19990198 Ver 1_COMPLETE FILE_19990304

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
Kerr T. Stevens, Director
1 ? •
NC ENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
March 16, 1999
Davidson County
WQC 401 Project # 990198
APPROVAL of 401 Water Quality Certification
Davidson County Integrated Solid Waste
220 Davidson County Landfill Road
Lexington, NC 27292
Dear Sirs:
You have our approval, in accordance with the attached conditions, for the purpose of a temporary road crossing, as
you described in your application dated March 4, 1999. After reviewing your application, we have decided that this fill is
covered by General Water Quality Certification Number 3103. This Certification allows you to use Nationwide Permit
Number 14 when the Corps of Engineers issues it. In addition, you should get any other federal, state or local permits
before you go ahead with your project including (but not limited to) Sediment and Erosion Control, Coastal Stormwater,
Non-Discharge and Water Supply Watershed regulations. Also this approval will expire when the accompanying 404 or
CAMA permit expires unless otherwise specified in the General Certification.
This approval is only valid for the purpose and design that you described in your application. If you change your
project, you must notify us and send us a new application. If the property is sold, the new owner must be given a copy of
this Certification and approval letter and is thereby responsible for complying with all conditions. If total wetland fills for
this project (now or in the future) exceed one acre, compensatory mitigation may be required as described in 15A NCAC
2H .0506 (h). For this approval to be valid, you must follow the conditions listed in the attached certification.
If you do not accept any of the conditions of this certification, you may ask for an adjudicatory hearing. You must
act within 60 days of the date that you receive this letter. To ask for a hearing, send a written petition which conforms to
Chapter 150B of the North Carolina General Statutes to the Office of Administrative Hearings, P.O. Box 27447, Raleigh,
N.C. 276 1 1-7447. This certification and its conditions are final and binding unless you ask for a hearing.
This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water Act. If you
have any questions, please telephone John Domey at 919-733-1786.
Attachment
cc: Wilmington District Corps of Engineers
Corps of Engineers Raleigh Field Office
Winston-Salem DWQ Regional Office
Mr. John Domey
Central Files
Sincerely,
T. Stevens
990198.1tr
Division of Water Quality • Environmental Sciences Branch
Environmental Sciences Branch, 4401 Reedy Creek Rd, Raleigh, NC 27607 Telephone [phone] FA)C #'33 99A
An Equal Opportunity Affirmative Action Employer • 50% recycled/10% post consumer paper
DWQ ID: _ CORPS ACTION ID: _ 4
NATIONWIDE PERMIT REQUESTED (PROVIDE NATIONWIDE PERMIT #) 14 „ wt7L5ND? GRO;
3„T?R U4LlTY eSCT
JtPRE-CONSTRUCTION NOTIFICATION APPLICATION
FOR NATIONWIDE PERMITS THAT REQUIRE:
1. NOTIFICATION TO THE CORPS OF ENGINEERS
2. APPLICATION FOR SECTION 401 CERTIFICATION
3. COORDINATION WITH THE NC DIVISION OF COASTAL MANAGEMENT
SEND THE ORIGINAL AND (1) COPY OF THIS COMPLETED FORM TO THE APPROPRIATE FIELD
OFFICE OF THE CORPS OF ENGINEERS (SEE AGENCY ADDRESSES SHEET). SEVEN (7)
COPIES MUST BE SENT TO THE NC DIVISION OF WATER QUALITY.
ATTN: JOHN DORNEY. 4401 REEDY CREEK ROAD, RALEIGH, NC
27607. PLEASE PRINT OR TYPE
1. OWNER'S NAME: DAVIDSON COUNTY INTEGRATED SOLID WASTE
2. MAILING ADDRESS: 220 DAVIDSON COUNTY LANDFILL ROAD
SUBDIVISION NAME
CITY: LEXINGTON STATE: NC ZIP CODE: 27292
PROJECT LOCATION ADDRESS, INCLUDING SUBDIVISION NAME (IF DIFFERENT FROM
MAILING ADDRESS ABOVE):
3. TELEPHONE NUMBER: (HOME) (WORK) [phone]
4. IF APPLICABLE: AGENT'S NAME OR RESPONSIBLE CORPORATE OFFICIAL, ADDRESS,
PHONE NUMBER:
G. N. RICHARDSON AND ASSOCIATES. INC
425 NORTH BOYLAN AVENUE
RALEIGH. NORTH CAROLINA 27603
[phone]
5. LOCATION OF WORK (PROVIDE A MAP, PREFERABLY A COPY OF USGS TOPOGRAPHIC MAP
OR AERIAL PHOTOGRAPHY WITH SCALE):
COUNTY: DAVIDSON -NEAREST TOWN: LEXINGTON
SPECIFIC LOCATION (INCLUDE ROAD NUMBERS, LANDMARKS, ECT.) NORTH OF ROY LOPP
ROAD AND EAST OF TURNER ROAD, NORTH OF HWY 64 & I-85 INTERCHANGE AS SHOWN IN
FIGURE 1.
6. IMPACTED OR NEAREST STREAM/RIVER: JIMMY'S CREEK RIVER BASIN: YADKIN
7. (a) IS PROJECT LOCATED NEAR WATER CLASSIFIED AS TROUT, TIDAL SALTWATER, (SA),
HIGH QUALITY WATERS (HQW), OUTSTANDING RESOURCE WATERS (ORW), WATER
SUPPLY (WS-I OR WS-II)? YES [-] NO ® IF YES, EXPLAIN: _
(b) IS THE PROJECT LOCATED WITHIN A NORTH CAROLINA DIVISION OF COASTAL
MANAGEMENT AREA OF ENVIRONMENTAL CONCERN (AEC)? YES 0 NO
(c) IF THE PROJECT IS LOCATED WITHIN A COASTAL COUNTY (SEE PAGE 7 FOR LIST OF
COASTAL COUNTIES), WHAT IS THE LAND USE PLAN (LUP) DESIGNATION? NOT
APPLICABLE
8. (a) HAVE ANY SECTION 404 PERMITS BEEN PREVIOUSLY REQUESTED FOR USE ON THIS
PROJECT? YES ® NO F? IF YES, PROVIDE ACTION I.D. NUMBER OF PREVIOUS PERMIT AND
ANY ADDITIONAL INFORMATION (INCLUDE PHOTOCOPY OF 401 CERTIFICATION): NWP 6
ACTION ID 199201317 AUGUST 3 .1992 - 404 PERMIT AND 401 CERTIFICATION ATTACHED
(b) ARE ADDITIONAL PERMIT REQUESTS EXPECTED FOR THIS PROPERTY IN THE FUTURE?
