NC0040797_Instream Assessment_19940114

NPDES DOCUMENT !MANNINO COVER SHEET
NPDES Permit:
NC0040797
Henry Fork WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
_..._ ....._......e......,,,,....„
47-164;tream Assessment (67135'\
../
Speculative Limits
Environmental Assessment (EA)
Document Date:
January 14, 1994
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DIVISION OF ENVIRONMENTAL MANAGEMENT
January 14, 1994
MEMORANDUM
TO: Rex Gleason
THROUGH: Ruth Swanek a
Carla Sanderson
FROM: Jason C. Doll
SUBJECT: Instream Assessment City of Hickory, Henry Fork WWTP
NPDES No. NC0040797
Catawba County
EMC WQ -93-024
Summary and Recommendations:
The Technical Support Branch has completed the instream assessment for the City
of Hickory, Henry Fork WWTP. The City is requesting an increase in domestic flow of
0.28 MGD and relaxed BOD5, TSS and Chronic Toxicity limits. With the addition of 0.28
MGD flow to the average yearly flow of 3.6235 MGD, the plant will reach a flow of
3.9035 MGD, which is below its current design capacity (6.0 MGD). The Mooresville
Regional Office has recommended a BOD5 limit of 45 mg/1 and a TSS limit of 45 mg/l.
Aquatic Toxicology has recommended a quarterly Full Range Chronic Toxicity Test
(Ceriodaphnia) at effluent dilutions of 13%, 19.5%, 26%, 39% and 52%.
A Level-B analysis was performed to assess the impact of the additional flow and
relaxed BOD5 limit. The modeling analysis for this assessment indicates that the additional
waste flow under the proposed interim limits will not cause a violation of the EMC 67 (b)
criteria (not causing a DO sag of greater than 0.5 mg/I and not extending the DO sag length
greater than 0.5 miles). The currently requested flow increase and limits did not cause a
violation of the 5.0 mg/I instream DO standard, but did lower DO to 5.02 mg/1 (TABLE 1).
Any additional flow increases would be likely to cause violations of the standard.
Technical Support concurs with the recommendations of Aquatic Toxicology and
the MRO with regard to flow and limits. All other limits during the SOC should remain the
same as required in the permit issued December 1, 1993. The existing permit requires the
facility to conduct instream monitoring for Temperature, DO, Fecal Coliform, Conductivity
and Color. Their permit requires two downstream monitoring sites at State Road #1143 in
the Henry Fork River and at Highway 10 in the South Fork Catawba River. The instream
data should be tracked closely during the SOC period in order to confirm the results of the
modeling analysis. The lowest point in the DO sag actually occurs between the two
downstream sites at the mouth of the Henry fork River.

4
Background Information:
The City of Hickory, Henry Fork WWTP discharges into the Henry Fork River, a
class C stream, which flows to the South Catawba River in Catawba County directly south
of Hickory. The river drains approximately 102 square miles at the discharge site. Using
the hydrologic regional equations developed by the USGS and a weighted average with an
upstream flow gage site the following flows were calculated at the discharge site: summer
7Q10 = 26.4 cfs, winter 7Q10 = 38.5 cfs, and average flow = 122.4 cfs. The creek is
slow moving with a stream bed gradient of about 3-4 feet per mile.
The Henry Fork WWTP was originally permitted in 1978, but since 1988 has had
consistent and ongoing compliance problems. Civil penalties have been assessed against
the facility twice in 1993 for repeated prior violations of permit limits. The plant has had
problems meeting BOD5 limits due to the routine mechanical failure of several RBC units
and problems meeting TSS limits because the contract hauler has been unable to remove
sufficient sludge volumes from the plant, where storage capacity is inadequate to meet
needs during longer durations of inclement weather. The problems with effluent toxicity
have been attributed to high TRC levels caused by the lack of sufficient holding time in the
poorly designed chlorine contact basin and an inability to pace chlorination / dechlorination
activities with flow. On December 1, 1993 the City received a permit modification
allowing them to increase the design flow at Henry Fork from 6.0 to 9.0 MGD and convert
to an activated sludge system, but to date they have no Authorization to Construct in house
for the upgrades and expansion. The pending upgrade to an activated sludge facility with a
new chlorine contact basin should alleviate most or all of the compliance problems.
Analysis and Discussion:
An instream assessment was performed using the Level B framework. A
comparison was made using the monthly average flow for the past year (3.6235 MGD) and
the monthly average flow for the past year plus the requested increase in domestic flow
(3.9035 MGD). Both model runs were performed with the requested BOD5 limit of 45
mg/1. Ammonia was modeled with values at the permitted limit of 9.0 mg/l. The BOD5
and NH3-N parameters were input to the model as CBOD and NBOD using multipliers of
2.0 for BOD5 and 4.5 for NH3-N. The DO in the pre-SOC flow model was 0.1 to 0.14
mg/1 higher than in the model run with the additional flow requested (TABLE 1).
cc: Kent Wiggins
John Leslie - MR0
Central Files
4

