20070654 Ver 1_Application_20070411

~~~~1, Associates, P.A. ~ ~}
- - - C wi,L ~n~p%vueer%v~ r
Municipal • Industrial • Commercial • Residential
CONSULTING ENGINEERS:
WATER 8~ WASTEWATER • STRUCTURAL • GEOTECHNICAL • TRANSPORTATION
WATER RESOURCES 8~ STORMWATER • LAND PLANNING & DEVELOPMENT
CONSTRUCTION MANAGEMENT & ADMINISTRATION • BUILDING DESIGN
462 W Palmer Street Franklin, North Carolina 28734 Tel.: [phone]
Apri14, 2007
Mr. Alan Klimek, P.E., Director
NCDENR-Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
RE: Wisperwood Village Parcel
Road Stream Crossing
Nationwide Permit No. 14 Request
Dear Mr. Klimek:
On behalf of John Earl Sanders, please fmd attached an application for a Nationwide No. 14
Permit.
The work generally includes installation of road crossings in two locations as follows:
• 30 linear feet of 36" diameter corrugated metal pipe
Erosion control measures shall be installed as needed to minimize local and downstream impacts
such as silting and other turbidity impacts.
Please feel free to contact me if you have any questions.
Sincerely,
/~/
Larry A. Lackey, Jr., P.E.
cc.: Owen Anderson (NCWRC)
Scott McClendon (USACOE)
File
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~ PR I ~ 200%
~ 11~ ~s7~14,~yy,~°'r'°s 9R~Ct#

2 0 0 7 0 6 5 4
Office Use Only: Form Version May 2002
.. ..~.n, ..,_ .....,
USAGE Action ID No. DWQ No.
fir any par[tcuiar stein is not app~tcabte to this project, please-enter "Not Applicable" or "N/A".)
I. Processing
1. Check all of the approval(s) requested for this project:
® Section 404 Permit ^ Riparian or Watershed Buffer Rules
^ Section 10 Permit ^ Isolated Wetland Permit from DWQ
^ 401 Water Quality Certification
2. Nationwide, Regional or General Permit Number(s) Requested:_ 14
3. I~this notification is solely a courtesy copy because written approval for the 401 Certification
is,, not required, check here: ^
i
4. I~.payment into the North Carolina Wetlands Restoration Program (NCWRP) is proposed for
mitigation of impacts (verify availability with NCWRP prior to submittal of PCN), complete
s~ction VIII and check here: ^
5. If your project is located in any of North Carolina's twenty coastal counties (listed on page
4), and the project is within a North Carolina Division of Coastal Management Area of
Environmental Concern (see the top. of page 2 for further details), check hen:
II. Applicant Information iGf ~°°~ ~`~ ~ ~m~ 1~~' c~~
--
A;'Ft ~. ~ Z0~~7
1. Owner/Applicant Information w _
Name: John Earl Sanders r7Er~~ - W~vaT R ~:~~~~.~ ~ ~`
Mailing Address: 622 Brendle :Road °' ' ~ ~" ~~
Franklin. NC 28734 _. _--_ _ -
Telephone Number: 828-524-2023. __ Fax Number:_ 524-3076 _
E-mail Address:
2. Agent/Consultant Information (A signed and dated copy of the Agent Authorization letter
must be attached if the Agent has signatory authority for the owner/applicant.)
Name:
Company Affiliation: __
Mailing Address:
Telephone Number:
E-mail Address:
Fax Number:
l'nLe 5 of 12

III. Project Information '
.ww:... .. ....~ ~.. _.
Attach a vicinity map clearly showing the location of the property with respect to local
landmarks such as towns, rivers, and.. roads. -Also provide a detailed site plan showing, propert}~
boundaries and development plans in relation to surrounding properties. Both the 'vici1ki~ty map
and site plan rriust include a scale and north arrov,%. ` 'The specific footprints `o~'~lY'hiiplclrigs;' ~~~
impervious surfaces, or other facilities must be included. If possible, the maps and plans should
include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property
boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion,
so long as the property is clearly defined. For administrative and distribution purposes, the
USACE requires information to be submitted on sheets no larger than 11 by 17-inch format;
however, DWQ may accept paperwork of,,;any size. DWQ prefers full-size construction
drawings rather than a sequential sheet version of the full-size plans. If full-size plans are
reduced to a small scale such that the final version is illegible, the applicant v~rill be informed that