YES 0 NO ® IF YES, DESCRIBE ANTICIPATED WORK: NO ADDITIONAL PERMITS ARE
ANTICIPATED
9. (a) ESTIMATED TOTAL NUMBERS OF ACRES IN TRACT OF LAND: 270
(b) ESTIMATED TOTAL NUMBER OF ACRES OF WETLANDS LOCATED ON PROJECT SITE: 5
10. (a) NUMBER OF ACRES OF WETLANDS IMPACTED BY THE PROPOSED PROJECT BY:
FILLING: _ EXCAVATION: _
FLOODING: _ OTHER :
DRAINAGE : TOTAL ACRES TO BE IMPACTED: _
(b) (1) STREAM CHANNEL TO BE IMPACTED BY THE PROPOSED PROJECT (IF RELOCATED,
PROVIDE DISTANCE BOTH BEFORE AND AFTER RELOCATION:
LENGTH BEFORE: _ FT AFTER: _ FT
WIDTH BEFORE (based on normal high water contours): 20 FT
AVERAGE DEPTH BEFORE: 4 FT AFTER: 4 FT
(b) (2) STREAM CHANNEL IMPACTS WILL RESULT FROM: (CHECK ALL THAT APPLY)
OPEN CHANNEL RELOCATION: _ PLACEMENT OF PIPE IN CHANNEL: X
CHANNEL EXCAVATION: _ CONSTRUCTION OF A DAM/FLOODING: _
OTHER:
11. IF CONSTRUCTION OF A POND IS PROPOSED, WHAT IS THE SIZE OF THE WATERSHED
DRAINING TO THE POND? WHAT IS THE EXPECTED POND SURFACE AREA? _
12. DESCRIPTION OF PROPOSED WORK INCLUDING DISCUSSION OF TYPE OF MECHANICAL
EQUIPMENT TO BE USED? (ATTACH PLANS; 81/2 BY 1 I DRAWINGS ONLY)
TEMPORARY ROAD CROSSING TO BE CONSTRUCTED USING 48 INCH PIPES BACKFILLED.
AND COVERED WITH AGGREGATE MATERIALS. GEOTEXTILE. AND RIPRAP.
13. PURPOSE OF PROPOSED WORK: TEMPORARY ACCESS TO NEW BORROW AREA TO OBTAIN
REQUIRED DAILY COVER FOR LANDFILL UPON TERMINATION OF BORROW ACTIVITIES.
ROAD CROSSING WILL BE REMOVED.
14. STATE REASONS WHY IT IS BELIEVED THAT THIS ACTIVITY MUST BE CARRIED OUT IN
WETLANDS (INCLUDE ANY MEASURES TAKEN TO MINIMIZE WETLAND IMPACTS)
ROAD CROSSING HAS BEEN DESIGNED TO AVOID ALL WETLANDS (FIGURE 2).
15. YOU ARE REQUIRED TO CONTACT THE US FISH AND WILDLIFE SERVICE AND/OR
NATIONAL MARINE FISHERIES SERVICE REGARDING THE PRESENCE OF ANY FEDERALLY
LISTED OR PROPOSED FOR LISTING ENDANGERED OR THREATENED SPECIES OR CRITICAL
HABITAT IN THE PERMIT AREA THAT MAY BE AFFECTED BY THE PROPOSED PROJECT.
DATE CONTACTED: 2/8/88 FOR SOLID WASTE PERMIT 29-06
16. YOU ARE REQUIRED TO CONTACT THE STATE HISTORIC PRESERVATION OFFICER
(SHPO) REGARDING THE PRESENCE OF HISTORIC PROPERTIES IN THE PERMIT AREA
WHICH MAY BE AFFECTED BY THE PROPOSED PROJECT. DATE CONTACTED 2/17/88.
17. DOES THE PROJECT INVOLVE AN EXPENDITURE OF PUBLIC FUNDS OR THE USE OF PUBLIC
(STATE) LAND? YES E] NO ® (IF NO, GO TO 18)
(a) IF YES, DOES THE PROJECT REQUIRE PREPARATION OF AN ENVIRONMENTAL
DOCUMENT PURSUANT TO THE REQUIREMENTS OF THE NORTH CAROLINA
ENVIRONMENTAL POLICY ACT? YES ? NO E]
(b) IF YES, HAS THE DOCUMENT BEEN REVIEWED THROUGH THE NORTH CAROLINA
DEPARTMENT OF ADMINISTRATION STATE CLEARINGHOUSE YES ? NO F-1
IF ANSWER 17b IS YES, THEN SUBMIT APPROPRIATE DOCUMENTATION FROM THE STATE
CLEARINGHOUSE WITH THE NORTH CAROLINA ENVIRONMENTAL POLICY ACT.
QUESTIONS REGARDING THE STATE CLEARINGHOUSE REVIEW PROCESS SHOULD BE
DIRECTED TO MS. CHRYS BAGGETT, DIRECTOR STATE CLEARINGHOUSE, NORTH
CAROLINA DEPARTMENT OF ADMINISTRATION, 116 WEST JONES STREET, RALEIGH,
NORTH CAROLINA 27603-8003, TELEPHONE [phone].
18. THE FOLLOWING ITEMS SHOULD BE INCLUDED WITH THIS APPLICATION IF PROPOSED
ACTIVITY INVOLVES THE DISCHARGE OF EXCAVATED OF FILL MATERIAL INTO
WETLANDS:
(a) WETLAND DELINEATION MAP SHOWING ALL WETLANDS, STREAMS, LAKES, AND
PONDS ON THE PROPERTY (FOR NATIONWIDE PERMIT NUMBERS 14, 18, 21, 26, 29, AND 38).
ALL STREAM (INTERMITTENT AND PERMANENT) ON THE PROPERTY MUST BE SHOWN ON
THE MAP. MAP SCALES SHOULD BE 1 INCH EQUALS 50 FEET OF 1 INCH EQUALS 100 FEET
OF THEIR EQUIVALENT.
(b) IF AVAILABLE, REPRESENTATIVE PHOTOGRAPH OF WETLANDS TO BE IMPACTED BY
PRODUCT.
(c) IF DELINEATION WAS PERFORMED BY A CONSULTANT, INCLUDE ALL DATA SHEETS
RELEVANT TO THE PLACEMENT OF THE DELINEATION LINE.
(d) ATTACH A COPY OF THE STORMWATER MANAGEMENT PLAN IF REQUIRED.
(e) WHAT IS LAND USE OF SURROUNDING PROPERTY? LANDFILL & AGRICULTURE
(o IF APPLICABLE, WHAT IS PROPOSED METHOD OF SEWAGE DISPOSAL? NA
SIGNED AND DATED AGENT AUTHORIZATION LETTER, IF APPLICABLE.
NOTE: WETLANDS OR WATERS OF THE US MAY NOT BE IMPACTED PRIOR TO:
1. ISSUANCE OF A SECTION 404 CORPS OF ENGINEERS PERMIT,
2. EITHER THE ISSUANCE OR WAIVER OF A 401 DIVISION OF WATER QUALITY
CERTIFICATION, AND
3. (IN THE TWENTY COASTAL COUNTIES ONLY), A LETTER FROM THE NORTH
CAROLINA DIVISION OF COASTAL MANAGEMENT STATING THE PROPOSED
ACTIVITY IS CONSISTENT WITH THE NORTH CAROLINA COASTAL MANAGEMENT
PROGRAM,
11uZz2LImal
OWNER'S/AGENT'S SIGNATURE
DATt 41
(AGENT'S SIGNATURE VALID ONLY
IF AUTHORIZATION LETTER FROM
THE OWNER IS PROVIDED).
