NC0024911_Report_19871210

NPDES DOCUMENT SCANNINO COVER :MEET
NC0024911
MSD Buncombe County WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Report
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
December 10, 1987
This document is printed on reuse paper - ignore any -
content on the reYerme'tide

Mee-hh15 N RCl� c� �co�M.� 1�
ab-a.A3" 4-1-jav,
MeAite)amce — 12s2_ crt(-acSrthaeg
Dw�c.a�n.�e iy�(z//c/g7
cs,.n.yJ
p4eywv1 ' .h._&Pcsu,,. ava.. Li0
to 424<p60-tc low-.=. tm..,,.,..,..... ,refai-ctkA;t4A,44:
ritt-4/9 areS Ls-4as c4.eS2Q
Q9 v v1` ,
0_0"/VOL tre/aAD (t) r+eic+t4/:/\
0/0 61(6L
NO e--Pit)(04-ti,v1 ititeAA (Q›,4
Q,Z)7,

Craggy Dam Hydro Project
Changes in Habitat * as a Result
of Different Operating Scenarios
Species = Redbreast Sunfish Adult
Minimum Flow in cfs
Month 460 340 220 100
January - 21% - 25% - 30% - 35%
February - 22'/. - 26%. - 30% - 35%
March - 21% - 24%. - 27% - 31%
April - 21% - 247. - 28%. - 32%.
May - 24%. - 28% - 34% - 40%
June - 247. - 30%. - 37%. - 44%
July - 20% - 27% - 34% - 44%
August - 18% - 24'/. - 32% - 42'/.
September - 13% - 20% - 28% - 38%
October - 13% - 20% - 28% - 37%
November - 15% - 21%. - 29% - 38%
December - 20%. - 26%. - 32% - 39%
* As determined by comparing with -project to natural conditions.
The percent represents change in average habitat deficits below
a target of median habitat, by month. Habitats are based on a
time series of median monthly flows.

:-! NTH
!_--1 -S. Et-- f :3�, , i
, ;
i1=C,• E:''L: ff.:F'A«T 1ADL' LT t 'i31"L�'•'i-i a4T DORA 1 Zvit•.
J
tfo
220
GC5
c.
3
100 h
1

=I .11 Tr e — P. i
_L L{
4=�.� 1 '•,# i• 1' 3 1 �Ji ,* . i''�' i i'`�`' i i--- NTH •f I !-_ �`'� `� � ! °•-, i
f: EDL:r:E,4.5i ,4DU LT {- ,41ITAT Cd-!R:tA:i ON
-'I
u _ I 1
-'� 1 -
1
"---0 natural
I
1
I
I
1 i
I
I
I
1
1
I
I
I
I gat) cis
1
-- ---�J. 1 3y0 cis
i
I
I
'-` 2ZO C4
1
1
f
I 1
41 •1
F E :':,EN ' E:<:(1 EEDAN' :�E
1 1
i
roll CA

'90
.50
40
IC F..: A cii 13 Y .... . , Y 'I --- '
F. 4 H 11 i n 1.‘ 1 T H 1-1 F
, _ , J U r\I E:
F.: ECE:ff:E.4-4.75:1 ADU LT HAE:ITAT DI.JR.4711 ON
i
,.-;
gi
, .
Ti7.:::.:......
ir:-,%•:\,'..,-.•
. • , ...„
\ .g... `',......
`.. '..
"'",..................
., .........________
„ ---A A
Ear ''''''' 41
V :
it....
,.........................
',................................
i
1 i
1 1
40
P ET: C E NT Ex:C.: E MANCE
nittufitt
160 cis
3410 cis
220 cts
MO c-4

p A irn y
M 0 NTH OFjUNE
Cli4k.IN EL CATFIFSH AD.) LT HABITAT D'-.J4TIQN
!=i
n 7
t:-•
18 —
1 2
t.
4
PET:C ENTAC3F E
nalwal
,149
100 cfs

State of North Carolina
Depai t►iient of Natural Resources and Community Development
Division of Water Resources
512 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Governor
S. Thomas Rhodes, Secretary
November 25, 1987
Dr. Dilip Mathur, Fisheries Scientist
RMC Environmental Services
1921 River Road - P.O. Box 10
Drumore, Pennsylvania 17518
Re: Craggy Hydro
Dear Dr. Mathur:
John N. Morris
Director
I have enclosed the package of information I discussed
on the phone with Paul Heisey and John Rinehart on November 19
and 23. Included are the results of our time series analysis
using the flow vs habitat relationships developed by RMC. A
description of the methodology is also enclosed.
A meeting has been arranged for the various agencies to
discuss the instream flow study with the Metropolitan Sewerage
District and RMC. It will be held on Thursday, December 10, at
9:00 a.m. in the llth floor conference room of the Archdale
Building in Raleigh. If you feel it is necessary to discuss
technical details prior to this meeting, Steve Reed and I will
be available during the afternoon on December 9. Please contact
one of us if you wish to meet on the 9th or if you need
directions. Feel free to contact me with any questions about the
enclosed material.
Sincerely,
)tll' & q
J.
7.Jim Mead
Environmental Specialist ��a
<21 (d,5,
cc: William Mull, Engineer-Mgr-MSD 1;-(I"
John Wray, Deputy Director, DWR {& ' e)
Steve Reed, DWR �FJ,
Don Baker, WRC -10,
-
Trevor Clements, DEM 5,
Ries Collier, USFWS �'�-
Jim Borawa, WRC
P.O. Rox 27687, Raleigh, North Carolina 27611 7687 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

G.
1(&ii in bw l cad u'€v
T r die Sey►;5 44175.5
G456S Ggle O3/51506
F,evrch 81-,i River al Aim lie
O6Iv1t Ariot
F/avv'S raised 10
Call/ 04)71
//t
by
ti53/9HS
Pe( itad 01 fete✓cl used I 1922 - /2 /98s
DA 7.1 5 con veri'ed info mod A/ or Sian -(/optic) 4'
r y
yea (. 7-/ 5 wits -/,; cedes 7/ u'S Coo tier/cI
-10 uni.4 o-( , b!'T1gf.

