20071631 Ver 1_Application_20070924

L7617
PIN 10060
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September 21, 2007
Mr. Steve Chapin
Asheville Regulatory Field Office
US Army Corps of Engineers
151 Patton Avenue
Asheville, NC 28801-5006
Dear Mr. Chapin:
071631
Enclosed is a 404 Permit application for the rehabilitation of Big Pine Creek Bridge
No. 7, located in North Carolina at Milepost 225 on the Blue Ridge Parkway. The
project consists of cleaning, painting of all steel and other surfaces; repairing
deteriorated and damaged expansion joints, and repairing and cleaning of drain
chases, as well as placement of Class 3 riprap at Pier #3 footings. Also enclosed are
project specifications, drawings and photo for your use.
If you have any questions or need additional information concerning this project,
please give me a call at 828/271-4779 ext. 219 or if you can't reach me you can call
Larry Hultquist, Project Manager at 828/271-4779 ext. 247.
After you have reviewed the proposed work and make a determination on the
permit, please copy me on any correspondence to the park relating to this project.
Thank you for your assistance in this matter.
Sincerely,
SUZETTE MOLLING
Suzette Molling
Environmental Protection Specialist
Enclosure
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cc: Ron Linville, NC Wildlife Resource Commission (w/enclosure)
NC Division of Water Quality (7 copies w/enclosure)
Thomas Shifflett, FHWA (w/enclosure)
Larry Hultquist, DSC (w/enclosure)
Al Hollister, DSC (w/enclosure)
Bob Cherry, BLRI (w/enclosure)
Lillian McElrath, BLRI (w/enclosure)
Mike Molling, BLRI (w/o enclosure)
Ray Shaw, BLRI (w/o enclosure)

Office Use Only: Form
2 O Q 7 .~ ~e~io~May 2002
USACE Action ID No. DWQ No.
~~~ any panicuiar Diem ~s not appuca~te to mss project, please enter "Not Applicable" or "N/A".)
II. 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:
3. If this notification is solely a courtesy copy because written approval for the 401 Certification
is not required, check here: ^
4. If 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
section 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 here: ^
III. Applicant Information

1. Owner/Applicant Information p, jl
Name: Phil Francis, Superintendent, Blue Ridge Parkway S ~ F : .`LU07 ~.~
Contact: Suzette Moiling (828/271-4779 x2191
Mailin Address: 1.99 Hem hill Knob Road. Asheville. NC 28803 `'`'''~~ - `"~~,~i fi~ cau,~~;7-~~
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Telephone Number: 828/271-4779 Fax Number: 828/271-4119
E-mail Address: suzette moiling cr,nps.gov
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: N/A
Company Affiliation:
Mailing Address:
Telephone Number: Fax Number:
E-mail Address:

III. Project Information
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Location Map
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The proposed project consists of rehabilitation of the Big Pine Creek Bridge No. 7. This bridge is
located in North Carolina approximately 5 miles north of the intersection with US 21 at Milepost
225 on the Blue Ridge Parkway. The project consists of cleaning, painting of all steel and other
surfaces; repairing deteriorated and damaged expansion joints, and repairing and cleaning of
drain chases, as well as placement of Class 3 riprap at Pier #3 footings as shown in attached
plans.
1. Name of project: Proiect PRA-BLRI 2A14 ~ Repair and Rehabilitation of Big Pine Creek
Bridge No. 7 on the Blue Ridge Parkway at MP 225 (PIN 10060),
2. T.I.P. Project Number or State Project Number (NCDOT Only): N/A
3. Property Identification Number (Tax PIN): N/A
4. Location: County: Alleghany Nearest Town: Laurel Springs
Subdivision name (include phase/lot number): N/A
Directions to site (include road numbers, landmarks, etc.): Located at MP 225 on the Blue
Ridge Parkway. From Asheville take I-40 East to I-77 North to SR 21 Going towards
Sparta, exit on to the Blue Ridge Parkway off of SR 21 Turn south at entrance ramp and
travel to MP 225.
