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HomeMy WebLinkAbout20052070 Ver 1_More Info Received_20060214Soil & Environmental Consultants, PA 11010 Raven Ridge Road • Raleigh, North Carolina 27614 • Phone: (919) 846-5900 • Fax: (919) 846-9467 www.SandEC.com Department of Environment and Natural Resources Division of Water Quality Attn: Cyndi Karoly 2321 Crabtree Boulevard Suite 250 Raleigh, NC 27604 February 14, 2006 S&EC Project # 8713.W1 vv? RMp FEB 1 4- 2006 Re: Reply to the Division of Water Quality's Request for More Information 1.. `?Ersl t si aai:?L-iTY Weavers Pond Subdivision, DWQ # 05-2070 anf 68A.64i;a :skg7ERBWO Zebulon, Wake County, NC Dear Ms. Karoly: The purpose of this letter is to respond to your November 22, 2005 letter requesting further information. The original questions/requests are copied below as they appear on the 11/22/05 letter and are then followed by our response to each. Additional Information Requested: 1. Please indicate all stormwater outfalls on the site plan. An overall stormwater site plan map is attached for your review. This site plan map includes all stormwater outfalls proposed within the previously applied for Weavers Pond Subdivision. 2. Please indicate the diffuse flow provision measures on the site plan. A stormwater plan with an overall stormwater plan map that provides diffuse flow is attached for you review. This stormwater plan includes dry detention basins followed by level spreaders, timber weir wall level spreaders and pre-formed scour holes all designed to meet the diffuse flow requirements. In addition, level spreader worksheets, dry detention worksheets and 2 Operations & Maintenance Agreements for level spreaders and dry detention basins are included. 3. The road crossing labeled as "Road D-Crossing #3 " on the plans does not appear to be necessary. Please eliminate the road crossings orprovide additional information as to why it is necessary for this project. As stated within the Pre-Construction Notification Application, this road crossing is needed for internal connectivity, to insure safety due to the number of lots served and to accommodate future development to the northern portion of the property. As such, the applicant is now proposing to cross this feature with a bottomless culvert and completely spanning both banks to avoid all stream impacts. In the original application, USACE Stream Quality Assessment Worksheets and DWQ Stream Identification Forms were completed and submitted, along with photo's of this. unimportant, intermittent stream to emphasize Charlotte Office: Greensboro Office: 236 LePhillip Court, Suite C 3817-E Lawniale Drive Concord, NC 28025 Greensboro, NC 27455 Phone: (704) 720-9405 Phone: (336) 540-8234 Fax: (704) 720-9406 Fax: (336)540-8235, the low quality of this agricultural feature and its existing riparian buffer. Attached are new impact maps for Road D-Crossing #3 and photo's of the existing riparian buffer. We hope that this answers all of the DWQ's questions in order to finish the final review process for a 401 Water Quality Certification. If you have any further questions or any additional explanation is needed, please don't hesitate to call. Sincerely, Aaron Cooper Environmental Scientist Attachments: 1) Overall Stormwater Site Plan, sheets 1-6 (5 copies) 2) Overall Stormwater Site Plan, aerial photo (5 copies) 3) Stormwater and Erosion Control Calculations binder (includes level spreader & dry detention worksheets) (5 copies) 4) Level Spreader Operations & Maintenance Agreement, signed and sealed (5 copies) 5) Dry Detention Operations & Maintenance Agreement, signed and sealed (5 copies) 6) Revised Road D-Crossing #3 Impact Map & Vertical Cross-section 7) Photo's of stream and impact area for proposed Road D-Crossing #3 (5 copies) 8) Revised pages 3, 4, 5 & 8 of the PCN (5 copies) CC: Michael Whitehead-MacGregor Development Co., 201 Shannon Oaks Circle, Cary, NC 27511 2 10. Describe the overall project in detail, including the type of equipment to be used: The proposed project consists of the construction of a residential subdivision with typical utilities (i.e sewer, water). Typical construction and grading equipment will be utilized for this project. 11. Explain the purpose of the proposed work: The purpose of the proposed project is to develop a residential subdivision. 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. S&EC conducted a preliminary wetland delineation followed by a detailed wetland delineation and Neuse Buffer evaluation in April of 2004. Ms. Jennifer Burdette, formerly of the USAGE, verified our delineation on November 30, 2004. A sign-off map will be submitted at a later date. Mr. Michael Horan of the NC-DWQ conducted a site visit to determine features subject to the Neuse Buffer Rules (NBRRO#04-0211; letter is attached). No previous permits have been issued for the project. 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 future permit requests are anticipated for this project at this time. 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 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: Permanent impacts associated with road construction and widening include 0.15 acres of Zone 1 Neuse Buffer, 0.14 acres of Zone 2 Neuse Buffer. Temporary impacts due to sanitary sewer line installation and Page 3 of 10 additional access needed for the construction of the roads include 95 linear feet of stream channel, 0.33 acres of Zone 1 Neuse Buffer, 0.19 acres of Zone 2 Neuse Buffer, 030 acres of open water impacts and 0.396 acres of wetlands. 