the project has been placed on hold until decipherable maps are provided.
1. Name of project: Wisperwood Village
2. T.I.P. Project Number or State Project Number (NCDOT Only):
3. Property Identification Number (Tax PIN):__ 0222904, 0222825, 0222826
4. Location County: Macon Nearest Tovv~i: Franklin
Subdivision name (include phaseLlot number): Wispenvood Village _
Directions to site (include road numbers, landmarks, etc.): Take Hwy 64 North to
past. Buck Mountain Estates.
5. Site coordinates, if available (UTNI or Lat/Long): Lat 35°14'40" / Long 83°21'10"
(Note - If project is linear, such as a road or utility line, attach a sheet that separately lists the
coordinates for each crossing of a'distinct waterbody.)
6. Property size (acres): 4.5 acres- '' _ _ ..._.~
7. Nearest body of water (stream river/sound/ocean/lake): Little Tennessee River
8. River Basin: Little Tennessee
(Note -this must be one of North Carolina's seventeen designated major river basins. Tlie
River Basin map is available at http://h2o.enr.state.nc.us/admiu/maps/.)
9. Describe the existing conditions on the site and general land use in the vicinity of the project
at the time of this application: Site is forested hill~eas in a residential community.
Page 6 of 12

10. Describe the overall project in detail; including the type of equipment to be used:
A road crossing is to be installed across an existing unnamed creek. The crossing 11 be
accomplished with a 36-inch diameter CMP. Installation shall be by open cut method using a
track excavator.
11. Explain the purpose of the proposed work:
The purpose is to rovide main road access a residential community.
IV. Prior Project History
If jurisdictional determinations and%or permits have been requested and/or obtained for this
project (including all prior phases of the same subdivision) in the past, please explain. Include
the I~SACE Action ID Number, DWQ Project Number, application date, and date permits and
certifications were issued or withdrawn. Provide photocopies of previously issued permits,
certif cations or other useful information. Describe previously. approved wetland, stream and
buffeir impacts, along with associated mitigation (where applicable). If this is a NCDOT project,
list and describe permits issued for; prior segments. of the same T.LP. project, along with
construction schedules.
N/A a
V. Future Project Plans
Are any future permit requests anticipated for this project? If so, describe the anticipated work,
and provide justification for the exclusion. of this work from. the current application.
N/A ,
VI. Proposed Impacts to Waters of the~United Sfates/Waters of the State
It is the applicant's (or agent's) responsibility to determine, delineate and snap all impacts to
wetlands, open water, and stream channels associated with the project. The applicant must also
provide justification for these impacts in Section VII below. All proposed impacts, permanent
and temporary, must be listed herein; and. must be clearly identifiable on an accompanying site
plan. All wetlands and waters, and all streams (intermittent and perennial) must be shown on a
delineation map, whether or not impacts are proposed to these systems. Wetland and stream
evaluation and delineation forms should be included as appropriate. Photographs may be
included at the applicant's discretion. If this proposed impact is strictly for wetland or stream
mitigation, list and describe the impact in Section VIII below. If additional space is needed for
listing or description, please attach a separate sheet.
1. Provide a written description of the proposed impacts:
Install 30 linear feet of 36" CMP in streambed.
,Page 7 of 12

_ ,. _ a ~. _ d.~d ;,d• ~.
2. Individually list wetland impacts,pelow: ,N/A
n, tiG
Wetland Impact
Site Number
(indicate on ma)
Type of Impact* Area of
Impact
acres Located within
,100-year Floodplain**
(es/no Distance to
Nearest Stream
linear feet
Type of Wetland's**

List each impact separately and identify temporary impacts. impacts include, but are aot limited to: n:echan~zea cieanrg, grading, ti;i,
excavation, flooding, ditching/drainage, etc. For dams, separately list impacts due to both structure and flooding.