5. Site coordinates, if available (UTM or Lat/Long): Latitude 36.4851 °/Longitude 80.9778°
(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): 0.06 acres estimated to be disturbed.
7. Nearest body of water (stream river/sound/ocean/lake): Big Pine Creek
8. River Basin: N/A
(Note -this must be one of North Carolina's seventeen designated major river basins. The
River Basin map is available at ham://h2o.enr.state.nc.us/admin/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: This bridge is one of several which carry the Parkway over
Big Pine Creek. The structure consists of five spans and has an overall length of 237 feet
The total deck width is 27.2 feet. The deck is supported on a steel frame structure with steel
intermediate viers resting on concrete pedestals Abutments and intermediate piers are
reported to be founded on spread footings bearing on rock or other competent material
Currently, this bridge has a structural soundness condition rating of "C" as determined by
FHWA inspection. This is defined as having moderate deficiencies including being
functionally obsolete or requiring high maintenance The immediate area surrounding the
location for ri ra is a wooded riverbank.
10. Describe the overall project in detail, including the type of equipment to be used: This~roject
consists of the repair of ioints sandblast removal of existing_paint on the bridge and painting
of the bridge as well as placing riprap Class 3 around pier #3 footing as shown in
4

attachment. The total area of disturbance for the site is approximately 0.06 acres. Receivi~
waters for runoff is the Big Pine Creek and local wetlands. Sandblast removal of paint on the
bridge shall include complete containment protection to prevent contamination of the stream
course. A small track backhoe would place riprap, which can be done completely from the
stream bank without entering the stream course. NOTE: Removing stream course woody
debris IS NOT an official bid item for this project because it was not eligible for FLHP
funding. However, it might be removed by other funding sources and if the contractor does
this work they will likely use chain saws to cut the material and a small crane (placed on the
bridgel to life the material from the stream. Removal of this debris would restore normal
stream flow below the bridge and would aid in preventing additional support column
scouring.
11. Explain the purpose of the proposed work: This brid eg rating indicates that the bridge needs
immediate attention to rectify noted functional deficiencies. Present deficiencies include but
are not limited to: cracked pavement, efflorescence and spalling concrete exposing structural
re-bar deteriorated and dama eg d expansion joints surface cracking and abutment settlement.
and. delaminating and cracking on pier caps. The FHWA bridge inspection team last
inspected this bridge in 1997. Present structural ratings are also influenced b average daily
traffic (ADT~ counts and load capacity. No work has been completed on this bridge and it's
condition and structural soundness is rapidly deteriorating. It is extremely critical that these
repairs are made and not delayed to prevent further deterioration and to correct unsafe
structural deficiencies.
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 USACE Action ID Number, DWQ Project Number, application date, and date permits and
certifications were issued or withdrawn. Provide photocopies of previously issued permits,
certifications or other useful information. Describe previously approved wetland, stream and
buffer 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.I.P. project, along with
construction schedules.
N/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 States/Waters of the State
It is the applicant's (or agent's) responsibility to determine, delineate and map 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: The impact of the installation of the
riprap will prevent further erosion of the existing riverbank and protect the bridge piers
from debris which et~ght during flood waters The riprap will not effect but maintain
the current stream channel.
2. Individually list wetland impacts below:
Wetland Impact
Site Number
(indicate on map)
Type of Impact* Area of
Impact
(acres) Located within
100-year Floodplain**
(yes/no) Distance to
Nearest Stream
(linear feet) T e of
Wetland***

~` List each impact separately and identify temporary impacts. Impacts include, but are not limited to: mechanized clearing,
grading, fill. excavation, tooding, ditching/drainage, etc. For dams, separately list impacts due to both structure and flooding.
** 100-Year floodplains are identitied through the Federal Emergency Management Agency's (FEMA) 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.eo~~.
*** 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: 0
Total area of wetland impact proposed: 0
3. Individually list all intermittent and perennial stream impacts below: Approximately 16 feet
of impact will occur on the Big Pine Creek waters' edge This creek is perennial and
proximately 35 feet wide at this area. The impact on the creek is minimal and will
contribute to current creek directional flow during high water periods
Stream Impact
Site Number
tndicate on ma
(~ p)
Type of Impact* Length of
Impact

(linear feet)
Stream Name** Average Width
of Stream

Before Impact Perennial or
Intermittent?