Ir�Pi 517
..Cinv14461 IA 4c,„5-
Cfajlx t'
Actor d' �O
hem a h
&lex a015
n Row
O >75q
760 ' /o 9a
1093 -� 1251
* 1264 •' /725
1726 `'17317
17ko -' 2359
2560 ---9
MI v1 Itt%aq. I00 c4
1►:Row
0
1100 7
733
# 100 -�
/ 3Z -�
* HOO -- 7 11
2000 ---, cd
ka,dYer7T" (/JJMe C0,9V ova
- ma/ h. /q����
10 l '# y e / —
II/i/57)
caec,// moo cf te,t
0 633 cif, /p? Jurb,ne
mrra• h dvatliC capez f 01 42 7uvh (v4p!4-i
y y
5 ^ 'o c-6 . r 7 op( (1+4 04,00)
Ater AatAte flow
0
300 —> 6 „ d.hi
633 fixed
(6eA)-!-('3co-z32 %rabble
2)(633-6'iced
fix( 7633 „eM) +"P633 v4061b/e
2 x 6 3 3 4'xeJ) +! 33 variable
Peiia', ?low
O
300 63Z va✓/,bk
633 ,ed
(500 -7 t 33 Aced) + (:V 'l 3 Z Veir.011()
2 x 633 6x d
2x 6506 435 -t 660 --,633 ✓aruht)
(_zx C33 I't I) # G 3 3 Var,Q14
aormIatflOri 'Now
In4w
/00
M16w — 633
/00
1ni4w -(z33)
1ZG
1n w - (13 ( 33)
,/'o a%l/ 11c yet/C4 1 op/4,4 q T 3o7 c aa4c t /y �`v 300 c '��

comparison of different project alternatives, and bases
recommendations on naturally occurring habitat variations, rather
than a single optimal flow.
The basic concept of habitat time series is to select an
historic record of streamflows, and then convert flow into a
record of habitat, using the relationships developed by the
model. Flows for the two sites were generated by a drainage area
ffeticK 8r rd Rkev Ashsvilkt
ratio from the USGS gage on . The flows
converted into habitat are the series of monthly median
discharges during the period from January 10140,to December 1911
'732
MM. observations) . Duration analysis was then performed on this
series of habitat values. The median habitat, or 50% exceedance
value, was selected as the target habitat for each life stage
•
Impact analysis is needed to quantify the amount of habitat
change for each life stage. An example of the second approach to
impact analysis is depicted in Figure 21. First a baseline must
be established. In this case the median habitat target for each
month was used. Then the actual habitat occurring over time is
compared to this baseline. The deficits of habitat values less
than the baseline are totalled for with and without -project
G1
conditions over the years of record. The total deficits are
then compared as a percentage of the mitzhabitatan target. This
percentage change is shown in Tables-9—to
he effect of even the largest alter
discharge on a
e wastewater
edbreast - sh is insignificant. During
the month of great- mpact - - her site, there is a 16%
reductio habitat. Three other months s
-16-
aller reductions

w
FIGURE 21: EXAMPLE OF IMPACT ANALYSIS
REDBREAST SUNFISH JUVENILES
Middle Crk, US 401, 2 Yr Sample Record
(1961-62)
HABITAT 8-
(WUA x 1000)
2
1 i � 1 i t i 1 1 I 1 f211314-115116
1iii1111123456 7 8 9 1011171819 20 22 24
TIME (MONTHS)
KKEY:
Baseline - Median Habitat
* Habitat Deficit with No Project
Additional Deficit with
8 MGD Pro*ect
... Additional Deficit with
12 MOD Protect
Lit Additional Deficit with
18 MGD Pro)ect

OEF2 =
NY, S
E�� asi.0Za.
0BS MONTH
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 10
11 11
12 12
MED
PERCENTAGE CHANGE IN HABITAT
SPECIES - REDBREAST SUNFISH LIFE STAGE - ADULT
STREAM - FRENCH BROAD RIV SITE - CRAGGY DAM
DEFO= NATURAL DEF1= 460 CFS DEF2= 100 CFS
13:29 WEDNESDAY, NOVEMBER 25, 1987 1
DEFO DEF1 DEF2 NYRS TOTALPI TOTALP2
102558 139068 1447454 2350704 61
103652 61
103679 61
103624 61
103192 61
78731 1485015 2291735
40916 1365754 1984858
50152 1358768 2091199
96164 1582186 2630592
MEDP1 MEDP2
-9.408 -15.903 -0.20914 -0.35352
- 17.862 -28.108 -0.22242 -0.35001
- 32.379 -47.511 -0.20948 -0.30737
-26.093 -40.697 -0.20702 -0.32290
- 15.453 -26.355 -0.23607 -0.40263
101404 164626 1627481 2912978 61 -8.886 -16.695 -0.23649 -0.44431
97719 181774 1398958 2780799 61 -6.696 -14.298 -0.20420 -0.43602
96714 219229 1276272 2672587 61 -4.822 -11.191 -0.17917 -0.41585
91382 220736 964325 2347819 61 -3.369 -9.636 -0.13340 -0.38159
94369 332387 1085869 2486498 61 -2.267 -6.481 -0.13089 -0.37420
97384 318633 1225732 2576628 61 -2.847 -7.087 -0.15270 -0.38011
100901 231305 1493442 2653085 61 -5.457 -10.470 -0.20506 -0.39347
meci �1G0�
1 '�1r1 het h lS +4r9 e-1
� DfF0 , 4oft dePc,l 4r occurrences helaw
eed �uhcie✓ 11a4414( C40%d141:0s
IL`!tllrl11�
� 'vied' RaeRae�40 G�S �'luw1 Glse
Q��� -fo�i�i de�ic � �o
r occurrences below me d
a it
100cis
jI !1
1114.tL o"C y€4, e
1! 1+
ire CD
ToTAL.Pi = (DEP, - dFF1)/ OFF,
rcmi,P2 ( DEF,Pl - aF2)1 DEF,
(I4E0 P1 = (&EF# OFF.iYNYRSVMEd
0 �P2 = (( O�F,d — D�'F2)�NYRS)l(!ltit
witive �i4eS , d icae
neg t
loss
s-f A4h,#'1t. &li '
by fop fo VI fa
.rA' _1i'_ 1�_ ..�n.i�...wevN�P V�e 4veY4a vear/ cI14ne
r5P
of frieolay l,4bi'/d iqr 1�.
de'd#s, as a iiirceddle9e

