Loading...
HomeMy WebLinkAbout20130534 Ver 1_401 Application_20130513201 30534 CI M Kmley -Han M an A�odams, I nc. May 15, 2013 0 P 0 Box 33066 Raleigh, Mr. Thomas Brown 63 8 Carolina U.S. Army Corps of Engineers 3331 Heritage Trade Drive Suite 105 Wake Forest, NC 27587 Ms. Sue Homewood 401 /Wetlands Unit North Carolina Division of Water Quality 1650 Mail Service Center Raleigh, NC 27699 -1650 Re: Nationwide Permit No. 12 PCN Application for Mitchell WTP Clearwell Replacement Greensboro, NC Dear Mr. Brown and Ms. Homewood: On behalf of our client, the City of Greensboro Water Resources Department, Kimley -Horn and Associates, Inc. (KHA), is submitting the enclosed request to modify the Nationwide 12 Permit Application and Jordan Lake Buffer Authorization for authorization pursuant to Section 404 and 401 of the Clean Water Act to construct the above referenced project. The impacts to North Buffalo Creek will be temporary and the impacts to the buffer will be temporary except for a vegetated 20 foot -wide maintenance corridor. The following information is included with this PCN application submittal: • An application fee to the Division of Water Quality (DWQ) for $240 (DWQ only). • A Completed PCN Application • An Agent Authorization • Figures (A Vicinity Map, USGS Map, Soil Survey Map, and Impacts Map) • A Preliminary Jurisdictional Determination Package • An 11X17 Outfall Extension Profile Ly r_% @ E E MAY 1 7 2013 ' "ctr,.�..� _ rV ■ TEL 919 677 2000 FAX 919 677 2050 ❑ � ❑ IGmley -Hom and Associates, Inc. If there is any additional information you need or any way we can assist in expediting the processing of this application, please do not hesitate to contact me at (919) 677 -2971 Very truly yours, KIMLEY -HORN AND ASSOCIATES, INC. Todd St. John, P.E., LEED AP Enclosures ■ TEL 919 677 2000 FAX 919 677 2050 f ot wn Y Office Use Only: Corps action ID no. DWQ project no. Form Version 1.3 Dec 10 2008 Pre - Construction Notification PCN Form A. Appkant Information 1. Processing 1 a. Type(s) of approval sought from the Corps: ®Section 404 Permit ❑Section 10 Permit 1b. Specify Nationwide Permit (NWP) number:12 or General Permit (GP) number: 1c. Has the NWP or GP number been verified by the Corps? ❑ Yes ® No 1d. 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 N 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. El Yes ED No 1g. Is the project located in any of NC's twenty coastal counties. If yes, answer 1 h below. ❑ Yes ® No 1h. Is the project located within a NC DCM Area of Environmental Concern (AEC)? ❑ Yes ® No 2. Project Information 2a. Name of project: Mitchell WTP Clearwell Replacement 2b. County: Guilford 2c. Nearest municipality / town: Greensboro 2d. Subdivision name: N/A 2e. NCDOT only, T.I.P. or state project no: N/A 3. Owner Information 3a. Name(s) on Recorded Deed: City of Greensboro Ix 3b. Deed Book and Page No. Y 7 An 3c. Responsible Party (for LLC if applicable): City of Greensboro, Water Resources Department NR _ Wq 3d. Street address: 2602 S. Elm- Eugene Street 3e. City, state, zip: Greensboro, NC 27406 3f. Telephone no.: 336 - 373 -7898 3g. Fax no.: 336 - 412 -6305 3h. Email address: danny.briggs@greensboro-nc.gov Page 1 of 12 PCN Form — Version 1.3 December 10, 2008 Version 4. Applicant Information (if different from owner) 4a. Applicant is: ❑ Agent ❑ Other, specify: 4b. Name: 4c. Business name (if applicable): 4d. Street address: 4e. City, state, zip: 4f. Telephone no.: 4g. Fax no.: 4h. Email address: 5. Agent/Consultant Information (if applicable) 5a. Name: Todd St. John, P.E. 5b. Business name (if applicable): Kimley -Horn and Associates, Inc. 5c. Street address: 3001 Weston Parkway 5d. City, state, zip: Cary, NC 27513 5e. Telephone no.: 919 -677 -2000 5f. Fax no.: 919 -677 -2050 5g. Email address: Todd.StJohn @kimley - horn.com Page 2 of 12 PCN Form — Version 1.3 December 10, 2008 Version B. Project Information and Prior Project History 1. Property Identification 1a. Property identification no. (tax PIN or parcel ID): 1b. Site coordinates (in decimal degrees): Latitude: 36.081333 Longitude: - 79.803472 (DD.DDDDDD) (- DD.DDDDDD) 1c. Property size: (Project Boundary) 2.9 acres 2. Surface Waters 2a. Name of nearest body of water (stream, river, etc.) to North Buffalo Creek proposed project: 2b. Water Quality Classification of nearest receiving water: C; NSW 2c. River basin: Cape Fear 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: The site includes the City's existing N. L. Mitchell Water Treatment Plant that is being upgraded. The area surrounding the site is predominately urban residential and commercial. 3b. List the total estimated acreage of all existing wetlands on the property: Other than North Buffalo Creek itself there were no other wetlands or waters discovered on the site. 3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property: Other than North Buffalo Creek, there are no other streams on the property. See the attached maps. 3d. Explain the purpose of the proposed project: The purpose of this project is to upgrade the City of Greensboro's N. L. Mitchell WTP. The upgrades include a new 1 MG clearwell, upgrades to plant site piping, high service pumping facilities and piping, electrical fadlities, stormwater facilities, and the disposal of the backwash water and backwash to waste water ofisite, by extending a gravity collection system from the filter building facilities to a new backwash water and backwash to waste pumping station located on the plant site. From this pump station the City proposes to extend a large ( >241 force main from the plant site to the City's existing 54° North Buffalo Creek Interceptor located on the opposite side of North Buffalo Creek. 