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HomeMy WebLinkAbout20051632 Ver 1_Complete File_20050929W A T ?9QG o c September 29, 2005 Buncombe County V., DWQ Project No. 051632 NCSR 1122 (Old Pisgah Highway) APPROVAL of 401 Water Quality Certification with Additional Conditions Mr. J. J. Swain, Jr., P.E. Division Engineer N C Department of Transportation Post Office Box 3279 Asheville, North Carolina 28802 Dear Mr. Swain: You have our approval, in accordance with the attached conditions and those listed below, to impact 30 linear feet of two (2) unnamed tributaries to South Hominy Creek (30 linear feet of new pipe and temporary dewatering), in order to make improvements to NCSR 1122 (Old Pisgah Highway) in Buncombe County. The project should be constructed in accordance with your application dated August 23, 2005 (received August 26, 2005) and revised application dated September 12, 2005 (received September 15, 2005), including the environmental comments made in the application letter. After reviewing your application, we have decided that this fill is covered by General Water Quality Certification Nos. 3404 and 3366, corresponding to the U.S. Army Corps of Engineers Nationwide Permit Numberi 14 and 33. In addition, you must acquire any other federal, state or local permits before you proceed with your project including (but not limited to) Sediment and Erosion Control, Non-Discharge and Water Supply Watershed regulations. This approval will expire with the accompanying 404 Permit unless otherwise specified in the Water Quality Certification. This approval is valid solely for the purpose and design described in your application (unless modified below). Should your project change, you must notify the DWQ in writing and submit a new application. If the property is sold, the new owner must be given a copy of this Certification and approval letter, and is thereby responsible for complying with all the conditions. If total wetland fills for this project (now or in the future) exceed one acre, or if total impacts to streams (now or in the future) exceed 150 linear feet, compensatory mitigation may be required as described in 15A NCAC 2H .0506 (h) (6) and (7). For this approval to he valid, you must follow the conditions listed in the attached certification and any additional conditions listed below. Erosion and sediment control practices must be in full compliance with all specifications governing the proper design, installation and operation and maintenance of such Best Management Practices in order to protect surface waters standards: a. The erosion and sediment control measures for the project must be designed, installed, operated, and maintained in accordance with the most recent version of the North Carolina Sediment and Erosion Control Planning and Design Manual. b. The design, installation, operation, and maintenance of the sediment and erosion control measures must be such that they equal, or exceed, the requirements specified in the most recent version of the North Carolina Sediment and Erosion Control Manual. The devices shall be maintained on all construction sites, borrow sites, and waste pile (spoil) projects, including contractor-owned or leased borrow pits associated with the project. c. For borrow pit sites, the erosion and sediment control measures must be designed, installed, operated, and maintained in accordance with the most recent version of the North Carolina Surface Mining Manual. N we Carolina Naturally North Carolina Division of Water Quality 2090 U.S. Highway 70 Swannanoa, NC 28778 Phone (828) 2964500 Customer Service Internet: h2o.enrstate.nc.us FAX (828) 299-7043 1-877-623-6748 Michael F. Easley, Governor William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources Alan W. Klimek, P.E. Director Division of Water Quality An Equal Opportunity/Affirmative Action Employer Mr. J. J. Swain, Jr., P.E. September 29, 2005 Page Two d. Any reclamation measures and implementation must comply with the reclamation in accordance with the requirements of the Sedimentation Pollution Control Act. 2. No waste, spoil, solids, or fill of any kind shall occur in wetlands, waters, or riparian areas beyond the footprint of the impacts depicted in the Preconstruction Notice Application. All construction activities, including the design, installation, operation, and maintenance of sediment and erosion control Best Management Practices, shall be performed so that no violations of state water quality standards, statutes, or rules occur. 3. Sediment and erosion control measures shall not be placed in wetlands or waters to the maximum extent practicable. If placement of sediment and erosion control devices in wetlands and waters is unavoidable, they shall be removed and the natural grade restored within six months of the date that the Division of Land Quality has released the project. 4. Sediment and erosion control measures for sensitive watersheds [ 15A NCAC 04B .0124 (a)-(e)] must be used prior to construction and maintained until any disturbed soils are permanently stabilized. Temporary or permanent herbaceous vegetation should be planted on all bare soil within fifteen (15) days of ground disturbing activities to provide long-term erosion control. Erosion control mating 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. Tall fescue should not be used in riparian areas. Riparian vegetation must be reestablished within the construction limits of the project by the end of the growing season following completion of construction. 5. Culverts that are less than 48-inch in diameter should be buried to a depth equal to or greater than 20% of their size to allow for aquatic life passage. Culverts that are 48-inch diameter or larger should be buried at least 12 inches below the stream bottom to allow natural stream bottom material to become established in the culvert following installation and to provide aquatic life passage during periods of low flow. This may require increasing the size of the culvert to meet flow conveyance requirements. If any of the existing pipes are perched, they shall be removed and replaced, and re-installed correctly, unless demonstrated that this is topographically unfeasible. 6. Rock check dams at culvert outlets should be removed at the project completion to avoid impeding the movement of aquatic life. 7. The dimension, pattern and profile of the stream, above and below the culverts, should not be modified by widening the stream channel or reducing the stream depth. Disturbed floodplains and streams should be restored to natural geomorphic conditions. 8. Stormwater shall be directed to vegetated buffer areas, grass lined ditches or other means appropriate to the site for the purpose of pre-treating stormwater runoff, and must not be routed directly into streams. Mowing of existing vegetated buffers is strongly discouraged, so that they may be utilized for stormwater diffuse flow. 9. Removal of vegetation at the stream crossings and adjacent to streams should be minimized. Native trees and shrubs (e.g. Rhododendron, dog hobble, willows, alders, sycamores, dogwoods, black walnut and red maple) should be planted along the streambank to reestablish the riparian zone and to provide long-term erosion control in the vicinity of the road crossing and along the streams within dedicated rights of way. 10. Any riprap placed for bank stabilization should be limited to the streambank below the high water mark, and vegetation should be used for stabilization above the high water elevation. Riprap should not be place in stream channels in such a manner that it impedes aquatic life passage. 11. Heavy equipment must be operated from the banks rather than in the stream channel in order to minimize sedimentation and to reduce the likelihood of introducing other pollutants into the stream. 12. All mechanized equipment operated near surface waters must be regularly inspected and maintained to prevent contamination of stream waters from fuels, lubricants, hydraulic fluids, or other toxic materials. 13. Excavation of the stream crossings and relocations should be conducted in the dry, if possible. Sandbags, cofferdams, flexible pipe or other diversion structures should be used to minimize excavation in flowing water. 14. If concrete is used during culvert construction (e.g., headwalls), a dry work area should be maintained to prevent direct contact between curing concrete and stream water. Water that inadvertently contacts uncured concrete should not be discharged to surface waters due to the potential for elevated pH and possible aquatic life and fish kills. 15. Discharging hydroseed mixtures and washing out hydroseeders and other equipment in or adjacent to surface waters is strictly prohibited. 16. The presence of equipment in the channels must be minimized. Under no circumstances must rock, sand or other materials be dredged from the wetted stream channel under authorization of this permit, except in the immediate vicinity of the culverts. In-stream dredging has catastrophic effects on aquatic life, and disturbance of the natural form of the stream channel will likely cause downstream erosion problems, possibly affecting other landowners. Mr. J. J. Swain, Jr., P.E. September 29, 2005 Page Three 17. This certification does not authorize the discharge of waste rock and dirt into the stream or riparian zone except for permitted areas associated with the culvert extensions. 18. All work shall be performed during low flow conditions (below bankfull). 19. Upon completion of the project, the NCDOT shall complete and return the enclosed "Certificate of Completion " form to notify NCDWQ when all work included in the §401 Certification has been completed. The responsible party shall complete the attached form and return it to the Transportation Permitting Unit of the NC Division of Water Quality upon completion of the project. The NCDOT is strongly advised to send in photographs upstream and downstream of each structure to document correct installation. If you do not accept any of the conditions of this certification, you may ask for an adjudicatory hearing. You must act within 60 days of the date that you receive this letter. To ask for a hearing, send a written petition, which conforms to Chapter 150B of the North Carolina General Statutes to the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, N.C. 27699-6714. This certification and its conditions are final and binding unless you ask for a hearing. This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water Act. If you have any questions, please telephone Mr. Mike Parker of the Asheville Regional Office at 828.296.4500. Sincerely, Alan W. Klimek, P.E., Director Division of Water Quality Attachment cc: Roger Bryan, Division 13, DEO Ed Ingle, Roadside Environmental Angie Pennock, USACE Asheville Field Office Transportation Permitting Unit Mike Parker, Asheville Regional Office 004 V ? ? : .? ?T?'?o FNS. j ? v sr FR ?S STATE OF NORTH CAROLINA Re'?aoy DEPARTMENT OF TRANSPORTATION MICHAEL F. EASLEY LYNDO TIPPETT GOVERNOR SECRETARY PO BOX 3279, ASHEVILLE, NC 28802 September 12, 2005 Mrs. Angie Pennock US Army Corps of Engineers 151 Patton Avenue, Room 208 Asheville, NC 28801-5006 Subject: Nationwide Permits #14 & # 33 - Application Revision SR 1122, Old Pisgah Hwy (a.k.a. Brendell) State Project No. 13C.011086 (DWQ Minor Permit Fee $200) Buncombe County, NC Dear Mrs. Pennock: I have enclosed a revised straight-line diagram with erosion control plan and revised stream impact chart for the requested NWP #14 & #33 relative to the proposed project on SR 1122, Old Pisgah Hwy (a.k.a. Brendell), Buncombe County, N.C. Division of Highways plans to impact an additional 10 linear feet of stream at Site 1 (13+86) for a total of 20 linear feet. The impact for the entire project will be 30 linear feet of stream impact. It should also be noted that the concrete box culvert at Site 1 (13+86) will be removed and replaced with a 51" metal pipe. Existing channel morphology will be maintained upstream and downstream of the culverts. The culverts will be placed below existing streambed elevation. Riparian vegetation will be reestablished along disturbed areas associated with the culvert extensions. Stormwater will be diverted through grass-lined ditches or vegetated buffers prior to entering streams. By copy of this letter, we request David McHenry, North Carolina Wildlife Resources Commission Coordinator, to comment directly to the Corps concerning the permit revision request. Mrs. Angie Pennock Page -2 SR 1122, Buncombe County September 12, 2005 By copy of this letter, I am forwarding seven (7) copies of the application revision to Brian Wrenn, NC Division of Water Quality, 401/Wetland Unit and an additional copy to Mike Parker, NC DWQ Asheville Regional Office for review and comment. Please forward comments directly to the Corps with copy to Division 13 Environmental Officer. Your earliest consideration for this request would be greatly appreciated. If you have any questions or information needs, please contact me at (828) 251-6171. Sincerely, Paul G. Wiesner Division 13 Environmental Specialist Enclosures cc: J.J. Swain, Jr., P.E. H. M. Coates, P.E. Ed Ingle David McHenry Brian Wrenn Mike Parker wetland or stream mitigation, list and describe the impact in Section VIII below. If additional space is needed for listing or description, please attach a separate sheet. 1. Provide a written description of the proposed impacts: We propose to remove one existing concrete box culvert on an UT to South Hominy Creek and replace it with a 51" metal pipe. We additionally plan to extend an existing culvert on an UT of South Hominy Creek. Total culvert extensions will be 30 linear feet. 2. Individually list wetland impacts. Types of impacts include, but are not limited to mechanized clearing, grading, fill, excavation, flooding, ditching/drainage, etc. For dams, __?..1.. 