APPEAR TO PRIMARILY BE THE RESULT OF HUMAN ACTIVITY ? YES NO 



SUBSTRATE COMPOSITION : (SUBCOMP) CONSIDER ONLY THE TOP (VISIBLE) UYER OF SUBSTRATE MATERIAL. 



RIFFLE « RELATIVELY SHALLOW, FAST MOVING, WITH BROKEN OR TURBULENT SURFACE, BUN " MODERATE FLOW, WATER SURFACE NOT 



TURBULENT TO THE POINT OF BEING BROKEN; POOL - SLOW FLOW, SMOOTH SURFACE, GENERALLY DEEPER THAN A RUN OR RIFFLE. 



• LIST THE DOMINANT SUBSTRATE MATERIAL FOR EACH FEATURE: RIFFLE RUM POOL 

 FINES <1/4''DIA., GRAVEL ^/l,•-Z'DlA. . COBBLE/RUBBLE 3"-12"DIA., 



BOULDERS/BEDROCK >12"DIA 



• ESTIMATE PERCENTAGE OF FINE MATERIAL (<1/4") fOR EACH FEATURE: ■ 



• INDICATE THE AREA OF THE CHANNEL WHERE THE MAJORITY OF FINE MATERIAL IS 



DEPOSITED: EDGE, MIDDLE, DOWNSTREAM OF ROCKS/LOGS, THROUGHOUT 



• IS SUBSTRATE MATERIAL CEMENTED (SURROUNDED BY TIGHTLY PACKED FINES)? YES, NO. 



MISC. NOTES: 



Page 208 Flathead Basin Cooperative Program Final Report 