3e. Describe the overall project in detail, including the type of equipment to be used: The project construction approach is to excavate a temporary open -cut trench across North Buffalo Creek to install the force main. The force main will be connected to the City's existing 54° North Buffalo Creek Interceptor. Construction equipment typical for this type of pipe installation includes the use of a track mounted backhoe with rock teeth, front loader, and compaction equipment. After the force main is installed the open -cut trench will be backfilled with #57 stone bedding, concrete encasement, and suitable select backfill material in North Buffalo Creek and with #57 stone bedding and suitable select backfill in the Jordan Riparian Buffer. A 20 -foot wide corridor will be maintained and planted with grass. The remaining disturbed area within the Jordan Riparian Buffer will be planted with native tree species at 10 -foot centers. 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: 4b. If the Corps made the jurisdictional determination, what type ❑Preliminary El Final of determination was made? 4c. If yes, who delineated the jurisdictional areas? Agency /Consultant Company: Kimley -Hom and Associates, Inc. Name (if known): Jason Hartshorn Other 4d. If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation. The jurisdictional determination is being submitted concurrently with this application. 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. Multiple treatment plant components will be phased in to accommodate keeping the plant fully operational during construction. Page 4 of 12 PCN Form — Version 1.3 December 10, 2008 Version C. Proposed Impacts Inventory 1. Impacts Summary 1a. 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 W1 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ W2 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ W3 ❑ P [IT ❑ Yes ❑ Corps ❑ No ❑ DWQ W4 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ W5 ❑ P [IT ❑ Yes ❑ Corps ❑ No ❑ DWQ W6 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ 2g. Total wetland impacts 2h. Comments: No wetlands were discovered on the site. 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 intermittent DWQ — non -404, width (linear Temporary (T) (INT)? other) (feet) feet) S1 ❑ P ® T Temporary trench North Buffalo Creek ® PER ❑ INT ® Corps ❑ DWQ 48 40 S2 ❑ P ❑ T ® PER ® Corps ❑ INT ❑ DWQ 3h. Total stream and tributary impacts 40 31. Comments: An open cut trench will be made in North Buffalo Creek. But it will be backfilled with pipe bedding and other suitable material. 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 01 ❑P [IT 02 ❑P [IT 03 ❑P [IT 04 ❑ PC] T 4E Total open water impacts 4g. Comments: No open waters will be impacted by the proposed project. 5. Pond or Lake Construction If pond or lake construction proposed, then com lets the chart below. 5a. 5b. 5c. 5d. 5e. Wetland Impacts (acres) Stream Impacts (feet) Upland Pond ID Proposed use or purpose of (acres) number pond Flooded Filled Excavated Flooded Filled Excavated Flooded P1 P2 5E Total 5g. Comments: No ponds or lakes will be impacted by the proposed project. 5h. Is a dam high hazard permit required? ❑ Yes No If yes, permit ID no: 5i. Expected pond surface area (acres): n/a 5j. Size of pond watershed (acres): n/a 5k. Method of construction: Tr—lda 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 any impacts require mitigation, then you MUST fill out Section D of this form. 6a. ❑ Neuse ❑ Tar - Pamlico ® Other: Jordan Lake Project is in which protected basin? ❑ Catawba ❑ Randleman 6b. 6c. 6d. 6e. 6f. 6g. Buffer impact number — Reason for Buffer Zone 1 impact Zone 2 impact Permanent (P) impact Stream name mitigation (square feet) (square feet) or Temporary required? T 61 ❑ P ®T insta atil North Buffalo Creek ® Nos 2,471 1,728 B2 ❑P ❑T ❑Yes ❑ No 6h. Total buffer impacts 2,471 1,728 6i. Comments: All buffer impacts are temporary and will be restored using native tree and shrub species outside of a 20 -foot maintenance corridor. Where there is an existing sewer corridor, herbaceous vegetation will be utilized instead of native trees. Page 6 of 12 PCN Form — Version 1.3 December 10, 2008 Version and shrub species. D. Impact Justification and Mitigation 1. Avoidance and Minimization la. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project. The crossing will be perpendicular to minimize impacts. 1b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques. Tree protection fence will be placed along the construction corridor. 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 in4ieu 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: S. 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: The project will fall under the allowable category such that no mitigation will be required. 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: Stormwater will be discharged through unimproved existing ❑ Yes ® No conveyances. 2. Stormwater Management Plan 0 % The extension of the outfall 2a. What is the overall percent imperviousness of this project? will be completely subsurface upon completion. 