** 100-Year floodplains aze identified through the Federal Emergency Management Agency's (FE)ulA) Flood Insurance Rate Maps
(FIRM), or FEMA-approved local floodplain maps. Maps are available through the FEMA Map Service Center at 1-800-358-9616, or
online at http://www.fema.gov.
*** List a wetland type that best describes wetland to be impacted (e.g., freshwater/saltwater marsh, forested wetland, beaver pond,
Carolina Bay, bog, etc.) Indicate if wetland is isolated (determination of isolation to be made by USACE only).
List the total acreage (estimated) of all existing wetlands on the property: N/A
Total area of wetland impact proposed:
3. Individually list all intermittent and perennial stream impacts below:
Stream Impact
Site Number
indicate on ma
Type of Impact* Length of '
Impact
(linear feet}'
Stream Name** Average Width
of Stream
Before Im act Ferennial or
Intermittent?
leases eci _L
1 Road crossing 30 unnamed 3'+;- Perennial

__._.
a

* List each impact separately and identity temporary impacts. Impacts include, but are not limited to: culverts and associated rip-rap,
dams (separately list impacts due to both structure and flooding), relocation (include linear feet before and after, and net loss/gain),
stabilization activities (cement wall, rip-rap, crib wall, gabions, etc.), excavation, ditching/straightening, eta If stream relocation is
proposed, plans and profiles showing the linear footprint for both the original and relocated streams must be included.
** Stream names can be found on USGS topographic maps. If a stream has no name, list as UT (unnamed tributary) to the ~icarest
downstream named stream into which it flows. USGS maps are available through the USGS at 1-800-358-9616, or online at
www.usas.QOV. Several Internet sites also allow direct download and printing of USC•S maps (e.g., ww~;~r.topozone,com,
www.map~c uest.cgm, etc.).
Cumulative impacts (linear distance in feet) to all streams on site: 30
Page 8 of 12

.;
NiY. . ~~:, ....
4. Individually list all open water impacts(including lakes, ponds, estuaries, sounds, Atlantic
Ocean and any other water of the, U.S,~*below: N/A
"~
,. ,~~,}
Open Water Impact

Site Number

indicate on ma)
*
Type of Impact Area of

Impact

(acres
Name of Waterbody

(if applicable) Type of Waterbody

(lake, pond, estuary, sound,

ba ,ocean, etc.

List each impact separately and identity temporary impacts. Impacts include, but are not limited to: till, excavation, dredging,
flooding, drainage, bulkheads, etc.
5. Pond Creation
If construction of a pond is proposed,' associated wetland -and stream impacts should be
included above in the wetland and stream impact sections. Also, the proposed pond should
be described here and illustrated on any maps included with this application..
Pond to be created in (check all that apply): ^ uplands ^ stream ^ wetlands
Describe the method of construction (e.g., dam/embatikment, excavation, installation of
draw-down valve or spillway, etc.):
Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond,
local stormwater requirement, etc.):
Size of watershed draining to pond: Expected pond surface area:
VII. Impact Justification (Avoidance and Minimization)
Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide
information related to site constraints such as topography, building ordinances, accessibility, and
financial viability of the project. The applicant may attach drawings of alternative, lower-impact
site layouts, and explain why these design options were not feasible. Also discuss how impacts
were minimized once the desired site plan was developed. If applicable, discuss construction
techniques to be followed during construction to reduce impacts.
Road crossing shall be installed to provide access to the site.
VIII. Mitigation
DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC
Division of Water Quality for projects involving greater than or equal to one acre of impacts to
freshwater wetlands or greater than ' or equal to 150 'linear feet of total impacts to perennial
streams.
USAGE - In accordance with the Final Notice of Issuance and Modification of Nationwide