DEPARTMENT OF THE ARMY
WILMINGTON DISTRICT, CORPS OF ENGINEERS
P.O. 1890
WILMINGTON, NORBHOCAROLINA284ORECEIVED
CAMP DRESSER & McKEE
IN REPLY REFER TO August 3, 1992 . ALEICH
Regulatory Branch
Nationwide Permit No. 26 (PDN) AU G 4 1992
Action ID. 199201317
Davidson County
C/O Mr. L. Norman Shrone
Court House Annex
Post Office Box 1067
Lexington, North Carolina 27292
Dear Mr. Shrone:
Reference is made to my letter of June 17, 1991. This letter confirmed
the May 24, 1991 wetlands survey verification of the proposed Davidson County
Land Fill adjacent to an unnamed tributary of Hamby Creek and Rick Fork Creek,
east of Lexington, Davidson County, North Carolina.
Reference is also made to the conceptual design and permit application
(PDN) for the aforementioned project received from Mr. Mark N. Hargrove of
Camp Dresser & McKee (engineering consultant for project) on July 16, 1992.
This proposed project design showed jurisdictional impacts of approximately
1.6 acres on unnamed/above headwater tributaries of Hamby Creek.
For the purposes of the U.S. Army Corps of Engineers' Regulatory Program,
Title 33, Code of Federal Regulations (CFR), Part 330.6, published in the
Federal Register on November 22, 1991, lists nationwide permits.
Authorization was provided, pursuant to Section 404 of the Clean Water Act,
for discharges of dredged or fill material into headwaters and isolated waters
provided: _
a. the discharge does not cause the loss of more than 10 acres of waters
of the United States;
b. the permittee notifies the District Engineer if the discharge would
cause the loss of waters of the United States greater than one acre in
accordance with the "Notification" general condition. For discharges in
special aquatic sites, including wetlands, the notification must also include
a delineation of affected specific aquatic sites, including wetlands; and
c. the discharge, including all attendant features, both temporary and
permanent, is part of a single and complete project.
? S?J, e
e ?
. w-
.y W ?.
State of North Carolina
Department of Environment, Health, and Natural Resources
Division of Environmental Management
512 Norh Salisbury Street - Raleigh, Notch Carolina 27604
James G. Martin, Governor August 26, 1992 A. Preston Howard, Jr., P.E.
William W. Cobey, Jr., Secretary Acting Director
Mr. Robert McIntyre
Davidson County Landfill
Route 1, Box 678
Lexington, N.C. 27292
Dear Mr. McIntyre:
Post-It° brand tax transmittal memo 7671 s of pages ?
oc_ w AA,-1 fr9rnROG
co. C M co.TAvtdso-i COU.t7f
Dept. V In
f Phone N'B
FasN -
781?s?,3o Fax/ ??q- ?Q???O[l
Subject: Proposed Fill in Wetlands
Davidson County landfill
Davidson County
DEEM Project $92378, COE f 199201317
Upon review of your request for Water Quality certification
to place fill material in 1.6 acres of waters and wetlands for
development of the Dvaidson County landfill located at
SR 2014 in Davidson County, we have determined that the proposed
fill can be covered by General Water Quality Certification No.
2671 issued January 1, 1992. A copy of the General Certification
is attached. This Certification may be used in qualifying for
coverage under Corps of Engineers' Nationwide Permit No. 26.
If you have any questions, please contact John Dorney
at 919/733-1786.
Sincerely,
?. Pr ston Howard, Jr: P E.
APH:JD
Attachment
cc: Wilmington District Corps of Engineers
Corps of Engineers Raleigh Regional Office
Winston- Salem DEM Regional Office
Mr. John Dorney
Central Files
REGIONAL OFFICES
Asheville Fayetteville Mooresville Raleigh Washington Wilmington Winston-Salem
7041251-6206 919/486.1541 7041663-1699 919/571-4700 919/946.6481 919/395.3900 919/896.7007

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n f WETLANDS DELINATION
FOR DAVIDSON COUNTY DAADSON COUNTY LANDFILL
a 4 i - I LANDFILL BORROW AREA CROSSING
G.N. RICHARDSON & ASSOCIA
426 N.BOYLAN AVENUE RALEIGH. N.C. 270 3
--
...
U.S. ARMY CORPS OF ENGINEERS
Wilmington District VE D
Action ID: 199920406 County: Davidson ' . 1999
1
Notification of Jurisdictional Determination
Property Authorized
Owner Davidson County Landfill Agent G.N. Richardson & Assoc.
Address P.O. Box 1067, Lexington, North Carolina Philip May
27293-1067 Address 425 N. Boylan Avenue. Raleigh, NC 27603
Telephone Number 336
Telephone Number 919 828-0577
Size and Location of Property (svaterbody, Highway name/number, town, etc.) Davidson County
Landfill proposed expansion of the existing facility site located off of Roy Loop Road, adjacent to
Hamby Creek, near Lexington, in Davidson County, North Carolina. Related Action ID
199201317.
Indicate Which of the Following apply:
0 There are wetlands on the above described property which we strongly suggest should be delineated and surveyed.
The surveyed wetland lines must be verified by our staff before the Corps will make a final jurisdictional
determination on your property.
0 Because of the size of your property and our present workload, our identification and delineation of your wetlands
cannot be accomplished in a timely manner. You may wish to obtain a consultant to obtain a more timely
delineation of the wetlands. Once the consultant has flagged a wetland line on the property, Corps staff will
review it, and, if it is accurate, we strongly recommend that you have the line surveyed for final approval be the
Corps. The Corps will not make a final jurisdictional determination on your property without an approved survey.
The wetlands on your lot have been delineated, and the limits o the Corps jurisdiction have been explained to
yom Unless there is a change in the law or our published re uladons, this determination may be relied upon
or a period not to exceed five years from the date of this notification.
0 There are no wetlands present on the above described property which are subject to the permit requirements of
section 404 of the Clean Water Act (33 USC 1344). Unless there is a change in the law or our published
regulations, this determination may be relied upon for a period not to exceed five years from the date of this
notification.
0 The project is located in one of the 20 Coastal Counties. You should contact the nearest State Office of Coastal
Management to determine their requirements.
Placement of dredged or fill material in wetlands on this property without a Department of the
Army permit is in most cases a violation of Section 301 of the Clean Water Act (33 USC 1311). A
permit is not required for work on the property restricted entirely to existing high ground. If you
have any questions regarding the Corps of Engineers regulatory program, please contact
John Thomas rat 919- 876 - 8441 extension 25
Project Manager Signature _
Date Feb 5, 1999 piration Date F
SURVEY PLAT OR FIELD SKETCH OF DESCRIBED PROPERTY AND THE WETLAND
DELINEATION FORM MUST BE ATTACHED TO THE YELLOW (FILE) COPY OF THIS FORM.
