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Home My WebLink About20052049 Ver 1_More Info Received_200811190,5 _ ao y 9 CLEARWATER ENVIRONMENTAL CONSULTANTS, INC. November 18, 2008 Ms. Linda Wiggs North Carolina Division of Water Quality Asheville Regional Office 2090 U.S. Highway 70 Swannanoa, North Carolina 28778 LI ' W ?I NOV 19 2008 DENR WATER QUALITY WETLANDS AND STORWIVA?Er BRANCH Reference: Remediation Plan for Unnamed Tributary to White Oak Creek White Oak Plantation Polk County, NC Dear Ms. Wiggs, On August 26, 2008 C1earWater Environmental (CEC) conducted an erosion and sedimentation site inspection at White Oak Plantation (WOP) in Polk County (Figures 1-2). During the site inspection, CEC noted a sediment basin near Sandy Plains Road had failed during the consecutive heavy rain events. WOP contacted DWQ and reported the lost sediment to the Unnamed Tributary to White Oak Creek in order to comply with the twenty- four hour non-compliance requirement that is part of their General Permit NCG 010000. WOP submitted a remediation plan on September 11, which DWQ then approved September 22, 2008. This letter concludes all documented remedial actions DWQ approved on September 22, 2008 to remove the sediment from the Unnamed Tributary to White Oak Creek. Photo documentation is included below presenting stream conditions prior to and following the erosion control failure. Sediment Removal from an Unnamed Tributary to Little Willow Creek On September 3, 2008 C1earWater Environmental Consultants, Inc. (CEC) conducted an erosion control inspection at White Oak Plantation to inspect the extent of sedimentation in the Unnamed Tributary to Little Willow Creek following a heavy rain event on August 26, 2008. CEC recommended that sediment removal activities begin once DWQ approval of the sediment removal methodology is attained. CEC posted flag stations throughout the Unnamed Tributary to document pre and post remediation conditions, however; these original flags were lost and CEC had to re-hang new flags on October 14, 2008. These new flag stations are included in the pre- and post photo documentation. 718 Oakland Street Hendersonville, North Carolina 28791 Phone: 828-698-9800 Fax: 828-698-9003 www.cwenv.com Ms. Linda Wiggs November 18, 2008 Page 2 of 11 The sediment removal was conducted by hand labor only (5-gallon buckets, shovels). The stream bed in the 400 feet closest to the basins had minimal sediment deposition that was maximum 1 inch deep. The depth of sediment increased to approximately 6-12 inches as one followed the Unnamed Tributary away from the basin and into the flatter flood plain of White Oak Creek. Only the top 1-12 inches of accumulated sediment was removed, leaving the original stream cobble in place. In the field adjustments were made to determine the amount of sediment that should be removed from the Unnamed Tributary according to observations of the soil color and original streambed conditions. This accumulated sediment was deposited in a sediment basin approximately 25 feet from the stream. No construction equipment entered jurisdictional waters. Further actions included removing debris and riprap from the stream channel, and stabilizing banks following sediment removal with vegetation. Please do not hesitate to contact me at (828) 698-9800 if you have any questions or comments. Sincerely, A?" a galz er Project Biologist k. R. Clement Riddle, P.W.S. Principal Cc: Michael Carroll, White Oak Plantation Ms. Linda Wiggs November 18, 2008 Page 3 of 11 Photo Documentation: White Oak Plantation (WOP) 4S ° It Se i Si ` 4 IM f y w ,? ! ? 