TABLE 1. Instream Assessment Summary for the Henry Fork WWTP.
Waste flow Assumptions
Design Capacity
Pre-SOC (12/92 - 11/93)
SOC Flow Requested
Pre-SOC + SOC Flow
Model Input Summary
Headwater conditions:
6.0000 MGD
3.6235 MGD
0.2800 MGD
3.9035 MGD
7Q10 26.4 cfs
Qavg 122.4 cfs
Design Temperature 25.0 °C
CBOD 2.0 mg/1
NBOD 1.0 mg/1
DO 7.44 mg/I
Wastewater Inputs:
1st Waste flow
2nd Waste flow
CBOD (2.0*BOD5)
NBOD (4.5*N1I3-N)
Model Output Summary
3.6235 MGD
3.9035 MGD
90.0 mg/1
40.5 mg/I
Qw DO Net Distance Net
(MGD) Min. Change <5.0 mg/1 Change
(mg/1) (mg/1) (m1) (m1)
3.6235 5.16 NA NA NA
3.9035 5.02 0.14 NA NA
4

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REQUEST FORM FOR INSTREAM ASSESSMENT FOR 67b SOC
NAME OF FACILITY: Hickory Henry Fork WWTP
COUNTY: Catawba REGION: MR0
RECEIVING STREAM: Henry Fork River
BACKGROUND DATA:
A. Why is SOC needed?
DESIGN FL W: 6.0 MGD
SUBBAS1 N: 03-08-35
1 0
The facility has failed to meet NPDES Permit lipitations for
TSS, BOD, and Toxicity. TSS violations are relatedlto poor
design of the secondary clarifiers and chorine contact chamber.
BOD violations have been shown to be related to repeated mechanical
failure of a significant number of RBC units. Toxicity is most
likely occurring because of excessive TRC concentrations. High TRC
concentrations are maintained because of insufficient detention
time in the chlorine contact chamber.
B. History of SOC requests:
No SOCs have been requested for the facility.
1. Monthly average waste flow prior to any SOC:
3.6235 MGD
Time period averaged: 92/12 - 93/11
2. Previously approved SOC's-: N/A
3. Flows lost from plant (facilities that have gone
off line): N/A
4. Current SOC Flow request: 280,000 gpd
5. Total plant flow post-SOC (sum of original flow
and SOC flow minus losses): 3.9035 MGD
6. Is this an accurate flow balance for plant?
Yes

Hickory Henry Fork WWTP
Instream Assessment
Page 2
CURRENT SOC REQUEST:
A. Request is for domestic or industrial waste? If it is
a combination, please specify percentages.
Domestic
B. What type of industry? NA
C. The region proposes the following SOC limits:
BOD 45 mg/1 monthly average 60 mg/1 weekly average
TSS 45 mg/1 monthly average 60 mg/1 weekly average
Full Range Chronic Toxicity Test at dilutions of
13%, 19.5%, 26%, 39%, and 52%.
D. What is the basis for these limits?
Review of self -monitoring reports and interim limit
suggestions from HDR Engineering of North Carolina, Inc., the
City's consulting engineer.

SUMMER
MODEL RESULTS
Discharger : HICKORY - HENRY FORK WWTP
Receiving Stream : HENRY FORK RIVER
The End D.O. is 5.80 mg/1.
The End CBOD is 7.97 mg/1.
The End NBOD is 3.08 mg/1.
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flo
(mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) Ong(11
Segment 1 5.70 2.60 3
Reach 1 90.00 40.50 5.00 3.62350
Reach 2 0.00 0.00 0.00 0.00000
Reach 3 0.00 0.00 0.00 0.00000
Segment 2 7.19 0.00 1
Reach 1 31.50 72.00 5.00 0.00750
Segment 3 5.16 1.40 2
Reach 1 0.00 0.00 0.00 0.00000
Reach 2 0.00 0.00 0.00 0.00000
Reach 3 0.00 0.00 0.00 0.00000