2b. Does this project require a Stormwater Management Plan? ❑ Yes ® No 2c. If this project DOES NOT require a Stormwater Management Plan, explain why: The application is for a NW 12 and WQC 3884 does not specify stormwater management requirements other than those associated with the Jordan Lake Buffer Rules. All stormwater form the WTP will be discharged through existing conveyances. 2d. If this project DOES require a Stormwater Management Plan, then provide a brief, narrative description of the plan: The project does not require a stormwater plan since the application is for a NW 12. Additionally, no new stormwater will be discharged through the buffers except by existing, unimproved conveyances. ® 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? City of Greensboro, NC ® Phase II 3b. Which of the following locally-implemented stormwater management programs ❑ NSW ❑ USMP apply (check all that apply): ❑ Water Supply Watershed ® Other: Jordan Lake 3c. Has the approved Stormwater Management Plan with proof of approval been ❑ Yes ® No attached? Not required for NW 12 4. DWQ Stormwater Program Review ❑ Coastal counties 4a. Which of the following state - implemented stormwater management programs apply ❑ 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 Page 9 of 12 PCN Form — Version 1.3 December 10, 2008 Version 5b. Have all of the 401 Unit submittal requirements been met? ® Yes ❑ No F. Supplementary Information 1. Environmental Documentation (DWQ Requirement) 1a. Does the project involve an expenditure of public (federaUstate /local) funds or the ® Yes ❑ No use of public (federal/state) land? 1b. 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 ❑ Yes ❑ No letter.) Comments: n/a 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): n/a 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. The project will not result in an increase in capacity, only modernization and improved efficiency. 4. Sewage Disposal (DWQ Requirement) 4a. Cleary 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. The filter backwash will be to discharged filter backwash water into Greensboro's sewer system. Page 10 of 12 PCN Form — Version 1.3 December 10, 2008 Version S. Endangered Species and Designated Critical Habitat (Corps Requirement) 5a. Will this project occur in or near an area with federally protected species or ❑ Yes ® No habitat? 5b. Have you checked with the USFWS concerning Endangered Species Act ❑ Yes ® No impacts? ❑ Raleigh 5c. If yes, indicate the USFWS Field Office you have contacted. ❑ Asheville 5d. What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical Habitat? The U.S. Fish and Wildlife Service ( USFWS) database (updated 5/9/2013) was reviewed to determine any federally listed species identified for Guilford County. The small whorled pogonia (Isotria medeoloides) is listed as federally threatened for Guilford County. In North Carolina, this perennial orchid is typically found in open, dry deciduous woods and is often associated with white pine and rhododendron. This species is known to occur at sites that range from 2,000 to 4,000 feet in elevation. No suitable habitat for the small whorled pogonia is present in the study area based on vegetative communities and elevations. Elevations in the study area range from 740 to 750 feet above mean sea level as depicted on the Greensboro, North Carolina, USGS topographic quadrangle map. Additionally, the Natural Heritage Program database (accessed 05/09/2013) did not indicate any recorded occurrences of federally protected species within five miles of the study area. 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? The NOAA Essential Fish Habitat Mapper was reviewed on Monday, February 20, 2012 with no essential fish habitat found within the project area or within the vicinity of the project. 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 ® Yes ❑ No status (e.g., National Historic Trust designation or properties significant in North Carolina history and archaeology)? 7b. What data sources did you use to determine whether your site would impact historic or archeological resources? The State Historic Preservation Office database was reviewed (May 9, 2013) to determine if any historic resources occurred in the project boundary. There are no historic or archaeological resources within the project boundary. However, the map does show the project would cross into the West Market Terrace/Westerwood Historic District Study Area. Considering the nature of the immediate environs, and the fact that the outfall extension will be buried, there should be no impact to the area. There is an eligible bridge approximately 1000 feet from the project boundary as well. 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: The project will not alter the floodplain or floodway. 