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Home My WebLink AboutWPO201400069 Correspondence 2014-09-05 `Wrr/ Max Greene From: Bill Fritz Sent: Friday, September 05, 2014 2:38 PM To: Max Greene; David Benish; Francis MacCall Subject: RE: North and South Rivanna WTP Improvements Short version— No site plan is needed for either project. Long version- The project proposed with WPO 201400069 does not require a site plan. The reason is because there has never been a site plan on this property and the proposed building does not trigger the need for a site plan. The project proposed with WPO 201400073 does not require a site plan. The reason is because there has never been a site plan on this property and the proposed building does not trigger the need for a site plan. CountyView does indicate a site plan was submitted on this property,SDP198500009. I reviewed that file and found two separate letters making it clear that the development proposed did not trigger the need for a site plan. No action was ever taken on the site plan so there is nothing that needs to be amended. Best thing— Great question Max and thanks for bringing it up. William D. Fritz,AICP Chief of Special Projects 434-296-5823 ext. 3242 From: Max Greene Sent: Friday, September 05, 2014 10:37 AM To: David Benish; Bill Fritz; Francis MacCall Subject: North and South Rivanna WTP Improvements Gentlemen, I've 2 water Protection plans for the North and South Rivanna Water Treatment Plant Improvements and was wondering if they are in need of a site plan for these projects. The WPO#s are WPO201400069 and WPO201400073 on parcels 032E00000001A0 and 045000000068B0 respectively. The y are adding builds and structures to their sites. Thanks, Max Max Greene Albemarle County 401 McIntire rd. Charlottesville,Va.22902 434-296-5832 ext.3283 1 October 2, 2014 Mr. Max Greene County of Albemarle Department of Planning and Community Development 401 McIntire Road Charlottesville, VA 22902-4596 Re: E&S Plan Stormwater Management Plan North Rivanna WTP Dear Mr. Greene: wFti -i0/ - 00061 The Rivanna Water and Sewer Authority is proposing upgrades to the North Rivanna Water Treatment Plant. As such, we offer for resubmittal an erosion and sediment control plan and a stormwater management plan for the North Rivanna Water Treatment Plant (WTP) additions. The improvements of this amendment include the construction of a new granular activated carbon (GAC) facility. In addition to the proposed facility, improvements to existing roadway and sidewalk will be included in this project. Minor grading will also take place, but for the most part the new GAC facility and associated roadway will be constructed closely to existing grade. Please find attached two (2) copies of drawings illustrating the additional work to the North Rivanna WTP, two (2) copies of a descriptive Erosion and Sedimentation Control and Stormwater Management Plan, a Virginia Stormwater Management Program (VSMP) application, and an associated $150 variance request check. Please do not hesitate to contact me should you require any additional information or have any questions. Sincerely, HAZEN AND SAWYER, P.C. Bret T. Edwards, PE Principal Engineer yos/ v„ri October 1, 2014 County of Albemarle Department of Planning and Community Development 401 McIntire Road Charlottesville, VA 22902-4596 Re: WPO Plan Submittal North Rivanna WTP Upgrades Request for Modified Mud Trap Variance Mr. Max Greene: 1,V1�0- 201k '00°61 Variance Request The Rivanna Water and Sewer Authority(RWSA) is planning water treatment(Granular Activated Carbon (GAC)) improvements at the North Rivanna Water Treatment Plant(WTP). This includes the construction of a GAC building, associated roadway, and stormwater improvements. Limits of disturbance is 0.80 acres. During construction, stormwater flows to two different locations on the western part of the site, each area capturing 0,15 acres and 0.50 acres.As a result of the relatively small drainage of the project(< 1 acre), a sediment trap as defined in the Virginia Erosion and Sedimentation Control Handbook would be considered too restrictive for this proposed work, as excess grading would be required. Any grading for a temporary sediment trap would be within the WPO 100' buffer due to its close proximity to the site. To reduce disturbance within the buffer and overall disturbance for the project two modified mud traps are proposed in lieu of a temporary sediment trap. The mud traps have been designed to specifications provided by Albemarle County for drainage areas less than one acre, and are therefore considered adequate for perimeter sediment control for this proposed work. With this understanding, the Rivanna Water and Sewer Authority would therefore like to request a variance for this project, citing Chapter 17, Section 407 of the Albemarle County Code, which states: "The administrator may waive or modify any applicable requirements of the VESCP that he deems to be inappropriate or too restrictive for the site conditions, by granting a variance in conjunction with his review of the erosion and sediment control plan." Thank you for your consideration in this matter. Sincerely, HAZEN AND SAWYER, P.C. Bret T. Edwards, PE Principal Engineer October 1, 2014 County of Albemarle Department of Planning and Community Development 401 McIntire Road Charlottesville, VA 22902-4596 Re: WPO Plan Submittal North Rivanna WTP Upgrades Steep Slopes Waiver Mr. Max Greene: Wp 0-20/I ' 0006' Waiver Request The Rivanna Water and Sewer Authority (RWSA) is planning water treatment(Granular Activated Carbon (GAC)) improvements at the North Rivanna Water Treatment Plant(WTP). In addition to a proposed roadway and building, project improvements call for installation of a 12" Backwash Supply line within the preserved steep slopes of Albemarle County. The backwash supply line will provide water to backwash the GAC filter vessels by removing trapped particles and cleaning the filter media. The backwashing process serves as a maintenance process so that filter media can be reused and is an essential process to keeping the water treatment facility functional. Due to the plant's close proximity to the Rivanna River, the property is surrounded by Albemarle County steep slopes. Installation of the proposed 12 water line will require pipe trenching though the county's preserved steep slopes to tie into an existing water line currently residing inside the preserved slopes. In an effort to minimize the temporary impact of the steep slopes the pipe will be installed straight through the protected area with no bends. Once the pipe is installed existing grade will be restored to its original condition to ensure that post construction stormwater run-off impacts will remain unchanged. Erosion control measures including permanent slope matting will be installed to prevent the risk of erosion within the preserved slopes and are shown on sheet C3301. With this understanding, the Rivanna Water and Sewer Authority would therefore like to request a preserved slopes waiver for this project, citing Chapter 18, Section 4.2.5 (a) of the Albemarle County Code which states: "The commission may grant a modification or waiver if it finds that the modification or waiver would not be detrimental to the public health, safety or welfare, to the orderly development of the area, or to adjacent properties; would not be contrary to sound engineering practices; and at least one of the following: a. Strict application of the requirements of section 4.2 would not forward the purposes of this chapter or otherwise serve the public health, safety or welfare; b. Alternatives proposed by the developer or subdivider would satisfy the intent and purposes of section 4.2 to at least an equivalent degree; c. Due to the property's unusual size, topography, shape, location or other unusual conditions, excluding the proprietary interest of the developer or subdivider, The proposed improvements meet all three requirements for submitting a waiver in the following manner: (1) The modification or waiver would not be detrimental to the public health, safety or welfare to the orderly development of the area, or to adjacent properties: An erosion and sedimentation control plan has been submitted for county approval, to ensure compliance with state regulations protecting public health, safety, and welfare, and protection of adjacent properties. The proposed work within the preserved steep slopes will not prevent future orderly development, as the water line is necessary for current regulations. (2) Strict application of the requirements of section 4.2 would not forward the purposes of this chapter or otherwise serve the public health,safety or welfare: Proposed disturbance in the preserved steep slopes region will not affect public health, welfare, or safety. Thank you for your consideration in this matter. Sincerely, HAZEN AND SAWYER, P.C. Bret T. Edwards, PE Principal Engineer