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HomeMy WebLinkAboutSDP200600043 Review Comments 2005-07-26ffN.l County of Albemarle Department of Community Development Memorandum To: Bill Fritz, designated Agent for Current Development From: Glenn Brooks, designated County Engineer for Current Development Date: 26 July 2005 Subject: Private street standard for streets serving non - residential, non - agricultural, attached residential, multi -unit residential and combined residential and non - residential uses. As the designated County Engineer for Current Development, this is my recommendation for an alternative private street standard according to Subdivision Ordinance section 14 -412B; (referenced from 18- 32.7.3 and 14 -233) B. Private streets serving non - residential, non - agricultural, attached residential, multi -unit residential and combined residential and non - residential uses. Each private street authorized to serve non - residential, non- agricultural, attached residential, multi -unit residential and combined residential and non - residential uses under sections 14 -232 or 14 -233 shall satisfy Virginia Department of Transportation standards or an alternative standard deemed adequate by the agent, upon the recommendation of the county engineer, to be equivalent to or greater than the applicable standard in the design standards manual, so as to adequately protect the public health, safety or welfare. The agent may require minimum travelway widths to provide for on- street parking upon a determination that the provisions for off - street parking may be inadequate to reasonably preclude unauthorized on- street parking. The recommended alternative standard is; Maximum Grade: 10% Minimum Sight Distance: 100 ft. Minimum Horizontal Curvature: as necessary to maintain sight distance Minimum Vertical Curvature: crest K = 5, sag K = 15 Minimum Width, curb face to curb face: 20' without parking, or 24' travelway parking dimensions as required by the Zoning Ordinance. All other applicable standards are to be per VDOT Subdivision Street requirements, such as guardrail and pavement design requirements. Clear zone requirements and recommended speeds are not deemed applicable. Turnarounds are not necessary in parking areas where adequate space has been provided for backing, and three -point turns, and emergency vehicle access as indicated by the Fire /Rescue Department. Minimum curb radii at intersections are to be 12.5' feet according to VDOT standards. This standard is meant to match the standards from the Zoning Ordinance used for parking areas and travelways (section 18- 4.12.15). We have discussed this reasoning many times in the past, essentially that an accessway deemed safe and convenient for the intended use remains safe and convenient regardless of whether it is subdivided or not, calling it a travelway or a street. We now have a number of site plans under review which require this policy clarification, and there is no guidance currently available in the Design Manual as referenced in the Subdivision Ordinance adopted last month. Should this standard be deemed adequate by the Agent, it is recommended it be included in the Design Manual upon the next revision. q J County of Albemarle Department of Community Development Memorandum From: Glenn Brooks, Current Development engineering review Date: 16 Nov 2005, Rev. 1: 14 Feb 20065 Subject: Luxor at Pantops, preliminary site plan (SDP200500 1 1 7) The preliminary site plan for Luxor at Pantops has been reviewed. The following continents must be satisfactorily addressed before approval can be recommended, Rev. 1: As not all continents have been addressed Site Review, it is reconnnended that the preliminary site plan be denied. Detailed comments regarding each item are provided below. Existing topography must be provided. It must be current to the time of submittal or revision. The plan does not appear to be accurate, nor reflect neighboring structures and other details. [18- 32.5.6d] Rev. 1: The topography appears reasonably accurate. It ntav need to he updated with ongoing activities bcfore,final site plan and erosion control plan approval. The source of topography must be provided. [18 32.5.6a] Rev. I. Cornrnent addressed. 3. The source of the boundary survey must be provided. [18- 32.5.6a] Rev. I. Contntent addressed. 4. The proposed grading must be provided. There are stray lines on the drawings which are not understood. There appear to be significant errors with the grading around the ponds [18- 32.5.6d] Rev. l: The proposed grading is cut cuff on sheet 9. There appears to he grading, for the recreation area and drainage items which are not complete. 5. Areas of the site where existing slopes are 25% or greater must be provided. [18- 32.5.6d] Rev. l: Continent addressed. Please see the separate rnentorandurn regarding the waiver to develop on areas of critical slopes. 6. Existing and proposed streets must be provided. [32.5.6i] The Luxor roads are not all existing as indicated on the plans. The phase III Luxor roads have not been approved. Rev. I. The road plans fin- phases 2 and 3 in Luxor are approved. This plan has changed sonic of the grading and drainage otttfalls, and it is not clear on this plant ivhat the divisions between the two projects ti ill be. 1Vhich proposed contours arc,for this plant, and which are fin the road plans? 7. It has not been established that stormwater management has been accommodated for this project. The approval of the stormwater management plan for the ponds was rescinded, due to changes being made to the plans subsequent to approval, as reflected on road plan revisions. In addition, the drainage areas and impervious cover assumptions of the pond computations do not appear to agree with the preliminary site plan. The impervious coverage and areas must agree with the computations and drainage area maps. Rev. 1: Cornrnent not addressed. The stormwater management plus fir Luxor hers been re- approved. Hotii'ever, some of the area a.ssnrned to he undeveloped in the .storntti ester managcnnent plan is Current Development Engineering Review Comments Page 2 of 3 proposed to be developed on this plan. C017"ectiOns need to be made. Proposed changes to the pond areas must be approved on a revised stormwater management plan prior to approval of the preliminary site plan. This plan has proposed changes to the dam of Pond #2, a reduction in one of the forebays, and elimination of the access road to the forebay, which must be replaced. Rev. l: The new stormwater management plan shows the spillway for pond #2 being removed. However, that grading has changed with this plan, and one of the forebays is still shown regraded. In addition, the access road to the ,forebays has not been replaced. The site plan and stortnivater plan must be revised to accommodate these changes. Principle access must be free of flooding, and structures also. [18- 32.7.2.3, 14 -410F, 18 -30.3] Proposed units 145 -157, between the ponds, will not meet these requirements. Overland flow relief must be accommodated. Rev. l: Connncnt not addressed. Overland relief away from the units must be provided for the proposed development to be safe. The proposed development in this area is still at risk of flooding and erosion if the pond outlet structures should,fail. 10. Easements or letters of intent for off -site work are required. This plan appears to show proposed work on Fontana property. [DSM 1102] Rev. l: Comment addressed with Luxor plans. 