Potash Brook - Daryl Kuhn, 05/29/13

General Info

Investigator Name(s): 

Daryl Kuhn's 7-8 Science Class

Collection Date & Time: 

Wednesday, May 29, 2013 - 9:30am

Present: 

Steady Rain

School: 

Edmunds Middle School

Watershed: 

Lake Champlain Direct & Grand Isle Basins

River: 

Potash Brook (Lake Champlain Direct Flow)

Monitoring Site: 

Potash Brook East Woods

Latitude: 

44.448257

Longitude: 

-73.199104

Physical Assessment

Water Appearance: 

Muddy

Surrounding Development or Land Use: 

Park

Golf Course

Residential

Is there a water treatment plant upstream?: 

No

Do you see any pipes entering into the river?: 

No

Appox. Channel Width: 

33.00ft

Avg. Depth: 

1.60ft

Current Velocity: 

0.45ft/sec

Overhead Canopy

Canopy Cover: 

75%

Biotic Assessment

PT Group 1 (Intolerant)

Enter the number of each observed

Stonefly Nymph: 

33

Mayfly Nymph: 

2

Caddis Fly Larvae: 

1

Dobsonfly Larvae: 

7

Riffle Beetle: 

1

Water Penny: 

1

Right-Handed Snail: 

0

PT Group 2 (Moderately Intolerant)

Enter the number of each observed

Damselfly Nymph: 

1

Dragonfly Nymph: 

7

Sowbug: 

0

Scud: 

0

Cranefly Larvae: 

1

Clams/Mussels: 

0

Crayfish: 

1

PT Group 3 (Fairly Tolerant)

Enter the number of each observed

Midges: 

0

Black Fly Larvae: 

0

Planaria: 

0

Leech: 

1

PT Group 4 (Very Tolerant)

Enter the number of each observed

Left-Handed Snail: 

0

Aquatic Worms: 

0

Blood Midge: 

0

Rat-Tailed Maggot: 

0

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: 

38.0