V�4
N PERCENTAGE CHANGE IN HABITAT
SPECIES - REDBREAST SUNFISH LIFE STAGE - JUVI
e•Is‘SNN°*j
STREAM - FRENCH BROAD RIV SITE - CRA66Y DAM
DEFO= NATURAL DEFT= 460 CFS DEF2= 100 CFS
13:43 WEDNESDAY, NOVEMBER 25, 1987 1
0BS MONTH MED DEFO DEF1 DEF2 NYRS TOTALPI TOTALP2 MEDP1 MEDP2
1 1 105829 112920 280722 1228372 61-1.4860 -9.878 -0.025993 -0.17279
2 2 105122 102035 243014 1081403 61-1.3817 -9.598 -0.021985 -0.15273
3 3 103572 95016 147396 793998 61-0.5513 -7.356 -0.008291 -0.11064
4 4 104568 112297 183963 946150 61-0.6382 -7.425 -0.011235 -0.13073
5 5 106159 83205 323928 1428960 61-2.8931 -16.174 -0.037173 -0.20782
6 6 107505 66201 455431 1800352 61-5.8795 -26.195 -0.059354 -0.26444
7 7 107801 62475 469636 1927172 61-6.5172 -29.847 -0.061918 -0.28357
8 8 107783 86338 440568 1904624 61-4.1028 -21.060 -0.053877 -0.27656
9 9 106868 90611 386134 1819211 61-3.2614-19.077 -0.045333 -0.26517
10 10 106726 108194 346087 1777924 61-2.1988 -15.433 -0.036541 -0.25648
11 11 106503 92321 323759 1714498 61-2.5069 -17.571 -0.035624 -0.24969
12 12 106348 71242 336768 1542891 61-3.7271 -20.657 -0.040931 -0.22685

0-‘0M,sysaEGA 10
PERCENTAGE CHANGE IN HABITAT 13:51 WEDNESDAY, NOVEMBER 25, 1987 1
SPECIES - REDBREAST SUNFISH LIFE STAGE -SPAWN-LARVAL
STREAM - FRENCH BROAD RIV SITE - CRAGGY DAM
DEFO= NATURAL DEF1= 460 CFS DEF2= 100 CFS
0BS MONTH MED DEFO DEF1 DEF2 NYRS TOTALP1 TOTALP2 MEDP1 MEDP2
1 1 19069 95272 4208 4208 61 0.95583 0.95583 0.0782869 0.0782869
2 2 18025 76244 4016 4016 61 0.94733 0.94733 0.0656902 0.0656902
3 3 16744 65199 2932 2932 61 0.95503 0.95503 0.0609634 0.0609634
4 4 17568 81762 1267 1267 61 0.98450 0.98450 0.0751133 0.0751133
5 5 19186 73245 0 0 61 1.00000 1.00000 0.0625841 0.0625841
6 6 21409 82801 0 0 61 1.00000 1.00000 0.0634029 0.0634029
7 7 23069 89664 0 0 61 1.00000 1.00000 0.0637176 0.0637176
8 8 23522 88234 1109 1109 61 0.98743 0.98743 0.0607210 0.0607210
9 9 25513 124974 1063 36786 61 0.99149 0.70565 0.0796193 0.0566654
10 10 24578 116222 3491 3491 61 0.96996 0.96996 0.0751912 0.0751912
11 11 23220 121632 4703 4703 61 0.96133 0.96133 0.0825525 0.0825525
12 12 21635 119134 0 0 61 1.00000 1.00000 0.0902712 0.0902712

1.i
00100 N�Q4MS N
PERCENTAGE CHANGE IN HABITAT
SPECIES - SHINER LIFE STAGE - JUVI
STREAM - FRENCH BROAD RIV SITE - CRAGGY DAM
DEFO: NATURAL DEF1: 460 CFS DEF2: 100 CFS
9:24 WEDNESDAY, NOVEMBER 25, 1987 1
0BS MONTH MED DEFO DEF1 DEF2 NYRS TOTALPI TOTALP2 MEDP1 MEDP2
1 1 32 217 48 48 61 0.77880 0.77880 0.086578 0.086578
2 2 34 212 93 93 61 0.56132 0.56132 0.057377 0.057377
3 3 40 284 142 142 61 0.50000 0.50000 0.058197 0.058197
4 4 36 228 133 133 61 0.41667 0.41667 0.043260 0.043260
5 5 31 189 70 70 61 0.62963 0.62963 0.062930 0.062930
6 6 25 97 0 0 61 1.00000 1.00000 0.063607 0.063607
7 7 25 110 0 0 61 1.00000 1.00000 0.072131 0.072131
8 8 24 85 6 6 61 0.92941 0.92941 0.053962 0.053962
9 9 41 458 21 21 61 0.95415 0.95415 0.174730 0.174730
10 10 39 430 28 28 61 0.93488 0.93488 0.168979 0.168979
11 11 33 276 39 39 61 0.85870 0.85870 0.117735 0.117735
12 12 32 240 38 38 61 0.84167 0.84167 0.103484 0.103484
5