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, separately list impacts due to both structure and flooding. Wetland Impact Type of Wetland Located within Distance to Area of Site Number Type of Impact (e.g., forested, marsh, 100-year Nearest Impact (indicate on map) herbaceous, bog, etc.) Floodplain Stream (acres) es/no linear feet Utility Impact Permanent Headwater Forested No 0 0.132 Map #1 Temporary 0.264 Total Wetland Impact (acres) 0.396 3. List the total acreage (estimated) of all existing wetlands on the property: >0.5 acres 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 Perennial or Average Impact Area of Number Stream Name Type of Impact Stream Width Length Impact indicate on ma Intermittent? Before Impact linear feet acres Utility Impact UT to Beverdam Temporary Perennial +/- 3' 31 0.002 Map #1 Crk Utility Impact UT to Beverdam Temporary Perennial +/- 3' 34 0.002 Map #1 Crk Utility Impact UT to Beverdam Temporary Perennial +/- 3' 30 0.002 Map #2 Crk Total Stream Impact (by length and acreage) 95 0.006 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 Name of Waterbody Type of Waterbody Area of Site Number (if applicable) Type of Impact (lake, pond, estuary, sound, bay, Impact indicate on ma ocean, etc. acres Page 4 of 10 the low quality of this agricultural feature and its existing riparian buffer. Attached are new impact maps for Road D-Crossing #3 and photo's of the existing riparian buffer. We hope that this answers all of the DWQ's questions in order to finish the final review process for a 401 Water Quality Certification. If you have any further questions or any additional explanation is needed, please don't hesitate to call. Sincerely, Aaron Cooper Environmental Scientist Attachments: 1) Overall Stormwater Site Plan, sheets 1-6 (5 copies) 2) Overall Stormwater Site Plan, aerial photo (5 copies) 3) Stormwater and Erosion Control Calculations binder (includes level spreader & dry detention worksheets) (5 copies) 4) Level Spreader Operations & Maintenance Agreement, signed and sealed (5 copies) 5) Dry Detention Operations & Maintenance Agreement, signed and sealed (5 copies) 6) Revised Road D-Crossing #3 Impact Map & Vertical Cross-section 7) Photo's of stream and impact area for proposed Road D-Crossing #3 (5 copies) 8) Revised pages 3, 4, 5 & 8 of the PCN (5 copies) CC: Michael Whitehead-MacGregor Development Co., 201 Shannon Oaks Circle, Cary, NC 27511 Crossing #1 N/A Road-temporary Pond 0.010 Crossing #1 N/A Utility-temporary Pond 0.020 Total Open Water Impact (acres) 0.030 6. List the cumulative impact to all Waters of the U.S. resulting from the proiect: Stream Imp act (acres): 0.006 Wetland Impact (acres): 0.396 Open Water Impact (acres): 0.030 Total Impact to Waters of the U.S. (acres) 0.432 Total Stream Impact (linear feet): 95 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. N/A 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.): N/A Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond, local stormwater requirement, etc.): N/A Current land use in the vicinity of the pond: N/A Size of watershed draining to pond: N/A Expected pond surface area: N/A 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 client reauested a nreliminarv and detailed wetland delineation and Neuse Buffer evaluation for the project prior to site plan development. The widening of Pippin Road (Crossings 1 and 2) is necessary to accommodate the increased traffic in the area, however the applicant has utilized the existing Right-Of-Way to widen the road so no new stream impacts are proposed. Crossing 3 proposes to impact a ditched, intermittent stream within an agricultural field (see attached USACE & DWO stream forms and photos). This crossing is needed for internal connectivity, to insure safety due to the number of lots served and to accommodate future development to the northern portion of the property. In addition, this is the only Page 5 of 10 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* Crossing 1 Multiplier Required (square feet Mitigation 1 273 perm 3 (2 for Catawba) N/A 1,984 temp** 2 1,334 perm 1 5 N/A 641 temp . Total 1,607 perm 1.5 N/A 2,625 temp * Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an additional 20 feet from the edge of Zone 1. ** Temporary Zone 1 impacts will not be impervious, these areas will be re-vegetated. Zone* Crossing 2 Multiplier Required (square feet Mitigation 1 1,52 to p** 3 (2 for Catawba) N/A 2 835 perm 1 5 N/A 518 temp . Total 837 perm 1.5 N/A 2,036 temp * Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an additional 20 feet from the edge of Zone 1. ** Temporary Zone 1 impacts will not be impervious, these areas will be re-vegetated. Zone* Crossing 3 Multiplier Required (square feet Mitigation 1 6,310 perm 3 (2 for Catawba) N/A 715 temp** 2 3,973 perm 1.5 N/A 452 temp Total 10,283 perm 1.5 N/A 1,167 temp * Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an additional 20 feet from the edge of Zone 1. ** Temporary Zone 1 impacts will not be impervious, these areas will be re-vegetated. Zone* 6 Utility Lines (square feet Multiplier Required Mitigation 1 10,409 3 (2 for Catawba) N/A 2 6,682 1.5 N/A Total 17,091 1.5 N/A * Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an additional 20 feet from the edge of Zone 1. Page 8 of 10 ROAD D- CROSSING #3, APPROXIMATE IMPACT AREA (FACING NORTHEAST) d IF ,• 9 • c ?' L.. ,, ,'• mil ? v' ?~ ?. ?`,??}?-. -r =5 .. 1 nnne-! W H ? C) F-4 a0 Mz ?U z? a? U? A H U O? OPERATIONS AND MAINTENANCE AGREEME WEAVERS POND SUBDIVISION n 1 DRY DETENTION BASINS #1, #2, & #3 1. INTRODUCTION This manual establishes procedures for maintenance of the dry detention pond for the Weavers Pond Subdivision. These procedures are in compliance with the guidelines of DWQ Stormwater Runoff Management Policy that requires the dry detention pond be inspected and maintained as part of the development. A. Dry Detention Pond The dry detention pond will function as a stormwater control facility by providing temporary storage of post-development runoff in excess of pre-development runoff. The pond is designed to provide a 2-5 day discharge of the volume from a 1" rain in accordance with Division of Water Quality Policy. II. MAINTENANCE A. Vegetation The dry detention pond has a ground cover of fescue, which, if properly maintained, will prevent erosion of the embankment and provide an easy surface for inspection. Grass should be fertilized every October and April. Re-seeding - Periodically re-seeding may be required to establish grass on areas where seed did not take or has been destroyed. Before seeding, fertilizer (12-12-12) should be applied at a minimum rate of 12 to 15 pounds per 1,000 SF. The seed should be evenly sewn at a rate of three pounds per 1,000 SF. The seed should be covered with soil to the depth of approximately 114". Immediately following the planting, the area should be mulched with straw. Mowing - Grass mowing and removal of weed vegetation will be necessary for the proper maintenance of the embankment. All slopes should be mowed when the grass exceeds 8" in height. Acceptable methods include the use of weed