LEXINGTON EAST QUADRANGLE
00 ?? I _ 3 ll NORTH CAROLINA-DAVIDSON CO.
7.5 MINUTE SERIES (TOPOGRAPHIC)
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NATIONAL GEODETIC VERTICAL DATUM OF 1929 DECLINATION AT CENTER OF SHEET
G.N. RICHARDSON & ASSOCIATES, INC.
Davidson County Landfill
USGS Site Map i-Engineering and Geological
425 N. Boylan Avenue Raleigh, North Carolina
(919)-828-0577 Fax:[phone] www.gnra.com
FADRAWN BY: CHECKED BY: DATE: PROJECT NO. FIGURE N0: FILE NAME
SHOWN A.W.H P.W.M. 2/17/99 DAVDCO-16 1
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425 N. Boylan Avenue Raleigh, North Carolina
19191-828-0577 Fax:[phone] www.gnra.com
SCALE: DRAWN BY: CHECKED BY: DATE: PROJECT NO. FIGURE NO, FILE NAME
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Road Crossing Design Engineering and Geological
425 N. Boylan Avenue Raleigh, North Carolina
(919)-828-0577 Fax:[phone] www.grira.com
SCALE: DRAWN BY: CHECKED 7YDATE: PROJECT NO. FIGURE NO. FILE NAME
D.T.D. P.K.2/17/99 DAVDCO-16 3

SHEET 1 OF 7
PROJECT Davidson County Landfill - West Borrow Area JOB NO. DAVDCO-16
DATE 2/4/99
SUBJECT Culvert Analysis COMPUTED BY DTD
CHECKED BY PK
Objective To analyze culverts for inlet and outlet control. Verify that the allowable headwater depth
is not exceeded.
Reference Debo, T.N., and Reese, A.J., Municipal Storm Water Management, Lewis Publishers,
Boca Raton, FL, 1995, pp.438-442.
Analvsis
- Determine Peak Flow Rate to Drop Inlet:
Use Rational Method (QP = CIA)
- Determine Input Parameters:
- HWni.LOW = Allowable Headwater Depth (ft)
- N = Number of Pipes Used
- QPIPE = Q1 'N (CfS)
- D = Culvert Diameter (in)
- Type of Culvert (i.e., Concrete, CMP, etc.)
- L = Culvert Length (ft)
- s = Culvert Slope (ft/ft)
- n = Manning's Number
- ke = Entrance Loss Coefficient
- dc = Critical Depth (Use Critical Depth Figures) (ft)
- Find actual HW for the culvert for both inlet & outlet control: (The condition with the
greatest HW governs.)
- For Inlet Control:
Enter Inlet Control Nomograph with D & QPIPE and find HW/D for the
proper entrance type.
Compute HW. If HW exceeds HWnLLOW, try larger culvert.
CULVERT.WPD
G.N. RICHARDSON & ASSOCIATES
Engineering and Geological Services
425 N. Boylan Avenue, Raleigh, NC 27603
Telephone: [phone]
SHEET 2 OF 7
PROJECT Davidson County Landfill -West Borrow Area JOB NO. DAVDCO-16
DATE 2/4//99
SUBJECT Culvert Analysis COMPUTED BY DTD
CHECKED BY Pry
- For Outlet Control:
Enter Outlet Control Nomograph with L, Ke, & D.
To compute HW, connect the length scale for the type of entrance condition
and culvert diameter scale with a straight line, pivot on the turning line, and
draw a straight line from the design discharge through the turning point to
the head loss scale H. Compute HW from the following equation:
HW=H+ho - LS
d +D
where: ho = 2 or tailwater depth, whichever is greater.
If HW exceeds HWALLOW, try larger culvert.
G.N. RICHARDSON & ASSOCIATES
Engineering and Geological Services
425 N. Boylan Avenue, Raleigh, NC 27603
Telephone: [phone]
G.N. Richardson & Associates SHEET: -in 3/7
ENGINEERING AND GEOLOGICAL SERVICES JOB #: DAVDCO-16
DATE: 02/01/99
Davidson County Landfill BY: DTD
Stream Channel Crossing CHKD BY: tom'
Obiective:
Using Manning's Equation, determine the average flow of the stream channel as observed and size
the appropriate culvert size(s) to handle the determined flow.
Manning Equation:
Q= 1.486 A R` S`
n
Where: Q= Flow (cfs)
n= Manning roughness coefficient (NC E&S Section 8.04)
A= Cross-sectional area of flow (ft2)
R= Hydraulic radius (ft); A/P; P=wetted perimeter
s= Longitudinal slope of the water surface (ft/ft)
Assumptions:
1. It has been observed for the last two years that the stream channel flows dry for the majority
of the year.
2. A series of beaver dams and other debris cause stormwater to pond upstream of the
road crossing area.
3. Average flow through the channel has been observed to be approximately 6-12 inches in depth
across the width of the channel (20 ft.). To be conservative assume a flow depth of 2 feet.(HA)c)
Flow Cross-section:
W= 20 ft
d= 0.5-1 ft (Typical)
d= 1-2 ft (Peak)
s= 0.5 %
Channel Flow:
Q= ? cfs
n= 0.035 Earth-n = 0.02; Minor Irregularities-n = 0.005; Minor Obstructions-n = 0.010
s= 0.005 ft/ft
Depth ft 0.5 1.0 1.5 2.0
P (ft) = 21 22 23 24
A (ft2) = 10 20 30 40
R (ft) = 0.476 0.909 1.304 1.667
Q (cfs) = 18 56 108 169
G.N. Richardson & Associates SHEET 4/7
ENGINEERING AND GEOLOGICAL SERVICES JOB #: DAVDCO-16
DATE: 2/3199
Davidson County Landfill BY: PKS
Culvert Analysis CHKD BY: qt-D
Peak Flow Rate:
Q (cfs) = 169.0
Culvert Parameters: (User Input)
Allowable HW Depth (ft) _
Number of Pipes, N =
Culvert Diameter, D (in) _
Type of Culvert=
Culvert Length, L (ft) _
Culvert Slope, S (ft/ft) =
Manning's Number, n =
Entrance Loss Coef., ke =
Critical Depth (ft) =
Case 1: Inlet Control
5
2 Qpipe (cfs) = 84.5
48
CMP
40
0.005
0.024
0.5
2.8
HW/D = 1.22 (User Input - From Inlet Control Nomograph)
HW (ft) = 4.9
Case 2: Outlet Control
ho (ft) = 3.4
H (ft) = 1.7 (User Input - From Outlet Control Nomograph)
HW (ft) = 4.9
OUTLET CONTROL GOVERNSI
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DISCHARGE-Q -CFS
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1000
BUREAU OF PUBLIC ROADS
JAN. 1964
2000
DISCHARGE-Q-CFS
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CRITICAL DEPTH
CIRCULAR PIPE
FIGURE 3-6.1M(1)
Exhibit 12
o 617 -
I80 10,000
168 8,000
EXAMPLE
156 6,000 D• 36 Inches (3.0 fast) (2)

144 5,000 0.66 cfs 6.