f 1
R�P�`C .v
�►M, 0 SPECIES - CHANNEL PERCENTAGE GE IN
CATFISH LIFE STAGE - ADULT
c,���G STREAM - FRENCH BROAD RIV SITE - CRAGGY DAM
DEFO= NATURAL DEF1= 460 CFS DEF2= 100 CFS
12:35 WEDNESDAY, NOVEMBER 25, 1987 1
0BS MONTH MED DEFO DEF1 DEF2 NYRS TOTALP1 TOTALP2 MEDP1 MEDP2
1 1 20984 120866 649469 768033 61-4.3735 -5.3544 -0.41296 -0.50559
2 2 22368 98127 721719 828354 61-6.3549 -7.4417 -0.45703 -0.53518
3 3 24432 109006 789323 870518 61-6.2411 -6.9860 -0.45648 -0.51096
4 4 23105 91715 722735 819409 61 -6.8802 -7.9343 -0.44772 -0.51631
5 5 20839 90949 673334 810079 61-6.4034 -7.9070 -0.45815 -0.56572
6 6 18128 77094 551922 721270 61-6.1591 -8.3557 -0.42939 -0.58254
7 7 16292 74890 439567 620463 61-4.8695 -7.2850 -0.36695 -0.54897
8 8 15791 79912 393013 577615 61-3.9181 -6.2281 -0.32505 -0.51669
9 9 13459 63643 256530 44184E 61 -3.0308 -5.9426 -0.23494 -0.46066
10 10 14623 103874 313316 504251 61-2.0163 -3.8544 -0.23480 -0.44885
11 11 16125 117630 389379 572097 61-2.3102 -3.8635 -0.27627 -0.46203
12 12 17878 101380 511647 666296 61-4.0468 -5.5723 -0.37620 -0.51801

PERCENTAGE CHANGE IN HABITAT
SPECIES - CHANNEL CATFISH LIFE STAGE - FRY
STREAM - FRENCH BROAD RIV SITE - CRAGGY DAM
DEFO= NATURAL DEFT= 460 CFS DEF2: 100 CFS
12:44 WEDNESDAY, NOVEMBER 25, 1987 1
OBS MONTH MED DEFO DEF1 DEF2 NYRS TOTALP1 TOTALP2 MEDP1 MEDP2
1 1 46121 43394 323008 533876 61 -6.444 -11.303 -0.09939 -0.17434
2 2 46425 27474 335245 522870 61-11.202 -18.031 -0.10868 -0.17493
3 3 46780 22386 329963 474434 61 -13.740 -20.193 -0.10779 -0.15841
4 4 46552 21551 318060 488457 61-13.758 -21.665 -0.10442 -0.16442
5 5 46086 29782 339953 585520 61 -10.415 -18.660 -0.11033 -0.19768
6 6 45380 37973 325883 625624 61 -7.582 -15.475 -0.10401 -0.21229
7 7 44502 39388 271732 595134 61 -5.899-14.110 -0.08559 -0.20472
8 8 44263 45279 246065 571650 61 -4.434 -11.625 -0.07436 -0.19495
9 9 43074 42008 176798 497212 61 -3.209 -10.836 -0.05130 -0.17325
10 10 43705 64491 204161 526113 61 -2.166 -7.158 -0.05239 -0.17315
11 11 44423 65737 238702 550441 61 -2.631 -7.373 -0.06383 -0.17887
12 12 45260 51616 300019 569250 61 -4.813 -10.029 -0.08997 -0.18749
}

5\0,0 FOS‘k.)N
PERCENTAGE CHANGE IN HABITAT
SPECIES - CHANNEL CATFISH LIFE STAGE - SPAWN
STREAM - FRENCH BROAD RIV SITE - CRAGGY DAM
DEFO- NATURAL DEF1= 460 CFS DEF2= 100 CFS
12:49 WEDNESDAY, NOVEMBER 25, 1987 1
0BS MONTH MED DEFO DEF1 DEF2 NYRS TOTALP1 TOTALP2 NEDP1 MEDP2
1 1 18910 82819 494368 630338 61-4.9693 -6.611 -0.35678 -0.47465
2 2 19719 62113 534690 655969 61-7.6083 -9.561 -0.39288 -0.49370
3 3 20711 59238 552626 645333 61-8.3289 -9.894 -0.39053 -0.46391
4 4 20074 53726 520916 631228 61-8.6958-10.749 -0.38153 -0.47162
5 5 18819 60887 515813 672933 61-7.4716 -10.052 -0.39629 -0.53316
6 6 17087 57414 447942 641869 61-6.8020 -10.180 -0.37468 -0.56073
7 7 15731 57142 364632 573306 61-5.3812 -9.033 -0.32044 -0.53790
8 8 15361 62671 327742 540084 61-4.2296 -7.618 -0.28289 -0.50950
9 9 13625 53276 225728 437818 61-3.2370 -7.218 -0.20749 -0.46268
10 10 14497 84697 265778 482410 61-2.1380 -4.696 -0.20477 -0.44974
11 11 15607 92115 321416 529431 61-2.4893 -4.748 -0.24086 -0.45935
12 12 16902 76347 413636 590345 61-4.4178 -6.732 -0.32714 -0.49853

