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HomeMy WebLinkAbout20091312 Ver 1_401 Application_2009120909-1312 LETTER OF TRANSMITTAL IkWK WDICKSON community infrastructure consultants 720 Corporate Center Drive Raleigh, North Carolina 27607 919.782.0495 tel. 919.782.9672 fax TO: NC DWQ 401/Wetlands 1650 Mail Service Center Raleigh, NC 27699-1650 ATTENTION: DATE: December 11, 2009 SPAID RE: Town of Newland Flood By-Pass Channel & Pineola St. Floodplain Improvements PCN Package We are sending via: N Overnight ? Regular Mail ? Pick-up ? Hand Delivered The following items: ? Correspondence N Plans ? Specifications N Other as listed below: COPIES DATE NO. DESCRIPTION 1 12/11/09 Completed PCN Application (with Attachments) 3 12/11/09 11" x 17" Set of Project's Design Plans 2 12/11/09 24" x 36" Set of Project's Design Plans 1 12/09/09 Review Fee Payment (Check #58013 in Amount of $570) r"-"5 e=j nr% "= --. .:A DEAR - OTER TY TM I &Mwo raw o lUKMM I CK WW" THESE ARE TRANSMITTED as checked below: ® For Approval ? As Requested ? Approved as Submitted ? Returned for Corrections ? For Your Use N For Review and Comment ? Approved as Noted ? Forward to Subcontractor REMARKS: Please let me know if you have any questions or need any additional information Thank you COPY TO: 80499.00.RA - A SIGNED: 41312 w a ! I > -y A r Office Use Only: Corps action ID no. DWQ project no. Form Version 1.3 Dec 10 2008 Pre-Construction Notification (PCN) Form A. Applicant Information 1. Processing 1 a. Type(s) of approval sought from the Corps: ®Section 404 Permit El Section 10 Permit 1b. Specify Nationwide Permit (NWP) number: 13 or General Permit (GP) number: 1c. Has the NWP or GP number been verified by the Corps? ® Yes ? No 1 d. Type(s) of approval sought from the DWQ (check all that apply): ® 401 Water Quality Certification - Regular ? Non-404 Jurisdictional General Permit ? 401 Water Quality Certification - Express ? Riparian Buffer Authorization 1e. Is this notification solely for the record because written approval is not required? For the record only for DWQ 401 Certification: ? Yes ® No For the record only for Corps Permit: ? Yes ® No 1f. Is payment into a mitigation bank or in-lieu fee program proposed for mitigation of impacts? If so, attach the acceptance letter from mitigation bank or in-lieu fee program. ? Yes ® No 1 g. Is the project located in any of NC's twenty coastal counties. If yes, answer 1 h below. ? Yes ® No 1 h. Is the project located within a NC DCM Area of Environmental Concern (AEC)? ? Yes ® No 2. Project Information 2a. Name of project: Town of Newland - Flood By-Pass Channel & Pineola Street Floodplain Improvements for NCDENR - Division of Water Resources 2b. County: Avery 2c. Nearest municipality / town: Newland 2d. Subdivision name: N/A 2e. NCDOT only, T.I.P. or state project no: N/A Mu I Lg uvy L9M 3. - Owner Information DEC 1 4 2ong 3a. Name(s) on Recorded Deed: See Attached List of Landowners 3b. Deed Book and Page No. WERMIMANDSTMM7ERBRANCH 3c. Responsible Party (for LLC if applicable): 3d. Street address: 3e. City, state, zip: 3f. Telephone no.: 3g. Fax no.: 3h. Email address: Page I of 12 PCN Form - Version 1.3 December 10, 2008 Version 4. Applicant Information (if different from owner) 4a. Applicant is: ? Agent ® Other, specify: Municipality 4b. Name: Ms. Brenda Pittman (Town Manager) 4c. Business name (if applicable): Town of Newland 4d. Street address: 301 Cranberry Street 4e. City, state, zip: Newland, North Carolina 28657 4f. Telephone no.: (828) 733-2023 4g. Fax no.: (828) 733-2069 4h. Email address: townmgr@newlandgov.com 5. Agent/Consultant Information (if applicable) 5a. Name: David Kiker, PE 5b. Business name (if applicable): WK Dickson & Co., Inc. 5c. Street address: 720 Corporate Center Drive 5d. City, state, zip: Raleigh, North Carolina 27607 5e. Telephone no.: 919-782-0495 5f. Fax no.: 919-782-9672 5g. Email address: djkiker@wkdickson.com Page 2 of 12 PCN Form - Version 1.3 December 10, 2008 Version B. Project Information and Prior Project History 1. Property Identification 1 a. Property identification no. (tax PIN or parcel ID): See Attached List Latitude: 36.088889 1 b. Site coordinates (in decimal degrees): Longitude: - 81.923889 (DD.DDDDDD) (-DD.DDDDDD) 1 c. Property size: 4.73 acres 2. Surface Waters 2a. Name of nearest body of water (stream, river, etc.) to North Toe River proposed project: 2b. Water Quality Classification of nearest receiving water: WS-V; Tr 2c. River basin: HUC 06010108 French Broad 3. Project Description 3a. Describe the existing conditions on the site and the general land use in the vicinity of the project at the time of this application: Located in the Town of Newland. Surrounding area is developed light industrial and retail business. Floodway is lined with large riprap and historic floodplain has been filled to accommodate businesses. 3b. List the total estimated acreage of all existing wetlands on the property: No wetlands exist within the project boundary. Verified by US Corps of Engineers. 3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property: 1,600 linear feet. 3d. Explain the purpose of the proposed project: The Newland by-pass channel and Pineola Street floodplain improvements project will reduce future flooding in the Town by increasing floodplain capacity and hydraulic effiency along the North Toe River. The project will also improve channel stability with natural channel design structures and bank protection. 3e. Describe the overall project in detail, including the type of equipment to be used: 1. Install a 60-foot wide, 536-foot long grass-lined earthen by-pass channel to divert flows around a constriction area. 2. Install floodplain benches along the left and right overbanks in the vicinity of Pineola Street. These floodplain improvements also include an asphalt greenway trail in the right overbank which ties into an existing park. 3.lnstall a new headwall with a beveled upstream face at the Pineola Street (U.S. Highway 194) box culverts. 4. Install a 43 linear feet footbridge upstream of Pineola Street to tie-in the proposed greenway trail to the existing upstream park. The bridge superstructure is a pre-fabricated half truss with timber deck. 5. Install approximately 400 linear feet of 10-inch and approximately 380 linear feet of 12-inch diameter HDPE that captures the Newland Shopping Center roof leaders and diverts flows into a recenetly constructed stormwater treatement facility. 6. Install 27 If of boulder toe protection at the proposed footbridge to help direct flows off the right bank that is currently eroding. 7. Collect stormwater from the Newland shopping center and divert through an extended detention wetland. 8. Replace existing rip-rap with boulders to improve bank stability and habitat. 9. Planting tree clumps placed at pools. Typical earthmoving equipment will be utilized to construct this project. Page 3 of 12 PCN Form - Version 1.3 December 10, 2008 Version 4. Jurisdictional Determinations 4a. Have jurisdictional wetland or stream determinations by the Corps or State been requested or obtained for this property / project (including all prior phases) in the past? ®Yes ? No ? Unknown Comments: A review by the US Army Corps of Engineers of the project area for wetlands was requested. The USACE verbally verified that no wetlands are within the project area. 4b. If the Corps made the jurisdictional determination, what type ? Preliminary ®Final of determination was made? 4c. If yes, who delineated the jurisdictional areas? Agency/Consultant Company: Name (if known): Amanda Jones - USACE Other: 4d. If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation. USACE June 15, 2008 5. Project History 5a. Have permits or certifications been requested or obtained for ? Yes ® No ? Unknown this project (including all prior phases) in the past? 5b. If yes, explain in detail according to "help file" instructions. 6. Future Project Plans 6a. Is this a phased project? ? Yes ® No 6b. If yes, explain. Page 4 of 12 PCN Form - Version 1.3 December 10, 2008 Version C. Proposed Impacts Inventory 1. Impacts Summary I a. Which sections were completed below for your project (check all that apply): ? Wetlands ® Streams - tributaries ? Buffers ? Open Waters ? Pond Construction 2. Wetland Impacts If there are wetland impacts proposed on the site, then complete this question for each wetland area impacted. 2a. 2b. 2c. 2d. 2e. 2f. Wetland impact Type of jurisdiction number - Type of impact Type of wetland Forested (Corps - 404, 10 Area of impact Permanent (P) or (if known) DWQ - non-404, other) (acres) Temporary T W1 ? P ? T ? Yes ? Corps ? No ? DWQ W2 ? P ? T ? Yes ? Corps ? No ? DWQ W3 ? P ? T ? Yes ? Corps ? No ? DWQ W4 ? P M T ? Yes ? Corps ? No ? DWQ W5 ? P ? T ? Yes ? Corps ? No ? DWQ W6 ? P ? T ? Yes ? Corps ? No ? DWQ 2g. Total wetland impacts 2h. Comments: 3. Stream Impacts If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site, then complete this question for all stream sites impacted. 