Indian Brook - Tier 3 Report - 10/05/21

Physical Parameters Assessment

Investigator Name(s):

Charlotte O'Brien

Collection Date & Time:

Tuesday, October 5, 2021 - 1:00pm

School:

Colchester High School

Town:

Colchester

Watershed:

Lake Champlain Direct & Grand Isle Basins

River:

Indian Brook

Monitoring Site:

Intersection of Suzie Wilson road and Indian Brook stream in Colchester

Surrounding Development or Land Use:

Residential

Forest

Water Appearance:

Cloudy

Tea-colored

Average Embeddedness:

51-75%

Average Velocity:

0.31m/s

Exact Location

This will be used to locate your collection site on our interactive map. You can use this tool if you need help finding the coordinates.

Latitude:

44.51

Longitude:

-73.13

Average Transparency/Turbidity

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

Turbidity:

11.00NTU

Chemical Assessment

Introduction:

Materials and Methods:

Results:

Discussion:

Stream Habitat Assessment

Good Habitat: Score of 80 to 60 ----- Fair Habitat: Score of 59 to 40 ----- Poor Habitat: Score of 39 to 0

Substrate Habitat Types (Score):

40 to 70% has mix of stable habitat types (6)

Embeddedness:

25 to 50% embedded; rocks more difficult to move (6)

Sediment Deposition:

5 to 30% of riverbed effected by new deposition (6)

Velocity / Depth Types:

Slow & deep

Slow & shallow

Fast & deep

Fast & shallow

Velocity / Depth Types (Score):

All four velocity/depth types present (8)

Channel Flow Status:

Water fills > 75% of channel; < 25% of substrate exposed (6)

Channel Alteration:

Alteration minimal; river with natural pattern (4)

Frequency of Riffles:

Occurrence of riffles common (3)

Bank Stability (Left Bank):

Somewhat unstable; 30 to 60% eroded or collapsed (2)

Bank Stability (Right Bank):

Moderately stable; 5 to 30% eroded or collapsed (3)

Riparian Vegetation (Left Bank):

70 to 90% covered by natural vegetation (3)

Riparian Vegetation (Right Bank):

> 90% covered by natural vegetation (4)

Riparian Zone Width (Left Bank):

Width 12 to 18 meters; minimal human impact (3)

Riparian Zone Width (Right Bank):

Width > 18 meters; no human impact (4)

Stream Habitat Quality Score

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

60-80 (Good)
40-59 (Fair)
0-39 (Poor)

Stream Habitat Quality Score for This Report:

Biological Assessment

The Water Quality Score is calculated by adding together the the Index Values calculated for each Sensitivity Group on the field sheet.

40+ (Excellent)
30-39 (Good)
20-29 (Fair)
0-19 (Poor)

Group I (Sensitive) Index Value:

5.0

Group II (Moderately Sensitive) Index Value:

9.6

Group III (Tolerant) Index Value:

3.6

Water Quality Score for This Report: