NCG020749_Complete SPU File - Historical_20100610

kA
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor C•:rector
June 10, 2010
Tony Merritt
Tony Merritt's Gravel Pitt
3200 Damascus Church Rd.
Chapel Hill, NC 27516
Subject: General Permit No. NCG020000
Tony Merritt's Gravel Pitt
COC NCG020749
Orange County
Dear Mr. Merritt:
Dee Freeman
Secretary
In accordance with your application for a discharge permit received on June 5, 2009, we
are forwarding herewith the subject certificate of coverage to discharge under the subject state
NPL�ES general permit. This permit is issued pursuant to the requirements of North Carolina
Gp,ic-al Statute 143-215.1 and the Memorandum of Agreement between North Carolina and the
US Environmental Protection Agency dated October 15, 2007 (or as subsequently amended).
Please take notice that this certificate of coverage is not transferable except after notice to
the Division of Water Quality. The Division of Water Quality may require modification or
revocation and reissuance of the certificate of coverage.
This site discharges to a water supply receiving water, Morgan Creek 16-41-2-(1.5). The
Department of Environmental Health has requested an Operation and Maintenance Plan for this
site. In order to meet the intent of their request, please submit a narrative on your operation and
clean out schedule for your BMPs associated with dewatering. Please submit this for DWQ
approval no later than July 26, 2010.
_ Based on a site visit conducted April 27, 2010, there are currently outfalls:
d watering/stormwater basin #1 by the active sand/gravel mine pit and stormwater pond #2
!(;,sated on east side of the property by the unnamed tributary of Morgan Creek (University
Lake). The application shows two other stormwater water basins that will be constructed in the
a tivt i-nine. Please make sure all these outfalls are properly noted and monitored according to
the
Please note that mine dewatering wastewater includes wet pit overflows caused solely
by direct rainfall and groundwater seepage for this type of mining operation. Any discharge of
this water (and any stormwater commingled with it) is subject to the effluent limitations in this
permit.
Wetlands and Stormwater Branch 7�TOne t
1617 Mail Service Center, Raleigh, North Carolina 27699.1617 1'V Qrtl l Carolina
Phone:
on: 512 -8 N. Salisbury St. Raleigh, North Carolina r S604 � '/���
Phone: 919-r307.63001 FAX: [phone] Customer Service: 1-877-623-6748 dZ
Internet: www,ncwaterquality.org
An Equal Opportunity \ Affirmative Action Employer

Mr. Tony Merritt
Tony Merritt's Gravel Pitt—NCG020749
.Tune 10, 2010
This permit does not affect the legal requirements to obtain other permits which may be
required by the Division of Water Quality or permits required by the Division of Land
Resources, Coastal Area Management Act or any other federal or local governmental permit that
may be required.
If you have any questions concerning this permit, please contact Brian Lowther at
telephone number [phone].
Sincerely,
/'��
for Coleen H. Sullins
cc: Raleigh Regional Office
Central Files
Stormwater Permitting Unit Files

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
GENERAL PERMIT NO. NCG020000
CERTIFICATE OF COVERAGE No. NCG020749
STORMWATER AND MINE DEWATERING DISCHARGES
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended,
Tony Merritt
is hereby authorized to discharge stormwater and mine dewatering wastewater from a facility
located at
Tony Merritt's Gravel Pitt
3200 Damascus Church Rd
Chapel Hill, NC
Orange County
�o receiving waters designated as an unnamed tributary to Morgan Creek, a class WS-11, HQW,
NSW, CA water in the Cape Fear River Basin, in accordance with the effluent limitations,
monitoring requirements, and other conditions set forth in Parts 1, II, III, IV, V, and VI of General
Permit No. NCG020000 as attached.
This certificate of coverage shall become effective June 10, 2010.
This Certificate of Coverage shall remain in effect for the duration of the General Permit.
Signed this day June 10, 2010.
�n
for Coleen H. Sullins, Director
Division of Water Quality
By the Authority of the Environmental Management Commission

LOCATION MAP:
V,CG020749
Map Scala 1:20,000
Tony Merritt
Tony Mlerritt's Gravel Pit
Latitude: 35052' 52" N
Longitude: 790 5' 12,2" W
County:Crange
Receiving Stream: UT b Nbrgan Creek (Lhiversity Lake)
Stream Class: WS-II, HQW, NSW, CA
Sub -basin: 03-06-06 (Cape Fear River Basin)
Facility Location

NCDENR
North Carolina Department of Environment and Natural Resources
Beverly Eaves Perdue
Governor
Mr. Tony Merritt
Tony Merritt's Gravel Pitt
3200 Damascus Church Road
Chapel Hill, NC 27516
Dear Mr. Merritt:
Division of Water Quality
Coleen H. Sullins
Director
June 19, 2009
Subject: General Permit No. NCG020000
Tony Merritt's Gravel Pitt, NCG 020749
Orange County
Dee Freeman
Secretary
The Division of Water Quality's Stormwater Permitting Unit received a National Pollutant Discharge
Elimination System (NPDES) permit application for Tony Merritt's Gravel Pitt on June 05, 2009. The
application indicated the mine has a mining permit from the Division of Land Resources (DLR). However,
the mining permit expired on June 10, 2008. Please be aware that the issuance of an NPDES permit is
contingent upon the renewal of an associated mining permit from DLR. Our office will process your
stormwater permit application once a DLR mining permit has been renewed for your project.
Please also be aware that if your project is located near wetlands, your NPDES permit will require
dewatering operations without wetland impacts. The specific requirements for mine dewatering at facilities
near wetlands can be found in the text of the general NPDES mining permit number NCG 020000 available
on our website, http://h2o.enr.state.nc.us/su/Fonns_Documents.htm. See Section C, Part 1 of the permit on
the page labeled, "Part III Page 5 of 9". An approved Operation and Monitoring Plan is required for
NPDES-permitted mining facilities. Discharging mine dewatering wastewater without Plan approval will be
subject to enforcement action. A Plan for your facility must be submitted to the Washington Regional Office
within 60 days of your receipt of an NPDES permit. We encourage you to contact Autumn Hoban at the
Raleigh Regional Office at [phone] to address any wetland concerns for your facility in order to .
ensure a successful NPDES application review.
If you have any questions concerning the NPDES permit approval process, please contact me at telephone
number [phone].
cc: Raleigh Regional Office, Autumn Hoban
Central Files
Stormwater Permitting Unit Files
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone] Customer Service: 1-877-623-6748
Internet: www.ncwaterquality.org
An Equal Opportunity 1 Affirmative Action Employer
Sincerely,
Brian Lowther
Environmental Engineer
One
NortbCar01_ina

Jennifer,
I completed a site visit yesterday at Tony Merritt Mine and have attached photos. I will send the
photos in separate e-mails, I have no way to shrink the size of the files on my computer ;-( .
The intermittent stream that runs by the mine had very clear water running through it
yesterday. It rained hard in the area while I was there and no Sw ponds on the site were
discharging.
The pictures are labeled to give you a visual of the set-up I observed.
There are two clear outfalls. Outfall001 is the one labeled "Rock Outlet Discharge Location" on
the site map. The photo labeled SWPondbyOutfall001 is the one labeled "1.95 acre lake" on the
site map. The water in this SWPond/Lake (as you can see catches sediment/
erosion product from the mine wall and contains it?). The water is extremely colored and turbid.
I would recommend that the SWpond/lake capacity be evaluated to determine it's current
operating status. No flow was observed at the rock dam overflow yesterday, but when there is
overflow the water is likely to exceed turbidity and possibly TSS. The rock dam does help, but its
was hard for me to determine with no flow what the discharge quality would be once the water
filtered through the rock dam into the stream.
Outfa11002 discharge is through SWPond by Outfa11002 and through a rock dam (show in photo)
and then sheet flows across a wooded Bred dow(( Lo Lhe creek. The SWpond/sediment basin is
where the site dewaters to. The basin is overgrown with vegetation, trees, and its
design/holding capacity is also questionable? No discharge was overflowing yesterday and the
basin is somewhat dry right now. The owner indicated the drought had dried up the basin and
he was not having to de -water during drought conditions. With rain we are seeing now, the
conditions of the SW pond/sediment basins will be more crucial.
The mine photos show various ponds within the mine itself, which store a lot of the water in the
mine, as opposed to discharging it.
I am sending the photos, since you may see additional comments or requests to be addressed
associated with the issuance of this permit.
Samples were taken by the site and results are to be forwarded by their engineer, Mr. Schilling.
Water quality of the stream with regards to TSS, color, turbidity was excellent the day of my un-
announced rainy day site visit.
Hope this helps and please contact me if I can be of further assitance.
Sincerely,
Autumn
rut,lrrin llc:l_:ar'�
E, vi r'omaef,Lail Spec-i alit L
i,ICDENR- Palcigli t:��_lion.al
Surface Water Protection
3800 F,arrett Drive
Raleigh Nr' ;7600,
Office (919) 7t41-4247
Fax [phone]'-)

A' Division of Water Quality / Surface Water Protection
rav
wrro���
NCDENRNational Pollutant Discharge Elimination System
Varna GAao D­ of
ENv,noHmr.4i AHD NRWiAI. RnioincF_S
NCG020000
NOTICE OF INTENT
FOR AGENCY USE ONLY
Date Received
Year
Month
Day
Certificate of Coverage
NCG02
Check #
IAmount
Permit Assigned to
National Pollutant Discharge Elimination System application for coverage under General Permit
NCG020000:
STORMWATER DISCHARGES associated with activities classified as:
SIC (Standard Industrial Classification) Code - 14XX Mineral Mining Industry (except as specified below)
The following activities are also included:
• Active or inactive mining operations (including borrow pits —except for NCDOT borrow pits) that discharge
stormwater contaminated with or that has come in contact with, any overburden, raw material, intermediate
products, finished products, byproducts or waste products located on the site of such operations;
• Stormwater from vehicle maintenance activities at mining operations;
• Overflow from facilities that recycle process wastewater; and/or
• Mine dewatering (wastewater)
The following activities are specifically excluded from coverage under this General Permit:
• Stormwater discharges associated with peat mining, coal mining, and metal mining;
• Stormwater discharges from mining operations which are intermixed on site with stormwater from asphalt
operations and/or concrete operations;
• Stormwater discharges associated with oil and gas extraction operations; and
• Stormwater discharges associated with tourist gem mines
• NCDOT borrow pits are covered under NCS000150
The following discharges are covered by NPDES general permit NCG520000 instead of NCG020000:
• Point source discharges of stormwater and wastewater from in -stream sand mining operations (i.e., sand
dredging or dipping operations)
For new mining sites that require an authorization to construct (ATC) wastewater treatment facilities: This
NOI is also an APPLICATION FOR an ATC for new wastewater treatment facilities. ATC requests must be
submitted at least 90 days prior to construction'.
For existing mining sites that require an Authorization to Operate (ATO) wastewater treatment facilities:
This NOI is also an APPLICATION FOR an ATO for wastewater treatment facilities in place.
Construction, modification, or installation of any new treatment components at an existing site requires
an ATC. (If the site is already covered by NCG020000, the ATC request may be submitted without an NOI).
Some wastewater treatment facilities used to treat or recycle process wastewater (even if commingled
with stormwater) at mining sites will require an ATC prior to construction per 15A NCAC 2H .0138.
Please see the NCG020000 General Permit for details about which treatment facilities require an
ATC (summarized in Table 1 at the end of this form). For example, an ATC is required for treatment
of mine dewatering discharge from clay pits and non -closed -loop wastewater recycle systems. The
authorization to construct or continue to operate will be issued at the same time as the Certificate of
Coverage (COC) for the NCG02 permit. Design of treatment facilities must comply with requirements
of 15A NCAC 2H .0138 & .0139.
Page 1 of 7
'As per 15A NCAC 2H .0106
2Unless treatment facilities are designed, constructed, and put into operation by employees internal to the company who are qualified to
perform such work for their respective companies in accordance with General Statutes, 89C-25 (7), plans and specifications must be signed
and sealed by a P.E.
SWU-217-071408 Last revised 7/14/08

ALTT4
NC®ENR
UarrN Gu.ouw C?er,�m+evr oa
l•-N�^RONk E�!T aNn NPTVI'.:V.. RP-'.(]Ji:FS
NOTICE OF INTENT
Division of Water Quality / Surface Water Protection
National Pollutant Discharge Elimination System
NCG020000
FOR AGENCY USE ONLY
Date Received
Year
Vlonth
Dav
Certificate of Covera_ec
N C I G 1012
Check n Amount
Permit .Assiencd to
National Pollutant Discharge Elimination System application for coverage under General Permit
NCG020000:
STORMWATER DISCHARGES associated with activities classified as:
SIC (Standard Industrial Classification) Code - 14XX Mineral Mining Industry (except as specified below)
The following activities are also included:
• Active or inactive mining operations (including borrow pits —except for NCDOT borrow pits) that discharge
stormwater contaminated with or that has come in contact with, any overburden, raw material, intermediate
products, finished products, byproducts or waste products located on the site of such operations;
• Stormwater from vehicle maintenance activities at mining operations;
• Overflow from facilities that recycle process wastewater; and/or
• Mine dewatering (wastewater)
The following activities are specifically excluded from coverage under this General Permit:
• Stormwater discharges associated with peat mining, coal mining, and metal mining;
• Stormwater discharges from mining operations which are intermixed on site with stormwater from asphalt
operations and/or concrete operations;
• Stormwater discharges associated with oil and gas extraction operations; and
• Stormwater discharges associated with tourist gem mines
• NCDOT borrow pits are covered under NCS000150
The following discharges are covered by NPDES general permit NCG520000 instead of NCG020000:
• Point source discharges of stormwater and wastewater from in -stream sand mining operations (i.e., sand.
dredging or dipping operations)
For new mining sites that require an authorization to construct (ATC) wastewater treatment facilities: This
NOI is also an APPLICATION FOR an ATC for new wastewater treatment facilities. ATC requests must be
submitted at least 90 days prior to construction'.
For existing mining sites that require an Authorization to Operate (A TO) wastewater treatment facilities:
This NOI is also an APPLICATION FOR an ATO for wastewater treatment facilities in place.
Construction, modification. or installation of any new treatment components at an existing site requires
an ATC. (if the site is already covered by NCG020000, the ATC request may be submitted without an NOI).
Some wastewater treatment facilities used to treat or recycle process wastewater (even if commingled
with stormwater) at mining sites will require an ATC prior to construction per 15A NCAC 2H .0138.
Please see the NCG020000 General Permit for details about which treatment facilities require an
ATC (summarized in Table 1 at the end.of this form). For example, an ATC is required for treatment
of mine dewatering discharge from clay pits and non -closed -loop wastewater recycle systems. The
authorization to construct or continue to operate will be issued at the same time as the Certificate of
Coverage (COC) for the NCG02 permit. Design of treatment facilities must comply with requirements
of 15A NCAC 2H .0138 & .0139.
'As per 15A NCAC 2H .0106 Page 1 of 7
2Unless treatment facilities are designed, constructed, and put into operation by employees internal to the company who are qualified to
perform such work for their respective companies in accordance with General Statutes, 89C-25 (7), plans and specifications must be signed
and sealed, by a P.E.
SWU-217-012108 Last revised 1/21/08

NCG020000 N.O.I.
Construction of wastewater treatment facilities subject to the ATC/ATO requirements in the NCG02 permit
at new or existing mining sites requires submission of three (3) sets of plans and specifications signed
and sealed by a Professional Engineer (P.E.) or qualified staff2 along with this application. A copy of the
design calculations should be included. Please see questions 18 & 19.
Table 1: Wastewater Permit ATC/ATO Requirements
Mine Dewatering
Yes
No
Quarries
—
0
Sand Pits
—
4
Clay Pits
4
—
Any Dewatering with Chemical Treatment
♦
—
Process Wastewater
Sand/Gravel
—
46
Closed -Loop Recycle
—
4
Other Recycle
+
—
1 I For questions, please contact the DWQ Regional Office for your area. (See page 7)
(Please print or type)
1) Mailing address of owner/operator (address to which all permit correspondence will be mailed):
Name
Street Address
City
Telephone No.
E-mail Address
cc,tp
G Guy/-?t State _/c-� ZIP Code 2 7 z/((
c G y32- 5�: �J Fax: c >
-- —� C! C 13.Z--7.3/�f
2) Location of facility producing discharge:
r'
Facility Name 14,tv�-
Facility Contact J a "r/ Nrvnt'f"
Street Address 3 ��' i�ara6c.�5 G�Hch Rd,
City Cti;,�rt 6�,1/ State ZIP Code
County Gar �K 5
Telephone No. �K C/ 51 5'�Z- Fax:
Contact E-mail
3) Physical Location Information:
Please provide a narrative description of how to get to the facility (use street names, state road numbers, and
distance and direction from a roadway intersection). lY°"^ J kr 1'i -5�r' h'�n�9S T�K� G ^ems'-5h�vaSr,
4) Latitude Longitude 7- /%rirLluyc'/sl Ll+'f�,
g' S ' (degrees, minutes, seconds)
�2�1TL7 %G`OL`�
5) This NPDES Permit NOi Application applies to which of the following: r
❑ New or Proposed Facility
Date operation is to begin
Existing
❑ New Permit not applicable - ATC request only. NPDES Permit Number _
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SWU-217-012108 Last revised 1/21/08

NCG020000 N.O.I.
6) Standard Industrial Classification:.
Provide the 4 digit Standard Industrial Classification Code (SIC Code) that describes the primary industrial
activity at this facility
SIC Code: / 4 kf �-
7) Provide a narrative description of the types of minerals mined at this facility: u act a uc�c u�'r
tv
8) Discharge Points:
Number of discharge points (ditches; pipes, channels, etc, that convey discharges from the property):
Stormwater:_a Mine dewatering: _I Process Wastewater Overflow:
Discharge points should be clearly marked on the submitted site plan.
Please provide short narrative description of discharges: A",Fjap 1Y,f- zc au'c,w �
�'�� f�-✓'fll'i 7C� u Jr�l�l;d[sN �" �:1y:+7�j � lZ�� /%/�i%G: j 11% L'I i�C' /jt rl? � 1%Yt'�,l C',�lrCf3 Y't(�19 Lfic� /YfL
i ✓1 .f�� t lYl: y? r ; v�ti'G 1-- r5 i% iri'7,t%!'tp Y`'a �! S'{'cl�, ixc•ty= ,�:•r���9 ,
9) Receiving waters:
What is the name of the body or bodies of water (creek, stream, river, lake: etc.) that the facility stormwater
di id/ui wastewater discharges end up in'? 4y1 * u ,; i✓�-s; �y G�ic�
If the site stormwater discharges to a separate storm sewer system, n4me the operator of ;he separate storm
sewer system (e.g. City of Raleigh municipal storm sewer).
Receiving water classification (if known):�t;' �
I/ i �
Note: Discharge of process wastewater to receiving waters classified as WS-I1 to WS-V or SA must
be approved by the N.C. Dept. of Environmental Health. If DEH does not approve, coverage
under NCG020000 cannot be granted. No new discharges of process wastewater are
permitted in receiving waters classified as WS-1 or freshwater ORW.
10) Will mining operations require dewatering near wetlands or impact any stream, groundwater, or wetlands?
V No
❑ Yes If yes, please provide information about any 404/401 Certification permits.
Note: Wetlands must be CLEARLY DELINEATED on the site plan. Mine dewatering activities that have
the potential to drain wetlands or otherwise impact surface water or groundwater MUST develop and
implement an Operation and Monitoring (O&M) Plan that has been approved by the Division.
The O&M Plan should be submitted to the Regional Office and must be approved prior to operation.
The plan shall include, but is not limited to: (1) Groundwater monitoring strategies to demonstrate the
effect of pumping and to establish any pumping regime necessary to reduce impacts, and (2) Detailed
plans to maintain surrounding hydrology and respective -monitoring to demonstrate compliance.
11) Does this facility already have a valid Mining Permit from the Division of Land Resources (DLR)?
❑ No (If not, please indicate the status of the Mining Permit application:
® Yes
If yes, please provide the Mining Permit number and include a copy with your application: 5' o �'
Note: DWQ cannot issue a COC for the NCG020000 General Permit until a Mining Permit is issued or
renewed by the Division of Land Resources (DLR).
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NCG020000 N.O.I.
12) Will this mining operation precede development activities at this site?
No
❑ Yes
13) Does this facility have any other NPDES permits?
No
❑ Yes
If yes, list the permit numbers for all current NPDES permits for this facility:
14) Does this facility have any Non -Discharge permits (ex: recycle permits)?
i (No
❑ Yes
If yes, list the permit numbers for all current Non -Discharge permits for this facility:
15) Does this facility employ any best management practices for stormwater control?
❑ No
Yes
If yes, please briefly describe:
16) Does this facility have a Stormwater Pollution Prevention Plan?
No
❑ Yes
If yes, when was it implemented?
17) Will vehicle maintenance activities occur at this facility?
No ❑ Yes
Wastewater Treatment Facilities:
18) Will mine dewatering discharges occur? (AMATO required for clay pits or dewatering with chem. treatment)
❑ No X Yes
19) Will discharges of overflows from process wastewater treatment systems occur? (ATC or ATO required,
unless sand/gravel mining or closed -loop recycle system)
No ❑ Yes
If yes, answer the following questions on the wastewater treatment system:
a. Please describe the type of process used to treat and/or recycle the process wastewater. Give:
design specifics (i.e. design volume, retention time, surface area, etc.). Existing treatment
facilities should be described in detail, and design criteria or operational data should be provided
(including calculations) to ensure that the facility can comply with requirements of the General
Permit. [Use separate sheet(s)]
b. Does this facility employ chemical additives to flocculate suspended solids? ❑ No ❑ Yes
If yes, please state the name, manufacturer and the quantity of average daily usage of the
chemical additive
Vote: Please see httQ://h2o.enr.state.nc.us/ws/PAMS list.htm for a list of approved polyacrylamide (PAMS)
products for use in North Carolina.
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NCG020000 N.O.I.
C. Does this facility overflow only during rainfall events exceeding the 10-yr, 24-hr rainfall event?
❑ No ❑ Yes
20) Are wastewater treatment facilities (including recycle systems) planned in the 100-year flood plain?
FY No ❑ Yes If so, include information to demonstrate protection from flooding. (Minimum design
requirements for treatment works include protection from the 100-year flood, per 15A NCAC 2H .0219.)
21) Hazardous Waste:
a) Is this facility a Hazardous Waste Treatment, Storage, or Disposal Facility?
iX No ❑ Yes
b) Is this facility a Small Quantity Generator (less than 1000 kg. of hazardous waste generated per month) of
hazardous waste?
[P( No ❑ Yes
c) Is this facility a Large Quantity Generator (1000 kg. or more of hazardous waste generated per month) of
hazardous waste?
fX No ❑ Yes
d) If you answered yes to questions b. or c., please provide the following information:
Type(s) of waste:
How is material stored:
Where is material stored:
How many disposal shipments per year:
Name of transport / disposal vendor: _
Vendor address:
22) Certification: North Carolina General Statute 143-215.6 b (i) provides that:
Any person who knowingly makes any false statement, representation, or certification in any application, record, report, plan, or other
document filed or required to be maintained under this Article or a rule implementing this Article; or who knowingly makes a false
statement of a material fact in a rulemaking proceeding or contested case under this Article; or who falsifies, tampers with, or knowingly
renders inaccurate any recording or monitoring device or method required to be operated or maintained under this Article or rules of the.
[Environmental Management] Commission implementing this Article shall be guilty of a Class 2 misdemeanor which may include a fine not to
exceed ten thousand dollars ($10,000).
I hereby request coverage under the referenced General Permit. I understand that coverage under this permit
will constitute the permit requirements for the discharge(s) and is enforceable in the same manner as an
individual permit.
I agree to abide by the following as a part of coverage under this General Permit:
1. I agree to abide by the approved Mining Permit for this mining activity. (A copy of the valid
mining permit must be attached to this request.
2. 1 agree to not discharge any sanitary wastewater from this mining activity except under the
provisions of another NPDES permit specifically issued therefore.
3. 1 agree that bulk storage of petroleum products and other chemicals shall have adequate
protection so as to contain all spills on the site.
4. 1 agree that solid wastes will be disposed of in accordance with N.C. statutes and rules
governing solid waste disposal.
5. 1 agree that maintenance activities for vehicles and heavy equipment will be performed so as to
not result in contamination of the surface or ground waters.
Page 5of7
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NCG020000 N.O.I.
I agree to abide by the provisions as listed above and recognize that the provisions are to be considered as
enforceable requirements of the General Permit.
I certify that I am familiar with the information contained in this application and that to the best of my
knowledge and belief such information is true, complete, and accurate.
Printed Name of Person Signing: /(i�J! /�,i�-1 , yl /I/' /2�c f -
Title:
r54nature of Applicant) ( ate Signe
Notice of Intent must be accompanied by a check or money order for $100.00 made payable to NCDENR.
Final Checklist
This application will be returned as incomplete unless all of the following items have been included:
Check for $100 made payable to NCDENR
This completed application and all supporting documents
Copy of the valid approved mining permit (MP) for the facility or indication of MP application status
Copy of a county map or other general location map that shows the mining site and nearest major roads
Copy of USGS topographic map showing the mining site and surrounding areas, or other map that clearly
shows site location in relation to nearby streams, wetlands, and other waters, etc.
Copy of mining site plan with all wetlands clearly delineated
❑ If the mine is near wetlands, or may otherwise impact surface water or groundwater, contact the regional
office about an O&M Plan (contact information on the next page). Please refer to this O&M Plan checklist:
✓ Site map with wetlands, ditches, well -placements, borrow areas, overburden storage, stormwater
controls/BMPs, vehicle maintenance areas, settling basins, product process areas, and access roads.
✓ Well information (design, depths, maintenance)
✓ Physical monitoring for the wetlands areas
✓ Settling pond sizing information, if applicable
✓ Level spreader design, if applicable
✓ Details about dewatering method
✓ Description of measures to prevent erosion and flooding
❑ If an ATC or ATO is required, three (3) sets of plans, specifications, and design calculations, signed,.
sealed, and dated by a P.E. ATC and ATO requirements in NCG02000 are summarized in Table 1 on
Page 2 of this NCI (see the permit text for more details). Plans shall show all pertinent design features,
including the location of the outfall(s). If stormwater is flowing off -site, the plan must show that stormwater
will not be mixed with wastewater.
Mail the entire package to:
Stormwater and General Permits Unit
Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Note
The submission of this document does not guarantee the issuance of an NPDES permit.
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S W U-217-012108 Last revised 1 /21 /08

