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HomeMy WebLinkAboutSUB200800287 Review Comments Preliminary Plat 2008-12-12*-&A County of Albemarle Department of Community Development Memorandum To: Summer Frederick, Current Development Project Planner From: Phil Custer, Current Development engineering review Date: 12 December 2008 Subject: Fontana Phase 4C, Section 1 Preliminary Plat (SUB- 2008 - 00287) The preliminary plat for Fontana Phase 4c, Section 1 has been reviewed. Engineering review provides the following comments: 1. The applicant should clarify what exactly this application is. It appears to be a preliminary plat for Sections 1, 2, and 3, but the title says the plan is just for Section 1. 2. A critical slope waiver appears to be necessary. The applicant should provide a request for a waiver to the agent before the next submittal. 3. If this plan is intended to be a preliminary plat for section 2, a curb and gutter waiver is required for Cortina Way and Belluno Lane. The applicant should provide a request for a waiver of these standards to the agent before the next submittal. A waiver of sidewalks is also required for these roads as well. 4. Please remove sheets 8.0 and 8.1 from the set. These erosion and sediment control sheets will not be reviewed with the preliminary plat. The erosion and sediment control plan will be reviewed once a WPO application and fee is submitted. For this project, an application cannot be submitted until all off -site improvements have been completed to the County Engineer's satisfaction. (Proffer #8) 5. Please provide the date of the topographic survey on the plan. The survey does not appear to be accurate. Lots from previous phases, which have been built out, appear to show before - development grades. The grades on Via Florence appear to be from design drawings from a previous plan. Please show accurate topography. 6. The plan is lacking analysis of SWM solutions for quality and quantity of runoff. On the next submittal, please supply the County's Modified Simple spreadsheet for each drainage area. SWM facilities should be sited to capture as much runoff as practicable. All lots should be captured. 7. The grading plan is not adequate. Please address the following items regarding the grading plan: a. The retaining walls are steeper than the maximum allowed grade of 2:1. b. The building sizes are not representative of what will be constructed. After looking at the aerial photographs for the existing Fontana neighborhood, only about 20% have footprints the size shown in the plan. The grading plan should be representative of what the final buildout of the subdivision will be. Please include walkways, house entrances, wider driveways (show side loaded garages if desired), porches, attached garages, and decks on the grading plan for each building site. (Proffer #2A and #2G) c. It does not appear that Proffer #2E has been met. Storm sewers through some of the lots south of Brunello Court are required. For instance, it appears a storm sewer is needed between lots 25 and 26. This grading plan must match exactly what will be constructed. Deviations from the approved grading plan will not be granted by the county. 8. The new pedestrian paths must be Class A Type I according to proffer #5. Please update the detail and the plan to show a path 5ft in width with a section of 2" of asphalt overlayed on 4" of gravel. Current Development Engineering Review Comments Page 2 of 2 Please also note on the detail that the path is not to have a cross slope of greater than 2 %. The path also appears to be placed on grades steeper than 10 %. 9. The path east of lot 12 must be shown in a loft wide easement. This path also appears to violate the 10% maximum grade requirement of a Class A Type I trail. 10. Please dimension the horizontal roadway alignment to check for compliance with VDOT standards. 11. On the landscape plan please show non - grassed, low maintenance groundcover over all slopes steeper than 3:1. File: E1_ppt_PBC_sub200800287.doc