PERCENTAGE CHANGE IN HABITAT
SPECIES-SMALLMOUTH BASS LIFE STAGE - ADULT
STREAM - FRENCH BROAD RA/ SITE - CRAGGY DAM
DEFO= NATURAL DEF1= 460 CFS DEF2= 100 CFS
0BS MONTH MED DEFO DEF1 DEF2
1 1 32962 95265 419821 430974
2 2 34397 89913 499582 509116
12:55 WEDNESDAY, NOVEMBER 25, 1987 1
NYRS TOTALP1 TOTALP2 MEDP1 MEDP2
61-3.4069 -3.5239 -0.16142 -0.16696
61-4.5563 -4.6623 -0.19525 -0.19979
3 3 37030 123188 616318 623025 61-4.0031 -4.0575 -0.21831 -0.22128
4 4 35337 94522 530646 539556 61-4.6140 -4.7083 -0.20233 -0.20646
5 5 32827 75020 430652 442804 61-4.7405 -4.9025 -0.17760 -0.18367
6 6 30363 47742 302494 319250 61-5.3360 -5.6870 -0.13754 -0.14659
7 7 29194 43797 231056 249868 61-4.2756 -4.7051 -0.10515 -0.11572
8 8 28875 43904 203340 224702 61-3.6315 -4.1180 -0.09052 -0.10265
9 9 27491 29997 121503 144747 61-3.0505 -3.8254 -0.05457 -0.06843
10 10 28131 52004 154209 180641 61-1.9653 -2.4736 -0.05956 -0.07496
11 11 29088 65271 204594 228681 61-2.1345 -2.5036 -0.07852 -0.09209
12 12 30204 60967 280934 298651 61-3.6080 -3.8986 -0.11939 -0.12900
>

�� ��v\S�c)N
MAN s_VeAcil�o
PERCENTAGE CHANGE IN HABITAT
SPECIES - SMALLMOUTH BASS LIFE STAGE - JUVI
STREAM - FRENCH BROAD RIV SITE - CRAGGY DAM
DEFO: NATURAL DEF1: 460 CFS DEF2: 100 CFS
12:59 WEDNESDAY, NOVEMBER 25, 1987 1
OBS MONTH MED DEFO DEFT DEF2 NYRS TOTALP1 TOTALP2 MEDP1 MEDP2
1 1 79425 102589 730938 800742 61 -6.125 -6.805 -0.12969 -0.14410
2 2 B0622 75918 789101 855324 61 -9.394 -10.266 -0.14502 -0.15848
3 3 80873 53216 747582 797470 61-13.048 -13.986 -0.14075 -0.15086
4 4 80650 55239 736264 796351 61-12.329 -13.416 -0.13843 -0.15064
5 5 80131 88940 814409 893277 61 -8.157 -9.044 -0.14842 -0.16455
6 6 77808 98793 732141 833535 61 -6.411 -7.437 -0.13344 -0.15480
7 7 75485 97984 589924 692611 61 -5.021 -6.069 -0.10684 -0.12914
8 8 74851 106167 529421 637055 61 -3.987 -5.000 -0.09270 -0.11627
9 9 71801 87179 350730 466202 61 -3.023 -4.348 -0.06017 -0.08654
10 10 73373 141616 427350 553413 61 -2.018 -2.908 -0.06384 -0.09201
11 11 75274 156544 523077 639686 61 -2.341 -3.086 -0.07982 -0.10522
12 12 77491 131292 678772 773130 61 -4.170 -4.889 -0.11582 -0.13578

\NORM 1'�ti�
M�N���o �R�v1
PERCENTAGE CHANGE IN HABITAT
SPECIES - SMALLMOUTH BASS LIFE STAGE - FRY
STREAM - FRENCH BROAD RIV SITE - CRAGGY DAM
DEFO= NATURAL DEF1= 460 CFS DEF2= 100 CFS
13:04 WEDNESDAY, NOVEMBER 25, 1987 1
0BS MONTH MED DEFO DEF1 DEF2 NYRS TOTALP1 TOTALP2 MEDP1 MEDP2
1 1 9435 10522 82036 139430 61 -6.797 -12.251 -0.12426 -0.22398
2 2 9818 13997 103588 154384 61 -6.401 -10.030 -0.14959 -0.23441
3 3 9881 13171 99326 138306 61 -6.541 -9.501 -0.14294 -0.20761
4 4 9825 12398 96719 142824 61 -6.801 -10.520 -0.14069 -0.21762
5 5 9664 12560 101565 168203 61 -7.086 -12.392 -0.15098 -0.26402
6 6 9213 7308 82251 163762 61 -10.255 -21.409 -0.13335 -0.27839
7 7 9055 8565 72409 160800 61 -7.454 -17.774 -0.11559 -0.27561
8 8 9012 10756 66508 155738 61 -5.183 -13.479 -0.10142 -0.26373
9 9 8774 11740 52678 140529 61 -3.487 -10.970 -0.07649 -0.24063
10 10 8911 17266 57797 146140 61 -2.347 -7.464 -0.07456 -0.23709
11 11 9040 15737 63471 149013 61 -3.033 -8.469 -0.08656 -0.24169
12 12 9192 10631 75400 149016 61 -6.092 -13.017 -0.11551 -0.24680

0. MAN v��c
tia
S
PERCENTAGE CHANGE IN HABITAT
SPECIES - SMALLMOUTH BASS LIFE STAGE - SPAWN
STREAM - FRENCH BROAD RIV SITE - CRAGGY DAM
DEFO= NATURAL DEFT= 460 CFS DEF2= 100 CFS
13:09 WEDNESDAY, NOVEMBER 25, 1987 1
0BS MONTH MED . DEFO DEF1 DEF2 NYRS TOTALPI TOTALP2 MEDP1 MEDP2
1 1 12094 47776 280790 321476 61 -4.877 -5.729 -0.31585 -0.37100
2 2 12385 31168 292786 329442 61 -8.394 -9.570 -0.34629 -0.39481
3 3 12445 19015 277129 305094 61-13.574 -15.045 -0.34001 -0.37684
4 4 12420 21055 276464 309713 61-12.131 -13.710 -0.33712 -0.38101
5 5 12114 35710 295169 342107 61 -7.266 -8.580 -0.35112 -0.41464
6 6 11308 45471 263852 321902 61 -4.803 -6.079 -0.31659 -0.40075
7 7 10179 40391 194945 256841 61 -3.826 -5.359 -0.24891 -0.34860
8 8 9871 39556 170077 233153 61 -3.300 -4.894 -0.21677 -0.32152
9 9 8564 24709 93184 156535 61 -2.771 -5.335 -0.13108 -0.25234
10 10 9152 43659 123924 189094 61 -1.838 -3.331 -0.14377 -0.26051
11 11 10076 57988 172578 234956 61 -1.976 -3.052 -0.18644 -0.28792
12 12 11154 57085 245460 298344 61 -3.300 -4.226 -0.27686 -0.35459