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Georgoulias, Bethany
From: Robin Maycock <[e-mail]>
Sent: Tuesday, March 08, 2016 6:33 PM
To: Georgoulias, Bethany
Cc: Pickle, Ken; Alexander, Laura
Subject: Re: Merritt Gravel Pit NCG 020749
Bethany:
Thank you - I have scanned and emailed the signed forms to Laura and will mail two copies to DWQ Central
Files with an explanatory cover letter tomorrow. Now that I have the Merritt's all caught up, I would like to
explain. The Merritt's are literally a small "Mom and Pop" quarry and they hired me to handle their stormwater
monitoring and reporting. I did not realize that reporting was required if there were no discharges, so the
mistake was entirely my fault. The cost of renting a pump and pumping from the mining area to the outfall is
very expensive, so they decided to move the mining operation up the slope in order to not have to
discharge. They are also using the water for dust control on their access road, which also saves them money. I
hope that if you have any questions you will contact me. Thanks again. Robin Maycock
On Tue, Mar 8, 2016 at 12:32 PM, Georgoulias, Bethany <bethany.geor ouliasgncdenr.gov> wrote:
Those copies signed by Mr. Merritt do need to be submitted to the address for Central Files, DWR (even though we are
in DEMLR). It would be helpful to include a letter explaining they are a resubmittal with correct signature. You are
welcome to send Laura Alexander (copied) a scanned copy via email, but the permit requires a signed paper copy be
submitted to fulfill reporting requirements. The scanned copy will assist us in updating our electronic repository that
will be accessible by Regional Staff, so it would be great if you could send us those, too.
Thanks,
Bethany
Bethany Georgoulias
Environmental Engineer
Stormwater Pennitting Program, Division of Energy, Mineral, and Land Resources
N.C. Department of Environmental Quality
919 807 6372 office

bethany.geor oug_ [e-mail]
1612 Mail Service Center, Raleigh, NC 27699-1612 (mailing)
512 N. Salisbury Street, Raleigh, NC 27604 (location)
Website: http://portal.ncdenr.org/web/lr/stormwater
thlg Comp
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Robin Maycock[mailto:[e-mail]]
Sent: Tuesday, March 08, 2016 7:36 AM
To: Pickle, Ken <[e-mail]>
Cc: Georgoulias, Bethany<[e-mail]>
Subject: Merritt Gravel Pit NCG 020749
Ken/Bethany: I am emailing you as Tony Merritt's consultant. I work full time for NCDOT, and we have
spoken before. I work as a consultant part-time and am responsible for the storm water permit for Merritt's
Gravel Pit. I recently submitted the annual summary DMRs for 2013, 2014 and 2015: As there were no
now have them signed by him and I can send those copies to you. Shall I scan and email or mail them to you? If
you have any concerns or questions, please email me at this address or call me at 919 418-
7645. Thanks! Robin

els
ENGINEERING & ENVIRONMENTAL SCIENCE COMPANY
3008 ANDERSON DRIVE, SUITE 102
RALEIGH, NC 27609
March 19, 2009 [phone]
Mr. Tony Merritt
Tony Merritt's Gravel Pit
3200 Damascus Church Road
Chapel Hill, NC 27516
Re: Tony Merritt's Gravel Pit
Orange County
Cape Fear River Basin
Dear Mr. Merritt:
The following discusses the existing above referenced mine and the stormwater
evaluation.
GENERAL PROJECT DISCUSION
Tony Merritt's Gravel Pit (Permit No. 68-04) is located 1/4 mile west of the intersection
of Smith Level Rd and Damascus Church Rd. (See Figure 1 Attachment A.) The subject
mine is composed of three (3) tracts of land totaling 26 acres. Ms. Lela Lou Merritt owns
two (2) of the tracts (25.51 acres) and the third tract (0.49acres) is owned by Tony
Merritt.
Up to 17.79 acres is pmp-osed for disturbance in the next 10-years. Land disturbance will
include the placement of beneficiaTfih after each area of the mine is depleted.
At the present time, no outlet for gravity flow is provided for the stormwater at the mine
area. Stormwater accumulates in the excavation and the water level generally reflects the
groundwater table. During heavy rains and during the late fall to early spring months,
pumping is required. Pumping is normally conducted on average 48 hours per month at a
maximum rate of 1000gpm. The primary spillway (Basin No. 1) has a horizontal and
vertical corrugate metal pipe that can pass the 25-year rain event.
As mining progresses to the south, the beneficial fill will be placed along the northern
portion of the mine. The existing Basin No. 1 will need to be enlarged to accommodate
runoff from the beneficial fill embankment slope. The basin at this time will have a
targeted partial collection size of 19 micron.
To aid in sediment removal a Faircloth Skimmer is to be installed to drain the basin. The
2 inch sized skimmer can drain the basin within 1.1 days for the initial basin size and 3.3
days when the basin is enlarged.

Near the end of the mine activity, a new basin (Basin No.2) will need to be added, as
water will no longer be accumulating in the mine. This basin will also have a horizontal
and vertical pipe as the primary spillway and can pass at least the 2-year rain event. A
grass lined earth spillway will be provided for the secondary spillway: The primary and
secondary spillway can pass the 25-year rain event.
For stability of the beneficial fill placement perimeter ditches (Ditch No.1 and No.2) will
be provided around the perimeter of the beneficial fill. Silt fence as needed will be
installed at the toe of the beneficial fill embankment where runoff is not collected by the
basins.
EROSION CONTROL AND PUMP DICHARGE
Attachment B contains the erosion control calculations and the targeted particle size
collection during pumping. Basin No. 1 can trap the 30 micron particle initially. Once
the basin size is increased the 19 micron particle size is targeted.
DEWATERING OPERATION AND MANAGEMENT PLAN
The accompanying mine maps provide the safeguards to insure that the dewatering of the
mine does not impact the adjacent unnamed stream. One (1) monitoring well will be
installed between the mine and the stream. Monitoring the water level estimated inside
the mine and at the monitoring well will be conducted to evaluate the drawdown curve of
the water table. Adjustments of the mine dewatering activity will be made depending on
the information collected and further analyses needed.
CLOSURE
We appreciate serving Merritt's Gravel Pit on this project. Please contact us if you have
any further questions.
Sincerely
T. Patrick Shil gton, P. .
President
Attachment A: Figure 1
Attachment B: Calculations
CC: Jennifer Jones-3 copies
Autumn Hoban-2 copies
6's

els

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Appendices
Raleiclh,
North Carolina
35.8706N..78.7864W
ARI*
5 min.
10 min.
15 min.
30 min.
60 min.
120 min.
3 hr.
6 hr.
12 hr.
24 hr.
(years)
2
5.58
4.46
3.74
2.58
1.62
0.94
0.66
0.40
0.24
0.14
10
7.08
5.66
4.78
3.46
2.25
1.33
0.95
0.58
0.34
0.021
25
7.78
6.19
5.24
3.88
2.58
1.54
1.11
0.68
0.41
0.24
100
8.64
6.86
5.78
4.43
3.05
1.85
1.36
0.84
0.51
0.30
Fayetteville,
orth Caro ina 35.0583N. 78.8583W
ARI*
.; 5 min.
10 min.
15 min.
30 min.
60 min.
120 min.
3 hr.
6 hr.
12 hr.
24 hr.
(years)
2
6.11
4.88
4.09
2.83
1.77
1.04
0.74
0.44
0.26
0.15
10
7.96
6.36
5.36
3.88
2.53
1.54
1.10
0.66
0.39
0.23
25
8.94
7.13
6.02
4.46
2.97
1.83
1.32
0.80
0.47
0.28
100
10.44
8.29
6.99
5.35
3.69
2.29
1.69
1.03
0.62
0.36
Wilmington,
North Carolina 34.2683N,
77.9061W
ARI*
5 min.
10 min.
15 min.
30 min.
60 min.
120 min.
3 hr.
6 hr.
12 hr.
24 hr.
(years) .
2
7.39
5.92
4.96
3.42
2.15
1.28
0.91
0.56
0.33
0.19
10
9.70
7.75
6.54
4.74
3.08
1.94
1.39
0.87
0.51
0.30
25
10.98
8.75
7.40
5.48
3.65
2.38
1.73
1.08
0.64
0.38
100
12.92
10.27
8.65
6.63
4.56
3.18
2.37
1.49
0.89
0.53
ARI* ,
' 5 min.
10 min.
15 min.
30 min.
60 min.
120 min.
3 hr.
6 hr.
12 hr.
24 hr.
(years)
2
6.41
5.12
4.29
2.96
1.86
1.10
0.78
0.47
0.27
0.16
10
8.38
6.70
5.65
4.09
2.66
1.64
1.19
0.72
0.42
0.25
25
9.48
7.55
- 6.38
4.73
3.15
1.99
1.46
0.88
0.52
0.31
100
11.16
8.87
7.47
5.72
3.94
2.58
1.93
1.18
0.70
0.42
ARI*
5 min.
10 min.
15 min.
30 min.
60 min.
120 min.
3 hr.
6 hr.
12 hr.
24 hr.
(years)
2
6.46
5.16
4.32
2.99
1.87
1.08
0.79
0.48
0.29
0.17
10
8.47
6.77
5.71
4.14
2.69
1.62
1.20
0.74
0.44
0.27
25
9.56
7.62
6.44
4.77
3.17
1.96
1.47
0.91
0.54
0.33
100
11.26
8.95
7.54
5.77
3.98
2.54
1.95
1.21
0.73
0.44
ARI*
5 min.
10 min.
15 min.
30 min.
60 min.
120 min.
3 hr.
6 hr.
12 hr.
24 hr.
(years)
2
7.20
5.75
4.82
3.33
2.09
1.29
0.94
0.58
0.34
0.20
10
9.41
7.52
6.35
4.60
2.99
1.93
1.43
0.89
0.53
0.31
25
10.66
8.49
7.18
5.31
3.54
2.33
1.75
1.09
0.65
0.38
100
12.53
9.95
8.39
6.42
4.42
3.03
2.32
1.45
0.88
0.51
Rev. 0/06 8.03.9

0
Table 8.031:
Value of Runoff Coefficieni
(C) for Rational Formula
Land Use
C Land Use
C
Business:
Lawns:
Downtown areas
0.70-0.95 Sandy soil, flat, 2%-
0.05-0.10
Neighborhood areas
0.50-0.70 Sandy soil, ave., ._- _
0.10-0.15
Residential:
2-7%
0.15-0.20
Single-family areas
Sandy soil, steep,
0.30-0.50
0.13-0.17
Multi units, detached
7%
0.40-0.60 Heavy soil, flat, 2%
0.18-0.22
0.25-0.35
Multi units, Attached
0..60-0.75 Heavy soil, ave.,
Suburban
0.25-0.40 2-7%
Industrial:
Heavy soil, steep,
Light areas
0.50-0.80 7%
0.30-0.600.20-0.50
Heavy areas
0.60-0.90 Agricultural land:
Parks, cemeteries
0.10-0.25 Bare packed soil
0.30-0.60
Smooth
0. -
Playgrounds
0.20-0.35
-
a e rows
- .25
Railroad yard areas
0.20-0.40 Heavy soil no crop
Unimproved areas
Heavy soil with
0.10-0.30
0.15-0.45
crop
0.05-0.25
Streets:
Sandy soil no crop
0.05-0.25
Asphalt
0.70-0.95 Sandy soil with
Concrete
0.80-0.95 crop
0.10-0.25
Brick
0.70-0.85 Pasture
avy soil
0.15-0-.
Drives and walks
0.75-0.85 dy soil
0.05-0.2
o ands
.05-0.25
Roofs
0.75-0.85
NOTE: The designer must
use judgement to select the appropriate C
value within the range for the appropriate land use. Generally, larger
areas with permeable soils,
flat slopes, and dense vegetation should
have lowest C values. Smaller
areas with slowly permeable soils, steep
slopes, and sparse vegetation should be assigned highest C
values.
Source: American Society of Civil Engineers
8.03.E Rev. 6/06

Appendices
Table 8.03h Roughness
coefficients (Manning's n)
for sheet flow
Equation 8.03g
Surface description n'
Smooth surface (concrete, asphalt, gravel, or bare 0 01
soil)
Fallow (no residue) ................................................ 0.05
Cultivated soils:
Residue cover < 20%.......................................... 0.06
Residue cover > 20%........................................... 0.17
G
rass.
Short grass prairies ............................................. 15
Dense grasses2.................................................... 0.
Bermudagrass...................................................... 0.41
Range (nutral)......................................................... 0.13
Woods: 3
Light underbrush ................................................. 0.40
Dense underbrush ............................................... 0.80
1 The n values are a composite of information compiled by Engman (1986).
2 Includes species such as weeping lovegrass, bluegrass, buffalo grass, blue grama
grass, and native grass mixtures.
3 When selecting n , consider cover to a height of about 0.1 ft. This is the only part of
the plant cover that will obstruct sheet flow.
For sheet flow of less than 300 feet, use Manning's kinematic solution
(Overtop and Meadows 1976) to compute Tt:
0.007(nQ1.1
Tt — (P 2) 0.5sO.4
where:
Tt = Travel time (hr)
n = Manning's roughness coefficient (Table 8.03h)
L = flow length (ft)
P2 = 2-year, 24-hour rainfall (in)
s = slope of hydraulic grade line (land slope, ft/ft)
This simplified Form of the Manning's kinematic solution is based on the
following: (1) shallow steady uniform flow, (2) constant intensity of rainfall
excess (that part of a rain available for runoff), (3) rainfall duration of 24
hours, and (4) minor effect of infiltration on travel time.
Rev. 6/06 8.03.27

7�e
zloll...
(s, o
-------- ---

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;1
3
t-- T 0
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i
!
— I iA
a a •�
s
fl 2� 01UV'it,L
i
I
-- — ..— — -- — — -- -- -- — ---- --- ..----..._..------- ---
—
----------- -- ----- ------ — --- —

i
I
i
Fall velocity, m/sec
4
6 810' 2. 3 4 6 810-2
Fall
velocity, ft/sec
See inset
10—'
2 3 4 6 100
100
10`
32°F (0°C)
r,
41°F (5°C)
-----
10'
50°F (10°C)
10—'
59°F (15°C)
--
68°F (20°C)
77°F (25°C)0.02
01 p
`m
a
10-5
10-4 j 10-3
I v 11�
10-2 t
10—'
100
00096 lr i t
Fall velocity, ft/sec
3 4
6 8 10-5 2 3 4 6 8 7 0-4 2 3 4 6 8 10-3 2
3 4 6 8 10-2
2 3 4 6 810-1 2
3
.00029
---
Fall velocity, m/sec
Fig. 8.12
i
Particle settling velocity curves. (7)

li
it
i
it
i
rG!_------
;,
.
70
,I
4-1
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- ------ ----- -

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WHE
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64,
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lie
....... . ... ---------
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---------- --

to be reduced using step 2 to adjust the flow rate for the basin's volume. (It needs a 3.2"
diameter orifice.)
11/2" skimmer:
1,728
cubic feet in 24 hours
6,912 cubic feet in 4 days
with a 1'/2" head
3,456
cubic feet in 2 days
12,096 cubic feet in 7 days
5,184
cubic feet in 3 days
- es kii er:
3,283
cubic feet in 24 hours
13,132 cubic feet in 4 days
with awhead
6,566
cubic feet in 2 days
22,982 cubic feet in 7 days
9,849
cubic feet in 3 days
2'/2" skimmer:
6,234
cubic feet in 24 hours
24,936 cubic feet in 4 days
with a 2.5" head
12,468
cubic feet in 2 days
43,638 cubic feet in 7 days
Revised 11-6-07
18,702
cubic feet in 3 days
3" skimmer:
9,774
cubic feet in 24 hours
39,096 cubic feet in 4 days
with a 3" head
19,547
cubic feet in 2 days
68,415 cubic feet in 7 days.
29,322
cubic feet in 3 days
4" skimmer:
20,109
cubic feet in 24 hours
80,436 cubic feet in 4 days
with a 4" head
40,218
cubic feet in 2 days
140,763 cubic feet in 7 days
Revised 11-6-07
60,327
cubic feet in 3 days
5" skimmer:
32,832
cubic feet in 24 hours
131,328 cubic feet in 4 days
with a 4" head
65,664
cubic feet in 2 days
229,824 cubic feet in 7 days
98,496
cubic feet in 3 days
6" skimmer:
51,840 cubic feet in 24 hours
207,360 cubic feet in 4 days
with a 5" head
103,680 cubic feet in 2 days
362,880 cubic feet in 7 days
155,520 cubic feet in 3 days
8" skimmer:
97,978 cubic feet in 24 hours
391,912 cubic feet in 4 days
with a 6" head
195,956 cubic feet in 2 days
685,846 cubic feet in 7 days
CUSTOM
293,934 cubic feet in 3 days
MADE BY ORDER
CALL!
Determining the. Orifice
Step 2. To determine the orifice required to reduce the flow rate for the basin's volume -Wd the
number of days to drain the basin, simply use the formula volume _ factor (from the chart
below) for the same size skimmer chosen in the first step and the same number of days. This
calculation will give the area of the required orifice. Then calculate the orifice radius using Area
= rr r2 and solving for r, r = (Area/3.14) .The supplied cutter can be adjusted to this radius to
cut the orifice in the plug. The instructions with the plug and cutter has a ruler divided into tenths
of inches. Again, this step is not always necessary as explained above.
An alternative method is to use the orifice equation with the head for a particular skimmer
shown on the previous page a( mine the orifice needed to give the required flow for the
volume and draw down time. 0.5 is used in this chart.
Example: A 4" skimmer is the smallest skimmer that will drain 39,000 cubic feet in 3 days but a
4" inlet will drain the basin too fast (in 1.9 days) To determine the orifice required use the factor
of 4,803 from the chart below for a 4" skimmer and a drawdown time of 3 days. 39,000 cubic
November 6, 2007 2

- - ------- -
.1 hVJWIL.4,07'7'
Pv 5 Itee i,�,
3x �e. 1q, 4wo
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7-
. .........
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37 le
Ae le
- --- - ------------------
. .......... ------ - ----
--------- -

Z (slope)
3
Area
3.0007
Slope
0.05
Q (flow)
6,896561
n
0.068
depth
0.37
V
2.298317
Tau
1.1544
P
9.340085
R
0,321271
Width
7
Watershed:
basin 2
1,Y i1'� — lit+ 7 tf " k - vey ilovP4--
INSERT FLOW RATES HERE
Q2=
Q10=
Q25= 6.9
SLOPE= 0.05
Width= 7

it
i
C(e 7LO �ir"s� ✓ Lttg og/ 1r' 6/Ik VLlli ic.lil li l v!/% ! o
`u,'1-{ �- �' S u �,� le
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5
�I
45/1
1.5
I ) / e,
i
1

Appendices
,;n_
2C
J 1C
C
/0'/ r%7 Discharge (ft3/sec)
Curves may not be extrapolated.
Figure 8.06a Design of outlet protection protection from a round pipe flowing full, minimum tailwater condition (TW < 0.5 diameter).
a
4
3
a)
2 N
CO
a
ro
L
n.
rr
0
1 �
D•5 �
d�tJ-
Rev. 12/93
- 8.06.3

L-7
7f,I-f -'-
Or,�'6Y--t43
6.
411315 0,17 eq, 75'
q 2, 6 3
'12,017— 7t 2- 5- 6), 7—�
/0-V 073 1,6 &JA--Q,31
o U- 0.141
wqf-) 0,17 7, -Z_ �-3 012,2
7

44' f7
S tk ot I elf 'le
P4 re-41 441, 6, wef so v -,,v lte,�l
Ir r-so t v
" -V-Z- 7- 3- TOP
Fo V- C� 0 v I VI 474
i`LEV-a I e
ET- f
c 'o two
7y-ek 1 � Kee ef — tie`
0,-7

Id Alb l
J. `
Z (slope).
4
Watershed:
Area
1.949376
2-year
Slope
0.015
Q (flow)
7.197628
/
n
0.02
depth
0.312
V
3.692273
—
Tau
0.292032
P
7.572818
R
0.257418
Width
5
INSERT FLOW RATES HERE
Q2=
0.72
Q10=
Q25=
0
SLOPE=
0.015
Width=
5
For'V' Ditch
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (fus)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

L
Z (slope)
4
Watershed:
INSERT FLOW RATES HERE
Area
4.410636
2-year
Q2= 0.72
Slope
0,015
Q10=
Q (flow)
n
7.212051
0.065
-- v��u w �"r
Q25= 0
SLOPE= 0.015
depth
V
0.597
1.635
�^ f ;�� - ��v�
Width= 5
'V'
v,5,3 Wa
For Ditch
Tau
�-«
701
P
R
9.922988
0,444487
LEGEND:
Z- Side Slope (H:V) (unitless)
Width
5
�j pY�''�'
Area- (sq, ft)
Slope: Channel Slope (ft/ft)
e„
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
<- —
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
Area
Slope
Q (flow)
n
depth
V
Tau
P
R
Width
4
3.8664
0.015
4.799688
0.081
0.54
241384 d k
0.50544
9.452954
0.409015
5
Watershed: INSERT FLOW RATES HERE
10-year Q2=
0
Q 10=
4.8
Q25=
0
SLOPE=
0.015
Width=
5
For'V' Ditch
n .� off/ ek
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (Ib/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
Area
Slope
Q (flow)
n
depth
V
Tau
P
R
Width
4 Watershed:
2.342076 -year
0.092 2
7.1837
0.065
0.363
2.08 9 G
7. 93375�
0.293002
5
INSERT FLOW RATES HERE
Q2=
7.2
Q10=
Q25=
0
SLOPE=
0.092
Width=
5
For'V' Ditch
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
4
Watershed:
INSERT FLOW RATES HERE
Area
1.5704
2-year
Q2= 7.2
Slope
0.092
Q10=
Q (flow)
7.180693
Q25= 0
n
0.036
SLOPE= 0.092
depth
0.26
Width= 5
V
Tau
4.572525
1.492608
For'V' Ditch
P
7.144015
LEGEND:
R
0.21982
Z- Side Slope (H:V) (unitless)
Width
5
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
4
Watershed: INSERT FLOW RATES HERE
Area
1,926924
10-year Q2=
Slope
0.092
Q10= 4.8
Q (flow)
4.800728
Q25=
n
0.073
SLOPE= 0.092
depth
0.309
Width= 5
V
For'V' Ditch
R'0
Tau
. 7
P
7.548079
LEGEND:
R
0.255287
Z- Side Slope (H:V) (unitiess)
Width
5
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
x
Q: Flow (cfs)
_ w,� _, ��r ✓L �,U n: Manning's Coefficient (unitiess)
073 depth: flow depth (ft)
V: Velocity (ft/s)
vi Tau: Shear Stress (Ib/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
4
Watershed:
INSERT FLOW RATES HERE
Area
2.730684
25-year
Q2=
Slope
0.092
Q10=
Q (flow)
5.308758
Q25= 5.3
n
SLOPE= 0.092
depth
C
Width= 5
V
1.944113
For'V' Ditch
Tau
2.359469
P
8.389193
LEGEND:
R
0.3255
Z- Side Slope (H:V) (unitless)
Width
5
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
�!
(9
_
►��``�` 5
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
r
j�- !
V: Velocity (ft/s)
Tau: Shear Stress (Ib/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
Area
Slope
Q (flow)
n
depth
V
Tau
P
R
Width
4
Watershed:
1.286844
2-year
0.17
7.234246
0.036
0.219
5.621696 _
2.323152
6.80592
f1 h
0,189077
5
INSERT FLOW RATES HERE
Q2=
7.2
Q10=
Q25=
SLOPE=
0.17
Width=
5
For'V' Ditch
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
4
Watershed: INSERT FLOW RATES HERE
Area
2,623616
2-year Q2= 7.2
Slope
0.17
Q10=
Q (flow)
7.202022
Q25=
n
0.104
SLOPE= 0.17
depth
0.398
Width= 5
V
2.745075
For 'V' Ditch
Tau
4.221984
P
8.281992
LEGEND:
R
0.316786
Z- Side Slope (H:V) (unitless)
Width
5
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (Ib/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

i!
!I
_
Ll
. i � u� a � Z � s ff/f� � ✓ ��C � �� Gt i/'%i �� C� � /tj Gy ?��t' ! i �[�1"'� I r'V`
Ln e*,��
i
i
(I
-- _�
/� - �(,C In J
V i " �1
'�! OI��•7^
-. �,,,�
44
i
0,06'
4,7
V
LiE
�J
6,3 o, d.g5
1, 7

1
041
1
_ �
�����-�- vim'/��� �,`�/yl -�r� �`v �� Sf�d�i��� �,v,ft� �;f►���
_ '
u Yt�C� wlz�N Gd►�d 7�r�u a�rLl� .��'^ Lam'" O, �,� ���,�_�,L
z
M�r� fv f-41
i
,gyp +� �a
fV` 1r` AF� COWe �r4C kt7Y� �it�6�/�(f ,�'r�� CmW
i
1
1
-- r
I
162-" too �V f lye t yle-5
_ i
/ t,�(" , W r � P �,tK r✓� : //lr � � �?/'S r�l �%'yt �`Gj � �1/�(J �� / � t 2.. ;�j�`
-
a
i
Grk���ls A ,,;`I� �e�cy-'�►�/usr:�, /�5�4'���f _uE°K
uL;"e�
7 t
i

Z (slope)
4
Watershed
Area
3.634736
2-year
Slope
0.02
Q (flow)
16,67035
n
0.02
depth
V
�
Tau
0.401856
P
12.65528
R
0.287211
Width
10
INSERT FLOW RATES HERE
Q2=
16.7
Q10=
Q25=
SLOPE=
0.02
Width=
10
For'V' Ditch
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
4
Watershed:
Area
7.947824
2-year
Slope
0.02
Q (flow)
16.7021
n
0.005
depth
0.634
V
Tau
2.101468
.79
C t lb 2
P
15.2281
R
0.521918
E
Width
10
INSERT FLOW RATES HERE
Q2=
16.7
Q 10=
Q25=
SLOPE=
0.02
Width=
10
For 'V' Ditch
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (Ib/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
Area
Slope
Q (flow)
n
depth
V
Tau
P
R
Width
4
4.587264
0.02
5,291341
0.09
1.153485 0,
0.4 4208
13.2655
0.345804
10
Watershed: INSERT FLOW RATES HERE
10 Q2=
Q10= 5.3
Q25=
SLOPE= 0.02
Width= 10
For'V' Ditch
,j �'16, &161
fi,v b -v15
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (Ib/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
Area
Slope
Q (flow)
n
depth
V
Tau
P
R
Width
4
7,233584
0.02
6.295939
0.15
0,586
0.870376
0.731328
14.83228
0.487692
10
Watershed: INSERT FLOW RATES HERE
25-year Q2=
Q10=
Q25=
6.3
SLOPE-
0.02
Width=
10
For'V' Ditch
V r p
Q- 3
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
4
Watershed:
Area
3,310464
2-year
Slope
0.027
Q (flow)
16.76559
n
0.02
depth
0.29
V
064421
Tau
8701
P
12.44088
R
0.266096
Width
10
INSERT FLOW RATES HERE
Q2=
16.7
Q10=
Q25=
SLOPE=
0.027
Width=
10
For 'V' Ditch
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

61'7� 14 ;-j � --y �a v� �/! �1` f. �� / 5 : v� U z 7
Z (slope)
4
Watershed:
INSERT FLOW RATES HERE
Area
7.189556
2-year
Q2= 16.7
Slope
0.027
010=
Q (flow)
16,72898
Q25=
n
0.065
SLOPE= 0.027
depth
0.583
Width= 10
V
Tau
2.3
.982238
r 1�/
TL 6 r t 5 l Ff
For'V' Ditch
P
54
LEGEND:
R
0.485533
Z- Side Slope (H:V) (unitless)
Width
10
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (Ib/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
4
Watershed:
INSERT FLOW RATES HERE
Area
4.079796
10-year
Q2=
Slope
0.027
Q10= 5.3
Q (flow)
5.317442
Q25=
n
0.087
SLOPE= 0.027
depth
0.3
Width= 10
V
30 36
�%�
For 'V' Ditch
Tau
0. 4
P
12.9439
LEGEND:
R
0,315191
Z- Side Slope (H:V) (unitless)
Width
10
=
r l
Area- (sq. ft)
� j /�
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
67 Oo�
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (Ib/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
4 Watershed:
INSERT FLOW RATES HERE
Area
6.253296 25-year
Q2=
Slope
0.027
Q10=
Q (flow)
6.308718
Q25= 6.3
n
�:Q�4�
SLOPE= 0.027
depth
Width= 10
V
1.008863
For'V' Ditch
Tau
0.872726
P
14.27154
LEGEND:
R
0.438166
Z- Side Slope (H:V) (unitless)
Width
10
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
(�
Q: Flow (cfs)
�y
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
T
Tau: Shear Stress (Ib/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
Area
Slope
Q (flow)
n
depth
V
Tau
P
R
Width
4
Watershed
2.5709
2-year
0.059
16.715
0.02
0.23
501614
6
11.93786
0.215357
10
INSERT FLOW RATES HERE
Q2=
16.6
Q10=
Q25=
SLOPE=
0.059
Width=
10
For'V' Ditch
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (Ib/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft"3)
62.4

7
Aiklk 2-1
Z (slope)
Area
Slope
Q (flow)
n
depth
V
Tau
P
R
Width
4
Watershed:
5.528624
2-year
0.059
16.69473
0.065
0.466
3.019689
1.715626
13.84273
S /?
0.399388
10
INSERT FLOW RATES HERE
Q2=
16.6
Q10=
Q25=
SLOPE=
0.059
Width=
10
For'V' Ditch
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (Ib/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (Ib/ft^3)
62.4

Z (slope)
Area
Slope
Q (flow)
n
depth
V
Tau
P
R
Width
4
Watershed:
3.748244
2-year
0.059
16.67818
0.036
0.331
4.449597
T 4
1.21861
12,7295
0.294453
10
INSERT FLOW RATES HERE
Q2=
16.6
Q10=
Q25=
SLOPE=
0.059
Width=
10
For 'V' Ditch
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (Ib/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
4 Watershed:
INSERT FLOW RATES HERE
Area
3.1136 10-year
Q2=
Slope
0.059
Q10= 5.3
Q (flow)
5.302542
Q25=
n
depth
0.085
—023
SLOPE= 0.059
Width= 10
V
1.7 302
For'V' Ditch
Tau
848
P
12.30894
LEGEND:
R
0.252954
Z- Side Slope (H:V) (unitless)
Width
10
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
—
V: Velocity (ft/s)
J
Tau: Shear Stress (Ib/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

4
Z (slope)
Area
Slope
Q (flow)
n
depth
V
Tau
P
R
Width
4
4,825584
0.059
6,310007
0.14
<ZiiD
1.307615
1.524182
13.41393
0.359744
10
Watershed: INSERT FLOW RATES HERE
25-year Q2=
Q10=
Q25=
6.3
SLOPE=
0.059
Width=
10
For'V' Ditch
0 � = Z),
FW41 ,r,'
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
4
Watershed:
INSERT FLOW RATES HERE
Area
2.918784
2-year
Q2= 16.7
Slope
0.128
Q10=
Q (flow)
16.67753
Q25=
n
0.036
SLOPE- 0.128
depth
0.264
Width= 10
V
5.713861
7 ��
For 'V' Ditch
Tau
2.108621
P
12.177
7a" f
LEGEND:
R
0,239696
+%
Z- Side Slope (H:V) (unitless)
Width
10
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
_.
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
4
Watershed: INSERT FLOW RATES HERE
Area
5,832576
2-year Q2= 16.7
Slope
0.128
Q10=
Q (flow)
16.65741
Q25=
n
0.104
SLOPE= 0.128
depth
0.488
Width= 10
V
2.855926
For'V' Ditch
Tau
3.897754
P
14.02415
LEGEND:
R
0.415895
Z- Side Slope (H:V) (unitless)
Width
10
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (Ib/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
4
Watershed: INSERT FLOW RATES HERE
Area
4.852224
2-year Q2= 16.7
Slope
0.128
Q10=
Q (flow)
16.72703
Q25=
n
0.104
SLOPE= 0.225
depth
0.416
Width= 10
V
3.447292
For'V' Ditch
Tau
3.322675
P
13.43042
LEGEND:
R
0.361286
Z- Side Slope (H:V) (unitless)
Width
10
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (Ib/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

0
Design Procedure- The following is a step-by-step procedure for designing a runoff conveyance
Permissible Velocity channel using Manning's equation and the continuity equation:
Table 8.05b
Manning's n for Structural
Channel Linings
8.05.6
Step 1. Determine the required flow capacity, Q, by estimating peak runoff rate
for the design storm (Appendix 8.03).
Step 2. Determine the slope and select channel geometry and lining.
Step 3. Determine the permissible velocity for the lining selected, or the desired
velocity, if paved. (see Table 8.05a, pg. 8.05.4)
Step 4. Make an initial estimate of channel size —divide the required Q by the
permissible velocity to reach a "first try" estimate of channel flow area. Then
select a geometry, depth and top width to fit site conditions.
Step 5. Calculate the hydraulic radius, R, from channel geometry (Figure 8.05b,
pg. 8.05.5).
Step 6. Determine roughness coefficient n.
Structural Linings —see Table 8.05b, pg. 8.05.6.
Grass Lining:
a. Determine retardance class for vegetation from Table 8.05c, pg. 8.05.8.
To meet stability requirement, use retardance for newly mowed condition
(generally C or D). To determine channel capacity, use at least one
retardance class higher.
b. Determine n from Figure 8.05c, pg. 8.05.7.
Step 7. Calculate the actual channel velocity, V, using Manning's equation
(Figure 8.05a, pg. 8.05.3), and calculate channel capacity, Q, using the continu-
ity equation.
Step 8. Check results against permissible velocity and required design capacity
to determine if design is acceptable.
Step 9. If design is not acceptable, alter channel dimensions as appropriate. For
trapezoidal channels, this adjustment is usually made by changing the bottom
width.
Channel Lining
Recommended
n values
Asphaltic concrete, machine placed
0.014
Asphalt, exposed prefabricated
0.015
Concrete
0.015
Metal, corrugated
0.024
Plastic
0,013
Shotcrete
0.017
G ion
0.030
l; Earth
0.020
Source: American Society of Civil Engineers (modified)
Rev. 12193

U.
Table 8.05f Manning's Roughness Coefficient
Lining Category
Lining Type
n- value
n value for Depth Ranges
0-0.5 ft 0.5-2.0 ft
(0-15 cm) (15-60 cm)
2.0 ft
(> 60 cm)
Rigid
Concrete
0.015
0,013
0.013
Grouted Riprap
0.040
0.030
0,028
Stone Masonry
0.042
0,032
0.030
Soil Cement
0.025
0.022
0.020
Asphalt
0.018
0.016
0.016
Unlined
Bare Soil
0.023
0.020
0.020
Rock Cut
0.045
0.035
0.025
Gravel Riprap
1-inch (2.5-cm) D5o
0.044
0.033
0.030
2-inch (5-cm) D50
0.066
0.041
0.034
Rock Riprap
6-inch (15-cm) D5o
0.104
0.069
0.035
12-inch (30-cm) D5o
-
0.078
0.040
Note: values listed are representative values for the respective depth ranges. Manning's roughness coefficients, n, vary with the flow depth.
DETERMINING SHEAR STRESS
Shear stress, T, at normal depth is computed for the lining by the following
equation:
T=yds
Td = Permissible shear stress
where:
T = shear stress in lb/I't2
y = unit weight of water, 62.4 lb/ft3
d = flow depth in ft
s = channel gradient in ft/ft.
If the permissible shear stress, Td, given in Table 8.05g is greater than the
computed shear stress, the riprap or temporary lining is considered acceptable.
If a lining is unacceptable, select a lining with a higher permissible shear stress
and repeat the calculations for normal depth and shear stress. In some cases it
may be necessary to alter channel dimensions to reduce the shear stress.
Computing tractive force around a channel bend requires special considerations
because the change in flow direction imposes higher shear stress on the channel
bottom and banks. The maximum shear stress in a bend, Tb, is given by the
following equation:
Tb = KbT
where:

Lis
(continued)
Sample Problem 8.05a
Design of a
grass -lined channel.
Channel summary:
Trapezoidal shape, Z=3, b=3 ft, d=1.5 ft, grade = 2%
Note: In Sample Problem 8.05a the "n-value" is first choosen based
on a permissible velocity and not a design velocity criteria. Therefore
the use of table 8.05c may not be as accurate as individual retardance
class charts when a design velocity is the determining factor.
Tractive Force The design of riprap-lined channels and temporary channel linings is based on
Procedure analysis of tractive force.
Table 8.05e
Manning's Roughness
Coefficients for Temporary
Lining Materials
8.05.10
NOTE: This procedure is for uniform flow in channels and is not to be used
for design of deenergizing devices and may not be valid for larger channels
To calculate the required size of an open channel, assume the design flow is
uniform and does not vary with time. Since actual flow conditions change
through the length of a channel, subdivide the channel into design reaches as
appropriate.
PFRMISSIBLE SHEAR STRESS
The permissible shear stress, Td, is the force required to initiate movement of
the lining material. Permissible shear stress for the liner is not related to the
erodibility of the underlying soil. However, if the lining is eroded or broken, the
bed material will be exposed to the erosive force of the flow.
COMPUTING NORMAL DEPTH
The first step in selecting an appropriate lining is to compute the design
flow depth (the normal depth) and determine the shear stress.
Normal depths can be calculated by Manning's equation as shown for trapezoi-
dal channels in Figure 8.05d. Values of the Manning's roughness coefficient for
different ranges of depth are provided in Table 8.05e for temporary linings and
Table 8.05f for riprap. The coefficient of roughness generally decreases with
increasing flow depth.
n value for Depth Ranges*
0-0.5 ft
0.5-2.0 ft
>2.0 ft
Lining Type
Woven Paper Net
0.016
0.015
0.015
Jute Net
0.028
0.022
0.019
Fiberglass Roving
0.02
0.021
0.019
Straw with Net
0 5
0. , 3
0.025
Curled Wood Mat
6
0,035
0.028
Synthetic Mat
.0 6
0.025
0.021
* Adapted from: FHWA-HEC 15, Pg. 37 - April 1988
Rev. 12193

4 � ¢
Table 8.05g
Permissible Shear Stresses
for Riprap and Temporary
Liners
Appendices
Permissible Unit Shear Stress, Td
Lining Category
Lining Type
(lb/ft2)
Temporary
Woven Paper Net
0.15
Jute Net
0.45
Fiberglass Roving:
Single
0.60
Double
y a
trw with Net
V_A
`"Curled Wood -
tt �5,5�
ynthetic Mat
dso Stone Size (inches)
Gravel Riprap
1
0.33
0.67
Rock Riprap
6
2.00
3.00
12
4.00
15
5.00
18
-a-
21
7.90
24
8.00
Adapted From: FHWA, HEC-15, April 1983, pgs. 17 & 37.
Design Procedure- The following is a step-by-step procedure for designing a temporary liner for a
Temporary Liners channel. Because temporary liners have a short period of service, the.design Q
may be reduced. For liners that are needed for six months or less, the 2-yr
frequency storm is recommended.
Step 1. Select a liner material suitable for site conditions and application.
Determine roughness coefficient from manufacturer's specifications or Table
8.05e, pg. 8.05.10.
Step 2. Calculate the normal flow depth using Manning's equation (Figure
8.05d). Check to see that depth is consistent with that assumed for selection of
Manning's n in Figure 8.05d, pg. 8.05.11. For smaller runoffs Figure 8.05d is
not as clearly defined. Recommended solutions can be determined by using the
Manning equation.
i
Step 3. Calculate shear stress at normal depth.
Step 4. Compare computed shear stress with the permissible shear stress for
the liner.
Step 5. If computed shear is greater than permissible shear, adjust channel
dimensions to reduce shear or select a more resistant lining and repeat steps 1
through 4.
Design of a channel with temporary lining is illustrated in Sample Problem
8.05b, pg. 8.05.14.
8.05.13
Rev. _12J93

Appendices
Step 10. For grass -lined channels once the appropriate channel dimensions
have been selected for low retardance conditions, repeat steps 6 through 8 using
a higher retardance class, corresponding to tall grass. Adjust capacity of the
channel by varying depth where site conditions permit.
NOTE 1: If design velocity is greater than 2.0 ft/sec., a temporary lining
may be required to stabilize the channel until vegetation is established.
The temporary liner may be designed for peak flow from the 2-yr storm.
If a channel requires temporary lining, the designer should analyze shear
stresses in the channel to select the liner that provides protection and
promotes establishment of vegetation. For the design of temporary liners,
use tractive force procedure.
NOTE 2: Design Tables —Vegetated Channels and Diversions at the end
of this section may be used to design grass -lined channels with parabolic
cross -sections.
Ste 11. Check outlet for carrying capacity and stability. If discharge velocities
�.�_��.__..... P Y• g P Y Y• g
''~ = exceed allowable velocities for the receiving stream, an outlet protection struc-
'' ture will be required (Table 8.05d, pg. 8.05.9).
5
4
3
2
.08
CZ
,06
04
.02
Sample Problem 8.05a illustrates the design of a grass -lined channel.
Mel 1"myluel of
Longer than 30,, 7�
Him
�1�
...__,�o_......._
__.._
-�_'MMI®
IN
Pon
NORM
.4 .6 .8 1.0 2 4 6 8 10 20
VR, Product of Velocity and Hydraulic Radius
Figure 8.05c Manning's n related to velocity, hydraulic radius, and vegetal retardance.
Nate: From Sample Problem 8.05a multiply Vp x Hydralulic Radius (4.50.54=2.43), then enter the product of VR and extend a
straight line up to Retardance class "D", next project a straight line to the left to determine a trial manning's n.
Rev. 12/93 8.05.7

f
Table 8,05a
Maximum Allowable Design Velocities'
for Vegetated Channels
Typical Soil
Channel Slope Characteristicsz
Grass Lining
Permissible Velocity
Application
for Established Grass
Lining (ftlsec)
0-5% Easily Erodible
Bermuda rass_,„;...m..
5,0
Non -plastic
-'Tall f _„�� °_LL""
_ 0a
4;,
(Sands & Silts)
iaeg_rass
�.,.-.....4
Kentucky bluegrasss
4.5
Grass -legume mixture
3.5
Erosion Resistant
Bermudagrass
6.0
Plastic
Tall fescue
5.5
(Clay mixes)
Bahiagrass
5.5
Kentucky bluegrass
5.5
Grass -legume mixture
4.5
5-10% Easily Erodible
Bermudagrass
4.5
Non -plastic
Tall fescue
4.0
(Sands & Silts)
Bahiagrass
4.0
Kentucky bluegrass
4.0
Grass -legume mixture
3.0
Erosion Resistant
Bermudagrass
5.5
('lastic
Tall fescue
5.0
(Clay Mixes)
Bahiagrass
5.0
Kentucky bluegrass
5.0
Grass -legume mixture
3.5
>10% Easily Erodible
Bermudagrass
3.5
Non -plastic
Tall fescue
2.5
(Sands & Silts)
Bahiagrass
2.5
Kentucky bluegrass
2.5
Erosion Resistant
Bermudagrass
4.5
Plastic
Tall fescue
3.5
(Clay Mixes)
Bahiagrass
3.5
Kentucky bluegrass
3.5
Source: USDA-SCS Modified
NOTE: Permissible Velocity based on 10-yr storm peak runoff
3Soil erodibility based on resistance to soil movement from concentrated flowing
water.
Before grass is established, permissible velocity is determined by the type of temporary liner used.
8.05.4
Selecting Channel To calculate the required size of an open channel, assume the design flow is
uniform and does not vary with time. Since actual flow conditions change
Cross -Section throughout the length of a channel, subdivide the channel into design reaches,
Geometry and design each reach to carry the appropriate capacity.
The three most commonly used channel cross -sections are "W-shaped, par-
abolic, and trapezoidal. Figure 8.05b gives mathematical formulas for the area,
hydraulic radius and top width of each of these shapes.

g
Appendices
Riprap Mean Diameter, (ft) = d5oc
5 0 0.50 1.00 1 50 2 0
4
4
U 3
Qi
3
Q
0j 25
cti
20
U
to
° 15
10
5
0
50
45
40
35
CO
C7
30
25 p
20
CD
Ci
5
0
6
0.00 0.26 0.60 _..' 0.76 1.00 1.25
Figure 8.05k Steep slope riprap design, B = 4, Z = 3. Depth, d(ft) = do (flow depth)
Riprap can Dialr50.
0 .50 1.00 1.50 2 00
50
45
40
35
_ 30
Q
25
C77
co
U 20
(l�
10
-7 rim
5
0
0
0 0 2.50
5
Channel Slope,:
S (ft/ft)
5
o 40 4D
:) ry ry ry ry ^O
i
I '
1
I
50
46
40
36
U)
30
(Q
CD
26 C)
n
20
CD
16
10
6
0
0 .25 .50 .75 1.00 1.26
Figure 8.051 Steep slope riprap design, B = 6, z = 3. Depth, d(ft) = do (flow depth)
.v fTi
O T h ry ti w �
Channel Slope, S
S (ft/ft)
Rev. 12193
8.05.23
50
46
40
36
U)
30
(Q
CD
26 C)
n
20
CD
16
10
6
0
0 .25 .50 .75 1.00 1.26
Figure 8.051 Steep slope riprap design, B = 6, z = 3. Depth, d(ft) = do (flow depth)
.v fTi
O T h ry ti w �
Channel Slope, S
S (ft/ft)
Rev. 12193
8.05.23
Rev. 12193
8.05.23

Table 6.15b
Sizes for Riprap and Erosion
Control Stone Specified by
the N.C. Department of
Transportation
Practice Standards and Specifications
Riprap
Erosion Control
Class
Class
Class
1
2
Bss�
5 to 200 lb
25 to 250 lb
2" to 6"
5" to 15 "
30% shall
60% shall
weigh a
weigh a mini -
minimum of 60
imum of 100 lb
Ibs each
each
No more than
No more than
10% tolerance
10% shall
5% shall weigh
top and bot-
weigh less
less than 50 lb
tom sizes
than 15 lb
each.
each
Equally dis-
Equally dis-
tributed, no
tributed, no
gradation
gradation
specified
specified
source: North Carolina Aggregates Association.
on exposure to water or weathering, and suitable in all other respects for the pur-
pose intended. The specific gravity of the individual stones should be at least
2.5.
Size of stone —The sizes of stones used for riprap protection are determined by
Purpose and specific site conditions.
• Slope stabilization—Riprap stone for slope stabilization not subject to
flowing water or wave action should be sized for stability for the proposed
grade. The gradient of the slope to be stabilized should be less than the
natural angle of repose of the stone selected., Angle of repose of riprap
stones maybe estimated from Figure 6.15a.
Riprap used for surface stabilization of slopes does not add significant
resistance to sliding or slope failure and should not be considgLed a retain-
ing wall. The inherent stability of the soil must be satisfactory before
riprap is used for surface stabilization. Slopes approaching 1.5:1 may re-
quire special stability analysis.
• Outlet protection —Design criteria for sizing stone and determining the
dimensions of riprap pads at channel or conduit outlets are presented in
Practice 6.41, Outlet Stabilization Structure.
• Channel stabilization and streambank protection —Design criteria for
sizing stone for stability of channels are contained in Appendix 8.05.
Filter blanket —A filter blanket is a layer of material placed between the riprap
and the underlying soil to prevent soil movement into or through the riprap.
6.15.3

Lowther, Brian
From: Steve Jackson [[e-mail]]
Sent: Monday, December 07, 2009 1:54 PM
To: Lowther, Brian
Subject: Re: regarding pending stormwater discharge permit #NCG020749 (Tony Merritt)
Brian
Thanks for the rapid follow-up.
Indeed there are numerous issues with this particular facility that, in my lay opinion,
should be considered in the process of renewing the mining permit #68-04 and any additional
operating approvals under NCG020749.
Stormwater at this facility is collected and pumped into the nearby public water reservoir
(University Lake) as well as an adjacent, unpermitted storage pond.
According to this commercial website advertisement
http://www.le-inc.us/documents/7510 merritts gravel.pdf
the facility is operated partly as a landfill for construction waste.
Leachate from this uninspected landfill, coupled with 4+ decades of lubricant/hydraulic fluid
spills from on -site mechanical maintenance, is included in the untreated wastewater
discharge.
Also on the property is an uninspected, unapproved residential septic system.
I appreciate the opportunity to appraise your office of this and possibly additional
information.
regards
Steve Jackson
Lowther, Brian wrote:
> Mr. Jackson,
> The current status for NCG020749 is that we are waiting for their Mining Permit to be
renewed before we can issue our permit. We have the application and have been working on it
but we are waiting for the DLR permit to be renewed before we finish our review.
> Do you have any concerns or information about the mine that would be helpful in the permit
process?
> Thanks,
> Brian
> -----Original Message -----
> From: Steve Jackson [mailto:[e-mail]]
> Sent: Sunday, December 06, 2009 10:39 PM
> To: Lowther, Brian
1

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> Subject: regarding pending stormwater discharge permit #NCG020749
> (Tony Merritt)
— > Dear Mr Lowther:
>
>
> I am the representative of the homeowner's association for the
> subdivision directly adjacent to the mine in question.
> I would like to know the current status of this stormwater discharge
> permit application. This information will be shared with the other
> property owners.
> An e-mail response is fine, or, if you have questions I can be reached
> during business hours at 740-2345.
> Thank you.
> Steve Jackson
> Antler Point Homeowner's Ass'n.
> Chapel Hill
2

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NCG02 Stormwater Permit: Mining Permit review
Permit Number: NCG020733 Reviewer: JMJ
Mine Name: Tony Merritt's Gravel Pit
Last date of change to this forin: 8/13/08
Summary
• Receiving Stream: UT to Morgan Creek — University Lake
® Classification: WS-11, HOW, NSW, CA
e River Basin: Cape Fear
® County: Orange
® Notes: may be changing application to DLR — based
on info that they would dump fill from other sites on top of closed area— they cannot do as a
mine so must revise application to DLR. Additionally there was a mine adjacent Called Billy
Merritts Gravel Pit but it appears to be closed — it was at 1002 Smith Level Road
Regional Information
• Office:
o
❑ARO
Contact:
o
❑FRO
Contact:
o
❑MRO
Contact:
c
®RRO
Contact:
o
❑WaRO
Contact:
o
❑WiRO
Contact:
o
❑WSRO
Contact:
® Dates:
Danny Smith / Autumn Hoban
o Approval requested:
o Approval received:
o "No wetland impact" determination, (15A NCAC 02B .0231(b)(5)(f) requires the
Division to preserve the water levels of wetlands. We can require engineering plans
to ensure that this is the case.)
o Inspection:
Notes: WS-11 stream nearby. Will be requiring O&M as there may be STREAM IMPACTS.
Other Agency Information
® DLR
o Application submitted date:
o Approved date:
• DEH (if WS)
o Needed? ❑yes ❑no
o Application submitted date:
o Approved date:
o DLR Permit #:
• Shellfish Sanitation (if SA)
o Needed? Oyes ®no
o Application submitted date:
o Approved date:
a Notes:
Application Review
a) The permit application
not as of 8/14 — needs to be modified
8/14
not as of 8/ 14/08
68-04
Page 1 of 2

® Signed: ®yes ❑no
e Complete: ®yes ❑no
m SIC Code: S1C 14
i. Describes activities: ❑yes ®no —needs
clarification — only have 14 and needs to be more specific.
ii. Covered by permit: ®yes ❑no
b) Mine Type:
• Quarry: ❑
® Sand: ® sand and gravel and FILL
® Clay: ❑
e) Wastewater:
0 Type
- Mine dewatering:
- Stamped by PE?
- If clay & dewatering, ATC ?
- Process wastewater produced:
- Stamped by PE?
- If recycle & not closed, ATC?
Wastewater and ORW Waters Requirements
- New/expanding wastewater to ORW?
- New/expanding wastewater to
upstream of ORW?
- Notes:
®Yes
❑no
®yes
❑no
❑yes
[:]no (required)
❑yes
®no
❑yes
❑no
❑yes
Ono (required)
❑yes ❑no (not allowed)
Oyes Ono (special limits)
d) Other:
• Does this site drain to SWs with a TMDL? ❑yes ®no
• Does this facility have other NPDES permits? ❑yes ®no
® Hazardous waste activities onsite? ❑yes ®no
• Notes:
Communication logs
Date
Item
Response
8/13
Ask — what is your proper SIC code? 14 is not
adequate. Is it construction sand and gravel?
8/13
Is dewatering with chemical treatment occurring?
8/13
If mine site changing in DLR permit must change in
ours as well
8/13
Needs O&M must send to RRO
Page 2 of 2

Re: Tony Merritt's Gravel Pit
Subject: Re: Tony Merritt's Gravel Pit
From: Judy Wehner <[e-mail]>
Date: Thu, 13 Nov 2008 14:57:04 -0500
To: [e-mail]
not at this time. We denied the last request. In the meantime I received a call that
his lease expired. If they resubmit, they will have to prove they have a valid lease.
Jennifer Jones wrote:
Hey Judy,
Thanks for the info. Can you please elaborate? Do you have any written
conformation of this you can send me?
thanks,
Jennifer
Judy Wehner wrote:
I wouldn't count on it. They lost the lease on the land.
Jennifer Jones wrote:
Hi Judy,
I spoke to the consultant - Pat Schillington - for the Merritt Gravel Pit in
Oianye CuuiiLy. He sdia lie was yuiiiy Lu suLmiL d mudified miuiny permit to
you.
Additionally he said that they were going to have a public hearing on their
mining permit. Can you let Autumn and I know when this is going to happen.
If you don't know yet can you let us know when it is scheduled?
Thanks Judy!
Jen
1 of 1 11/14/2008 7:38 Al

Re: Tony Merritt's Gravel Pit
Subject: Re: Tony Merritt's Gravel Pit
From: Jennifer Jones <[e-mail]>
Date: Tue, 09 Dec 2008 07:17:51 -0500
To: Autumn Hoban <[e-mail]>, Danny Smith <[e-mail]>
Ok - sounds good! I will return today and let me know how the site visit goes!
Thanks y'all! (I'm practicing)
Jen
Autumn Hoban wrote:
Jen,
Nothing here, I have checked the mail since Friday.
Danny and I will follow up with a site visit as we indicated and go from there.
Please let us know, if you get an application anytime in the future.
Thanks a bunch
Autumn
Jennifer Jones wrote:
Hey Autumn,
I neither heard from nor recieved anything from TM's Gravel Pit. If you didn't
either I'll return it today!
Thanks!
Jen
Autumn Hoban
Environmental Specialist
NCDENR- Raleigh Regional Surface Water Protection
3800 Barrett Drive
Raleigh, NC 27609
Office [phone]
Fax [phone]
[e-mail]
http://h2o.enr.state.nc.us/
Jennifer Jones,
Environmental Engineer
NCDENR,l DWQ I Stormwater Permitting Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
512 N. Salisbury St, Raleigh, NC 27604
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: litt.p://h2o.enr.st.ate.i-c.us/sii/
1 of 1 12/9/2008 7:56 A

Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
December 9, 2008
Mr. Tony Merritt
Tony Merritt's Gravel Pit
3200 Damascus Church Road
Chapel Hill, NC 275161 ,
Return of NCG020733
Application Return #1200
Tony Merritt's Gravel Pit
Orange County
Dear Mr. Merritt:
Coleen H. Sullins Director
Division of Water Quality
On July 29, 2008 the NC Division of Water Quality's Stormwater Permitting Unit received your
Notice of Intent (NOI) to be covered under North Carolinas General Permit NCG020000. After
review.of the submitted material, -we are returning your request. for an NPDES General Permit as
you have not returned the additional information we have requested. Additionally, we
understand that the ownership and/or lease of your site is contested, and therefore your request
for a DLR permit and your DWQ permit cannot be granted until this issued is resolved.
Please note that we contacted you or your consultant(s) on August 13, August 14, November 3,
November 4, November 13, and December; 2008 in order to try to obtain the requested
additional information required to process your request. We had set additional information
receive -by dates as September 15, November 21, November 24, and December 5, 2008 - all of
which you have failed to meet. In our initial contact we stated we would return your application
if not received by September 15, 2008.
As you have egregiously passed the initial add information date and failed to meet all
subsequent dates we are returning your application submitted as such.
If you have any questions or concerns regarding your application or these forms, please contact
me at [phone].
Sincerely,
Jennifer Jones
Environmental Engineer
North Carolina Division of Water Quality, Stormwater Permitting Unit
NorthCarolina
vvaturally
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone [phone] Customer Service
Internet: www.ncwaterquality.org Location: 512 N. Salisbury St. Raleigh, NC 27604 Fax [phone]
An Equal Opportunity/Affirmative Action Employer— 50% Recycled110% Post Consumer Paper

Mr. Tony Merritt
Tony Merritt's Gravel Pit
December 9, 2008
cc: Raleigh Regional Office, Danny Smith, Autumn Hoban
DWQ Central Files
Stormwater Permitting Unit Files
Pat Schillington, Engineering & Environmental Science Company, 3008 Anderson Drive,
Suite 102, Raleigh, NC 27609
Enclosures

Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
August 14, 2008
Mr. Tony Merritt
Tony Merritt's Gravel Pit
3200 Damascus Church Road
Chapel Hill, NC 27516
Subject: General Permit No. NCG020000
COC No. NCG020733
Tony Merritt's Gravel Pit
Orange County
Dear Mr. Merritt:
Coleen H Sullins, Director
Division of Water Quality
The Division of Water Quality's Stormwater Permitting Unit received a National Pollutant Discharge
Elimination System (NPDES) permit application for Tony Merritt's Gravel Pit on July 29, 2008. The
application included a copy of an associated application for a mining permit submitted to the Division of
Land Resources (DLR). Please be aware that the issuance of an NPDES permit is contingent upon the
issuance of an associated mining permit from DLR. Our office will process your stormwater permit
application once a DLR mining permit has been issued for your project.
Please note that if your site plan and application to DLR is modified, then you must notify DWQ and
update your stormwater permit application. This permit application must be stamped and signed by a
Professional Engineer.
Please note that because your site discharges to WS-II waters, a DEH approval is required. Please
clarify the SIC code for your facility; for example SIC code 1442, 1446, and/or 1499.
Please also be aware that if your project is located near wetlands or streams, your NPDES permit
will require dewatering operations without wetland or stream impacts. The specific requirements for
mine dewatering at facilities near wetlands and streams can be found in the text of the general NPDES
mining permit number NCG 020000 available on our website,
http://h2o.enr.state.nc.us/su/Fonns_Documents.htm. See Section C, Part 1 of the permit on the page labeled,
"Part III Page 5 of 9". An approved Operation and Monitoring Plan is required for NPDES-permitted mining
facilities. Discharging mine dewatering wastewater without Plan approval will be subject to enforcement
action.
A Plan for your facility must be submitted to the Raleigh Regional Office before issuance of an NPDES
permit. We encourage you to contact Danny Smith at the Raleigh Regional Office at 919-791-4252 or
Autumn Hoban at 919-791-4247 to address any wetland or stream concerns for your facility in order to
ensure a successful NPDES application review. The requested O&M information should be received at this
office prior to Monday, September 15th, 2008, or the application will be returned as incomplete.
NMoCarolina
N17wa!!ly
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone [phone] Customer Service
Internet: www.newateEguality.org Location: 512 N. Salisbury St. Raleigh, NC 27604 Fax [phone]
An Equal Opportunity/Affirmative Action Employer— 50% Recycled/10% Post Consumer Paper

Mr. Tony Merritt
Tony Merritt's Gravel Pit — NCG020733
August 14, 2008
If you have any questions concerning the NPDES permit approval process, please contact me at
telephone number [phone].
Sincerely,
Jennifer Jones
Environmental Engineer
cc: Raleigh Regional Office, Danny Smith, Autumn Hoban
Central Files
Stormwater Permitting Unit Files
P o ` Carolina
.1174(rally
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone [phone] Customer Service
Internet: www.newaterquality.org ILocation: 512 N. Salisbury St. Raleigh, NC 27604 Fax [phone]
An Equal Opportunity/Affirmative Action Employer— 50% Recycled/10% Post Consumer Paper

0� \N Ar Michael F. Easley, Governor
;3 G William G. Ross Jr., Secretary
x1J North Carolina Department of Environment and Natural Resources
U Coleen H. Sullins, Director
Division of Water Quality
August 13, 2003
Memorandum
To: NCDENR Raleigh Regional Office, Michael Douglas, Department of Environmental Health
(DEH)
From: Jennifer Jones, Stormwater Permitting Unit
Subject: Review of the discharge location for the following: �G
Tony Merritts' Gravel Pit
Tony Merritt
3200 Damascus Church Road
Chapel Hill, NC 27516
Orange County
NCG020733 �'07
Please indicate your agency's position on the facility listed above. Attached is the staff t for is
facility. We cannot issue the permit without your concurrence. Please return this form at arliest
convenience.
RESPONSE: � �`I � c" /0 C:�tyt
va ,WP
This agency has reviewed the draft permit and determined that the proposed discharge will
not be sufficiently dose to any existing or known proposed public water supply intake so as to
create an adverse effect on water quality. We concur with the issuance of this permit,
provided the facility is operated and maintained properly, the stated effluent limits are met prior
to discharge, and the discharge does not contravene the designated water quality standards.
Concurs with issuance of th%'abov erm pr vided the folio in conditions are,met:
Opposes the issuance of the above permit, based on reasons stated below (or attached):
Signed A41
*A----- Date: qC
le
cc: Stormwater Permitting Unit Files
Attachments
MailingAddress Phone [phone] Location one
( ) No �thCarolina
1617 Mail Service Center Fax [phone] N. Salisbury St. 16Ztllrallf
Raleigh, NC 27699-1617 Raleigh, NC 27604
Internet: www.newateroualiry.ore Customer Service 1-877-623-6748
An Equal Opportunity/Affirmative Action Employer — 50% Recycled/10% Post Consumer Paper

Lowther, Brian
From: Romanski, Autumn
Sent: Tuesday, May 25, 2010 10:15 AM
To: Lowther, Brian
Subject: RE: additional information regarding pending stormwater discharge permit #NCG020749
Follow Up Flag: Follow up
Flag Status: Flagged
Brian,
The lab results are in from merritt mine inspection. Based on the inspection and lab results'
RRO concurs with the issuance of the NCG02 permit.
I have written the details of the inspection/sampling event in Bims. Please review and let
me know if you have edits/comments.
Let me know if you need anything further.
Thanks,
Autumn
-----Original Message -----
From: Lowther, Brian
Sent: Monday, May 17, 2010 4:36 PM
To: Romanski, Autumn
Subject: RE: additional information regarding pending stormwater discharge permit #NCG020749
Hey Autumn,
I am not sure if we are going to wait for their DLR permit to be renewed. I think they have
until July to get their bond in and that is what they are waiting on. I think we can issue
the permit if we want to. Do you have any concerns about issuing it before the DLR permit is
renewed? or do you think it would be better to get them under permit?
For your other facility, are they allowed to do that in their mining permit? Judy made it
sound like unless they were permitted they were not allowed to receive dump to fill the
mining area.
Brian
-----Original Message -----
From: Romanski, Autumn
Sent: Monday, May 17, 2010 3:33 PM
To: Lowther, Brian
Subject: RE: additional information regarding pending stormwater discharge permit #NCG020749
Yes, I am still waiting on the lab results and will forward a staff report as soon as I can
incorporate the sampling information. Are we going ahead with a SW permit renewal or are we
waiting on John Holley to confirm they have met DLR requirements? Just curious
I have another facility that does this same thing with regards to receiving dump (cement,
tree stumps) to fill mining area, and they also have not needed a permit- I think it is less
1

Qualitative Monitoring Form/
Evaluation for Non- tormw er�Dischar es
Site � <�
S PPP
STORMWATER OUTFALL OR CONVEYANCE OBSERVED: /; C,' l
The form needs to be completed each spring (April - June) and fall (September -
November). The form needs to be conducted in conjunction each stormwater
analytical monitoring event of the permit term (2008 - 2012).
Stormwater Observations (each outfall & conveyance):
- Visual Estimation of Flow Rate: % 5 C'; (Depth, Movement, Pipe Dia.)
-Color (_,_.. ' —
- Odor /- AL_
- Clarity-�_,-
Floating Solids
- Suspended Solids / i_
- Foam X_
-Oil Sheen ,4<-
- Erosion or Deposition at the Outfall i,% '1-_
- Other Obvious Indications of Stormwater Impact.
Certification
I certify that the observation indicated on this form was performed by me at the
location and date indicated.
Signature: / Date: �L
�� i
Printed Name: U ' . � -4L

than 2 acres, but Merritt may be less than 2 acres as well if that is the cutoff before
needing a permit.
Autumn
-----Original Message -----
From: Lowther, Brian
Sent: Monday, May 17, 2010 1:24 PM
To: Romanski, Autumn
Subject: RE: additional information regarding pending stormwater discharge permit #NCG020749
Hey Autumn,
I wanted to follow up with you on this site. I think I still need you to give me your
comments on whether or not I should issue the permit. Are you still waiting on the samples?
I can't remember how long you said that takes.
The main reason for the email was to let you know I followed up with DLR on this permit. I
talked with Judy Wehner. Bradley asked me to call her about the dumping the site has. She
said that it was an issue and that they would need a waste management permit if the dumping
area was over 2 acres. She also said the site could reclaim the areas as they were doing but
it currently is not covered in their DLR permit so they shouldn't be doing it. I think she
said it was going to be addressed in the renewal. Apparently, the engineer and permittee
have not been very cooperative with DLR. DLR's renewal permit will be issued once the
permiU ee pays the bond. The bond went up by a large amount for this renewal. i am not sure
how this all effects our permit but wanted to pass the information on before I forgot.
Brian
-----Original Message -----
From: Lowther, Brian
Sent: Friday, April 23, 2010 10:32 AM
To: Romanski, Autumn
Subject: RE: additional information regarding pending stormwater discharge permit #NCG020749
Autumn,
After talking with Bradley the other day about another mine I found out we can issue our
permit even if their mining permit is expired. They are still covered under their mining
permit even if it expired like our permits. You had suggested we do a site visit to document
the conditions on site before we issue the permit. I think we should go ahead and do this
when you have time. Just let me know when you would like to do the site visit. My schedule
is pretty open.
Brian
-----Original Message -----
From: Romanski, Autumn
Sent: Tuesday, February 02, 2010 12:19 PM
To: Lowther, Brian
Subject: RE: additional information regarding pending stormwater discharge permit #NCG020749
Brian,
There is a lot of feuding going on between neighbors here and the pics are of the sediment
ponds on site, none of which have overflowed at anytime I have investigated the site. I
walked the stream where they would overflow- and the rock dams that are in place seem to do a
z

Qualitative Monitoring Form/
Evaluation for Non-Stormwater Discharges
Site'P/ d — /
_
S PP
STORMWATER OUTFALL OR CONVEYANCE OBSERVED: cv C"
The form needs to be completed each spring (April - June) and fall (September -
November). The form needs to be conducted in conjunction each stormwater
analytical monitoring event of the permit term (2008 - 2012).
Stormwater Observations (each outfall & conveyance):
- Visual Estimation of Flow Rate: (Depth, Movement, Pipe Dia.)
- Color�_-
- Odor.
- Floating Solids
- Suspended Solids
-Foam /t,--f
-Oil Sheen
- Erosion or Deposition at the Outfall ,4,.. 1
- Other Obvious Indications of Stormwater Impact.
Certification
I certify that the observation indicated on this form was performed by me at the
location and date indicated.
Signature: i ��' Date: � 1'< ,
�? c
Printed Name:

great job of filtering the water and there is no sign of sediment loss to the creek. I have
photos and sample results from 2008.
This is a site I would recommend we visit together before a permit is issued and again take
photos/samples and document what is actually there now.
Neighbors likely not going to venture on this property with pack of dogs and the owners
keeping people out. You have to walk the site with the owner to understand what is actually
there.
Since 2008, when a brother turned over the property to another brother the permit could not
transfer, so new mining and new sw permit were needed. They have since applied and have been
working with DLQ. There is not much we can do - other than wait on DLQ permit and continue
to monitor. Suggest we venture out to the site when you are ready to move forward with the
SW permit and document the actual conditions prior to the issuance. They do receive material
in to fill the old mine area -again that is handled by DLQ.
Hope this helps.
Autumn
-----Original Message -----
From: Lowther, Brian
Sent: Tuesday, February 02, 2010 12:02 PM
To: Homanski, Autumn
Subject: FW: additional information regarding pending stormwater discharge permit #NCG020749
Autumn,
I got another email from a homeowner near Tony Merritt's Gravel Pit. He referenced a
discussion online about the site. The discussion has pictures from Bing.com that look to
show sediment coming from the mine. The discussion also references a lot of stuff that
wouldn't affect our permit. lust wanted to pass on the information. I also got the report
you forwarded me. It shows that the mine is not a source of fecal or sediment. I was still
a little concerned though when I read the conclusions and there were two exceptions for TSS
and Turbidity. Makes me concerned that there might really be more than two. What do you
think?
Brian
-----Original Message -----
From: Steve Jackson [mailto:[e-mail]]
Sent: Tuesday, February 02, 2010 11:14 AM
To: Lowther, Brian
Subject: additional information regarding pending stormwater discharge permit #NCG020749
Brian
There is some recent internet discussion regarding the permit #NCG020749.
This discussion includes web links to pictures of wastewater discharge, provided by a former
candidate for the Chapel Hill Town Council, and a comment from a person who sits on the OWASA
water utility board.
The discharge pictures do not fully disclose the scope and intensity of the worst -case
situations, but even so, they are revealing (and perhaps shocking).
3

The discussion and links to pictures are available at:
http://chapelhillwatch.wordpress.com/2010/02/01/doing-favors/#comments
Clearly, this remains a contentious local issue and one your department is likely quite
interested in monitoring.
regards
Steve Jackson
Lowther, Brian wrote:
> Steve,
> Thanks for the information. Our regional office staff has been to the
site and found
similar conditions. This site seems to have some issues we will have to
work through.
> If you check back with me I can keep you updated on the status of the
permit.
> Brian
> -----Original Message -----
> From: Steve Jackson [mailto:[e-mail]]
> Sent: Monday, December 07, 2009 1:54 PM
> To: Lowther, Brian
> Subject: Re: regarding pending stormwater discharge permit #NCG020749
(Tony Merritt)
> Brian
> Thanks for the rapid follow-up.
> Indeed there are numerous issues with this particular facility that, in
> my lay opinion, should be considered in the process of renewing the
> mining permit #68-04 and any additional operating approvals under NCG020749.
> Stormwater at this facility is collected and pumped into the nearby
> public water reservoir (University Lake) as well as an adjacent,
> unpermitted storage pond.
> According to this commercial website advertisement
> http://www.le-inc.us/documents/7510_merritts_gravel.pdf
> the facility is operated partly as a landfill for construction waste.
> Leachate from this uninspected landfill, coupled with 4+ decades of
> lubricant/hydraulic fluid spills from on -site mechanical maintenance,
is
> included in the untreated wastewater discharge.
> Also on the property is an uninspected, unapproved residential septic
> system.
4

SHEALY ENVIRONMENTAL SERVICES, INC.
Report of Analysis
ARM Environmental Services, Inc.
11164 Downs Road
Pineville, NC 28134
Attention: Dave Hunter
Project Name: Daimler - Mt. Holly SW
Project Number:N12-960-09
Lot Number:KJ13064
Date Completed:1012712009
Cy"___ -Lucas Odom
Project Manager
This report shall not be reproduced, except in its entirety, without the written approval of Shealy Environmental Services, Inc.
The following non -paginated documents are considered part of this report: Chain of Custody Record and Sample Receipt Checklist.
Shealy Environmental Services, Inc.
05 Vantage Point Drive West Columbia, SC 29172 [phone] Fax (II03) 791-9111 wuw.shealylab.coPage: 1 of 12
m
Level 1 Report v2.1

> I appreciate the opportunity to appraise your office of this and
> possibly additional information.
> regards
> Steve 7ackson
> Lowther, Brian wrote:
>>Mr. 7ackson,
>>The current status for NCG020749 is that we are waiting for their Mining Permit to be
renewed before we can issue our permit. We have the application and have been working on it
but we are waiting for the DLR permit to be renewed before we finish our review.
>>Do you have any concerns or information about the mine that would be helpful in the permit
process?
>>Thanks,
>>Brian
>> ----- Original Message -----
>>From: Steve 7ackson [mailto:[e-mail]]
>>Sent: Sunday, December 06, 2009 10:39 PM
>>To: Lowther, Brian
>>Subject: regarding pending stormwater discharge permit #NCG020749 (Tony Merritt)
>>Dear Mr Lowther:
>>I am the representative of the homeowner's association for the
>>subdivision directly adjacent to the mine in question.
>>I would like to know the current status of this stormwater discharge
>>permit application. This information will be shared with the other
>>property owners.
>>An e-mail response is fine, or, if you have questions I can be reached
>>during business hours at 740-2345.
>>Thank you.
>>Steve 7ackson
>>Antler Point Homeowner's Ass n.
>>Chapel Hill
5

SHEALY ENVIRONMENTAL SERVICES, INC.
SC DHEC No: 32010 NELAC No: E87653 NC DEHNR No: 329
Case Narrative
ARM Environmental Services, Inc.
Lot Number: KJ13064
This Report of Analysis contains the analytical result(s) for the sample(s) listed on the Sample Summary following this Case Narrative. The sample
receiving date is documented in the header information associated with each sample.
Sample receipt, sample analysis, and data review have been performed in accordance with the most current approved NELAC standards, the
Shealy Environmental Services, Inc. ("Shealy") Quality Assurance Management Plan (QAMP), standard operating procedures (SOPs), and Shealy
policies. Any exceptions to the NELAC standards, the QAMP, SOPS or policies are qualified on the results page or discussed below.
If you have any questions regarding this report please contact the Shealy Project Manager listed on the cover page.
Organochlorine Pesticides and PCBs
The result associated with sample -001 has a P qualifier for 4,4-DDT and Heptachlor because the relative percent difference (RPD) between the
two dissimilar phase GC columns exceeds 40%. In accordance with Section 7.10.4 of SW-846 method 8000B, the higher of the two results is
reported. Due to the disparity of the two results, it is likely that the reported result is biased high, or may be a false positive.
The surrogate decachlorobiphenyl failed marginally low for both runs of sample -001. No corrective action was required as the surrogate
tetra chloro-m-xylene recovered within limits.
Shealy Environmental Services, Inc.
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www sheaf.com labPage: Z of 12
y Level 1 Report v2 1

Y D
Lowther, Brian
From: Romanski, Autumn
Sent: Wednesday, June 09, 2010 1:03 PM
To: Lowther, Brian
Subject: RE: additional information regarding pending stormwater discharge permit #NCG020749
Brian,
I think RRO SWP will be inspecting them regularly, and the SPPP should be adequate (based on
the results of our site inspection and sampling event). 0 & M could be required later (next
permit cycle) if we find issues in the future.
Fecal is the only issue that appears to be intermittently causing citizen concern for this WS
II, but the dewatering is not the source of the fecal.
Hope this helps,
Autumn
-----Original Message -----
From: Lowther, Brian
Sent: Monday, June 07, 2010 4:47 PM
To: Romanski, Autumn
Subject: RE: additional information regarding pending stormwater discharge permit #NCG020749
Ok, Ken and I discussed this some more and think submitting an 0&M plan might not be helpful
since we only do them for wetlands. Ken was thinking we could get them to submit their SPPP
instead in our to deal with DEH concerns. What do you think?
Brian
-----Original Message -----
From: Lowther, Brian
Sent: Monday, June 07, 2010 4:40 PM
To: Romanski, Autumn
Subject: RE: additional information regarding pending stormwater discharge permit #NCG020749
Hey Autumn,
When I was going to issue this permit Ken pointed out that DEH (they were asked be it is an
WS-II) concurs with our issuance of the permit but say an 0&M plan is needed. I was going to
add this to the cover letter. We usually give the permittee 60 days to get approval from the
regional office but that is when they are by wetlands. Should I tell them they need your
approval of their 0&M before they can dewater or just tell them to develop and 0&M plan?
Brian
-----Original Message -----
From: Romanski, Autumn
Sent: Tuesday, May 25, 2010 10:15 AM
To: Lowther, Brian
Subject: RE: additional information regarding pending stormwater discharge permit #NCG020749
Brian,
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The lab results are in from merritt mine inspection. Based on the inspection and lab results
RRO concurs with the issuance of the NCG02 permit.
I have written the details of the inspection/sampling event in Bims. Please review and let
me know if you have edits/comments.
Let me know if you need anything further.
Thanks,
Autumn
-----Original Message -----
From: Lowther, Brian
Sent: Monday, May 17, 2010 4:36 PM
To: Romanski, Autumn
Subject: RE: additional information regarding pending stormwater discharge permit #NCG020749
Hey Autumn,
I am not sure if we are going to wait for their DLR permit to be renewed. I think they have
until July to get their bond in and that is what they are waiting on. I think we can issue
the permit if we want to. Do you have any concerns about issuing it before the DLR permit is
renewed? or do you think it would be better to get them under permit?
For your other facility, are they allowed to do that in their mining permit? Judy made it
sound like unless they were permitted they were not allowed to receive dump to fill the
mining area.
Brian
-----Original Message -----
From: Romanski, Autumn
Sent: Monday, May 17, 2010 3:33 PM
To: Lowther, Brian
Subject: RE: additional information regarding pending stormwater discharge permit #NCG020749
Yes, I am still waiting on the lab results and will forward a staff report as soon as I can
incorporate the sampling information. Are we going ahead with a SW permit renewal or are we
waiting on John Holley to confirm they have met DLR requirements? Just curious
I have another facility that does this same thing with regards to receiving dump (cement,
tree stumps) to fill mining area, and they also have not needed a permit- I think it is less
than 2 acres, but Merritt may be less than 2 acres as well if that is the cutoff before
needing a permit.
Autumn
-----Original Message -----
From: Lowther, Brian
Sent: Monday, May 17, 2010 1:24 PM
To: Romanski, Autumn
Subject: RE: additional information regarding pending stormwater discharge permit #NCG020749
Hey Autumn,
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I wanted to follow up with you on this site. I think I still need you to give me your
comments on whether or not I should issue the permit. Are you still waiting on the samples?
I can't remember how long you said that takes.
The main reason for the email was to let you know I followed up with DLR on this permit. I
talked with Judy Wehner. Bradley asked me to call her about the dumping the site has. She
said Lhat it was an issue and that they would need a waste management permit if the dumping
area was over 2 acres. She also said the site could reclaim the areas as they were doing but
it currently is not covered in their DLR permit so they shouldn't be doing it. I think she
said it was going to be addressed in the renewal. Apparently, the engineer and permittee
have not been very cooperative with DLR. DLR's renewal permit will be issued once the
permittee pays the bond. The bond went up by a large amount for this renewal. I am not sure
how this all effects our permit but wanted to pass the information on before I forgot.
Brian
-----Original Message -----
From: Lowther, Brian
Sent: Friday, April 23, 2010 10:32 AM
To: Romanski, Autumn
Subject: RE: additional information regarding pending stormwater discharge permit #NCG020749
Autumn,
After talking with Bradley the other day about another mine I found out we can issue our
permit even if their mining permit is expired. They are still covered under their mining
permit even if it expired like our permits. You had suggested we do a site visit to document
the conditions on site before we issue the permit. I think we should go ahead and do this
when you have time. Just let me know when you would like to do the site visit. My schedule
is pretty open.
Brian
-----Original Message -----
From: Romanski, Autumn
Sent: Tuesday, February 02, 2010 12:19 PM
To: Lowther, Brian
Subject: RE: additional information regarding pending stormwater discharge permit #NCG020749
Brian,
There is a lot of feuding going on between neighbors here and the pits are of the sediment
ponds on site, none of which have overflowed at anytime I have investigated the site. I
walked the stream where they would overflow- and the rock dams that are in place seem to do a
great job of filtering the water and there is no sign of sediment loss to the creek. I have
photos and sample results from 2008.
This is a site I would recommend we visit together before a permit is issued and again take
photos/samples and document what is actually there now.
Neighbors likely not going to venture on this property with pack of dogs and the owners
keeping people out. You have to walk the site with the owner to understand what is actually
there.
Since 2008, when a brother turned over the property to another brother the permit could not
transfer, so new mining and new sw permit were needed. They have since applied and have been
working with DLQ. There is not much we can do - other than wait on DLQ permit and continue
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to monitor. Suggest we venture out to the site when you are ready to move forward with the
SW permit and document the actual conditions prior to the issuance. They do receive material
in to fill the old mine area -again that is handled by DLQ.
Hope this helps.
Autumn
-----Original Message -----
From: Lowther, Brian
Sent: Tuesday, February 02, 2010 12:02 PM
To: Romanski, Autumn
Subject: FW: additional information regarding pending stormwater discharge permit #NCG020749
Autumn,
I got another email from a homeowner near Tony Merritt's Gravel Pit. He referenced a
discussion online about the site. The discussion has pictures from Bing.com that look to
show sediment coming from the mine. The discussion also references a lot of stuff that
wouldn't affect our permit. Just wanted to pass on the information. I also got the report
you forwarded me. It shows that the mine is not a source of fecal or sediment. I was still
a little concerned though when I read the conclusions and there were two exceptions for TSS
and Turbidity. Makes me concerned that there might really be more than two. What do you
think?
Brian
-----Original Message -----
From: Steve Jackson [mailto:[e-mail]]
Sent: Tuesday, February 02, 2010 11:14 AM
To: Lowther, Brian
Subject: additional information regarding pending stormwater discharge permit #NCG020749
Brian
There is some recent internet discussion regarding the permit #NCG020749.
This discussion includes web links to pictures of wastewater discharge, provided by a former
candidate for the Chapel Hill Town Council, and a comment from a person who sits on the OWASA
water utility board.
The discharge pictures do not fully disclose the scope and intensity of the worst -case
situations, but even so, they are revealing (and perhaps shocking).
The discussion and links to pictures are available at:
http://chapelhillwatch.wordpress.com/2010/02/01/doing-favors/#comments
Clearly, this remains a contentious local issue and one your department is likely quite
interested in monitoring.
regards
Steve Jackson
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Lowther, Brian wrote:
> Steve,
> Thanks for the information. Our regional office staff has been to the site and found
similar conditions. This site seems to have some issues we will have to work through.
> If you check back with me I can keep you updated on the status of the permit.
> Brian
> -----Original Message -----
> From: Steve Jackson [mailto:[e-mail]]
> Sent: Monday, December 07, 2009 1:54 PM
> To: Lowther, Brian
> Subject: Re: regarding pending stormwater discharge permit #NCG020749 (Tony Merritt)
> Brian
> Thanks for the rapid follow-up.
> Indeed there are numerous issues with this particular facility that, in
> my lay opinion, should be considered in the process of renewing the
> mining permit #68-04 and any additional operating approvals under NCG020749.
> Stormwater at this facility is collected and pumped into the nearby
> public water reservoir (University Lake) as well as an adjacent,
> unpermitted storage pond.
> According to this commercial website advertisement
> http://www.le-inc.us/documents/7510_merritts_gravel.pdf
> the facility is operated partly as a landfill for construction waste.
> Leachate from this uninspected landfill, coupled with 4+ decades of
> lubricant/hydraulic fluid spills from on -site mechanical maintenance, is
> included in the untreated wastewater discharge.
> Also on the property is an uninspected, unapproved residential septic
> system.
> I appreciate the opportunity to appraise your office of this and
> possibly additional information.
> regards
> Steve Jackson
> Lowther, Brian wrote:
>>Mr. Jackson,
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»The current status for NCG020749 is that we are waiting for their Mining Permit to be
renewed before we can issue our permit. We have the application and have been working on it
but we are waiting for the DLR permit to be renewed before we finish our review.
>>Do you have any concerns or information about the mine that would be helpful in the permit
process?
>>Thanks,
>>Brian
>> ----- Original Message -----
>>From: Steve 7ackson [mailto:[e-mail]]
>>Sent: Sunday, December 06, 2009 10:39 PM
>>To: Lowther, Brian
>>Subject: regarding pending stormwater discharge permit #NCG020749 (Tony Merritt)
>>Dear Mr Lowther:
>>I am the representative of the homeowner's association for the
>>subdivision directly adjacent to the mine in question.
>>I would like to know the current status of this stormwater discharge
>>permit application. This information will be shared with the other
>>property owners.
>>An e-mail response is fine, or, if you have questions I can be reached
>>during business hours at 740-2345.
>>Thank you.
>>Steve 7ackson
>>Antler Point Homeowner's Ass'n.
>>Chapel Hill
N.