4,000 (3)
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12
BUREAU OF PUBLIC ROADS JAN. 1963
1.0 " .S I
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HEADWATER DEPTH FOR
C. M. PIPE CULVERTS
WITH INLET CONTROL
VI-12
Exhibit 16
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2000

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600
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120 S10a So -•.
SUBMERGED OUTLET CULVERT FLOwlMG FULL
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VI-16

DWQ ID: - CORPS ACTION ID:
yV?NpS !'i?<<,,:,
NATIONWIDE PERMIT REQUESTED (PROVIDE NATIONWIDE PERMIT #) Z WATER 0
(6AL
PRE-CONSTRUCTION NOTIFICATION APPLICATION
FOR NATIONWIDE PERMITS THAT REQUIRE:
1. NOTIFICATION TO THE CORPS OF ENGINEERS
2. APPLICATION FOR SECTION 401 CERTIFICATION
3. COORDINATION WITH THE NC DIVISION OF COASTAL MANAGEMENT
SEND THE ORIGINAL AND (1) COPY OF THIS COMPLETED FORM TO THE APPROPRIATE FIELD
OFFICE OF THE CORPS OF ENGINEERS (SEE AGENCY ADDRESSES SHEET). SEVEN (Z)
COPIES MUST BE SENT TO THE NC DIVISION OF WATER QUALITY,
ATTN: JOHN DORNEY, 4401 REEDY CREEK ROAD, RALEIGH, NC
27607. PLEASE PRINT OR TYPE
1. OWNER'S NAME: DAVIDSON COUNTY INTEGRATED SOLID WASTE
2. MAILING ADDRESS: 220 DAVIDSON COUNTY LANDFILL ROAD
SUBDIVISION NAME
CITY: LEXINGTON STATE: NC ZIP CODE: 27292
PROJECT LOCATION ADDRESS, INCLUDING SUBDIVISION NAME (IF DIFFERENT FROM
MAILING ADDRESS ABOVE):
3. TELEPHONE NUMBER: (HOME) (WORK) [phone]
4. IF APPLICABLE: AGENT'S NAME OR RESPONSIBLE CORPORATE OFFICIAL, ADDRESS,
PHONE NUMBER:
G. N. RICHARDSON AND ASSOCIATES. INC.
425 NORTH BOYLAN AVENUE
RALEIGH. NORTH CAROLINA 27603
[phone]
5. LOCATION OF WORK (PROVIDE A MAP, PREFERABLY A COPY OF USGS TOPOGRAPHIC MAP
OR AERIAL PHOTOGRAPHY WITH SCALE):
COUNTY: DAVIDSON - NEAREST TOWN: LEXINGTON
SPECIFIC LOCATION (INCLUDE ROAD NUMBERS, LANDMARKS, ECT.) NORTH OF ROY LOPP
ROAD AND EAST OF TURNER ROAD NORTH OF HWY 64 & I-85 INTERCHANGE AS SHOWN IN
FIGURE 1.
6. IMPACTED OR NEAREST STREAMIRIVER: JIMMY'S CREEK RIVER BASIN: YADKIN
7. (a) IS PROJECT LOCATED NEAR WATER CLASSIFIED AS TROUT, TIDAL SALTWATER, (SA),
HIGH QUALITY WATERS (HQW), OUTSTANDING RESOURCE WATERS (ORW), WATER
SUPPLY (WS-I OR WS-II)? YES F] NO ® IF YES, EXPLAIN:
(b) IS THE PROJECT LOCATED WITHIN A NORTH CAROLINA DIVISION OF COASTAL
MANAGEMENT AREA OF ENVIRONMENTAL CONCERN (AEC)? YES 0 NO
(c) IF THE PROJECT IS LOCATED WITHIN A COASTAL COUNTY (SEE PAGE 7 FOR LIST OF
COASTAL COUNTIES), WHAT IS THE LAND USE PLAN (LUP) DESIGNATION? NOT
APPLICABLE
8. (a) HAVE ANY SECTION 404 PERMITS BEEN PREVIOUSLY REQUESTED FOR USE ON THIS
PROJECT? YES ® NO ? IF YES, PROVIDE ACTION I.D. NUMBER OF PREVIOUS PERMIT AND
ANY ADDITIONAL INFORMATION (INCLUDE PHOTOCOPY OF 401 CERTIFICATION): NWP 2
ACTION ID 199201317 AUGUST 3 .1992 - 404 PERMIT AND 401 CERTIFICATION ATTACHED
(b) ARE ADDITIONAL PERMIT REQUESTS EXPECTED FOR THIS PROPERTY IN THE FUTURE?
YES E] NO ® IF YES, DESCRIBE ANTICIPATED WORK: NO ADDITIONAL PERMITS ARE
ANTICIPATED
9. (a) ESTIMATED TOTAL NUMBERS OF ACRES IN TRACT OF LAND: 227
(b) ESTIMATED TOTAL NUMBER OF ACRES OF WETLANDS LOCATED ON PROJECT SITE: 5
10. (a) NUMBER OF ACRES OF WETLANDS IMPACTED BY THE PROPOSED PROJECT BY:
FILLING: _ EXCAVATION: _
FLOODING: _ OTHER : _
DRAINAGE : TOTAL ACRES TO BE IMPACTED: _
(b) (1) STREAM CHANNEL TO BE IMPACTED BY THE PROPOSED PROJECT (IF RELOCATED,
PROVIDE DISTANCE BOTH BEFORE AND AFTER RELOCATION:
LENGTH BEFORE: _ FT AFTER: _ FT
WIDTH BEFORE (based on normal high water contours): 20 FT
AVERAGE DEPTH BEFORE: 4 FT AFTER: 4 FT
(b) (2) STREAM CHANNEL IMPACTS WILL RESULT FROM: (CHECK ALL THAT APPLY)
OPEN CHANNEL RELOCATION: _ PLACEMENT OF PIPE IN CHANNEL: X
CHANNEL EXCAVATION: _ CONSTRUCTION OF A DAM/FLOODING:
OTHER:
11. IF CONSTRUCTION OF A POND IS PROPOSED, WHAT IS THE SIZE OF THE WATERSHED
DRAINING TO THE POND? _ WHAT IS THE EXPECTED POND SURFACE AREA?
12. DESCRIPTION OF PROPOSED WORK INCLUDING DISCUSSION OF TYPE OF MECHANICAL
EQUIPMENT TO BE USED? (ATTACH PLANS; 81/2 BY 11 DRAWINGS ONLY)
TEMPORARY ROAD CROSSING TO BE CONSTRUCTED USING 48 INCH PIPES BACKFILLED.
AND COVERED WITH AGGREGATE MATERIALS. GEOTEXTILE AND RIPRAP.