1:- A- 4n hnO, efrilmime and flnnding_ Wetland Impact Site Number (indicate on map) Type of Impact Type of Wetland (e.g., forested, marsh, herbaceous, bog, etc.) Located within 100-year Floodplain es/no Distance to Nearest Stream linear feet Area of Impact (acres) N/A - 7 Total Wetland Impact (acres) N/A 3. List the total acreage (estimated) of all existing wetlands on the property: 0.0 4. Individually list all intermittent and perennial stream impacts. Be sure to identify temporary impacts. Stream impacts include, but are not limited to placement of fill or culverts, dam construction, flooding, relocation, stabilization activities (e.g., cement walls, rip-rap, crib walls, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed, plans and profiles showing the linear footprint for both the original and relocated streams t b included To calculate acreage multi 1 len h X width, then divide b 43,560. mus Stream Impact Number indicate on ma e Stream Name Type of Impact Perennial or Intermittent? Average Stream Width Before Impact Impact Length linear feet Area of Impact acres Site 1 (13+86) UT of South Hominy Creek Box Culvert Extension Perennial 4 20' 0.00184 Site 2 (24+75) UT of South Homin Creek -_ Culvert Extension Intermittent 1 10' 0.00023 Total Stream Impact (by length and acreage) 30' 0.0021 Page 4 of 9 5. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic Ocean and any other water of the U.S.). Open water impacts include, but are not limited to fill, excavation, dredging, flooding, drainage, bulkheads, etc. Open Water Impact Site Number indicate on ma Name of Waterbody (if applicable) Type of Impact Type of Waterbody (lake, pond, estuary, sound, bay, ocean, etc. Area of Impact acres N/A Total Open Water Impact (acres) N/A 6. List the cumulative impact to all Waters of the U.S. resulting from the project Stream Impact (acres : 0.0021 Wetland Impact (acres): 0.0 Open Water Impact acres : 0.0 Total Impact to Waters of the U.S. acres 0.0021 Total Stream Impact linear feet): 30' 7. Isolated Waters Do any isolated waters exist on the property? ? Yes ® No Describe all impacts to isolated waters, and include the type of water (wetland or stream) and the size of the proposed impact (acres or linear feet). Please note that this section only applies to waters that have specifically been determined to be isolated by the USAGE. 8. Pond Creation If construction of a pond is proposed, associated wetland and stream impacts should be included above in the wetland and stream impact sections. Also, the proposed pond should be described here and illustrated on any maps included with this application. Pond to be created in (check all that apply): ? uplands ? stream ? wetlands Describe the method of construction (e.g., dam/embankment, excavation, installation of draw-down valve or spillway, etc.): Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond, local stormwater requirement, etc.): Current land use in the vicinity of the pond: Size of watershed draining to pond: VII. Impact Justification (Avoidance and Minimization) Expected pond surface area: Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide information related to site constraints such as topography, building ordinances, accessibility, and financial viability of the project. The applicant may attach drawings of alternative, lower-impact site layouts, and explain why these design options were not feasible. Also discuss how impacts were minimized once the desired site plan was developed. If applicable, discuss construction Page 5 of 9 NC t)oT R/vw \p- 31 SR I ? 2 2 PG. Sf HENRY M, PIOT'O I I 3ro4Sd/ Sod / 30-?" CAP NEB P",)70 9r5j('6 T P. 3b? g 1540 W 00 D5 3y 3 Y. 3? 3'BRANCH .13 • qq ? ?3 in I ? I I? ?- - to GR DR, ?RoP, 25" IS"CMP I I Z'x3'xG 3 CAC v • HiGHPOiNT 11+32 • I I I nq I I? • I I E. O. P IO t IO 8 MARY CLEVINGER z?65/140 A AA7[ a O v .?.,, l of 6' ?NOS?MwgFr? ,j STATE OF NORTH CAROLINA 84144 DEPARTMENT OF TRANSPORTATION MICHAEL F. EASLEY LYNDO TIPPETT GOVERNOR SECRETARY PO BOX 3279, ASHEVILLE, NC 28802 August 23, 2005 Mrs. Angie Pennock US Army Corps of Engineers 151 Patton Avenue, Room 208 Asheville, NC 28801-5006 051632 Subject: Nationwide Permits #14 & # 33 SR 1122, Old Pisgah Hwy (a.k.a. Brendell) State Project No. 13C.011086 (DWQ Minor Permit Fee $200) Buncombe County, NC Dear Mrs. Pennock: I have enclosed a straight-line diagram with erosion control plan, a PCN application for NWP #14 & #33, and a vicinity map relative to the proposed project on SR 1122, Old Pisgah Hwy (a.k.a. Brendell), Buncombe County, NC. Old Pisgah Hwy (a.k.a. Brendell) is currently a 14-16 feet wide gravel road. Division of Highways plans to pave the road 18 feet wide and increase the typical section. Grading will be light. We propose to extend one existing concrete box culvert on an UT to South Hominy Creek and we propose to extend one pipe culvert on an UT to South Hominy Creek. Total culvert extensions will be 20 linear feet. The UT of South Hominy Creek at Site 1 is an approximately 4 foot wide creek with riffle/pool habitats, sand substrate, and bed/bank features. The UT of South Hominy Creek at Site 2 is an approximately 1 foot wide heavily vegetated feature with a loamy clay substrate and appears to be a "wet ditch". No stream relocation will be performed for the project. Existing channel morphology will be maintained upstream and downstream of the culverts. The culverts will be placed below existing streambed elevation. Riparian vegetation will be reestablished along disturbed areas associated with the culvert extensions. Stormwater will be diverted through grass-lined ditches or vegetated buffers prior to entering streams. 1 ?V. P Mrs. Angie Pennock Page -2 SR 1122, Buncombe County August 23, 2005 No effect on federally listed species (threatened or endangered) or their habitats is anticipated. As a part of the 401 Certification process, a copy of the application will be forwarded to the NC State Historic Preservation Office as required by Section 106 of the National Historic Preservation Act of 1966 and GS 121-12(a). By copy of this letter, we request David McHenry, North Carolina Wildlife Resources Commission Coordinator, to comment directly to the Corps concerning the permit request. By copy of this letter, we are asking Ed Ingle, Area Roadside Environmental Engineer, to comment on the above project. Temporary encroachment into the buffer zone of the UT will be required for the entire project (1,525 feet). South Hominy Creek is classified as trout. A buffer variance will be required. By copy of this letter, I am forwarding seven (7) copies of the application package to Brian Wrenn, NC Division of Water Quality, 401 /Wetland Unit and an additional copy to Mike Parker, NC DWQ Asheville Regional Office for review and comment. Please charge the application processing fee of $200.00 to WBS element # 13C.011086. Please forward comments directly to the Corps with copy to Division 13 Environmental Officer. Your earliest consideration for this request would be greatly appreciated. If you have any questions or information needs, please contact me at (828) 251-6171. Sincerely, Pr 0.6"'r- Roger D. Bryan Division 13 Environmental Officer Enclosures cc: J.J. Swain, Jr., P.E. H. M. Coates, P.E. Ed Ingle David McHenry Brian Wrenn Mike Parker Office Use Only' Form Version March 05 20051 632 USACE Action ID No. DWQ No. (It any particular item is not appttcaoie to Tilts project, pICaSC Clllei INVl PIPP Icaulc vl IVIt% .) I. Processing Check all of the approval(s) requested for this project: ® Section 404 Permit ? Riparian or Watershed Buffer Rules ? Section 10 Permit ? Isolated Wetland Permit from DWQ ® 401 Water Quality Certification ? Express 401 Water Quality Certification 2. Nationwide, Regional or General Permit Number(s) Requested: NWP 14, NWP 33 3. If this notification is solely a courtesy copy because written approval for the 401 Certification is not required, check here: ? 