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North Carolina Secretary of State
Page 1 of
North Carolina
DEPARTMENTOFTi.ie
Elaine F Marshall
4
Secretary SECRETARY OF STATE
PO Box, 29622 Raleigh, NC 2762E 0622 (9191807-2007
GORPORATIONS
Date: 7/9/2010
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NC MERRITT'S GRAVEL PIT, INC.
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SOSID:
1099875
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Agent Name:
MERRITT, TONY W.
idCSOS Authority to Dissolve
Office Address:
3200 DAMASCUS CHURCH ROAD
Register for E-Procurement
CHAPEL HILL NC 27516
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Mailing Address:
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http://www.secretary.state.nc.us/corporations/Corp.aspx?Pitemld=9122998 7/9/201

SOSID: 1099875
State of North Carolina Date Filed: 5/29/2009 2:52:00 PM
Department of the Secretary of State Elaine F. Marshall
North Carolina Secretary of State
ARTICLES OF INCORPORATION C200913900324
Pursuant to §55-2-02 of the General Statutes of North Carolina, the undersigned does hereby submit these Articles of
Incorporation for the purpose of forming a business corporation.
1. The name of the corporation is: MERRITT'S GRAVEL PIT, INC.
2. The number of shares the corporation is authorized to issue is: 10,000
3. These shares shall be: (check either a or b)
E a. all of one class, designated as common stock; or
b. divided into classes or series within a class as provided in the attached schedule,
with the information required by N.C.G.S. Section 55-6-01.
4. The street address and county of the initial registered office of the corporation is:
Number and Street 3200 Damascus Church Road
City chapel Hill State_ Zip Code 27516 —County Orange
5. The mailing address, if different from the street address, of the initial registered office is:
Number and Street
City
State Zip Code
6. The name of the initial registered agent is: Tony W. Merritt
7. Principal office information: (must select either a or b)
a. The corporation has a principal office.
The street address and county of the principal office of the corporation is:
Number and Street
County
City State Zip Code County
The mailing address, if different from the street address, of the principal office of the corporation is:
Number and Street
City State Zip Code County
■ b. The corporation does not have a principal office.
CORPORATIONS DIVISION P. O. BOX 29622 RALEIGH, NC 27626-0622
(Revised January, 2002)
(Form B-01)

8. Any other provisions, which the corporation elects to include, are attached.
9. The name and address of each incorporator is as follows:
Tony W. Merritt
3200 Damascus Church Road
Chapel Hill, NC 27516
10. These articles will be effective upon filing.
This the day of May, 2009.
ony W. Merritt, incorporator
CORPORATIONS DIVISION P. O. BOX 29622 RALEIGH, NC 27626-0622
(Revised January, 2002)
(Form B-01)

pEPARi(y
F BUSINESS CORPORATION
� ANNUAL REPORT
1-597-9122998
NAME OF BUSINESS CORPORATION: MERRITT'S GRAVEL PIT, INC.
FISCAL YEAR ENDING: STATE OF INCORPORATION: NC
SECRETARY OF STATE CORPORATE ID NUMBER: 1099875
NATURE OF BUSINESS:
REGISTERED AGENT: Merritt, Tony 6V.
REGISTERED OFFICE MAILING ADDRESS: 3200 Damascus Church Road
Chapel Hill, NC 27516
REGISTERED OFFICE STREET ADDRESS: 3200 Damascus Church Road
Chapel Hill, NC 27516 Orange County
SIGNATURE OF THE NEW REGISTERED AGENT:
SIGNATURE CONSTITUTES CONSENT TO THE APPOINTMENT
PRINCIPAL OFFICE TELEPHONE NUMBER:
PRINCIPAL OFFICE MAILING ADDRESS:
PRINCIPAL OFFICE STREET ADDRESS:
I;i IN I,[iJ1=109100(wa
Name:
Name:
Name:
Title:
Title:
Title:
Address:
Address:
Address:
City:
City:
City:
State: Zip:
State: Zip:
State: Zip:
CERTIFICATION OF ANNUAL REPORT MUST BE COMPLETED BY ALL BUSINESS CORPORATIONS
FORM MUST BE SIGNED BY AN OFFICER OF THE CORPORATION
DATE
TYPE OR PRINT NAME TYPE OR PRINT TITLE
ANNUAL REPORT FEE: $25 MAIL TO: Secretary of State • Corporations Division • Post Office Box 29525 • Raleigh, NC 27626-0525

AmnIF
_WWA Division of Water Quality / Surface Water Protection
NCD,. NR National Pollutant Discharge Elimination System
Vann C_wo C7F.RARna of
F"' JRONME,NT ANP N;rum, REsoincrS ^^//
N CGoiloo oo
NOTICE OF INTENT
FOR AGENCY USE ONLY
Date Received
Year
Month
I Day
O Cj
1 0 Lo
I O 5
Certificate of Coverage
NCG02o
Check #
Amount
Permit Assigned to
i
National Pollutant Discharge Elimination System application for coverage under General Permit
NCG020000:
STORMWATER DISCHARGES associated with activities classified as:
SIC (Standard Industrial Classification) Code -14XX Mineral Mining Industry (except as specified below)
The following activities are also included:
• Active or inactive mining operations (including borrow pits —except for NCDOT borrow pits) that discharge
stormwater contaminated with or that has come in contact with, any overburden, raw material, intermediate
products, finished products, byproducts or waste products located on the site of such operations;
• Stormwater from vehicle maintenance activities at mining operations;
• Overflow from facilities that recycle process wastewater; and/or
• Mine dewatering (wastewater)
The following activities are specifically excluded from coverage under this General Permit:
• Stormwater discharges associated with peat mining, coal mining, and metal mining;
• Stormwater discharges from mining operations which are intermixed on site with stormwater from asphalt
operations and/or concrete operations;
• Stormwater discharges associated with oil and gas extraction operations; and
• Stormwater discharges associated with tourist gem mines
• NCDOT borrow pits are covered under NCS000150
The following discharges are covered by NPDES general permit NCG520000 instead of NCG020000:
• Point source discharges of stormwater and wastewater from in -stream sand mining operations (i.e., sand
dredging or dipping operations)
For new mining sites that require an authorization to construct (ATC) wastewater treatment facilities: This
NOI is also an APPLICATION FOR an ATC for new wastewater treatment facilities. ATC requests must be
submitted at least 90 days prior to construction'.
For existin mining sites that require an Authorization to Operate (ATO) wastewater treatment facilities:
This NOI is also an APPLICATION FOR an ATO for wastewater treatment facilities in place.
Construction, modification, or installation of any new treatment components at an existing site requires
an ATC. (If the site is already covered by NCG020000, the ATC request may be submitted without an NOI).
Some wastewater treatment facilities used to treat or recycle process wastewater (even if commingled
with stormwater) at mining sites will require an ATC prior to construction per 15A NCAC 2H .0138.
Please see the NCG020000 General Permit for details about which treatment facilities require an
ATC (summarized in Table 1 at the end of this form). For example, an ATC is required for treatment
of mine dewatering discharge from clay pits and non -closed -loop wastewater recycle systems. The
authorization to construct or continue to operate will be issued at the same time as the Certificate of
Coverage (COC) for the NCG02 permit. Design of treatment facilities must comply with requirements
of 15A NCAC 21-1.0138 & .0139.
Page 1 of 7
'As per 15A NCAC 2H .0106
2Unless treatment facilities are designed, constructed, and put into operation by employees internal to the company who are qualified to
perform such work for their respective companies in accordance with General Statutes, 89C-25 (7), plans and specifications must be signed
and sealed by a P.E.
SWU-217-071408 Last revised 7/14/08

i�
NCENR
UazrH G.noul+.a CEr�wrrnEvr of
FlIV;p;�NME..�+.T 41(� h{Kfty'yV. !�F.9fJJ'l�:F$
NOTICE OF INTENT
Division of Water Quality / Surface Water Protection
National Pollutant Discharge Elimination System
NCG020000
FOR AGENCY USE ONLY
Date Received
Year
I Month
Dav
Certificate of Coverage
NCGO2
Check #
Amount
Permit Assigned to
National Pollutant Discharge Elimination System application for coverage under General Permit
NCG020000:
STORMWATER DISCHARGES associated with activities classified as:
SIC (Standard Industrial Classification) Code - 14XX Mineral Mining Industry (except as specified below)
The following activities are also included:
• Active or inactive mining operations (including borrow pits —except for NCDOT borrow pits) that discharge
stormwater contaminated with or that has come in contact with, any overburden, raw material, intermediate
products, finished products, byproducts or waste products located on the site of such operations;
• Stormwater from vehicle maintenance activities at mining operations; ,
• Overflow from facilities that recycle process wastewater; and/or
• Mine dewatering (wastewater)
The following activities are specifically excluded from coverage under this General Permit:
• Stormwater discharges associated with peat mining, coal mining, and metal mining;
• Stormwater discharges from mining operations which are intermixed on site with stormwater from asphalt
operations and/or concrete operations;
• Stormwater discharges associated with oil and gas extraction operations; and
• Stormwater discharges associated with tourist gem mines
• NCDOT borrow pits are covered under NCS000150
The following discharges are covered by NPDES general permit NCG520000 instead of NCG020000:
• Point source discharges of stormwater and wastewater from in -stream sand mining operations (i.e., sand.
dredging or dipping operations)
For new mining sites that require an authorization to construct (ATC) wastewater treatment facilities: This
NOI is also an APPLICATION FOR an ATC for new wastewater treatment facilities. ATC requests must be
submitted at least 90 days prior to construction'.
For existing mining sites that require an Authorization to Operate (ATO) wastewater treatment facilities:
This NOI is also an APPLICATION FOR an ATO for wastewater treatment facilities in place.
Construction, modification, or installation of any new treatment components at an existing site requires
an ATC. (If the site is already covered by NCG020000, the ATC request may be submitted without an NOI).
Some wastewater treatment facilities used to treat or recycle process wastewater (even if commingled
with stormwater) at mining sites will require an ATC prior to construction per 15A NCAC 2H .0138.
Please see the NCG020000 General Permit for details about which treatment facilities require an
ATC (summarized in Table 1 at the end.of this form). For example, an ATC is required for treatment
of mine dewatering discharge from clay pits and non -closed -loop wastewater recycle systems. The
authorization to construct or continue to operate will be issued at the same time as the Certificate of
Coverage (COC) for the NCG02 permit. Design of treatment facilities must comply with requirements
of 15A NCAC 2H .0138 & .0139.
Page 1 of 7
'As per 15A NCAC 2H .0106
2Unless treatment facilities are designed, constructed, and put into operation by employees internal to the company who are qualified to
perform such work for their respective companies in accordance with General Statutes, 89C-25 (7), plans and specifications must be signed
and sealed by a P.E.
SW U-217-012108 Last revised 1 /21 /08

NCG020000 N.O.I.
Construction of wastewater treatment facilities subject to the ATC/ATO requirements in the NCG02 permit
at new or existing mining sites requires submission of three (3) sets of plans and specifications signed
and sealed by a Professional Engineer (P.E.) or qualified staff2 along with this application. A copy of the
design calculations should be included. Please see questions 18 & 19.
Table 1: Wastewater Permit ATC/ATO Requirements
Mine Dewatering
Yes
No
Quarries
—
•
Sand Pits
—
•
Clay Pits
•
—
Any Dewatering with Chemical Treatment
•
—
Process Wastewater
Sand/Gravel
—
•
Closed -Loop Recycle
—
•
Other Recycle
•
—
For questions, please cuidact the DWQ Regional Office for your area. (See page 7)
(Please print or type)
1) Mailing address of owner/operator (address to which all permit correspondence will be mailed):
Name
Street Address
City
Telephone No.
E-mail Address
G Lruy/�f l��it , State � ZIP Code 2 7.7�1�d
-7 2- 3 Fax: Cd c YU —731Q
2) Location of facility producing discharge:
Facility Name 1 ��t1✓ %ItC'v'y,%`f S (��nvf �� f-
Facility Contact J c' W % rrr1-1Y'f"
Street Address
City GNy,ar! ifs!! State A-'G- ZIP Code �Z 7 "!
County G�ti
Telephone No. Z-6-'Z-�3 Fax: '?)cl 731
Contact E-mail
3) Physical Location Information:
Please provide a narrative description of how to get to the facility (use street names, state road numbers, and
distance and direction
jfrom
' a roadway intersection). Lriv� )wl ik� 1J7 �{5(ci &-44, .S -Pkc G'%^���Hsytiwvs7sr
,/ r'lll � l�l�l �U✓dr,lY .� GIi.Yi ��,G. � �yi j �'! G('/�l' �ili /1 �:..L'f' � �,1. Ir'� 7`{,�y✓/ / = fy �fl �'/
4) Latitude 7 7`- "�^7 Longitude ?cI-�25 �J (degrees, minutes, seconds)
/�rr'✓r 5 0 4 Pll S
5) This NPDES Permit NOi Application applies to which of the following:
❑ New or Proposed Facility
Existing
Date operation is to begin
❑ New Permit not applicable - ATC request only. NPDES Permit Number
Page 2of7
SWU-217-012108 Last revised 1/21/08

NCG020000 N.O.I.
6) Standard Industrial Classification:.
Provide the 4 digit Standard Industrial Classification Code (SIC Code) that describes the primary industrial
activity at this facility
SIC Code: I j4 P+
7) Provide a narrative description of the types of minerals mined at this facility: ju=�61aur��
�1��' /vc.u��� CulirU' f,•Lt�,'7%i'� �}�/% �.-u✓r�z lL�> d"�Cr55-j7=, /_a-tCl/kc/"
8) Discharge Points:
Number of discharge points (ditches, pipes, channels, etc. that convey discharges from the property):
Stormwater: I Mine dewatering: I Process Wastewater Overflow:
Discharge points should be clearly marked on the submitted site plan.
Please 1provide short narrative description of discharges:
1)ay,44j %{icy fY/wiG'. ..�j G.i` i-uc' /irrvlt lii�'�/' '))Ihl/ L"u";I uic.h'L�
i V1 l Le r / "9 I f ':v�t;
9) Receiving waters:
What is the name of the body or bodies of water (creek, stream, river, lake, etc.) that the facility stormwater
and/or wastewater discharges end up in? Oki a`o �!
If the site stormwater discharges to a separate storm sewer system, name the operator of he separate storm
sewer system (e.g. City of Raleigh municipal storm sewer). . `
Receiving water classification (if known):";;tyj
Note: Discharge of process wastewater to receiving waters classified as WS-II to WS-V or SA must
be approved by the N.C. Dept. of Environmental Health. If DEH does not approve, coverage
under NCG020000 cannot be granted. No new discharges of process wastewater are
permitted in receiving waters classified as WS-1 or freshwater ORW.
10) Will mining operations require dewatering near wetlands or impact any stream, groundwater, or wetlands?
V" No
❑ Yes If yes, please provide information about any 404/401 Certification permits.
Note: Wetlands must be CLEARLY DELINEATED on the site plan. Mine dewatering activities that have
the potential to drain wetlands or otherwise impact surface water or groundwater MUST develop and
implement an Operation and Monitoring (O&M) Plan that has been approved by the Division.
The O&M Plan should be submitted to the Regional Office and must be approved prior to operation.
The plan shall include, but is not limited to: (1) Groundwater monitoring strategies to demonstrate the
effect of pumping and to establish any pumping regime necessary to reduce impacts, and (2) Detailed
plans to maintain surrounding hydrology and respective monitoring to demonstrate compliance.
11) Does this facility already have a valid Mining Permit from the Division of Land Resources (DLR)?
❑ No (If not, please indicate the status of the Mining Permit application:
® Yes
If yes, please provide the Mining Permit number and include a copy with your application:
Note: DWQ cannot issue a COC for the NCGO20000 General Permit until a Mining Permit is issued or
renewed by the Division of Land Resources (DLR).
Page 3of7
SW U-217-012108 Last revised 1 /21 /08

NCG020000 N.O.I.
12) Will this mining operation precede development activities at this site?
X No
❑ Yes
13) Does this facility have any other NPDES permits?
No
❑ Yes
If yes, list the permit numbers for all current NPDES permits for this facility:
14) Does this facility have any Non -Discharge permits (ex: recycle permits)?
XNo
❑ Yes
If yes, list the permit numbers for all current Non -Discharge permits for this facility: _
15) Does this facility employ any best management practices for stormwater control?
❑ No
�' Yes
If yes, please briefly describe:
16) Dues this facility have a Stormwater Pollution Prevention Plan?
No
❑ Yes
If yes, when was it implemented?
17) Will vehicle maintenance activities occur at this facility?
X No ❑ Yes
Wastewater Treatment Facilities:
18) Will mine dewatering discharges occur? (ATC/ATO required for clay pits or dewatering with chem. treatment)
❑ No XYes
19) Will discharges of overflows from process wastewater treatment systems occur? (ATC or ATO required,
unless sand/gravel mining or closed -loop recycle system)
No ❑ Yes
If yes, answer the following questions on the wastewater treatment system:
a. Please describe the type of process used to treat and/or recycle the process wastewater. Give
design specifics (i.e. design volume, retention time, surface area, etc.). Existing treatment
facilities should be described in detail, and design criteria or operational data should be provided
(including calculations) to ensure that the facility can comply with requirements of the General
Permit. [Use separate sheet(s)]
b. Does this facility employ chemical additives to flocculate suspended solids? ❑ No ❑ Yes
If yes, please state the name, manufacturer and the quantity of average daily usage of the
chemical additive
Vote: Please see http://h2o.enr.state.nc.us/ws/PAMS list.htm for a list of approved polyacrylamide (PAMS)
products for use in North Carolina.
Page 4 of 7
SWU-217-012108 Last revised 1/21/08

NCG020000 N.O.I.
C. Does this facility overflow only during rainfall events exceeding the 10-yr, 24-hr rainfall event?
❑ No ❑ Yes
20) Are wastewater treatment facilities (including recycle systems) planned in the 100-year flood plain?
FyNo El Yes If so, include information to demonstrate protection from flooding. (Minimum design
requirements for treatment works include protection from the 100-year flood, per 15A NCAC 2H .0219.)
21) Hazardous Waste:
a) Is this facility a Hazardous Waste Treatment, Storage, or Disposal Facility?
,( No ❑ Yes
b) Is this facility a Small Quantity Generator (less than 1000 kg. of hazardous waste generated per month) of
hazardous waste?
X No ❑ Yes
c) Is this facility a Large Quantity Generator (1000 kg. or more of hazardous waste generated per month) of
hazardous waste?
X No ❑ Yes
d) If you answered yes to questions b. or c., please provide the following information:
Type(s) of waste:
How is material stored:
Where is material stored:
How many disposal shipments per year:
Name of transport / disposal vendor: _
Vendor address:
22) Certification: North Carolina General Statute 143-215.6 b (i) provides that:
Any person who knowingly makes any false statement, representation, or certification in any application, record, report, plan, or other
document filed or required to be maintained under this Article or a rule implementing this Article; or who knowingly makes a false
statement of a material fact in a rulemaking proceeding or contested case under this Article; or who falsifies, tampers with, or knowingly
renders inaccurate any recording or monitoring device or method required to be operated or maintained under this Article or rules of the
[Environmental Management] Commission implementing this Article shall be guilty of a Class 2 misdemeanor which may include a fine not to
exceed ten thousand dollars ($10,000).
I hereby request coverage under the referenced General Permit. I understand that coverage under this permit
will constitute the permit requirements for the discharge(s) and is enforceable in the same manner as an
individual permit.
I agree to abide by the following as a part of coverage under this General Permit:
1, I agree to abide by the approved Mining Permit for this mining activity. (A copy of the valid
mining permit must be attached to this request.
2. 1 agree to not discharge any sanitary wastewater from this mining activity except under the
provisions of another NPDES permit specifically issued therefore.
3. 1 agree that bulk storage of petroleum products and other chemicals shall have adequate
protection so as to contain all spills on the site.
4. 1 agree that solid wastes will be disposed of in accordance with N.C. statutes and rules
governing solid waste disposal.
5. 1 agree that maintenance activities for vehicles and heavy equipment will be performed so as to
not result in contamination of the surface or ground waters.
Page 5of7
S W U-217-012108 Last revised 1 /21 /08

NCG020000 N.O.I.
I agree to abide by the provisions as listed above and recognize that the provisions are to be considered as
enforceable requirements of the General Permit.
I certify that I am familiar with the information contained in this application and that to the best of my
knowledge and belief such information is true, complete, and accurate.
Printed Name of Person Signing: 100—4 7'die 04 e)24tt jf
Title:
nature of Applicant) ( ate Signe
Notice of Intent must be accompanied by a check or money order for $100.00 made payable to NCDENR.
Final Checklist
This application will be returned as incomplete unless all of the following items have been included:
Check for $100 made payable to NCDENR
This completed application and all supporting documents
jet Copy of the valid approved mining permit (MP) for the facility or indication of MP application status
Copy of a county map or other general location map that shows the mining site and nearest major roads
Copy of USGS topographic map showing the mining site and surrounding areas, or other map that clearly
shows site location in relation to nearby streams, wetlands, and other waters, etc.
Copy of mining site plan with all wetlands clearly delineated
❑ If the mine is near wetlands, or may otherwise impact surface water or groundwater, contact the regional
office about an O&M Plan (contact information on the next page). Please refer to this O&M Plan checklist:
✓ Site map with wetlands, ditches, well -placements, borrow areas, overburden storage, stormwater
controls/BMPs, vehicle maintenance areas, settling basins, product process areas, and access roads.
✓ Well information (design, depths, maintenance)
✓ Physical monitoring for the wetlands areas
✓ Settling pond sizing information, if applicable
✓ Level spreader design, if applicable
✓ Details about dewatering method
✓ Description of measures to prevent erosion and flooding
❑ If an ATC or ATO is required, three (3) sets of plans, specifications, and design calculations, signed,
sealed, and dated by a P.E. ATC and ATO requirements in NCG02000 are summarized in Table 1 on
Page 2 of this NO[ (see the permit text for more details). Plans shall show all pertinent design features,
including the location of the outfall(s). If stormwater is flowing off -site, the plan must show that stormwater
will not be mixed with wastewater.
Mail the entire package to:
Stormwater and General Permits Unit
Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Note
The submission of this document does not guarantee the issuance of an NPDES permit.
Page 6of7
5 W U-217-012108 Last revised 1 /21 /08