13. PURPOSE OF PROPOSED WORK: TEMPORARY ACCESS TO NEW BORROW AREA TO OBTAIN
REQUIRED DAILY COVER FOR LANDFILL UPON TERMINATION OF BORROW ACTIVITIES,
ROAD CROSSING WILL BE REMOVED.
14. STATE REASONS WHY IT IS BELIEVED THAT THIS ACTIVITY MUST BE CARRIED OUT IN
WETLANDS (INCLUDE ANY MEASURES TAKEN TO MINIMIZE WETLAND IMPACTS)
ROAD CROSSING HAS BEEN DESIGNED TO AVOID ALL WETLANDS (FIGURE 2).
15. YOU ARE REQUIRED TO CONTACT THE US FISH AND WILDLIFE SERVICE AND/OR
NATIONAL MARINE FISHERIES SERVICE REGARDING THE PRESENCE OF ANY FEDERALLY
LISTED OR PROPOSED FOR LISTING ENDANGERED OR THREATENED SPECIES OR CRITICAL
HABITAT IN THE PERMIT AREA THAT MAY BE AFFECTED BY THE PROPOSED PROJECT.
DATE CONTACTED: 2/8/88 FOR SOLID WASTE PERMIT 29-06
16. YOU ARE REQUIRED TO CONTACT THE STATE HISTORIC PRESERVATION OFFICER
(SHPO) REGARDING THE PRESENCE OF HISTORIC PROPERTIES IN THE PERMIT AREA
WHICH MAY BE AFFECTED BY THE PROPOSED PROJECT. DATE CONTACTED 2/17/88.
17. DOES THE PROJECT INVOLVE AN EXPENDITURE OF PUBLIC FUNDS OR THE USE OF PUBLIC
(STATE) LAND? YES ? NO ® (IF NO, GO TO 18)
(a) IF YES, DOES THE PROJECT REQUIRE PREPARATION OF AN ENVIRONMENTAL
DOCUMENT PURSUANT TO THE REQUIREMENTS OF THE NORTH CAROLINA
ENVIRONMENTAL POLICY ACT? YES 7 NO 7
(b) IF YES, HAS THE DOCUMENT BEEN REVIEWED THROUGH THE NORTH CAROLINA
DEPARTMENT OF ADMINISTRATION STATE CLEARINGHOUSE YES F? NO
IF ANSWER 17b IS YES, THEN SUBMIT APPROPRIATE DOCUMENTATION FROM THE STATE
CLEARINGHOUSE WITH THE NORTH CAROLINA ENVIRONMENTAL POLICY ACT.
QUESTIONS REGARDING THE STATE CLEARINGHOUSE REVIEW PROCESS SHOULD BE
DIRECTED TO MS. CHRYS BAGGETT, DIRECTOR STATE CLEARINGHOUSE, NORTH
CAROLINA DEPARTMENT OF ADMINISTRATION, 116 WEST JONES STREET, RALEIGH,
NORTH CAROLINA 27603-8003, TELEPHONE [phone].
18. THE FOLLOWING ITEMS SHOULD BE INCLUDED WITH THIS APPLICATION IF PROPOSED
ACTIVITY INVOLVES THE DISCHARGE OF EXCAVATED OF FILL MATERIAL INTO
WETLANDS:
(a) WETLAND DELINEATION MAP SHOWING ALL WETLANDS, STREAMS, LAKES, AND
PONDS ON THE PROPERTY (FOR NATIONWIDE PERMIT NUMBERS 14, 18, 21, 26, 29, AND 38).
ALL STREAM (INTERMITTENT AND PERMANENT) ON THE PROPERTY MUST BE SHOWN ON
THE MAP. MAP SCALES SHOULD BE I INCH EQUALS 50 FEET OF 1 INCH EQUALS 100 FEET
OF THEIR EQUIVALENT.
(b) IF AVAILABLE, REPRESENTATIVE PHOTOGRAPH OF WETLANDS TO BE IMPACTED BY
PRODUCT.
(c) IF DELINEATION WAS PERFORMED BY A CONSULTANT, INCLUDE ALL DATA SHEETS
RELEVANT TO THE PLACEMENT OF THE DELINEATION LINE.
(d) ATTACH A COPY OF THE STORMWATER MANAGEMENT PLAN IF REQUIRED.
(e) WHAT IS LAND USE OF SURROUNDING PROPERTY? LANDFILL & AGRICULTURE
(o IF APPLICABLE, WHAT IS PROPOSED METHOD OF SEWAGE DISPOSAL? NA
SIGNED AND DATED AGENT AUTHORIZATION LETTER, IF APPLICABLE.
NOTE: WETLANDS OR WATERS OF THE US MAY NOT BE IMPACTED PRIOR TO:
1. ISSUANCE OF A SECTION 404 CORPS OF ENGINEERS PERMIT,
2. EITHER THE ISSUANCE OR WAIVER OF A 401 DIVISION OF WATER QUALITY
CERTIFICATION, AND
3. (IN THE TWENTY COASTAL COUNTIES ONLY), A LETTER FROM THE NORTH
CAROLINA DIVISION OF COASTAL MANAGEMENT STATING THE PROPOSED
ACTIVITY IS CONSISTENT WITH THE NORTH CAROLINA COASTAL MANAGEMENT
PROGRAM,
Z?42LLI
OWNER'S/AGENT'S SIGNATURE
DAT
(AGENT'S SIGNATURE VALID ONLY
IF AUTHORIZATION LETTER FROM
THE OWNER IS PROVIDED).
DEPARTMENT OF THE ARMY
WILMINGTON DISTRICT, CORPS OF ENGINEERS
P.O. BOX 1890
WILMINGTON, NORTH CAROLINA 28a0
RECEIVED
CANT DRESSER & MCKEE
IN REPLY REFER TO August 3, 1992 , ALEIr,H
Regulatory Branch
Nationwide Permit No. 26 (PDN) A U G 4 1992
Action ID. 199201317
Davidson County
C/O Mr. L. Norman Shrone
Court House Annex
Post Office Box 1067
Lexington, North Carolina 27292
Dear Mr. Shrone:
Reference is made to my letter of June 17, 1991. This letter confirmed
the May 24, 1991 wetlands survey verification of the proposed Davidson County
Land Fill adjacent to an unnamed tributary of Hamby Creek and Rick Fork Creek,
east of Lexington, Davidson County, North Carolina.
Reference is also made to the conceptual design and permit application
(PDN) for the aforementioned project received from Mr. Mark N. Hargrove of
Camp Dresser & McKee (engineering consultant for project) on July 16, 1992.
This proposed project design showed jurisdictional impacts of approximately
i.6 acres on unnamed/above headwater tributaries of Hamby Creek.
For the purposes of the U.S. Army Corps of Engineers' Regulatory Program,
Title 33, Code of Federal Regulations (CFR), Part 330.6, published in the
Federal Register on November 22, 1991, lists nationwide permits.