(please
)
s eci

* List each impact separately and identify 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, etc. 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
nearest downstream named stream into which it flows. USGS maps are available through the USGS at I-800-358-9616, or online
at w~~ w.us~s. o~v. Several Internet sites also allow direct download and printing of USGS maps (e.g., www.tonozone.com,
w~~w.ma~quest.com, etc.).
Cumulative impacts (linear distance in feet) to all streams on site: Linear impact on the
stream channel is approximately 16 feet.
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 identify temporary impacts. Impacts include, but are not limited to: fill, 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/embankment, 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.

Work consists of installation of Class 3 riper at the waters edge to form a retaining tune
wall to prevent further erosion of this area. The wall will be built up to a total hei hg t of
approximately 5 feet in total height (3 feet below top elevation of column footin tg o fill
scour cavity and 2 feet above and along stream bank) and 16 feet in length Silt fencing
will be used to prevent and control sediment. A temporary coffer dam shall be installed
around the riprap construction to limit stream bed erosion during riprap placement A
small track backhoe would place the riprap, which can be done completely from the
stream bank without entering the stream course thereby reducing any impact on the
creek's edge and also to survivin~v_egetation. No equipment will be in contact with the
water. Upon completion of the riprap installation type IV geotextile will be placed along
the sides of the excavation and bottom of the riprap
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 1501inear feet of total impacts to perennial
streams.
USACE - 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
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
aquatic resource functions and values by creating, restoring, enhancing, or preserving similar
functions and values, preferable in the same watershed.
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 choose to review the current guidelines for stream restoration
in DWQ's Draft Technical Guide for Stream Work in North Carolina, available at
http://h2o.enr.state.nc.us/ncwetlands/strmgide 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.

Erosion control measures as shown on sheets E 1 F 1 and F2 including silt fencing temnorar_v
dewaterins structures, and other erosion control measures to meet requirements of the National
Park Service and the State of North Carolina. As shown on Sheets S-2 and S-3 a temporary
coffer dam shall be installed around the riprap construction to limit stream bed erosion during
riprap placement. Please see attached supporting, documents.
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
[phone] 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/wry/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):
Amount of buffer mitigation requested (square feet):
Amount of Riparian wetland mitigation requested (acres):
Amount ofNon-riparian wetland mitigation requested (acres):
Amount of Coastal wetland mitigation requested (acres):
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 ^
If yes, does the project require preparation of an environmental document pursuant to the
requirements of the National or North Carolina Environmental Policy Act (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
A CateQOrical Exclusion was prepared and approved for this project per National Park Service
Guidelines (Director's Order #121.
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 must 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
t 3
2 1.5
Total
"Lone 1 extends out 30 feet perpendicular from near bank of channel; Zone 2 extends an
additional 20 feet from the edge of Zone 1.
If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e., Donation
of Property, Conservation Easement, Riparian Buffer Restoration /Enhancement, Preservation or
Payment into the Riparian Buffer Restoration Fund). Please attach all appropriate information as
identified within 1 SA NCAC 2B .0242 or .0260.
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.
Erosion control measures as shown on attached sheets E 1 F 1 and F2 including silt fencing,
temporary dewaterin~ structures, and other erosion control measures to meet requirements of the
National Park Service and the State of North Carolina.
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.
There should be no wastewater generated during thisproject
XIII. Violations (required by DWQ)
Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer Rules?
Yes ^ No
10

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 on
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).

Biu Pine Creek Bridge No. 7
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12

EROSION CONTROL NARRATNE
DESCRIPTION OF PROJECT
ProJed PRA-BlR12A19 cor+slsrs of me r~olr of Jo/MS orxf polMing of Blq Plne Creek Bridge on the
Blue Ridge Parkway of MP 225.01. h also lnGudes pxllg r/proRClass 3 around pier •J footing
os sAawn in Ns plans. TAe fdv/ area ar dlSlurponce for fhe sale !s approximately 0.06 acres.