8c. What source(s) did you use to make the floodplain determination? NC Floodmaps Page 11 of 12 PCN Form — Version 1.3 December 10, 2008 Version Todd St. John AAk D ApplicanNAgenrs Printed Name Applicant; Agen 's 'nature (Agents signature is valid only if an auth anon letter from the applicant Is ovided. Page 12 of 12 PCN Form — Version 1.3 December 10, 2008 Version Letter of Authorization The City of Greensboro Department of Water Resources authorizes Kimley -Horn and Associates, Inc. to act as our limited agent to coordinate with the U.S. Army Corps of Engineers and North Carolina Division of Water Quality for the preparation and submittal of jurisdictional determinations and 404/401 permits applications associated with the Mitchell Water Treatment Plant located in Greensboro, North Carolina. Authorization will terminate on either final agency action or upon written notification from either parties involved. Owner Name: City of Greensboro Water Resources Department Contact Name:r Owner Address: 2602 South Elm- Eugene St. Greensboro, NC 27406 Owner Phone Owner Fax #: 33 (y 17- (03e5"' Owner Email: 6m cihw-ai -too ra)e �gQ kA4,��, ignature of C nt) Date! �dlewooa0` hj � eaR` oe' 6 A/ n co e'r►'no% yak CU O K� �e�1a��rP Q c a U Lakeview St Z Legend Q Project Area (U �s�ith 3t N ci ? U) 0 205 410 A — I i I Q CD 0 Feet Courtland St Z a Title Vicinity Map Prepared For: Mitchell Water Treatment Plant Project Guilford County, NC 0 Date Project Number Figure May 15 2013 1 011462021 1 jai A a, .l Title I NRCS Soil Survey (1977) Northwest Judd Parkway Soil Legend Map Unit Soil Unit Name H dric Ch Chewacla sandy clay loam No EuB Enon -Urban land complex 1 Ur Urban land No k A a, .l Title I NRCS Soil Survey (1977) Northwest Judd Parkway Soil Legend Map Unit Soil Unit Name H dric Ch Chewacla sandy clay loam No EuB Enon -Urban land complex No Ur Urban land No Prepared For: Mitchell Water Treatment Plant Project Guilford County, NC OWN Date Project Number Figure °°°° May 15 2013 011462021 4 ATTACHMENT PRELIMINARY JURISDICTIONAL DETERMINATION FORM BACKGROUND INFORMATION A. REPORT COMPLETION DATE FOR PRELIMINARY JURISDICTIONAL DETERMINATION (JD): B. NAME AND ADDRESS OF PERSON REQUESTING PRELIMINARY JD: Kimley -Horn and Associates, Inc. Attn: Todd St. John (P.E.), on behalf of the City of Greensboro P.O. Box 33068 Raleigh, NC 27636 C. DISTRICT OFFICE, FILE NAME, AND NUMBER: D. PROJECT LOCATION(S) AND BACKGROUND INFORMATION: (USE THE ATTACHED TABLE TO DOCUMENT MULTIPLE WATERBODIES AT DIFFERENT SITES) State: NC County /parish /borough: Guilford City: Greensboro Center coordinates of site (lat/long in degree decimal format): Lat. 36.08130 N, Long. 79.80340 W. Universal Transverse Mercator: 17 Name of nearest waterbody: Buffalo Lake Identify (estimate) amount of waters in the review area: Non - wetland waters: 398.4 linear feet; 45 width (ft) and /or 0.4 acres. Cowardin Class: Riverine Stream Flow: Perennial Wetlands: n/a Cowardin Class: n/a Name of any water bodies on the site that have been identified as Section 10 waters: Tidal: n/a Non - Tidal: n/a E. REVIEW PERFORMED FOR SITE EVALUATION (CHECK ALL THAT APPLY): ❑ Office (Desk) Determination. Date: ❑ Field Determination. Date(s): 1. The Corps of Engineers believes that there may be jurisdictional waters of the United States on the subject site, and the permit applicant or other affected party who requested this preliminary JD is hereby advised of his or her option to request and obtain an approved jurisdictional determination (JD) for that site. Nevertheless, the permit applicant or other person who requested this preliminary JD has declined to exercise the option to obtain an approved JD in this instance and at this time. 2. In any circumstance where a permit applicant obtains an individual permit, or a Nationwide General Permit (NWP) or other general permit verification requiring "pre- construction notification" (PCN), or requests verification for a non - reporting NWP or other general permit, and the permit applicant has not requested an approved JD for the activity, the permit applicant is hereby made aware of the following: (1) the permit applicant has elected to seek a permit authorization based on a preliminary JD, which does not make an official determination of jurisdictional waters; (2) that the applicant has the option to request an approved JD before accepting the terms and conditions of the permit authorization, and that basing a permit authorization on an approved JD could possibly result in less compensatory mitigation being required or different special conditions; (3) that the applicant has the right to request an individual permit rather than accepting the terms and conditions of the NWP or other general permit authorization; (4) that the applicant can accept a permit authorization and thereby agree to comply with all the terms and conditions of that permit, including whatever mitigation requirements the Corps has determined to be necessary; (5) that undertaking any activity in reliance upon the subject permit authorization without requesting an approved JD constitutes the applicant's acceptance of the use of the preliminary JD, but that either form of JD will be processed as soon as is practicable; (6) accepting a permit authorization (e.g., signing a proffered individual permit) or undertaking any activity in reliance on any form of Corps permit authorization based on a preliminary JD constitutes agreement that all wetlands and other water bodies on the site affected in any way by that activity are jurisdictional waters of the United States, and precludes any challenge to such jurisdiction in any administrative or judicial compliance or enforcement action, or in any administrative appeal or in any Federal court; and (7) whether the applicant elects to use either an approved JD or a preliminary JD, that JD will be processed as soon as is practicable. Further, an approved JD, a proffered individual permit (and all terms and conditions contained therein), or individual permit denial can be administratively appealed pursuant to 33 C.F.R. Part 331, and that