Authorization was provided, pursuant to Section 404 of the Clean Water Act,
for discharges of dredged or fill material into headwaters and isolated waters
provided:
a. the discharge does not cause the loss of more than 10 acres of waters
of the United States;
b. the permittee notifies the District Engineer if the discharge would
cause the loss of waters of the United States greater than one acre in
accordance with the "Notification" general condition. For discharges in
special aquatic sites, including wetlands, the notification must also include
a delineation of affected specific aquatic sites, including wetlands; and
c. the discharge, including all attendant features, both temporary and
permanent, is part of a single and complete project.
? Si^rC o
s ?
3
State of North Carolina
Dcpartment of Environment, Health, and Natural Resources
Division of Environmental Management
512 North Salisbury Street a Raleigh, North Carolina 27604
James G. Martin, Governor August 26, 1992 A. Preston Howard, Jr., P.E.
William W. Cobey, Jr., Secretary Acting Director
Mr. Robert McIntyre
Davidson County Landfill
Route 1, Box 678
Lexington, N.C. 27292
Dear Mr. McIntyre:
Post-R7 brand lax transmittal memo 7671 N of wfl•- ?

O G W /! ? t
From C I
co. C M co.TA v tdSo-J Cou of

Dept. VIP P
phone 0?e 9
D
FaxN ! -781' FaxtY 1
Subject: Proposed Fill in Wetlands
Davidson County landfill
Davidson County
DDM Project 192378, COE f 199201317
Upon review of your request for Water Quality Certification
to place fill material in 1.6 acres of waters and wetlands for
development of the Dvaidson County landfill located at
SR 2014 in Davidson County, we have determined that the proposed
fill can be covered by General Water Quality Certification No.
2671 issued January 1, 1992. A copy of the General Certification
is attached. This Certification may be used in qualifying for
coverage under Corps of Engineers' Nationwide Permit No. 26.
If you have any questions, please contact John Dorney
at 919/733-1786.
Sincerely,
$. Pr stop Howard, Jr: P E.
APH:JD 1
Attachment
cc: Wilmington District Corps of Engineers
Corps of Engineers Raleigh Regional Office
Winston- Salem DEM Regional Office
Mr. John Dorney
Central Files
REGIONAL 04-71 C ES
Asheville Fayetteville Mooresville Raleigh Washington Wilmington Winswn•SLlem
7041251.6208 919/486.1541 704/663-1699 9 19/57 1-4700 9191946.6481 9191395.3900 919/896.7007
Pollution Prevention Pays
P.O. Box 29535, Raleigh. North CLrolina 27626-0535 Telephone [phone]
An Equal Opportunity AJfirmative Action Employer
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n WETLANDS DELINATION G.N. RICHARDSON & ASSOCIATES, INC
FOR DAVIDSON COUNTY I DAMOSON COUNTY LANDFILL
A- BORROW AREA CROSSING 42E N. BZ LAN AVENUE RAL DGH. N.C. 27 o3
4', ;' LANDFILL . ?.....,...,a ..y. '. AL WWWAWA.COM
U.S. ARMY CORPS OF ENGINEERS --??
Wilmington District
Action ID: 199920406 County: Davidson ' .9 7999
1
Notification of Jurisdictional Determination
Property
Authorized
Owner Davidson County Landfill Agent G.N. Richardson & Assoc.
Address P.O. Box 1067, Lexington. North Carolina Philip May
27293-1067 Address 425 N. Boylan Avenue. Raleigh. NC 27603
Telephone Number 336
Telephone Number 919 828-0577
Size and Location of Property (svaterbody, Highway name/number, town, etc.) Davidson County
Landfill proposed expansion of the existing facility site located off of Roy Loop Road, adjacent to
Hamby Creek, near Lexington, in Davidson County, North Carolina. Related Action ID
199201317.
Indicate Which of the Following apply:
0 There are wetlands on the above described property which we strongly suggest should be delineated and surveyed.
The surveyed wetland lines must be verified by our staff before the Corps will make a final jurisdictional
detemlination on your property.
0 Because of the size of your property and our present workload, our identification and delineation of your wetlands
cannot be accomplished in a timely manner. You may wish to obtain a consultant to obtain a more timely
delineation of the wetlands. Once the consultant has flagged a wetland line on the property, Corps staff will
review it, and, if it is accurate, we strongly recommend that you have the line surveyed for final approval be the
Corps. The Corps will not make a final jurisdictional determination on your property without an approved survey.
The wetlands on your lot have been delineated, and the limits o the Corps jurisdiction have been explained to
you. Unless there is a change in the law or our published r-0ulations, this determination may be relied upon
or a period not to exceed frve years from the date of this notitcatiQIL
0 There are no wetlands present on the above described property which are subject to the permit requirements of
section 404 of the Clean Water Act (33 USC 1344). Unless there is a change in the law or our published
regulations, this determination may be relied upon for a period not to exceed five years from the date of this
notification.
0 The project is located in one of the 20 Coastal Counties. You should contact the nearest State Office of Coastal
Management to determine their requirements.
Placement of dredged or fill material in wetlands on this property without a Department of the
Army permit is in most cases a violation of Section 301 of the Clean Water Act (33 USC 1311). A
permit is not required for work on the property restricted entirely to existing high ground. If you
have any questions regarding the Corps of Engineers regulatory program, please contact
John Thomas _ / iat 919,- 876 - 8441 extension 25
Project Manager Signature
Date Feb 5. 1999
ion Date F6' 5, 2
SURVEY PLAT OR FIELD SKETCH OF DESCRIBED PROPERTY AND THE WETLAND
DELINEATION FORM MUST BE ATTACHED TO THE YELLOW (FILE) COPY OF THIS FORM.
LEXINGTON EAST QUADRANGLE
NORTH CAROLINA-DAVIDSON CO.
7.5 MINUTE SERIES (TOPOGRAPHIC)
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CONTOUR INTERVAL 10 FEET n 111' LITM GRID AND 1994 MAGNETIC NORTH
NATIONAL GEODETIC VERTICAL DATUM OF 1929 DECLINATION AT CENTER OF SHEET
G.N. RICHARDSON & ASSOCIATES, INC.
Davidson County Landfill
USGS Site Map Geological Engineering and 425 N. Boylan Avenue Raleigh, North Carolina
(919)-828-0577 Fax:[phone] www.gnra.com
SCALE: DRAWN BY: CHECKED BY: DATE: PROJECT NO. FIGURE NO. FILE NAME
AS SHOWN A.W.H P.W.M. 2/17/99 DAVDCO-16 1
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SCALE: DRAWN BY: CHECKED BY: DATE: PROJECT NO. FIGURE NO. FILE NAME
1"=100' qWH D.T.D. 2/17/99 DAVDCO-16 2
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G.N. RICHARDSON & ASSOCIATES, INC.