4. If payment into the North Carolina Ecosystem Enhancement Program (NCEEP) is proposed for mitigation of impacts, attach the acceptance letter from NCEEP, complete section VIII, and check here: ? 5. If your project is located in any of North Carolina's twenty coastal counties (listed on page 4), and the project is within a North Carolina Division of Coastal Management Area of Environmental Concern (see the top of page 2 for further details), check here: ? II. Applicant Information 1. Owner/Applicant Information Name: J.J. Swain, Jr., P.E., Division Engineer Mailing Address: NC Department of Transportation P.O. Box 3279 Asheville, NC 28802 Telephone Number: 828-251-6171 Fax Number: 828-251-6394 E-mail Address: pwiesner0)dot.state.nc.us 2. Agent/Consultant Information (A signed and dated copy of the Agent Authorization letter must be attached if the Agent has signatory authority for the owner/applicant.) N/A Name: Company Affiliation: Mailing Address: Telephone Number: Fax Number: E-mail Address: Page I of 9 III. Project Information Attach a vicinity map clearly showing the location of the property with respect to local landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property boundaries and development plans in relation to surrounding properties. Both the vicinity map and site plan must include a scale and north arrow. The specific footprints of all buildings, impervious surfaces, or other facilities must be included. If possible, the maps and plans should include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion, so long as the property is clearly defined. For administrative and distribution purposes, the USACE requires information to be submitted on sheets no larger than 11 by 17-inch format; however, DWQ may accept paperwork of any size. DWQ prefers full-size construction drawings rather than a sequential sheet version of the full-size plans. If full-size plans are reduced to a small scale such that the final version is illegible, the applicant will be informed that the project has been placed on hold until decipherable maps are provided. 1. Name of project: SR 1122, Old Pisgah Highway (aka Brendell) 2. T.I.P. Project Number or State Project Number (NCDOT Only): 13C.011086 3. Property Identification Number (Tax PIN): N/A 4. Location County: Buncombe Nearest Town: Candler Subdivision name (include phase/lot number): N/A Directions to site (include road numbers/names, landmarks, etc.): Heading south on NC 151 take a right on SR 1123 and an immediate left onto SR 1122. 5. Site coordinates (For linear projects, such as a road or utility line, attach a sheet that separately lists the coordinates for each crossing of a distinct waterbody.) Decimal Degrees (6 digits minimum): Site 1: 35° 31' 41.60" N 82° 42' 6.32" W Site 2: 35° 31' 37.01" N 82°42'21.76" W 6. Property size (acres): 1.55-Acres 7. Name of nearest receiving body of water: Unnamed Tributary (UT) of South Hominy Creek (Class C-TR) 8. River Basin: French Broad (Note - this must be one of North Carolina's seventeen designated major river basins. The River Basin map is available at http://h2o.enr.state.nc.us/admin,,mans/.) 9. Describe the existing conditions on the site and general land use in the vicinity of the project at the time of this application: The site is an existing gravel road. _ Surrounding properties are agricultural and residential land. Page 2 of 9 10. Describe the overall project in detail, including the type of equipment to be used: We propose to grade drain base pave and install erosion control measures for SR 1122-Old Pisgah Hwy (aka Brendell). The equipment to be utilized includes Excavator, backhoe, and trucks. 11. Explain the purpose of the proposed work: We propose to grade, drain, base, pave and install erosion control measures for SR 1122-Old Pisgah Hwy (a.k.a. Brendell). We propose to extend one existing concrete box culvert on an UT to South Hominy Creek and an existing culvert on an UT of South Hominy Creek. Total culvert extensions will be 20 linear feet. The culverts will be installed to insure aquatic life passage within the streams. IV. Prior Project History if jurisdictional determinations and/or permits have been requested and/or obtained for this project (including all prior phases of the same subdivision) in the past, please explain. Include the USACE Action ID Number, DWQ Project Number, application date, and date permits and certifications were issued or withdrawn. Provide photocopies of previously issued permits, certifications or other useful information. Describe previously approved wetland, stream and buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project, list and describe permits issued for prior segments of the same T.I.P. project, along with construction schedules. N/A V. Future Project Plans Are any future permit requests anticipated for this project? If so, describe the anticipated work, and provide justification for the exclusion of this work from the current application. No no future plans VI. Proposed Impacts to Waters of the United States/Waters of the State It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to wetlands, open water, and stream channels associated with the project. Each impact must be listed separately in the tables below (e.g., culvert installation should be listed separately from riprap dissipater pads). Be sure to indicate if an impact is temporary. All proposed impacts, permanent and temporary, must be listed, and must be labeled and clearly identifiable on an accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial) should be shown on a delineation map, whether or not impacts are proposed to these systems. Wetland and stream evaluation and delineation forms should be included as appropriate. Photographs may be included at the applicant's discretion. If this proposed impact is strictly for Page 3 of 9 wetland or stream mitigation, list and describe the impact in Section VIII below. If additional space is needed for listing or description, please attach a separate sheet. 