SW8881211_Historical File_19941107

DENSITY REVIEW
PROJECT NAME: `3Gck�4 S Cr2�I� _ REVIEWER: A P-
PROJECT NO.: ;9 R j 2 l l DATE: 11—"1— Gl 4--
DRAINAGE BASIN:_ J2.Ckeys C/e ek. CLASS: C Sw ALLOWABLEB/U%: 30
SITE AREA.= 950 + 576 K S70 4- '1Z (s50X (35)
z = ICo. 51 zc
"'Z(56v0,* Gqs) "/z (3709 110) f 'IZ 3 40 4 1 Iv) z .c 30 x Z
-71`ll(x�sF
ROAD AREA= (4x !2o x Z) + (�s 2 Ivu� 452, 312) C(Cv 35 �ZO� + Z (. Z! ¢4) (.ZS z�
4Z, 9 Z/ sf
NUMBER OF LOTS = 1 I
BUILT UPON AREA CALCULATION
Built -upon Area/Lot=[(site * density) -(road area)]/# lots
(-7/ ct too 5e, 3) — 4ZgZ/j 1( = 1670�
Z 5 0
DEED RESTRICTS ALLOWABLE BUILT -UPON AREA PER LOT TO 1 SF INCLUSIVE
OF RIGHT-OF-WAY. 01/
5 -;;►'2 /yYin. -1 2GrG'.
CONEY[ENTS
U CuI-cue-sac woes no4 m24c SUP Coo on close up, 5S on over-.all.
Cj E� �-�,ce /-ozd Ole-/Q-/.
U CQc4'; do 1,?1zr-5eer&, P 5111ern,617 f ? A5:5c&^. 25'-
INFORMATION REQUIRED
PROVIDED RE UES
SUBMITTAL FORM
DENSITY CALCULATIONS
VELOCITY CALCULATIONS
SITE PLAN WITH:
PROPERTY LINES
STREET DETAIL
LOCATION MAP
SWALE X-SECTION_
WETLANDS
,i

Date Design Andrew and Kuske Seet
11-Z, q T 1 202 N. Fifth Ave. CONSULTING ENGINEERS, INC. Wilmington, N.C. 28401 Of
Check Job For Job No.
PXICA 1t�.n At,
FCC . 1 ry aglow s Aic,
1 cb e 1 >t?60 sr- IEfto
'TO` �fwir'tiKVto�S
*(440 sF
ZI O / 1cl 0 '6P
to l rhI LV��S = .7 3 zn
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p EC E 0 W
uD
NOV 0 2 1994
D. E Awl
I?Rad gsiZcr

State of North Carolina
Department of Environment, Health, and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr., Governor DIVISION OF ENVIRONMENTAL MANAGEMENT Bob Jamieson
Jonathan B. Howes, Secretary WATER QUALITY SECTION Regional Manager
November 7, 1994
Mr. Jack Stocks, R.L.S.
211 North Fifth Avenue
Wilmington, North Carolina 28401
Subject: ADDITIONAL INFORMATION
Stormwater Project No. 881211
Jackey's Creek Subdivision Revision
Brunswick County
Dear Mr. Stocks:
The Wilmington Regional Office received a revised Stormwater Submittal for Jackey's Creek
Subdivision on November 2, 1994. A preliminary review of that information has determined that the
submittal for the subject project is not complete. The following information is needed to continue the
stormwater review:
1. The 55' Cul-de-sac radius on the overall subdivision plan detail does not match up with the
60' right-of-way radius shown on the Phase I plan. Please correct.
/2. Please add a detail of the split entrance road.
3. Please label the pavement intersection radius. Twenty-five feet was assumed for calculation
�r purposes.
4. By copy of this letter to Mr. Delaney Aycock, the building inspector, I am notifying him
that this project can be issued building permits, if he chooses to issue permits without the
Certification. A revised submittal has been received and the project lacks only minute
details in order to be issued a revised Certification.
5. Provide three copies of revised sheets.
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 • Telephone [phone] Fax [phone]
An Equal Opportunity Affirmative Action Employer

Mr. Stocks
November 7, 1994
Stormwater Project No. 881211
Please note that this request for additional information is in response to a preliminary review. The
requested information should be received by this Office prior to December 7, 1994, or the submittal will
be returned as incomplete.
If you have any questions concerning this matter please feel free to call me at (910) "395-3900.
Sincerely,
Ms. Linda Lewis
Environmental Engineer
DA/arl: S:\WOS\STORMWAT\ADDINFO\881211_NOV
cc: Delaney Aycock, Brunswick County Building Inspections
(2) Linda Lewis
Central Files
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NEW HANOVER COUNTY _ NORTH CAROLINA
I. JACK G. STOCKS, CERTIFY THAT THIS PLAT WAS DRAWN UNDER MY
SUPERVISION FROM AN ACTUAL SURVEY MADE UNDER MY SUPERVISION. (DEED
DESCRIPTION RECORDED IN BOOK_., PAGE--), THAT THE BOU40ARIES
NOT SURVEYED ARE CLEARLY INDICATED AS DRAWN FROM INFORMATION FOUND
IN BOOK - , PAGE �; THAT THE RATIO OF PRECISION AS CALCULATED IS
1: ; THAT THIS PLAT WAS PREPARED IN ACCORDANCE WITH G.S. 47-30 f i
AS AMENDED TNESS MY ORIGIN L SIGNATURE, REGISTRATION NUMBER AND r:
SEAL THIS AY OF A.D., 19
Tm
06%il �iq�jdl,,'
A i
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a CA! ..
-a JACK G. STOCKS
_ N.C. REGISTRATION NO. L856
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NEW HANOVER COUNTY
NORTH CAROLINA
1 A NOTARY PUBLIC F T -. *
BU 0 HE COUNTY AND STATE. AFORESAID, CERTIFY THAT ,- S30'32 I0
z; _
JACK, G. STOCKS, REGISTERED LAND SURVEYOR PERSONN PP �'' ` C.I'I.1 # .a18.:
ALY APPEARED �'
BEFORE ME THIS DAY AND ACKNOWLEDGED THE EXECUTION OF THE FOREGOING �O�l'`' �
t, o
INSTRUMENT. WITNESS MY HAND AND OFFICIAL STAMP OR SEAL, THIS BJAA�
DAY OF , f9 FUTU�V_{RO(�I111
(2p)
f £VONNE M. SMITH
vTj-
NOTARY PUBLIC
MY COMMISSION EXPIRES 11 /14/96 - q.
CS iiik
IQ
BRUNSWICC COUNTY NORTH CAROLINA
Q'. -
Q Q C
o ,�5•�o Node � �.,�
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THE FOREGOING CERTIFICATE OFF EVONNE:AA, SMITH,NOTARY PUBLIC OF NEW � M ti ti
tti +►� 3.�, o �,
HANOVER COUNTY IS CERTIFIED TO BE CORRECT. FILED FOR. REGISTRATION
ON THE P.DAY OFs- .19—,ATOM/PM AND DULY RECORDED
IN CABINET` ,' 3 8!
' AT PAGE
. �` /
A`� ,SIi v F `fit Q1,lCe
ROBERT ROBINSON N
REGISTER OF DEEDS
By • . t ti, a S ,, / S7
.., Q
• �+Y
Aul
f
`CERTIFICATE of avrueRSH,P 1= ..I f � � � �r 0 DEDICATION AND JURISDICTION ! h P
'fir-C7G S/303
I (WE)=HER Y CERTIFY THAT I (W) 7 / $ S/'"'/•/5 5f{/
HEREBY E ARE THE OWNER(S) THE PROPERTY tS . .l 4r Oq 1
SHOWN AND DESCRIBED HEREO'd AND THAT I (WE) HEREBY ADOPT THIS PLAN
OF SUBDIVISION WITH MY (OUR) FREE CONSENT ESTABLISH THE MINIMUM •tQ n d7 � Q
"� .• {,y 1 �
BUILDING LINES AND DEDICATION OF ALL STREETS ALLEYS WALKS PARKS •.,r a �. 1�! �/ < as 10 4
CONSERVATION SPACE AND-OTFiER AREAS TO PUBLIC T .17 c' Cn OR PRIVATE USE AS
NOTED. ALL ROADS' AND DRA#NI " £AS _ 1
EMENTS ARE DEDICATED -FOR _ - - ..:-.., __. E
� b` 0
UTILITY 'P SES FURTHER. # (WE) CERTIFY
,a> ,
. THE LAND AS SHOWN HEREON
S LOCATED WITHIN THE SUBDIVISION S I4 �
U$D JURISDICTION BRUIdSW#CK COUNTY.
g u _zQ o o n ., 0 l
8 ` 3 4 --_ � �— t
PATE (v, N Q,
OWNER � c'
t •, ^3 3p Lc- i� 4
o � ct
4 _
THIS PLAT IS OF A SURVEY THAT CREATES..A SUBDIVISION OF � ,, c2, ,v-
LAN WITHIN 'd. -.4,V M � � � �--.------- -- -C
D HIt�-THE AREA OF A COUNTY OR MUNICIPALITY THAT: _ • .�• � ® tn_
HAS AN ORDINANCE THAT REGULATES PARCELS OF LAND. � '••.F, 040irE. r jw ,
r �'L
LAo
G ,SACK G STOCKS _ m �► d• ;;; • Q :3 � � � �'
o n Vi I.
50.00 0.00 -- t p p I(od .00 _ sew.OD
D6�? P(.Ai�1h(ING 1?fR�CTOC toX7o50aartoso
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^. ; r , .: • , .-. , , ;_,. .,,,.. s:,. I „, ..e to
NOTE • TIMBER RIDGE COURT WAS NOT CONSTRUCTED TO MINIMUM STANDARDS �. .. ,...
-. r.. k +.< t .e. iz .. .� t ;*, .5 a
A THE NORTH ARflLtNA:DEPARi'IaiENT:OE TRANSPORTATION AND ACCORDINGLY t ; ..,: : � . � �. . __.,�,,;
Vr" C �. , ..,. ...'r: h _,,...--v *:",^.-.S �s �:�,+' to t L 1 ,w t,� ;» si - ��, �e:,.� g
T ._ STATUE N NOT E ACCEPTED THE ..STATE: � ,.+T uj .1I:.. L ,
Pt�iAN TO N.C.GENERAL A E CA 0 B 7 8Y �-- ° .. x r., P� f�
• 15
MAINTENANCE, PAVEMENT, OR ANY OTHER PUBLIC IMPROVEMENT, AND }� �`,�.. ; ., . „-, � • ; _ . .. j'� � I5 U
ARE PRIVATE RESPONSIBILITY ;FOR MAINTENANCE AND UPKEEP,ALTHOUGH o' u•:{; } ...,�-r.#�°4,
FULLY OPEN TO THE PUBUC FOR TRAVEL.
-.�-:�-.-.. t ,.� � � ..;.:,, its •31��€t
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JACK Co 510CI45
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_n �. �_ UEV D 8 CEO �EVI✓t,OPM r CD D�dltGhl , �i L a f� , �1. C.
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-