Permits, published in the Federal Register on March 9, 2000, mitigation will be required when
necessary to ensure that adverse .effects to the aquatic environment are minimal. Factors
Page 9 of 12

including size and type of proposed impact' and function and relative value of the impacted
,_ aquatic resource will be considered in,,,determining acceptability of appropriate and practicable
mitigation as proposed. Examples of mitigation that may be appropriate and practicable include,
but are not limited to: reducing the size of the project; establishing and maintaining wetland
~ '' and/or,upland vegetated buffers to protect open waters such as streams; and replacing losses of
,,~~3N •y.,`. , •~~~>w,' aquatic'° rest~ttre~~~nctibns`and; ~~alues': by creating, restoring; enhancing, br,~~es~ruln'g~s'~~i~i~l~r ~~ ".~ .
functions and values, preferable in the same watershed. 4
..
If mitigation is required for this project, a copy of the mitigation plan must be attached in order
for USACE or DWQ to consider the application complete for processing. Any application
lacking a required mitigation plan or NCWRP concurrence shall be placed on hold as
incomplete. An applicant may also chooseto review the current guidelines for stream restoration
in DWQ's Draft Technical Guide for' Strum Work in North Carolina, available at
http://h2o. enr.state.nc.us/ncwetlands/strni~ide.html.
1. Provide a brief description of the proposed mitigation plan. The description should provide
as much information as possible, including, but not limited to: site location (attach directions
and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear. feet)
of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view,
preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a
description of the current site conditions-and proposed method of construction. Please attach
a separate sheet if more space is needed.
N/A _ _
„,
2. Mitigation may also be made by' payment into the North Carolina Wetlands Restoration
Program (NCWRP). Please note it is the applicant's responsibility to contact the-NCWRP at
(91!9) 733-5208 to determine availability and to request written approval of mitigation prior
to Submittal of a PCN. For additional information regarding the application process for the
NCWRP, check the NCWRP website at http://h2o.enr.state.nc.us/wrp/index.htm. If use of
the NCWRP is proposed, please check the appropriate box on page three and provide the
following information:
Amount of stream mitigation requested (linear feet): N/A
Amount of buffer mitigation requested (square feet):
Amount of Riparian wetland mitigation requested (acres):
Amount of Non-riparian wetland mitigation requested (acres): _
Amount of Coastal wetland mitigation requested (acres):
Page 10 of 12

IX. Environmental Documentation (required ~by DWQ) ~"
~~ Does the project involve an expenditure of public (federal/state) funds or the use of public
(federal/state) land?
Yes ^ No
,.,a . ~.
If yes, does the project require preparation of an environmental document pursuant to the
requirements of the National or North Carolina Environmental Policy Art (NEPA/SEPA)?
Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA
coordinator at [phone] to review current thresholds for environmental documentation.
Yes ^ No ^
If yes, has the document review been' finalized by the State Clearinghouse? If so, please attach a
copy of the NEPA or SEPA final approval Letter.
Yes ^ No ^
X. Proposed Impacts on Riparian and'Watershed Buffers (required by DWQ)
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
required state and local buffers associated with. the project. The applicant must also provide
justification for these impacts in Section VII above. All proposed impacts must be listed herein,
and rrtust be clearly identifiable on the accompanying site plan. All buffers must be shown on a
map, 'whether or not impacts are proposed to the buffers.. Correspondence from the DWQ
Regional Office may be included as appropriate. Photographs may also be included at the
applicant's discretion.
.Will .the project impact protected riparian buffers identified within 15A NCAC 2B .0233
(Meuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 2B .0250 (Randleman Rules and
Water Supply Buffer Requirements), or other (please identify )?
Yes ^ No ® If you answered "yes", provide the following information:
Identify the square feet and acreage of impact to each zone of the riparian buffers. If buffer
mitigation is required calculate the required ..amount of mitigation by applying the buffer
multipliers.
Zone* Impact
s uare feet) Multiplier Required
Miti ation
1 3
2 _ 1.5
Total
- cone i extenas out su teet perpenmcWar trom near bank oT channel; Lone 2 extends au
additiona120 feet from the edge of Zone 1.
Page 11 of 12

Payment into the Riparian Buffer Restorati'bn Ftahd). Please attach all appropriate information as
_ identif ed within 15A NCAC 2B .0242,~.ox .0260...,
N/A
XI. Stormwater (required by DWQ)
Describe impervious acreage (both existing and proposed) versus total acreage on the site.
Discuss stormwater controls proposed in order to protect surface waters and wetlands
downstream from the property.
Temporary Erosion & Sediment Control Measures to be installed in area of construction. _
(Refer to attached drawing). Disturbed areas to be seeded.
XII. Sewage Disposal (required by DWQ)
Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of
wastewater generated from the proposed project, or available capacity of the subject facility.
XIIL Violations (required by DWQ)
Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer Rules?
Yes ^ No
Is this. anafter-the-fact permit application?
~Yes^ No~
XIV. Other Circumstances (Optional):
It is the 'applicant's responsibility to submit the application sufficiently in advance of desired
construction dates to allow processing time for these permits. However, an applicant may
choose to list constraints associated with construction or sequencing that may impose limits ou
work schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and
Threatened Species, accessibility problems, or other issues outside of the applicant's control).
;.Applicant/Agent's Signature; Date
(Agent's signature is valid only if an authorization letter from the applicant is provided.)
Page 12 of 12

,~
n. «.
UNITED STATES
DEPARTMENT OF THE INTERIOR
GEOLOGICAL SURVEY

,~ t~ .
5so 000

~_ ~~~ Associates, ~'.~~.
_,;,, ~ ev'~.vtc
,.,.,:
~~ ~ Municipal e Industrial • Corznrercicrl • Residential
... ~ v~
r ~',~ CONSULTING ENGINEERS:
WATER 8~ WASTEWATER e STRUCTU!?AL ~ VEOTECHNICAL + TRANSPORTATION
'WATER RESOURCES ~ STORMNIATER ~' LAND PLANNING ~ DEVELOPMENT
CONSTRUCTION MAt~IAGEMENT & ADMINISTRATION c BUILDING DESIGN
462 W Palmer Street Franklin, North Carolina 28734 Tel.: [phone]
Wisperwood ~~ilage
IVlacon County, I~TTC
~y~o~
Larry A. Lackey, .fr., P.E.
NC PE #23963

TIME OF CONCENTRATION AND TRAVEL, TIME Version 2.00
Project FIISPERWOOD VILLAGE User: LAL Date:
County MACON State: NC Checked.: Date: _ _
Subtitle:
- Flow Type 2 year hength Slope Surface n Area Wp Velocity Time
rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr)

~ Sheet 3.02
~~#
~' ~' Shallow Concent'd 300

93 .31 I

.43 U 0.516

0.002
Time of Concentrat=ion = 0.52*

Subarea #2 - C2
Flow Type 2 year Length Slope Surface n Area Wp Velocity Time
rain (ft) (ft/ft) rode (sq/ft) (ft) (ft/sec) (hr)
Sheet 3.02 294 .41 I 0.454
Time of Concentration = 0.45*
~-l m i rt ,
Subarea #3 - C3
Flow Type 2 year Ler_gtn Slop•a Surface n Area Wp Velocity Time
rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr)
----------
Sheet ---------
3.02 ---------
150 --------
.43 --------
I ------------- -------- ---------------
0.2.60
Time of Concentration = U.26*

----------------------------- --- Suba rea #4 -• C4 --------- ------•-- ------
Flow Type 2 year Length Slope, Surface n Area Wp Velocity Timc
rain (ft) (ft/ft) code (sq/~t) (ft) (ft/sec) (iir)
Sheet 3.02 105 .3a I 0.205
Time of Concent ration = 0.21*

----------- --------- ---------- --- Siaba r.~a 4k5 - C5 --------- -------- --------------!-
Flow Type 2 year Length Slope Surface n Area Wp Velocity Time
rain (ft) (ft/ft) code (sq/it) (ft) (ft/sec) (hr)
Sheet 3.02 24 .42 I 0.061
Time :.f Concent ration = 0.06*
3,(~ m~~.