1. Provide a written description of the proposed impacts: We propose to extend one existing concrete box culvert on an UT to South Hominy Creek and an existing culvert on an UT of South Hominy Creek Total culvert extensions will be 20 linear feet. Individually list wetland impacts. Types of impacts include, but are not limited to mechanized clearing, grading, fill, excavation, flooding, ditching/drainage, etc. For dams, separately list impacts due to both structure and flooding. Wetland Impact Site Number (indicate on map) Type of Impact Type of Wetland (e.g., forested, marsh, herbaceous, bog, etc.) Located within 100-year Floodplain es/no Distance to Nearest Stream linear feet Area of Impact (acres) N/A Total Wetland Impact (acres) N/A 3. List the total acreage (estimated) of all existing wetlands on the property: 0.0 4. Individually list all intermittent and perennial stream impacts. Be sure to identify temporary impacts. Stream impacts include, but are not limited to placement of fill or culverts, dam construction, flooding, relocation, stabilization activities (e.g., cement walls, rip-rap, crib walls, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed, plans and profiles showing the linear footprint for both the original and relocated streams must be included. To calculate acreage, multiply length X width, then divide by 43,560. Stream Impact Number indicate on ma Stream Name Type of Impact Perennial or Intermittent? Average Stream Width Before Impact Impact Length linear feet Area of Impact acres Site 1 (13+86) UT of South Creek Box Culvert Extension Perennial 4' 10' 0.00092 Site 2 (24+75) UT of South Homin reek Culvert Extension Intermittent 1' 10' 0.00023 Total Stream Impact (by length and acreage) 20' 0.00115 Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic ocean and any other water of the U.S.). Open water impacts include, but are not limited to fill, excavation, dredging, flooding, drainage, bulkheads, etc. Page 4 of 9 Open Water Impact Site Number indicate on ma Name of Waterbody (if applicable) Type of Impact Type of Waterbody (lake, pond, estuary, sound, bay, ocean, etc. Area of Impact acres N/A Total Open Water Impact (acres) N/A 6. List the cumulative impact to all Waters of the U.S. resulting from the project. Stream Im act acres : 0.00115 Wetland Impact acres): 0.0 Open Water Impact (acres : 0.0 Total Impact to Waters of the U.S. acres 0.00115 Total Stream Impact (linear feet : 20' 7. Isolated Waters Do any isolated waters exist on the property? ? Yes ® No Describe all impacts to isolated waters, and include the type of water (wetland or stream) and the size of the proposed impact (acres or linear feet). Please note that this section only applies to waters that have specifically been determined to be isolated by the USACE. 8. Pond Creation if construction of a pond is proposed, associated wetland and stream impacts should be included above in the wetland and stream impact sections. Also, the proposed pond should be described here and illustrated on any maps included with this application. Pond to be created in (check all that apply): ? uplands ? stream ? wetlands Describe the method of construction (e.g., dam/embankment, excavation, installation of draw-down valve or spillway, etc.): Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond, local stormwater requirement, etc.): Current land use in the vicinity of the pond: Size of watershed draining to pond: Expected pond surface area: VII. Impact Justification (Avoidance and Minimization) Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide information related to site constraints such as topography, building ordinances, accessibility, and financial viability of the project. The applicant may attach drawings of alternative, lower-impact site layouts, and explain why these design options were not feasible. Also discuss how impacts were minimized once the desired site plan was developed. If applicable, discuss construction techniques to be followed during construction to reduce impacts. The existing secondary road must be improved to meet current safety standards for paved roads. The culvert extensions requested are the minimum necessary to establish an appropriate typical section for the roadway. Page 5 of 9 Riparian vegetation will be established on disturbed areas associated with the Project construction. VIII. Mitigation DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC Division of Water Quality for projects involving greater than or equal to one acre of impacts to freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial streams. USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide Permits, published in the Federal Register on January 15, 2002, mitigation will be required when necessary to ensure that adverse effects to the aquatic environment are minimal. Factors including size and type of proposed impact and function and relative value of the impacted aquatic resource will be considered in determining acceptability of appropriate and practicable mitigation as proposed. Examples of mitigation that may be appropriate and practicable include, but are not limited to: reducing the size of the project; establishing and maintaining wetland and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of aquatic resource functions and values by creating, restoring, enhancing, or preserving similar functions and values, preferable in the same watershed. If mitigation is required for this project, a copy of the mitigation plan must be attached in order for USACE or DWQ to consider the application complete for processing. Any application lacking a required mitigation plan or NCEEP concurrence shall be placed on hold as incomplete. An applicant may also choose to review the current guidelines for stream restoration in DWQ's Draft Technical Guide for Stream Work in North Carolina, available at http_//h2o.enr.state.nc.us/ncwetlands/stnngide.htm1. Provide a brief description of the proposed mitigation plan. The description should provide as much information as possible, including, but not limited to: site location (attach directions and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet) of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view, preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a description of the current site conditions and proposed method of construction. Please attach a separate sheet if more space is needed. We request that mitigation not be required for the culvert extension at Site 2 (24+75) due to the low quality of the associated unnamed tributary of South Hominy Creek. We propose to utilize the Ecosystem Enhancement Program (EEP) for the mitigation requirements for Site 1 (13+86) and if applicable, Site 2. NCDOT will be coordinating with the EEP to obtain the appropriate mitigation credits. 2. Mitigation may also be made by payment into the North Carolina Ecosystem Enhancement Program (NCEEP). Please note it is the applicant's responsibility to contact the NCEEP at (919) 715-0476 to determine availability, and written approval from the NCEEP indicating that they are will to accept payment for the mitigation must be attached to this form. For Page 6 of 9 additional information regarding the application process for the NCEEP, check the NCEEP website at http://h2o.enr.state.nc.us/wW/index.htm. If use of the NCEEP is proposed, please check the appropriate box on page five and provide the following information: Amount of stream mitigation requested (linear feet): Amount of buffer mitigation requested (square feet): Amount of Riparian wetland mitigation requested (acres): Amount of Non-riparian wetland mitigation requested (acres): Amount of Coastal wetland mitigation requested (acres): IX. Environmental Documentation (required by DWQ) Does the project involve an expenditure of public (federal/state/local) funds or the use of public (federal/state) land? Yes ® No ? 