Recelvlnq waters for runoff Is Jle Blg Plne Crest and loco/ wet/ands.
GENERAL GlllDEL/NES
T1Ie Erasion Contra! Plon iECPI and Ddalls ore Jnaa-porafea Into -Ae Plans
and ore meant as o guldellne for preveMinngg and carlrollltq sedlmelil. lnstoll au
silt fenoe os dlreeled Dy tie Cortredlrq Officer tC01 for ooMraunnqq silt
Da nor modify TAe type, size or location of any caNrd or pravfloe wJtlwt approval
from rte CO.
inspect a/ erosion and sedlmeM aorAto/ ddlces every seven calendar days oM wpNn
29 nouns otter any storm ewM of more Nan %? loco !n preNpifarlan. Repolr as needed
ar os airected A' CQ Clean all sediment caitrd devlees fs!/! fence/ wren Mey bac»rne
nolf fu11 of seaiaent or os dlreaea by Me CO. D/spose of me seelmeM /agony outside
pork Doundarles,
PrevenNrg lNl/ol sol7 erosion /s much more dfedNe flan )rying to contra/ eroded sedlmeM.
Therdor4sroDlNze olld/sturDed areas as soon as Ixadlcal,DU1 not mare flan 19 days after
construcllan adhny Ms temporarly or permoraMry ceased. StoGNzatlon may Oe In the
form of turf estoDNsAmeM. Consfrud temporary wosion caMiols !n lneremeMal slopes
os consfrunflon proceeds.
Atlampl ro croMrd only Me sed~meM-rodeo runoff gdierofed py the proJea slle. Separate
o/id ra:AO C/ean,affsNe rundf fhoupA tte protect using eartA dlvelslon DCrmS, dlver5/on
clnnnds,orculverts.
Do nor drive consiruGlon epu/pment across flowing waterways.
Db not allow consliudlon veNCles fi frock sedlmevu oulslde r/e proJer! llmlts and onto pavement.
Insped/on of e/oslon coMrd devices must oonr/nue far a perlad of 8 weals fd/aving
comp/etlon of permanent turf estodislmeni.
TEMPORARY EROSA~Y AND SfD/AIfNT CONTROL
PHASE /iESTABUSH PERIMETER CONTROLSI
During 11gN cYeorlnq and grading for the access rood. cwrstruct perlmeler cordrols to ensure
iho/ sad/menP does no/ leave lie protect s/le. Primary perlmeier cpMrd dev/ce will be siN fence.
ms-all and malntoln Me dewarerlrq settlenetd dos/n os sluwn by data// !n the plans. Ensure the!
tie Oasln receAres all sedlmeM-laden wafer pumped from fAe cofferdam 1o allay far flnrallon
blare 1f reergers Me waterway.
PHASE lI1/NTERMEDIATE CONTROLSI
Provide sill fence al the tae of all dlsturDed embankment slopes and around all srackplled
exaavaled roadway molerlol. Appy mulch and turf esloDNSlmeM to steakplles remalMng !n
place /anger non l4 wlendor days or when directed A' f/e CO.
PERMANENT EROSION AND SEDIMENT CONTROL
PHASE IIl1F1NAL CONTROLS/STABILIZATIONI
Restore rte oocess rood to natural coMOUrs,an0 remove Oewarering basin os d1reCJeO by
0' f/e CO. Where necetssory, rgodace Aiµsoll and r~ppy permanent turf es7abllshneM fo
disturbed areas w/cre vegelai on Aos oaf been eslobllsAsd. Permanent turf eslodlsMenT
sAould be !n aompllonce wifA tte 81ue Ridge Pvntwoy Seed/ng Specificolions.
Inspect clean ono repolr ol! rlprop Doslns and stoGllzed cMnne/s and slopes.
Remove all silt fence any otter ne access rood Ras been sfaDlAtaf.
SPECIAL PROJECT CONSIDERATIONS
Supplement erosion coMrd measures as described !n tMs ECP or os dlre~cled Gy t/e CO
fo assure not pro Jed runoff does oaf dlreGty enter lAe waters a( f/e nearby stream.
