SW8881205_Historical File_19881214

ICI THE JOHN R. McADAMS COMPANY&INFO
CONSULTING ENGINEERS [
200 HAYES BUILDING, GLEN LENNOX CENTER 1WC g9iQQ
91�§P7079
P.O. BOX 2896, CHAPEL HILL, NORTH CAROLINA 27515 FAX [phone]
1N [Min&rk Re gloL1al NCI
LETTER OF TRANSMITTAL
To: Mr. Donald Safrit
Division of Environmental Management
Water Quality Section
7225 Wrightsville Avenue
Wilmington, North Carolina 28403
Re: Landfall Center - Section III
Dear Sir or Madam:
We are sending you the following item(s):
Date: -December 14, 1988
Job No:ADG 8800
COPIES
DATE
NO
I DESCRIPTION
1I
lCo-py.of Operation and Maintenance Schedule with
ResRonsibility Statement signed by owner.
These are transmitted as checked below:
As requested
For approval
For review and comment
X For your use
Remarks: Dear Mr. Safrit: Please find enclosed one copy of signed responsibility
statement for the above referenced project. Please include this with
our December 5, 1988 submittal. Please call if you have any questions.
Thank vou.
Copy To: Signed: \ V bV
o taect
than S. Butters
Manager

/,'NGINEERING & FACILITIES
C. ED HILTON, JR., P.E.
Director
WYATT E. BLANCHARD, P.E.
County Engineer
MEMORANDUM
NEW HANOVER COUNTY
ENGINEERING AND FACILITIES DEPARTMENT
414 CHESTNUT STREET
WILMINGTON, NORTH CAROLINA 28
TELEPHONE [phone] DECEIVED
TO: Mark: Hawes
DEM
FROM: Jim Craig C�
Conservat' Engineer
RE: Sedimentation and Erosion Control Plan
Please, reviow the attached plan.
If I can help, Please contact me.
JC/is
attachment
DEC 151983
)Yilmin&n Regional Office
nru

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T fM JHN R. McADAMS COMEWY, IW.
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North Carolina Department
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Table of Rational runoff coefficients.
:sssssssssssssssssssssssssssss�sssasssasssas:sass=ascnas:sss
- Description
C
Source
saescsssssssssssssssssssssss:ss�sssssssssssssssssssss=scssss
Roof, inclined
1.00
Malcom
Street, driveway, sidewalk.
0.95
Chow, 1964
Parking lot
0.90
Malcom
Roof, f 1•at
0.90
Malcom
Commercial, generalized
0.85
Malcom
Apartments, schools, churches
0.60
WSSC, c.1968
Residences, 10 dwellings/acre
0.60
Malcom
Residences, 6 dwellings/acre
0.55
Malcom
Residences, 4 dwellings/acre
0.50
Malcom
Residences, 2 dwellings/acre
0.40
Malcom
Unimproved cleared area
0.35
Malcom
..,Lawn, dense soil, steep >7%
0.35
Chow. 1964
`-Playground
0.35
Char, 1964
Park, cemetery
0.25
-.Chow, 1964
Lawn, dense soil, avg 2-7%'
0.22
Chow, 1964
Wooded; sparse ground litter
0.20
Malcom
Lawn, dense soil, flat 2%
0.17 -
Chow, 1964
Lawn, sandy, aVg 2-7%
0.15
Chow, 1964
Lawn, sandy, flat <2%
0.10
Chow, 1964
Wooded, deep ground litter .
0.10•
Malcom
ass:ssssssassssssssszssas=sssssscsssssssss=ss�sssaoo=ascsso�
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Exhibit '1

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132
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4.
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120
!.1 1.4
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131 It.! L7
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106
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HW ENTRANCE
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HEADWATER
DEPTH FOR
12
CONCRETE PIPE CULVERTS
MEAOWATER SCALES 263
WITH
INLET
CONTROL
REVISCO MAN064
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THE JOIN R. McADAMS COMPANY, INC.
P.O. Sox 2M
Chapel Hill. North Carolina 27515
PAGE OF Z
J R MCA JOB NO. DATE It /Z 7- 1 Avg BY CHECKED BY
CLIENT PROJECT LANVrA+,L
711T
SLJ9UECT P-PTfNTl0AJ PONT) - 5A JPA rAr,&c--S
19A 7. 50 Ac
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A,
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4"y v f ou
.50
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_¢�-
• THE JOHN R. McADAMS COMPANY, INC.
P.O. Box 28M
Chapel Hill, North Carolina 27515
PAGE � OF .........Z
J R. McA JOB NO. DATE BY CHECKED BY
(Date)
CLIENT PROJECT
SUBJECT
k)
. r ,
4, v 3A013
4. L 3r y 3 30`)
m -qa'_ G�'j �D�G� GJ f 0✓ w f b V �
-- .. _.... - -ir_!C
1