whips or power brush cutters and mowers. Grass and vegetation clipping shall be bagged and removed from the site, they will not be allowed to remain on the ground which would result in washing into the storm water system. B. Erosion Erosion occurs when the water concentrates causing failure of the vegetation or when vegetation dies and sets up the environment for rill erosion and eventually gullies from the stormwater runoff. Proper care of vegetative areas that develop erosion is required to prevent more serious damage to the slopes. Rills and gullies should be filled with suitable soil compacted and then seeded. Where eroded areas are observed, the cause of the erosion should be addressed to prevent a continued maintenance problem. C. Standing Water • Areas where water "stands" shall be re-graded to provide a minimum 0.5% slope. D. Storm Water Sewers/Culverts A. Structural Elements - At a minimum, the structural elements of the underground stormwater culverts should be thoroughly inspected once a year. Several of the structural elements may need more frequent inspections. The inspections should include the following: The inside of the structure should be inspected for cracks, spalling, joint failure or leaks a minimum of once per year. If signs of cracks, leaks, misalignment, sagging or settlement of the structure or storm sewers are observed, a Civil Engineer or Geotechnical Engineer should be retained to determine the probable cause and recommended remediation. The orifice should be inspected and storm sewers should be inspected for debris or sediment accumulation after every major storm event. Any sediment or debris removal should be removed to prevent blockage. Sediment shall not be flushed into storm system and shall be collected and removed from the site. The outlet pipe should be visually inspected for sagging and alignment a minimum of once per year. III. OPERATION A. Record Keeping Operation of the dry detention pond should include recording of the following: • Annual Inspection Reports - A collection of written reports should be kept on file with the Homeowner's Association. A visual inspection should be conducted annually by a professional engineer or his/her representative. All visual observations should be recorded. • Maintenance - Recommendations for maintenance and/or repairs should be recorded within the Annual Inspection Report. • Other Operational Procedures - The Homeowner's Association should maintain a complete and up-to-date set of plans (as-built drawings) and all changes made to the dry detention pond over time should be recorded on the as-builts by a Professional Engineer. B. Sedimentation and Dredging The accumulation of sediment within the dry detention pond may require periodic removal to maintain sufficient capacity for storage of stormwater. The frequency of this sediment removal can be reduced by ensuring that the site areas around the upland areas are stabilized with a vegetative ground cover such that it restrains erosion. The removed material should be hauled offsite to a suitable site or mounded somewhere on site and stabilized with a ground cover sufficient to restrain erosion. Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has -- been named the president. a Notary Public for the State of County of 0 , do hereby certify that ?\C?a P-- ? personally appeared before me this day of V (tbVOo.-t'cA and acknowledge the due execution of the forgoing wet [wetland] detention basin maintenance requirements. Witness my hand and official seal, ````\\\````G`pI1R 11/ C ?Qrf "9V Q•r {?pI A I? t { jOURL V i4?4ifF CoUNO SEAL ll My commission expires I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. LEVEL SPREADER OPERATION AND MAINTENANCE AGREEMENT WEAVERS POND SUBDIVISION The level spreader is defined as an elongated, level threshold, designed to diffuse stormwater runoff. Maintenance activities shall be performed as follows: 1. After construction and until vegetation has been established, level spreader(s) shall be inspected after every rainfall. Thereafter, level spreader(s) shall be inspected at least every month and more frequently during the fall season and after heavy rainfall events: a. Accumulated sediment, leaves, and trash shall be removed, and repairs made if required. b. Inspect level spreader(s) for evidence of scour, undercutting, settlement of the structure, and concentrated flows downhill from the level spreader(s). c. A level elevation shall be maintained across the entire flow-spreading structure at all times. Repair or replace the level spreader if it is damaged. d. Mow vegetative cover to a height of six (6) inches and prune plants if they cover over half of the level spreader surface. e. Repair eroded areas and replace/replant dead or damaged vegetation. 1. Vegetation Grass should be fertilized every October and April. Re-seeding - Periodically re-seeding may be required to establish grass on areas where seed did not take or has been destroyed. Before seeding, fertilizer (12-12-12) should be applied at a minimum rate of 12 to 15 pounds per 1,000 SF. The seed should be evenly sewn at a rate of three pounds per 1,000 SF. The seed should be covered with soil to the depth of approximately 1/4". Immediately following the planting, the area should be mulched with straw. • Mowing - Grass mowing and removal of weed vegetation will be necessary for the proper maintenance of the embankment. All slopes should be mowed when the grass exceeds 8" in height. Acceptable methods include the use of weed whips or power brush cutters and mowers. 2. The contractor should avoid the placement of any material on and prevent construction traffic across the structure. If the measure is damaged by construction traffic, it shall be repaired immediately. 