Lewis Creek - Tier 2 Report - Ashley Eaton, 09/29/15

Physical Parameters Assessment

Investigator Name(s): 

Charlotte Central School - GCalvi

Collection Date & Time: 

Tuesday, September 29, 2015 - 10:45am

School: 

Charlotte Central School

Watershed: 

Otter/Lewis Basin

River: 

Lewis Creek

Monitoring Site: 

Lewis Creek

Surrounding Development or Land Use: 

Residential

Forest

Road Along Bank

Do you see any pipes entering into the river?: 

No

Is there a water treatment plant upstream?: 

No

Canopy Cover: 

0-25%

Water Appearance: 

Clear

Cloudy

Green

Muddy

Water Odor: 

Rotten Eggs

Average Embeddedness: 

26-50%

Average Velocity: 

2.30m/s

Exact Location

Latitude: 

44.33

Longitude: 

-73.11

Weather

Present: 

Overcast

Past 48 Hours: 

Clear/Sunny

Overcast

Showers

Average Transparency/Turbidity

No Impact: >60 cm - 17cm = 0-50 ntu
Possible Impact: 17 - 8cm = 65-150 ntu
Impacted: 8 - < 6 cm = >150 ntu

Height of Water Column: 

63.00cm

Turbidity: 

10.00NTU

Chemical Assessment

Average Temperature: 

19.00°C

Average pH: 

7.40

Average Orthophosphate PO4-3: 

0.02mg/L

Average Dissolved Oxygen: 

4.00mg/L

Stream Habitat Assessment

Streambed Composition: 

Mixture of cobbles, gravels, and sand (3)

Streambank Stability: 

Moderately stable banks – some areas of erosion visible (1)

Deepest pool is at least: 

Knee deep (1)

Velocity: 

Fast – quickly takes objects downstream (2)

Riparian Vegetation: 

Mixture of trees, shrubs, and grasses (3)

Riparian Vegetative Zone Width: 

Buffer zone is between 25 and 50 feet (1)

Streambed Cover

Rock ledges: 

1

Submerged logs, stumps, or tree roots: 

1

Large rocks: 

0

Artificial objects: 

0

Other: 

0

Stream Habitat Quality Score

Calculated by adding all of the points from the above fields.

18-22 (Excellent)
11-17 (Good)
6-10 (Fair)
0-5 (Poor)

Stream Habitat Quality Score for This Report: 

13

Biological Assessment

PT Group 1 (Intolerant)

# of Taxa: 

0

PT Group 2 (Moderately Intolerant)

Damselfly Nymph: 

1

Dragonfly Nymph: 

1

Scud: 

1

Cranefly Larvae: 

1

Clams/Mussels: 

1

# of Taxa: 

5

PT Group 3 (Fairly Tolerant)

Midges: 

1

# of Taxa: 

1

PT Group 4 (Very Tolerant)

# of Taxa: 

0

Pollution Tolerance Index Rating

Calculated as follows:
4*(# of Taxa in PT Group 1) + 3*(# of Taxa in PT Group 2) + 2*(# of Taxa in PT Group 3) + 1*(# of Taxa in PT Group 4)

23+ (Excellent)
17-22 (Good)
11-16 (Fair)
0-10 (Poor)

PTI Rating for This Report: 

17.00