11. A parcel interconnection should be provided to the property line in front of units 72 -73. [18- 32.7.3, 14 -409] Rev. l: Connnent not addressed. Please show the road built to the property line with reser rations for grading and construction to connect. 12. The abrupt corner in the private road next to units 175 -176 should be revised to a standard road curve. 18- 32.7.2, DSM902A5, 14 -412B] Rev. 1: The abrupt corner is still on the plan, however this travelway is now an alley, tirith a lesser standard, which makes this corner acceptable with a sight distance easement to he provided. 13. The height of retaining walls next to residential units is a safety concern on this plan. Final plans will need to make safety provisions, or reduce retaining wall heights. Rev. l: Safety concerns on the ~malls can be addressed with final plans. 14. Adequate road frontage has not been provided for lots 196 -198, which will be a hindrance to subdivision, per 14 -403. Rev. l: This comment addressed by the new road layout. 15. The drainage through the rear of lots will need to be in easement on final plans. [18- 32.6.6, DSM Chapt. 11 ] Rev. l: Corrnnent partially addressed by regrading. Drainage through the rear of lots is still a concern with lots 1 -16, 64 -102, and 149 -160. Because some of these comments may require extensive revisions, and not all information was provided, additional continents may be necessary when revisions are made. Rev. l: See below. Current Development Engineering Review Comments Page 3 of 3 16. Rev. l: Sight distance and merging of vehicles at the intersection created by the split in Pavillions Court is a concern. [18-32. 7.2] The 10' retaining wall next to the travelnay is a safety concern and will require guardrail. Please revise this roadway to a standard intersection with intersection angle greater than 80 degrees per 14 -410B, or a single roadway. 03/17/06 FRI 10:07 FAX 434 972 4035 DIV OF CLIKREiv ' llhvtt,urBlr. -,- V , n COUNTY OF ALBEM Department of Community Development 401 .McIntire Road, Room 227 Charlottesville, Virginia 229024596 Phone 434) 296 -5832 _ Fax (434) 9724126 March 17, 2006 Katurah Roell Virginia Land Company P0 Box 8147 Charlottesville, VA 22906 RE: SDP- 2005 -4117 Luxor at Pautops Preliminary Site Plan Dear Sir: The Planning Commission approved the critical slopes waiver and open space appropriateness for the above - referenced site plan at its March 14, 2006 meeting with the following conditions: 1. [ 13.4. 1] A conservation plan as specified in section 32.7.9 must be approved by the Zoning; & Current Development Division of the Department of Community Development with a copy of the original conservation plan and all subsequent revisions to be submitted to thi, Zoning & Current Development Division. 2. [14 -317, 18 -4.71 Submittal of covenants or other such instrument which evidences the establishment of an owners' association and provides for ownership and maintenance; of proposed open space. Such document shall be subject to County Attorney review and approval and shall be in accordance with Section 14 -317 of the Subdivision Ordinance - Instrument evidencing maintenance of certain improvements. The Department of Community Development hereby grants administrative approval to the above referenced site plan. The approval of the preliminary site plan is valid for (1) one year in accordance with Section 32.4.3.1 of Chapter 18 of the Albemarle County Code. Therefore, the preliminary approval shall expire on March 17, 2007. If the preliminary site plan approval expires, a new application trust be filed and processed. Please address all of the requirements and conditions listed below and submit eight (8) tentative plan copies to the Department of Community Development. This letter must: be submitted with the tentative plates, as a checklist, to document that you have addressed all requirements or conditions, or the tentative plan will be denied. Erosion arid Sediment Control, BMP Stormwater Management, and road plans with the associated applications and fees must also be submitted with the eight (8) tentative Plans. Once the tentative plan is submitted and reviewed you will receive comments from all departments /divisions /agencies t hate made comment ou the tentative plan. Any further responses must be made directly to each department/division /agency that has further comment. 03/17/06 FRI 16:07 FAX 434 972 4035 DIV OF CURRENT DEVFLUME After all aforementioned departmentsldivisions /agencies have granted tentative approval, you must verify with the planner that you may submit the final mylars (2 sets), paper copies (2 sets), the final site plan application, and final site plant fee to the Department of Community Development. Signing of the plans will occur within one week once it is determined that the final site plan mylars reflect all tentative approvals. The final site plan will be subject to all final site plan requirements (Zoning Ordinance Section 32.6), in addition to the following conditions. The Department of Community Development shall not accept submittal of the final site plan for signature until tentative approvals for the following conditions have been obtained: Zoning & Current Development approval to include: 18- 32.6.3] Approval of a landscape plan in compliance with Section 32.79. Specifically needing to meet the 20% canopy requirement; 18- 32.6.6.j and 18 -4.17] Submittal of a description and photograph or diagram and show the location of each type of outdoor luminaire that emits 3,000 or more initial lumens. Please be aware that installation of such luminaires in ffie future that are not shown on this plan shall require an amendment to this plan; 18-32.6-6.j and 18 -4.17] Submittal of a photometric plan on the site plan demonstrating that parking area luminaires are in compliance with 4.17.4.b 18- 32.6.4.1 ] The final plan approval is subject to the issuance of a Certificate of Appropriateness from the Architectural Review Board. Please contact Francis MacCall at 296 if you have questions or require additional information. Engineering ap rn oval to include: 18- 32.5.6d]The proposed grading must be provided. There are stray lines on the drawings which are not understood. There appear to be significant errors with the grading around the ponds. The proposed grading is cut off on sheet 9. There appears to be grading for the recreation area and drainage items which are not complete. 32.5.6i] Existing and proposed streets must be provided. The Luxor roads are not all existing as indicated on the plans. The phase M Luxor roads have not been approved. The road plans for phases 2 and 3 in Luxor are approved. This plan has changed some of the grading and drainage outfalls, and it is not clear on this plan what the divisions between the two projects will be. Which proposed contours are for this plan, and which are for the road plans? It has not been established that stormwater management has been accommodated for this project. The approval of the stormwater management plan. for the ponds was rescinded, due to changes being made to the plans subsequent to approval, as reflected on road plan revisions. In addition, the drainage areas and impervious cover assumptions of the pond computations do not appear to agree with the preliminary site plan. The impervious coverage and areas must agree Nvith the computations avid drainage area maps. The stormwater management plan for Luxor has been re- approved. However, sonic of the area assumed to be undeveloped in the stormwater management plan is proposed to be developed on this plan. Corrections need to be made. Proposed changes to the pond areas mast be approved on a revised stormwater management plan prior to approval of the preliminary site plan. This plan has proposed changes to the dam of Pond #2, a reduction in one of the forebays, and elimination of the access road to the forebay, which must be replaced. The new stormwater management plan shows the spillway for pond #2 being removed. However, that grading has changed with this plan, and one of the forebays is still shown re, In addition, the access road 41 UUJ 03/17/06 FRI 16:08 FAX 434 972 4035 DIN' OF CURRENT DEVLLUFMt to the forebays has not been replaced. The site plan and stormwater plan must be revised to accommodate these changes. 18- 32.7.2.3, 14.41 OF, 18 -30.3] Principle access must tie free of flooding and structures also. Proposed units 145 -157, between the ponds, will r..ot meet these requirements. Overland flow reliefmust be accommodated_ Overland relief away from the units must be provided for the proposed development to be safe. The proposed development in this area is still at risk of flooding and erosion if the pond outlet structures should fail. 18- 32.7.3, 14 -4091 A parcel interconnection should be provided to the property line in front of units 72 -73. Please show the road built to the property line with reservations for grading and construction to connect. 18- 32.7.2, DSM902A5, 14412B] The abrupt comer in the private road next to units 175 -176 should be revised to a standard road curve. The abrupt corner is still on the plan, however this travelway is now an alley, with a lesser sundard, which makes this corner acceptable with a sight distance easement to be provided. The height of retaining walls next to residential units is a safety concern on this plan. Final plans will need to make safety provisions, or reduce retaining wall heights_ Safety concerns on the walls can be addressed with final plans. 18- 32.6.6, DSM Chapter 11] The drainage through the rear of lots will need to be in easement on final plans. Comment partially addressed by regarding. Drainage through the rear of lots is still a concern with lots 1 -16, 64.102, and 149 -160. All applicable items as specified in the Design Standards Manual, Section 902 B. Please contact Glenn Brooks at 296 -5532 if you have questions or requite additional information. Albemarle County Service Authority approval to include: Review and approval of all final water and sewer plans. Please contact Gary Whelan at 977 -4511 if you have questions or require additional information. Fire & Rescue approval to include: - El [14 -418] Verify adequate fire flow is available. Please contact James Barber at 296 -5833 if you have questions or require additional information. VDOT approval to include: CI Review and approval of all final road plans and drainage computations. Please contact John 'Winn at 293 -0014 if you have questions or require additional information_ Sincerely, Francis H MacCall Senior Planner Zoning & Current Development U. VV4 File: SDP - 2005 -00117 Review Comments Project Name: Pavilions at Pantops Phase I - Final Final — Residential — Administrative Date Completed: Wednesday, May 10, 2006 Reviewer: Gary Whelan Department/Division /Agency: ACSA Reviews Comments Water and sewer construction drawings must be reviewed and approved before approval is granted. Gary Review Status: Pending Page: 1.00 County of Albemarle Printed 0 Friday, June 09, 2006 Review Comments Project Name: Pavilions at Pantops Phase I - Final Final — Residential — Administrative Date Completed: Saturday, May 20, 2006 Reviewer: James Barber Department/Division /Agency: Fire Rescue Reviews Comments Dead -end fire apparatus access roads in excess of 150 feet in length shall be provided with an approved area for turning around fire apparatus (Virginia Statewide Fire Prevention Code 503.2.5). Review Status: Requested Changes Page: 1.00 County of Albemarle Printed 0 Friday, June 09, 2006 J oFA1 r County of Albemarle Department of Community Development Memorandum To: Justin Shimp From: Francis H. MacCall, Senior Planner Division: Zoning & Current Development Date: 6 /9/06 Subject: SDP - 2006 -0043 Pavilions at Pantops Phase 1 Final Site Plan The Planner for the Zoning & Current Development Division of the Albemarle County Department Community Development will approve the final site plan when the following items have been satisfactorily addressed. (The following comments are those that have been identified at this time. Additional comments or conditions may be added or eliminated based on further review.) [Each comment is preceded by the applicable reference to the Code of Albemarle.] 