3. Inspect and repair the collection system (e.g., catch basins, pipes, swales, riprap) four (4) times a year to maintain proper functioning. I acknowledge and agree by my signature below that 1 am responsible for the performance of the seven maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. nn Print name: PI ` ; AA / IPd I1 n j Title- 1?.I dLzm,I i . (ALLLelrt t'?t ,' a,w, ? ttve fm,,: Note: a Notary Public for the State of V,-e_ , do hereby certify that personally appeared before me this CIOC(e and acknowledge the due execution of the forgoing wet [wetland] detention basin maintenance requirements. Witness my hand and official seal, d ? rJ Pug0G coo The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. SEAL //\\ My commission expires ?? Address: a ( 7G?twh ? ? C.t.w({?, ?r Zo f -.Qu uvc?Y??w `ll t-,r- ZEBULON PLANNING DEPARTMENT MEMORADUM To: Bruce Herbert- Macgregor Development Company From: Lyddia E. Pritchard, Planning Director Subject: Weavers Pond Roadway Improvements Date: February 27, 2006 As part of the Special Use Permit approval process for Weavers Pond you provided a Site Plan and Traffic Impact Analysis. The site plan was approved by the Board of Commissioners. The roadway design improvements as provided by your firm and the traffic engineer are integral to maintaining safe and timely access to northern Zebulon residents. The minor thorough-fares shown on the attached exhibit provide for the access and interconnectivity required in our Conservation Subdivision zoning. These same roadway improvements were central to the Zebulon Board of Commissioners approval as evidenced by the inclusion of these improvements as a condition of your Special Use Permit. As you recall, the distance between these minor thorough fares as well as the direct approach of this roadway toward the north was a significant discussion point made by the Board. Even at the cost of an encroachment to the buffers of the farm drainage way, the town encourages that every effort be made to obtain approval for this roadway crossing in the location shown on the attached exhibit. Dual access points are a requirement of the 2000 edition of the International Fire Code. The access points, labeled on the attached exhibit (access 1 & access 2), are necessary to provide for emergency ingress and egress to the 115 homes in the western portion of the subdivision. Should you need any additional information, or explanation of the towns position in regard to this matter, please do not hesitate to call. Lyddia E. Pritchard, CZO 919-269-7455 ext 244. t, s I i oati//? , ac f I I ? I 1 L_J---- I c G6 Group, LAND PLANNING CIVIL ENGINEERING 600' 0 *600, 1200' CONSTRUCTION MANAGEMENT ' 936'0'90 SCALE: "=600' (1onz.) LEGEND 4w - - - _ m MINOR TtOROUGM FARE 0 2 1 ? Revs o s: WEAVERS POND SUBDIVISION OVERALL THOROUGH FARE MAP ZEBULON, NC ? ¦?rr;rrl:?. man, r "c- -I ? a ZEBULON PLANNING DEPARTMENT MEMORADUM To: Bruce Herbert- Macgregor Development Company From: Lyddia E. Pritchard, Planning Director Subject: Weavers Pond Roadway Improvements Date: February 27, 2006 L.ir As part of the Special Use Permit approval process for Weavers Pond you provided a Site Plan and Traffic Impact Analysis. The site plan was approved by the Board of Commissioners. The roadway design improvements as provided by your firm and the traffic engineer are integral to maintaining safe and timely access to northern Zebulon residents. The minor thorough-fares shown on the attached exhibit provide for the access and interconnectivity required in our Conservation Subdivision zoning. These same roadway improvements were central to the Zebulon Board of Commissioners approval as evidenced by the inclusion of these improvements as a condition of your Special Use Permit. As you recall, the distance between these minor thorough fares as well as the direct approach of this roadway toward the north was a significant discussion point made by the Board. Even at the cost of an encroachment to the buffers of the farm drainage way, the town encourages that every effort be made to obtain approval for this roadway crossing in the location shown on the attached exhibit. Dual access points are a requirement of the 2000 edition of the International Fire Code. The access points, labeled on the attached exhibit (access 1 & access 2), are necessary to provide for emergency ingress and egress to the 115 homes in the western portion of the subdivision. Should you need any additional information, or explanation of the towns position in regard to this matter, please do not hesitate to call. Lyddia E. Pritchard, CZO 919-269-7455 ext 244. z / I j, a o°o e I I I f, xY i / I I? rJ CE Group, LAND PLANNING CIVIL ENGINEERING 600' 0 *600, 1200' CONSTRUCTION MANAGEMENT «..9 9 >r x 9 3,. 5 CALE: 1 "=600' (Hor,z.) ? I ? I Rews?ons: r m = - = m MINOR THOROUGH FARE 0 wall WEAVERS POND SUBDIVISION OVERALL THOROUGH FARE MAP ZEBULON, NC ./I j LEGEND FIRE DEPARTMENT ACCESS Based on the 2000 edition of the International Fire Code The Fire Department is required to respond to a multitude of emergencies in various types of buildings and occupancies. These include single-family dwellings, apartment buildings, shopping malls, business complexes, industrial complexes, hospitals, and nursing homes. To provide effective fire fighting operations, we must be able to reach all structures by way of approved access roadways, streets, or driveways. To assist developers and designers in meeting our requirements, we have defined some terms and listed minimum design standards considered necessary for effective fire fighting operations. ? Fire Department Access An approved route that is always available for use by fire trucks and is designed to meet fire equipment load requirements. Except for Loop Lanes, Shared Driveways, and Private Driveways, all access routes must be at least 20' wide. When a dead-end access route exceeds 150' in length, an approved turn around area must be provided. ? Public Street Access A Fire Department Access route on a public right of way comply with the City or County road design standards International Fire Code. ? Private Street Access Public street access routes must and also must comply with the A Fire Department Access route on private land. Private street access routes must comply with the International Fire Code. ? Grades Street grades shall comply with City or County design standards for both Public and Private Street Access routes. Maximum grade shall not exceed 8% (12% allowed in hilly terrain). ? Grades on Turn Around Areas Maximum grades on turn around areas shall not exceed 4%. Residential Cul-De-Sac Residential Looped Lane ? Height All Fire Department access routes shall have at least 13 feet, 6 inches of vertical clearance for the entire required width. ? Looped Lane A Fire Department Access route in a public right of way, consisting of a looped road that must be at least 16' wide. Looped lanes