Potash Brook (Lake Champlain Direct Flow) - Jim Kelley, 05/28/13

General Info

Investigator Name(s): 

Navigator Students

Collection Date & Time: 

Tuesday, May 28, 2013 - 9:00am

Present: 

Clear/Sunny

School: 

Edmunds Middle School

Watershed: 

Lake Champlain Direct & Grand Isle Basins

River: 

Potash Brook (Lake Champlain Direct Flow)

Monitoring Site: 

East Woods

Latitude: 

44.447836

Longitude: 

-73.198224

Physical Assessment

Water Appearance: 

Cloudy

Muddy

Foamy

Surrounding Development or Land Use: 

Golf Course

Residential

Appox. Channel Width: 

50.00ft

Avg. Depth: 

5.50ft

Current Velocity: 

109.00ft/sec

River Bottom Composition

Bedrock: 

90%

Sand, Silt, Clay: 

10%

Bank Vegetation

Left bank: 

30%

Right bank: 

70%

Riparian Vegetation Zone

Left bank: 

12ft

Right bank: 

15ft

Overhead Canopy

Canopy Cover: 

7%

Biotic Assessment

PT Group 1 (Intolerant)

Enter the number of each observed

Stonefly Nymph: 

1

Caddis Fly Larvae: 

1

Dobsonfly Larvae: 

1

Riffle Beetle: 

1

Water Penny: 

1

Right-Handed Snail: 

1

PT Group 2 (Moderately Intolerant)

Enter the number of each observed

Dragonfly Nymph: 

1

PT Group 3 (Fairly Tolerant)

Enter the number of each observed

Midges: 

1

Pollution Tolerance Index Rating

= 4*(Total # in PT Group 1) + 3*(Total # in PT Group 2) + 2*(Total # in PT Group 3) + 1*(Total # in PT Group 4)

23+ (Excellent)
17-22 (Good)
11-16 (Fair)
10 > (Poor)

PT Index Rating: 

29.0