3a. 3b. 3c. 3d. 3e. 3f. 3g. Stream impact Type of impact Stream name Perennial Type of jurisdiction Average Impact number - (PER) or (Corps - 404, 10 stream length Permanent (P) or Temporary (T) intermittent DWQ - non-404, width (linear (INT)? other) (feet) feet) S1 ? P ®T Boulder Toe Set at Current Toe North Toe River ® PER INT El ® Corps ? DWQ 55 67 S2 ®P ? T Boulder Toe Set Off Current Toe North Toe River ® PER ? INT ® Corps ? DWQ 33 344 S3 ®P ? T Boulder Toe Set Off Current Toe North Toe River ® PER [:1 INT ® Corps F] DWQ 35 54 S4 ® P ? T Boulder Toe Protection North Toe River ® PER El INT ® Corps ? DWQ 35 15 Concrete S5 ® P ? T Abutment Constructed for North Toe River ® PER ? INT ® Corps ? DWQ 35 10 Footbridge S6 ? P F] T ER ? : ? Corps ? T 1N ? DWQ 3h. Total stream and tributary impacts 490 3i. Comments: Page 5 of 12 PCN Form - Version 1.3 December 10, 2008 Version 4. Open Water Impacts If there are proposed impacts to lakes, ponds, estuaries, tributaries, sounds, the Atlantic Ocean, or any other open water of the U.S. then individually list all open water impacts below. 4a. 4b. 4c. 4d. 4e. Open water Name of waterbody impact number - (if applicable) Type of impact Waterbody type Area of impact (acres) Permanent (P) or Temporary T 01 ?P?T 02 ?P?T 03 ?P?T 04 ?P?T 4E Total open water impacts 4g. Comments: 5. Pond or Lake Construction If and or lake construction proposed, then complete the chart below. 5a. 5b. 5c. 5d. 5e. Wetland Impacts (acres) Stream Impacts (feet) Upland Pond ID Proposed use or purpose (acres) number of pond Flooded Filled Excavated Flooded Filled Excavated Flooded P1 P2 5f. Total 5g. Comments: 5h. Is a dam high hazard permit required? ? Yes ? No if yes, permit ID no: 5i. Expected pond surface area (acres): 5j. Size of pond watershed (acres): 5k. Method of construction: 6. Buffer Impacts (for DWQ) If project will impact a protected riparian buffer, then complete the chart below. If yes, then individually list all buffer impacts below. If an impacts require mitigation, then you MUST fill out Section D of this form. 6a. ? Neuse ? Tar-Pamlico ? Other: Project is in which protected basin? ? Catawba ? Randleman 6b. . 6d. 6e. 6f. 6g. Buffer impact number - FReason Buffer Zone 1 impact Zone 2 impact Permanent (P) or for Stream name mitigation (square feet) (square feet) Temporary T act required? B1 ?P?T - ?Yes ? No B2 ?P?T ?Yes ? No B3 ?P?T ?Yes ? No 6h. Total buffer impacts 6i. Comments: Page 6 of 12 PCN Form - Version 1.3 December 10, 2008 Version D. Impact Justification and Mitigation 1. Avoidance and Minimization 1a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project. Bypass elevation designed above the ordinary high water mark, natural material used (granite boulders) for stabilization and J- hook structures, and the construction footprint in channel was reduced to minimum necessary to meet stabilization criteria. 1 b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques. Work will be staged from downstream to upstream. Contractor to work from top of bank or build a bench to work from. 2. Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State 2a. Does the project require Compensatory Mitigation for impacts to Waters of the U.S. or Waters of the State? ? Yes ® No 2b. If yes, mitigation is required by (check all that apply): ? DWQ ? Corps 2c. If yes, which mitigation option will be used for this project? ? Mitigation bank ? Payment to in-lieu fee program ? Permittee Responsible Mitigation 3. Complete if Using a Mitigation Bank 3a. Name of Mitigation Bank: 3b. Credits Purchased (attach receipt and letter) Type Quantity 3c. Comments: 4. Complete if Making a Payment to In-lieu Fee Program 4a. Approval letter from in-lieu fee program is attached. ? Yes 4b. Stream mitigation requested: linear feet 4c. If using stream mitigation, stream temperature: ? warm ? cool ?cold 4d. Buffer mitigation requested (DWQ only): square feet 4e. Riparian wetland mitigation requested: acres 4f. Non-riparian wetland mitigation requested: acres 4g. Coastal (tidal) wetland mitigation requested: acres 4h. Comments: 5. Complete if Using a Permittee Responsible Mitigation Plan 5a. If using a permittee responsible mitigation plan, provide a description of the proposed mitigation plan. Page 7 of 12 PCN Form - Version 1.3 December 10, 2008 Version 6. Buffer Mitigation (State Regulated Riparian Buffer Rules) - required by DWQ 6a. Will the project result in an impact within a protected riparian buffer that requires buffer mitigation? ? Yes ® No 6b. If yes, then identify the square feet of impact to each zone of the riparian buffer that requires mitigation. Calculate the amount of mitigation required. Zone 6c. Reason for impact 6d. Total impact (square feet) Multiplier 6e. Required mitigation (square feet) Zone 1 3 (2 for Catawba) Zone 2 1.5 6f. Total buffer mitigation required: 6g. If buffer mitigation is required, discuss what type of mitigation is proposed (e.g., payment to private mitigation bank, permittee responsible riparian buffer restoration, payment into an approved in-lieu fee fund). 6h. Comments: Page 8 of 12 PCN Form - Version 1.3 December 10, 2008 Version E. Stormwater Management and Diffuse Flow Plan (required by DWQ) 1. Diffuse Flow Plan 1 a. Does the project include or is it adjacent to protected riparian buffers identified ? Yes ® No within one of the NC Riparian Buffer Protection Rules? 1 b. If yes, then is a diffuse flow plan included? If no, explain why. Comments: ? Yes ? No 2. Stormwater Management Plan 2a. What is the overall percent imperviousness of this project? 5.3% 2b. Does this project require a Stormwater Management Plan? ? Yes ® No 2c. If this project DOES NOT require a Stormwater Management Plan, explain why: Project is located outside the NCDWQ mapped outstanding resource waters and high quality waters. The project results in a net loss of impervious surface. 2d. If this project DOES require a Stormwater Management Plan, then provide a brief, narrative description of the plan: ? Certified Local Government 2e. Who will be responsible for the review of the Stormwater Management Plan? ? DWQ Stormwater Program ? DWQ 401 Unit 3. Certified Local Government Stormwater Review 3a. In which local government's jurisdiction is this project? ? Phase II 3b. Which of the following locally-implemented stormwater management programs ? NSW apply (check all that apply): ? USMP ? Water Supply Watershed ? Other: 3c. Has the approved Stormwater Management Plan with proof of approval been ? Yes ? No attached? 4. DWQ Stormwater Program Review ? Coastal counties 4a. Which of the following state-implemented stormwater management programs apply El HQW ? ORW (check all that apply): ? Session Law 2006-246 ? Other: 4b. Has the approved Stormwater Management Plan with proof of approval been attached? ? Yes ? No 5. DWQ 401 Unit Stormwater Review 5a. Does the Stormwater Management Plan meet the appropriate requirements? ? Yes. ? No 5b. Have all of the 401 Unit submittal requirements been met? ? Yes ? No Page 9 of 12 PCN Form - Version 1.3 December 10, 2008 Version F. Supplementary Information 1. Environmental Documentation (DWQ Requirement) 1 a. Does the project involve an expenditure of public (federal/state/local) funds or the ® Yes ? No use of public (federal/state) land? 1 b. If you answered "yes" to the above, does the project require preparation of an environmental document pursuant to the requirements of the National or State ? Yes ® No (North Carolina) Environmental Policy Act (NEPA/SEPA)? 1c. If you answered "yes" to the above, has the document review been finalized by the State Clearing House? (If so, attach a copy of the NEPA or SEPA final approval letter.) ? Yes ? No Comments: 2. Violations (DWQ Requirement) 2a. Is the site in violation of DWQ Wetland Rules (15A NCAC 2H .0500), Isolated Wetland Rules (15A NCAC 2H .1300), DWQ Surface Water or Wetland Standards, ? Yes ® No or Riparian Buffer Rules (15A NCAC 2B .0200)? 2b. Is this an after-the-fact permit application? ? Yes ® No 2c. If you answered "yes" to one or both of the above questions, provide an explanation of the violation(s): 3. Cumulative Impacts (DWQ Requirement) 3a. Will this project (based on past and reasonably anticipated future impacts) result in ? Yes ® No additional development, which could impact nearby downstream water quality? 3b. If you answered "yes" to the above, submit a qualitative or quantitative cumulative impact analysis in accordance with the most recent DWQ policy. If you answered "no," provide a short narrative description. Project purpose is flood reduction. Areas affected are already developed or have resdential homes that have been purchased through the FEMA buyout program. 4. Sewage Disposal (DWQ Requirement) 4a. 