ME

` • Division of Water Quality / Surface Water Protection
National Pollutant Discharge Elimination System
N:. rm CA ouI UEFA Ew. of
Fimnon metiT Am NATUMU. Remino 6
NCG020000
NOTICE OF INTENT
FOR AGENCY USE ONLY
Date Received
Year
Month
Day
V~/
Certificate of Coverage
NICIGIO1210 1331
Check # Amount
fQi I j 1) :C>.7
.
Fennit Assigned to
National Pollutant Discharge Elimination System application for coverage under General Permit 10
NCG020000:
STORMWATER DISCHARGES associated with activities classified as:
SIC (Standard Industrial Classification) Code - 14XX Mineral Mining Industry (except as specified be&
The following activities are also included:
• Active or inactive mining operations (including borrow pits —except for NCDOT borrow pits) that d
stormwater contaminated with or that has come in contact with, any overburden, raw material, inti
products, finished products, byproducts or waste products located on the site of such operations;
• Stormwater from vehicle maintenance activities at mining operations;
Overflow from facilities that recycle process wastewater; and/or
• Mine dewatering (wastewater)
The following activities are specifically excluded from coverage under this General Permit:
ate
• Stormwater discharges associated with peat mining, coal mining, and metal mining;
• Stormwater discharges from mining operations which are intermixed on site with stormwater from asphalt
operations and/or concrete operations;
• Stormwater discharges associated with oil and gas extraction operations; and
• Stormwater discharges associated with tourist gem mines
• NCDOT borrow pits are covered under NCS000150
The following discharges are covered by NPDES general permit NCG520000 instead of NCG020000:
• Point source discharges of stormwater and wastewater from in -stream sand mining operations (i.e., sand
dredging or dipping operations)
For new mining sites that require an authorization to construct (ATC) wastewater treatment facilities: This
NOI is also an APPLICATION FOR an ATC for new wastewater treatment facilities. ATC requests must be
submitted at least 90 days prior to construction'. 4
For existin mining sites that require an Authorization to Operate (ATO) wastewater treatment facilities:
This NOI is also an APPLICATION FOR an ATO for wastewater treatment facilities in place.
Construction, modification, or installation of any new treatment components at an existing site requires
an ATC. (If the site is already covered by NCG020000, the ATC request may be submitted without an NOI).
Some wastewater treatment facilities used to treat or recycle process wastewater (even if commingled
with stormwater) at mining sites will require an ATC prior to construction per 15A NCAC 2H .0138.
Please see the NCG020000 General Permit for details about which treatment facilities require an
ATC (summarized in Table 1 at the end of this form). For example, an ATC is required for treatment
of mine dewatering discharge from clay pits and non -closed -loop wastewater recycle systems. The
authorization to construct or continue to operate will be issued at the same time as the Certificate of
Coverage (COC) for the NCG02 permit. Design of treatment facilities must comply with requirements
of 15A NCAC 2H .0138 & .0139.
Page 1 of 7
'As per 15A NCAC 2H .0106
21-Inless treatment facilities are designed, constructed, and put into operation by employees internal to the company who are qualified to
perform such work for their respective companies in accordance with General Statutes, 89C-25 (7), plans and specifications must be signed
and sealed by a P.E.
SW U-217-012108 Last revised 1121 /08

NCG020000 N.O.I.
Construction of wastewater treatment facilities subject to the ATC/ATO requirements in the NCG02 permit
at new or existing mining sites requires submission of three (3) sets of plans and specifications signed
and sealed by a Professional Engineer (P.E.) or qualified staff2 along with this application. A copy of the
design calculations should be included. Please see questions 18 & 19.
Table 1: Wastewater Permit ATC/ATO Requirements
Mine Dewatering
Yes
No
Quarries
Sand Pits
—
Clay Pits
®
_
Any Dewatering with Chemical Treatment
®
—
Process Wastewater
Sand/Gravel
—
Closed -Loop Recycle
—
Other Recycle
®
—
KW For questions, please contact the DWO Regional Office for your area. (See page 7)
(Please print or type)
1) Mailing address of owner/operator (address to which all permit correspondence will be mailed):
Name
��YtiV
s evv-itf-
Street Address
/�'Wec&
City
C 14aged
ld%/1 ,
Stated ZIP Code :7_ '7,J-14
Telephone No.
,t C/1JJ-'-2-43
Fax: elic( 5137-731
E-mail Address
2) Location of facility producing discharge:
Facility Name
k _�1�
tom, S" �✓' Vel
A Ir"'
Facility Contact
- ,/ Utif JUrVi,-J
"
Street Address
A-3
iJr� r� ��rS � u r�►
e ,
City
C 441ee!
, .11
State 141E ZIP Code
County
0v,4rw5 ry
Telephone No.
y _
- � fw✓
Fax: W9 1�?;Z--7 31
Contact E-mail
3) Physical Location Information:
Please provide a narrative description of how to get to the facility (use street names, state road numbers, and
distance and direction from a roadway intersection)..6=.. tk e /5 =3 h! h4-4- 4,4,g
4 Latitude `. '� = Longitude Lon J ri Ve j � e g" (degrees, minutes, seconds)
'7 da-z�f jzr e�
5) This NPDES Permit NOI Application applies to which of the following:
❑ New or Proposed Facility
Date operation is to begin
X Existing
❑ New Permit not applicable - ATC request only. NPDES Permit Number
Page 2 of 7
SWU-217-012108 Last revised 1/21/08

NCG020000 N.0.1.
6) Standard Industrial Classification:
Provide the 4 digit Standard Industrial Classification Code (SIC Code) that describes the primary industrial
activity at this facility
SIC Code:
7) Provide a narrative description of the types of minerals mined at this facility:
8) Discharge Points:
Number of discharge points (ditches, pipes, channels, etc. that convey discharges from the property):
Stormwater:t Mine dewatering: _� Process Wastewater Overflow:
Discharge points should be clearly marked on the submitted site plan.
Please provide short narrative description of discharges: d,;,h�u� ,f A`
Gil !1i' Al Ap ez e5-erB: -,1 Ja6,w4i...%kg >%� �°ter'h� e,r 1-E' ,ia'12e 1-4,71e e"llllrIt,J'I;i rt?/ 9 Lt cr14-
".r1 fr,s' a?ii;,.9ra ,..Fn 'r..dn r:� ✓l�tr,�9,s�sP 7�r,+ e:d .�a"t"®�3Ldrt•��- �sl1r�`7s
9) Receiving waters:
What is the name of the body or bodies of water (creek, stream, river, lake, etc.) that the facility stormwater
and/or wastewater discharges end up in? Ztiy �yNr ^u}��'��r 3w��� 4.-, , /e'k.
If the site stormwater discharges to a separate storm sewer system, name the operator of the separate storm
sewer system (e.g. City of Raleigh municipal storm sewer).
Receiving water classification (if known): G�S�_ � 1it%ryA_`41� 61),
Note: Discharge of process wastewater to receiving waters classified as WS-I1 to WS-V or SA must
be approved by the N.C. Dept. of Environmental Health. If DEH does not approve, coverage
under NCG020000 cannot be granted. No new, discharges of process wastewater are
permitted in receiving waters classified as WS-1 or freshwater ORW.
10) Will mining operations require dewatering near wetlands or impact any stream, groundwater, or wetlands?
No
❑ Yes If yes, please provide information about any 404/401 Certification permits.
Note: Wetlands must be CLEARLY DELINEATED on the site plan. Mine dewatering activities that have
the potential to drain wetlands or otherwise impact surface water or groundwater MUST develop and
implement an Operation and Monitoring (O&M) Plan that has been approved by the Division.
The O&M Plan should be submitted to the Regional Office and must be approved prior to operation.
The plan shall include, but is not limited to: (1) Groundwater monitoring strategies to demonstrate the
effect of pumping and to establish any pumping regime necessary to reduce impacts, and (2) Detailed
plans to maintain surrounding hydrology and respective monitoring to demonstrate compliance.
11) Does this facility already have a valid Mining Permit from the Division of Land Resources (DLR)?
❑ No (If not, please indicate the status of the Mining Permit application:
x
;KI Yes
If yes, please provide the Mining Permit number and include a copy with your application: 4 `' G, Le
Note: DWO cannot issue a COC for the NCGO20000 General Permit until a Mining Permit is issued or
renewed by the Division of Land Resources (DLR).
Page 3of7
SWU-217-012108 Last revised 1/21/08

NCG020000 N.O.I.
12) Will this mining operation precede development activities at this site?
No
❑ Yes
13)Does this facility have any other NPDES permits?
NNo
❑ Yes
If yes, list the permit numbers for all current NPDES permits for this facility:
14) Does this facility have any Non -Discharge permits (ex: recycle permits)?
No
❑ Yes
If yes, list the permit numbers for all current Non -Discharge permits for this facility:
15) Does this facility employ any best management practices for stormwater control?
❑ No
JN'Yes
If yes, please briefly describe:=ley Vr 5
16) Does this facility have a Stormwater Pollution Prevention Plan?
X No
❑ Yes
If yes, when was it implemented?
17) Will vehicle maintenance activities occur at this facility?
No ❑ Yes
Wastewater Treatment Facilities:
18) Will mine dewatering discharges occur? (ATC/ATO required for clay pits or dewatering with chem. treatment)
❑ No X Yes
19) Will discharges of overflows from process wastewater treatment systems occur? (ATC or ATO required,
unless sand/gravel mining or closed -loop recycle system)
No ❑ Yes
If yes, answer the following questions on the wastewater treatment system:
a. Please describe the type of process used to treat and/or recycle the process wastewater. Give
design specifics (i.e. design volume, retention time, surface area, etc.). Existing treatment
facilities should be described in detail, and design criteria or operational data should be provided
(including calculations) to ensure that the facility can comply with requirements of the General
Permit. [Use separate sheet(s)]
b. Does this facility employ chemical additives to flocculate suspended solids? ❑ No ❑ Yes
If yes, please state the name, manufacturer and the quantity of average daily usage of the
chemical additive
Note: Please see http://h2o.enr.state.nc.us/ws/PAMS list.htm for a list of approved polyacrylamide (PAMS)
products for use in North Carolina.
Page 4of7
SWU-217-012108 Last revised 1/21/08

NCG020000 N.O.I.
C. Does this facility overflow only during rainfall events exceeding the 10-yr, 24-hr rainfall event?
❑ No ❑ Yes
20) Are wastewater treatment facilities (including recycle systems) planned in the 100-year flood plain?
[ No ❑ Yes If so, include information to demonstrate protection from flooding. (Minimum design
requirements for treatment works include protection from the 100-year flood, per 15A NCAC 2H .0219.)
21) Hazardous Waste:
a) Is this facility a Hazardous Waste Treatment, Storage, or Disposal Facility?
,( No ❑ Yes
b) Is this facility a Small Quantity Generator (less than 1000 kg. of hazardous waste generated per month) of
hazardous waste?
X No ❑ Yes
c) Is this facility a Large Quantity Generator (1000 kg. or more of hazardous waste generated per month) of
hazardous waste?
No ❑ Yes
d) If you answered yes to questions b. or c., please provide the following information:
Type(s) of waste:
How is material stored:
Where is material stored:
How many disposal shipments per year:
Name of transport / disposal vendor: _
Vendor address:
22) Certification: North Carolina General Statute 143-215.6 b (i) provides that:
Any person who knowingly makes any false statement, representation, or certification in any application, record, report, plan, or other
document filed or required to be maintained under this Article or a rule implementing this Article; or who knowingly makes a false
statement of a material fact in a rulemaking proceeding or contested case under this Article; or who falsifies, tampers with, or knowingly
renders inaccurate any recording or monitoring device or method required to be operated or maintained under this Article or rules of the
[Environmental Management] Commission implementing this Article shall be guilty of a Class 2 misdemeanor which may include a fine.not to
exceed ten thousand dollars ($10,000).
I hereby request coverage under the referenced General Permit. I understand that coverage under this permit
will constitute the permit requirements for the discharge(s) and is enforceable in the same manner as an
individual permit.
I agree to abide by the following as a part of coverage under this General Permit:
1. I agree to abide by the approved Mining Permit for this mining activity. (A copy of the valid
mining permit must be attached to.this request.
2. 1 agree to not discharge any sanitary wastewater from this mining activity except under the
provisions of another NPDES permit specifically issued therefore.
3. 1 agree that bulk storage of petroleum products and other chemicals shall have adequate
protection so as to contain all spills on the site.
4. 1 agree that solid wastes will be disposed of in accordance with N.C. statutes and rules
governing solid waste disposal.
5. 1 agree that maintenance activities for vehicles and heavy equipment will be performed so as to
not result in contamination of the surface or ground waters.
Page 5of7
SWU-217-012108 Last revised 1/21/08

I agree to abide by the provisions as listed above and recognize that the provisions are to be considered as
enforceable requirements of the General Permit.
I certify that I am familiar with the information contained in this application and that to the best of my
knowledge and belief such information is true, complete, and accurate.
r
Printed Name of Person Signing: 104 !7 6"&z��-L
Title:
(Sjg�ature of Applicant) (Date Signed)
Notice of Intent must be accompanied by a check or money order for $100.00 made payable to NCDENR.
Final Checklist
This application will be returned as incomplete unless all of the following items have been included:
Check for $100 made payable to NCDENR
This completed application, and all supporting documents
Copy of the valid approved mining permit (MP),for the facility or indication of MP application status
Copy of a county map or other general location map that shows the mining site and nearest major roads
Copy of USGS topographic map showing the mining site and surrounding areas, or other map that clearly
shows site location in relation to nearby streams, wetlands, and other waters, etc.
Copy of mining site plan with all wetlands clearly delineated
❑ If the mine is near wetlands, or may otherwise impact surface water or groundwater, contact the regional
office about an O&M Plan (contact information on the next page). Please refer to this O&M Plan checklist:
✓ Site map with wetlands, ditches, well -placements, borrow areas, overburden storage, stormwater
controls/BMPs, vehicle maintenance areas, settling basins, product process areas, and access roads.
✓ Well information (design, depths, maintenance)
✓ Physical monitoring for the wetlands areas
✓ Settling pond sizing information, if applicable
✓ Level spreader design, if applicable
✓ Details about dewatering method
✓ Description of measures to prevent erosion.and flooding
❑ If an ATC or ATO is required, three (3) sets of plans, specifications, and design calculations, signed,
sealed, and dated by a P.E. ATC and ATO requirements in NCG02000 are summarized in Table 1 on
Page 2 of this NOI (see the permit text for more details). Plans shall show all pertinent design features,
including the location of the outfall(s). If stormwater is flowing off -site, the plan must show that stormwater
will not be mixed with wastewater.
Mail the entire package to:
Stormwater and General Permits Unit
Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Note
The submission of this document does not guarantee the issuance of an NPDES permit.
Page 6of7
SWU-217-012108 Last revised 1/21/08

NCG020000 N.O.I.
For questions, please contact the DWQ Regional Office for your area.
DWQ Regional Office Contact Information:
Asheville Office ......
[phone]
Fayetteville Office ...
[phone]
Mooresville Office ...
[phone]
Raleigh Office ........
[phone]
Washington Office ...(252)
946-6481
Wilmington Office ...
[phone]
Winston-Salem ......
[phone]
Central Office .........(919)
733-5083
Page 7 of 7
SWU-217-012108 Last revised 1/21/08

Cd
U

Permit: NCG020749 Effective:
SOC: Effective:
County: Orange
Region: Raleigh
Contact Person: Tony Merritt
Directions to Facility:
System Classifications:
Primary ORC:
Secondary ORC(s):
On -Site Representative(s):
Related Permits:
Compliance Inspection Report
Expiration: Owner: Tony Merritt
Expiration: Facility: Tony Merritt's Gravel Pit
3200 Damascus Church Rd
Chapel Hill NC 27516
Title: Phone: [phone]
Certification:
Phone:
1
Inspection Date: 04/27/2010 Entry Time: 10:30 AM Exit Time: 01:30 PM
Primary Inspector: Autumn H Romanski Phone: [phone]
Secondary Inspector(s):
Reason for Inspection: Routine Inspection Type: Compliance Evaluation
Permit Inspection Type: Mining Activities Stormwater Discharge COC
Facility Status: ❑ Compliant ❑ Not Compliant
Question Areas:
® Other
(See attachment summary)
Page: 1

Client:ARM Environmental Services, Inc. Laboratory ID: KJ13064-002
Description:Outfall-002 Matrix: Aqueous
Date Sampled:10/12/2009 1325
Date Received:10/13/2009
Surrogate
Run 1 Acceptance
Q % Recovery Limits
1,2-Dichloroethane-d4
96 52-138
Bromofluorobenzene
92 70-147
Toluene-d8
97 76-125
Semivolatile Organic Compounds by GC/MS
Run Prep Method
Analytical Method Dilution Analysis Date
Analyst
Prep Date
Batch
1 625
625 1 10/21/2009 1600
GLR
10/14/2009 2150
19616
CAS Analytical
Parameter
Number Method
Result Q
PQL
Units
Run
Acenaphthene
83-32-9
625
ND
5.1
ug/L
1
Acenaphthylene
208-96-8
625
ND
5.1
ug/L
1
Anthracene
120-12-7
625
ND
5.1
ug/L
1
Benzidine
92-87-5
625
ND
26
ug/L
1
Benzo(a)anthracene
56-55-3
625
ND
5.1
ug/L
1
Benzo(a)pyrene
50-32-8
625
ND
5.1
ug/L
1
Benzo(b)fluoranthene
205-99-2
625
ND
5.1
ug/L
1
Benzo(g,h,i)perylene
191-24-2
625
ND
5.1
ug/L
1
Benzo(k)fluoranthene
207 08 0
G25
ND
b.1
ug/L
1
4-Bromophenyl phenyl ether
101-55-3
625
ND
5.1
Butyl benzyl phthalate
85-68-7
625
ND
10
ug/L
1
4-Chloro-3-methyl phenol
59-50-7
625
ND
5.1
ug/L
1
bis(2-Chloroethoxy)methane
111-91-1
625
ND
5.1
ug/L
1
bis(2-Chloroethyl)ether
111-44-4
625
ND
5.1
ug/L
1
bis(2-Chloroisopropyl)ether
108-60-1
625
ND
ug/L
1
2-Chloronaphthalene
91-58-7
625
ND
5.1
5.1
ug/L
1
2-Chlorophenol
95-57-8
625
ND
5.1
ug/L
1
4-Chlorophenyl phenyl ether
7005-72-3
625
ND
5.1
ug/L
1
Chrysene
218-01-9
625
ND
5.1
ug/L
ug/L
1
1
Di-n-butyl phthalate
84-74-2
625
ND
5.1
ug/L
1
Di-n-octylphthalate
117-84-0
625
ND
5.1
ug/L
1
Dibenzo(a,h)anthracene
53-70-3
625
ND
5.1
ug/L
1
1,2-Dichlorobenzene
95-50-1
625
ND
51
ug/L
1,3-Dichlorobenzene
541-73-1
625
ND
uglL
'
1,4-Dichlorobenzene
106-46-7
625
ND
5.1
uglL
3,3'-Dichlorobenzidine
91-94-1
625
ND
26
2,4-Dichlorophenol
120-83-2
625
ND
ug/L
1
Dletnylphthalate
3 So-2
025
ND
L
Dimethyi phthalate
131-11-3
625
ND
5.1
ug/L
1
2,4-Dimethylphenol
105-67-9
625
ND
51
ug/L
1
4,6-Dinitro-2-methylphenol
534-52-1
625
ND
26
2,4-Dinitrophenol
51-28-5
625
ND
26
ug/L
1
2,4-Dinitrotoluene
121-14-2
625
ND
10
ug/L
1
2,6-Dinitrotoluene
606-20-2
625
ND
ug/L
1
10
ug/L
1
PQL = Practical quantitation limit B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
ND = Not detected at or above the PQL J = Estimated result < PQL and > MDL P = The RPD between two GC columns exceeds 40 %
Where applicable, all soil sample analysis are reported on a dry weight basis unless flagged with a "W" N = Recover is out of criteria
y H =Out of holding time
Shealy Environmental Services, Inc.
Page: 106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.sheal y lab.com Level i Re of 12
Report v2.1

4'
Permit: NCG020749 Owner - Facility: Tony Merritt
Bria 0Rbd 98ntoRoma § - ✓1S'dl >r l�� a e �ftu fdf� sampling event for the pu g�g„q��g�LY.M tine
spection $umma
e site mines sanT and gravel for use in construction foundations and the site accepts beneficial fill (tree stumps and
cement) that is used to fill in the old mining pit. The site has a DLR sediment and erosion control permit that is currently
being renewed. A NPDES NCG02 Stormwater permit was previously issued to Billy Merritt for this site, but the current
applicant is Tony Merritt. The site contains dewatering/stormwater basin #1 by the active sand/gravel mine pit, a
stormwater pond #2 located on east side of property by UT to Price Creek below the old pit (that has been filled). There
was a third stormwater pond (depicted as possible future 1.95 acre lake) located along the north side of the old pit that
was sampled, but it was unclear if that was part of future expansion or if that was part of the footprint for which the
stormwater mining application was being made.
Observations of the basins revealed the following:
One rock dam located upstream from the #2 stormwater pond is failing and moving towards the UT to Price Creek. It was
recommended that the rock dam be repaired as soon as possible to prevent gravel/fill loss to the stream. No fill was
observed in the stream the day of the inspection.
Some erosion of the stream bank (UT to Price Creek) near the #2 stormwater pond was observed (this area appeared to
be a scour area along the bank of the stream where flow is undercutting a tree in the bank and the tree is unstable. This
area of the stream is buffered by large trees, in general. It is recommended that the #2 stormwater pond overflow (rock
dam) be maintained and flow be controlled as much as possible (by the stormwater design requirements) to minimize any
effects additional stormflow could produce, and to minimize the risk of gravel/sediment loss to the creek at this location.
The #2 stormwater pond was not discharging the day of the inspection and no fill was in the stream. The UT to Price
Creek sample results taken in the creek at the #2 Stormwater Discharge outlet did not show exceedances of water
quality standards (except Iron was 1,600 ug/L, and Iron was significantly lower at the other sample locations), the water
was clear and free of solids, the day of the inspection.
The #1 stormwater basin was also sampled with no results exceeding water quality standards. Mine dewatering is
conducted here and the flow goes through a rock dam, approx. 300 + foot tree buffer, and appears to sheet flow before
reaching the UT to Price Creek. Again, we recommend maintenance of the rock dam as needed and controlled flow
releases per stormwater basin design requirements. Also, a pump was observed for dewatering at this location.
Preventative measures should be taken on -site to ensure that oil and hydraulic fluids are not spilled during pumping
operations.
The stormwater pond observed that was depicted on map as (future 1.95 acre lake) was sampled and observations noted
as follows: No results exceeded water quality standards. The pond sits in the valley below the old pit filled with beneficial
fill and and it was unclear where it would discharge when full, but the valley does hold stormwater here and the area is
likely groundwater fed as well. It was unclear as to whether this would become a lake in the future.
Upon leaving the site, we observed a cement pad with water hose and water access. It was unclear what this pad is used
for, but it appeared to be used for family cars, possibly washing or maintenance, but did not appear to be used for
commercial equipment. It is recommended that clarification be made with regards to vehicle and maintenance activities
that occur on -site and compliance with permit requirements with this regards to the NCG02 will be expected in any future
compliance inspections.
P.E. Patrick Shillington, engineer for the site owner met us on site to answer questions.
The site owners Attorney's Office contacted us by phone during the inspection to request the reason why we were
inspecting the site and sampling. We communicated that the owner allowed us on -site to do an inspection and sample as
part of the stormwater permit application and review process.
*Based on the findings the day of the inspection, and previous site visits by the RRO, RRO has no objections to the
issuance of the NCG020749 stormwater permit.
Page: 2

Client:ARM Environmental Services, Inc. Laboratory ID: KJ13064-002
Description: Outfall-002 Matrix: Aqueous
Date Sampled:10112/2009 1325
Date Received: 10/1312009
Semivolatile Organic Compounds by GC/MS
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 625 625 1 10/21/2009 1600 GLR 10/14/2009 2150 19616
Parameter
1,2-Diphenylhydrazine(as azobenzene)
bis(2-Ethylhexyl)phthalate
Fluoranthene
Fluorene
Hexachlorobenzene
Hexachlorobutadiene
Hexachlorocyclopentadiene
Hexachloroethane
Indeno(1,2,3-c,d)pyrene
Isophorone
N-Nitrosodi-n-propylamine
N-Nitrosodimethylamine
N-Nitrosodiphenylamine (Diphenylamine)
Naphthalene
Nitrobenzene
2-Nitrophenol
4-Nitrophenol
Pentachlorophenol
Phenanthrene
Phenol
Pyrene
1,2,4-Trichlorobenzene
2,4,6-Trichlorophenol
Surrogate
2,4,6-Tribromophenol
2-Fluorobiphenyl
2-Fluorophenol
Nitrobenzene-d5
Phenol-d5
Terphenyl-d 14
CAS
Number
103-33-3
117-81-7
206-44-0
86-73-7
1 18-74-1
87-68-3
77-47-4
67-72-1
193-39-5
78-59-1
621-64-7
62-75-9
86-30-6
91-20-3
98-95-3
88-75-5
100-02-7
87-86-5
85-01-8
108-95-2
129-00-0
120-82-1
88-06-2
Run
1 Acceptant(
Q % Recovery Limits
114
41-144
77
37-129
62
24-127
63
38-127
72
28-128
95
10-148
Analytical
hod
Result Q
PQL
Units
Run
625
ND
5.1
ug/L
1
625
ND
5.1
ug/L
1
625
ND
5.1
ug/L
1
625
ND
5.1
ug/L
1
625
ND
5.1
ug/L
1
625
ND
5.1
ug/L
1
625
ND
26
ug/L
1
625
ND
5.1
ug/L
1
625
ND
5.1
ug/L
1
625
ND
5.1
ug/L
1
625
ND
5.1
ug/L
1
625
ND
5.1
ug/L
1
625
ND
5.1
ug/L
1
625
ND
5.1
ug/L
1
625
ND
5.1
ug/L
1
62S
NL)
10
ug/L
1
625
ND
26
ug/L
1
625
ND
26
ug/L
1
625
ND
5.1
ug/L
1
625
ND
5.1
ug/L
1
625
ND
5.1
ug/L
1
625
ND
5.1
ug/L
1
625
ND
5.1
ug/L
1
Organochlorine
Pesticides and PCBs
Run Prep Method
Analytical Method
Dilution Analysis Date Analyst Prep Date
Batch
1 608
608
1 10/26/2009 1715 ASB 10/14/2009 2200
19613
2 608
608
1 10/21/2009 0345 NCM 10/14/2009 2200
19613
Parameter
CAS Analytical
Number Method Result Q
PQL
Aldrin
309-00-2 608 ND
0.025
Units Run
ug/L 1
PQL = Practical quanlitation limil 8 = Detected in the method blank E = Quantitation of compound exceeded the calibration range
ND = Not detected at or above the PQL J = Estimated result < PQL and - MOIL P = The RPD between two GC columns exceeds 40%
Where applicable, all soil sample analysis are reported on a dry weight basis unless Flagged with a "W" N = Recovery is out of criteria H = -
Out of holding time
Shealy Environmental Services, Inc.
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.shealylab.com Page: Level 1 Report
of 12
eport v2.1

Permit: NCG020749 Owner - Facility: Tony Merritt
Inspection Date: 04/27/2010 Inspection Type: Compliance Evaluation
Reason for Visit: Routine
Other Yes No NA NE
Comment: See summary
Page: 3