Men
Firnc� Braa� River - Crag9Y Dan 17s4te4n7 Flow Sf1.,dy
ithri ews WhIdt provide 41 le451
.:•vim . '�
med tan AtbIY4 1'41 /evet5
Q,cct '�O
Species : Reddreas% SHnnqti
it)
Ads 14
Jvoi1'/e
I.,
f0'1'! 336,3
?25- 1914
41- 186
_
b
070 - Z713
•
480 - 2057
,
t
37 - 2067
.
Le
1876 - 2779
6,00 - 2341
31 - 2340
r
v
!eV/ - 2908
6152 - 2/58
36 - 2158
177r - 360
751- 184
'12 - /01/4
?�
I
1'172 - '1033
902 - 155 €
54 - NU
/250 - 480
9115 - 1117/
73 - 126-0
5
1140 --1
142 - 1493
71- 1190
1 ;
924 —7
ell - Dail
_
12Z - 926
wet -.)
795- 17,Zy
97 - Wig
r
1230 - 70 58
77 g - 1772
7q - 1z 3O
,
1112 - Y`l63
745 _ 1806
57 - 11/112
- AbIY.J iiased on man4iy ,rte/4n 14*s
- 4 !! Row win dews 1 i✓en in cis

Fm,cli Bra Nye( - y d,,,n 1ns4iwn Flow Ogiely
,
II rr
1 low Mildews whie44 rOVid��e° a4 l€aa� _¢`I., J.-
--
median 14b1`741 levees y,� .�-"
Species •
1i,'nev'
. • �yyJ�a
trill
J (4 yen? le
livende *
In .
25 - 136-
MIN -1
eh.
25 - 42 6
2050 --)
14r
er
v.__
M�
41_
2S - 8R5
2350 —
25 - qrs
2150 --,
25- - 4Yo
1981 -a,
25 - '1 7o
155, -.--,
_
25 - 170
1S5& -'
ttg.
,
25 - 176
15-00 --›
_
P_..
.4
25 - sio
_
2400 -I'
,
25- - Rao
2300 --2)
,
►V
ZS- - 130
20o0
' -"
c.__
25" - 13 '
bq iy ---,
ie- 4 second rAne a-f *(/ws .,•g4 pwide Otd�an 44/41
bud on ittonfVy .nreP4n laws
— 4l! ROW win�aws j ,(€fl ih cis

man
Fang Bra R,'vei - 6r4g9Y t9a ri fsi54re407 Flow Sfs,dy
riOw 14/�NdewS vVtit�li provide of /CQSf �,�
� �,
o
G
iec,
median 11419r41 levels
Species : Clwnoel CS-4sti
Achill
Jweii:'Ie
Fry
Spawhin9
1
18
18G5 -'9
/i --.7
,�
19
b
2057 -
2057 -',
•
'
Z057 --ry
20 s7
;r _
r
23Y0 -t,
23'j0 -op
Zoo --*
2340 -a,
z158 --3>
2158 --7
2/59 -07
215g —
K
1 m -,
1 sq5- - "
!Pit -.7
1gg1 -"
?.__
1
t q7z --i,
1 P172 -4)
147Z -0
Pin -'
1251 ---v
_
1257 --"
1Z50 --"
12 Si -�
I
11 R0 -�
1l o -*
11 /0 --i?
IMO ---s
gZle --'
126 -,
126 -1
124 - ,
log' q 7
loll -1
10 yg —47
MI/ --*
i
1230 --7
1230 --4,
1230 -- 7
1230 -,
Pillog
1gg2 --'
1Y4Z --*P
lggiZ --�
1'lYZ -ap
- 44bi.I Cased on ',tangly .rkAn 1/a&'s
a!! Row win�aws 9i✓en in cis

mon
Findi 81*e1 R,'vef Crag9Y Dion f'154e4n7 Flow Sfady
rIDW iiheNdewS WW1 proviIe d /eas1 �P
0
SJ0
5
median hablArt levels
Spec : C,1*f/,nt4l1ti Blass
111
.
Ad/AO
JJmik
Fry
Spar/dog
1,
144 -1
l7101 - 3500
I&API - 349/
1035- 3679_
b
Z05-7 -'
1,1(c -- 2 R'l9 '
144(¢ - z R5ii
.
1107 - 3 31/3
Le
2340 -''
14160 - 282y
1'4I -- 2923
206.7 - 3259
r
ggz1 - 2439
1921 - 241Y0
z0/9 -- szvi
Vie ie -"
V
1'if -'>
1836'-3177
1907 -3174
ISN4- 3456
?_
I
1172 -PP
1 I72 - 4332
1472 - 381'f
1172 - y381/
iz51 --*
12r/ - 5742
125/ -IMO/
1251 - 5330
9
I1mo - ai 3z
811 - 'flg'
;pm - 5588
11 gto —)
k
926 -9
/26 - Ct/7Z
IX - 6685
92& --17
10 -1
10'11 -- 71)'I3
loll - *ill
loll - 4111
iR
l z 30 -)
1230 - 5872
123D - #12 3
1230 - SYIG
Am
111 - `l 50 7
11113 ' 3 95/
1 yy 2 - 1/512
--?,
1
h4b,Ytt based on motley irxAn 11414,5
- 4l! dew win�aws qi✓en in c%

Js wt 1.4.3 €.4--- L -1-o
LO
� C r►S
C t p e
s
rclt 5 oc,‘
•
11.42_ („,6 ,0 C„Ic.
n
, g Y,
‘)., Y\at,
V c.
ea-tk-Q- Go —to
s
is 4.4
iv-,49
� (.4,0)CLs1„.41