DIVISION OF ENVIRONMENTAL MANAGEMENT
1
J x 4�a . 5 1 oc V.S } pus,
/0 k/ ZW F1;9EZ-X1
G Z14J1,Q!0 ?bA1 Al, (5. 2C'¢01
Subject: Project No. 88 l 2 11
SSP,C_ E-%' 3 C-'iR EE1C -P A FSE 2
"B_R 0 Mt>W KX County
Dear Sir:
The Environmental Management Commission (EMC) recently adopted
new stormwater regulations which became effective on 1 January
1988. The new rules will affect much of the development taking
place in the 20 coastal counties. Any development project
located in a coastal county that is required to submit a
Sedimentation and Erosion Control Plan to a State, County or City
review agency, must comply with the newly adopted Stormwater
Regulations.
The Division of Environmental Management has received a copy of
your Sedimentation & Erosion. Control Plan (or your Stormwater
Management Plan) for the subject project. At this time your
-submittal concerning St.or_mwate.r. Management:
Appears to be complete, and, your project will be reviewed as
soon as possible.
Is not complete. The following information is needed to
complete your submittal. Please submit the following items
within 30 days, or your project will be returned as
incomplete.
--'For projects using density limits approach. �
A site plan that clearly indicates all built -upon
areas (i.e., streets, driveways, walkways, building
footprints, etc.).
&-_� Computations showing the percent built upon areas,
both existing and planned.
L/ A copy of deed restriction(s) and restrictive
covenants which include the State as a beneficiary.
The attached submittal form should be completed for
projects using the density 'limits approach.
For projects involving an engineered Stormwater
Management System.
Plan and profile drawings of the collection and/or
disposal systems.