1. [ 14 -317, 18 -4.7] Submit the covenants or other such instrument which evidences the establishment of an owners' association and provides for ownership and maintenance of the proposed open space and private streets and alleys. Such document shall be subject to County Attorney review and approval and shall be in accordance with Section 14 -317 of the Subdivision Ordinance - Instrument evidencing maintenance of certain improvements. 2. [4.12.16 c2] The parallel parking spaces need to be 9' X 20' 3. [32.7.2.8] Provide CG -12 curb cuts at all transitions from sidewalk to travelways. 4. [32.6.6 tj Provide the signature panel as follows. Provide this panel for all future submittal for site plans. APPROVALS DATE DEPARTMENT OF COMMUNITY DEVELOPMENT PLANNER/ZONING ENGINEER INSPECTIONS ARB DEPARTMENT OF FIRE RESCUE ALBEMARLE COUNTY SERVICE AUTHORITY VIRGINIA DEPARTMNENT OF TRANSPORTATION HEALTH DEPARTMENT 5. [32.7.9] Consider providing landscaping all the way around both of the stormwater facilities. 6. [32.7.9] More street trees are needed along Verona Drive. 7. [32.7.9] The plan cuts off at the basketball court. Show the plan all the way to the proposed property line and provide additional street trees along that portion. 8. [32.7.9] The numbers of plantings in schedule and what is shown on the plan do not match. Please verify and correct as needed. Please contact me at your earliest convenience if you have questions or require additional information. Copy: SDP -2006 -0043 Albemarle County Engineering review comments Page 4 of 4 limit signs should be on each street. Rev.2: comment does not appear adequately addressed. Locations for County 911 street name signs and speed limit signs not found. Please provide locations for the County required" signs on the road plans. 4. The waivers for 12% grade on Whispering Hollotit• are .slipported. The waiverfior a 12% grade can be supported on Verona Court if parking is removed along this section of road. Rev.2: continent addressed. S. The sag curve orz Verona Court does not ineet inininzuln standards. Rev?: comment adch•esscd. 6. The sag curve on Whispering Hollow does not meet inininnan standards. y Rev. 2: comment addressed. 7. On Whispering Hollow the road vertical curvature needs to transition into a negative 2% grade oll'Rolkin Road. v Rev. 2: comment addressed. 8. Please droll' cross-& ins and lmderdrain.s where required per VDOT standards oil the plan and profile. v Rev. 2: comment adth- essed. C. Stormwater Management and Mitigation Plan: (WP0200400011) An amended stormwater management plan was submitted on May 22. Comments will be forth coming. Rev. l: The stormwater plan amenthnent has been approved, and the updated infuriation and grading should appear on this plan. Rev. 2. comment ad(h— sled D. Erosion Control Plan: An erosion control plan was not included with this submittal. Rev.l:.an erasion control plan has not been received. Rev.2: k, - C Plan has beer! subnitted and ii be revieli sepal-citely. 12 COUNTY OF ALBEMARLE Department of Community Development 401 McIntire Road, Room 227 Charlottesville, Virginia 22902 -4596 Phone (434) 296-5832 Fax (434) 972 -4126 Project: The Pavilions at Pantops Phase 1 9 73 —(4S -e Plan preparer: - --- Justin ShiWp, The Engineering Groupe Inc. (fax 296.649 ) Owner or rep.: KafiuuTn)g---R ell, North Pantops Townhouses LLC (fax 296 -3510) Plan received date: 02 May 2006 Date of comments: 05 July 2006 Reviewer: Mark Chambers A. Final site plan: r 1. The final set of drawings must have a signed and dated professional seal (18- 32.6.1). 2. Please provide typical sections for proposed stornwater conveyance channels and incorporate the channels into proposed topography on the plan view drawings (18- 32.6.6.d.1). 3. Please provide a drainage summary table (I 8- 32.6.6.d.1 &2, DSM- 909.1.13.1)). 4. Please dimension and label storm structures on the plan view drawing i.e. pipe length, diameter, material, inlet type and rim or top elevation (18- 32.6.6.d.3, DSM- 909.1.B.2 4 &7). 5. Please provide a drainage easement over storm system P4 through P1 where it crosses private property. 6. Please provide scour protection at the end of all pipe and channel outlets (DSM - 909.1.13.3, 505.C.6, 505.D.13). 7. Please extend all pipe outlets to the bottom of slopes or provide an adequate channel to the bottom of slopes [DSM- 803.1.0 and 505.0 (4)]. 8. Please specify VDOT inlet shaping (IS -1) or provide manhole protection everywhere flow drop is greater than 4' in manhole structures (DSM- 505.D.9). 9. Please provide safety stabs for manholes greater than 10' deep (DSM- 505.D.9). 10. For inlets in a sump condition, please provide capacity computations using I value of 6.5 in /hr (DSM- 505.G. I ). 11. Please provide capacity and velocity computations for proposed channels (DSM 505.C.1). 12. Pipe velocity for design flow must be less the 10 fps (DSM- 505.E.7). 13. Please review your pipe comps, in some instances flow accumulation (ACC "Q ") is not adding up. 14. Please provide comps for the existing storm system down stream of proposed structure 45 to demonstrate adequacy of the existing system for the added flow. 15. Please review your inlet comps, bypass from one inlet must be intercepted by another inlet. An inlet in a sump cannot have bypass to an outlet as indicated in the comps (see inlet 40 bypass target is structure 39 which is an outlet), Inlets in a sump condition like 40 must pass the flow from a "check storm" with an I value of 6.5 without overtopping the curb (see comment #9). [DSM- 505.G.1 ] 16. The following places need stormwater infrastructure to convey runoff: a. East end of Wispering Hollow Lane; b. The turn around at the end of Montessori Terrace; c. The Corner of the parking lot in front of lot 161; d. Please pipe the runoff from the parking area and travel way behind units 143 — 148; e. The existing pipe outletting beside lot 1. 17. The parking island in front of lot 205 doesn't provide for stormwater to pass through at the curb line. 18. Please address the unusual curb configurations along Verona Drive and Rolkin Road where the curb tails out into the adjacent parcels. 19. Please provide curb and gutter along the south end of Verona Court. 20. Guardrail is required at the end of Whispering Hollow Lane to prevent vehicles from going over the retaining wall. 21. Please remove the curb separating the perpendicular parking from the street on the "Typical Detail- Private Road with Parking" (sheet 3). Pavement design and other road requirements will be reviewed with the road plan. 22. Please show the sanitary laterals and ensure they are covered by an appropriate easement. 