may be approved for residential subdivisions and must be designed to approved standards (see design pages). ? Private Driveway A private driveway designed for the use of occupants of no more than two single-family dwelling units or one two-family dwelling unit. If the dwelling units are located more than 100' from an approved Fire Department Access route, the private driveway must meet our minimum design standards: At least 12' wide; grades not to exceed 12%; adequate turn arounds provided if over 150' long; width to be increased if sharp curves are included; constructed with an all-weather surface and able to support the weight of a fire truck. ? Shared Driveway A Fire Department Access route on private property, serving three or more single-family units. A shared driveway must be at least 16' wide and be designed to approved standards (see design pages). ? Residential Cul-De-Sac, Commercial/Industrial Cul-De-Sac An approved turnaround area for public right of ways or private property, designed to Fire Department standards (see design pages). ? Tee Turnaround, Alternative Turnarounds An approved turnaround area for private property designed to Fire Department standards (see design pages). ACCESS GUIDELINES The following guidelines represent this department's efforts to maintain consistency concerning Fire Department emergency access. It is our responsibility to ensure adequate access for Fire Department emergency responders. We therefore reserve the right to require modifications to established requirements if, in our opinion, the access cannot be provided or may be compromised. Type of Surface All access roadways shall be finished by application of an all-weather driving surface of hot mix asphaltic concrete or concrete pavement over a flexible base capable of supporting a design wheel load of 18,000 pounds (GVW 80,000 pounds minimum; H-20 loading). The roadway design must be prepared and certified by an engineer registered by the State of Colorado. Any required Fire Department access within 100 feet of any building must meet the same wheel-loading criteria. All required access roadways must be properly maintained and kept clear for emergency use at all times. Any alternatives to these specifications must be reviewed and approved by the Grand Junction Fire Department prior to construction. Two Points of Access Providing two points of fire apparatus access has the following benefits: ? If one access route is blocked, emergency responders have a second route to the property. ? If an emergency requires evacuation of an area, the public will have an alternative exit route should one route be blocked by the emergency incident. When two points of access are required, they shall be placed a distance apart equal to not less than one half of the length of the maximum overall diagonal dimension of the property or area to be served, measured in a straight line between accesses. The Grand Junction Fire Department does not allow the second access point limited to use by emergency responders only. The second access must always be available for public use in case the other access is blocked. Commercial and Industrial Developments: ? Buildings or facilities exceeding 30 feet or 3 stories in height shall have at least 2 means of fire apparatus access. ? Buildings or facilities having a gross building area of more than 62,000 square feet shall have at least 2 means of fire apparatus access. If the buildings or facilities are provided with an approved automatic fire sprinkler system, the gross building area can be increased to 124,000 square feet with one access road. Multi-family Residential Developments: ? Multi-family residential projects having more than 100 dwelling units shall be provided with at least 2 means of fire apparatus access. ? Multi-family residential projects of up to 200 dwelling units, which are provided with an approved fire sprinkler system, may have one means of fire apparatus access. One or Two Family Residential Developments: ? Developments where the number of dwelling units exceeds 30, shall be provided with separate and approved fire apparatus access roads. ? Developments where the number of dwelling units is 60 or less may be served by a single fire apparatus access road, provided all dwelling units are provided with approved residential fire sprinkler systems. Aerial Apparatus Roadway Width ? Fire apparatus access roadways shall have a minimum unobstructed width of 26 feet in the immediate vicinity of any building of portion of building more than 30 feet in height. At least one of the required access routes meeting this condition shall be located within a minimum of 15 feet and a maximum of 30 feet from the building, and shall be positioned parallel to one entire side of the building. Maintenance of Access Roads Maintenance of the required access shall be considered during the planning stages and installation of Fire Department access roadways, fire hydrants, or connections. This includes the potential growth of trees and/or other vegetation over the years. Divided Entryway A divided entryway can present a challenge to emergency vehicles. The required width of the driveable surface in a divided entryway is based on the width of the entryway and that of the street fronting it. ? If the street fronting the divided entryway is 28 feet wide, each lane of the entryway must be at least 15 feet wide. ? If the street fronting the divided entryway is 34 feet wide, the entryway lanes may be less than 15 feet wide, but cannot be less than 12 feet wide. ? For fronting streets wider than 34 feet, entryway lanes must be at least 12 feet wide. No Parking Signage For access routes less than 28 feet wide and for fire apparatus turnaround areas, vehicle parking is not allowed. No Parking signs, are required. An approved design for the signage is shown in the Transportation Engineering Design Standards, available from the City of Grand Junction Department of Public Works. ? For access routes 16 to 22 feet wide, No Parking signs are required along both sides of the route. ? For access routes 22 to 28 feet wide, No Parking signs are required along one side of the route. ? For Hammerhead Tees and Alternative Turnarounds, No Parking signs are required along both sides of the area. ? For Cul-de-sacs, No Parking signs should be placed along the outside of the turnaround area. ............................................................................ DESIGN STANDARDS The following pages give examples of Grand Junction Fire Department approved roadway, turnaround, and turning radius specifications. The last of these pages may be photocopied onto a transparency as a template for Fire Department turn radius requirements. This is the template used by the Fire Prevention Bureau when reviewing plans to determine proper access and is based on the actual size of our fire fighting apparatus. Hammerhead Tee Turnaround i o 20 Fire Truck I 0 00 *? I • I• 4 f R% Turning Radius Required for Fire Apparatus in a Tee Turnaround 1 ? S ti 1 1 -r? 1 1 ?• I --I C 0 oX 0 I I I Minimum 1 must be pr all turn arc designs. FIro 7rUCk Alternative Turnaround M }? M 0. h ? 1 n Z 4 h =1 L ?7d I ? 1 F s- Q? Any proposed alternative or variation from a standard Hammerhead Tee must meet our minimum turn radius requirement and provide at least a 60' length for the turning areas. Alternative Tee Turnaround Other Fire Department Turnarounds and Clearances Turnouts for Fire Hydrants: For emergency access routes less than 22 feet wide, where fire hydrants are required along the route, a turnout area for fire trucks is required. The width of the access road must be at least 20' in the area of the turnout. This turnout area is required so that when a fire truck utilizes the fire hydrant in an emergency, the access route will still be available for use by other emergency vehicles. Intermediate Turnaround Areas: In cases where a single point of access exceeds 600 feet in length, intermediate turnaround areas are required. The width of the access road must be at least 28 feet in the area of the turnaround. These areas allow emergency vehicles to turn around without having to drive to the end of a long dead-end road. The intermediate turnarounds must be provided at a maximum interval of every 500 feet. Turnouts for Intermediate Fire Hydrants Turnarounds Looped Lane Standards 1. Not more than seven single family residences obtain access from the fire loop lane; 2. The sixteen foot wide fire loop lane shall consist of an all-weather clear surface; 3. No curve on any portion of the flow line of the fire loop lane shall have an inside radius of less than thirty-three feet (33') and an outside radius of less than forty-eight feet (48'). "Flow line" means the area between the curbs or equivalent if curbs are not present. 4. No portion of the fire loop lane shall extend more than two hundred and fifty feet (250) from the abutting street right-of-way. 5. A minimum of four parking spaces shall be constructed at the end of the fire loop lane, as indicated on the diagram. 6. The fire loop lane and parking stalls, as indicated on the diagram, are dedicated to and maintained by the City; 7. Two-way traffic is allowed; 8. No parking signs and markings, as required by the City, are installed and maintained so that no parking is allowed between the curbs on any traveled portion of the fire loop lane; 9. Comer lots that front the fire loop lane and the abutting street shall be required to only obtain access from the fire loop lane. 10. No garage or carport built on a lot obtaining access from the fire loop lane shall be constructed any portion of which is closer than forty feet (40') from any portion of the fire loop lane; 11. Each residence obtaining access from the fire loop lane shall provide and maintain four parking spaces between the garage or carport and the fire loop lane; and 12. The fire loop lane shall only connect to a street where on-street parking exists now and is expected to remain, according to the City Engineer, based on such factors as the City capital program and any adopted street plans. Other Possible Layouts Max. 250' Sidewalks On-street Parking 1'1? J1 Shared Driveway Standards 1. A shared driveway shall be owned and maintained by the owners of the parcels or lots which abut the shared driveway; 2. Not more than four single family lots shall abut or touch any portion of the shared driveway and no more than four single family units may access a shared driveway; 3. A shared driveway shall be least sixteen feet (16') wide and not longer than one hundred and fifty feet (150'); 4. No parking is allowed on the shared driveway; 5. Each lot abutting a shared driveway must provide 4 on-site parking spaces. 6. Each lot abutting a shared driveway must access off the shared driveway unless varied at time of subdivision approval; and 7. A shared driveway may be used only where it intersects a street where on-street parking exists and is expected to remain, according to the City Engineer, based on such factors as the City capital program and any adopted street plans. Example Layout OPERATIONS AND MAINTENANCE AGREEMENT WEAVERS POND SUBDIVISION DRY DETENTION BASINS #1, #2, & #3 L INTRODUCTION This manual establishes procedures for maintenance of the dry detention pond for the Weavers Pond Subdivision. These procedures are in compliance with the guidelines of DWQ Stormwater Runoff Management Policy that requires the dry detention pond be inspected and maintained as part of the development. A. Dry Detention Pond The dry detention pond will function as a stormwater control facility by providing temporary storage of post-development runoff in excess of pre-development runoff. The pond is designed to provide a 2-5 day discharge of the volume from a 1" rain in accordance with Division of Water Quality Policy. II. MAINTENANCE A. Vegetation The dry detention pond has a ground cover of fescue, which, if properly maintained, will prevent erosion of the embankment and provide an easy surface for inspection. Grass should be fertilized every October and April. Re-seeding - Periodically re-seeding may be required to establish grass on areas where seed did not take or has been destroyed. Before seeding, fertilizer (12-12-12) should be applied at a minimum rate of 12 to 15 pounds per 1,000 SF. The seed should be evenly sewn at a rate of three pounds per 1,000 SF. The seed should be covered with soil to the depth of approximately 1/4". Immediately following the planting, the area should be mulched with straw. Mowing - Grass mowing and removal of weed vegetation will be necessary for the proper maintenance of the embankment. All slopes should be mowed when the grass