20090136 Ver 5_Application_20110120

NNOWNW41M
XMMW4?
KCI
ENGINEERS ? SURVEYORS ? SCIENTISTS ? CONSTRUCTION MANAGERS
LANDMARK CENTER 11, SUITE 220 ? 4601 SIX FORKS ROAD ? RALEIGH, NC 27609 ? 919-783-9214 ? (FAX) 919-783-9266
January 20, 2011
NCDENR
Division of Water Quality
512 N. Salisbury St.
Raleigh, NC 27604
Attn: Amy Chapman
Subject: Dunn Creek Greenway - Wake Forest, NC
UT Smith Creek [030402,27-23-(2), C, NSW]
DWQ EXP#:09-0136y.? VS
KCI Associates of North Carolina, PA (KCI), is writing this letter to request a modification to the buffer
impacts authorization granted by DWQ in a letter issued to the Town of Wake Forest and dated March 2,
2010. Additionally, revised impacts were granted by DWQ in a letter issued to the Town of Wake Forest
and dated August 23, 2010 for boardwalk construction.
The project is currently under construction and abutment construction is the controlling operation. The
project has been plagued with delays from subcontractor performance and weather delays. The
Contractor has recently been issued a Stop Work Order for unsafe working conditions at Bridge B and
Bridge D. The safety concerns at Bridge D have been addressed; however Bridge B is still concern. The
contractor has excavations of approximately 8 to 10 feet in depth with no shoring. Obviously the
excavation is non-compliant and needs attention before work continues at this location.
KCI is requesting that a modification be granted to the temporary buffer impacts at Bridge B to provide
the contractor additional space and provide access for construction equipment around the excavations.
The additional impacts will allow the contractor to slope the excavation back at a 1.5:1 and provide a
safe working area within the excavation. The buffer impacts will only be temporary and the contractor
will re-establish the natural cover of the temporarily impacted areas after construction is complete.
KCI has provided Drawing C-1.2 with the associated temporary buffer impacts highlighted for your
review. In addition, an updated spreadsheet with associated buffer impacts has also been provided.
Should you have further questions concerning the modification to the buffer authorization please feel free
to contact us at [phone].
Sincerely,
?=
T. Ryan Lavinder, PE AN 21 0 2011
Civil Engineer DENR•WATWOUNM
WETLM AND STORMIER MWO
KCI ASSOCIATES OF NORTH CAROLINA, P.A.
www.kci.com
Employee-Owned Since 1988
6. Modified Buffer Impacts (for DWQ)_1-19-11
6b. Buffer impact # Reason Stream name Buffer Zone 1 Zone 2
Permanent (P) or for mitigation impact impact
Temporary (T) impact required square ft square ft
B1 X(P) greenway Dunn Creek No 1643.98 1676.70
B2 X(P) greenway Dunn Creek No - 790.99
B3 X(P) greenway Dunn Creek No - 885.40
B4 X(P) greenway Dunn Creek No 90.75 1363.10
B5 X(P) greenway Dunn Creek No 297.72 2045.07