23. Where public side walks cross private lots they need to be in access easements. 24. Please extend the public side walk in front of, and, add a lead walk to, unit 103. 25. Access isles, parking stalls alleys and roads exceed the maximum 10% gradient in the following areas: (i) Behind units 52 -63; (ii) Wispering Hollow Lane near lot 149; (iii) Alley off corner of lot 17; (iv) Alley north of lot 57. Please design these areas to a maximum gradient of 10% (18- 4.12.17.a, policy). 26. Please provide a turn around for the alley behind lot 29 [DSM -604.B (4)]. 27. Parking areas and access isles do not meet the minimum dimensions behind lots 59 -63, 140- 142 and 143 -148. Please correct this condition (18- 4.12.16.a.b &c, DSM- 602.1). 28. Please review the proposed grading and make corrections, for example, areas where proposed contours do not tie into anything (lot 107), where proposed contours tie into homes above first floor elevation (lot 2), unusual parking lot grade on Verona Court in front of lot 211, grade bust behind lots 30 -32. B. Road and drainage plans: 1. Road plans were not provided with this submittal. Drainage computations were reviewed with the site plan. C. Stormwater Management and Mitigation Plan: 1. An amended stormwater management plan was submitted on May 22. Comments will be forth coining. D. Erosion Control Plan: 1. An erosion control plan was not included with this submittal. Copy: file File: El_rp GEB n.doc COUNTY OF ALBE11 RLE Plai., ,,view Comments Department of Engineering & rublic Works i 434) 296 -5861 Fax (434) 972 -4035 ' r www.albemarle.orgrengineer Project: Luxor, Amendment to SWM plan for Luxor & North Pantops Commercial Plan preparer: Rivanna Engineering (fax 984 -8863) Owner or rep.: Va. Land Co. (fax 296 -3510) Plan received date: 22 May 2006 Date of comments: 12 July 2006 Reviewer: Mark Chambers A. Stormwater management plan comments: ` (WPO- 2004 - 00011) ( Amenement) 1. Please move the emergency spillway to the east, off the embankment till section, and provide a cross section detail (VSMH, Minimum Standard 3.03). 2. Please provide an exit channel for the spillway in accordance with VSMH, Minimum Standard 3.03 When comparing the amended "Hydrologic! Hydraulic Calculations" to the approved calculations prepared by Rivanna Engineering & Surveying, revision date: July 1, 2005, we found that the runoff coefficients for drainage areas 1 and 3 were reduced slightly and the coefficient for drainage area 2 was unchanged. This is unexpected considering the reason for the plan amendment is that the proposed type of development has become denser and the amount of open space decreased since approval of the July 1, 2005 computations. Please provide more information on how you arrived at the runoff coefficients and why the coefficients have decreased instead of increased with the more intense development. We offer the following additional comments: a. The .3 runoff coefficients used for the drainage areas of the basins (labeled open space in calculations) is not representative. These small areas are dominated by the basins and any rain that falls directly into the basins will become part of the basins' hydraulics. Additionally the slopes around the basins are generally steep reducing infiltration ability of the soils; b. The 3.3 acres of drainage area 3 in Ashcroft is considered woods and brush in the amended calculations and was considered .5 acre lots in the approved computations; C. The combined area of the 3 watersheds has decreased .65 acres in the amended calculations, however, the boundaries of the drainage areas appear to be the same. i. tL 1, t r\ -. Att l RGP \ COUNTY OF ALBEMARLE Department of Community Development 401 McIntire Road, Room 227 Charlottesville, Virginia 22902 -4596 Phone (434) 296 -5832 Fax (434) 972 -4012 December 4, 2006 Justin Shimp 2148 Berkmar Drive Charlottesville, VA 22901 RE: ARB- 2006 -121: Pavilions at Pantops, Phase 1 : Final Review of a Site Development Plan Tax Map 078, Parcel 12) Dear Mr. Shimp: The Albemarle County Architectural Review Board reviewed the above noted item at its meeting on Monday, November 20, 2006. The Board unanimously approved the certificate of appropriateness for ARB- 2006 -121, Pavilions at Pantops, Phase 1, pending staff administrative approval of the following conditions: 1. Shift the London Plane tree out of the easement west of townhouse #1. 2. Revise the plan to clearly indicate all options chosen for the wall fixture: lamp type, wattage, finish, etc. The lamp for the proposed fixture shall emit less than 3000 lumens. 3. Show the depth of the landscape easement along Rolkin Road on the plan. Ensure that the easement and the plants in the easement do not conflict with other requirements. 4. Revise the covenants to include a clause stating that the Home Owner's Association will ensure that no materials and /or colors other than those approved by the Albemarle County Architectural Review Board shall be used for this project. S. The elevations for townhouses 29 and 30 through 32 shall not be blank. Provide elevations for review. 6. Consider Oaks and Maples as replacements for the London Plane and White Ash trees. 7. Add the following note to the plan: All site plantings of trees and shrubs shall be allowed to reach, and be maintained at, mature height; the topping of trees is prohibited. Shrubs and trees shall be pruned minimally and only to support the overall health of the plant. Please provide: 1. Two full sets of revised drawings addressing each of these conditions. Include updated ARB revision dates on each drawing. 