SUMMER
I Seg #
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
I
Reach # I Seg Mi I D.O.
1 0.00 7.01
1 0.10 6.93
1 0.20 6.86
1 0.30 6.78
1 0.40 6.71
1 0.50 6.64
1 0.60 6.57
1 0.70 6.51
1 0.80 6.44
1 0.90 6.38
1 1.00 6.32
1 1.10 6.27
1 1.20 6.21
1 1.30 6.16
2 1.30 6.19
2 1.35 6.17
2 1.40 6.15
2 1.45 6.12
2 1.50 6.10
3 1.50 6.11
3 1.60 6.07
3 1.70 6.03
3 1.80 5.98
3 1.90 5.94
3 2.00 5.91
3 2.10 5.87
3 2.20 5.83
3 2.30 5.80
3 2.40 5.76
3 2.50 5.73
3 2.60 5.70
1 0.00 7.19
1 0.05 7.25
1 0.10 7.32
1 0.15 7.37
1 0.20 7.42
1 0.25 7.47
1 0.30 7.51
1 0.35 7.55
1 0.00 5.71
1 0.10 5.66
1 0.20 5.61
1 0.30 5.56
1 0.40 5.52
1 0.50 5.47
1 0.60 5.43
1 0.70 5.39
1 0.80 5.35
1 0.90 5.31
1 1.00 5.27
2 1.00 5.30
2 1.05 5.28
2 1.10 5.26
2 1.15 5.24
2 1.20 5.22
2 1.25 . 5.21
I CBOD
17.44
17.36
17.29
17.22
17.15
17.08
17.00
16.93
16.86
16.79
16.72
16.65
16.58
16.51
16.12
16.09
16.05
16.02
15.99
15.82
15.75
15.69
15.63
15.56
15.50
15.43
15.37
15.31
15.24
15.18
15.12
5.07
4.82
4.59
4.38
4.20
4.03
3.87
3.73
15.07
15.00
14.94
14.87
14.81
14.75
14.68
14.62
14.56
14.49
14.43
14.29
14.26
14.23
14.20
14.17
14.14
I NBOD
7.93
7.88
7.83
7.78
7.74
7.69
7.64
7.59
7.55
7.50
7.45
7.41
7.36
7.32
7.15
7.12
7.10
7.08
7.06
6.99
6.95
6.90
6.86
6.82
6.78
6.74
6.70
6.66
6.62
6.57
6.54
8.39
7.77
7.22
6.73
6.29
5.90
5.54
5.22
6.53
6.49
6.44
6.40
6.36
6.32
6.28
6.24
6.20
6.16
6.12
6.06
6.04
6.02
6.00
5.98
5.96
I Flow I
32.02
32.03
32.05
32.06
32.08
32.09
32.11
32.12
32.14
32.15
32.17
32.18
32.20
32.21
33.11
33.12
33.13
33.13
33.14
33.54
33.56
33.57
33.59
33.60
33.62
33.63
33.65
33.66
33.68
33.69
33.71
0.11
0.12
0.13
0.13
0.14
0.15
0.15
0.16
33.87
33.88
33.90
33.91
33.93
33.94
33.96
33.97
33.99
34.00
34.02
34.42
34.42
34.43
34.44
34.45
34.45

3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
I Seg #
2 1.30 5.19 14.11 5.94 34.46
2 1.35 5.17 14.08 5.92 34.47
2 1.40 5.16 14.05 5.90 34.48
3 1.40 5.96 9.81 4.18 53.18
3 1.60 5.94 9.73 4.13 53.28
3 1.80 5.91 9.65 4.08 53.38
3 2.00 5.89 9.57 4.03 53.48
3 2.20 5.88 9.49 3.98 53.58
3 2.40 5.86 9.41 3.93 53.68
3 2.60 5.85 9.33 3.88 53.78
3 2.80 5.83 9.25 3.83 53.88
3 3.00 5.82 9.18 3.79 53.98
3 3.20 5.81 9.10 3.74 54.08
3 3.40 5.80 9.02 3.69 54.18
3 3.60 5.80 8.95 3.65 54.28
3 3.80 5.79 8.88 3.60 54.38
3 4.00 5.78 8.80 3.56 54.48
3 4.20 5.78 8.73 3.52 54.58
3 4.40 5.78 8.66 3.47 54.68
3 4.60 5.78 8.59 3.43 54.78
3 4.80 5.78 8.52 3.39 54.88
3 5.00 5.78 8.45 3.35 54.98
3 5.20 5.78 8.38 3.31 55.08
3 5.40 5.78 8.31 3.27 55.18
3 5.60 5.78 8.24 3.23 55.28
3 5.80 5.79 8.17 3.19 55.38
3 6.00 5.79 8.10 3.15 55.48
3 6.20 5.80 8.04 3.11 55.58
3 6.40 5.80 7.97 3.08 55.68
Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I