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. N/A Page 10 of 12 PCN Form - Version 1.3 December 10, 2008 Version 5. Endangered Species and Designated Critical Habitat (Corps Requirement) 5a. Will this project occur in or near an area with federally protected species or habitat? F1 Yes ED No 5b. Have you checked with the USFWS concerning Endangered Species Act P ®Y ? No 5c. If yes, indicate the USFWS Field Office you have contacted. ? Raleigh ® Asheville 5d. What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical Habitat? The US FWS web site listing protetected species and the Natural Heritage program data base was reviewed for element occurences. No habitat for listed protected species in Avery County is present. No element occurences within or near the project area are recorded. The project area does not contain any Designated Critical Habitat. An official comment by the USFWS did not indicate any concerns regarding protected species. Comments are attached. 6. Essential Fish Habitat (Corps Requirement) 6a. Will this project occur in or near an area designated as essential fish habitat? ? Yes ® No 6b. What data sources did you use to determine whether your site would impact Essential Fish Habitat? South Atlantic Habitat and Ecosystem IMS 7. Historic or Prehistoric Cultural Resources (Corps Requirement) 7a. Will this project occur in or near an area that the state, federal or tribal governments have designated as having historic or cultural preservation st t N i ? Yes N a us (e.g., at onal Historic Trust designation or properties significant in o North Carolina history and archaeology)? 7b. What data sources did you use to determine whether your site would impact historic or archeological resources? State Historic Preservation Office (ER 08-1269) 8. Flood Zone Designation (Corps Requirement) 8a. Will this project occur in a FEMA-designated 100-year floodplain? ® Yes ? No 8b. If yes, explain how project meets FEMA requirements: As part of the project, a Conditional Letter of Map Revision (CLOMR) has been submitted to FEMA to address the modification to the existing regulatory floodway. 8c. What source(s) did you use to make the floodplain determination? FEMA FIRM Panel 1836J dated December 2 2008 for , the Town of Newland, North Carolina (CID# 370012) and Avery County, North Carolina (CID #370010). Ms. Brenda Pittman ?a?ti?dtc? Applicant/Agent's Printed Name Applicant/Agent's Signature Date (Agent's signature is valid only if an authorization letter from the applicant is rovieM Page ) I of 12 PCN Form - Version 1.3 December 10, 2008 Version Attachment 1 Figures ,. , T5 C Town of Elk Park usHWV t`? Ago S F7 hy ` I' N 1 y t, \ l ? X94 a y n ^rr I 1 Town of Banner Elk Sugar Mountain y?G L I u <; , ' rrr C _ D c i^ Grandfather Village \NY us V4 221 X15 va, ti } Town of Newland A N Town of Crossnore Figure 1 Town of Newland Flood By-Pass Channel & Pineola Street Floodplain Improvements Vicinity Map 0 0.5 1 2 Ed 1_?_E Miles 1 inch = 2 miles 037 x° g Ill i F. 3 r 3 ?• '?• ? ?, t li cz }Z Cliff /_10 ? , ; i?j/ ' ?. 't a ;...? •. ' ? .?? fA ) ?. ,? ?. / V By-Pass Channel Site ?• ` _? ,• f/f `` M,,k r1ic-,tat,u6. fl,itlPV? AN T, C? _Oj T ?• t n , ', f (I ? ntAln .10 1 Pineola Street Floodplain r" ?,? • ,'f' Improvements Site 27 ?•, Figure 2 ?? ?+ r ,rrA l' j rye r c r.5r. ; • ?.. Town of Newland Flood By-Pass Channel & Pineola 4 _ Street Floodplain Improvements f ." ^+ t Mitler Q ` USGS p Cow Gemp Gap Q {f 0 1,000 2,000 4,000 ~ ?V - ??` •t f; ' 1, ?? , . Feet 1 inch = 2,000 feet 1 - >' rpt -.. � �• ir- � i+Rd a° 00 , r i.yS� n0 _a p 0 m �OW iE a . 0 lo�l Z +rte.. !)!1� $F � �j � ,.s"` i a 'dam ♦ f . .�5i�! • t dr1 3 7 0 A" CL pyo w i %17 ID t ID m t 1 z � v � . � � � ., ,,�..r,�ac +► cR4Ne R_ �yt` SCyU4� / SCHU4� sT. ' L� ? �' a • y • 14 i� O O O O � O •� _ II 00 N al P1 Oy, ai Z ro p O Qp 3 < C Yk T ZO ID A (D O M 3 M (D 7 O Lp IIS a so µ C., cL =,n j 7 0 _. to - >' rpt -.. � �• ir- � i+Rd a° 00 , r i.yS� n0 _a p 0 m �OW iE a . 0 lo�l Z +rte.. !)!1� $F � �j � ,.s"` i a 'dam ♦ f . .�5i�! • t dr1 3 7 0 A" CL pyo w i %17 ID t ID m t 1 z � v � . � � � ., ,,�..r,�ac +► cR4Ne R_ �yt` SCyU4� / SCHU4� sT. ' L� ? �' a • y • 14 i� �� w• �AI� � � A � iso U 4 � w LO ca CU d O o o c6 y X C 0 o a LL m -`o- to . { �l. ` ' �q `,� R •' n max. �� •• _. • m E co m 1,, ,, b6L �MNJ1s b70, G E E , ♦♦ '``a ♦ •o a � E cu aa) viii ♦� - _� � � ii C cLa 41iii sill = a \ iii ,�O + ♦ , � � �� cu CL m a R co EE mcu LLo Of o L CD Attachment 2 Project Overview Newland Bypass Channel Project Overview In September 2004, remnants of Tropical Storm Frances and Hurricane Ivan caused severe flooding in western North Carolina. One area that experienced some of the worst flooding was the Town of Newland. As many as thirty-five (35) businesses and six (6) residential structures experienced flooding. Additionally, numerous roads in the downtown area overtopped. As a result of the severe flooding experienced in this area, the State of North Carolina through Senate Bill 7 developed a planning level report which identified a series of projects intended to alleviate future flooding. One of these projects is the Newland By-Pass Project. The proposed project will reduce 100-year flood elevations by approximately 1.5 feet by constructing a by-pass channel and creating a floodplain bench for floodwaters to access. The North Carolina Department of Environmental and Natural Resources - Division of Water Resources retained WK Dickson (WKD) to further evaluate the existing flooding potential in Newland and to make recommendations for reducing it. The focus of this evaluation is large scale flooding along the North Toe River on the downstream side of Newland. Flooding in the downtown area is exacerbated by the following three downstream floodplain conditions: High channel banks that approach 12 to 15 feet in height for the first 300 feet downstream of Pineola Street (State Highway 194). The banks approach this height due to fill placed to raise the rear of the commercial lots adjacent to the channel. Natural bank heights approach 4 to 5 feet for the area immediately downstream of Town. Pineola Street (State Highway 194) roadway crossing with four 11-foot by 84oot reinforced concrete box culverts (RCBCs). A natural floodplain constriction located approximately 1500 feet downstream of Pineola Street (State Highway 194). This floodplain constriction is vulnerable to debris accumulation and also elevations to be higher than would be expected. Debris accumulation approached 6 feet in height after remnants of Hurricane Ivan. causes upstream flood on the right floodplain As shown on the separately attached set of design plans, the following will make up the main parts of the project: • Install a 60-foot wide, 536-foot long grass-lined earthen by-pass channel to divert flows around the area currently constricting flood flows. This by-pass channel is located approximately 1,400 feet downstream of Pineola Street (US Highway 194). • Install a floodplain bench along the left and right overbank in the vicinity of Pineola Street. These floodplain improvements also include 810 linear feet of greenway trail in the right overbank which ties together two existing parks that are located on either side of Pineola Street. The purpose of these floodplain benches is to lower the tailwater elevation on the Pineola Street culverts to improve hydraulic performance and also reduce upstream flood elevations. • Retrofit the existing headwall with a beveled upstream face at the Pineola Street (Highway 194) box culverts. Retrofitting a beveled front face to the concrete headwall will reduce energy losses through the culvert and will reduce upstream water surface elevations. • Installing a 43-feet long pedestrian steel truss footbridge that ties in the existing upstream park with the proposed greenway and existing downstream park. • Plant trout-habitat-friendly trees on the south bank of the channel to provide shade for trout. Pineola Street Flooding from Hurricane Ivan • Install two rock j-hook vanes upstream of Rneola Street to provide bank protection at the proposed footbridge and greenway trail. In both areas the river is causing the right bank to undergo erosion of the toe of the bank. • Install 387 linear feet of 12" diameter PVC closed drainage system to collect runoff from the Newland Shopping Center. This new closed drainage system will outfall into the recently constructed extended detention wetland designed to treat water quality. • Install 274 linear feet of 8" diameter PVC closed drainage system to collect runoff from the proposed greenway. • Extend Cranberry Street approximately 400 feet with a 10 feet wide gravel road that will provide access for the private property owners who would be cutoff by the termination of Old Railroad Street. • Replace the existing undersized closed drainage system at Cranberry Street with 294 linear feet of 42" diameter RCP and 126 linear feet of 48" RCP. The existing closed drainage system does not meet minimum NCDOT design standards for a local collector road. Currently the road overtops approximately 20 times per year and does not meet minimum NCDOT design standards. The project will provide both channel stability and flood reduction benefits in the downtown area. The more severely flooded areaswill experience 1 to 2 foot reductions in the 100-year flood elevations. As an added benefit, the project will provide a greenway access connecting the two parks located on either side of Rineola Street. The project is currently in final design with an anticipated date for construction to begin in April 2010. Q b° `�' . �`� •r `" e t a elm � � ' J, _ L r (fes it ,. � " �. 