Stream Redesignation Evaluation Report
Water Quality Standards Review

Crum Creek
Chester and Delaware Counties
Segment: Basin, From Source to Springton Reservoir
Drainage list: G
Stream code: 00692

TABLE 7
RBP METRIC COMPARISON
CRUM CREEK, CHESTER COUNTY
MAY 9-10, 2000
  METRIC1 STATION
1CC		 STATION
2CC		 STATION
3WB		 STATION
4CC		 STATION
5UNT		 STATION
6CC		 STATION
R1		 STATION
R2
1. TAXA RICHNESS
20
22
18
19
12
17
13
18
  Cand/Ref  (%)
154
169
138
105
92
94
xxx
xxx
  Biol. Cond. Score
6
6
6
6
6
6
6
6
   
 
 
 
 
 
 
 
 
2. MOD. EPT INDEX
7
6
7
8
6
6
8
10
  Cand/Ref  (%)
87
75
87
80
75
60
xxx
xxx
  Biol. Cond. Score
6
4
6
6
4
4
6
6
   
 
 
 
 
 
 
 
 
3. MOD. HBI
4.8
4.4
2.5
4.2
2.5
4.1
2.0
2.1
  Cand-Ref
2.8
2.4
0.5
2.1
0.5
2.0
xxx
xxx
  Biol. Cond. Score
0
0
6
0
6
0
6
6
   
 
 
 
 
 
 
 
 
4. % DOMINANT TAXA
34
20
52
45
43
36
38
46
  Cand-Ref
<0
<0
14
<0
5
<0
xxx
xxx
  Biol. Cond. Score
6
6
6*
6
6
6
6
6
   
 
 
 
 
 
 
 
 
5. % MOD. MAYFLIES
3
11
57
18
49
40
71
78
  Ref-Cand
68
60
14
60
22
38
xxx
xxx
  Biol. Cond. Score
0
0
4
0
2
2
6
6
   
 
 
 
 
 
 
 
 
TOTAL BIOLOGICAL
CONDITION SCORE
18
16
28
18
24
18
30
30
% COMPARABILITY TO REFERENCE
60
53
93
60
80
60
 
 
 
1 - Stations 1CC, 2CC, 3WB, and 5UNT compared to R1
Stations 4CC and 6CC compared to R2
* - Dominant taxon with a Hilsenhoff score < 3


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