in any administrative appeal, jurisdictional issues can be raised (see 33 C.F.R. 331.5(a)(2)). If, during that administrative appeal, it becomes necessary to make an official determination whether CWA jurisdiction exists over a site, or to provide an official delineation of jurisdictional waters on the site, the Corps will provide an approved JD to accomplish that result, as soon as is practicable. This preliminary JD finds that there "may be" waters of the United States on the subject project site, and identifies all aquatic features on the site that could be affected by the proposed activity, based on the following information: SUPPORTING DATA. Data reviewed for preliminary JD (check all that apply - checked items should be included in case file and, where checked and requested, appropriately reference sources below): ® Maps, plans, plots or plat submitted by or on behalf of the applicant/consultant: ® Data sheets prepared /submitted by or on behalf of the applicant/consultant. ❑ Office concurs with data sheets /delineation report. ❑ Office does not concur with data sheets /delineation report. ❑ Data sheets prepared by the Corps: ❑ Corps navigable waters' study: ❑ U.S. Geological Survey Hydrologic Atlas: ❑ USGS NHD data. ❑ USGS 8 and 12 digit HUC maps. ® U.S. Geological Survey map(s). Cite scale & quad name:1:24,000 — Greensboro Quad. ® USDA Natural Resources Conservation Service Soil Survey. Citation: ❑ National wetlands inventory map(s). Cite name: ❑ State /Local wetland inventory map(s): ❑ FEMA/FIRM maps: ❑ 100 -year Floodplain Elevation is: (National Geodectic Vertical Datum of 1929) ® Photographs: ® Aerial (Name & Date):NC Orthoimagery Program (2010). or ❑ Other (Name & Date): ❑ Previous determination (s). File no. and date of response letter: ❑ Other information (please specify): IMPORTANT NOTE: The information recorded on this form has not necessarily been verified by the Corps and should not be relied upon for later jurisdictional determinations. Signature and date of Regulatory Project Manager (REQUIRED) 3 Signature and date of person requesting preliminary JD (REQUIRED, unless obtaining the signature is impracticable) Estimated Site Cowardin amount of Class of number Latitude Longitude Class aquatic aquatic resource in resource review area SA 36.0814 - 79.8033 Riverine 398.4 linear feet non - section 10 — non - tidal/ non - wetland c � � aoPA �dIeWOOd� h,�a 6eam A� m em�no% �r �a k �m •. rilam`rP� ge Q c Q� N U a� U Legend Lakeview St Z ^- Stream < CO Project Area t �s�ith St N 0 200 400 N 1 i I Feet Courtland St Z a Title Vicinity Map Prepared For: Mitchell Water Treatment Plant N Project Guilford County, NC Date Project Number Figure May 14 2013 011462021 1 �r Legend Stream Project Area N 0 150 300 1 1 I Feet r: N o Q a� v, — — ,,,,,. Title NRCS Soil Survey (1977) Prepared For: Mitchell Water Treatment Plant Project Guilford County, NC VO Date Project Number Figure fFVSra^ May 14, 2013 011462021 4 Northwest Judd Parkway Soil Legend p Unit Soil Unit Name Hydric Ch Chewada sandy clay loam No EuB Enon -Urban land complex No Ur Urban land No — — ,,,,,. Title NRCS Soil Survey (1977) Prepared For: Mitchell Water Treatment Plant Project Guilford County, NC VO Date Project Number Figure fFVSra^ May 14, 2013 011462021 4 North Carolina Division of Water Quality - Stream Identification Form, Version 4.11 Date: 5/8/2013 Project/Site: Mitchell WTP Latitude: 36.0812 N Evaluator: d Hartshorn (KHA) County: Guilford Longitude: 79.8032 W Total Points: 40.5 0 1 2 Stream Determination Other Greensboro Quad Stream is at least intermittent Ephemeral Intermitte Og Quad Name -2001 rf a 19 or rennial if 2 30 3 2 A. Geomorphology Subtotal = 23.5 Absent Weak Moderate Strong Score 1 a. Continuity of channel bed and bank 0 1 2 3 3 2. Sinuosity of channel along thalweg 0 1 2 3 2 3. In- channel structure: ex. riffle -pool, step -pool, ripple- ol se uence 0 1 2 3 3 4. Particle size of stream substrate 0 1 2 3 3 5. Active/relic flood lain 0 1 2 3 3 6. Depositional bars or benches 0 1 2 3 2 7. Recent alluvial deposits 0 1 2 3 2 8. Headcuts 0 1 2 3 0 9. Grade control 0 0.5 1 1.5 1.5 10. Natural valley 0 0.5 1 1.5 1 11. Second or greater order channel No = 0 Yes = 3 3 artificial ditches are not rated, see discussions in manual B. Hydrology Subtotal = 10 12. Presence of Baseflow 0 1 2 3 3 13. Iron oxidizing bacteria 0 1 2 3 0 14. Leaf litter 1.5 1 0.5 0 1.5 15. Sediment on plants or debris 0 0.5 1 1.5 1 16. Or anic debris lines or piles 0 0.5 1 1.5 1.5 17. Soil -based evidence of high water table? No = 0 Yes = 3 3 C. Biology Subtotal = 18. Fibrous roots in streambed 3 2 1 0 3 19. Rooted upland plants in streambed 3 2 1 0 3 20. Macrobenthos note diversity and abundance 0 1 2 3 0 21. Aquatic Mollusks 0 1 2 3 0 22. Fish 0 0.5 1 1.5 0.5 23. Crayfish 0 0.5 1 1.5 0 24. Amphibians 0 0.5 1 1.5 0.5 25. Algae 0 0.5 1 1.5 0 26. Wetland plants in streambed FACW = 0.75; OBL = 1.5; Other = 0 0 'perennial streams may also be identfied using other methods See p 35 of manual Notes: Recent flood as none were observed. Channel substrate is rocky with a bedrock protrusion near the data point. The stream is fast flowing and dear. Evidence of high flow events such as wrack lines, debris piles, and wrested vegetation were observed within the channel. Debris piles within the adiacent floodolain indicate overbank floodina occurs witin this reach. USACE AID# DWQ # Site # (indicate on attached map) M STREAM QUALITY ASSESSMENT WORKSHEET Provide the following information for the stream reach under assessment: 1. Applicant's name City of Greensboro 2. Evaluator's name 1. Hartshorn (KHA) 3. Date of evaluatio 05/08/2013 5. Name of stream: North Buffalo Creek 664 acres 4. Time of evaluatic 11:42 am 6. River basin: Cape Fear 7. Approximate drainage area: 8. Stream orde Third Order 9. Length of reach evaluated: 100' 10. County: Guilford 11. Site coordinates (if known): prefer in decimal degrees. 