*** MODEL SUMMARY DATA ***
Discharger : HICKORY - HENRY FORK WWTP Subbasin : 0308
Receiving Stream : HENRY FORK RIVER Stream Class: C.
Summer 7Q10 : 26.4 Winter 7Q10 : 38.5
Design Temperature: 25.0
ILENGTHI SLOPE' VELOCITY 1 DEPTH' Kd I Kd I Ka 1 Ka I KN I KN I KNR I KNR I SOD I SOD
mile I ft/mil fps 1 ft ldesignl @20 ldesignl 20 'design' @20 'design' @20 'design' @20
1 1 1 1 1 1 1 1
Segment 1 1 1.301 4.101 0.468 1 2.14 1 0.29 1 0.23 1 1.88 1 1.691 0.44 1 0.30 1 0.44 1 0.00 1 0.00 1 0.00
Reachil 1 1 1 1 1 1 1 1
1 1 1 1 I 1 1 1
Segment 1 1 0.201 4.101 0.470 1 2.17 1 0.29 1 0.23 1 1.89 1 1.701 0.44 I 0.30 I 0.44 1 0.00 1 0.00 1 0.00
Reach2l 1 1 1 I 1 l 1 1
1 1 1 1 1 1 1 1
Segment 1 1 1.101 4.101 0.472 1 2.18 1 0.29 1 0.23 1 1.90 1 1.701 0.44 1 0.30 I 0.44 1 0.00 1 0.00 I 0.00
Reach3I 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1
Segment 2 1 0.351 50.001 0.094 1 0.31 1 0.48 1 0.38 1 9.46 1 8.491 0.73 1 0.50 1 0.73 1 0.00 1 0.00 1 0.00
Reachil 1 I l 1 1 1 1 1
1 1 I 1 1 1 1
Segment 3 1 1.001 3.101 0.437 1 2.28 1 0.28 1 0.22 1 1.33 1 1.191 0.44 10.30 1 0.44 1 0.00 I 0.00 1 0.00
Reachll 1 1 I 1 1 1 1 1
1 1 1 l 1 1 1 1
Segment 3 I 0.401 3.101 0.438 1 2.29 1 0.28 1 0.22 I 1.33 1 1.191 0.44 1 0.30 1 0.44 I 0.00 1 0.00 1 0.00
Reach2l 1 1 1 1 1 1 l 1
Segment
Reach
11 1 1 1
5'.001 3.101 0.494 1 2.71 1 0.28 1 0.22 1 1.50 I 1.351 0.44 I 0.30 1 0.44 1 0.00 1 0.00 I 0.00
1 11 1 1 1
Flow 1 CBOD l NBOD 1 D.O. I
cfs 1 mg/1 1 mg/1 1 mg/1 I
Segment 1 Reach 1
Waste 1 5.616 1 90.00.0 1 40.500 1 5.000
Headwatersl 26.400 1 2.000 1 1.000 1 7.440
Tributary 1 0.000 l 2.000 1 1.000 1 7.440
* Runoff 1 0.150 I 2.000 1 1.000 1 7.440
Segment 1 Reach 2
Waste 1 0.000 1 0.000 1 0.000 1 0.000
Tributary I 0.900 1 2.000 1 1.000 1 7.440
* Runoff 1 0.150 1 2.000 1 1.000 1 7.440

Segment 1 Reach 3
Waste I 0.000 1 0.000 1 0.000 1 0.000
Tributary 1 0.400 1 2.000 1 1.000 1 7.440
* Runoff 1 0.150 1 2.000 1 1.000 1 7.440
Segment 2 Reach 1
Waste 1 0.012 1 31.500 1 72.000 1 5.000
Headwatersl 0.100 1 2.000 1 1.000 1 7.440
Tributary 1 0.000 1 2.000 1 1.000 1 7.440
* Runoff 1 0.140 1 2.000 1 1.000 1 7.440
Segment 3 Reach 1
Waste 1 0.000 1 0.000 1 0.000 1 0.000
Headwatersl 28.600 1 2.000 1 1.000 1 7.440
Tributary 1 0.000 1 2.000 1 1.000 1 7.440
* Runoff 1 0.150 1 2.000 1 1.000 1 7.440
Segment 3 Reach 2
Waste 1 0.000 1 0.000 1 0.000 1 0.000
Tributary 1 0.400 1 2.000 1 1.000 1 7.440
* Runoff 1 0.150 1 2.000 1 1.000 1 7.440
Segment 3 Reach 3
Waste 1 0.000 1 0.000 1 0.000 1 0.000
Tributary 1 18.700 1 2.000 1 1.000 1 7.440
* Runoff 1 0.500 1 2.000 1 1.000 1 7.440
* Runoff flow is in cfs/mile

SUMMER
MODEL RESULTS
Discharger : HICKORY - HENRY FORK WWTP
Receiving Stream : HENRY FORK RIVER
The End D.O. is 5.69 mg/1.
The End CBOD is 8.43 mg/1.
The End NBOD is 3.25 mg/1.
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flo
(mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) (LIO)
Segment 1 5.60 2.60 3
Reach 1 90.00 40.50 5.00 3.90350
Reach 2 0.00 0.00 0.00 0.00000
Reach 3 0.00 0.00 0.00 0.00000
Segment 2 7.19 0.00 1
Reach 1 31.50 72.00 5.00 0.00750
Segment 3 5.02 1.40 2
Reach 1 0.00 0.00 0.00 0.00000
Reach 2 0.00 0.00 0.00 0.00000
Reach 3 0.00 0.00 0.00 0.00000