exceeds 8" in height. Acceptable methods include the use of weed whips or power brush cutters and mowers. Grass and vegetation clipping shall be bagged and removed from the site, they will not be allowed to remain on the ground which would result in washing into the storm water system. B. Erosion Erosion occurs when the water concentrates causing failure of the vegetation or when vegetation dies and sets up the environment for rill erosion and eventually gullies from the stormwater runoff. Proper care of vegetative areas that develop erosion is required to prevent more serious damage to the slopes. Rills and gullies should be filled with suitable soil compacted and then seeded. Where eroded areas are observed, the cause of the erosion should be addressed to prevent a continued maintenance problem. C. Standing Water • Areas where water "stands" shall be re-graded to provide a minimum 0.5% slope. D. Storm Water Sewers/Culverts A. Structural Elements - At a minimum, the structural elements of the underground stormwater culverts should be thoroughly inspected once a year. Several of the structural elements may need more frequent inspections. The inspections should include the following: The inside of the structure should be inspected for cracks, spalling, joint failure or leaks a minimum of once per year. If signs of cracks, leaks, misalignment, sagging or settlement of the structure or storm sewers are observed, a Civil Engineer or Geotechnical Engineer should be retained to determine the probable cause and recommended remediation. The orifice should be inspected and storm sewers should be inspected for debris or sediment accumulation after every major storm event. Any sediment or debris removal should be removed to prevent blockage. Sediment shall not be flushed into storm system and shall be collected and removed from the site. The outlet pipe should be visually inspected for sagging and alignment a minimum of once per year. III. OPERATION A. Record Keeping Operation of the dry detention pond should include recording of the following: • Annual Inspection Reports - A collection of written reports should be kept on file with the Homeowner's Association. A visual inspection should be conducted annually by a professional engineer or his/her representative. All visual observations should be recorded. • Maintenance - Recommendations for maintenance and/or repairs should be recorded within the Annual Inspection Report. • Other Operational Procedures - The Homeowner's Association should maintain a complete and up-to-date set of plans (as-built drawings) and all changes made to the dry detention pond over time should be recorded on the as-builts by a Professional Engineer. B. Sedimentation and Dredging The accumulation of sediment within the dry detention pond may require periodic removal to maintain sufficient capacity for storage of stormwater. The 10. Describe the overall project in detail, including the type of equipment to be used: The proposed project consists of the construction of a residential subdivision with typical utilities (i.e sewer, water). Typical construction and grading equipment will be utilized for this project. 11. Explain the purpose of the proposed work: The purpose of the proposed project is to develop a residential subdivision. 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. S&EC conducted a preliminary wetland delineation followed by detailed wetland delineation and Neuse Buffer evaluation in April of 2004. Ms. Jennifer Burdette, formerly of the USACE, verified our delineation on November 30, 2004 A sign-off map will be submitted at a later date. Mr. Michael Horan of the NC-DWQ conducted a site visit to determine features subject to the Neuse Buffer Rules (NBRRO#04-0211; letter is attached). No previous permits have been issued for the project. 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 future permit requests are anticipated for this project at this time. 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 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: Permanent impacts associated with road construction and widening include 0.15 acres of Zone -1 Neuse Buffer, 0.14 acres of Zone 2 Neuse Buffer. Temporary impacts due to sanitary sewer line installation and Page 3 of 10 additional access needed for the construction of the roads include 95 linear feet of stream channel, 0.33 acres of Zone 1 Neuse Buffer, 0.19 acres of Zone 2 Neuse Buffer, 030 acres of open water impacts and 0.396 acres of wetlands. 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, separately list impacts due to both structure and flooding. Wetland Impact Type of Wetland Located within Distance to Area of Site Number Type of Impact (e.g., forested, marsh, 100-year Nearest Impact on map) herbaceous, bog, etc.) Floodplain Stream (acres) ) es/no linear feet Utility Impact Permanent Headwater Forested No 0 0.132 Map #1 Temporary 0.264 Total Wetland Impact (acres) 0.396 3. List the total acreage (estimated) of all existing wetlands on the property: >0.5 acres 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 Perennial Average Impact Area of Number Stream Name Type of Impact Intermittent? t? Stream. Width Length Impact indicate on ma Before Impact linear feet acres Utility Impact UT to Beverdam Temporary Perennial +/_ 3 31 002 0 Map #1 Crk . Utility Impact UT to Beverdam Temporary Perennial +/- 3' 34 0 002 Map #1 Crk . Utility Impact UT to Beverdam Temporary Perennial +/- 3' 30 0.002 Map #2 Crk Total Stream Impact (by length and acreage) 95 0.006 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 Name of Waterbody Type of Waterbody Area of Site Number (if applicable) Type of Impact (lake, pond, estuary, sound, bay, Impact indicate on ma ocean, etc. acres Page 4 of 10 Crossing #1 N/A Road-temporary Pond 0.010 Crossing #1 N/A Utility-temporary Pond 0.020 Total Open Water Impact (acres) 0.030 6. List the cumulative impact to all Waters of the U.S. resulting from the proiect: Stream Impact (acres): 0.006 Wetland Impact (acres): 0.396 Open Water Impact (acres): 0.030 Total hn act to Waters of the U.S. (acres) 0.432 Total Stream Impact (linear feet): 95 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. N/A 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.): N/A Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond, local