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SA/DA - 85% TSS REMOVAL WITH 30' VEGETATIVE FILTER
L
?!PER 3. OFT 3 5FT-4.O&T 4.5FT 5.AFT 5.5PT 6. OFT 6.5FT 7. OFT 7.5FT
10% .9. .8 .7 .6 .5
20% 1.7 1.3 1.2 1.1 1.0 .9 .8 .7 ..6 .5
30% 2.5 2.2 1.9 1.8 1.6 1.5 1.3 1.2 1.0 .9
40% 3.4 3.0 2.6 2.4 2.1 1.9 1.6 1.-4 1.1 1.0
50% 4.2 3.7 3.3 3.0 2.7 2.4 2.1 1.8 1.5 1.3
60% 5.0 4.5 3.8 3.5 3.2 2.9 2.6 2.3 2.0 1.6
-.70% 6.0 5.2 4.5 4.1 3.7 3.1 2.9 2.5 2.1 1.8
g0% 6-.8 6.0 5.2 4.7 4.2 3.7 3.2 2.7 2.2 2.0
90$ 7.5 6.5 5.8 5.3 4.8 4.3 3.8 -- 3.3 2.8 1.3
100% 8.2 7.4 6.8 6.2 5.6 5.0 4.4 3.8 3.2 2.6
SA/DA - >•90% TSS REMOVAL
FOR WET DETMMON WITHOUT VEGETATIVE FILTER
IMPER.% 3.0FT 3.5FT 4.OFT 4.5FT 5.OFT 5.5FT 6.OFT 6.5FT 7.OFT 7.5FT
10 %
1.3-
1.0
.8
.7
.6
.5
.4
.3
.2
.1
_ 20%
2 A
.2.0
-1'. 8
1.7
1.5
1.4
1.2
1.0
.9
.6
30%
3.5
3.0
2.7
2.5
2.2
1.9
1.6
1.3
1.1
.8
40%
4.5
4.0
3.5
3.1
2.8
2.5
2.1
1.8
1.4
1.1
• 50%
5.6
5.0
4.3
3.9
3.5
3.1
2.7
2.3
1.9
1.5
60%-
7.0
6.0
5.3
4.8
4.3
3.9
3.4
2.9
2.4
1.9
70%
8.1
7.0
6.0
5.5
5.0
4.5
3.9
3.4
2.9
2.3
80%
9.4
8.0
7.,0
6.4
5.7
5.2
4.6
4.0
3.4_
2.8
96%
10.7
9.0
7.9
7.2
6.5-
5.9 _
5.2
_
9.6
3..9
3.3.
100%
12.0
10.0
8.8
8.1
7.3
6.6
5.8
5.1
4..3
.3.6
,i.

THE JOHN R. McADAMS COMPANY, INC. .
P.O. Box 2886
Chapel HIII, North Carolina 27515 PAGE i OF
J R MCA JOB NO. AQ& "'ACNE rI DATE M 5 f PJS BY CHECKED BY
(Date
CUENF PROJECT
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RECEIVED
THE JOHN R. McADAMS COMPANY, INQG" ? 1�t
CONSULTING ENGINEERS
�ibington Region6l Office
200 HAYES BUILDING, GLEN LENNOX CENTER (91@Fht7-7079
P.O. BOX 2896, CHAPEL HILL, NORTH CAROLINA 27515 FAX [phone]
04aI -991a9 III0RI &IIaCAI I
To: Mr. Donald Safrit
Division of Environmental Management
Water Quality Section
7225 Wrightsville Avenue
Wilmington, North Carolina 28403
Re: Landfall Center - Section III
Dear Sir or Madam:
We are sending you the following item(s):
Date: December 5, 1988
p ECEIVC n
U
DEC 9 1988
D F. ©�
PROD # F�e {
Job No: ADG 8800
COPIES
DATE
NO
DESCRTPTION
3
8
Stormwater System Calculations
3
3
DEM Evaluation Checklist
3
1
Operation & Maintenance Schedule Detention Pone
3
2
Construction Drawings
These are transmitted as checked below:
As requested For your use
X For approval
For review and comment
Remarks: Dear Mr. Safrit: Enclosed find calculations and plans for the
above referenced project. Please review and call me or Jon Butters
if you have any questions. Thanks.
Copy To: Signed: C" I,-�ict�'c
Richard J. Dickie, E.I.T.