1^°4 • 1, • m 2 `� Attachment 3 Landowners a? T U) U) U Un - ? in ? a a ns ) a) -6 75 -r .0 c M 'a 0 0 0 0 a? _0 o a . c Co o o = = - o > c Q «) () c = fr Ir ? ? M a 0 CL CE It( Do rn 0 N ? 0 0 (D C? CD O m m O O O co co mo ( N N ( D p CC) O ( O co 00 Y Y N N M O N (D - .. > O ( O N OS LO O O > N O ^ ^ r n O CO Ln co c O O ' O O O CO OD n O co 00 "t 00 O O OD N N O N N N O 00 ? c N 0 0 0 S r,- 0 0 c 0 c 0 N M O V co C6 w M O 0 f? co OD M aD (D C\j M Ch O N OS f0 0 LO r r 00 r r -,t L(1 v r? O O O O O O O r 0 N _ O N O O 0 O O O O O N O N r, LO N m O O m co LO 70 0 Co m m O c0 c0 O O 0 0 O O 0 0 0 0 0 0 0 0 0 U N r r N r r N N N N CE aD 0) N V O) r M It M N 0 CO r r O 00 O O OD I- (D O O r- (D r g P2 N co (O N O O O (O co O) r Nt N N ?t co (D M r- M IT v N v co ? co It M N C ? ? N Ln ? 0 co ? co ? ao 00 00 00 00 0 0) (D O CD (D O O O O (O O CD O M co M 00 CM O CO O CO co Cl) O M 00 CO CD CO c0 CO 00 CO 00 M 00 Cl) 00 E c" d co ca a a) U co C: Z O O Q O O U LL Y cc (D co ? c o a c 3 c W c 0 0 2 >1 N ? a3) Z - c c - 0 a E a E - . - r U co co Z Z5 cu (D CL O M ? d CO 0 0 _ LL O F- H c 3 0 N M 't LO co r co 0) O r Attachment 4 Correspondance JUN 1 9 2008 North Carolina Department of Cultural Resources State Historic Preservation Office Peter B. Sandbeck, Administrator Michael F. Easley, Governor Lisbeth C. Evans, Secretary jeffrey j. Crow, Deputy Secretary June 16, 2008 David Kiker WK Dickson 720 Corporate Center Drive Raleigh, NC 27607 Re: Flood By-Pass Channel, Newland, Avery County, ER 08-1269 Dear Mr. Kiker: Thank you for your letter of May 19, 2008, concerning the above project. We have determined that the project as proposed will not affect any historic structures. Office of Archives and History Division of Historical Resources David Brook, Director There are no known xecorded archaeological sites within the project boundaries. However, the project area has never been systematically surveyed to determine the location or significance of archaeological resources. Based on the topogtaphic and hydrological situation, there is a high probability for the presence of prehistoric or historic archaeological sites. We recommend that a comprehensive survey be conducted by an experienced archaeologist to identify and evaluate the significance of archaeological remains that may be damaged or destroyed by the proposed project. Potential effects on unknown resources must be assessed prior to the initiation of construction activities. A list of archaeological consultants who have conducted or expressed an interest in contract work in North Carolina is available at www arch_drr,state.ne.us/consults.htm. The archaeologists listed, or any other experienced archaeologist, may be contacted to conduct the recommended survey. The above comments are made pursuant to Section 106 of the National Historic Preservation Act and the Advisory Council on Historic Preservation's Regulations for Compliance with Section 106 codified at 36 CFR Part 800. Thank you for your cooperation and consideration. If you have questions concerning the above comment, please contact Renee Gledhill-Earley, environmental review coordinator, at 919/807-6579. In all future communication concerning this project, please cite the above referenced tracking number. Sincerely, eter Sandbeck L.ocatiow 109 Cast joacs Street, Raleigh NC 27601 Mailing Address: 4617 Mail Service Center, Raleigh NC 27699-4617 Telephone/Fat: (919) 807-6570/807.6599 oft r community introstruc November 23, 2009 ture consultants Attention Field Supervisor Mr. Allen Ratzlaff US Fish and Wildlife Service Asheville Field Office 160 Zillicoa Street Asheville, North Carolina 28801-1082 Subject: Environmental Scoping Request Newland Bypass Channel Project and Pineola Street Floodplain Improvements Avery County, City of Eden, NC. Dear Mr. Ratzlaff, On behalf of the Town of Newland (Owner), WK Dickson is requesting a review of the above referenced project for the presence of any federally protected species that may be affected by the proposed project. The project is located in the Town of Newland on the North Toe River starting above Pineola Street (State Highway 194) and the confluence with Kentucky Creek (Figure 1).. The project is in the French Broad River Basin (HUC 06010108). Project Information The purpose of this project is a reduction in large scale flooding along the North Toe River downstream of the Town of Newland (Figure 2). The project is intended to alleviate the severe flooding experienced by the Town during heavy rains, as was the case during Tropical Storm Frances and the remnants of Hurricane Ivan. In September 2004, these storms flooded thirty-five (35) businesses and six (6) residential structures in the Town. This project focuses on reducing upstream flooding in the downtown business district. The proposed project is located in the Town of Newland and much of the surrounding area is developed land (Figure 3). The channel in the project area has been altered through filling of the floodplain and constriction of the banks. The proposed project consists of creating a flood bypass channel above the ordinary high water mark downstream of the town and stabilizing approximately 600 linear feet of stream bank through construction of boulder toes and in-stream rock vanes (Figure 3). Along the floodplain, a paved walking trail and a raised footbridge will be constructed to connect two town parks. Additional drainage modifications outside of the stream channel are also proposed, including culvert upgrades and stormwater collection and diversion into a stormwater detention basin. When completed, the project will improve stream flows and significantly reduce flooding in the Newland business district. The in-stream headwall at Pineola Street will be modified to include a new concrete beveled inlet to improve hydraulic efficiency. The design for the project is being developed t,rt,o 0 (,E concurrently with environmental documentation and in compliance with applicable environmental laws and regulations. This process offers you the opportunity to identify site-specific conditions to be addressed prior to completion of the design. Information was gathered regarding vegetation cover, land use, the location of jurisdictional waters of the United States, and potential protected species habitat. The US Fish and Wildlife Service (USFWS) web site list of protected species for Avery County (Table 1), the North Carolina Natural Heritage Program (NHP) database, and US Geologic Survey (USGS) 7.5' topographic quadrangles (Figure 2) were reviewed for information regarding the habitat and presence of protected species in the area. Based on the USFWS and NHP databases, there are no known occurrences of the eight federally protected species listed for Avery County within or near the project area. Table 1. Protected Species Known From Avery County Common Name Scientific name Federal Status State Status Vertebrate Northern saw-whet owl (Southern Appalachian population) Aegolius acadicus pop. 1 FSC T Bog turtle Clemmys muhlenbergii T (S/A) -- Virginia big-eared bat Corynorhinus townsendii virginianus E E Hellbender Cryptobranchus alleganiensis FSC SC Pygmy salamander Desmognathus wrighti FSC SR Mountain blotched chub** Erimystax insignis eristigma FSC -- Carolina northern flying squirrel Glaucomys sabrinus coloratus E E Red crossbill (Southern Appalachian) Loxia curvirostra FSC SC Southern rock vole Microtus chrotorrhinus carolinensis FSC SC Eastern small-footed bat Myotis leibii FSC SC Allegheny woodrat Neotoma magister FSC SC Southern Appalachian black-capped chickadee Poecile atricapillus practicus FSC SC Southern water shrew Sorex palustris punctulatus FSC SC Yellow-bellied sapsucker (Southern Appalachian population) Sphyrapicus varius appalachiensis FSC SC Appalachian cottontail Sylvilagus obscurus FSC SR Appalachian Bewick's wren* Thryomanes bewickii altus FSC E Invertebrate Grayson crayfish ostracod* Ascetocythere cosmeta FSC Spruce-fir moss spider Microhexura montivaga E SR Diana fritillary (butterfly) Speyeria diana FSC Regal fritillary (butterfly)* Speyeria idalia FSC SR Vascular Plant: Common Name Scientific