2. A memo including detailed responses indicating how each condition has been satisfied. If changes other than those requested have been made, identify those changes in the memo also. Highlighting the changes in the drawing with "clouding" or by other means will facilitate review and approval. ARB 2006 -121 Pavilions at Pantops Phase 1 Page 2 of 2 December 4, 2006 3. The attached "Revised Application Submittal" form. This form must be returned with your revisions to ensure proper tracking and distribution. When staffs review of this information indicates that all conditions of approval have been met, a Certificate of Appropriateness may be issued. If you have any questions, please do not hesitate to contact me. Sincerely, Margaret Maliszewski Design Planner Planning Division MMM /aer Cc: Southern Development (Charlie Armstrong) 170 South Pantops Drive, Charlottesville, VA 22911 North Pantops Townhouses LLC P O Box 8147, Charlottesville, VA 22906 File COUNTY OF ALBEMARLE Department of Community Development 401 McIntire Road, Room 227 Charlottesville, Virginia 22902 -4596 Phone (434) 296 -5832 Fax (434) 972 -4126 Project: The Pavilions at Pantops Phase 1 Plan preparer: The Engineering Groupe Inc. (fax (434) 973 -4584) Owner or rep.: North Pantops Townhouses LLC (fax (434) 296 -3510) Southern Development (fax 245-0895) Plan received date: 02 May 2006 Rev. 1: 15 Nov 2006 Date of comments: 05 July 2006 Rev.]: 3 Jan 2006 Reviewer: Mark Chambers Rev. 1: Glenn Brooks A. Final site plan (SDP200600043) I . The final set of drawings must have a signed and dated professional seal (18- 32.6.1). Rev. 1: comment addressed 2. Please provide typical sections for proposed stormwater conveyance channels and incorporate the channels into proposed topography on the plan view drawings (18- 32.6.6.d. I). Rev. 1: comment not addressed. 3. Please provide a drainage summary table (18- 32.6.6.d.1 &2, DSM- 909. 1.B.D). Rev. 1: comment addressed 4. Please dimension and label storm structures on the plan view drawing i.e. pipe length, diameter, material, inlet type and rim or top elevation (18- 32.6.6.d.3, DSM- 909.1.13? 4 &7). Rev. l: comment addressed. 5. Please provide a drainage easement over storm system P4 through P1 where it crosses private property. Rev.]: con7me77t pc7rtiully addressed. A deed and easement will have to he recorded prior to or with approval offinal plats. 6. Please provide scour protection at the end of all pipe and channel outlets (DSM- 909.1.B.3, 505.C.6, 505.D.13). Rev. 1: co77777ment partially addressed please p7'ol'7de o77tlet protection CI7777e77s7ons allcl ,specs per outlet veloc 7. Please extend all pipe outlets to the bottom of slopes or provide an adequate channel to the bottom of slopes [DSM- 803.1.0 and 505.0 (4)]. Rev. ]: comment not addressed 8. Please specify VDOT inlet shaping (IS -1) or provide manhole protection everywhere flow drop is greater than 4" in manhole structures (DSM- 505.D.9). Rev. l: comment addressed. 9. Please provide safety slabs for manholes greater than 10' deep (DSM- 505.D.9). Rev.]: comment addressed. 10. For inlets in a sump condition, please provide capacity computations using I value of 6.5 in /hr (DSM- 505.G.1). Rev. l: comment addressed. 11. Please provide capacity and velocity computations for proposed channels (DSM 505.C.1). Albemarle County a, Engineering review comments Page 2 of 3 Rev. 1: comment not acldressecl. 12. Pipe velocity for design flow must be less the 10 fps (DSM- 505.E.7). Rev. 1: please disregard Outlet velocities must he designed per outlet protection. 13. Please review your pipe comps, in some instances flow accumulation (ACC "Q ") is not adding up. Rev.]: Pipe comps are in need of revision. Please ensure all pipes are within open channel flow capacities. 14. Please provide comps for the existing storm system down stream of proposed structure 45 to demonstrate adequacy of the existing system for the added flow. Rev. l: as for item 13. 15. Please review your inlet comps, bypass from one inlet must be intercepted by another inlet. An inlet in a sump cannot have bypass to an outlet as indicated in the comps (see inlet 40 bypass target is structure 39 which is an outlet), Inlets in a sump condition like 40 must pass the flow from a "check storm" with an I value of 6.5 without overtopping the curb (see comment #9). [DSM- 505.G. I] Rev. l: comment addressed. 16. The following places need stormwater infrastructure to convey runoff: a. East end of Wispering Hollow Lane; b. The turn around at the end of Montessori Terrace; c. The Corner of the parking lot in front of lot 161; d. Please pipe the runoff from the parking area and travel way behind units 143 — 148; e. The existing pipe outletting beside lot 1. Rev. 1: comment d is not addressed. 17. The parking island in front of lot 205 doesn't provide for stormwater to pass through at the curb line. Rev. 1: comment adch•es.sed 18. Please address the unusual curb configurations along Verona Drive and Rolkin Road where the curb tails out into the adjacent parcels. Rev. 1: The splitter island fronn the roundabout should he continued, for at least 50', with a break fior pedestrian access. 19. Please provide curb and gutter along the south end of Verona Court. Rev. 1: comment addressed. 20. Guardrail is required at the end of Whispering Hollow Lane to prevent vehicles from going over the retaining wall. Rev. 1: comment partralh' addressed by note. Please revise the grading to allow adequate space, and show the guardrail. 21. Please remove the curb separating the perpendicular parking from the street on the "Typical Detail- Private Road with Parking" (sheet 3). Pavement design and other road requirements will be reviewed with the road plan. Rev. l: comment addressed 22. Please show the sanitary laterals and ensure they are covered by an appropriate easement. Rev. 1: comment addressed. 23. Where public side walks cross private lots they need to be in access easements. Rev. l: comment addressed 24. Please extend the public side walk in front of, and, add a lead walk to, unit 103. Rev. 1: comment addressed. 25. Access isles, parking stalls alleys and roads exceed the maximum 10% gradient in the following areas: (1) Behind units 52 -63; (ii) Wispering Hollow Lane near lot 149; (iii) Alley off corner of lot 17; (iv) Alley north of lot 57. Please design these areas to a maximum x _ Albemarle County Engineering review comments Page 3 of 3 gradient of 10% (18- 4.12.17.a, policy). Rev. l: see road plans comments. 26. Please provide a turn around for the alley behind lot 29 [DSM -604.13 (4)]. Rev. 1: comment addressed. 27. Parking areas and access isles do not meet the minimum dimensions behind lots 59 -63, 140- 142 and 143 -148. Please correct this condition (18- 4.12.16.a.b &c, DSM - 602.1). Rev. 1: comment addressed. 28. Please review the proposed grading and make corrections, for example, areas where proposed contours do not tie into anything (lot 107), where proposed contours tie into homes above first floor elevation (lot 2), unusual parking lot grade on Verona Court in front of lot 211, grade bust behind lots 30 -32. Rev. 1: comment addressed B. Road and drainage plans: Road plans were not provided with this submittal. Drainage computations were reviewed with the site plan. Rev. 1: Road plans for private streets and alleys were included with the site plan revision, and the following comments are provided 1. Please use the latest general notes f•oin the Design Standards Manual, or from the Expedited Review Process lists. 