.+
Computations or other criteria used to support
design of the system.
Volume of runoff.
Volume of containment/disposal system.
De watering time of containment/disposal
system.
Length of vegetative filter strip needed.
Other
Supporting data concerning the hydrogeology of the
site:
Seasonal high water table.
Infiltration capacity - saturated hydraulic
conductivity.
Other
Drainage pattern(s) for design storm event, and
drainage pattern(s) for runoff in excess of design
storm event.
A complete stormwater maintenance manual including
responsible party, quantitative and qualitative
criteria which would indicate when corrective
maintenance is required, and a periodic maintenance
table as needed.
A proposed monitoring program for the system.
Other
Please be reminded that construction of the subject project may
not commence prior to approval of the Stormwater Management Plan.
We will make every attempt to assist you in any way we can. If
you have any questions, please call /%QK ,�{�at
telephone number [phone].
CC: WiRO, CF
Bill' Mills
Sincerely,
gm� Donald Safrit
��Regional Water Quality Supervisor

EROSION CONTROL PLAN
FOR
PHASE 1 JACKEYS CREEK
developed by
JACKEYS CREEK DEVELOPMENT COMPANY
Area to be disturbed: 10 acres
RECEIVED
Wilmington Regional office
fjCAA
p ECEHE
D
DEC 14 1988
D E M
pR41 # �W 17 1 1
Phase 1 of Jackeys Creek Subdivision is a proposed 70 acre tract South
of Belville, N.C. on Highway #133 as shown on the vacinity map on the erosion.
control plan.
This subdivision will control drainage through a series of grassed roadside
swales and will control erosion by berms, silt fencing, grassed swales, and
M.
temporary sediment traps.
The tract was dividind into 5 basins to calculate storm run-off into
grassed swales l.thr.0 5. The basins are labeled A thru E. Control at each
swale was determined by the attached supporting calculations. Due to the type
soil being slightly impervious, a higher run-off coeffieient was used in the
calculations.
The velocities in the swales were all to great for bare soils, so it is
imperative that all swales be vegetated before full scale construction begins.
The velocities will be adequate after vegetation is established because the rough-
ness coefficient will increase in -turn lowering the velocity plus vegetation can
withstand higher velocities.
7n other p:Laces whcl:L: Ic::c:t: f.l.aw l:un off:' w:i:.La. c,�r:cur, Iicl:nls, s:ia,L fences,
lnd buffer zones w:l.la. be. uc,c:cl. S.i.:Lt fc:nceti w:i.a.a. t)L: "L the toe cif" [:Ll..l:s
.or streets, Berne wi7.l. bc: LlSed ill Lhr top o.f: fi.a."I..s.
Also enclosed ill this p:Lan r•Irc:
I — Coils ti.tic tioll st:cll.1C?IIC:I?.
2 — Vegetation ,:Intl �c:ccl:i.ni; p:L�In
.3 — Construction onl:l:ancc•,
SCHRMULING OF WORI(: (:;Le:,Ir:i.ni; ;lncl �;I:ubll:i.n�; tlhna..l. he schc.dulecl and
erformed in such a nuannc'I: th,It: subsequcnL' gl:adill); c,1)0ratA.011 and erosion control.
acLice.s can fo.11.ocr ilinnc�cl:i.r.ltc�a.y ftc:I:. li:xc:rivclt::Lnn, blll:row, alld embanlcmcnt
pcf:ations Will be concluct•Od rsuc:h ehllt cut:: ';lief 1.':i.;l.a.::; w:i.;l..l. be completed to
innl grades in a cont:inllaus c1pc:I:;ll:i.on. A:Ll con5t:l:�lr.:t::i.on areas not ot'herwl.se
rotceted sh'il.). be p].rllltecl w:i.l:h pc:i nlr.lne�ne ve:J;c:t;lt::i.vc: COW!': :Ln ler..ordanee wi.th
7ction 21 (ssLabl.:ishi.nJ; Vef;cll�ll:i.on) cif vile 30 working
lys after conlpl.etion of nCl::i.vc: const rilction.-
T(INIMUP1 AREAS TO lil% D]:S'.L'Ul.tlil'.I:l: 0111V Him, :irr.:a,: „ „•..,�....,,... r..... .
open completion of the pl:o;jer.l s11,11. be sLrippe(I of native vegetation.
No land disturbing 4Icli.vity except strcct crossings shall be permitted in
:)ximity to a natural %4aU0I:C0LlrSC w:Cthout P. buffer Zone along the margin of the
tercourse of sufficient w:i.clt•h to confine vis:i.ba.cl sS.:Lt�Iti.on within the 25
ucent of the buffer zone nc:all:er the Land di.stur.b:Lnt; act:i.v:Lty.
The angle for gr.aclecl s:Lol.lcs ,.Ind f:il].s shc:Ia.a. bc: lie; i;I:carltcr. that the anf;].e
i.ch can be retained by vcr;ctclt:i.ve cover Ol: 0t1l0'l: ticleclualt:e erosion control
ices or structures. Slopes left t exposed will, wi til:Lrl 30 working days of
ups etian of any phase of i;r�ld:i.nf;, be planl•c:d Pr oLherwise provided with ground