name Federal Status State Status Fraser fir Abies fraseri FSC -- Roan False Goat's-beard* Astilbe crenatiloba FSC -- Mountain bitter cress Cardamine clematitis FSC SR-T Cuthbert turtlehead Chelone cuthbertii FSC SR-L Tall larkspur* Delphinium exaltatum FSC E-SC Bent avens Geum geniculatum FSC T Spreading avens Geum radiatum E E-SC Roan mountain bluet Hedyotis purpurea var. montana E -- Butternut Juglans cinerea FSC -- Heller's blazing star Liatris helleri T T-SC Gray's lily Lilium grayi FSC T-SC Large-leaved Grass-of-Parnassus* Parnassia grandifolia FSC T Bog blue grass Poa paludigena FSC E Gray's saxifrage Saxifraga caroliniana FSC -- Blue Ridge goldenrod Solidago spithamaea T E a liverwort Sphenolobopsis pearsonii FSC -- Lichen Rock gnome lichen Gymnoderma lineare E T a liverwort Plagiochila sullivantii var. sullivantii FSC SR-T a liverwort* Plagiochila virginica var. caroliniana FSC SR-T E = Endangered E-SC = Endangered - Special Concern FSC = Federal Species of Concern SC = Special Concern SR-T = Significantly Rare - Throughout T = Threatened T - SC = Threatened- Special Concern * = Historic * * = Occurrence is Probable/potential Sources: US Fish and Wildlife Service Updated: 31 January 2008 Natural Heritage Program Database Updated: 7 August, 2009 Thank you in advance for your timely response and cooperation. Return any comments to my attention at the address below. Please feel free to contact me with any questions that you may have concerning this project through phone or e-mail. Sincerely, George Lankford Project Scientist WK. Dickson & Co., Inc. 720 Corporate Center Drive Raleigh, NC 27607 glankford@wkdickson.com 919-782-0495 CC: Darren England, NCDENR-Division of Water Resource, Project Manager Keith Hoilman, Town of Newland, Public Works Director Dave Kiker, PE, WK Dickson, Project Manager File: 80499.00.RA I Attachments: Figure 1 Vicinity Map Figure 2 Overview Map Figure 3 Project Map 4 QP?S?,EH OP HF United States Department of the Interior N 9 ? a FISH AND WILDLIFE SERVICE ?'4aCH s Asheville Field Office 160 Zillicoa Street Asheville. North Carolina 2$$01 December 9, 2009 Mr. George Lankford W.K. Dickson & Co., Inc. 720 Corporate Center Drive Raleigh, North Carolina 27607 Dear Mr. Lankford: Subject: Proposed Newland Bypass Channel Project and Pineola Street Floodplain Improvements, Newland, Avery County, North Carolina We received your letter of November 23, 2009, in which you requested our comments on the subject project. The following comments are provided in accordance with the provisions of the National Environmental Policy Act; Fish and Wildlife Coordination Act, as amended (16 U.S.C. 661-667e); Migratory Bird Treaty Act, as amended (16 U.S.C. 703); and section 7 of the Endangered Species Act of 1973, as amended (16 U.S.C. 1531-1543) (Act). According to your letter, the Town of Newland (Town) is proposing the subject flood prevention projects on the North Toe River starting above Pineola Street (State Highway 194) and the confluence with Kentucky Creek. The purpose of this project is to reduce large scale flooding along the North Toe River experienced by the Town during heavy rains. In September 2004, storms flooded thirty-five businesses and six residential structures in the Town. This project focuses on reducing flooding in the downtown business district. The proposed project is located on the southwest side of the Town along the North Toe River. Most of the surrounding area (except on the west side on the North Toe River) has been developed. The North Toe River in the project area has been altered through filling of the floodplain and constriction of the banks. The project includes creating a flood bypass channel above the ordinary high water mark downstream of the town and "stabilizing" about 600 linear feet of stream bank through construction of boulder toes and in-stream rock vanes. Along the floodplain, a paved walking trail and a raised footbridge will be constructed to connect two town parks. Additional drainage modifications outside of the stream channel are also proposed, including culvert upgrades and stormwater collection and diversion into a stormwater detention basin. The in-stream headwall at Pineola Street will be modified to include a new concrete beveled inlet to improve hydraulic efficiency. We have several concerns with this project, not the least of which is the fact that most of the southern end of the Town of Newland is built within the 100-year floodplain and will likely remain in the floodplain even after the project is completed. The loss of riparian habitat and extensive amount of impervious surface the Town has placed in the floodplain, along with the channelization and constriction of the North Toe River channel, are exacerbating the flooding that would naturally occur in the area, i.e. the floodplain. Continued development without proper stormwater management and any future development within the 100-year floodplain will only lead to future flooding problems not addressed by the subject project and may render the subject project inadequate. We strongly recommend that consideration be given to using the funds intended for this project to relocate businesses and residential structures outside of the 100-year floodplain and that floodplain restoration be initiated. As you are aware, Executive Order 11988 requires federal agencies (and their designated nonfederal representatives) to consider and protect floodplain functions. We believe the examples of flooding in this area provided in your letter highlight the importance of avoiding the long- and short-term impacts associated with the occupancy and modification of floodplains and that we should avoid any direct or indirect support of floodplain development. Additionally, because the project occurs within an upper drainage of the Tennessee River Valley, a Nationwide Section 26a Permit from the Tennessee Valley Authority (TVA) will be needed for this project. Section 26a of the TVA Act contains regulations regarding both the location of construction projects and the types of activities carried out within the Tennessee River or any of its tributaries. A tributary is defined as any watercourse whose contents, if not obstructed, diverted, or consumed, will ultimately flow into the Tennessee River; thus, TVA's jurisdiction extends to the limits of the Tennessee River watershed. Section 26a is designed to ensure that construction along the shoreline and in waters of the Tennessee River system does not have a negative effect on the agency's management of the river system or its ability to carry out what the TVA Act describes as the "unified development and regulation of the Tennessee River." By copy of this letter, we are notifying TVA about this project. Similarly, the placement of boulder toes and rock vanes in the North Toe River will require a permit from the U.S. Army Corps of Engineers (Corps). You should notify the Corps1 about this project and ask their assistance in determining what types of permits will be needed for the entire project. Stream Channel and Bank Modifications Your letter states that the proposed project includes the construction of boulder toes and in- stream rock vanes as well as a concrete beveled inlet on Pineola Street. If properly constructed, we have no objection to these activities. However, if improperly installed, these actions could severely alter the rivers hydrology - project design should focus on maintaining as natural of a stream channel as possible. A natural, stable stream system is one that is able to transport a wide range of flows and associated bed load (sediment) while maintaining channel features and U.S. Army Corps of Engineers, 151 Patton Avenue, Room 208, Asheville, NC 28801-5006; Telephone: (828) 271- 7980; Fax: (828) 281-8120 2 neither degrading (accelerating the erosion of banks and scour of the channel bed) nor aggrading (accelerating the deposition of sediment within the channel). Alterations to the dimension (cross-sectional view of the channel), pattern (the sinuosity of the channel), or profile (longitudinal slope) of the stream channel as well as changes to stream-bank vegetation, floodplains, hydrology, or sediment input can significantly alter this equilibrium. As we previously stated, the vast majority of property damage associated with recent flood events in areas that contain, or are adjacent to, streams can be largely tied to human-caused alterations within the stream corridor (e.g., channelization and dredging, placement of fill within floodplains, removal of stream bank vegetation, etc.). Consequently, in order to avoid future damage and associated costs, it is critical that this project emphasize the restoration of natural, stable stream conditions. Accordingly, we recommend the following: Only the absolute minimum amount of work should be done within stream channels to accomplish necessary