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Michael F. Easley, Qovernor
William Q. Ross Jr., Secrotary
North Carolina Department of Environment and Natural Resources
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Street Address: 2321 Crabtree Boulevard, Suite 250
Raleigh, NC 27604-2260
Mailing Address:
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Alan W. Klimek, P.E. Director
Division of Water Quality
Division of Water Quality .
Department of Environmental. and Natural Resources
401 Oversight~E~press Review, Program Development and
. Transportation Permitting Units
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4010versightBxpressRcview Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone [phone] /Fax [phone]
Internet; http;//h2o.enr.state.nc.us/ncwetlands
1650 Mail Service Center
Raleigh, NC 27691650
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Fax #: -919-733-6893
An Equal Oppon`.unlty/Afflrmatlve Actlon Employer- 50~ Recycled/10°~ Post Consumer Paper
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Division of Water Quality
Department of Environmental and Natural Resources
401 Oversighf/Express Review, Program Development and
Transportation Permitting Units
Street Address: 2321 Crabtree Boulevard, Suite 250
Raleigfi, NC 27604-2260
Mailing Addrose: 1850 Mail Service Center
Izaieigh, NC 2T6y49f ~ 503 [I
Contact Information: P ono #: 9~9-733-1786
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Aiken. & `yelle Associates, PA
~7+`y~5y Denson lJriue
Attention: C~tr. F3ataald't'elie
Subject: Report of Subsurf~ Eploratican
Bottc-rn[ess Cu[vert - Ceder Ftic[~ ~u~divsibr~
lc~lesuille, l~lc~rth Carcilina
Job f~to. F-2~~ , Report Na. ~ ~~62~
C3ear ktlr. Yelle,
This report presents the findings of r~ur saabsurface exploration cif the site piaraned for a
l~cattomless culvert that will crt~ss under Virginia mater Drive. The explorati~in +~tas pa~rftirra?ed in
general acccard'ance with our Proposal I`Jfl. P07-~~~ dated March 2~, 2€77, and Prop~al
Acceptance 51~eet autl~ori~ed on April 1, 2~"~. The purpose of the. exploration was tti spot-
chc for the presence t~f shal[ciw ruck. ~ci geotechnical rect~mendatians paartainirtg t€i the
design and constructa~n e~f the culvert are pr~auided at this time.
I~I~.t~J~CT IN~'C~RNfATIQN
The project entails the design and ccnstruc~#ian rf a bottarn[ess culvert that. will span ~ creek for
c~intinuatic~n of ~i,rt~ania ~!aters Drive as shnwn Qn the attached figure l~lo.t. This roadway
a~arrasntly terminates about tt}t~ feet west of the creek. As ~.ve understand, ttte rcaprssed culvert
will generally be designed tri folla~w tree curving a[ignrnent of the creek fer ab~rut 7l~ fa:t. `l he
culvert's cress sectian wGli tie abc~tat ~~ feet wide and 1 C~ feet to€!. The terrain at this site is steep
and groundctiver ccin~ist~ of thick brush and trees.
EXPt_C~FiAT[t?hi METHQI~S
kl4ae performed a series of hand wager b€irings slang each side cif th? creek spaced at abriut 2~-
fcaot intervals and aafl`set apprt~xirnately ~~' frar~a the creek's c~nt~rline. Ti'ae liarings were
advanced using a '-inch diameter bucket auger until. refusing pan hard materials.. Based an this
method of explaraticin, hard materials that were encountered were a~surned to be partially
weathered r€~k, Sarrtples were nit obtained for classification.
Probes were perfcirmed alrang the a:enter of the creek to suppl~*ment our hand auger bflrings. ~
small diameter steel probe rcid wars used to penetrate the relatively hose creek bed sedirrments
to refusal. The deptfas to refuse! ware: recordedln addition to the hand auger borings.
'4nle used taped measurerraents to late our farad auger baring locatiat~s and a survey rod and
level to obtain.. approximate ground s~urrac+e elevations at eaeti herinc~ relative tri a nearby
rrtanhoie cciver rased as a benchrraari~ ~Elevatic~n ~QC~j. A c~raterline stake fr~r the rciadway had
been installed adjacent to tt7e creek and we used this stake as a reference in laying out caur
bor"ang locations.
4.521 S ~~.3,.1str I'~~ Bs~;r,h~lurre~ i;;arnh¢~s 275?2 !q"yi 3~3-`h~9p (~ }41~} 363.715

Prop+ased Bt~t#or~l~ss Culvert - G~dar Kdge - Knlesville, C ~r1ay ~14, 20t~~
Jib tdo. #~-2381, lepcsrt ~Ic?: 128~i26 Psge ~
~EC?t_t'}G'1~
The site is located iH the Piedrrtant Physiographic Province- t~f l~lt~rth Cart~lina. Geologic
rnappirag indicates that the predt~rnir4ate forrnatitrn is foliated to massive granitic rack of t~?e
Raleigh Belt. The site soils, formed as a result of weathering of the uraderlyir~g parent rock, are
termed "residual" and typlC~lly ~rlciude firrrj sits and Gic'l~` subsoils trar~s~tionEHg tQ grams ar
materials with iHCreasing depth. Underlying the residual sails is partially weathered rack (PUNK).
The surface of partially weathered rock w'ili be extremely erratic and variable, Hard rc+ck layers,.
boulders, and pinnaoles of rock caH often be enct~untered within the t~verburder~ sails and
exposes as outcr~aps at the gre~und surface.
FINl~11VG
The exploration encountered base alluvial Sandy sails that were underlain by shallow depths of
partially weathered roes at all cif the baring lacaticr~s. Kock o~utcrappir~gs were observed
t~pstrearr~ from the proposed. crc~sirig at various locations clang the creek banks, Topsoil was
en~untered at each of the boring lotions and was. found to be as much as 1 foot thick. Upon
completion of the hand auger borings, groundwater collected In all of the borings anti generalty
stabilizEZti at the same level as the adjacent creek. Tabulations and generalized profiles of the
subsurface cioHditicar~s er~cauntered were prepared an;d are presented off the attached Figure
Na. 2.
~tG K tC~'ItYI»C]CaE M E ~T
This report has been prepared f~-r the exclusive use of .Aiken ~ Yetle Associates, PA fr~r specific
application trr the suia~ect project as described. This report of exploration has been farepared
using generally accepted standards taf geotechnical engineering practice. ttila ether warranty is
expressed or implied, GC)K is nt~t responsit~le for the nolusions, c~pinians, ter
recx~nnmerrdations of esters basest ors these data.
UNe appreciate the cppcrkunity to kae taf service to you: Please contact us if ciu have aHy
questioHS regarding this report or if addlticaHal services are Hearted:
Sinoerely,
Q{~RE, 11V;~,
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Christopher D. Carroll, E.I,T. t,,~~~~rx~+~,.f,
Staff Er~giHeer ~ A~r~/,~"'>,,,~
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David T. Cunningham, P,
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