12. Subdivision name (if any): n/a Latitude (ex. 34.872312): 36'0812 N Longitude (ex. -77.556611): 79.8032 W Method location determined (circle):EiPSDopo Shee >QDrtho (Aerial) Photo /GISather GISather 13. Location of reach under evaluation (note nearby roads and landmarks and attach map identifying stream(s) location): Stream flows parallel to Benjamin Parkway, and crosses below Battleground Avenue east of project area. 14. Proposed channel work (if any) Open trench and regrade to pre - construction contours. 15. Recent weather conditions: Rainy, with 1.62" of rainfall recorded by NOAA/NWS 48 hours prior to field observations. 16. Site conditions at time of visit: Clear and sunny, approximately 70 degrees Fahrenheit. 17. Identify any special waterway classifications known: 12section 10 Tidal Waters Essential Fisheries Habitat nTrout Waters 00utstanding Resource Waters Q Nutrient Sensitive Waters 2Water Supply Watershed. (I -IV) 18. Is there a pond or lake located upstream of the evaluation point? NO If yes, estimate the water surface area n/a 19. Does channel appear on USGS quad map? NO 21. Estimated watershed land use: 65 % Residential 5 % Forested 22. Bankfull width: 4$ 24. Channel slope down center of stream: OFIat (0 to 2 %) 25. Channel sinuosity: Straight 00ccasional bends 20. Does channel appear on USDA Soil Survey? YES 30,/- Commercial _% Industrial _% Agricultural _% Cleared / Logged _% Other ( ) 23. Bank height (from bed to top of bank): 61 QGentle (2 to 4 %) OModerate (4 to 10 %) DSteep ( >10 %) 0Frequent meander Overy sinuous Braided channel Instructions for completion of worksheet (located on page 2): Begin by determining the most appropriate ecoregion based on location, terrain, vegetation, stream classification, etc. Every characteristic must be scored using the same ecoregion. Assign points to each characteristic within the range shown for the ecoregion. Page 3 provides a brief description of how to review the characteristics identified in the worksheet. Scores should reflect an overall assessment of the stream reach under evaluation. If a characteristic cannot be evaluated due to site or weather conditions, enter 0 in the scoring box and provide an explanation in the comment section. Where there are obvious changes in the character of a stream under review (e.g., the stream flows from a pasture into a forest), the stream may be divided into smaller reaches that display more continuity, and a separate form used to evaluate each reach. The total score assigned to a stream reach must range between 0 and 100, with a score of 100 representing a stream of the highest quality. Total Score (from reverse): 48 Comments: The thalweg of the stream is sinuous, but the features of the channel appear constrained and show evidence of erosional downcutting. A swift flow was observed, likely resulting from significant flow events. Evaluator's Signature Jason Hartshorn Date 05/08/2013 This channel evaluation form is intended to be used only as a guide to assist landowners and environmental professionals in gathering the data required by the United States Army Corps of Engineers to make a preliminary assessment of stream quality. The total score resulting from the completion of this form is subject to USACE approval and does not imply a particular mitigation ratio or requirement. Form subject to change - version 06/03. To Comment, please call 919- 876 -8441 x 26. North Buffalo Creek STREAM QUALITY ASSESSMENT WORKSHEET * These characteristics are not assessed in coastal streams. ECOREGION POINT RANGE # CHARACTERISTICS SCORE Coastal Piedmont Mountain 1 Presence of flow / persistent pools in stream 0-5 0 - 4 0-5 4 no flow or saturation = 0• strong flow = max points) 2 Evidence of past human alteration 0-6 0-5 0-5 1 extensive alteration = 0• no alteration = max po ints 3 Riparian zone 0-6 0-4 0-5 2 no buffer = 0• contiguous, wide buffer = max points) 4 Evidence of nutrient or chemical discharges 0-5 0-4 0-4 1 extensive discharges = 0• no discharges = max points) 5 Groundwater discharge 0-3 0-4 0-4 0 no discharge = 0• springs, sees wetlands etc. = max points) 6 Presence of adjacent floodplain 0-4 0-4 0-2 3 no floodplain = 0• extensive floodplain = max po ints 7 Entrenchment / floodplain access 0-5 0-4 0-2 2 (deeply entrenched = 0• frequent flooding = max points) 8 Presence of adjacent wetlands 0-6 0-4 0-2 0 no wetlands = 0• large adjacent wetlands = max points) 9 Channel sinuosity 0-5 0-4 0-3 2 extensive channelization = 0• natural meander = max points) 10 Sediment input 0-5 0-4 0-4 2 extensive deposition= 0• little or no sediment = max points) 11 Size & diversity of channel bed substrate NA* 0-4 0 - 5 4 fine homogenous = 0, a diverse sizes = max oints 12 Evidence of channel incision or widening 0-5 0 - 4 0-5 3 (deeply incised = 0• stable bed & banks = max points) 13 Presence of major bank failures 0-5 0 - 5 0-5 3 severe erosion = 0• no erosion stable banks = max points) 14 Root depth and density on banks 0-3 0 - 4 0-5 3 no visible roots = 0• dense roots throughout = max ints 15 Impact by agriculture, livestock, or timber production 0-5 0 - 4 0-5 0 substantial impact =0• no evidence = max point s 16 Presence of riffle- pool/ripple -pool complexes 0-3 0-5 0-6 4 no riffles/ripples or pools = 0- well- . ed = max oints 1 Habitat complexity 0— 6 0— 6 0— 6 4 little or no habitat = 0• frequent varied habitats = max points) 18 Canopy coverage over streambed 0— 5 0— 5 0— 5 3 no shading ve etation = 0• continuous canopy = max points) 19 Substrate embeddedness NA* 0-4 0-4 3 (deeply embedded = 0• loose structure = max 20 Presence of stream invertebrates (see page 4) 0-4 0 - 5 0-5 0 no evidence = 0. common, numerous types = max points) i 21 Presence of amphibians 0-4 0-4 0-4 1 no evidence = 0• common, numerous types = max points) 22 Presence of fish 0-4 0-4 0-4 1 no evidence = 0• common, numerous types = max ints 23 Evidence of wildlife use 0-6 0-5 0-5 2 no evidence = 0• abundant evidence = max points) Total Points Possible 100 X00 100 TOTAL SCORE (also enter on first page) 48 * These characteristics are not assessed in coastal streams. WETLAND DETERMINATION DATA FORM — Eastern Mountains and Piedmont Region Project/Site: Mitchell Wastewater Treatment Plant City /County: Guilford Sampling Date. 5/08/2013 Applicant/Owner: City of Greensboro State. NC Sampling Point: DPI Investigator(s): J. Hartshorn (KHA) Section, Township, Range: Morehead Township Landform (hillslope, terrace, etc.)- Slight hillslope Local relief (concave, convex, none): none Slope ( %): 1% Subregion (LRR or MLRA). I Let: 36.081400 N Long: 79.803300 W Datum: NAD83 Soil Map Unit Name: Ur - Urban Land & Ch - Chewacla sandy loam NWI classification Are climatic / hydrologic conditions on the site typical for this time of year? Yes FTi No= (If no, explain in Remarks) Are Vegetation Soil or Hydrology significantly disturbed? Are "Normal Circumstances" present? Yes EE No Are Vegetation Soil or Hydrology R naturally problematic? (If needed, explain any answers in Remarks.) SUMMARY OF FINDINGS — Attach site map showing sampling point locations, transacts, important features, etc. Hydrophytic Vegetation Present? Yes ✓ No ✓ Is the Sampled Area Hydric Soil Present? Yes No within a Wetland? Yes No IZI Wetland Hydrology Present? Yes ✓ No Remarks. DP1 is located in the geomorphic floodplain of North Buffalo Creek. Bank height of the adjacent channel is 6' and banks are steep, approaching vertical. DP1 is located approximately 40' northwest of the top of the left bank. NOAA/NWS recorded 1.62" of rainfall in the 48 hours prior to the field evaluation. HYDROLOGY Wetland Hydrology Indicators: Primary Indicators (minimum of one' required: check all that apply) i ondary Indicators (minimum of two reouired) Surface Soil Cracks (B6) Sparsely Vegetated Concave Surface (138) Drainage Patterns (B10) Moss Trim Lines (B16) Dry- Season Water Table (C2) Crayfish Burrows (C8) Saturation visible on Aerial Imagery (C9) Stunted or Stressed Plants (D1) Geomorphic Position (D2) Shallow Aquitard (D3) Microtopographic Relief (D4) FAC- Neutral Test (D5) Surface Water (A1) True Aquatic Plants (B14) High Water Table (A2) Hydrogen Sulfide Odor (C1) Saturation (A3) Oxidized Rhizospheres on Living Roots (C3) Water Marks (B1) Presence of Reduced Iron (C4) Sediment Deposits (B2) Recent Iron Reduction in Tilled Soils (C6) Drift Deposits (B3) Thin Muds Surface (C7) Algal Mat or Crust (134) Other (Explain in Remarks) Iron Deposits (135) Inundation Visible on Aerial Imagery (137) Water - Stained Leaves (139) Aquatic Fauna (1313) ✓ ✓ Field Observations: Surface Water Present? Yes No ✓ Depth (inches). Water Table Present? Yes No ✓ Depth (inches): > 36" Saturation Present? Yes No IV I Depth (inches): > 36" includes capillary frin e Wetland Hydrology Present? Yes II No Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: Remarks: Heavy leaf litter around drift deposit indicates deposits may be a result of a single floodlow event in early to late fall. Leaf litter has fallen on top of drift piles. No saturation was observed and the water table was within the upper 36" of the soil profile. Despite geomorphic position, heavy recent rainfall has not left evidence of inundation, flood, or surface flow. Many roots were present in the upper 12" of the soil profile, but no oxidation was observed. US Army Corps of Engineers Eastern Mountains and Piedmont — Version 2 0 VEGETATION (Four Strata) — Use scientific names of plants. Sampling Point: DP1 30' Tree Stratum (Plot ) ._ - - - - -- .f Cover ---- ...._......- SDBCIeS? - - - - -- Status ------- - - - - -- --------------- -- Number of Dominant Species 1 Platanus occidentalis _30% Y FACW That Are OBL, FACW, or FAC: _6 (A) 21 Quercus phellos Y FACW_ �Ju lans ni a 3. g � _20% 10% N FACU Total Number of Dominant 9 Species Across All Strata: (B) 4. Percent of Dominant Species 67% 5. That Are OBL, FACW, or FAC: (A/B) 6. Prevalence Index worksheet 7 8. Total % Cover of: Multiply by: 60% = Total Cover OBL species x 1 = ,Sapling /Shrub Stratum (Plot size: 30' 1 FACW species x2= 1 .