channel/stream-bank restoration. All channel work should emphasize natural channel design methodologies. Here restoration design is based on the bank-full, or channel-forming, stage of the stream, which maintains the natural channel dimensions and transports the bulk of sediment over time (see attached reference list). Natural channel conditions can be identified using a reference reach (perhaps in areas upstream or downstream, where stream stability was maintained and adjacent properties were undamaged during floods). Restoration design should match the pattern, dimension, and profile of the reference reach. Without consideration of restoring the natural channel dimensions in restoration design, the likelihood of future erosion problems (on the site, upstream, and downstream) and ecological impacts, will increase. The U.S. Fish and Wildlife Service is willing to assist with the identification of reference reaches and to review stream restoration plans. Equipment should not be operated in the stream unless absolutely necessary. It should be operated from the banks in a fashion that minimizes disturbance to woody vegetation. Equipment should be (a) washed to remove any contaminant residue prior to project construction, (b) in good working order, and (c) checked to ensure there are no leaks of potential contaminants (such as oil or other lubricants) prior to and during construction. Stream banks with deep-rooted woody vegetation are the most stable, and stream restoration efforts should incorporate the use of native vegetation adapted to the site conditions. Biodegradable erosion-control materials may be incorporated into bank restoration design in order to stabilize soils as vegetation becomes established. Live, dormant stakes (such as black willow) may be used to reestablish root structure in riparian areas. In areas where banks are severely undercut, high, and steep, whole-tree revetment or rock may be used as a stabilization treatment (small rock, gravel, sand, and dirt are not recommended due to their erosive nature), and it should not extend above the bank-full elevation (the elevation of the channel where the natural floodplain begins). Deep-rooting woody vegetation should be established along banks where any channel work is accomplished. Tree and shrub plantings should be spaced at intervals no greater than 10 feet along banks. Vegetated riparian zone widths should be as wide as practical but should extend at least 20 feet from the stream channel. Suggested species include black locust (on dry rocky banks), silky willow and/or black willow (Salix spp.), alder (Alnus spp.), dog hobble (Leucothoe spp.), cane (Arundinaria gigantea), and/or rhododendron (Rhododendron catawbiense) (note reference below for additional species). 4. Adequate measures to control sediment and erosion must be implemented prior to any ground-disturbing activities to minimize effects on downstream aquatic resources. Temporary (e.g., rye grain, wheat, millet) or permanent herbaceous vegetation should be planted on all bare soil within 5 days of ground-disturbing activities to provide long-term erosion control. Biodegradable erosion-control matting should be used in conjunction with appropriate seeding on disturbed soils in steep slope and riparian areas. Matting should be secured in place with staples; stakes; or, wherever possible, live stakes of native trees 5. At each restoration site, cross-sections (at intervals based on restoration reach size), longitudinal profiles, and stream pattern plans should be measured and mapped prior to and immediately following any channel work. In addition, photographs should be taken to document the condition of the project site(s) prior to initiating the work and upon completion of the work. Diversion Channel We also have some concerns with the proposed flood bypass channel (diversion channel). Though diversion channels are preferred to modifying the main channel to convey flood flows (The original stream substrate and meanders are maintained, as well as in-stream cover and riparian vegetation), there are many design considerations that must be taken into account to prevent serious stream impacts and insure proper functioning flood control. To be effective in reducing the flood stage, the distance between the point of diversion and point of return to the main channel must be of sufficient length to prevent backwater effects and it is essential to consider potential morphologic effects on both the main channel and receiving channel. According to Nunnally and Shields (1985)2, diversion channels generally have steeper slopes than the main channel. This can lead to stability problems such as erosion of the channel bed and banks. The bed of tributary channels may be higher than that of the floodway channel, and bed degradation may migrate upstream of the tributary, resulting in excessive sediment transport and deposition in the floodway. Methods to mitigate channel instability such as grade control, channel lining, and bank stabilization may be required on diversion projects. 2 Nunnally, N. R., and Shields, F. D. 1985. "Incorporation of environmental features in flood control channel projects," Technical Report E-85-3, U.S. Army Engineer Waterways Experiment Station, Vicksburg, MS. 4 Additionally, diversion flows can have an adverse impact on the main channel - reducing the river flow in the main channel due to a diversion, with the slope and particle size remaining constant, will result in a decrease in sediment transport capability, thus aggradation could occur in the channel between the point of the diversion and the point of re-entry. If too much bed material is diverted, the sediment transport capability of the stream may increase, thus accelerating channel instability. Flow returning to the main channel from a diversion can also result in accelerated erosion of the channel and banks. It is essential that a detailed geomorphic and sediment transport analysis be conducted at the design stage of a diversion project to plan for potential problems. The hydraulic design of diversion channels can be accomplished with standard hydrology and hydraulics analysis techniques, while determinations of sediment transport through the diversion are much more difficult. Because the floodway invert is higher than that of the main channel, there is a tendency for the channel to become unstable and degrade. Grade control structures may be necessary on the downstream end of the floodway to prevent upstream migration of bed degradation, and on any perched tributaries that are hydraulically connected to the diversion channel. Culverts Your letter states the project will include "culvert upgrades." We recommend using bridges for all permanent roadway crossings of streams and associated wetlands. All stream crossings should be made perpendicular to the stream. We recommend bridges that span the entire floodplain because it is important for streams to have access/connectivity to the floodplain. Bridges that span the stream and floodplain are the best option because they minimize impacts to aquatic resources, allow for the movement of aquatic organisms, and eliminate the need to place fill in streams and floodplains. Bridges should be designed and constructed so that no piers or bents are placed in the stream, and approaches and abutments should not constrict the stream channel. Bridges should also be designed to allow for safe terrestrial wildlife passage. To provide for terrestrial wildlife passage, the new bridge design should span beyond the waterway so that unsubmerged land is also bridged. If bank stabilization is necessary, we recommend that the use of riprap be minimized and that a riprap-free buffer zone be maintained under the bridge to allow for wildlife movement. Longer bridge spans also cost far less than a separate wildlife crossing under an existing roadway. Also, floodplain culverts must be installed if fill is placed in the floodplain for bridge construction. If bridges are not possible and culverts are the only option, we suggest using bottomless culverts. Bottomless culverts do not need to be buried, thereby preserving the natural creek substrate and not disturbing the streambed. Culverts should be sufficiently sized to mimic natural stream functions and habitats located at the crossing site; allow for water depth, volume (flow), and velocity levels that will permit aquatic organism passage; and accommodate the movement of debris and bed material during bank-full events. Widening the stream channel must be avoided. Consideration should be given to minimum water depth during low-flow/dry periods when designing culvert placement. Sufficient water depth should be maintained during low flows to accommodate both the upstream and downstream movement of aquatic species. Water depth inside the culvert must be adequate for fish to be completely immersed and not