SUMMER
I Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I
1 1 0.00 6.99 18.41 8.36 32.45
1 1 0.10 6.90 18.33 8.31 32.47
1 1 0.20 6.82 18.26 8.26 32.48
1 1 0.30 6.74 18.18 8.21 32.50
1 1 0.40 6.67 18.10 8.16 32.51
1 1 0.50 6.59 18.03 8.11 32.53
1 1 0.60 6.52 17.96 8.06 32.54
1 1 0.70 6.45 17.88 8.01 32.56
1 1 0.80 6.39 17.81 7.97 32.57
1 1 0.90 6.32 17.73 7.92 32.59
1 1 1.00 6.26 17.66 7.87 32.60
1 1 1.10 6.20 17.59 7.82 32.62
1 1 1.20 6.14 17.51 7.77 32.63
1 1 1.30 6.09 17.44 7.73 32.65
1 2 1.30 6.12 17.03 7.55 33.55
1 2 1.35 6.10 16.99 7.52 33.55
1 2 1.40 6.07 16.96 7.50 33.56
1 2 1.45 6.04 16.92 7.48 33.57
1 2 1.50 6.02 16.89 7.46 33.58
1 3 1.50 6.04 16.71 7.38 33.98
1 3 1.60 5.99 16.64 7.33 33.99
1 3 1.70 5.94 16.58 7.29 34.01
1 3 1.80 5.90 16.51 7.25 34.02
1 3 1.90 5.86 16.44 7.20 34.04
1 3 2.00 5.82 16.37 7.16 34.05
1 3 2.10 5.78 16.31 7.12 34.07
1 3 2.20 5.74 16.24 7.07 34.08
1 3 2.30 5.70 16.18 7.03 34.10
1 3 2.40 5.67 16.11 6.99 34.11
1 3 2.50 5.63 16.04 6.95 34.13
1 3 2.60 5.60 15.98 6.91 34.14
2 1 0.00 7.19 5.07 8.39 0.11
2 1 0.05 7.25 4.82 7.77 0.12
2 1 0.10 7.32 4.59 7.22 0.13
2 1 0.15 7.37 4.38 6.73 0.13
2 1 0.20 7.42 4.20 6.29 0.14
2 1 0.25 7.47 4.03 5.90 0.15
2 1 0.30 .7.51 3.87 5.54 0.15
2 1 0.35 7.55 3.73 5.22 0.16
3 1 0.00 5.61 15.92 6.90 34.30
3 1 0.10 5.56 15.85 6.85 34.32
3 1 0.20 5.50 15.79 6.81 34.33
3 1 0.30 5.45 15.72 6.76 34.35
3 1 0.40 5.41 15.65 6.72 34.36
3 1 0.50 5.36 15.59 6.68 34.38
3 1 0.60 5.31 15.52 6.63 34.39
3 1 0.70 5.27 15.45 6.59 34.41
3 1 0.80 5.23 15.39 6.55 34.42
3 1 0.90 5.18 15.32 6.51 34.44
3 1 1.00 5.14 15.26 6.46 34.45
3 2 1.00 5.17 15.11 6.40 34.85
3 2 1.05 5.15 15.07 6.38 34.86
3 2 1.10 5.13 15.04 6.36 34.87
3 2 1.15 5.11 15.01 6.34 34.87
3 2 1.20 5.10 14.98 6.32 34.88
3 2 1.25 5.08 14.95 6.30 34.89

3 2 1.30 5.06 14.92 6.28 34.90
3 2 1.35 5.04 14.88 6.26 34.90
3 2 1.40 5.02 14.85 6.24 34.91
3 3 1.40 5.87 10.37 4.41 53.61
3 3 1.60 5.84 10.28 4.36 53.71
3 3 1.80 5.82 10.20 4.30 53.81
3 3 2.00 5.80 10.11 4.25 53.91
3 3 2.20 5.78 10.03 4.20 54.01
3 3 2.40 5.76 9.95 4.15 54.11
3 3 2.60 5.74 9.86 4.10 54.21
3 3 2.80 5.73 9.78 4.05 54.31
3 3 3.00 5.72 9.70 4.00 54.41
3 3 3.20 5.70 9.62 3.95 54.51
3 3 3.40 5.69 9.54 3.90 54.61
3 3 3.60 5.69 9.46 3.86 54.71
3 3 3.80 5.68 9.39 3.81 54.81
3 3 4.00 5.67 9.31 3.76 54.91
3 3 4.20 5.67 9.23 3.72 55.01
3 3 4.40 5.67 9.16 3.67 55.11
3 3 4.60 5.66 9.08 3.63 55.21
3 3 4.80 5.66 9.01 3.58 55.31
3 3 5.00 5.66 8.93 3.54 55.41
3 3 5.20 5.66 8.86 3.50 55.51
3 3 5.40 5.66 8.79 3.46 55.61
3 3 5.60 5.67 8.71 3.41 55.71
3 3 5.80 5.67 8.64 3.37 55.81
3 3 6.00 5.67 8.57 3.33 55.91
3 3 6.20 5.68 8.50 3.29 56.01
3 3 6.40 5.69 8.43 3.25 56.11
I Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I