65A X(P) greenway Dunn Creek No - 12.18
B6 X(P) greenway Spring Branch No - 5.94
B7 X(P) greenway Spring Branch No - 428.49
B8 X(P) greenway Spring Branch No 2346.00 2867.81
B9 X(P) greenway Dunn Creek No 1660.17 2963.70
610 X(P) greenway Dunn Creek No - 259.60
B11 X(P) greenway Dunn Creek No 391.92 639.24
B12 X(P) greenway Dunn Creek No 3429.34 1041.72
6h. Total Buffer impa cts 9859.88 14979.94
X confirms the impact is permanent (P)
6. Temporary Buffer Impacts (for DWQ)_1-19-11
6b. Buffer impact # Reason Stream name Buffer Zone 1 Zone 2
Permanent (P) or for mitigation impact impact
Temporary (T) impact required square ft square ft
B2 X(T) greenway Dunn Creek No - 545.52
B3 X(T) greenway Dunn Creek No - 617.62
B4 X(T) greenway Dunn Creek No 67.6 191.19
B5 X(T) greenway Dunn Creek No 361 1087.88
135A X(T) greenway Dunn Creek No - 36.49
B6 X(T) greenway Spring Branch No - 563.34
B7 X(T) greenway Spring Branch No 1937.63 1158.19
B8 X(T) greenway Spring Branch 1356.79 606.65
B9 X(T) greenway Dunn Creek No 569.06 -
B10 X(T) greenway Dunn Creek No - 82.96
B10A X(T) greenway Dunn Creek No - 126.51
B10B X(T) greenway Dunn Creek No - 213.25
B11 X(T) greenway Dunn Creek No 492.99 1095.39
6h. Total Buffer Impa cts 4785.07 6324.99
X confirms the impact is Tempora ry (T)
/ ~ _ 'r ZONE 1 & 2 IMPACTS ~
, ~ BS ZONE 1 = 2346,00 SF = 0.054 AC ~ ~ ~ / CLEAR WATER DIVERSION (A) j ~ ~ ~ ~ CHANNEL CALCULATIONS ~ ~ ~ o
~ SPECAL F1000 ~ 68 ZONE 2 = 2867.81 SF= 0.066 AC ' / HAZARD AREA g8 ZONE 1 TEMP = 1356.79 SF~ 0.031 AC 4 ~ Given Input Dato: ' , LIMITS OF DISTURBANCE = 3.0 AC °n
! / / ' ~ ZONE 2 TEMP = 606.65 SF~ 0.014 AC f Shape Trapezoidal _ j` Solving for Depth of Flow
I ~ ~ ~ / Flowrate 0.1000 cfs Slope 0.0800 ft/ft ~n
/ Manning s n(NAG Roughness)....0.0450 I
1 ~ i PC = 31+66.34 rp ~ l ~ ~ Height 36.0000 in ~ a Bottom width O.OD00 in n Left slope 3.0000 ft/ft (V/H)
\ ""J HOLDING VILLAG ~2 ~ X00 % / / ._.i- PIN 1640-44-84400 SFL D / Right slope 3.0000 ft/ft (V/H) ,
3 ~ TREE PROTECTION J D6 12902 PG 2421 FLOOD PLAIN ~P 1 / .E PROTECTION Computed Results: 1 / JCE (TYP,) o~ ~ ~ Depth 5.2418 in m
/ ~°0 N ~ ? ~ o ~ FENCE (TYP,) ~ ~ ~ x< ° / ~ Q~ ~ ` ~ ~ , Velocity 1.5723 fps o / Full Flowrate 17.0425 cfs ~
/ ~ ~G F / Flow area 0.0636 ft2 a
~ , ,~~E ~ _ ~ ~e l Q / Flow perimeter 11.0506 in rx ~ ~ Hydraulic radius 0.8288 in `n
- ZONE 1 & 2 IMPACTS F~°' / ~ .f ~ ~ Top width 3.4945 In ~ ~ c~
B7 ZONE 2 = 428.49 SF: 0.0098 AC m e `~°o ~ ~ ~ - ~ _ , ~ ,f i ) B7 ZONE 1(TEMP) - 1937.63 SF= 0.044 AC ~,G kpo ~ y I' Areo 3.0000 ft2 Perimeter 75.8947 in / / Percent full 14.5605
f B7 ZONE 2(TEMP) = 1158,19 SF~ 0.027 AC _ - x % ~ - RocK wL r I 1 ~ °p~ 'TRAP T1PE rte- ~ RO ~ I~ET LECIME~T
? t ~ ~ ' ~ 4Q ~°p d t ~ ~ ~ DIRECTIONi TRAP TrVE 'C-SI L ~ ° n ~ DIREC11uNAl_ FLO~
r~ ~ " ~ ~ ~ / , ~ uk zG ~ ~ Z