2. If yes, does the project require preparation of an environmental document pursuant to the requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)? Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA coordinator at (919) 733-5083 to review current thresholds for environmental documentation. Yes ? No If yes, has the document review been finalized by the State Clearinghouse? If so, please attach a copy of the NEPA or SEPA final approval letter. Yes ? No ? X. Proposed Impacts on Riparian and Watershed Buffers (required by DWQ) - N/A It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to required state and local buffers associated with the project. The applicant must also provide justification for these impacts in Section VII above. All proposed impacts must be listed herein, and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ Regional Office may be included as appropriate. Photographs may also be included at the applicant's discretion. 1. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233 (Meuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 02B .0243 (Catawba) 15A NCAC 2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please identify, )? Yes ? No 2. If "yes", identify the square feet and acreage of impact to each zone of the riparian buffers. If buffer mitigation is required calculate the required amount of mitigation by applying the buffer multipliers. Zone* Impact (square feet) Multiplier I Required Mitigation I 3 (2 for Catawba) Page 7 of 9 * Zone I extends out 30 feet perpendicular from the top of the near bank of channel; Gone 1 extends an additional 20 feet from the edge of Zone 1. 3. If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e., Donation of Property, Riparian Buffer Restoration / Enhancement, or Payment into the Riparian Buffer Restoration Fund). Please attach all appropriate information as identified within 15A NCAC 213.0242 or.0244, or.0260. XI. Stormwater (required by DWQ) Describe impervious acreage (existing and proposed) versus total acreage on the site. Discuss stormwater controls proposed in order to protect surface waters and wetlands downstream from the property. If percent impervious surface exceeds 20%, please provide calculations demonstrating total proposed impervious level. The existing compacted gravel roadway acts as an impervious surface Paving of the roadway should eliminate sedimentation from fines associated with gravel surface treatment. The roadway surface will be 40% of right of way acreage Stormwater will be diverted through settling basins or grass lined buffers prior to entering the streams XII. Sewage Disposal (required by DWQ) Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of wastewater generated from the proposed project, or available capacity of the subject facility. XIII. Violations (required by DWQ) Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer Rules? Yes ? No Is this an after-the-fact permit application? Yes ? No XIV. Cumulative Impacts (required by DWQ) Will this project (based on past and reasonably anticipated future impacts) result in additional development, which could impact nearby downstream water quality? Yes ? No If yes, please submit a qualitative or quantitative cumulative impact analysis in accordance with the most recent North Carolina Division of Water Quality policy posted on our website at http://h2o.enr.state.nc.us/ncwet]ands. If no, please provide a short narrative description: Page 8 of 9 XV. Other Circumstances (Optional): It is the applicant's responsibility to submit the application sufficiently in advance of desired construction dates to allow processing time for these permits. However, an applicant may choose to list constraints associated with construction or sequencing that may impose limits on work schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and Threatened Species, accessibility problems, or other issues outside of the applicant's control). With regard to hazardous spill basins the road is not classified as an arterial route; therefore hazardous spill basins are not required 9 Applicadt/Agent's Signature ' Date Agent's signature is valid only if an authorization letter from the applicant is provided.) Page 9 of 9 082' 43'0.00" W 082'42'0.00" W 082' 41'0.00" W r } r 7 ? N t ?/?ir, ? L.' ?' i I .•?• •?' •>!t ?r? ? t`? ? ? ? -rs_._?"; i ?/'..?7 rtl-? 1 N?• ? •.d '4i • -- _. (Ir10? .• ?_. ..., }, _? --. tr 1J? •%. N.... ?/ Jr \a r?'c ,,• $o p? u,, - ? it ?. i ;?+lr .tom _ n '-. , tr I ,,r? ? ?'??./ Y• r?El? ? '//--?? ?r ? ? ? ? '' k?" Atli" 1 7 ,: rr /? ?'}? ', \` ? 'IS? Slte 1 ?1?V'- ?:. 1, ?'?_, t ?'ti? ? :? 4 r t i ? ? ti I . r 2j ? ? . ! "s.•' r rr „.. :,? •f wa, rr ? y/ P10 U lljt { • q S .? n.t a - fi _ n+ • i kli, i _ l ???? ; i i???-J?r •?.-. !/,ll -? t- ? ?.-.. f !/-ti' {R4'',y4 i I'. r u 6- W 082' 43'0.00" W 082' 42'0.00" W 082' 41'0.00" W z g 0 Cf) 0 Z 8 O N co M O Z 8 M M 0 Name: ENKA Location: 035' 31'37.79" N 082' 42'06.72" W Date: 8/22/2005 Caption: SR 1122 Old Pisgah Hwy (aka Brendell), Buncombe County, Scale: 1 inch equals 2000 feet North Carolina Copyright (C) 1998, Maptech, Inc. Photos: Site 1 : Concrete Box Culvert Extension -SR 1122, Buncombe County, NC. Photo 1: A view of the upstream section. Photo 2: A view of the downstream section. I! Photos: Site 2: Pipe Culvert Extension -SR 1122, Buncombe County, NC. Photo 1: A view of the upstream section. Photo 2: A view of the downstream section. N.C. DEPARTMENT OF TRANSPORTATION DIVISION OF HIGHWAYS SECONDARY ROAD SURVEY SUBJECT: SR 1122 Old Pisgah Hwy (a.k.a. Brendeil? LOCATION: From EOP to EOM WORK TYPE: Grade, Drain, Base & Pave WORK ORDER: 13C.011086 PRIORITY: 52 COUNTY: Buncombe TOWNSHIP: Upper Hominy DATE: 02-14-05 SCALE: 1"=50' NOTES: 45' R/W .29 mi. PREPARED BY: JPR (: STATE OF NORTH CAROLINA DIVISION OF HIGHWAYS EROSION SYMBOLS ?TD # DESCRIPTION 45.03 TEMPORARY SILT DITCH --------------------------------------------- rsD '45.05 TEMPORARY DIVERSION ---------------------------------------------- ro -?. 