*** MODEL SUMMARY DATA ***
Discharger : HICKORY - HENRY FORK WWTP Subbasin : 0308
Receiving Stream : HENRY FORK RIVER Stream Class: C
Summer 7Q10 : 26.4 Winter 7Q10 : 38.5
Design Temperature: 25.0
'LENGTH' SLOPE' VELOCITY 1 DEPTH' Kd 1 Kd 1 Ka I Ka I KN I KN I KNR I KNR 1 SOD 1 SOD
mile 1 ft/mil fps 1 ft Idesignl @20 'design' @20 'design' @20 'design' @20 'design' @20
1
Segment 1 1 1.301 4.101 0.472 1 2.14 1 0.29 1 0.23 1 1.90 1 1.701 0.44 1 0.30 I 0.44 1 0.00 I 0.00 1 0.00
Reach 1
1
Segment 1 I 0.201 4.101 0.475 1 2.17 1 0.29 1 0.23 I 1.91 I 1.711 0.44 I 0.30 1 0.44 1 0.00 1 0.00 1 0.00
Reach 2
Segment 1 1 1.101 4.101 0.477 1 2.18 1 0.29 1 0.23 1 1.92 1 1.72' 0.44 1 0.30 1 0.44 1 0.00 1 0.00 I 0.00
Reach 3
Segment 2 1 0.351 50.00' 0.094 1 0.31 1 0.48 1 0.38 1 9.46 1 8.491 0.73 1 0.50 1 0.73 1 0.00 1 0.00 1 0.00
Reach 1
1
Segment 3 1 1.001 3.101 0.441 2.28 0.28 0.22 1.34 1.201 0.44 0.30 0.44 0.00 10.0010.00
Reachil 1 1 1 1 1 1 1 1
1.1 1 1
Segment 3 1 0.401 3.10' 0.442 1 2.29 1 0.28 1 0.22 1 1.34 1 1.211 0.44 1 0.30 1 0.44 1 0.00 1 0.00 1 0.00
Reach2l 1 1 1 1 1 1 1 1
Segment 3 1 5.001 3.101 0.497 2.71 0.28 0.22 1.51 1.351 0.44 0.30 0.44 0.00 0.00 0.00
Reach3l 1 1 1 1 1 1 1 1
Flow 1 CBOD 1 NBOD 1 D.O. I
cfs 1 mg/1 1 mg/1 1 mg/1 I
Segment 1 Reach 1
Waste 1 6.050 1 90.000 1 40.500 1 5.000
Headwatersl 26.400 1 2.000 1 1.000 1 7.440
Tributary 1 0.000 1 2.000 1 1.000 1 7.440
* Runoff 1 0.150 1 2.000 1 1.000 1 7.440
Segment 1 Reach 2
Waste 1 0.000 1 0.000 1 0.000 1 0.000
Tributary 1 0.900 1 2.000 1 1.000 1 7.440
* Runoff 1 0.150 1 2.000 1 1.000 1 7.440

Segment 1 Reach 3
Waste I 0.000 1 0.000 1 0.000 1 0.000
Tributary I 0.400 1 2.000 1 1.000 1 7.440
* Runoff 1 0.150 1 2.000 1 1.000 1 7.440
Segment 2 Reach 1
Waste 1 0.012 1 31.500 72.000 1 5.000
Headwatersl 0.100 1 2.000 1 1.000 1 7.440
Tributary 1 0.000 1 2.000 1 1.000 1 7.440
* Runoff 1 0.140 1 2.000 1 1.000 1 7.440
Segment 3 Reach 1
Waste 1 0.000 1 0.000 1 0.000 1 0.000
Headwatersl 28.600 1 2.000 1 1.000 1 7.440
Tributary 1 0.000 1 2.000 1 1.000 1 7.440
* Runoff 1 0.150 1 2.000 1 1.000 1 7.440
Segment 3 Reach 2
Waste 1 0.000 1 0.000 1 0.000 1 0.000
Tributary 1 0.400 1 2.000 1 1.000 1 7.440
* Runoff 1 0.150 1 2.000 1 1.000 1 7.440
Segment 3 Reach 3
Waste 1 0.000 1 0.000 1 0.000 1 0.000
Tributary 1 18.700 1 2.000 1 1.000 1 7.440
* Runoff 1 0.500 1 2.000 1 1.000 1 7.440
* Runoff flow is in cfs/mile

= cp-,s/yyl z
Ptinfy KriC
7CM> So
0A-110,5
czA O./A,
/0 =
qt,3
M 46/"C4V) ern 17
bA= i4q,
GM=
cy6.0 rfij
014ff
-
-7&()=-- 11. 7
-7Q1Ctol ;4-7 7
Re/Hy ro* 0115
_Q
003: 3."--4•
—17
OR - 1C)2-?viji
\
QA z 12,2 • -1
7alo
yet
Ofi= 10•;-
-7c2106 • -24,7
31.c,
tx„c„4),
011-7 111.7
Q14
41c1 4.7
-76,0.0- (41,7
R0064) r o,13
po(70,I0) = 5,
i26 (70_ 100) z 0,A0
11
Grchk*at ‘6,
0.00-76 "riga
• -; 0.54 nir2
fos
WI,: 045
so,o
5: /;- 010„;
tA
0.1471"T
-'
QA 2
-70)0„ 0,7