S
_ C
�a�
,61
4
•
14/0-4-
_ _4,

State of North Carolina
Department of Natural Resources and Community Development
Division of Water Resources
512 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Governor John N. Morris
S. Thomas Rhodes, Secretary Director
November 3, 1987
Mr. Paul Heisey
RMC Environmental Services
1921 River Road - P.O. Box 10
Drumore, Pennsylvania 17518
Re: Craggy Dam IFIM Study
Dear Paul:
This letter is in response to our phone conversation on
November 2, 1987. I have enclosed a copy of the Instream Flow
Group report on smallmouth bass, overlay plots of the preference
curves for velocity and depth, and a listing of the numerical
values we interpolated from the graphs in the IFG report. Please
contact Steve Reed or me if you or Dr. Mathur have any questions
after you reviewed this information.
We need to see the habitat vs. flow relationships yielded by
these alternate suitability indices before we can proceed with
the time series analysis. When we have received these additional
results from RMC, it will take at least 30 days to review them,
perform the time series analysis, and discuss our results with
other agencies. We will continue to be in contact with you as
the review of this study. progresses. Thank you for your
cooperation.
Sincerely,
Jim Mead
Environmental
cc: John Wray, DWR
Steve Reed, DWR
Don Baker, WRC
d Randy Dodd, DEM
Ries Collier, USFWS,
William Mull, Metropolitan Sewerage District
Specialist ce/
40 •
•94/Ch
P.O. Box 27687,' 1 11-7687 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

State of North Carolina
Department of Natural Resources and Community Development
Division of Water Resources
512 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Governor John N. Morris
S. Thomas Rhodes, Secretary Director
October 2, 1987
Mr. William Mull, P.E.
Engineer -Manager
Metropolitan Sewerage District
of Buncombe County
P.O. Box 8969
Asheville, North Carolina 28814
Dear Mr. Mull:
RECEIVED
OCT 5-m��
TECHNICAL SERVICES BRANCH
This is in response to your letter dated September 4, 1987
which requests an interim cut -back in the 460 cfs minimum release
at Craggy dam. We did not intend to give you the impression that
the 460 cfs is based on protecting water quality in the diverted
reach of the natural channel. Rather, it was recommended to
protect aquatic habitat in the natural channel in lieu of a
site -specific study. Our Division is not responsible for water
quality management, although we cooperate closely with the
Division of Environmental Management on the water quality aspects
of instream flow.
We base "desktop" recommendations on flows which have been
historically available at a site, and on the amount and type of
habitat which will be affected. The 460 cfs is the 7 day, 10
year low flow (7Q10) at the site, and is also equalled or
exceeded 99 percent of the time. This Division and the State and
Federal wildlife agencies use the 7Q10 as the lowest minimum
release we will ordinarily recommend in the absence of further
data. We usually stipulate flows higher than the 7Q10, and for
streams in western North Carolina, 20 percent of the average
annual discharge is often recommended. In this case, 20 percent
of the average discharge is 422 cfs.
We have received the report and additional information from
RMC Environmental Services and have begun our review. In our
opinion, additional discussion, clarification, and technical
information may be needed before the consultant's report is
finalized. We expect to be working with the consultant in the
near future to reach a resolution of these issues.
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

Letter to Mr. William Mull, P.E.
October 2, 1987
Page 2
Please feel free to contact Mr. Steve Reed or me if you have
further questions.
Sincerely,
Jim Mead
Environmental Specialist
cc: John Wray, DWR
Steve Reed,DWR
Don Baker, WRC
Jim Borawa,WRC
/Randy Dodd, DEM
Ries Collier, USFWS
Aarne Kauranen, FERC

DIVISION OF ENVIRONMENTAL MANAGEMENT
September 23, 1987
MEMORANDUM
TO: Forrest Westall
Jim Mead
FROM:
THRU :
Randy Dodd Tz.! `.
Trevor Clementsk�'
Steve W. Tedder '�l0(
SUBJECT: Buncombe MSD Minimum Flow
I have performed preliminary model runs to determine the flow in
Buncombe MSD's flume necessary to maintain DO above 5 mg/1 in the flume.
However, hydraulic information is currently lacking for determination of
necessary model inputs. Sensitivity analysis indicates that the necessary
flow ranges from 60 cfs to 80 cfs based on changes in velocity from 0.3 fps
to 0.5 fps. There is also uncertainty in the water depth and the slope of
the flume. Flow measurements taken at 1000 cfs do not aid in hydraulic
input determination, since development of depth and velocity relationships
require measurements at two flows, and this flow is much higher than the
critical flow. Also, field notes made reference to changing flows during
measurement.
If the question of necessary flow in the flume to maintain 5 mg/1 of DO
warrants further attention, it will be necessary to determine flow/velocity
and flow/depth relationships. If field information is required to obtain
these relationships, the following are recommended:
1) Measurements of flow and wetted perimeter at two different flows at
the two transects in the flume. Flows should be measured when
minimum flows are passing through the flume, and water level is not
changing;
2) Measurement (or confirmation) of the water surface slope. It is my
current understanding that the slope is 4.7 feet/mile.
Please note that this analysis is provided for your information and
review as minimum flow requirements are being considered. Any formal con-
sideration of the assimilative capacity of the flume will require further
analysis and designation as surface waters of the state. It will also be
necessary to consider toxicity requirements.
RD:gh
cc: Bill Kreutzberger