14 Y4 j-• ? _ a) l t ? ? d y ? ? /+' «. . M `E S11 T W ? r al? vr„?>m ?+ra+ - 1Y' , s?- p? yr ' a _? aul` rie,?4 a- Photo 2: WOP Station 1 POST sediment removal Photo I: WOP Station 1 PRE, sediment removal Photo 3: WOP Station 2 PRE sediment removal Photo 4: WOP Station 2 POST sediment removal Ms. Linda Wiggs November 18, 2008 Page 4 of 11 t.. I -nrf: Photo 6: WOP Station 3 POST sediment removal t ?Lt =a 4 ff I*F f r 1 t ''^ 7 ,?p ? ? r fty l E f bd+ .mot ?^4?Y? { ? .. ?yy ? 4 w v f.A_ ?11 5 ? iNy S? F ?? x ,. r ? qq " ? ` p ..Y y m +r fp , q 1 i S l a Photo 7 and 8: WOP Stations 1-3 stream substrate; fine sediments were removed leaving original stream substrate Photo 5: WOP Station 3 PRE sediment removal Ms. Linda Wiggs November 18, 2008 Page 5 of 11 Photo 9: WOP Station 4 PRE sediment removal and bank stabilization Photo lo: WOP Station 4 POST sediment removal and bank stabilization Photo 11: Stream substrate following sediment removal from WOP Station 4 Ms. Linda Wiggs November 18, 2008 Page 6 of 11 Photo 12: WOP Station 5 PRE sediment removal Photo 13: WOP Station 5 POST sediment removal Photo 14: WOP Station 5 Stream Substrate POST sediment removal Ms. Linda Wiggs November 18, 2008 Page 7 of l 1 sediment removal Photo 16: WOP Station 6 POST sediment removal Photo 15: WOP Station 6 PRF? sediment removal Photo 17: WOP Station 6 stream substrate POST Ms. Linda Wiggs November 18, 2008 Page 8 of 11 Photo 18: WOP Station 7 PRE sediment removal Photo 19: WOP Station 7 POST sediment removal Photo 20: WOP Station 7 stream substrate POST sediment removal Ms. Linda Wiggs November 18, 2008 Page 9 of 11 ? 4 C ,? ? ? ""c.' Y?2?fs?'%? bP• ii?t?;? ? ? 1i. V ?+. y'? 440 Photo 21: WOP Station 8 PRE, sediment removal Photo 22: WOP Station 8 POST sediment removal Photo 24: WOP Station 9 POST sediment removal Photo 23: WOP Station 9 PRF, sediment removal Ms. Linda Wiggs November 18, 2008 Page 10 of 11 'Q'tr a C F mY p.? 41 F i 9 Photo 25: Stations 9 and 10 PRE sediment removal Photo 26: Stations 9 and 10 POST sediment removal Photo 27: Stations 9 and 10 stream substrate POST sediment removal Ms. Linda Wiggs November 18, 2008 Page 11 of 11 Asp, ...sA.. ?•"? art. -s• ??, ,? o- ? .gip n ? w Z ?,.u?+_ _ t 7G: rK4 mss, Photo 28: Renw',ed sediment piled at sediment hasin during remediation work Photo 29: Removed sediment spread out and into sediment basin upon completion of remediation work '44 C / -' ? ?, I t s r r v 'Qj Th Ste, 3 _ J .? ? ), C I , f r•( r 11 _'` \?. i ;- Its q { \ ? rJ y U", f ' rt of 31. /\y? ? 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Vicinity Map North Carolina 718 Oakland Street Hendersonville, NC 28791 Figure 1 828-698-9800 I \ 7 _.r' gg `, e T§si. °Ra*. .. 1 ('I t pia\...?•.. ..r '1'.." ?) ''....,, ? ? >/'/"".' 11 ? ? ,. - ?f i l1„`-•, .b ti/ }1 ,.??'' yvh cC^Gk .• !'-...' .__ ?? ?.. 11 ,/ ran \ f 4 ? ` _ toss n ' -, I / 91 - !? s? ! - < < '. Ass I;': LAM ` I 1 7 ' 11' t n ' mce ? % , Lw i L r o i N w J I I '? 4- • PkGJECTS SITE ,T'a? Stream included -_ /' - in remediation l p an -e< --- ?` `) _ r}f\`,? / r?u ., ?:• ?r •.1 ? '..tip ,• f i ,? ?1 J / l . . I -?? fL at I ! f ?. o?x J "C' ` i ? ? -II ? i t ? i 4 ??x K))? ? _ ?eef-6•Lrdk ? / 4 \. \, ? /'" `± ?133T1 32 1 F 6 .` Ir ` ? I ?? ?` ) •I ??? ? r ? . ? , l 3-D TopoQ & CHP3rj& Q 1999 Deiarme Ymmn* ME 0a% S..t Dam: USGS 750 & Scale: 1': 2,000 Deta7 130 Daem: WM White Oak Plantation CLEARWATER Polk County Environmental Consultants, Inc. USGS TOPO Map North Carolina 718 Oakland Street Hendersonville, NC 28792 Figure 2 828-698-9800