0.
�rr.ri :nJ0:fa1LY;t�ir1AY AiL{;l'1C
(2)
PLACEMENT OF SEDIMENT CONTROL DEVICES: All devices (silt fences
basins, etc.,) for sediment control. shall be constructed pr 'silt
clearing and grubbing on the site, i for to beginning
The work includes tile seeding and grass:i.11g of the: denuded areas.
As soon as Practicable after f:Lnisll gl:acle;; helve been established,
all operations ill connection with grassing shall be performed. If
grading work is conlpl.eted in the Fab11, all rassinthe
September 3]:f l'l�lc:
.0, b shall be completed by
l;l:;.id:Lnt; wol:Ic :L�r couy�:L�: tt:d J.tl tile: Spring, the
shall llot be begun beforU br:uss:Lrtg
Apl::L1 .1.r �. I~lulshall.
stabilization of repaired c1l be used where required for
areas. If vegetation has not stabilized the sail
during the growth period mentioned above, jute rllcjLtillg shall
on erpded slopes, be installed
Seeds: For fa3.1 planting, the grass seed shall. be unhulled Be
With 82% pure .live seed having a tmuda Seed
with 88 %pure live seed Navin, germiliatipn of 85%, Italian Rye Grass Deed
a germination of 857, and Carpet Grass Seed with
b
80% pure live seed having
a germination of 85%, For spring planting no change
shall be made in composition except- l:hstL' the aced waaj be hulled.
Fertilizer: Fertilizer shall U� 8-8-
free flowing and suitabl • a 8 grade, uniform in composition,
g e for application with approved equipment, delivered
to the site in bags or oll•ler cortvenien.E colltainers each fully labeled
to the applicable .State fertij..izer :Laws, and bearing, � conforming
the producer. !, the name and warranty or
Lime shall be ground 1:ilUc«tone containing
carbonates and shall be not less that 85% of total
grounded to suet:
through a 100 mesh sieve fineness that at least 50% will pass
' and at least 90% will ,as.
Equi meat ne I P Orough a 20 mesli sieve,
P cessary for the proper preparation of the ground surface and .
hamdling all required materials shall be on bland, in good con for
Clearing.: Prior to gradingdition,
and ti11a
shall be cleared of all heavygc operations, the ground surface
grade stakes, and any other nate�ial�wllichsmi>l,nps, stones
roots, cable wire,
Operations.' or subsequent maintenance Ope might hinder proper grading, tillage,
1
Grading: Grades on the areas to be seeded shall be maintained ill a
and even condition, preventing the formation of depress
quions w}le true
Tillage: After the areas required to. be re water will stand.
grades show�r� on the
`1 seed .d have been' brought' to the
drawings
tile areas sllal.l be thoroughly tilled to a depth
of at least G inches by Plowing, disking, harrowing
until the condition of t11e soil is acre table to the Owner. The
approved operations
performed onlyBurin p The work shall be
g periods when beneficial results are likely to be obtained.
Application of Fertilizer: Tert�ilizer shall. be distributed unifor
a rate of 4 pounds per 100 square feet on areas indicated. to be seededmly at
shall be incorporated into the soil to a depth of at least 3 iby nches y and
harrowing, or other acceptable methods, disking,
a part of the tillage operation specifiedlklboVecorporation of fertilizer may be