(;i--61 10
L Sc4 Sou
LL � a �
c_
_fr,„ 1,
t-1,4,L °Jo

Me ropo�tan ofIVI1/431.-J
Sewerage District
Buncombe County, North Carolina.
W. H. Mull. P.E.. Engineer -Manager
P. O. Box 8969. Asheville. N.C. 28814
Telephone: Area Code 704-254-9646
John S. Stevens. General Counsel
7
E'?;A;''CH
Mr. Jim Mead] i
Environmental Specialist £ `:
Division of Water Resources
Department of Natural Resources &
Community . Development
512 North Salisbury Street
Raleigh, North Carolina 27611
Dear Mr. Mead:
Frank S. Smith Ill. Chairman
M. Leon Williams. Vice-Chasrman
Steven T. Aceto
Wafter T. Batts
Wafter J. Boggs
Charles M. Dent
E. Charles Dyson
M. Wayne c4werds
George E. lvey
Jadue W. Pone
Marvin E. Waocley
• -September 4, 1987
RECE vED
SEP 9 1987
DA/. of Environmental M
e.
Raleigh, N. C.
With reference to our phone conversation over the past two weeks,
this is to reiterate the District's request that the requirement for
discharging a minimum flow of 460 cfs over the dam be modified to
allow & reduced interim (until the final RMC Environmental Services
Report is submitted and approved) discharge of approximately 100 cfs.
As you have advised, the 460 cfs requirement was based on
providing the 7-day, 10 year minimum discharge for water quality
protection. Since our treatment plant discharges into the flume, we
feel that the 460 cfs ' • .' flow should be maintained in the flume
for water quali •rotection. �o <
At least twelve species of fish have been identified in the flume
and tailrace, and with recent riverflows as low as 590 cfs, (August
28, 29, 30) we are concerned that adequate dilution water may not be
available, and a fish kill could result. We have discussed this with
Roy Davis, Regional Supervisor, Asheville Regional Office, Division of
Environmental Management, North Carolina Department of Natural
Resources and Community Development, and he shares our concerns for
water quality, and concurs in our request to increase the flow through
the flume.
With respect to fish protection, you are in receipt of prelimi-
nary analysis fran RMC Environmental Services indicating that a
discharge of 50 cfs over the dam provides an optimum environment for
young small -mouth bass. Data is being developed for channel catfish
and redbreast sunfish, and should be available within a week.

September 4, 1987
Mr. Jim Mcad
Division of Water Resources
Department of Natural Resources & Community Development
Page 2.
We will continue to operate in the manner outlined by your
office, as required by teERC, but respectively request that you re-
consider your requirements at the Parliest possible date, especially,
in light of the information developed by RMC Environmental Services
indicating that a much lower flow over the dam is adequate for fish
protection. The Metropolitan Sewerage District was created to protect
the water quality of the French Broad River, and we cannot continue to
do so if required to operate our hydroelectric facility in the manner
currently prescribed by your office.
Very truly yours,
W. H.! Mull, P.E.
Engineer -Manager
W M/cnr
cc: John Wray, DWR
Steve Reed, DWR
Roy Davis, NCDNR&CD
Frank Smith
Charles Dyson
Jack Stevens
Bill Duke, eERc
bc: Martin Gaynes
Dilip Mathur
Dick Woodruff
R L Cunningham
Bill Morris
L. P. Benton

Discharger
Receiving Stream
MODEL RESULTS
BUNCOMBE MSD
: HYDROPOWER FLUME
The End D.O. is 4.92 mg/1.
The End CBOD is 15.07 mg/1.
The End NBOD is 20.58 mg/1.
SUMMER
V=0.1 D=10 QW=40
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flow
(mg/1) Mi 1epoi nt Reach # (mg/1) (mg/1) (mg/1) (mgd)
Segment 1 4.92 0.30 1
Reach 1 60.00 90.00 4.00 40.00000

*** MODEL SUMMARY DATA ***
Discharger
Receiving Stream HYDROPOWER FLUME
Summer 70,10
Design Temperature': 23.
: BUNCOMBE MSG
Subbasin : 040302
Stream Class: C
Winter 7Q10
ILENGTHI HOPEI VELOCITY I DERTHI Kd I Kd I Ka I Ka I KN I KN I KNR I KNR
I mile I ftjmi 1 fps I ft IdesignI 020° Idesignl @20° !design' 020° design @20°
I I I I I I I I I I I I
Segment 1 I 0.301 3.001 0,100 110.00 10,23 10,20 10,43 I 0.401 0.38 10,30 1 0.38 10.00
Reach 1 1 1 1 1 III I 1 1 1 1
I Flow 1 CBOD ( NBOD 1 D.Q. 1
1 cfs 1 mg/1 1 mg/1 1 mg/1 I
Segment 1 Reach 1
Waste 162.000 1 60.000 1 90.000 1 4.000
HeadwatersI200.000 1 2.000 1 1.000 1 7.720
Tributary I 0.000 1 2.000 1 1.000 1 7.720
* Runoff I 0.000 1 2.000 1 1.000 1 7.720
* Runoff flow is in cfs/mile

Discharger
Receiving Stream
MODEL RESULTS
: BUNCOMBE MSD
: HYDROPOWER FLUME
SUMMER
V=0. 3 D= 1 0 QW=40
The End D.C. is 4.88 mg/1.
The End CBOD is 26.94 mg/1,
The End NBOD is 38.95 mg/1.
WLA WLA WLA
D0 Min CBOD NBOD DO Waste Flow
(mg/1) Mi lepoi nt Reach it (mg/1) (mg/1) (mg/1) (mgd)
Segment 1 4.88 0.30 1
Reach 1 60.00 90.00 4.00 40.00000

Discharger
Receiving Stream
MODEL RESULTS
: BUNCOMBE MSD
HYDROPOWER FLUME
SUMMER
V=0.5 D=10 QW=40
The End D .O. is 4.97 mg/1.
The End CBOD is 31.20 mg/1.
The End NBOD is 451.59 mg/1.
Segment 1
Reach 1
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flow
(mg/1) Mi 1 epoi nt Reach # (mg/1) (mg/1) (mg/1) (mgd)
4.97
0.30 1
60.00 90.00 4.00 40.00000