93.01 TEMPORARY SILT FENCE --------------------------------------------- 190.05 TEMPORARY SLOPE DRAIN WITH EARTH BERM ------------------ -I '45.01 SILT BASIN TYPE A --------------------------------------------------------------- -O '45.02 SILT BASIN TYPE B -------------------------------------------------------------- 192.04 TEMPORARY ROCK SILT CHECK TYPE A ------------------------------ TEMPORARY ROCK SILT CHECK TYPE B ------------------------------- - 192.01 TEMPORARY ROCK SEDIMENT DAM TYPE A ----------------------- ® 192.02 TEMPORARY ROCK SEDIMENT DAM TYPE B ------------------------ - 197.01 ROCK PIPE INLET PROTECTION --------------------------------------- ---- - 94.01 ROCK SILT SCREEN --------------------------------------------------------------- -' 45.04 STILLING BASIN --------------------------------------------------------------------- -® 48.01 RIP RAP ----------------------------------------------------------- ------- RR DITCH LINER ----------------------------------------------------------- ENVIRONMENTALLY SENSITIVE AREA------------------------------ PIPE OUTLET ENERGY DISSAPATOR --------------------------------------0 EROSION CONTROL MATTING ----------------------------------- ECM FIBER GLASS ROVING ----------------------------------- -----• FGR SILT CHECK DAM TYPE-A ------------------------------------------------------- O SILT CHECK DAM TYPE--B------------------------------------------------------- O N C N N :- z cn c n N T m w w w N N w N wwwwwwo - (p x in a io cn x N ? C L O t0 N O m L C E Ul M O U m E O Q d E m d d L o o m ? € 'a °y m L c M y 3 3 m o ? O Z c a a SQ c c N lr? E ?i N N '? O 7 " N O M ? L O O N Or 0 Ol C - OI _ D y y C 0 ? E m ? c O II Cr Qi C 11 tll ' An _ N N M N d } N d? N 3 d C d N = N d M C y o w ? Q Q T 3 L O) N 'a 32 c O N O N a N ? U 3° C V T LO 00 rn w m W L) d U C N N m 0 Go 1) Of n N N N N m u m v r-- v rl- h 0 0 0 0 0 0 0 0 0 0 0 0 0 0 m d Q . N y N "GO r0 O N N O rn°DOrnnG10fr7 Q N co N c'7 N to N L -e N C O N 12 L2 O v y N N7 N N O 'J V u?Inrnlnrnv?? O N S _ S ° .0 N CO 0" }}}}}}? w L rn O) N d W d W ? ?Q-. J J J J J a> J T t « L m _N C N c d; O. n «? 7 ccncgoa ina 3 M ? N OOi V N m ;t cn - N N N N N O O O g 0« 0 0 N O N rn O p v O M co O cp + + + + + + + O ^ V O N " N N N C? C C C C N N N N N y 0 O O O O E c v c c c cy5 c 'ux E y U U c U U U Eo L o; .2 y o o o 06 U U N w C N 0 N 3 ID 0 0 0 0 0 0 ? p W U) I V) w w in W in U L C O O O M 0 1) 0 0 0 U .V ? M ? n M M in `L N c am f0 M ?-- M I? N '7 ? M ? a ? N O to O N O N 00 M O w w w O 00" fn vNN NN 0 0 0 .2 0 0 0 0! 2 to Ln 05 O m O 0 05 a0 co Go co O t c Y N O. + f. . ?-' •- N N N EROSION CONTROL PLAN SHEET Silt fences and temporary silt ditches shall be installed after clearing and before grading. Temporary stone ditch checks shall be installed as soon as ditch line is established. Pipe outlet and inlet protection will be done as soon as the pipe is installed. Silt basins (Type B) will be constructed to the dimension of nine feet by three feet by two feet unless otherwise noted on plans. (See SB-9 on dimension sheet) Seeding and other permanent erosion control measures are to be implemented as soon as practical. Temporary rock silt checks (Type B) will be spaced as required by percent of grade. PIPE INSTALLATION NOTES 1) Install erosion control devices. In streams, where necessary, rock silt screens will be used. 2) Remove material and existing pipe while limiting, as much as possible, material and sediment from entering the stream and/or escaping from the project. 3) Prepare pipe foundation while again taking care to limit, as much as possible, material and sediment from entering the stream and/or escaping from the project. Where possible, new grade will be below the existing streambed. If needed, bedding material will be clean stone. 4) Place the new pipe and compact backfill. 5) Install slope protection on outlet and inlet ends of pipe. Also complete installation of erosion control measures and perform maintenance as needed on existing measures. 6) Establish permanent vegetation as soon as possible. ROADWAY DITCH AND MEDIAN LINING GUIDELINES Percent of Grade Type of Lining Recommended 0%---- Straw And Tac 1 % ---- 2% Erosion Control Matting 3% ---- 4% Erosion Control Matting 5% ---- Greater Stone Stage Seeding: The work covered by this section shall consist of the establishment of a vegetative cover on cut and fill slopes as grading progresses. Seeding and mulching shall be done in stages on cut and fill slopes which are greater than 20 feet in height or greater than 2 acres in area. Each stage shall not exceed the limits stated above. PIPE OUTLET ENERGY DISSIPATOR: A pipe outlet energy dissipator shall be used at pipe outlets to slow the water velocities when it exits the pipe and flows out ditched or natural waterways. It is an apron of stone of a sufficient thickness to protect the outlet area from scouring out and causing'off-site sedimentation damage. Pipe outlet energy dissipators should be built according to the guideline chart shown on page VIII-3 of this manual. _ AREAS OF USE: • Outlets of pipes and culverts to prevent scouring. DESIGN CRMRIA: • In accordance with chart on page VIII-3. • Filter fabric, or six inch layer of gravel, shall be used under stone. MATERIALS : • Filter fabric shall meet requirements of section 1056 of Standard Specifications for Roads and Structures, January 1, 1990, for type II filter fabric. VI-34 March, 1993 A d m C Q L cc U o =c cis 04) ao C. Z ' Q A? W C b C O ? WO m a 0- ?..a VI-35 ltz V C d CO ?. 0 f? a Au ? s Q C 0 d C0 L. O cz Q. cn 0 2) W a? O CL ^ ? v C ? O 0 0 0 0 h 0 moo ;v '? ;? u 3 ? r» a3AC/) 160 MWh.19§3 l. DESIGN FOR' ( S.6.6 ) 3' 2' SILT BASIN NOT TO SCALE CHECK EVERY STORM SENT AND CLEAN OUT WHEN HALF FULL. 600 CUBIC FEET PER ACRE. °Ir?? (S-8-7) zY? 3'A (S.B. 21) r ??? 2-W 2' ( S.B. 28 ) i 3' 2' ( S.B. 9 ) LENGTH OF DISTURBED AREA 3' r 14' 21 1 (: (S-8-14 ) LENGTH OF DISTURBED AREA LENGTH OF DISTURBED AREA LENGTH OF DISTURBED AREA i I i SILT BASIN TYPE-B: A silt basin type-B is a temporary basin built to collect sediment flowing through a drainage way. The silt basin is built at the base of the ditch with its length being at least 2 times the width of the basin. The type-B silt basin is generally built in conjunction with temporary rock silt checks and other devices that control or slow down water flow. This device must be monitored closely and cleaned out on a regular basis until grass is established along the ditch line and sedimentation is no longer a problem. AREAS OF USE: • In conjunction with temporary rock silt checks and other devices used in drainage ditches. DESIGN CRITERIA: Width - variable Length - 2 times width Depth - 2 ft. minimum storage - 1800 cubic feet/acre (equals L x W x D) 23 March, 1992 Im ° F v I N ;,)'?a? ???, IIIII II I III ? ,\,;"\, '). ` : ?` ) ` ' II I ? IIII ; ?? : ; ;; i• 4 ? I I ? - ) .j ?" \y?:.i ?\`: ay\ d S 111111 m v,v? ?)ry ?wi ? i ' "\''' '? `? IIII z;rl %An I ` ` III 11 ` a L,LjLP? ) ) IIIII '='z m N t IIIII ?- o-- J ;y ?,?,,:, J __ ? IIIII W ?, zz? _ • y 'I ° F IIIII Z v \?" Hill 1111111= u W A r 'WA II - III ' ? IIIII ? III II ? ? \ ", I I ? ' y ` :;)i a 111 I ; 11111 v, FI ZI CI 1\ ? a; ;. = I ? E c%I i. _ cl d zl 24 March,1992 TEMPORARY SILT DITCH: TSD A temporary silt ditch shall be used in place of silt fence in many situations. Temporary silt ditches shall be used at the toe of fill slopes to divert runoff into sediment basins, temporary rock sediment dams, temporary rock silt checks and/or other sedimentation control measures. Temporary silt ditches are approximately 1 ft. deep, 2:1 side slopes with an optional earth berm. AREAS OF USE: • Toe of fill slopes where fill exceeds 3 ft in vertical height. • Along streams to intercept flow and/or divert to a controlled outlet. 