Client:ARM Environmental Services, Inc.
Description: Outfall-002
Date Sampled:10/12/2009 1325
Date Received:10/13/2009
Laboratory ID: KJ13064-002
Matrix: Aqueous
Organochlorine Pesticides and PCBs
Run Prep Method
Analytical Method Dilution Analysis Date
Analyst
Prep Date
Batch
1 608
608 1 10/26/2009 1715
ASB
10/14/2009 2200
19613
2 608
608 1 10/21/2009 0345
NCM
10/14/2009 2200
19613
Parameter
CAS Analytical
Number Method
Result Q
PQL
alpha-BHC
319-84-6
608
ND
0.025
beta-BHC
319-85-7
608
ND
0.025
delta-BHC
319-86-8
608
ND
0.025
gamma-BHC (Lindane)
58-89-9
608
ND
0.025
Chlordane
57-74-9
608
ND
0.25
4,4'-DDD
72-54-8
608
ND
0.025
4,4'-DDE
72-55-9
608
ND
0.025
4,4'-DDT
50-29-3
608
ND
0,025
Dieldrin
60-57-1
608
ND
0.025
Endosulfan 1
959-98-8
608
ND
0.025
Endosulfan II
33213-65-9
608
ND
0,025
Endosulfan sulfate
1031-07-8
608
ND
0.025
Endrin
72-20-8
608
ND
0.025
Endrin aldehyde
7421-93-4
608
ND
0.025
Heptachlor
76 44 8
G08
ND
0.025
Heptachlor epoxide
1024-57-3
608
ND
0.025
Toxaphene
8001-35-2
608
ND
0.25
Aroclor 1016
12674-11-2
608
ND
0.25
Aroclor 1221
11104-28-2
608
ND
0.25
Aroclor 1232
11141-16-5
608
ND
0.25
Aroclor 1242
53469-21-9
608
ND
0.25
Aroclor 1248
12672-29-6
608
ND
0.25
Aroclor 1254
11097-69-1
608
ND
0.25
Aroclor 1260
11096-82-5
608
ND
0.25
Surrogate
g
Run 1 Acceptance
Run 2 Acceptance
Q % Recovery Limits Q
% Recovery Limits
uecacnlorODlpnenyi
Tetrachloro-m-xylene
81 58-122 73 58-122
96 49-124 98 49-124
ICP-MS
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 2002 200.8 1 10/17/2009 0043 KJC 10/16/2009 1 �100 1 9736
CAS Analytical
Parameter Number Method Result Q PQL
Lead 7439-92-1 200.8 2.1 1.0
Units Run
ug/L 1
ug/L 1
ug/L 1
ug/L 1
ug/L 1
ug/L 1
ug/L 1
ug/L 1
ug/L 1
ug/L 1
ug/L 1
ug/L 1
ug/L 1
ug/L 1
ug/L 1
ug/L 1
ug/L 1
ug/L 2
ug/L 2
ug/L 2
ug/L 2
ug/L 2
ug/L 2
ug/L 2
Units Run
ug/L 1
PQL = Practical quantitation limit B = Detected in the method blank E = Quanlitation of compound exceeded the calibration range
NO = Not detected at or above the PQL J = Estimated result < PQL and > MDL P = The RPD between Iwo GC columns exceeds 40%
Where applicable, all soil sample analysis are reported on a dry weight basis unless flagged with a "W" N = Recovery is out of criteria H _
- Out of holding lime
Shealy Environmental Services, Inc.
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.shealylab.com Page: Level 1 Report
of 12
eport v2.t

ChapelMerritt's Gravel,
CAT Equipment •4 Excavation
AfferatiflY temwelfffeed25 to 38 defffees
loefesseifItiPficafitaiihfe4rffivxeiitlife
CUSTOMER PROFILE
Merritt's Gravel, Inc. is a quarry
and landfill for construction waste.
The owner, Tony Merritt, uses
heavy equipment to dig and load
Chapel Hill Gravel (a weathered
granite rock that is found only in
this area). The stone crushes
easily and is used in a variety of
applications, such as foundation on
buildings, roads, driveways and
golf courses. It makes an excellent
foundation material and is very
permeable by water. Merritt's
Gravel has been in business for
42 years, and has been an LE
customer for over 40 years. Tony uses LE
Lubricants throughout his operation and in
his personal vehicles. Tony's dad started
using LE Lubricants shortly after they
opened. He was losing bearings on one of
his machines and the local LE lubrication
consultant at that time recommended an
LE grease. The new grease solved the
problem, and Merritt's Gravel has been an
LE customer ever since.
APPLICATION
Tony operates several pieces of equipment
in his operation including several pieces of
CAT equipment: 1975 CAT 980 loader,
1954 CAT D-7 bulldozer, 2006 CAT D5G
bulldozer and the subject of this report — a
2005 CAT 345 excavator.
AREA OF INTEREST
The CAT 345 excavator came
with the CAT factory fill
hydraulic oil. OEM
recommendations called for it to be
replaced at 5,000 hours. During the time
this oil was used, the oil temperature rose
to near the red zone on the dial whenever
the unit was run hard.
LE SOLUTION
When the time came to change the
hydraulic oil, LE Lubrication Consultant Jeff
Boyles, recommended LE 7510 Power
Transmission Fluid (SAE 10). This heavy
duty, high-performance power transmission
fluid is formulated to meet the CAT TO-4
specifications for this machine. It has
excellent friction -reduction, gear protection
and oxidation -resistance properties.
CUSTOMER COST SAVINGS
Exact cost savings are not yet available but
an immediate reduction in operating
temperature was achieved. After changing
to LE 7510, the oil temperature gauge went
down two to three bars and has not at any
time risen to anywhere near the red zone

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joefoid aqj woal 4 006 Alejewlxoadde puoAaq pajuawnoop Aluo seen pue AeIN Aq pajeeilej
peq uo!JeJa68n ang `l!ady ui sl!wg joefoid eqj jo Ij 5Z uigl!nn paluawnoop seen u01jeja6an all
al!uM 'I!s!n aI!s 60OZ AeW aqj jo owll eqj Aq joeq pa!p peq paannpuod pauaoq eqi -sl!w!l

on the dial. After several hours of hard
operation, the temperature barely gets above
halfway on the dial. Lower operating
temperatures will increase the life of the
hydraulic oil plus, lower temps indicates less
friction in the system which will increase
equipment life (see picture - center dial). Tony
estimated the operating temperature was
reduced at least 25 to 30 degrees.
OTHER PRODUCTS USED
• 1605-1606 Duolee Vari-Purpose Gear
Lubricant in gear oil applications
• 2001 Monolec® Wire Rope Lubricant on all
cables and wire ropes
• 2059 Monolex® Penetrating Oil & Lubricant
• 2300 L-X® Heavy Duty Chemical Supplement
as a fuel conditioner in gas motors
• 2410-2420 BTU+ Diesel Fuel Improvers in all
diesel fuel
• 3751-3752 Almagarde Vari-Purpose
Lubricant in all grease applications
• 7500 Monolec® Power Fluid
• 7530 Power Transmission Fluid for CAT
applications
• 8430 & 8450 Monolec GFS Engine Oil
• 8800 Monolec Ultra® Engine Oil
• Oil Safe® containers to store and dispense
lubricants
Thank you to Tony Merritt and Qeff Boyles, LE lubrication
consultant (pictured), for the information provided for this report.
Bagel cn a; tub ! user exprie ace., lnd.vd rest (<., .a,-V. Pm,-J used no, infended m su rsede ninlifac.,orers snocifli-,ations, .

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euueW ,fj!unwwoj pwod sjaiueo
8Z Iuawssassy IeIuawuoJinu3
Mol 1Uan paaap!suoo s! Aoeanooe aouaaan000
Iuawala ay} `elep dHN ON uo paseg '996l ul eaae sigh ul paluawnoop Isel seen pue sll!gpues
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aagwnu e pue gmeq `sanop 6uluanow `I!enb `aaneaq `aallo `Iealsnw `aaap `xo; `I!ggea `laaa!nbs
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ulgl!M sleogs pues bUlll!gs pue sa!I!oolan aajeM g6!H 'saanla pue spaao jo sglnow aeau

Technical Assistance Page 1 of 1
Orange County, North Carolina
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Are you looking for advice or consulting on erosion Conti
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Please report any issues with this page to the webmaster.
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For your convenience, please call ahead for an appointment to talk with a Soil Conservationist or to look at our maps
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Contact
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Contact
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(u) All new development shall meet the development requirements on a project -by -project basis except local governments may
submit ordinances and ordinance revisions which use density or built -upon area criteria averaged throughout the local
government's watershed jurisdiction instead of on a project -by -project basis within the watershed. Prior to approval of the
ordinance or amendment, the local government must demonstrate to the Commission that the provisions as averaged meet or
exceed the statewide minimum requirements, and that a mechanism exists to ensure the orderly and planned distribution of
development potential throughout the watershed jurisdiction.
(v) Silviculture activities are subject to the provisions of the Forest Practices Guidelines Related to Water Quality (15A NCAC
1 I.0101 - ,0209). The Division of Forest Resources is the designated management agency responsible for implementing the
provisions of the rules in 15A NCAC 2B .0200 pertaining to silviculture activities.
(w) Local governments shall, as the existing laws allow, develop, implement, and enforce comprehensive nonpoint source and
stormwater discharge control programs to reduce water pollution from activities within water supply watersheds such as J
development, forestry, landfills, mining, on -site sanitary sewage systems which utilize ground adsorption, toxic and hazardous
materials, transportation, and water based recreation.
(x) When the Commission assumes a local water supply protection program as specified under G.S. 143-214.5(e) all local
permits authorizing construction and development activities as regulated by the statewide minimum water supply watershed
protection rules of this Subchapter must be approved by the Commission prior to local government issuance.
(y) In the event that stormwater management systems or facilities may impact existing waters or wetlands of the United States,
the Clean Water Act requires that these systems or facilities be consistent with all federal and state requirements.
(z) A model local water supply watershed management and protection ordinance, as approved by the Commission in
accordance with G.S. 143-214.5, is on file with the Office of Administrative Hearings and may be obtained by writing to:
Water Quality Planning Branch, Division of Environmental Management, Post Office Box 29535, Raleigh, North Carolina
27626-0535.
(aa) The Commission may delegate such matters as variance approval, extension of deadlines for submission of corrected
ordinances and assessment of civil penalties to the Director.
History Note: Authority G.S. 143-214.1; 143-215.3(a)(1);
Eff. February 1, 1976;
Amended Eff. August 1, 1995; August 3, 1992; March 1, 1991; October 1, 1989.
15A NCAC 02B .0105 DETERMINATION OF SAFETY OR SUITABILITY: CLASS A -II WATERS
History Note: Authority G.S. 143-214.1; 143-215.3(a)(1);
Eff. February 1, 1976;
Amended Eff. January 1, 1985; September 9, 1979;
Repealed Eff February 1, 1986.
15A NCAC 02B .0106 CONSIDERATIONS/ASSIGNING CLASSIFICATIONS FOR PRIMARY RECREATION
In assigning the B or SB classification to waters intended for primary recreation, the Commission will take into consideration
the relative proximity of sources of water pollution and will recognize the potential hazards involved in locating swimming
areas close to sources of water pollution and will not assign this classification to waters in which such water pollution could
result in a hazard to public health. Discharges to waters classified as B or SB will meet the reliability requirements specified in
15A NCAC 2H .0124. Discharges to waters where a primacy recreational use is determined by the Director to be attainable
will be required to meet water quality standards and reliability requirements to protect this use concurrently with
reclassification efforts.
History Note: Authority G.S. 143-214.1; 143-215.3(a)(1);
Eff February 1, 1976;
Amended Eff. October 1, 1989; January], 1985; September 9, 1979.
NORTH CAROLINA ADMINISTRATIVE CODE Eff. May], 2007 Paf4e 8

Re: NCG020733 Tony Merritt's Gravel Pit
Subject: Re: NCG020733 Tony Merritt's Gravel Pit
From: Bethany Georgoulias<[e-mail]>
Date: Mon, 11 Aug 2008 13:02:59 -0400
To: [e-mail]
It still has the original issue date of 8/1/1973 and 7/14/2000 permit revision date.
ARR received date of 2/6/08 (not sure what that is - application for renewal?) So,
doesn't look like it.
Jennifer Jones wrote:
thanks!
Orange CO.
Bethany Georgoulias wrote:
Isure - what county is it in?
Jennifer Jones wrote:
Hey BG,
Can you check on this mining permit for me.- if it has its DLR permit?
NCG020733 Tony Merritt's Gravel Pit
Thanks!
Jen
Bethany Georgoulias
Environmental Engineer
NC DENR Division of Water Quality
Stormwater Permitting Unit
tel. [phone]
fax [phone]
11
1 of 1 8/11/2008 1:11 P

0

els
ENGINEERING & ENVIRONMENTAL SCIENCE COMPANY
3008 ANDERSON DRIVE, SUITE 102
RALEIGH, NC 27609
March 19, 2009 [phone]
Mr. Tony Merritt
Tony Merritt's Gravel Pit
3200 Damascus Church Road
Chapel Hill, NC 27516
Re: Tony Merritt's Gravel Pit
Orange County
Cape Fear River Basin
Dear Mr. Merritt:
The following discusses the existing above referenced mine and the stormwater
evaluation.
GENERAL PROJECT DISCUSION
Tony Merritt's Gravel Pit (Permit No. 68-04) is located 1/4 mile west of the intersection
of Smith Level Rd and Damascus Church Rd. (See Figure 1 Attachment A.) The subject
mine is composed of three (3) tracts of land totaling 26 acres. Ms. Lela Lou Merritt owns
two (2) of the tracts (25.51 acres) and the third tract (0.49acres) is owned by Tony
Merritt.
Up to 17.79 acres is proposed for disturbance in the next 10-years. Land disturbance will
include the placement of beneficial fill after each area of the mine is depleted.
At the present time, no outlet for gravity flow is provided for the stormwater at the mine
area. Stormwater accumulates in the excavation and the water level generally reflects the
groundwater table. During heavy rains and during the late fall to early spring months,
pumping is required. Pumping is normally conducted on average 48 hours per month at a
maximum rate of 1000gpm. The primary spillway (Basin No. 1) has a horizontal and
vertical corrugate metal pipe that can pass the 25-year rain event.
As mining progresses to the south, the beneficial fill will be placed along the northern
portion of the mine. The existing Basin No. 1 will need to be enlarged to accommodate
runoff from the beneficial fill embankment slope. The basin at this time will have a
targeted partial collection size of 19 micron.
To aid in sediment removal a Faircloth Skimmer is to be installed to drain the basin. The
2 inch sized skimmer can drain the basin within 1.1 days for the initial basin size and 3.3
days when the basin is enlarged.

Near the end of the mine activity, a new basin (Basin No.2) will need to be added, as
water will no longer be accumulating in the mine. This basin will also have a horizontal
and vertical pipe as the primary spillway and can pass at least the 2-year rain event. A
grass lined earth spillway will be provided for the secondary spillway: The primary and
secondary spillway can pass the 25-year rain event.
For stability of the beneficial fill placement perimeter ditches (Ditch No.l and No.2) will
be provided around the perimeter of the beneficial fill. Silt fence as needed will be
installed at the toe of the beneficial fill embankment where runoff is not collected by the
basins.
EROSION CONTROL AND PUMP DICHARGE
Attachment B contains the erosion control calculations and the targeted particle size
collection during pumping. Basin No. 1 can trap the 30 micron particle initially. Once
the basin size is increased the 19 micron particle size is targeted.
DEWATERING OPERATION AND MANAGEMENT PLAN
The accompanying mine maps provide the safeguards to insure that the dewatering of the
mine does not impact the adjacent unnamed stream. One (1) monitoring well will be
installed between the mine and the stream. Monitoring the water level estimated inside
the mine and at the monitoring well will be conducted to evaluate the drawdown curve of
the water table. Adjustments of the mine dewatering activity will be made depending on
the information collected and further analyses needed.
CLOSURE
We appreciate serving Merritt's Gravel Pit on this project. Please contact us if you have
any further questions.
Sincerely
Patrick S ellin on P. .
President
Attachment A: Figure 1
Attachment B: Calculations
CC: Jennifer Jones-3 copies
Autumn Hoban-2 copies
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Attachment A: Figure 1

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Appendices
ARI*
5 min.
10 min.
15 min.
30 min.
60 min.
120 min.
3 hr.
6 hr.
12 hr.
24 hr.
(years)
2
5.58
4.46
3.74
2.58
1.62
0.94
0.66
0.40
0.24
0.14
10
7.08
5.66
4.78
3.46
2.25
1.33
0.95
0.58
0.34
0.021
25
7.78
6.19
5.24
3.88
2.58
1.54
1.11
0.68
0.41
0.24
100
8.64
6.86
5.78
4.43
3.05
1.85
1.36
0.84
0.51
0.30
ARI*
.; 5 min.
10 min.
15 min.
30 min.
60 min.
120 min.
3 hr.
6 hr.
12 hr.
24 hr.
(years)
2
6.11
4.88
4.09
2.83
1.77
1.04
0.74
0.44
0.26
0.15
10
7.96
6.36
5.36
3.88
2.53
1.54
1.10
0.66
0.39
0.23
25
8.94
7.13
6.02
4.46
2.97
1.83
1.32
0.80
0.47
0.28
100
10.44
8.29
6.99
5.35
3.69
2.29
1.69
1.03
0.62
0.36
ARI*
5 min.
10 min.
15 min.
30 min.
60 min.
120 min.
3 hr.
6 hr.
12 hr.
24 hr.
(years)
2
7.39
5.92
4.96
3.42
2.15
1.28
0.91
0.56
0.33
0.19
10
9.70
7.75
6.54
4.74
3.08
1.94
1.39
0.87
0.51
0.30
25
10.98
8.75
7.40
5.48
3.65
2.38
1.73
1.08
0.64
0.38
100
12.92
10.27
8.65
6.63
4.56
3.18
2.37
1.49
0.89
0.53
ARI*
'5min.
10 min.
15 min.
30 min.
60 min.
120 min.
3 hr.
6 hr.
12 hr.
24 hr.
(years)
2
6.41
5.12
4.29
2.96
1.86
1.10
0.78
0.47
0.27
0.16
10
8.38
6.70
5.65
4.09
2.66
1.64
1.19
0.72
0.42
0.25
25
9.48
7.55
6.38
4.73
3.15
1.99
1.46
0.88
0.52
0.31
100
11.16
8.87
7.47
5.72
3.94
2.58
1.93
1.18
0.70
0.42
ARI*
5 min.
10 min.
15 min.
30 min.
60 min.
120 min.
3 hr.
6 hr.
12 hr.
24 hr.
(years)
2
6.46
5.16
4.32
2.99
1.87
1.08
0.79
0.48
0.29
0.17
10
8.47
6.77
5.71
4.14
2.69
1.62
1.20
0.74
0.44
0.27
25
9.56
7.62
6.44
4.77
3.17
1.96
1.47
0.91
0.54
0.33
100
11.26
8.95
7.54
5.77
3.98
2.54
1.95
1.21
0.73
0.44
ARI*
5 min.
10 min.
15 min.
30 min.
60 min.
120 min.
3 hr.
6 hr.
12 hr.
24 hr.
(years)
2
7.20
5.75
4.82
3.33
2.09
1.29
0.94
0.58
0.34
0.20
10
9.41
7.52
6.35
4.60
2.99
1.93
1.43
0.89
0.53
0.31
25
10.66
8.49
7.18
5.31
3.54
2.33
1.75
1.09
0.65
0.38
100
12.53
9.95
8.39
6.42
4.42
3.03
2.32
1.45
0.88
0.51
Rey-, 0/06 8.03.9

0
Table 8.03b
Value of Runoff Coefficient
(C) for Rational Formula
Land Use
C
Land Use
C
Business:
Lawns:
Downtown areas
0.70-0.9.5
Sandy soil, flat, 2% -
0.05-0.10
Neighborhood areas
0.50-0.70
Sandy soil, ave., _ --
0.10-0.15
Residential:
2-7%
0.15-0.20
Sandy soil, steep,
0.13-0.17
Single-family areas
0.30-0.50
7%
0.18-0.22
Multi units, detached
0.40-0.60
Heavy soil, flat, 2%
0.25-0.35
Multi units, Attached
0.60-0.75
Heavy soil, ave.,
Suburban
0.25-0.40
2-7%
Industrial:
Heavy soil, steep,
-
Light areas
0.50-0.80
7%
0.30-0.600.20-0.50
Heavy areas
0.60-0.90
Agricultural land:
Parks, cemeteries
0.10-0.25
Bare packed soil
0.30-0.60
Smooth
0. -
Playgrounds
0.20-0.35
-
u a e rows
- .25
Railroad yard areas
0.20-0.40
Heavy soil no crop
Heavy soil with
0.15-0.45
Unimproved areas
0.10-0.30
crop
0.05-0.25
Streets:
Sandy soil no crop
0.05-0..25
Asphalt
0.70-0.95
Sandy soil with
Concrete
0.80-0.95
crop
0.10-0.25
Brick
0.70-0.85
Pasture
_
avy Sol
0.15-0-.
Drives and walks
0.75-0.85
dy sQ I
0.05-0.2
o ands
.05-0.25
Roofs
0.75-0.85
NOTE: The designer must use judgement to select the appropriate C
value within the range for the appropriate land use. Generally, larger
areas with permeable soils,
flat slopes, and dense vegetation should
have lowest C values. Smaller areas with slowly permeable soils, steep
slopes, and sparse vegetation
should be assigned highest C
values.
Source: American Society of Civil Engineers
8.03.6 Rev. 6/06

Table 8.03h Roughness
coefficients (Manning's n)
for sheet flow
Equation 8.03g
Appendices
Surface description
n'
Smooth surface (concrete, asphalt, gravel, or bare
soil)
0.01
Fallow (no residue) ................................................
0.05
Cultivated soils:
Residue cover <_ 20%..........................................
0.06
Residue cover > 20%...........................................
0.17
Grass:
Short grass prairies .............................................
0.15
Dense grasses2....................................................
0.
Bermudagrass......................................................
0.41
Range(nutral).........................................................
0.13
Woods: 3
Light underbrush .................................................
0.40
Dense underbrush ...............................................
0.80
1 The n values are a composite of information compiled by Engman (1986).w
2 Includes species such as weeping lvegrass, bluegrass, buffalo
grass, blue grams
grass, and native grass mixtures.
3 When selecting n , consider cover to a height of about 0.1 ft. This
is the only part of
the plant cover that will obstruct sheet flow.
For sheet flow of less than 300 feet, use Manning's kinematic solution
(Overtop and Meadows 1976) to compute Tt:
0.007(nL)0•8
Tt = _ ,,, _
where:
Tt = Travel time (hr)
n = Manning's roughness coefficient (Table 8.03h)
L = flow length (ft)
P2 = 2-year, 24-hour rainfall (in)
s = slope of hydraulic grade line (land slope, ft/ft)
This simplified form of the Manning's kinematic solution is based on the
following: (1) shallow steady uniform flow, (2) constant intensity of rainfall
excess (that part of a rain available for runoff), (3) rainfall duration of 24
hours, and (4) minor effect of infiltration on travel time.
Rev. 6/06 8.03.27

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i
Fall velocity, m/sec
3 4 6 810—' 2. 3 4 6 810-2
Fall velocity, ft/sec See inset
10-' 2 3 4 5 100 /
10° _
102
11
E
E
a.
U
r
32°F (0°C)
41°F (5°CI
50°F (10°C) 10-�
59°F 05°C) l / 0
L)—V
Nt du r
68°F (zo°c) .1
77°F (25°C E
86°F (30°CI
0.02 .^_'
i4, W 10-2'!
qwm
CL
I/I I It lit I I I I I 1 I 110-3
_.._..
10-5 10 4 J 10-3 �v�i�Q�1C1 70-2 10-1 100
.00096 _
1060 o�Jf !� Fall velocity, ft/sec
—— 3 4 6 8 70-5 2 3 4 6 810-4 2 3 4 6 8 10-3 2 3 4 6 8 10-2 2 3 4 6 810-1 2 3
.00029 _--
Fall velocity, m/sec
Fig. 8.12 Particle settling velocity curves. (7)
l

ij
-All 14
|

1£FF l i
YU �r ,- 1 --. Ti , . A, 4 i i
NIL
2

,t
,.1
PT--T-
40 - L
flip
1
--------------
-- __

7
�e n�
I
i
a
dam► `� _..-__._.__—___— ._____-_. __-- ___.._.-...__ ...
's
i

to be reduced using step 2
to adjust the flow rate for the basin's
volume. (It needs a 3.2"
diameter orifice.)
1'/2" skimmer:
1,728
cubic feet in 24 hours
6,912
cubic feet in 4 days
with a 1'/2" head
3,456
cubic feet in 2 days
12,096
cubic feet in 7 days
5,184
cubic feet in 3 days
Oskirwer:
3,283
cubic feet in 24 hours
13,132
cubic feet in 4 days
with " head
6,566
cubic feet in 2 days
22,982
cubic feet in 7 days
9,849
cubic feet in 3 days
2%" skimmer:
6,234
cubic feet in 24 hours
24,936
cubic feet in 4 days
with a 2.5" head
12,468
cubic feet in 2 days
43,638
cubic feet in 7 days
Revised 11-6-07
18,702
cubic feet in 3 days
3" skimmer:
9,774
cubic feet in 24 hours
39,096
cubic feet in 4 days
with a 3" head
19,547
cubic feet in 2 days
68,415
cubic feet in 7 days
29,322
cubic feet in 3 days
4" skimmer:
20,109
cubic feet in 24 hours
80,436
cubic feet in 4 days
with a 4" head
40,218
cubic feet in 2 days
140,763
cubic feet in 7 days
Revised 11-6-07
60,327
cubic feet in 3 days
5" skimmer:
32,832
cubic feet in 24 hours
131,328
cubic feel in 4 days
with a 4" head
65,664
cubic feet in 2 days
229,824
cubic feet in 7 days
98,496
cubic feet in 3 days
6" skimmer:
51,840 cubic feet in 24 hours
207,360
cubic feet in 4 days
with a 5" head
103,680 cubic feet in 2 days
362,880
cubic feet in 7 days
155,520 cubic feet in 3 days
8" skimmer:
97,978 cubic feet in 24 hours
391,912
cubic feet in 4 days
with a 6" head
195,956 cubic feet in 2 days
685,846
cubic feet in 7 days
CUSTOM
293,934 cubic feet in 3 days
MADE BY ORDER
CALL!
Determining the Orifice
Step 2. To determine the orifice required to reduce the flow rate for the basin's volume a-nd the
number of days to drain the basin, simply use the formula volume _ factor (from the chart
below) for the same size skimmer chosen in the first step and the same number of days. This
calculation will give the area of the required orifice. Then calculate the orifice radius using Area
= Tr r2 and solving for r, r = JArea/3.14) .The supplied cutter can be adjusted to this radius to
cut the orifice in the plug. The instructions with the plug and cutter has a ruler divided into tenths
of inches. Again, this step is not always necessary as explained above.
An alternative method is to use the orifice equation with the head for a particular skimmer
shown on the previous page Irk ine the orifice needed to give the required flow for the
volume and draw down time. 0.5 is used in this chart.
Example: A 4" skimmer is the smallest skimmer that will drain 39,000 cubic feet in 3 days but a
4" inlet will drain the basin too fast (in 1.9 days) To determine the orifice required use the factor
of 4,803 from the chart below for a 4" skimmer and a drawdown time of 3 days. 39,000 cubic
November 6, 2007 2