Davidson County Landfill
Road Crossing Design Engineering and
_rvices
Geological
425 N. Boylan Avenue Raleigh, North Carolina
(919)-828-0577 Fax:[phone] www.grrra.com
SCALE: DRAWN BY: CHECKED BY: DATE: PROJECT NO. FIGURE NO. FILE NAME
D.T.D. P.K.S. 2/17/99 DAVDCO-16 3
SHEET 1 OF 7
PROJECT Davidson County Landfill - West Borrow Area JOB NO. DAVDCO-16
DATE 2/4/99
SUBJECT Culvert Analysis COMPUTED BY DTD
CHECKED BY P K
Objective To analyze culverts for inlet and outlet control. Verify that the allowable headwater depth
is not exceeded.
Reference Debo, T.N., and Reese, A.J., Municipal Storm Water Management, Lewis Publishers,
Boca Raton, FL, 1995, pp.438-442.
Analysis
- Determine Peak Flow Rate to Drop Inlet:
Use Rational Method (QP = CIA)
- Determine Input Parameters:
- HWALLOW = Allowable Headwater Depth (ft)
- N = Number of Pipes Used
- QPIPE = QP /hl (CfS)
- D = Culvert Diameter (in)
- Type of Culvert (i.e., Concrete, CMP, etc.)
- L = Culvert Length (ft)
- s = Culvert Slope (ft/ft)
- n = Manning's Number
- ke = Entrance Loss Coefficient
- d, = Critical Depth (Use Critical Depth Figures) (ft)
- Find actual HW for the culvert for both inlet & outlet control: (The condition with the
greatest HW governs.)
- For Inlet Control:
Enter Inlet Control Nomograph with D & QPIPE and find HW/D for the
proper entrance type.
Compute HW. If HW exceeds HWAI.LOW, try larger culvert.
CULVERT.WPD
G.N. RicHARDSON & ASSOCIATES
Engineering and Geological Services
425 N. Boylan Avenue, Raleigh, NC 27603
Telephone: [phone]
SHEET 2 OF -7
PROJECT Davidson County Landfill - West Borrow Area JOB NO. DAVDCO-16
DATE 2/4//99
SUBJECT Culvert Analysis COMPUTED BY DTD
CHECKED BY PAS
- For Outlet Control:
Enter Outlet Control Nomograph with L, Ke, & D.
To compute HW, connect the length scale for the type of entrance condition
and culvert diameter scale with a straight line, pivot on the turning line, and
draw a straight line from the design discharge through the turning point to
the head loss scale H. Compute HW from the following equation:
HW=H+ho-LS
d +D
where: ho = 2 or tailwater depth, whichever is greater.
If HW exceeds HWALLOW, try larger culvert.
G.N. RICILARDSON & ASSOCIATES
Engineering and Geological Services
425 N. Boylan Avenue, Raleigh, NC 27603
Telephone: [phone]
G.N. Richardson & Associates SHEET: 7i$ 3/7
ENGINEERING AND GEOLOGICAL SERVICES JOB #: DAVDCO-16
DATE: 02/01/99
Davidson County Landfill BY: DTD
Stream Channel Crossing CHKD BY:
Obiective:
Using Manning's Equation, determine the average flow of the stream channel as observed and size
the appropriate culvert size(s) to handle the determined flow.
Manning Equation:
Q= 1.486 A R2J3 5112
n
Where: Q= Flow (cfs)
n= Manning roughness coefficient (NC E&S Section 8.04)
A= Cross-sectional area of flow (ftz)
R= Hydraulic radius (ft); A/P; P=wetted perimeter
s= Longitudinal slope of the water surface (ft/ft)
Assumptions:
1. It has been observed for the last two years that the stream channel flows dry for the majority
of the year.
2. A series of beaver dams and other debris cause stormwater to pond upstream of the
road crossing area.
3. Average flow through the channel has been observed to be approximately 6-12 inches in depth
across the width of the channel (20 ft.). To be conservative assume a flow depth of 2 feet.(HAx)
Flow Cross-section:
w= 20 ft
d= 0.5-1 ft (Typical)
d= 1-2 ft (Peak)
s= 0.5 %
Channel Flow:
Q= ? cfs
n= 0.035 Earth-n = 0.02; Minor Irregularities-n = 0.005; Minor Obstructions-n = 0.010
s= 0.005 ft/ft
Depth ft 0.5 1.0 1.5 2.0
P (ft) = 21 22 23 24
A (ft2) = 10 20 30 40
R (ft) = 0.476 0.909 1.304 1.667
Q (cfs) = 18 56 108 169
G.N. Richardson & Associates SHEET 4/7
ENGINEERING AND GEOLOGICAL SERVICES JOB #: DAVDCO-16
DATE: 2/3/99
Davidson County Landfill BY PKS
Culvert Analysis CHKD BY: Dt-D
Peak Flow Rate:
Q (cfs) = 169.0
Culvert Parameters: (User Input)
Allowable HW Depth (ft) _
Number of Pipes, N =
Culvert Diameter, D (in) _
Type of Culvert= -
Culvert Length, L (ft) _
Culvert Slope, S (ft/ft) =
Manning's Number, n =
Entrance Loss Coef., ke =
Critical Depth (ft) =
Case 1: Inlet Control
5
2 Qpipe (cfs) = 84.5
48
CMP
40
0.005
0.024
0.5
2.8
HW/D = 1.22 (User Input - From Inlet Control Nomograph)
HW (ft) = 4.9
Case 2: Outlet Control
no (ft) = 3.4
H (ft) = 1.7 (User Input - From Outlet Control Nomograph)
HW (ft) = 4.9
OUTLET CONTROL GOVERNSI
5/7
2.4b
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DISCHARGE-0 -CFS
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8
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4L
0
1000
BUREAU OF PUBLIC ROADS
JAN. 1964
2000
DISCHARGE-O-CFS
4000
CRITICAL DEPTH
CIRCULAR PIPE
FIGURE 3-6.1M(1)
Exhibit 12
617
180 -}-- 10,000
168 I 8,000
EXAMPLE
156 6,000 D- 36 inches (3.0 toot)
144 6,000 0.66 eta 6.
4,000 (3)

I32 MM • s. 6.
3,000 0 („)
120 (1) 1.6 3.4 5. 6.
a 2,000 (2) 2.1 6,3 s.
108 A. (3) 2.2 6.6 4.
a 'D in toot 3. 4.
96 1,000
eoo -
3.
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600 3.
500
72 400
= 300
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use straight inclined line through
3 .6
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illustrated .
. .6
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IS
1.0 .S
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- 12
HEADWATER DEPTH FOR
C. M. PIPE CULVERTS
BUREAU OF PU BLIC ROADS JAN. 1963 WITH INLET CONTROL
VI-12
Exhibit 16
0 7 /7
2000

1000 M
W aHli
H .4
C
h'
800 .' .5
Sbp* So--.
600 120 SUBMERGED OUTLET CULVERT FLOWING FULL .6
500 108
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iy
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4
= 50
36
,
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33
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M
Q / 0
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400 10
21 S00
500
10 18
8
20
6 15
S
4
12
3
2
BUREAU OF PUBLIC ROADS .YM. 1965
HEAD FOR
STANDARD
C. M. PIPE CULVERTS
FLOWING FULL
n=0.024
VI-16