`T'IME OF
Project WISPERWOOD VILLAGE
Count=y MACON
Subtitle:
--- Sheet Flow Sur.fa~
A Smooth Surface
B Fallow (No Res.)
C Cultivated < 20 % Res.
D Culticrated > 20 % Res.
E Grass-Range, Short
C.ONC~?,NTRA'I'ION AND TRAVEL, TIME Version 2.OC
User: LAL Date:
State: NC Checked: Uate:
~e Codes ---
P' Grass, Dense --- Shallow Concentrated ---
Grass, Burmuda --- Surface Codes ---
H Woods, Licht P Pavad
I Woods, Dense U Unpaved
J Range, Natural

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Q
a T

} •~ ~~~I
,. _, ,I li a ~ I ~ I,.
Outlet W = Oo + La 9 !r~ `I }` ~ ~ '{ 'I ''~
PIPe ~, ~ .,., ~ ~; ~~~~~I~'j ~l' ~ 1 ~ f iii ~ {~'Ip
{• t ~~I~ ~~ 11(
w diameter (~)_ ~, i : f ~ ~ , ~ '~ ~ ~ ; ~i
- i lwater z 0.50fl f ; . ~ ~ ~ 411 i ll;! 'rte I {+.
i lI~ .+ ~ ~l II~~ Il~~r~ ,f
p.4 r~ l ~;kr~ l ~~~ (i, _ I t + ~ I ~11 Ij~~l~{~ ,, ~ ~11~~+~
~» ` u I ~ I
Q r} t i I i l ~ i~t l ffi I ~~ ~ t ~ I l ~~' ~I i+~ ~~ { ~ l
~i~` I ' lil ~I t~~ ~}Irl~ III ' +lf }•J.II' I':+,~ }^ ~ly
~\1~~ ~ ~t~fl ~t I.i 1!I~I ~~ tl j I~~ III ~ ` rr. ~ f Flhllll{+1 +~i~~.i;~~ ~ +~:I
\v`C '+f ~ ~ ~ I ~ iii I' 'I f~i ~III~ I il'I'i i t~ ~ ij nll ~1 -.1 }~ t I~~~. i
~r ~fl~lf~l IiI I I I, ~~r r + ~~i i Fig ! I~ 1 ~~i
a ~ _r -}1-Tt -f~rtt""--1 I `~ ~ ;Yl t ~ ~ ~i , i a ~ , ~ ~}{~+~~t~ ~~ ~1 I ~ 1~ ,,I 4
I~ir, I- ~ ttI i}li 11. If I f~f~ ~ h ! If11 ~ I ~'• .{~.-~~ ~ +.t.Y ~I } Ii '~ I 1 a I
li}' f~i~ I + ~`ta1 t~{I ~lil~lf ~'I ~~{ fi11lAa ~ I~~ l i it 1 ~} l• i 1} 1~~ I')
~ `.'~il~ i i~ - '!-, },{ ~~l{~~~~ - ~ .ice F_il~l~.I k4~{ }{I' I ~ {~'
t , 'll . 1 .~ t 1~ ~ '
I ~ ~~ '~ 1 + fl _ 2 _ ly it{il,l I~ I = ~ - ~_I J ~+~_f ~+ ~tl' ~ r~'
iu i ~ ~ I
}j , 111
'~. ; ~ t} +' f ~If ~III~~I~~, } jr I it _~ ~' r(`1- t~ ~i: ~ ,I 'o ~~ ~~
10 } ~~~ 1~4 ~1~1 I j + ~ I I _ ~ F- 1EL I,~ ~~ D .i
1 ~ ji_ ~ ~if~~ ICI '~i~~'~ 'i j41- ~~il ~~~_ ' i.- 111-' ~ '~ ~i)
I ~ Ii - E' I~ ,~~ t~~~ l~flfl~ ~ ~ 1 ~ I -~ ~- ~,.~+} I "
llr h
I -j, t.. r 4 L ff _ Q d
I ~ki j~l ~t { ~- ~~- ~r ;ICI ~} lfilf~!II#~i r} ~~~ti~ a--- ~~ a
1: 1 I i ~~, ~ i I I ~I t , ,+ ~n
I ~ ~ 1 i l i .I '' 15 d ~.ii I.. i, i i ~-. ~ j'.I. 1 ~ 1 ~G
i ~I I~ I C
~I j:4 i I~ ~Ii iii I• 2 d ti ~; ~ I , ~
~ i ~ r f
'~ I i ~~ ~ I I ~ ~~. i '! ~! f I i':; ;'~i'~ ;~I ~ ;~;:
,,iLu. _ U
3 5 10 2U 50 100 200 500 1000
I;~ Discharge (i~t3lsec)
Curves may not be extrar~alated.
Figure 8.06a Design o' outlet protection protection from a round pipe fiowiny fuC, minirwm tx-~iiwater condition (Tw < U.,~i dic;meter).
CULVERT Q do dso La 1~N ~

1
3.88_
-- _
- 36" _
.6 7"
9.0 108" __
_
12.0 144" --~
-- 2

-- 0.86_

- __ 15"
- -
o - - _25 3"
- ~1,?_515"Z__ 2.5 30''~ _
t------
~
3
_ _ U.67
-~ ~
_1S __
--- ~~
.25 (3) _ -~ r, r~
1.~5 ]_~ i
-- ..
?.'S (30 %
_I
4
5 _ 1.65
_ 0.16 15"
~_ 15" ---1 .25 3"
.2~3") -~ 1.25 "15"
-
_ ]..2 ~~ ~ `?'~_ _
t---:?.5 30"~' ~
~ 2.5 X30"") --I

.M-. F,1~ I ~I
~;
' I
I
Diame
'
-
(-'
I 12~~

~,,.-
'% 12"
~-----
_ 18~~
~
i --18..
r----_-
i ---__-

24"
~~~_ 24..
Chart 1
Summary of Laboratory Friction Measurements for
12", 18" end 24" Helical. CMP for Full Flow Conditions
~- ---------Laboratory l"esting-------------
_e-_.--._...._-. ~_ ,.._-. -..--_.._- _.--.--._---_ 1
Manrting's Velocity' I `Jelocity
:er f "n" Value ~ in fps
I
I ,: f
0.0122• ~ 14.9
j 0.0192* 0.5
----- - -- I--___-.:_ 0.0152* ---- I - ------14.0
* - --- ; --
- ~- --- ---- 0.0168 j 0.9
------ r-----
j 0.0166* ----- --------- 12. ~.
-- ----- - i -----0.0221 * - - I ---- 0.6
*Note: Recommended Manning's "n" value of 0.024 be used rather than tine F~elical
values shown above.
CONCLUSION
In order for the reduced "n" values to be applicable, all of the following factors must be met:
1. Full flow conditions.
2. Clear water flow (nc debris er bedloads;
3. Circular shape after installation
4. No manholes, junction structures or binds, must be straight sections.
5. Non-paved invert.
6. Pipe ends are not recorrugated.
Storm drain systems are constructed with manholes or junction structures and do not reflect
the conditions used in the laboratory. Also, storm drains do not always operate under full flow
conditions, therefore, it is recommended a "n" value of 0.024 for corrugated metal
pipes be used.