Supplemental measures may Include oddltlona/ slit fens. diversion Deans, etc.

Umlts d
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Provide su/rldait brptA-~
ro prera7 wNer rrom f/pv/np
oround th and d th sin fence
YOx.spOdrg 6'
SILT FENCE INSTALLATION AT TOE OF FILL
~ f NIn.36" la/q pall
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oLOVe yraxM ~
Post dr/ven nfln ~" I [J 6„
!MO Around n
Ndet
Anernale pre•ossemD/a0 slit rence apRons w1AOB dlawed
os /org oa spec/fied mlMnwms ore sdl5fied. Fd/av
narwradurer's Inrarmdlon far inatollonan procedures.
8" Trench
fool to soobl
OM Oaapxted soJ!
Top Vlew
JO/NIIVG TWO ADJACENT S11T FENCE SECTIONS
SILT FENCE INSTALLATION IN A DRAINAGE OITCN
Nate: use dralnape d1lCA fnsta/blion for law flaw ardnlans ony who speclrles on Eraslm CoMrd Plan.

PRO.ECT
PRA-BLPo 2AN
TEMPORARY DEWATERlNG STRUCTURE
errt
PLAN VIEW
r<. r~/P. v
4 MNMM roNINI
prNIbIN1 IO M
p~ ,,, r .~„~ OW.Rn4 raaTlo. r/q v
TAASnro ~tse, NII/Mnr roNTN..NT IupPNINU
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SECTIONAL VIEW A-A
TEMPORARY DEWATERlNG STRUCTURE GENERAL NOTES:
1. TAe primary use of the lemporory dewatering structure Js for dewatering
cotferdams,lrenches.enclosed ditches.etc.
2. TAe min/mum required volume of storage In cubic feet for the temporary
dewatering structure !s obtained Dy multiplying the pumping rote (see foD/e1
!n gallons per minute. by l6.
3. Divert any slormwafer away from the temporary dewotering structure.
4. Attach exposed geolextlle fabric to existing ground surface to prevent
movement.
5. Contractor may e/ecllo cover entire ground surface area w/tA geolexille
faDrlc to facilitate ground surface restoration.
6.Locotion of the temporary dewolering structure
must De approved Dy the CO
7. Restore all dlslurDed areas to original conditions.
TEMPoRARY DElVATERlN6 STRUCT RE VOLUMES
P MP R STRUCfURf

TYPE
(DIAJ YANUF.
CAPACITY
( GPY
lGA11DNS PER V01UYE REUQ
!CUBIC FEETI
~ _ IN - - - ,__ _ ---- HI - 4 ---
.1 IN. IS 260 4,160
q IN. 8
1

DEWATERlNG SETTLEMENT
BASIN
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ELEVATION
Nor to seOlo
u.s. DePARrNENr Dr rRANSrarAnoN
PEOERAL NIGI~Ar ApIMISTNATION
14(or0~ /Na1010n1 nrMe FASTEN FEDERAL lAr4s MIGMAr DIVISION
L EsnON rr rprM a1 PMr Ah !. Alprr Nr/s n nr rNlr oaNrlOls BRIDGE OVER BIG PINE CREEK
M ~'OI.YM/ a' rM C0.
L NYIII I s+wsMArl. ~AraOwnf N ryp N rrfN alI crrOS !
~' ngrro .erws -n. eMo11Y 4srlw n rrr7nj n s NnnwNl n~sls BRIDGE NO. T
BLUE RIDGE PARItNAY
shsNr. AM ssl/ISOISr rYri u /441111M ro rN swr rwa
ALLEGMANY COIxli1 . NOIITN CAROLINA
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DETAILS
} N0. r vl I N0. DA r REVK10NS OESICNED 0r A/N 0r Ca<ED RT AlE PIrO.ECT TEAK L R I DRARIrt. DAT DRAMING N0.
Sr Pon Sr Pon -OfH
A M ino.11 ST POn ! OI Ir Julr 4007
.
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TYPICAL BENT ELEVATION
Scala '/~".° I'-0'
PLAN
Nor to Soale