Stream Redesignation Evaluation Report
Water Quality Standards Review

INDIAN SPRING RUN
CHESTER AND LANCASTER COUNTIES SEGMENT
Stream Code: 07538
Drainage List: O

 

TABLE 7
RBP METRIC COMPARISON
INDIAN SPRING RUN, CHESTER COUNTY
FEBRUARY 8, 2001
 

METRIC1

STATION

1ISR

2ISR

3UNT

4ISR

R1

1.

TAXA RICHNESS

24

28

21

10

24

 

Cand/Ref (%)

100

>100

88

42

---

 

Biol. Cond. Score

6

6

6

0

6

 

2.

MOD. EPT INDEX

12

14

10

0

14

 

Cand/Ref (%)

86

100

71

0

---

 

Biol. Cond. Score

6

6

4

0

6

 

3.

MOD. HBI

3.02

3.01

3.52

5.59

2.72

 

Cand-Ref

0.30

0.29

0.80

2.87

---

 

Biol. Cond. Score

6

6

4

0

6

 

4.

% DOMINANT TAXA

17

17

19

35

34

 

Cand-Ref

<0

<0

<0

1

---

 

Biol. Cond. Score

6

6

6

6

6

 

5.

% MOD. MAYFLIES

13

14

4

0

16

 

Ref-Cand

3

2

12

16

---

 

Biol. Cond. Score

6

6

4

4

6

 

TOTAL BIOLOGICAL CONDITION SCORE

30

30

24

10

30

% COMPARABILITY TO REFERENCE

100

100

80

33

---

 

1 - Stations 1ISR, 2ISR, 3UNT, and 4ISR compared to R1

 

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