Riprap Mean Diameter, ift)
0 O.aO 1.00 1.a0 '-2.00 2 60
b
4
4
U 3
4)
3
0) 2
c~
L 2
v
~_
0 ~s
~o
h
0
°
a -
Channel
0 ---

.
-----
---
Slope, S
-
o
O
---- --
- -

--- --
b
O
--- -
,.~

ry- - ry ..
q t1
.-~
--~

_
I
-___
- --

b ry
4 q'
---L- _ r
-

i
U q
q•

-'--
~

-- -- ----- {
--------- 1
----- --
- -
- --- -, -
--- -

-
f -- - ----- ..---- ------
--- i
-- -- ~~
-
- ---

I
- ,..
~--

- ~
--- - - a
0
G
i
r
Figure 8.05j Steep slope riprap design, B = 2, Z = 3.

~•~.+ ~.ou V./O
i.uu 7.Y6 1.60
Depth, d(ft)
ao
40
90
33 ~ ~f ~ ~ ~ ._ ~.
C)
30 pJj
JJ
CD
sa p
=~.
zo ~"'
c~
a
0
~ D ITC 1 i
1 _ `'4__
_3.88 _ ~ ~ Q ~ ~~
5.2 % _ d 50
5" t,1 n ---
4„ ~
_

N
d
a
0
m
M
z c
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d ~
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t
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c
a, ~.,uoi~~::
p
p~,~°~c o 0 0 0
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0
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0
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:,
w
w
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p, M c °•-•
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°' v ' ~;
rs
r r ,: '
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~ ch ~ ~ ~
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;,
~ t ! is 0 0 0 0
LL. V -'. 11
~~

a c~
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¢
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