• Acer rubrum —10% Y FAC FAC species x3= 2Juniperus virginiana 10%_ FACU FACU species x4= 3. Juglans nigra _ 5% _Y Y FACU UPL species x 5 = 4 Column Totals- (A) (B) 5. Prevalence Index = B/A = 6. Hydrophytic Vegetation Indicators: 7. _ 1 - Rapid Test for Hydrophytic Vegetation s. X 2 - Dominance Test is >50 °k 9 3 - Prevalence Index is 11113.0' 10 25p/o _ 4 - Morphological Adaptations' (Provide supporting Herb Stratum (Plot size: 30' ) _ =Total Cover data in Remarks or on a separate sheet) 1. Poaceae sp. __10% Y FAC _ Problematic Hydrophytic Vegetation' (Explain) 2.. Ambrosia sp. —10% _Y FAC 3 Allium canadense 5% N FACU 'Indicators of hydric soil and wetland hydrology must be present, unless disturbed or problematic. 4. Definitions of Four Vegetation Strata: 5. 6. Tree— Woody plants, excluding vines, 3 in. (7.6 cm) or 7 more in diameter at breast height (DBH), regardless of height. 8. g Sapling/Shrub —Woody plants, excluding vines, less than 3 in. DBH and greater than or equal to 3.28 ft (1 10 m) tall. 11. Herb — All herbaceous (non - woody) plants, regardless 12 of size, and woody plants less than 3 28 ft tall. 30' —2590 =Total Cover Woody Vine Stratum (Plot size: ) Woody vine — All woody vines greater than 3.28 ft in 1 Ampelopsis brevipedunculata _ 5% Y _FAC hei ht. 2 Hedera helix 2% Y NI 3. 4. 5 Hydrophytic Vegetation n M 6. Present? Yes No 7% = Total Cover Remarks: (Include photo numbers here or on a separate sheet.) A large sycamore is providing the dominant canopy coverage. Mid - canopy willow oaks are prevalant, and the understory is light. The herbaceous layer is dominated by common grasses and weeds, likely a result of the pro)dmity to maintained /disturbed right of way. US Army Corps of Engineers Eastern Mountains and Piedmont — Version 2.0 SOIL Sampling Point. DP1 Profile Description: (Describe to the depth needed to document the Indicator or confirm the absence of Indicators.) Depth (inches) Matrix Color (moist) % Redox Color (moist) Features % Tvoe' Locz Texture Remarks 0-4" 4/3 100% Histic Epipedon (A2) Clay loam _ 4 -20" _10YR 10YR 5/3 20% 7.5YR 5/6 80% C M Clay loam _ 20 -26 "_ 5/3 Thin Dark Surface (S9) (MLRA 147, 148) 7.5YR 5/6 C M Clay loam 26-36';-- _10YR 5/1 _70% 80% 7.5YR 5/6 _30% 10% - - Clay *split matrix Depleted Matrix (F3) 5Y 6/3 10% - - 2 cm Muck (A10) (LRR N) Hydric Soil Indicators: Indicators for Problematic Hydric Soils': Histosol (A1) Dark Surface (S7) 2 cm Muck (All 0) (MLRA 147) Histic Epipedon (A2) Polyvalue Below Surface (S8) (MLRA 147, 148) Coast Prairie Redox (A16) Black Histic (A3) Thin Dark Surface (S9) (MLRA 147, 148) (MLRA 147, 148) Hydrogen Sulfide (A4) Loamy Gleyed Matrix (F2) Piedmont Floodplain Soils (F19) Stratified Layers (A5) Depleted Matrix (F3) (MLRA 136, 147) 2 cm Muck (A10) (LRR N) Redox Dark Surface (F6) ❑ Very Shallow Dark Surface (TF12) Depleted Below Dark Surface (All 1) Depleted Dark Surface (F7) ❑ Other (Explain in Remarks) Thick Dark Surface (Al2) Redox Depressions (F8) Sandy Mucky Mineral (S1) (LRR N, Iron - Manganese Masses (F12) (LRR N, MLRA 147, 148) ❑ MLRA 136) 3Indicators Sandy Gleyed Matrix (S4) Umbric Surface (F13) (MLRA 136, 122) of hydrophytic vegetation and 8 Sandy Redox (S5) Piedmont Floodplain Soils (F19) (MLRA 148) wetland hydrology must be present, Stripped Matrix (S6) Red Parent Material (F21) (MLRA 127, 147) unless disturbed or problematic. Restrictive Layer (if observed): Type. Depth (inches): Remarks: Hydric Soil Present? Yes El No IZI The soil profile is indicative of an active flooplain, but the slope and geomorphic position of the floodplain in the vicinity of DP1 indicates that the area is inundated after flood events. Soil composition was varied below 26 ", likely a result of alluvial deposition. No sand was present in the profile however. No saturation was observed, and the water table was not present in the upper 36 ". Clay content was boo high for removal and analysis below 36 ". US Army Corps of Engineers Eastern Mountains and Piedmont — Version 2 0 Mitchell WTP Filter Backwash Outfall Profile INofth Buffalo I Creek e Iw 11rrw luem 1u+au iwia n+w n+m n+aa 11+1a 1e+w 1z+m 1z+0u 1x+10 1a +w 10140 1a+au 1a�1a 14+w 14+40 14+au 14+10 ....... ....... .... .... .... .... .... .... .... .... .... .... .... .... .... .... . .. .... .... . .. .... .... . .. .... .... ... . .... .... .. .. .... .... . .. . .... .... . . .. .... .... . .. . .... . .. .... .... . .. . .... .... . . .. .... .... . . . . .... .... .. . . . .. . . s ....... ....... ....... _. — — .. .. .. . . . . . . . . 1 . . . . . . .� \; ....... -m .. .. ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... .... —_— .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... .... — . . . . . . . . . . . . —. .. .. .. . . . . ' `i —_ —T . . . . /Y ... .... .. .. .. . . . . . . . . . i . . . . . . . . . . . . . . . . . . . . . . . . . . . ... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .� »o . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . `. 7w _ 7as ....... ....... ....... ....... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... . ... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... . . .. .... .... .... ... . ... .... .... .... .. . . . . .... .... .... .... .... .. .... .... .... .... .... ....... ....... ....... ....... 7m .... 70 ....... ....... ....... ....... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... . .... .... .... ... .... .... .... .... .... .... .... ....... ....... ....... ....... 7l0_ .... .... .... ....... ....... ....... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... ... .... ....... ....... ....... ....... e Iw 11rrw luem 1u+au iwia n+w n+m n+aa 11+1a 1e+w 1z+m 1z+0u 1x+10 1a +w 10140 1a+au 1a�1a 14+w 14+40 14+au 14+10