scraping the bottom of the stream. The culvert should be designed and installed at the same slope as the stream grade to maintain an acceptable water velocity for fish passage, and the stream substrate characteristics should be retained within the culvert. Where feasible, we recommend the use of multiple barrels (other than the base-flow barrel), placed on or near stream bank-full or floodplain bench elevation, in order to accommodate floodwaters within the stream corridor. These should be reconnected to floodplain benches as appropriate. This may be accomplished by using sills on the upstream end to restrict or divert flow to the base-flow barrel(s). If the culvert is longer than 40 linear feet, alternating or notched baffles should be installed in a manner that mimics the existing stream pattern. This should enhance the passage of aquatic life by: (1) depositing sediment in the barrel, (2) maintaining channel depth and flow regimes, and (3) providing resting places for fish and other aquatic organisms. Recommendations to Prevent/Reduce Future Flooding To help prevent and reduce future flooding in the Town of Newland, we offer the following additional recommendations. In addition to the increased storm-water flows caused by the lack of or loss of riparian buffers and any floodplain development, increased development outside the floodplain will also contribute to the quantity and quality of storm water entering project area waterways. Recent studies' have shown that areas of 10- to 20-percent impervious surface (such as roofs, roads, and parking lots) double the amount of storm-water runoff compared to natural cover and decrease deep infiltration (groundwater recharge) by 16 percent. At 35- to 50-percent impervious surface, runoff triples, and deep infiltration is decreased by 40 percent. Above 75-percent impervious surface, runoff is 5.5 times higher than natural cover, and deep infiltration is decreased by 80 percent. Additionally, the adequate treatment of storm water in development areas is essential for the protection of water quality and aquatic habitat in developing landscapes. Additionally, these impervious surfaces collect pathogens, metals, sediment, and chemical pollutants and quickly transmit them (via storm-water runoff) to receiving waters. According to the Environmental Protection Agency, this nonpoint-source pollution is one of the major threats to water quality in the United States, posing one of the greatest threats to aquatic life, and is linked to chronic and acute illnesses in human populations from exposure through drinking water and contact recreation. Increased storm-water runoff also directly damages aquatic and riparian habitat, causing stream-bank and stream-channel scouring. In addition, impervious surfaces reduce groundwater recharge, resulting in even lower than expected stream flows during drought periods, which can induce potentially catastrophic effects for fish, mussels, and other aquatic life. Accordingly, we recommend that all new developments, regardless of the percentage of impervious surface area they will create, implement storm-water-retention and -treatment measures designed to replicate and maintain the hydrograph at the preconstruction condition in order to avoid any additional impacts to habitat quality within the watershed. 'Federal Interagency Stream Restoration Working Group (15 federal agencies of the United States Government). October 1998. Stream Corridor Restoration: Principles, Processes, and Practices. GPO Item No. 0120-A; SuDocs No. A 57.6/2:EN 3/PT.653. ISBN-0-934213-59-3. 6 We recommend the use of low-impact-development techniques,' such as reduced road widths, grassed swales in place of curb and gutter, rain gardens, and wetland retention areas, for retaining and treating storm-water runoff rather than the more traditional measures, such as large retention ponds, etc. These designs often cost less to install and significantly reduce environmental impacts from residential development. Where detention ponds are used, storm-water outlets should drain through a vegetated area prior to reaching any natural stream or wetland area. Detention structures should be designed to allow for the slow discharge of storm water, attenuating the potential adverse effects of storm-water surges; thermal spikes; and sediment, nutrient, and chemical discharges. Also, because the purpose of storm-water-control measures is to protect streams and wetlands, no storm-water-control measures or best management practices should be installed within any stream (perennial or intermittent) or wetland. We also recommend that consideration be given to the use of pervious materials (i.e., pervious concrete, interlocking/open paving blocks, etc.) for the construction of roads, driveways, sidewalks, etc. Pervious surfaces minimize changes to the hydrology of the watershed and can be used to facilitate groundwater recharge. Pervious materials are also less likely to absorb and store heat and allow the cooler soil below to cool the pavement. Additionally, pervious concrete requires less maintenance and is less susceptible to freeze/thaw cracking due to large voids within the concrete. One of the most important and effective measures that can be taken to protect stream health is the preservation of riparian buffers. Wide, contiguous riparian buffers have greater and more flexible potential than other options to maintain biological integritys and can ameliorate many ecological issues related to land use and environmental quality.6 Importantly for this project, riparian areas act as "sponges" by absorbing runoff (which reduces the severity of floods) and, by allowing runoff to infiltrate and recharge groundwater levels, maintain stream flows during dry periods. Additionally, riparian buffers accomplish the following: 1. catch and filter runoff, thereby preventing nonpoint-source pollutants from reaching streams; 2. enhance the in-stream processing of both point- and nonpoint-source pollutants; 3. catch and help prevent excess woody debris from entering the stream and creating logjams; 4. stabilize stream banks and maintain natural channel morphology; 'We recommend visiting the Environmental Protection Agency's Web site (http://www.epa.govlowowlnpsllidl)for additional information and fact sheets regarding the implementation of low-impact-development techniques. 5R. Horner, C. May, E. Livingston, and J. Maxted. 1999. Impervious Cover, Aquatic Community Health, and Storm Water BMPs: Is There a Relationship? In: Proceedings of the Sixth Biennial Storm Water Research and Watershed Management Conference. Southwest Florida Water Management District, Tampa, FL. 6R. J. Naiman, H. DeCamps, and M. Pollock. 1993. The role of riparian corridors in maintaining regional biodiversity. Ecol. Appl. 3:209-212. 7 5. provide coarse woody debris for habitat structure and most of the dissolved organic carbon and other nutrients necessary for the aquatic food web; and 6. maintain air and water temperatures around the stream. For most projects, we recommend the maintenance or establishment of minimum 100-foot native forested buffers along each side of perennial streams and 50-foot native forested buffers along each side of intermittent streams and wetlands throughout the present and future service areas of the entire municipal jurisdiction.7 We additionally encourage the implementation of buffers on ephemeral streams due to the important functions they provide as headwater streams.', 9 Buffers should be measured horizontally from the edge of the stream bank,10 which may result in wider buffers at higher gradients, and must be provided over the entire length of the stream, including headwater streams, springs, and seeps. Further, we recommend leaving 30 percent of the development area as green space, which would include buffers and wetlands and ensure that the green space is connected to aquatic resources. The North Carolina Wildlife Resources Commission has developed a "Guidance Memorandum to Address and Mitigate Secondary and Cumulative Impacts to Aquatic and Terrestrial Wildlife Resources and Water Quality" that we support and encourage you to use. It can be accessed via the Internet as follows: http: //www. ncwildlife. org/pg07_wildlifespeciescon/pg7c3_impacts.pdf. We are also concerned with the introduction and spread of invasive exotic species in association with the proposed project. Without active management, including the revegetation of disturbed areas with native species, the project area will likely be a source of invasive exotic plant species. Exotic species are a major contributor to species depletion and extinction, second only to habitat loss. Exotics are a factor contributing to the endangered or threatened status of more than 40 percent of the animals and plants on the Federal List of Endangered and Threatened Wildlife and Plants.11 It is estimated that at least 4,000 exotic plant species and 2,300 exotic animal species are now established in the United States, costing more than $130 billion a year to 7J. S. Stewart, D. M. Downes, L. Wang, J. A. Wierl, and R. Bannerman. 