~ r ~ ~ 0ti LOT 784 t ~ ' 1 ~ r, ~°O 1 ik~ _ / / D - -_00 ~ ~ , \ 9 r ~ ~ t ~ ^S~ ~ ~ TIuTy FgMC C ~
0 ~ \ i ( i' t t ~ ..gyp ',Q~z'~ i / <; ~ + ~ / r, P ~
\ r i ~ j i / PC = 29+74.93 ~ I ~ ~°Q ~ - / 0 ~ p / , °V1 n , i ` j a °o i 1 / 1 d o
/ \ ~ it EXISTING 24 RCP, ~ \ f LOT 783 ,l ! ; va - \ T,„,~ Q 9i = ~ ~ P\ _ , ~ GFX I tf n ~ W
- ~ /J j r,, 5,, ~ _ ~ EX. PUBLIC STORM SMT J ~ p, ; ' ~ : ~..,.t ~ D Ok0 i S o /i- ~ ~ r~ ~ J 9~'ECIAL Fi'OOD ~ ~ i 'HAZARD~'AREA ~ ~ ~
_ ~ (Yr1DTH VARIES) ~ ~ / TP ~ ~ , SF s , . _ r .,.G-- _ % ~ r` ~ w w 1 £ 1 , ~
< ~ ' ~ r r < ~ ~~ti. ~ r ~~f~~ ` FLOODWAY ~1` 1P %~QY ° ~ • r ~ i ~ ~ 1 u j r TP ~ / p J ' 0 ~ `CHECK OAM ; ~ ~ .z yS ( r ~ o 0 ~oJ r f ,r 1 ~ v t
V ` ,o t' .-ZONE 2 IMPACT r ~ °~oD , / ~o,~ / s .,m w. " - ~ ~ V ~ r ~ j ,r J ~ 1 i ~ _ 4
° .y ` 86 ZONE 5: 4 ~ F.' .Dt12~ "w~ - ~ t --°~oD s / - , - A ~ _ M~. ~
r~`~ m 86~ZaGlET2/~MP~ =-563. 4" =~1..Q122~~/ C , ~ ',p ~s~oo / ~ ~no-~'"~ i ~ r r ~ ~ ~ .A ~ < / / _ SOD , ~ . - ` ~ ° e f:~ ~ ~ SET ' f l~ 1 ' ~ ~ a ~ a u.
~ . ° ft, i j ~ CLEAN WA~ DIVERSIOt~~( ~ ~ ~n o a
< ~ " ° ~ . w, ~ 3400 ~ 100 ` PROVIDE 160 LF~7 TH AMERICAN ~ ~ Z z m m ti) GR~EE(J TEMPORARj.IpIER S75 OR M~ a a ~ a
EXISTINGBYPAS~' w~ '~ybtlV .y00W" ~.~.w F°~-D0~`~ ~ ~ / o° ~ ~6;,-~', J _ .SF~ :t t 28_.- 9 ° ° ° ,r - ~ SOT s~ ~ STRUCTURE (~ERbTAGE ~ °~OWALK_ I ® i~ gf . fldY _ ~ .w- / ° DO - 1bi' >5f= ~ ~ ~ ~ C0 d~~ APPR r hEQUAL IN ktANNEL NEW o ~ a d o o i , ~ P C0 ~ ~ -.SF _"''c SF ~ \ ~ td~ ~ BOTTOAF, ~ g,_ _ w'~~~ y _ tfNf TREE a 0 0 0 0
Sj18pb~lON)r' r SF p© / w..- _ ,r EklsTi c 13iPRAP" - - o sF rao. _ . F / ~ y rp J ~ q Clfp'1 0+~j ~ A ~ ~ ~ pfNCE ~ O~CnON ~ ~ ~ v~~i uwi n ~g , { r_ . U
/ -'bPSSiP?rl"OR PAD p"~~ ~ 6F cS0 / ~ ~ ~ ~ ~ r f.. TP, r TP~ T 0p~~`SF_ ~ _ . O~! ~ p TR OF © ~i l~ w w P~ ~
HER ~SUEDIVISION) 7 pp F ,r. SFD / / ~ ~ j 1 r J J ~ C= 32+97.46 LoD"~! _ .flay ~ , / _ ,F 1 , k'^ ~ ~ D~~ ( f ~ ~ ~ r 0 ~ sF 3~~~~ ~ ` 0~ . _ _ . ~ pCR~Ary ~ BARCE U
- ~ ~f REMOVABLE / - ~ o ~ ~ ~ / INSTALL 25 LF OF SILT , < -~"`ri' ~'J1 PIPE BOLLARD / yc~°' - / ~ / / FENCE AT EACH CORNER OF , j j _ ~ y~ i PT ~ 1, w , P,\ ~?~"~•"8~ ~ '1~~ z$ W° dl 11tafR~A~6~I~~!~!0 ~ ~ a ~ ~
y J, 1, _ ~ ,c. / / BRIDGE MAT CROSSING. / / \ / ~ r ra Go'~.. sF ` ~ - Q~ R S 5 GRf N NOR "w ` - N ° r _
~ „c,~ . / , ? r I SF~ Sfl~~ ~ ~ ,.floc.. ~ ~ \ ~ i / t \ i` ~ ~ ~ ~ ~ oosr^ - N cyO~R, AA~R ORgR)' ~ ~ \
`-Ex1STING LEVEL y o / / CONTRACTOR TO PROVIDE BRIDGE"FIAT - ~ ~ t / ~ CROSSING IN THIS AREA. B LOGE MAT SHOULD 1 / \ SPREADER (HERITAGE / ~ r - t ~f / R
~ / \ - o ~ ~ / ~ BE IOCATEO IN EXISTING STONE CROSSING e\e~ ~ \ , = SttBDIUISION)- - - ~ 2~0. ~ / < ~ , (SEE SCHEMATIC SHEET C-~2.1) SCARIFY AND •
0~- tT~~IPO / / ~ SEED ANY EXISTING BARE GROUND AFTER \
RF PR / COMPLE110N OF CONSIRUC110N r rte / / 0' _ ~ / / ~ , / ~ SURVEYED TOP OF BANK / ` " "~~~~'h"-~.~\ o~s~ ~ z~`~.~ by
~ ~ / i % p / _ ` .