--------------- -- --
v-

i
C = 61.
� 1
i

A y
. 4
1
:
1
0(,► z �� �y .l L►" d� ti Pi' 'P�
3 I
1
1
i
i
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- - -
79
/ / p t, j /,�
4k -p 1 °i: -S fuV' IF'i V i �r%' �S L�'' !'' -F J elt /c
— i
,_
vC�'C .J ��''#_A _ -1�� �i S --- a— J J • i✓ �''' 7' t$ il^- ------------._

Z (slope)
3
Area
3.0007
Slope
0.05
Q (flow)
6.896561
n
0.068
depth
0.37
V
2.298317
Tau
1.1544
P
9.340085
R
0.321271
Width
7
Watershed:
basin 2
A- Vf� ts'^
✓ �'J,
,s
r'
INSERT FLOW RATES HERE
Q2=
Q10=
Q25= 6.9
SLOPE= 0.05
Width= 7

i
1
----- ----- —
116u5 "`�
r
Lee 71-6 f2p
1Id
""V' 1-1
i
Alme
.i
it
;i
si
—--------- -- ----------------
a'

2(
cl_ p—P.dpdlij
`04 Discharge (ft3/sec)
Appendices
4
3
N
CO
Q
i
rr
O
LO
D•S
I -
Curves may not be extrapolated.
Figure 8.06a Design of outlet protection protection from a round pipe flowing full, minimum tailwater condition (Tw < 0.5 diameter).
Rev. 12N3
8.06.3

7 -FZ/ r-
e ee 1, $4 a0l .7-.
Or
�z L-Lip o1r 7, 2,
LO 7— z9r,�'(,o rt4 3
Ooyl
315-- 0,
:2: etflli�� �9 I?
.62, 0 17— 2- W,
0(073 J-'6 0.31
0. t4l
0,17 7,2- o,�i3c 1.3 0 1 -L
q C)

tf
92 rr—PIXF74-
tk ot I 7 frl f 11, Al'o el
0 owl
lCowf(vele.
Ftv .51tre
f4 Z= 3. --rr-t-4
5 e it, �5 V?- o V-
Fo -6t (',I evm.,�
W, 1) — v LC CO -7 ez f�z-
--Z.
alnne/5 WHt- -fepstuca-fj two ce v?
Cbsnel -,eke-
1��� �L-e Y- �,q er
0, -7

Z (slope)
4
Watershed:
Area
1.949376
2-year
Slope
0.015
Q (flow)
7.197628
n
0.02
depth
0.312
3.692273
Tau
0.292032
P
7.572818
R
0.257418
Width
5
INSERT FLOW RATES HERE
Q2=
0.72
Q10=
Q25=
0
SLOPE=
0.015
Width=
5
For 'V' Ditch
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (Ib/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
4
Watershed:
INSERT FLOW RATES HERE
Area
4.410636
2-year
Q2= 0.72
Slope
0.015
Q10=
Q (flow)
7.212051
-�- v��'u �`'''
Q25= 0
n
0.065
SLOPE= 0.015
depth
V
0.597
1.635
rP - �uv'a
S P 0,0,5,3 we }�
Width= 5
For'V' Ditch
Tau
�.s
P
R
9.922988
0.444487
Ye3t! 0 �5`�"��
LEGEND:
Z- Side Slope (H:V) (unitless)
Width
5
5-, GC-i0 5e
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
`� �„
n: Manning's Coefficient (unitless)
.-
TC
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (Ib/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

,-,
Z (slope)
4
Watershed:
INSERT FLOW RATES HERE
Area
3.8664
10-year
Q2= 0
Slope
0.015
Q10= 4.8
Q (flow)
4.799688
Q25= 0
n
0.081
SLOPE= 0.015
depth
0. `'
Li�`
Width= 5
V
241384
For'V' Ditch
Tau
0.50544
P
9A52954
LEGEND:
R
0.409015
Z- Side Slope (H:V) (unitless)
Width
5
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
�c� `J j
��_
V: Velocity (ft/s)
V X
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
V 0 VVL
o4l &,9'/
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
,
unit weight of water (lb/ft^3)
62.4

Z (slope)
4 Watershed:
Area
5.956064 25-year
Slope
0.015
Q (flow)
5.299932
n
0.135
depth
V
0.889838
Tau
0.698256
P
11.15167
R
0.534096
Width
5
INSERT FLOW RATES HERE
Q2=
0.72
Q 10=
Q25=
5.3
SLOPE=
0.015
Width=
5
For'V' Ditch
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (Ib/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
Area
Slope
Q (flow)
n
depth
V
Tau
P
R
Width
4
Watershed:
2.342076
zW year
0.092
2
7.1837
0.065
0.363
3.0672
2.08 9
`sue 5
7. 93375�
0.293002
5
Q2=
7.2
Q10=
Q25=
0
SLOPE=
0.092
Width=
5
For'V' Ditch
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
82.4

Z (slope)
4
Watershed:
Area
1.5704
2-year
Slope
0.092
Q (flow)
7.180693
n
0.036
depth
0.26
V
Tau
4.572525
1.492608
P
7.144015
R
0,21982
Width
5
INSERT FLOW RATES HERE
Q2=
7.2
Q10=
Q25=
0
SLOPE=
0.092
Width=
5
For'V' Ditch
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

f D.,11 I ) f p—/ rtcv , 5 -' fl, 0 q7—, Gv ve c.—
Z (slope)
4 Watershed:
INSERT FLOW RATES HERE
Area
1.926924 10-year
Q2=
Slope
0.092
Q10= 4.8
Q (flow)
4.800728
Q25=
n
0.073
SLOPE= 0.092
depth
0.309
Width= 5
V
rZ. 4-9 1-10
For'V' Ditch
Tau
3907
P
7,548079
LEGEND:
R
0.255287
Z- Side Slope (H:V) (unitless)
Width
5
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
�(
Q: Flow (cfs)
L9 �v �v �, �Gf ✓e- 6119k n: Manning's Coefficient (unitless)
D 7 3
depth: flow depth (ft)
V: Velocity (ft/s)
v
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

f 7'
Z (slope)
4 Watershed:
Area
2.730684 25-year
Slope
0.092
Q (flow)
5.308758
n
0.
depth
4
V
1.944113
Tau
2.359469
P
8.389193
R
0.3255
Width
5
3 Fr� Ir, -
INSERT FLOW RATES HERE
Q2=
Q10=
Q25= 5.3
SLOPE= 0.092
Width= 5
For 'V' Ditch
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
Area
Slope
Q (flow)
n
depth
V
Tau
P
R
Width
4
Watershed:
1.286844
2-year
0.17
7.234246
0.036
0.219
5.621696 _
2.323152
6.80592
� h 2
0.189077
5
INSERT FLOW RATES HERE
Q2=
7.2
Q10=
Q25=
SLOPE=
0.17
Width=
5
For 'V' Ditch
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
4
Watershed: INSERT FLOW RATES HERE
Area
2.623616
2-year Q2= 7.2
Slope
0.17
Q10=
Q (flow)
7.202022
Q25=
n
0.104
SLOPE = 0.17
depth
0.398
Width= 5
V
2.745075
For'V' Ditch
Tau
4,221984
P
8.281992
LEGEND:
R
0.316786
Z- Side Slope (H:V) (unitless)
Width
5
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

hey
q V, v2wt . I
R(4'� v i1n,
x/A
oil 3 2'.
�- (h �tt�7�� Dd vZ 1 �, �
I-)
on-
7— 7
e) 2-7
6,3
kl-x
e)t 02-
3
0// 14 -
///A
2.4f
12�(
? - -r " �o �lt
oo3� q, q /,21
6,33
0, 0 q3r
OdL�
/.7
3
IvI4
MA
0,W

ffy 02-
4 he
± aw"Y e,5, 7" dlye 4-e3 41-41
ji f ed lo 4 e g /i e- ,iv- &-o'e., Fp v'
4�� 3 �-k�
Id
St"Wr 1,5 7 2
ev,
AD
eVI I
hoo
ti 7keo 7- �l
/q Ell
Ka,
ft
fl he 76fl
-f,, t,- ee 66 1 le I

Z (slope)
4
Watershed
Area
3.634736
2-year
Slope
0.02
Q (flow)
16.67035
n
0.02
depth
V
t-�q
Tau
0.401856
P
12.65528
R
0.287211
Width
10
INSERT FLOW RATES HERE
Q2=
16.7
Q10=
Q25=
SLOPE=
0.02
Width=
10
For'V' Ditch
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
4
Watershed:
Area
7.947824
2-year
Slope
0.02
Q (flow)
16.7021
n
0.065
depth
0.634
V
Tau
2.101468
g.j
/ 2
/ < <`
P
15.2281
R
0.521918
o k ,
Width
10
INSERT FLOW RATES HERE
Q2=
16.7
Q10=
Q25=
SLOPE—
0.02
Width=
10
For'V' Ditch
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (Ib/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
Area
Slope
Q (flow)
n
depth
V
Tau
P
R
Width
4
4.587264
0.02
5.291341
0.09
1.153485 f�e 1
0.4 4208
13.2655
0.345804
10
We- � �
Watershed: INSERT FLOW RATES HERE
10 Q2=
Q 10=
5.3
Q25=
SLOPE=
0.02
Width=
10
For'V' Ditch
f�v 0 -- vP5 e�`-f ram'
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
4 Watershed:
INSERT FLOW RATES HERE
Area
7.233584 25-year
Q2=
Slope
0.02
Q10=
Q (flow)
6.295939
Q25= 6.3
n
0.15
SLOPE= 0.02
depth
0.586
Width= 10
V
0.870376
For'V' Ditch
Tau
0.731328
P
14.83228
LEGEND:
R
0.487692
Z- Side Slope (H:V) (unitless)
Width
10
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
V If
f
V ✓foas' f � � f
ret°� ,
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
4
Watershed
Area
3.310464
2-year
Slope
0.027
Q (flow)
16.76559
n
0.02
depth
0.29
V
;06 4421
Tau
8701
P
12.44088
R
0.266096
Width
10
INSERT FLOW RATES HERE
Q2=
16.7
Q10=
Q25=
SLOPE-
0.027
Width=
10
For'V' Ditch
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (Ib/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
4
Watershed:
Area
7.189556
2-year
Slope
0.027
Q (flow)
16.72898
n
0.065
depth
0.583
V
Tau
2.3
.982238 TLC
` I
6 �� l � Ff
P
54
R
0.485533
Width
10
Q2=
16.7
Q10=
Q25=
SLOPE=
0.027
Width=
10
For'V' Ditch
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft"3)
62.4

Z (slope)
4 Watershed:
Area
4.079796 10-year
Slope
0.027
Q (flow)
5.317442
n
0.087
depth
0.3
V
30 36 �1�
Tau
0. 4
P
12,9439
R
0.315191
Width f (� 10 , q
Fri) vn �3.
INSERT FLOW RATES HERE
Q2=
Q10=
5.3
Q25=
SLOPE=
0.027
Width=
10
For'V' Ditch
4:1e3wil1S
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

0 r ` r-� 2, - 55` r re( L-- 1 6- 5. 6 ,r 5' a2- -7
Z (slope)
Area
Slope
Q (flow)
n
depth
V
Tau
P
R
Width
4
6.253296
0.027
6,308718
1.008863
0.872726
14.27154
0.438166
10
Lf
F
Watershed: INSERT FLOW RATES HERE
25-year Q2=
Q10=
Q25=
6.3
SLOPE=
0.027
Width=
10
For'V' Ditch
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (Ib/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft"3)
62.4

I /D, �(, � �2 j 2 -Y(,4-, 1 ho -e f� -z--a, a5-�?
Z (slope)
4
Watershed:
INSERT FLOW RATES HERE
Area
2.5709
2-year
Q2= 16.6
Slope
0.059
Q10=
Q (flow)
16.715
Q25=
n
0.02
SLOPE= 0.059
depth
V
0.23
.501614
�� ���
Width= 10
For'V' Ditch
Tau
6
P
11.93786
LEGEND:
R
0.215357
Z- Side Slope (H:V) (unitless)
Width
10
Area- (sq. ft)
Slopo: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
Area
Slope
Q (flow)
n
depth
V
Tau
P
R
Width
4
Watershed:
5.528624
2-year
0.059
16.69473
0.065
0.466
3.019689
1.715626
7-
0.399388
10
INSERT FLOW RATES HERE
Q2=
16.6
Q10=
Q25=
SLOPE=
0.059
Width=
10
For'V' Ditch
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
Area
Slope
Q (flow)
n
depth
V
Tau
P
R
Width
4
Watershed:
3.748244
2-year
0.059
16.67818
0.036
0.331
4.449597
T
1.21861
12.7295
0.294453
10
INSERT FLOW RATES HERE
Q2=
16.6
Q10=
Q25=
SLOPE=
0.059
Width=
10
For'V' Ditch
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
4 Watershed:
INSERT FLOW RATES HERE
Area
3.1136 10-year
Q2=
Slope
0.059
Q10= 5.3
Q (flow)
5.302542
Q25=
n
0.085
SLOPE= 0.059
depth
0
Width= 10
V
1.7 302
For'V' Ditch
Tau
848
P
12.30894
LEGEND:
R
0.252954
Z- Side Slope (H:V) (unitless)
Width
10
Area- (sq. ft)
-__—
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
= Q
n: Manning's Coefficient (unitless)
�/
•"�
depth: flow depth (ft)
V: Velocity (ft/s)
e�
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

�yF A `i
4�" ld
Z (slope)
Area
Slope
Q (flow)
n
depth
V
Tau
P
R
Width
4
4.825584
0.059
6.310007
0.14
. 14
1.307615
1.524182
13.41393
0.359744
10
Watershed: INSERT FLOW RATES HERE
25-year Q2=
Q10=
Q25=
6.3
SLOPE=
0.059
Width=
10
For'V' Ditch
ok-
LEGEND:
Z- Side Slope (H:V) (unitless)
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

Z (slope)
4
Watershed:
INSERT FLOW RATES HERE
Area
2.918784
2-year
Q2= 16.7
Slope
0.128
Q10=
Q (flow)
16.67753
Q25=
n
0.036
SLOPE= 0.128
depth
0.264
Width= 10
V
5.713861
ar
For'V' Ditch
Tau
2.108621
P
12.177
o/ ,5 t7
LEGEND:
R
0.239696
Z- Side Slope (H:V) (unitless)
Width
10
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft"3)
62.4

Z (slope)
4
Watershed: INSERT FLOW RATES HERE
Area
5.832576
2-year Q2= 16.7
Slope
0.128
Q10=
Q (flow)
16.65741
Q25=
n
0.104
SLOPE= 0.128
depth
0.488
Width= 10
V
2.855926
For'V' Ditch
Tau
3.897754
P
14.02415
LEGEND:
R
0.415895
Z- Side Slope (H:V) (unitless)
Width
10
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
,-
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

s
Z (slope)
4
Watershed: INSERT FLOW RATES HERE
Area
4.852224
2-year Q2= 16.7
Slope
0.128
Q10=
Q (flow)
16.72703
Q25=
n
0.104
SLOPE= 0.225
depth
0.416
Width= 10
V
3.447292
For'V' Ditch
Tau
3.322675
P
13.43042
LEGEND:
R
0.361286
Z- Side Slope (H:V) (unitless)
Width
10
Area- (sq. ft)
Slope: Channel Slope (ft/ft)
Q: Flow (cfs)
n: Manning's Coefficient (unitless)
depth: flow depth (ft)
V: Velocity (ft/s)
Tau: Shear Stress (lb/ sq. ft.)
P: Wetted Perimeter (ft)
R: Hydraulic Radius (ft)
Width: Bottom Width (ft)
unit weight of water (lb/ft^3)
62.4

El
Design Procedure- The following is a step-by-step procedure for designing a runoff conveyance
Permissible Velocity channel using Manning's equation and the continuity equation:
Table 8.05b
Manning's n for Structural
Channel Linings
Step 1. Determine the required flow capacity, Q, by estimating peak runoff rate
for the design storm (Appendix 8.03).
Step 2. Determine the slope and select channel geometry and lining.
Step 3. Determine the permissible velocity for the lining selected, or the desired
velocity, if paved. (see Table 8.05a, pg. 8.05.4)
Step 4. Make an initial estimate of channel size —divide the required Q by the
permissible velocity to reach a "first try" estimate of channel flow area. Then
select a geometry, depth and top width to fit site conditions.
Step 5. Calculate the hydraulic radius, R, from channel geometry (Figure 8.05b,
pg. 8.05.5).
Step 6. Determine roughness coefficient n.
Structural Linings —see Table 8.05b, pg. 8.05.6.
Grass Lining:
a. Determine retardance class for vegetation from Table 8.05c, pg. 8.05.8.
To meet stability requirement, use retardance for newly mowed condition
(generally C or D). To determine channel capacity, use at least one
retardance class higher.
b. Detenmine n from Figure 8.05c, pg. 8.05.7.
Step 7. Calculate the actual channel velocity, V, using Manning's equation
(Figure 8.05a, pg. 8.05.3), and calculate channel capacity, Q, using the continu-
ity equation.
Step 8. Check results against permissible velocity and required design capacity
to determine if design is acceptable.
Step 9. If design is not acceptable, alter channel dimensions as amopriate. For
trapezoidal channels, this adjustment is usually made by changing the bottom
width.
Channel Lining Recommended
n values
Asphaltic concrete, machine placed
0.014
Asphalt, exposed prefabricated
0,015
Concrete
0.015
Metal, corrugated
0.024
Plastic
0.013
Shhotcrete
0.017
G U
0.030
Earth
0.020
Source: American Society of Civil Engineers (modified)
8.05.6
Rev. 12/93

WON
Table 8.05f Manning's Roughness Coefficient
Lining Category
Lining Type
n - value
n value for Depth Ranges
0-0.5 ft 0.5-2.0 ft
(0-15 cm) (15-60 cm)
2.0 ft
(> 60 cm)
Rigid
Concrete
0.015
0.013
0.013
Grouted Riprap
0.040
0.030
0.028
Stone Masonry
0.042
0.032
0.030
Soil Cement
0.025
0.022
0.020
Asphalt
0.018
0.016
0.016
Unlined
Bare Soil
0.023
0.020
0.020
Rock Cut
0.045
0.035
0.025
Gravel Riprap
1-inch (2.5-cm) D5o
0.044
0.033
0.030
2-inch (5-cm) D50
0.066
0.041
0.034
Rock Riprap
6-inch (15-cm) D50
0.104
0.069
0.035
12-inch (30-cm) D5o
-
0.078
0.040
Note: Values listed are representative values for the respective depth ranges. Manning's roughness coefficients, n, vary with the flow depth.
DETERMINING SHEAR STRESS
Shear stress, T, at normal depth is computed for the lining by the following
equation:
T=yds
Td = Permissible shear stress
where:
T = shear stress in lb/ft2
y = unit weight of water, 62.4 lb/ft3
d flow depth in ft
s = channel gradient in ft/ft.
If the permissible shear stress, Td, given in Table 8.05g is greater than the
computed shear stress, the rprap or temporary lining is considered acceptable.
If a lining is unacceptable, select a lining with a higher permissible shear stress
and repeat the calculations for normal depth and shear stress. In some cases it
may be necessary to alter channel dimensions to reduce the shear stress.
Computing tractive force around a channel bend requires special considerations
because the change in flow direction imposes higher shear stress on the channel
bottom and banks. The maximum shear stress in a bend, Tb, is given by the
following equation:
Tb = KbT
where:

0
(continued)
Sample Problem 8.05a
Design of a
grass -lined channel.
Tractive Force
Procedure
Table 8.05e
Manning's Roughness
Coefficients for Temporary
Lining Materials
8.05.10
Channel summary:
Trapezoidal shape, Z=3, b=3 ft, d=1,5 ft, grade = 2%
Note: In Sample Problem 8.05a the "n-value" is first choosen based
on a permissible velocity and not a design velocity criteria. Therefore
the use of table 8.05c may not be as accurate as individual retardance
class charts when a design velocity is the determining factor.
The design of riprap-lined channels and temporary channel linings is based on
analysis of tractive force.
NOTE: This procedure is for uniform flow in channels and is not to be used
for design of deenergizing devices and may not be valid for larger channels
To calculate the required size of an open channel, assume the design flow is
uniform and does not vary with time. Since actual flow conditions change
through the length of a channel, subdivide the channel into design reaches as
appropriate.
PERMISSIBLE SHEAR STRESS
The permissible shear stress, Td, is the force required to initiate movement of
the lining material. Permissible shear stress for the liner is not related to the
erodibility of the underlying soil. However, if the lining is eroded or broken, the
bed material will be exposed to the erosive force of the flow.
COMPUTING NORMAL DEPTH
The first step in selecting an appropriate lining is to compute the design
flow depth (the normal depth) and determine the shear stress.
Normal depths can be calculated by Manning's equation as shown for trapezoi-
dal channels in Figure 8.05d. Values of the Manning's roughness coefficient for
different ranges of depth are provided in Table 8.05e for temporary linings and
Table 8.05f for riprap. The coefficient of roughness generally decreases with
increasing flow depth.
n value for Depth Ranges*
0-0.5 ft
0.5-2.0 ft
>2.0 ft
Lining Type
Woven Paper Net
0.016
0.015
0.015
Jute Net
0.028
0.022
0.019
Fiberglass Roving
0.021
0.019
Straw with Net
5
j!002
0.0 3
0.025
Curled Wood Mat
II6 6
0.035
0.028
Synthetic Mat
.0 6
0.025
0.021
* Adapted from: FHWA-HEC 15, Pg. 37 - April 1988
Rev. 12/93

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Table 8.05a
J Maximum Allowable Design Velocities
j for Vegetated Channels
Typical Soil
Channel Slope Characteristics2
Grass Lining.
Permissible Velocity
for Established Grass
Application
Lining (ft/sec)
0-5% Easily Erodible
Bermudagrass ,
5.0
Non -plastic
,'Tall fescue~..
-Bath
(Sands & Silts)
grass
µ4;5 `
Kentucky bluegras's
4.5
Grass -legume mixture
3.5
Erosion Resistant
Bermudagrass
6.0
Plastic
Tall fescue
5.5
(Clay mixes)
Bahiagrass
5.5
Kentucky bluegrass
5.5
Grass -legume mixture
4.5
5-10% Easily Erodible
Bermudagrass
4.5
Non -plastic
Tall fescue
4.0
(Sands & Silts)
Bahiagrass
4.0
Kentucky bluegrass
4.0
Grass -legume mixture
3.0
Erosion Resistant
Bermudagrass
5.5
Plastic
Tall fescue
5.0
(Clay Mixes)
Bahiagrass
5.0
Kentucky bluegrass
5.0
Grass -legume mixture
3.5
>10% Easily Erodible
Bermudagrass
3.5
Non -plastic
Tali fescue
2.5
(Sands & Silts)
Bahiagrass
2.5
Kentucky bluegrass
2.5
Erosion Resistant
Bermudagrass
4.5
Plastic
Tall fescue
3.5
(Clay Mixes)
Bahiagrass
3.5
Kentucky bluegrass
3.5
Source: USDA-SCS Modified
NOTE: 'Permissible Velocity based on 10-yr storm peak runoff
2Soil erodibility based on resistance to soil movement from concentrated flowing water.
3Before
grass is established, permissible velocity is determined by the type of temporary liner used.
Selecting Channel To calculate the required size of an open channel, assume the design flow is
uniform and does not vary with time. Since actual flow conditions change
Cross -Section throughout the length of a channel, subdivide the channel into design reaches,
Geometry and design each reach to carry the appropriate capacity.
The three most commonly used channel cross -sections are "W-shaped, par-
abolic, and trapezoidal. Figure 8.05b gives mathematical formulas for the area,
hydraulic radius and top width of each of these shapes.
8.05.4

Riprap Mean Diameter, (ft) = d5oc
so 0.50 1.00 1.50
t
C
Appendices
5 -
L.bU
Channel Slope„ i
S (ft/ft)
i
o
� O
i
O O•
N ry�
*O
i
I
1
50
45
40
35
ti
3 0 Sly
CQ
_CD
15
0 W
CD
n
5
---- -•-- �•�� v.ro i.uo 1.26
Figure 8.05k Steep slope riprap design, B = 4, Z = 3. Depth, d(ft) = do (flow depth)
Riprap Kean Dia =" d50c—"""� 7 ��
0 d, .50 1.00 1.50 2.00
50
45
40
35
_ 30
Q
25
Z77
W
U 20
07
a
� i1�
5
0
Figure 8.051 Steep slope riprap design, B = 6, Z = 3.
o
r ry
0 0
40
0
0
ry w C
0 0 o
Channel
S (ft/ft)
Slope, S
L-LOOIF1
60
45
40
36
n
30
cc
CD
26 p
20 Cn
10
6
0
0 .26 .60 .75 1.00 1.26
Depth, d(ft) = do (flow depth)
Rev. I Z193
8.05.23

Table 6.15b
Sizes for Riprap and Erosion
Control Stone Specified by
the N.C. Department of
Transportation
Practice Standards and Specifications
Riprap
Erosion Control
Class
1
Class
Class
ass
2
A
B
5 to 200 lb
25 to 250 lb
2" tc,_6"
5" to 15"
30% shall
60% shall
weigh a
weigh a mini -
minimum of 60
irnum of 100 lb
Ibs each
each
No more than
No more than
10% tolerance
10% shall
5% shall weigh
top and bot-
weigh less
less than 50 lb
tom sizes
than 15 lb
each.
each
Equally dis-
Equally dis-
tributed, no
tributed, no
gradation
gradation
specified
specified
source: North Carolina Aggregates Association.
on exposure to water or weathering, and suitable in all other respects for the pur-
pose intended. The specific gravity of the individual stones should be at least
2.5.
Size of stone —The sizes of stones used for riprap protection are determined by
purpose and specific site conditions.
• Slope stabilization—Riprap stone for slope stabilization not subject to
flowing water or wave action should be sized for stability for the proposed
grade. The gradient of the slope to be stabilized should be less than the
natural angle of repose of the stone selected.. Angle of repose of riprap
stones may be estimated from Figure 6.15a.
Riprap used for surface stabilization of slopes does not a4d significant
resistance to sliding or slope failure and should not be considled a retain-
ing wall. The inherent stability of the soil must be satisfactory before
riprap is used for surface stabilization. Slopes approaching 1.5:1 may re-
quire special stability analysis.
• Outlet protection —Design criteria for sizing stone and determining the
dimensions of riprap pads at channel or conduit outlets are presented in
Practice 6.41, Outlet Stabilization Structure.
• Channel stabilization and streambank protection —Design criteria for
sizing stone for stability of channels are contained in Appendix 8.05.
Filter blanket —A filter blanket is a layer of material placed between the riprap
and the underlying soil to prevent soil movement into or through the riprap.
6.15.3