MODEL INPUTS FOR LEVEL B ANALYSIS
GENERAL INFORMATION
Facility Name:
i-lickory - Oa)
ty 1.-9rk
LAIA-)TP
NPDES No.:
A)G00 10-7q7
i
Type of Waste:
Vo ,i) a trl e-5
tic / 33 A
_2-4 dik-str-\14(
Facility Status:
.8k / 0 !bil /5.0C
Receiving Stream:
H e,r1 ry"-i '.)4
ki)e-t-
Stream Classification:
C I
Subbasin:
03-of- ,35
County:LOsiO‘k,
Regional Office:
M oor c-;5 1,) tile-
Topo Quad:
FLOW INFORMATION
USGS 4/
tloqi -e,
,e.,,,,-rt 11-0
-&D
I
Date of Flow Estimates:
eic) /
eol
s)d.i-srs-71. s•
Drainage Area (mi2):
/ . 0
Summer 7Q10 (cfs):
2.(sss ti
Winter 7Q10 (cfs):
31. 6
Average Flow (cfs):
/.207.
30Q2 (cfs):
IWC at Point of Discharge (%):
Cummulative IWC (%):
:.'''...iAiftfv.::'.. ..,-.4:,::',:mii•::::M.We'....::e: .:
....:A‘liviiN. .••••,0•,,, • ... :f.::•.....Ai:v..g.,,.:-
.. .
....:
MODEL INPUT INFORMATION
LENGTH OF REACH (miles)
/ . 3 At ;
C5 . P-.
/ s /
INCREMENTAL LENGTH (miles) .
0, 1
b . 05
6 . I
WASTE CHARACTERISTICS
FLOW (MGD) .5oc,
3, 6.235
CBOD (mg/1)
NBOD (mg/1)
/0. 5.
D.O. (mg/1)
.5-. 0
RUNOFF CHARACTERISTICS
7Q10 (cfs/tni2) z,.,vrt m e--1
Os l'
O. IS
QA (cfs/nn12)
0.-73
0,73
0 .73
CBOD (mg/1)
01. Of)
..2.0.0
2.06
NBOD (mg/1)
/ • °O
/. 4> 0
l• 00
D.O. (mg/1)
de.Pa ,t /4
elJa.4.1.4
id-rvi,,,4 H-
TRIBUTARY CHARACTERISTICS
7Q10 (cfs)
0.9
O. q
QA (cfs)
CBOD (mg/1)
a .15 0
NBOD (mg/1)
/. 00
/. 00
D.O. (mg/1)
04...,Fexa hi-
44..Fas.4
SLOPE (fpm)
qs I
14. I ,
(.4 /
Name of facii;%'

MODEL INPUTS FOR LEVEL B ANALYSIS
GENERAL INFORMATION
Facility Name:
NPDES No.:
Type of Waste:
Facility Status:
Receiving Stream:
Stream Classification:
Subbasin:
County:
Regional Office:
Topo Quad:
FLOW INFORMATION
USGS #
Date of Flow Estimates:
Drainage Area (mi2):
b .(i
111. g,
Summer 7Q10 (cfs):
0 ,10
...)g. 6,
Winter 7Q10 (cfs):
0 , 1 67
qi . s
Average Flow (cfs):
D. l'S
iS3
30Q2 (cfs):
IWC at Point of Discharge (%):
Cummulative IWC (%):
: 'N.QAPAT:0:406.4:ARV"':.,:44::....0K4NOSINEMgr".24XSINtaintalit:..Agnaggli0
MODEL INPUT INFORMATION .2.1q1 5g e _t-R
LENGTH OF REACH (miles)
0.35
I- 0
INCREMENTAL LENGTH (miles)
0. 05
Oi l
0.06
WASTE CHARACTERISTICS
FLOW (MGD)
0.0075
CBOD (mg/1)
31,
NBOD (mg/1)
D.O. (mg/1)
5. 0
RUNOFF CHARACTERISTICS
7Q10 (cfs/mi2)
0, / LI
6, 1-
O. /
QA (cfs/rni2)
pL/L/
0 i 73
0 .73
CBOD (mg/1)
€2 . co
...2. DO
, 0 b
NBOD (mg/1)
/ . oo
1.00
1.00
D.O. (mg/1)
Die---ra Lk*
ple:koux if
0 I cPa L4
TRIBUTARY CHARACTERISTICS
7Q10 (cfs)
0. (/
QA (cfs)
.2 • 1
CBOD (mg/1)
. 00
NBOD (mg/1)
.2
/. 00
D.O. (mg/1)
ote A. tt / 4
SLOPE (fpm)
6043
s
<3, /
3, i
1\16:rne of facility
0.5
_2.00
1, co
cic-fo.LA H.