2. Please provide dimensioned typical sections referenced to each street or alley. 3. Signs must be provided for each street intersection: stop signs and street name signs. Speed limit signs should be on each street. 4. The waivers for 12% grade on Whispering Hollow are supported The waiver for a I2% grade can be supported on Verona Court ifparking is removed along this section of road 5. The sag curve 017 Verona Court does not meet minimum standards. 6 The sag curve on Whispering Hollow does not meet minimum standards. 7. On Whispering Hollow the road vertical curvature needs to transition into a negative 2% grade off Rolkin Road S. Please show cross- drains and underdrains where required per VDOT standards on the plan and profile. C. Stormwater Management and Mitigation Plan: (WP0200400011) An amended stormwater management plan was submitted on May 22. Comments will be forth coming. Rev. 1: The stormwater plan amendment has been approved, and the updated igfortnation and grading should appear on this plan. D. Erosion Control Plan: An erosion control plan was not included with this submittal. Rev. l: rn1 erosion control plan has not been received 1fi1 III l COUNTY OF ALBEMARLE Department of Community Development 401 McIntire Road, Room 227 Charlottesville, Virginia 22902 -4596 Phone (434) 296 -5832 Project: The Pavilions at Pantops Phase 1 Plan preparer: The Engineering Groupe Inc. (fax (434) 973 -4584) Owner or rep.: North Pantops Townhouses LLC (fax (434) 296 -3510) Southern Development (fax 245 -0895) Plan received date: 02 May 2006 Rev.]: 15 Nov 2006 Rev.2: 19 March 2007 Date of comments: 05 July 2006 Rev. 1: 3 Jan 2006 Rev.2. 24 March 2007 Reviewer: Mark Chambers Rev.]: Glenn Brooks Rev. 2: Max Greene Fax (434) 972 -4126 The final site plan for "The Pavilions at Pantops Phase I" submitted 19 April 2007 have received engineering review. VDOT has approved the site plan as submitted. Several previous engineering comments do not appear adequately addressed, they are in bold italics below. The E &SC plan package has been received separately and will be reviewed for State and local compliance. Bond amounts will be compiled after all departments and agencies have submitted notice of approval. A. Final site plan (SDP200600043) I . The final set of drawings must have a signed and dated professional seal (18- 32.6.1). Rev.1: comment addressed. 2. Please provide typical sections for proposed stormwater conveyance channels and incorporate the channels into proposed topography on the plan view drawings (18- 32.6.6.d.1). O Rev. l: comment not addressed. Rev. 2: comment addressed. 3. Please provide a drainage sunvnary table (18- 32.6.6.d.1 &2, DSM- 909.1.B.D). Rev. I. comment addressed. 4. Please dimension and label storm structures on the plan view drawing i.e. pipe length, diameter, material, inlet type and rim or top elevation (18- 32.6.6.d.3, DSM- 909.1.B.2 4 &7). Rev. ]. comment addressed. 5. Please provide a drainage easement over storm system P4 through P 1 where it crosses private property. k' Rev.I. commientpartially addressed. A deed and easement will have to he recorded 1n °ioi to or with approval offinal plats. Rev. 2: comment addressed. 6. Please provide scour protection at the end of all pipe and channel outlets (DSM- 909.1.B.3, 505.C.6, 505.D.13). 3( Rev. I. comment partially adch Please provide outlet protection dimensions and specs Albemarle County Engineering review comments Page 2 of 4 Per outlet velocities. Rev.2: comment adch- cssed. 7. Please extend all pipe outlets to the bottom of slopes or provide an adequate channel to the bottom of slopes [DSM- 803.1.0 and 505.0 (4)]. XRev. l: comment not addressed. ti Rev. 2: continent addressed. 8. Please specify VDOT inlet shaping (IS -1) or provide manhole protection everywhere flow drop is greater than 4' in manhole structures (DSM- 505.D.9). Rev. l: comment addressed. 9 Please provide safety slabs for manholes greater than 10' deep (DSM- 505.D.9). Rev. l: comment addressed. 10. For inlets in a sump condition, please provide capacity computations using I value of 6.5 in/hr (DSM 505.G.1). Rev. l: comment addressed. 11. Please provide capacity and velocity computations for proposed channels (DSM 505.C.1). Rev. 1: continent not addresse(l vRev.2: comment addressed. 12. Pipe velocity for design flow must be less the 10 fps (DSM- 505.E.7). Rev. l: please disregard. Outlet velocities must he designed per outlet protection. 13. Please review your pipe comps, in some instances flow accumulation (ACC "Q ") is not adding up. Rev. 1: Pipe comps are in need oJfrevision. Please ensure till pipes are within open channel jlotir capacities. Rev. 2: comment addressed. 14. Please provide comps for the existing storm system down stream of proposed structure 45 to demonstrate adequacy of the existing system for the added flow. NRev. l: as for item 13. Rev. 2. continent ad& 15. Please review your inlet comps, bypass from one inlet must be intercepted by another inlet. An inlet in a sump cannot have bypass to an outlet as indicated in the comps (see inlet 40 bypass target is structure 39 which is an outlet), Inlets in a sump condition like 40 must pass the flow from a "check storm" with an I value of 6.5 without overtopping the curb (see comment #9). [DSM- 505.G.1 I Rev. l: comment addressed. 16. The following places need stormwater infrastructure to convey runoff: a. East end of Wispering Hollow Lane; b. The turn around at the end of Montessori Terrace; c. The Corner of the parking lot in front of lot 161; Od- Please pipe the runoff frorn the parking area and travel way behind units 143 — 148; e. The existing pipe outletting beside lot 1. Rev. l: comment d is not addressed. Rev.2: comment "d" not adequately addressed, County policy requires yard drains after the 3 " lot of continuous drainage across proposed private property. Grading was suggested during the last meeting to alleviate this concern, but was not shown. 17. The parking island in front of lot 205 doesn't provide for stormwater to pass through at the curb line. t Rev. l: comment addressed. S. Please address the unusual curb configurations along Verona Drive and Rolkin Road where Albemarle County Engineering review comments Page 3 of 4 the curb tails out into the adjacent parcels. Rev. l: The splitter island,fr °orrn the roundabout should be continued . fin- at least 50', with a break f n pedestrian access. Rev. 2: comment addressed. 19. Please provide curb and gutter along the south end of Verona Court. Rev. l: comment adth °cssed. 