13 March, 1992 >i p?fM zim f?N U E-- a cn d d ,. Z. w r o? 0 d 0 Q `' Z F , ? F---I LL Z Z m / Do W zZ w O .. Q Jam. > 0 C l r n Q ? o a Q i 0 ? w Q ? Z Q cn ? o Ct o J kCz zl a ?. f G O L.? B j ?" R I l ? n C zl.x 1 4 March, 1992 TEMPORARY SILT FENCE: A temporary silt fence is commonly used at the toe of a fill section to prevent off- site sedimentation. It is made of permeable filter fabric buried at the bottom, stretched and supported by steel posts. The silt fence reduces the water flow while retaining the sediment. They may also be used to divert water flow to protected outlets. Silt fences need to be checked after each significant rainfall to ensure there effectiveness. They must be maintained on a regular basis. Silt fences shall n= be installed across streams, ditches, or waterways. AREAS OF USE: • At toe of fill sections where sediment runoff can be stored and contained inside the project limits. DESIGN CRITERIA: Material With Wire Without Wire Fabric Type 3 Class A Type 3 Class B Steel posts length 5 ft 5 ft. Post spacing 10 ft. 6 ft. maximum 17 March, 1992 C2 33 2 ~ O 32 x3 ? X m Q CD I wx ?Z x U 0 .., ¢ f-- C7 Cr_ W Z N ¢m w _j -J O --? _O = O ? QZ m? c" W ?CD Q o F-- 0 0- Co _ LL) o m ¢ J J o= HN U 0 m LL m w J LL W cc: 3 Cr_ Co Li. Cr Ix ~ w3 F- O J LL ¢ J J 0 w I- U Q. x O U o L z _? I I 1 ' I m m I " - : ?' =1 z mw I I --------- ---- - ---- ,L_ , - --? O ------- ---- I Z 0 0 ?- z z - io -•? W W X.. W3 ¢ Cr_ w 2 M cc Z W 0 W W z ,? 3 z I- ¢ 2 _ Z ¢ ¢ V) ¢ m 2 m LL j fV Co J O W ¢ w w (n CD = 2 _j 2: z m L f) J LLJ m ¢ J U) ¢ 2: 0 -j W z J P 2 a 3 V) Z I- w¢ w Lei J J cc W m = N cnW U S¢= u m 0 >- 3: LLJ D: Cr ?- ° F-- CO 0 w m ?- N J 2 Z 3 ¢ ¢ 0} (n LL 3 ¢mo O J w F- ¢ Lr) ? w w 2 Z ?-• Q m z 0 0 - w w ~w a. F- cn o0 D_ Z .? J ? z Z C I w 0 M 0 3 3 cD V) LL J U. ¢ LL cn a: N . CD J L7 0 3 0 w ZLL •. o 0- LL ¢... cn o LL 0 w s z ¢ Z.. ¢ 0 z - 0 a wm LL 0 C -. zm Q r? 1~i! to °° LLI Z LLJ LL _J crn ca BTU >- UC?z Q `'C'TT 00 Cw CL Z a OZ D W ~ w>_ p 1-C Q Cn Z Q U) O .O N t I! VI-7 March, 1993 ROCK SILT SCREEN: 3 A rock silt screen is a low-level dam structure to be used in streams below culvert sites. Rock silt :screens shall be used to trap sediment transported by iunning water; and shall be placed'iii-the stream below the construction site within Wi -right-of- -' way.or easement boundary..The rock silt screen utilizes class B stone lined with ##5 ,.or #57 stone to produce a ripple-effect in the stream to settle the larger sediment particles transported in the stream from the construction site. The trapped sediment shall be cleaned out before the device is removed from the streamr.- - - AREAS OF USE: • In live streams below construction sites where construction occurs in or adjacent to the stream. • In live streams below a culvert construction site. • Where it can be cleaned before it is removed from stream. DESIGN CRITERIA: Structural stone - class B stone Sediment control stone - # 5 or # 57 Dam height - 1.5 ft. minimum and 3 1 ft. above normal flow of stream) stone ft. maximum ( shall not be higher than VI-24 March, 1993 1 ?l w, > 0 m co co 0 W a r? ca E' z x AE'c.??z zo?a?z d?? En zzE- °-O a. W AE O WDd¢Wtn v1o E-: w a zv2a zmQA C) (? W M 0 W. W O Cs V) fwd "]WV)--ru Ou??UZW W Cap d jW VaOWZ0WHZOQOZ Er z E C4 00owwZE-. WN?W> 000 dtl.0m 0 W E?W- 3 E.- ?- V)0 Wd[404X 7d? Oto WO?.00"aV) Z ZFOfxzd fEs-'G' ?UfnUE-V 0fnCs.CL? fn .rC? w w . M LL X S o Z F- t W 4 ! A! y (n V) .. ; ' ,. 0 N L U r . tX • VI-25 11/tewnt 1 M9 .z w . .w U (1) I- e z J f, ^ H O ? U V 3 x=Z U 0 0 0 ? 0 . cx. O v, 0 L•`> _ ?C C.) cn z Q O h TEMPORARY ROCK SEDIMENT DAM TYPE-B: U A temporary rock sediment dam type-B is a small dam structure with a weir outlet and a built-in sediment basin. Type-B temporary rock sediment dams shall be used in drainage ditches to detain sediment-laden runoff and to trap sediment to protect receiving streams and adjacent property. The type-B temporary rock sediment dams utilize class-B stone lined with #5 or #57 stone in conjunction with a built in basin to trap sediment. They shall not be used in live streams. AREAS OF USE: • At outlets of temporary diversions, temporary silt ditches, channels, and temporary slope drains. • In locations where the dam can be cleaned and maintained on a regular basis. • In locations where runoff is exiting the construction site. • In small natural drainage turnouts. DESIGN CRITERIA: DRAINAGE AREA acre 1 2 3 4 5 MINIMUM WEIR LENGTH 4.0 6.0 8.0 10.0 12.0 • Storage capacity - 1800 cubic ft./ acre to be cleaned out when half full (approximately 3-4 times a year). • Side slopes - 2 :1 (or flatter). • Structural stone - class B stone. • Sediment control stone - #5 or #57 stone. • Length of apron - approximately height of dam. 31 March, 1992 TEMPORARY ROCK SILT CHECK TYPE-B: ' A temporary rock silt check type-13 (also called check dam) is a small-dam with weir used to reduce gullying in drainage ditches that are to be filled or a permanently stabilized at a later date. These type-B rock silt checks help reduce the flow velocity and are generally made of class-B stone. They are used in during construction where the grade meets and/or exceeds 3%. ditches AREAS OF USE: • In channels, roadside ditch outlets, temporary silt ditche diversions. s, and temporary • In conjunction with type-13 silt basins. DESIGN CRMRIA: • Center of rock silt check shall be at least 1 foot lower than the outer ed es (top of channel sides) g 0 The spacing (ft.) = (3 / % of ditch grade) X 100 ft. W I- co u W Q J O . J ? (n020zz ?(n000 - W mZOW~(!) oz=(ro JUaF-W(r. Q-w ° ¢ N m UOm WO OCCW• Z a: Ln LL C.W (n 2 W0W(,o z (1) QOF-OQ U F- (n CY J -- •.-, F- J OUQZNU z mw ? ?-?O. .. O J o J = O U O Q. U CC > u O J L- O Ll. O CL. O Z F- w W 3 _W Q J a L- VI 17 Ma *rl, t nee u O W a z > z j W I w I. ? , 0 J m i (.n Q w a m ij-u r i QU) Z 0 ° u 0 . z O , F- U •-, z / U w (n 0 x _ N O (1) LLJ ;I? (n (n W N U %n U ? ? U C ` rTn v ?Q 2 m co i L-ii F-- U LLJ U J z„ C17 C > ?r CD ., p >- -ZQ °- • CD Q° CL x Li F-- cr- Q ?I Q , 1 ? o a . a Nc DoT R/w WOODS s?f ?(` 3 ? $RATICH m IiZZ PG. HENRY M, PINTO -3q.4%/S4-- p R- ' C"Ap NErJ RY ?. ,j7-0 P aa+8 540 113 I • Q I •I i 0 t ?- - ' lo, GR DR, lit ' ?>S ?RoP, 25" IS''CMP Z'x 3'x G' I I • HiGHPO NT 11 t 32 • III nq I? • E. O. P lotto 5 9.5 e MARY CLEVINC-ER Zib5/1(o 20 I io I ' 2,3?G e CARL R. ? DEBoRA K, MENTELE • Z(, 51 ?-90 r 4 •I 9 I , to II ? ? 2 Y. zi?3?6 I I: NC-DoT 194-51500 WOODS Z 7y )0 SOIL. DR,? 4? K IS??r:MP ? RCPIAce -'s IU • 3 I 0f 3 N Q I I I 18 to It 7 to 10 I 5 10 I oC P ?POP, So'x I!a"C IIzz PG.2 FOODS R HENRY M. PIN To 3644 / 5415 W0005 R 2Z PG.3 4ET?AESQ?4 MASS . RAPT. ?f?'' 10'GP,DQ. 2 5 - - TRUSTEE S Zo5V/651 15'GR. DR. FoLSt?MER Oar. R?''? TyP ? 3o?x 18?_ R F?TEpJD 10' Zoif IS c r ' 35x IS?GMP ? r ' I RE P(A ( I. ID ASPNAwT Pi,* I I2 io 4 a 3i I I • ,?EFF ? ?REr??R r1EDMONO ? ? I I 1308/ + 4- i .I I `Z 3 I IL R N?cr+PauT • ? y v l I , PASTURE Z I „a, • 3'62RNcN ?1 \ j A8Aro0uNE l ? CARL R, 0E8044 K , MENTELE JACNRY M, PINTO 3ro 48 / 540 PROPO seo 5o'x S' CM P ID Gk DR. 30 Is "c Akp kftVE Z- -0 SR tizZ j \oNC MASONRY rot. SETHESDA MISS. 6APT. c4uRe.8 r4os-r e5 -1 ro nQ . 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