Facility: Henry Fork
NPDES#: NC0040797
Recieving Stream: Henry Fork River
Hydrologic Area:
Drainage Area Low Flow Patial Record Station:
Qave Low Flow Patial Record Station:
s7010 Low Row Patial Record Station:
w7010 Low Flow Patial Record Station:
3002 Low Row Patial Record Station:
Drainage Area New Site:
MAR New Site:
Qave per Report Equation:
s7010 per Report Equation:
w7010 per Report Equation:
3002 per Report Equation:
Drainage Area Ratio:
(new DA / Da at gage ]
Weighted Ratio:
HMO
83.20 miles squared
99.84 cfs
22.00 cfs
32.00 cfs
102.00 miles squared
1.20 cfs/miles squared
122.40 cfs
19.91 cfs
29.40 cfs
42.11 cfs
1.23:1
Continue
0.92 : 1
Drainage Area New Site:
MAR New Site:
Weighted Oave per Report Equation:
Weighted s7010 per Report Equation:
Weighted w7Q10 per Report Equation:
Weighted 3002 per Report Equation:
102.00 miles squared
1.20 cfs/mIles squared
122.40 cfs
26.44 cfs
38A9 cfs

USGS weighted low flow estimate procedure
FacilityltIqEaf2rILI N P D ES # Et1.299.9D2 Streamitlepry Fk.
Region
DA_LFPR
s7Q1O_LFPR
DA_new
MAR
QA_eq
STEP 1
[ HA1 0
•11=1.1•1=1.1.0•M••M•••••••110111i
_ 83.2
22
2.2._
122.40
sq mile
cfs
sq mile
cfs/sq mile
cfs
calculate drainage area ratio
NOTE: procedure applies for regions HA3, HA5,
HA9, and HA10, else see flow SOP
RATIO = new drainage area
drainage area at gage
IF 0.25 < RATIO < 4, CONTINUE to STEP 2, ELSE too far from gage
OK, do STEP 2 now!
STEP 2 determine weight of gage (weight_LFPR)
A. RATIO < 1 B. RATIO > 1
weight ratio weight Mk
0 1 0 1
[ #VALUE! I see B I i 0.92 I 1.23
1 0.25 1 4
STEP 3
HA3
HA5
HA9
HA1 0
STEP 4
weight =
0.92
calculate 7010_EQ using regional equation
26.43
2.27
2.27
19.91
cfs
cfs
cfs
cfs
7Q1O_EQ =
calculate 7010 yield using weighted equation
I 19.91
7Q1 Oyield = [weight_LFPR 7Q1O_LFPR] + [weight_EQ * 701 0_EQ]
cfs
DA_LFPR DA_new
yield = 0.24
STEP 5 calculate s7Q10
7010 = 7Q10yield * DA_new
summer 7010 =
26.44
cfs
1.22596154j
41.111MOOMOOM••••••=0•1=••=011
0.01 = 0.26 cfs/sq mile

USGS weighted low flow estimate procedure
Facility11:129.ty..E2t
Region
DA_LFPR
w7010_LFPR
DA_new
MAR
QA_eq
STEP 1
I. HA10
•••••••••••M•21=•••••••••••.1114
83.2
32
102
1.2
122.40
NPDES # ENC0040797 I Stream Ilipary.fic..13.11
M•••••• M.1141•1••=.••=0.1M•
sq mile
cfs
sq mile
cfs/sq mile
cfs
calculate drainage area ratio
NOTE: procedure applies for regions HA3, HA5,
HA9, and HA10, else see flow SOP
RATIO = new drainage area
drainage area at gage
IF 0.25 < RATIO < 4, CONTINUE to STEP 2, ELSE too far from gage
OK, do STEP 2 now!
STEP 2 determine weight of gage (weight_LFPR)
A. RATIO < 1 B. RATIO > 1
weight 1.11.4 weight rag
o 1 o 1
1 #VALUE! 1 see B I I 0.92 i 1.23
1 0.25 1 4
STEP 3
HA3
HA5
HA9
HA10
STEP 4
weight =
0.92
calculate 7Q10_EQ using regional equation
50.68
10.43,
10.43
29.40
cfs
cfs
cfs
cfs
7010_E0 =
calculate 7010 yield using weighted equation
29.40
cfs/sq mile
7Q10yield = [weight_LFPR * 7010_LFPR1 + [weight_E0 * 7010_E01
DA_LFPR DA_new
yield = 0.36 0.02
STEP 5 calculate w7Q10
7010 = 7010yield * DA_new
winter 7010 = 38.49 cfs
0.38
1.2259q1§A
cfs/mile