' O / / LEGEND . _ • / ~ SILT FENCE (TYP.) t`~ tP Q~ ~ ,r"'~ ? ~
/ / , 30 ZONE 1 LIMIT / \ FLOW \ / APPR~1X~CENTERLINE OE TREE LINE ~ ~ LIMITS OF ~ Op ~ ~ ~ ~ c~d ~ a„ ,DISTURBANCE (T1P.)
a~ S EAM NEUSE RIVER 6UFFER a SITE BUFFER \ ' ° P'" 0 ~ O ~ P S,
~NG BRANCH ~ - - 100 YR FLOOD 2 PPROX. TOP OF HAr;h ~ STREAM CENTERLINE ~ A~ ~ PLAIN
o ~ ~ s / / - GREENWAY CENTERLINE • y o. o. / 500 YR FLOOD • . WETLAND AREA ~ \ _ / s} T ~ O pC ~ ° 0 ~ S~
PLAIN ~ i ~ / STATE OF NORTH CAROLINA GREENWAY (EDP) PI _ - - LOD L°D LIMIT OF O ~ 36+ ) S-i 0 ~
TOWN OF WAKE FOREST i / / ~ 1640 62-8697 DISTURBANCE \ / DEED 9069-01 - - - - - - - - FLOODWAY PIN ~ 1840-fi4-7176 ~ CONSTRUCTION \ Pr ` 361 63x0 ~ S~\ ~ • U ENTRANCE ~ \ p~N NDyO 9485 ~ ~ ~
\ / _ _ - TP rP - TREE PROTEC110N DEED 10537 PG 709 / ~ \ / FLOODPLNN
/ / ~ ~ , ~ ' - Z''o, \ / SPECIAL FLOOD HAZARD AREA pooo o°~ s^ / DODO oo°°p0oo RIP-RAP f~~3j>'G~S 2 ~ ~
~ ~ ~ - ' ~ ~ ~ / ~ ~ \ / PROPOSED CONTOURS MAJ R SF - SF ooooo~ \ , ( 0) SILT FENCE °oooopp0o DISSIPATER 5g \ ~ ~I-I ~ a O
i / / a / PROPOSED CONTOURS (MINOR) ~ SILT FENCE Pr a Q • N ~ BOARD WALK 32~,I 6g ~ ~ ~ ~
/ / OUTLET
00+00 MATCH LINE THESE PLANS HAVE BEEN APPROVED FOR CONSTRUCTION BY THE TOWN
OF WAKE FOREST. BR DGESED U ~ ,x N ~ ~ U Pti a~
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• ~ E ' ~ S f I 2 EXTEIJD DRILLED i i 234 ~ - s _ i f... _ z t ~ _ ~ 234 HORZ SCALE:
~ ? E I ~ € PIER T6 ROCK I a ~ i i ( .I,.. , ~ , , i ` a (ELEY 228 t) i ~ I 1 E f E ~ ( 3 ~ ERI SCALE
1 ~ I ~ ? i i ( ? II II~ II I~ ~I I~ ~ i-EX'~END DRILLED f ~ ~ V
PIER TO ROCK I DRAWN BY: TRL (ELEV 223 t} E
C ~I I I.... CHECKED BY: 232 DMK
232 -0 r 3 ~ ' 3 J~ I DATE: 10-26-09
z E e PROJECT NO. PR 12082306-A
27+00 28+00 29+00 30+00 31+00 32+00 33+00 34+00 35+00 SHEET No.
C-1,2
PERMIT DOCUMENTS _SHEET OF