(3)
tion of Lame: Immed i_ntel.y following and s:i.mul.taueousl.y with the
incorporation of the fertilizer., lime shall be distributed uniformly at a
rate of $ pounds per 100 square: feet and* shall. be incorporated into the soil
to a depth of a least 2 inches by disking, harrowing, or other acceptable
methods. The incorporation of the lime with the Fertilizer may form a part
of the tillage operations previously specified.
Leveling: Any undulrat.i,nn or irregularitiom .in I:hu surFace resulting from
tillage, fertilizing, liming or other operations 5hal.l. be Leveled out before
seeding operations are begun.
Seeding: Seeding shal..l. he in accordance with thu sending re.q►.i:irement8
shown on the plans. No seeding shall be done during Windy weather of when
the ground is wet- or otherwise non -tillable. The grass seed shall then be
covered, using a flexible toothed weeder or other suitable equipment, by stirring
the ground not deepte,: than 1./4 inch,
Compaction: Immediately -after the seed has been planted, the planted
areas shall be leveled and rolled with a cult:i.-packer. , roller, or other
approved equipment weighing 60 to 90 pounds per l.:i.nenr hoot of roller.
Watering: Immediately following seeding, when necessary to maintain growth
of grass and in any case when planting is perm:i.tLud in dry weather, pinntced
areas shall be watered. Each watering. shall be in sufficient quantites.
to obviate rapid drying out. & at ra rate of which w:i.l.l not cause erosion.
Protection: The seeded areas shall be protected against traffic or other
use by erecting barricades :immediately after seeding is completed and by
placing warning signs on the various areas.

(RIP -RAP APRONS)
S[}EC|F\/`8'T //lk]S
Z. ypz natural or vegetated channels, sec the Standard and Specifications
for Grassed Waterway,
'
%. Aprons at the end of pipe or lined channel outlets shall meet the
following criteria:
a. Bottom grade shall be 0.0l
b. Side slopes 2:1 oz flaCLez
o. Sldewallu shall cxceod up as u|`u*n on djc planu huL not less '
than two-thirds the pipe diameter,
d. There shall be ou uvmcta]-1 fro"' Lhe end Of Lhe apron to the /
surface of the rc!c�iv1o(j coa'm�1. ]1w acua Lo bc paved uc zipzappL-d
shall be undezouL so LhaL d)c invert of the apron sh'all be at the �
sa.me grade (flush) with (A -le surface of the j:cueiving channel. The !
apron shall have a cuCof[ or toe wall at the downstream end. '
e. Apron dimensions and riprap size or concrete thickness must be
as �qhown on the plans. ' |
f. The width of the end of the apron shall be eAuul to the bottom
width of the receiving ohanuuel.
g. ahe placing of fill, -c1thar loose or compacted in the receiving
channel shall noL be allowed.
h. No bends or curves in the horizontal aligmneoL of Lbo apron will
be permitted. .
. Paved channel sections shall meeL Lhe following ozi�ezia;
u. Side alopea,'dimonsinns, grades, aLo. aholl be as shown on ^
the plans.
b. There shall be no o»erfall from d'ie end of the paving to the |
surface of the receiving channel. .
C. Riprap size or oonozeLa dh1cknoss, joint det-ails, ev.o. shall be
as shown on the plans.
d. The en6 of oaved oacdons shall be as wide as the receiving `
channel and the transition between the two.ohanoela shall be .
smooth.
e. The placing of [ill, eichez loose or oumpacLod in the receiving
channel shall not be allowed.
f. Benda or curves in the horizontal alignment of paved channels
aze not acceptable mnloao shown on the plan,, and the radius of
curvature must be Lhe same as ehowo on Lhe plans. �
Ripzap construcLion shall com)�ly with 01e SLaoda1:d and Specifications
for Riyra1). '
�
(REF, - GUIDE FOR SEDIMENT CONTROL ON CONSI8UCIION SITES IN N. C,)
.`::,� /,