20. Guardrail is required at the end of Whispering Hollow Lane to prevent vehicles from going over the retaining wall. Oev. l: connnent partially addressed by note. Please revise the grading to allow adequate space, and show guardrail. Rev?: connnent addressed. 21. Please remove the curb separating the perpendicular parking from the street on the "Typical Detail- Private Road with Parking" (sheet 3). Pavement design and other road requirements will be reviewed with the road plan. ti Rev. l: connnent adthessed. 2 Please show the sanitary laterals and ensure they are covered by an appropriate easement. Rev. l: connnent addressed. 23. Where public side walks cross private lots they need to be in access easements. Rev. 1: comment addressed. 24. Please extend the public side walk in front of, and, add a lead walk to, unit 103. Rev. l: connnent addressed. 25. Access isles, parking stalls alleys and roads exceed the maximum 10% gradient in the following areas: (i) Behind units 52 -63; (ii) Wispering Hollow Lane near lot 149; (iii) Alley off corner of lot 17; (iv) Alley north of lot 57. Please design these areas to a maximum gradient of 10% (18- 4.12.17.a, policy). X Rev. ]:see road plans conan nts. N Rev. 2: comment addressed. 26. Please provide a turn around for the alley behind lot 29 [DSM -604.13 (4)]. 4 Rev. 1: connnent addressed. 27. Parking areas and access isles do not meet the minimum dimensions behind lots 59 -63, 140- 142 and 143 -148. Please correct this condition (18 4.12.16.a.b &c, DSM 602.1). Rev. 1: conment addres's'ed. 28. Please review the proposed grading and make corrections, for example, areas where proposed contours do not tie into anything (lot 107), where proposed contours tie into homes above first floor elevation (lot 2), unusual parking lot grade on Verona Court in front of lot 211, grade bust behind lots 30 -32. Rev. l: connnent addressed. B. Road and drainage plans: Road plans were not provided with this submittal. Drainage computations were reviewed with the site plan. Rev.]: Road plans_ for private streets and alleys were included with the site plan revision, and the following comments are provided. 1. Please use the latest general notes, f •onn the Design Standards Mamunl, or, fi•orn the Expedited Review Process lists. Rev. 2: connnent addressed. 2. Please provide dimensioned tvpical Sections referenced to each street or alley. Rev. 2: comment addressed. 3. Signs must be provided each street intersection: stop signs and street name signs. Speed 1a >HCINP COUNTY OF ALBEMARLE Department of Community Development 401 McIntire Road, Room 227 Charlottesville, Virginia 22902 -4596 Phone (434) 296 -5832 Fax (434) 972 -4012 April 4, 2007 Justin Shimp The Engineering Groupe, Inc. 2148 Berkinar Drive Charlottesville, VA 22901 RE: ARB- 2006 -121: Pavilions at Pantops, Phase 1 : Final Review of a Site Development Plan Tax Map 078, Parcel 12) Dear Mr. Shimp: I have reviewed your revised submittal (Site plan sheets 1 -38 with revision date of 3/28/07) for the above - referenced project. Outstanding conditions of ARB approval are as follows: 1. Shift the London Plane tree out of the easement west of townhouse # 1. (Your memo indicated that the tree was shitted, but our records show that it has not moved. I have attached a copy of your plan with the tree highlighted.) 2. Revise the covenants to include a clause stating that the Home Owner's Association will ensure that no materials and /or colors other than those approved by the Albemarle County Architectural Review Board shall be used for this project. 3. The elevations for townhomes 29 and 30 through 32 shall not be blank. Provide elevations for review. Please provide: 1. Two copies of revised drawings addressing each of these conditions. Include updated ARB revision dates on each drawing. 2. A memo indicating how each condition has been satisfied. If changes other than those requested have been made, identify those changes in the memo also. 3. The attached "Revised Application Submittal" form. This form must be returned with your revisions to ensure proper tracking and distribution. When staff s review of this information indicates that all conditions of approval have been met, a Certificate of Appropriateness may be issued. If you have any questions, please do not hesitate to contact me. Sincerely, Margaret Maliszewski Principal Planner cc: ARB -06 -121 Summer Frederick t;)p 2_0D r t , Service Auth4ri Mr. Michael Myers, P.E. The Engineering Groupe 2148 Berkmar Drive Charlottesville, Virginia 22901 Re: Pavilions at Pantops Phase 1 Dear Mr. Myers. September 19, 2007 The plan, entitled "Pavilions at Pantops Phase 1" dated April 17, 2006, last revised July 31, 2007 is hereby approved for construction. One set of the approved plan is enclosed for your records. Any previously approved plans are voided with this approval. This approval is for basic compliance with the General Water & Sewer Construction Specifications of the Albemarle County Service Authority (ACSA) and does not relieve the contractor from responsibility for his work as it relates to the plan and specifications. The ACSA requires that a copy of the approved construction plan be on the job site. The contractor is responsible for marking up a copy of the approved construction plan, showing as -built information and providing this data to your client at the completion of utility installation. The final as -built plan shall be submitted in a format of one paper copy and one mylar copy. A preconstruction conference shall be scheduled with the project manager to ensure coordination and answer any questions. This will be a short meeting to review the project, materials, test methods and schedule, in order to expedite construction. Please have the proper party call me at 977 -4511 to schedule the meeting. This approval is valid for a period of 18 months from this date. If construction is not in progress at the end of this time period, the approval shall be void. The pressure for water may be less than 30 psi at some meter locations. If you have any questions, or if we can be of assistance, please give us a call at (434) 977 -4511. JML-cc: Charles Armstrong State Health Department Planning Department Bldg Codes & Zoning Services Soil Erosion Inspector 050601 PavilionsMyersLV091907 Sincerely, Jeremy M. Lynn, P.E. Senior Civil Engineer 168 Spotnap Road • Charlottesville, VA 22911 • Tel (434) 977-4511 • Fax (434) 979 -0698 www.serviceauthority.org RIVANNA WATER SEWER AUTHORITY 695 M C;ORES CREEK LA NE .CHAR! 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