stormwater requirement, etc.): N/A Current land use in the vicinity of the pond: N/A Size of watershed draining to pond: N/A Expected pond surface area: N/A 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 client reauested a meliminarv and detailed wetland delineation and Neuse Buffer evaluation for the project prior to site plan development. The widening of Pippin Road (Crossings 1 and 2) is necessary to accommodate the increased traffic in the area, however the applicant has utilized the existing Right-Of-way to widen the road so no new stream impacts are proposed. Crossing 3 proposes to impact a ditched, intermittent stream within an agricultural field see attached USACE & DWO stream forms and photos). This crossing is needed for internal connectivity, to insure safety due to the number of lots served and to accommodate_ future development to the northern portion of the property. In addition, this is the only Page 5 of 10 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* Crossing 1 Multiplier Required (square feet Mitigation 1 273 perm 3 2 for Catawba) ( ) N/A 1,984 temp** 2 1,334 perm 1.5 N/A 641 temp Total 1,607 perm 1.5 N/A 2,625 temp * Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an additional 20 feet from the edge of Zone 1. ** Temporary Zone 1 impacts will not be impervious, these areas will be re-vegetated. Zone* Crossing 2 Multiplier Required (square feet Mitigation 1 1,52 tperm emp** 18 3 (2 for Catawba) N/A 2 835 perm 1.5 N/A 518 temp Total 837 perm 1.5 N/A 2,036 temp * Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an additional 20 feet from the edge of Zone 1. ** Temporary Zone 1 impacts will not be impervious, these areas will be re-vegetated. Zone* Crossing 3 Multiplier Required (square feet Mitigation 1 6,310 perm 3 (2 for Catawba) N/A 715 temp** 2 3,973 perm 1.5 N/A 452 temp Total 10,283 perm 1.5 N/A 1,167 temp * Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an additional 20 feet from the edge of Zone 1. ** Temporary Zone 1 impacts will not be impervious, these areas will be re-vegetated. Zone* 6 Utility Lines (square feet Multiplier Required Mitigation 1 10,409 3 (2 for Catawba) N/A 2 6,682 1.5 N/A Total 17,091 1.5 N/A * Zone I extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an additional 20 feet from the edge of Zone 1. Page 8 of 10 ... .. >'"'6.-_ _ sue. ? ?' .w'_._,. .'yam- a ? .. „? :.:s'Y;• -`3_?eaY_ ' ??kM" -*R a ..ts lot ROAD D- CROSSING #3, APPROXIMATE ; ` f , ?` _ >< c IMPACT AREA (FACING NORTHEAST) x W ^ W ?x o? a O a vi Q ? Mz ?U Q z? ?d A? da W o ? a LEVEL SPREADER OPERATION AND MAINTENANCE AGREEMENT WEAVERS POND SUBDIVISION The level spreader is defined as an elongated, level threshold, designed to diffuse stormwater runoff. Maintenance activities shall be performed as follows: 1. After construction and until vegetation has been established, level spreader(s) shall be inspected after every rainfall. Thereafter, level spreader(s) shall be inspected at least every month and more frequently during the fall season and after heavy rainfall events: a. Accumulated sediment, leaves, and trash shall be removed, and repairs made if required. b. Inspect level spreader(s) for evidence of scour, undercutting, settlement of the structure, and concentrated flows downhill from the level spreader(s). c. A level elevation shall be maintained across the entire flow-spreading structure at all times. Repair or replace the level spreader if it is damaged. d. Mow vegetative cover to a height of six (6) inches and prune plants if they cover over half of the level spreader surface. e. Repair eroded areas and replace/replant dead or damaged vegetation. 1. Vegetation Grass should be fertilized every October and April. Re-seeding - Periodically re-seeding may be required to establish grass on areas where seed did not take or has been destroyed. Before seeding, fertilizer (12-12-12) should be applied at a minimum rate of 12 to 15 pounds per 1,000 SF. The seed should be evenly sewn at a rate of three pounds per 1,000 SF. The seed should be covered with soil to the depth of approximately 1/4". Immediately following the planting, the area should be mulched with straw. Mowing - Grass mowing and removal of weed vegetation will be necessary for the proper maintenance of the embankment. All slopes should be mowed when the grass exceeds 8" in height. Acceptable methods include the use of weed whips or power brush cutters and mowers. 2. The contractor should avoid the placement of any material on and prevent construction traffic across the structure. If the measure is damaged by construction traffic, it shall be repaired immediately. 3. Inspect and repair the collection system (e.g., catch basins, pipes, swales, riprap) four (4) times a year to maintain proper functioning. I acknowledge and agree by my signature below that I am responsible for the performance of the seven maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Print name(: Qc ;a P r , 0 ' 4Vj Title:' Il-. WL+e(1 N-A Address: Zoe S&7 AA^ 041 Ct,;4y, C?4z tof Ala" a" . aY?.. `t?-?-' Signatt Date: 1i1 131 o b Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has _ been named the president. a Notary Public for the State of do hereby certify that personally appeared before me this 1----a <aOC6 and acknowledge the due execution of the forgoing wet [wetland] detention basin maintenance requirements. Witness my hand and official seal, o, V* o?ARy 2 PUgoG 0 Coll SEAL 1 My commission expires ?? ?? frequency of this sediment removal can be reduced by ensuring that the site areas around the upland areas are stabilized with a vegetative ground cover such that it restrains erosion. The removed material should be hauled offsite to a suitable site or mounded somewhere on site and stabilized with a ground cover sufficient to restrain erosion. I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Note: a Notary Public for the State of .YC e- , do hereby certify that personally appeared before me this day of V Q`oyoac ti and acknowledge the due execution of the forgoing wet [wetland] detention basin maintenance requirements. Witness my hand and official seal, C,\N R. 4f, ?Qrf• Z q?'c9f Flt. < t ?Z?.,.jOusu?° v COUN?y.0"S SEAL My commission expires Quo The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. 2 Address: k( SUPA&w, Oas 06-A, 13,L Z51 HA"-L I s 0r 1 dAAMMV