Exa.stin k1.
cro�.-,d sr.;lr
ns_
,... ,• .7 ., . i r .t.
Consc uction Sp-ecirications
I
1.
Stone size - Use ' Sli:: sd-ze
Na. 2 (2--1/2" to
1") or A Sk.':0 des:.gn.at�on
size
No. 2 (2-1; 2" to
crushed
store.
2.
T.arl C 1 -
As + IFC.'ce, bu;:
not: 3.t, • char. 50
fe.et•
�.
N' ..•
�(iL' i_!°ri _i; ii «.
11 70
S �.: InC-LSS CI ET-rRSS.
25:._:l;•
- L;fli'.:i ('IC(.Sa?\',
WI1C(:1i �;.......... be CI
BC:^.c': C•�? re-moveSEG� .i:i.
• - - �.. ..:,
l..... : i'.... _ .. ........ ;1 ilv
r
._ L .S •:. L:
G J :'. al .. _ L!I
Ct i.iS.I.ec: 1: «.... rS
wr�c �:.
!:•... i:c; _ c. yen_
rat? o: se, le:i. bas
.... :..,. s( ir.7 i. shc1�
be
an;,' s orui d_01;:1,
cs'i:r_;;, or ',:-r ot::_e
,hrough
use of sand bass,
gravel, boa,. Lis o;:
ot'rlc.'. a}:arc•ved ;ae[Inods.
6.
)ln4-nce:..:i..:L
- he anCrc'snce
sl1:!.1. be i6d:..nr-aln✓:d
q-n a conuiCion which w Zl
iT1Y
OI Se✓i ..11. iC onco
public- r J-'C,. -C'_-s<ix;:
i `i:. ri :2c:,
rer;u__.•(: (:_.. :x!�c
zo .i r.'(. ��, ��....
addi .ional swone as co^.• -
,,
_is:.:
di _..ons
de.m-m;:1 ..:aa:.t:
cQic/cjr c i-,ancuc o:
any .o tra.
s e.. _.:pC:.. _.
.....! _.. :aii:.'. t:.. �1.�:.
�. CC., CI I: (; i��)+i!C!, .•�;;
�:...... U: .._.. �)::..• Q: .. puol__
: 1ci-.:5...�?
.�'r:. ��..:!• t: .;i.� •�.�;;i0:'i':.
�.I';:11(:(..1 i aCL•' -

H (FT.)
500
_
400
300
F X AM P L IE
Height = IOO F I,
t-
200
Lenglh=3,000Ft.
W-�
-
Time of concenlrolion =l4Min.
1—
150
°
'- too
L (F1'.)
u
10,000
_
C
50
~
40
_
J
5,000
0
30
W
�Q
Q
n°.
3,000
cr
H
20
Note:
z
Use nomograph Tc for natural
— 2,000
W
basins with well defined channels,
o
=
Z
a
for overland flow on born
= I,5Oo
0
ear th,and mowed grass road-
fs-
U
u7
-- 10
.for
side channels.
ca
1000
U.
°
g-
For overland flow, grassed sur-
w
_
o
_
faces, multiply Tc by 2.
�
5
For overland flow, concrete or
— 500
x
4
asphalt surfaces, rrtultiply Tc
0
by 0.4. ,.
X
300
T
3
For concrete channels, multiply
-
Tc by 0.2.
200
2
150
I
100
Qosed on study by P. Z. Kirpich, '
Civil Engineering, Vol.10, No.6, Juno 1940, p. 362
FIGURE I
i=-Land Quality
/29/86 wn
Tc (MIN.)
r200
E_ 15 0
100
80
S0
50
40
30
2.5
20
15-
10
8
6
5
4
3
2

L 1, 1 N 1"E'N S [T V Ff,": I: N, %C y
I
k'ji- Imi lig Loll I IN, - c
i "1 7 D
10 vr,
5 yr
2 vri
_ � 1 I
10 20 30 50 60
i 0 x
T-2. 5
FILE NO, 2-1-324(

3
.711 ac{es
13
(4 (4.3) -
dot_L
l o�- SA'
6VA
x
_ 4-T
\%.5 x _1 K I xI .A'g/3
3 W.SA .604 .1 q 1.
l . d -c $ -1 = 1 .410 -Z-5—
3 (1.6zs) q P s
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