2000. Influences of riparian corridors on aquatic biota in agricultural watersheds. Pages 209-214 in P. J. Wigington, Jr., and R. L. Beschta, eds. Proceedings of the American Water Resources Association International Conference on riparian ecology and management in multi-land use watersheds, Portland, OR. sR. B. Alexander, R. A. Smith, and G. E. Schwarz. 2000. Effect of Stream Channel Size on the Delivery of Nitrogen to the Gulf of Mexico. Nature 403:758-761. 9B. J. Peterson, W. M. Wolheim, P. J. Mulholland, J. R. Webster, J. L. Meyer, J. L. Tank, E. Marti, W. B. Bowden, H. M. Valett, A. E. Hershey, W. H. McDowell, W. K. Dodds, S. K. Hamilton, S. Gregory, and D. D. Morrall. 2001. Control of Nitrogen Export from Watersheds by Headwater Streams. Science 292:86-90. 10K. L. Knutson and V. L. Nae£ 1997. Management recommendations for Washington's priority habitats: riparian Washington Department of Fish and Wildlife, Olympia, WA. 181 pp. "D. S. Wilcove, D. Rothstein, J. Dubow, A. Phillips, and E. Losos. 1998. Quantifying threats to imperiled species in the United States. BioScience 48:607-615. control. 12 Additionally, the U.S. Government has many programs and laws in place to combat invasive species (see www. invasivespecies.gov) and thus cannot spend money to counter these efforts. Specifically, Section 2(a)(3) of Executive Order 13112 - Invasive Species (February 3, 1999) directs federal agencies to "not authorize, fund, or carry out actions that it believes are likely to cause or promote the introduction or spread of invasive species in the United States or elsewhere." Despite their short-term erosion-control benefits, many exotic species used in soil stabilization seed mixes are persistent once they are established, thereby preventing the reestablishment of native vegetation. Many of these exotic plants 13 are also aggressive invaders of nearby natural areas, where they are capable of displacing already-established native species. Therefore, we strongly recommend that only native plant species be used in association with all aspects of this project. We do not believe this project will have any effect on federally listed species. Therefore, the requirements under section 7(c) of the Act are fulfilled. However, obligations under section 7 of the Act must be reconsidered if. (1) new information reveals impacts of this identified action that may affect listed species or critical habitat in a manner not previously considered, (2) this action is subsequently modified in a manner that was not considered in this review, or (3) a new species is listed or critical habitat is determined that may be affected by the identified action. We appreciate the opportunity to provide these comments. If we can be of assistance or if you have any questions, please do not hesitate to contact Mr. Allen Ratzlaff of our staff at 828/258-3939, Ext. 229. In any future correspondence concerning this project, please reference our Log Number 4-2-10-046. cc: Mr. David McHenry, Mountain Region Reviewer, North Carolina Wildlife Resources Commission, 20830 Great Smoky Mtn. Expressway, Waynesville, NC 28786 Ms. Tasha McCormick, U.S. Army Corps of Engineers, 151 Patton Avenue, Room 208, Asheville, NC 28801-5006 Ms. Susan B. Fuhr, Tennessee Valley Authority, 3726 E. Morris Boulevard, MOC IA-MOT Morristown, TN 37813-1270 12D. L. Pimentel, L. Lach, R. Zuniga, and D. Morrison. 2000. Environmental and economic costs of nonindigenous species in the United States. BioScience 50:53-65. 13Lists of invasive exotic plants can be found at http://Www.tneppe.orgl and http://www.invasive.org/eastern/srs/on the Internet. 9 References: B.A. Doll, G.L. Grabow, K.R. Hall, James Halley, W.A. Harman, G.D. Jennings, and D.E. Wise. 2003. Stream Restoration, A Natural Channel Design Handbook. North Carolina Stream Restoration Institute and North Carolina Sea Grant (Web link: http://www.bae.ncsu.edu/programs/extension/wgglsri/stream_rest_ guidebook/sr_guidebook.pdj); available online at North Carolina State University, Raleigh, NC. Karen Hall. 2001. Recommended native plant species for stream restoration in North Carolina. Mountain Physiographic Region. North Carolina Stream Restoration Institute. (Web link: http://Www5.bae.ncsu.edu/bae/programs/ extensionlwgg/srilRecommended%20Native%20PIant%20Species.htm#Mountain %20Region). W.H. Harman, et al. 1999. Bankfull Hydraulic Geometry Relationships for North Carolina Streams. AWRA Wildland Hydrology Symposium Proceedings. Edited by: D.S. Olsen and J.P. Potyondy. AWRA Summer Symposium. Bozeman, MT. (Web link: http://www.saw.usace.army.mil/wetlands/Mitigation/ Documents/Stream/Appendices/AppendixVI.pdf. Cheryl C. Harrelson, C.L. Rawlins, and John P. Potyondy. 1994. Stream channel reference sites: an illustrated guide to field technique. General Technical Report. RM-245. U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. Fort Collins, CO. 61 pp. (Web link: http://www.stream fs fed.us/publicationslPDFsIRM245E.PDF. 10 Page 1 of 1 George Lankford From: George Lankford Sent: Monday, November 23, 2009 4:17 PM Subject: Town of Newland Flood Bypass Channel Mr. Linville, On behalf of the Town of Newland (Owner), WK Dickson is requesting a review comments the proposed project. The project is located in the Town of Newland on Pineola Street (State Highway 194) and the confluence with Kentucky Creek (Figure 1) River Basin (HUC 06010108). of the above referenced project for the North Toe River starting above .. The project is in the French Broad Project Information The purpose of this project is a reduction in large scale flooding along the North Toe River downstream of the Town of Newland (Figure 2). Subsequent to the flooding in September 2004 from Tropical Storm Frances and Hurricane Ivan, approximately six homes were bought out as part of FEMA's Hazard Mitigation Grant Program (HMGP). This project focuses on reducing upstream flooding in the downtown business district. The proposed project is located in the Town of Newland and much of the surrounding area is developed land (Figure 3). The channel in the project area has been altered through filling of the floodplain and constriction of the banks. The project consists of creating a flood bypass channel above the ordinary high water mark downstream of the town and stabilizing approximately 600 linear feet of stream bank through construction of boulder toes and in-stream rock vanes (Figure 3). Along the floodplain, a paved walking trail and a raised footbridge will be constructed to connect a town park and an existing greenway trail. Wing walls will be constructed upstream of the reinforced concrete box culverts under Pineola Street to improve hydraulic efficiency. Additional drainage modifications outside of the stream channel are also proposed, including culvert upgrades and stormwater collection and diversion into a stormwater detention basin. When completed, the project will improve stream flows and significantly reduce flooding in the Newland business district. The design for the project is being developed concurrently with environmental documentation and in compliance with applicable environmental laws and regulations. This process offers you the opportunity to identify site-specific conditions to be addressed prior to completion of the design. Attached are the figures and select plan sheets. Please contact me with any questions and your comments. Thank you, George Lankford Technical Project Manager WK Dickson 720 Corporate Center Drive Raleigh, NC 27607 Voice: (919) 782-0495 Mb: (919) 610-0168 Fax: (919) 782-9672 glankford@wkdickson.com 12/2/2009 Attachment 5 Photo Log Photo Log Town of Newland Bypass Channel Project ?xi?un? ?.ununiuns Facing upstream from Pineola Street. Kentucky Creek enters from south (r 1 ght). Photo Log Town of Newland Bypass Channel Project Wsting Conditions r. &.. #? L A a . a r 61, . 4 , .? ` f t A p Y4 a6 `i 4 3 Facing downstream from Pi neola Street 2 3 Photo Log Town of Newland Bypass Channel Project Photo Log Town of Newland Bypass Channel Project Existing Conditions e 3 s S 731 t F x S }t f w ,r 3 w ?j''j' q A "bt 4 i racing Jett bank. Photo Log Town of Newland Bypass Channel Project Photo Log Town of Newland Bypass Channel Project Existing Conditions - r ?., ?.. ''? 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OF TRANSPORTATION ENGLISH STANDARD DRAWING FOR BRICK ENDWALL FOR SINGLE - ap DIVISION OF HIGHWAYS RALEIGH, N.C. AND DOUBLE PIPE CULVERTS 15" THRU 48" PIPE - 90° SKEW . i a 8 a w z > 0 0 e r ` N wig LLJ U b ■NO Y U W 0 Ld w b3 o V< ~ ct f' -- pSpS55 Rip L) 061 N N N 4 ,A dri d d lil Lo Q op$ Asa oj. 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