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Home My WebLink AboutWPO201300038 Review Comments Erosion Control Plan 2013-09-17Michelle Roberge From: Michelle Roberge Sent: Tuesday, September 17, 2013 11:53 AM To: 'mbuswell @hazenandsawyer.com' Subject: E3_esc_Rivanna Pump Station & Interceptor Tunnel Hello Matthew, Please consider this as the official approval notice for WPO2013 -38. There is one slight change to the note on sheet C- 10. See attached. Please revise the plans and resubmit 4 signed copies which I will then stamp "approved." Thanks! El E3_esc_Rivanna EngApprovalFactS Pump Station & ... heet.doc - Michelle Michelle Roberge Department of Community Development County of Albemarle, Virginia 401 McIntire Road i Charlottesville, VA 22902 434.296.5832 ext. 3458 �RGICn4' COUNTY OF ALBEMARLE Department of Community Development 401 McIntire Road Charlottesville, Virginia 22902 WPO Plan Review Project: Rivanna Pump Station and Interceptor Tunnel Number: WP02013 -38 Plan Received Date: 28 Aug 2013 Review Date: 17 Sep 2013 Reviewer: Michelle Roberge This is an abbreviated review comment notice. County engineering staff is available every Thursday afternoon to discuss details of review. To schedule, please call your reviewer for an appointment. Erosion & Sediment Control: (Code Chapter 17, Article II) X Adequate Not Adequate Y N X State standards followed, and Design Standards Manual notes and details X Adequate limits and perimeter measures out of work areas X All stages protected adequately X Adequate channels Stormwater Management: (Code Chapter 17, Article 111) M N X Adequate Not Adequate Enough capture and treatment for on -site areas Enough detention storage for on -site areas Sealed hydrologic and hydraulic computations provided - Please note that previous design under WP02008 -79 was approved to allow no treatment for area north of pump station. This current design is mimicking this and therefore I will approve. Please note that for all future projects impervious areas should be treated to the maximum amount possible. - Change note 5 on Sheet C10 to revise portion of note to "...perforations shall contain at least 6 holes." - Contractor shall provide manufacturer's certification. Mitigation: (Code Chapter 17, Article III) Adequate Not Adequate Y N F__T I Buffers and disturbed areas adequately shown Adequate plantings at 2:1, or other mitigation provided N/A This review attempts to encompass the larger compliance questions. County staff does not assume responsibility for any calculation or plan details, and cannot cover the intricacies of every plan submitted. Each plan and calculation must have a professional seal and signature to assume these responsibilities. This plan X Approved (please see attached Approval Fact Sheet) Not Approved is �pF A vt�r�1Q 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: Moores Creek WWTP - Rivanna Pump Station and Interceptor Tunnel Plan preparer: Hazen and Sawyer Owner or rep.: Rivanna Water & Sewer Authority Plan received date: 3 Jun 2013 Date of comments: 1 Jul 2013 Reviewer: Michelle Roberge A. Erosion and Sediment Control Plan (WP0201300038) 1. The SWM management application and fee have not been submitted at this time. This review is for erosion and sediment control only. 2. Since it is not clear if the tunnel is being proposed at this time, also clarify if the stockpiles are for both the pump station and the interceptor tunnel, or the pump station only. This information is necessary to determine if the proposed erosion control measures around the stockpiles are adequate. 3. Any stockpile taken offsite will require a permit. 4. The erosion control measure for the stockpiles shall wrap around entire stockpile location. Please show on sheet C5 and C6. 5. On C5 and C6, all construction entrances shall be, at a minimum, 12'x 70'. [VESH 3.021 6. The access road, from note 7 on sheet C6, shall show a CRS. The slope shall not exceed 10 %. Roadbeds shall be at least 14' wide for one way and 20' for two way. [VESH 3.031 7. Please place the TS and DC symbols on sheet C5. 8. Stockpile #1 is within the floodplain. Please relocate outside of floodplain. [Section 30.3.04 - Prohibited Uses] 9. On sheet C5, I recommend placing note #19 within the limits of Stockpile # 2, so it is clear this area will only be used after the completion of the digester project. 10. Is the proposed gravel entrance for RWSA personnel temporary or permanent? 11. On the SW corner of sheet C6, I recommend revising the silt fence to follow the 316 & 318 contour. Silt fences do not work well on slopes. Sincerely, Michelle Roberge �RGICn4' COUNTY OF ALBEMARLE Department of Community Development 401 McIntire Road Charlottesville, Virginia 22902 WPO Plan Review Project: Rivanna Pump Station and Interceptor Tunnel Number: WP02013 -38 Plan Received Date: 21 Jan 2014 Review Date: 27 Jan 2014 Reviewer: Michelle Roberge This is an abbreviated review comment notice. County engineering staff is available every Thursday afternoon to discuss details of review. To schedule, please call your reviewer for an appointment. Erosion & Sediment Control: (Code Chapter 17, Article II) Adequate X Not Adequate Y N X State standards followed, and Design Standards Manual notes and details X Adequate limits and perimeter measures out of work areas X All stages protected adequately X Adequate channels - Please show tunnel profile within Albemarle County limits only. (Gray out section within Charlottesville limits). Label the station at end of County limits. - Calculate amount of borrow from tunnel and pump station. -Show proposed grades for stockpile areas and label cf or cy of stockpile in each designated stockpiling area. Note max grade for slope is 2:1. (We need to verify if stockpile locations are adequate) -It appears a staging area for tunnel boring is required near the pump station. Show phasing since pump station excavation may not be possible until after the tunnel is drilled. Stormwater Management: (Code Chapter 17, Article III) M N Adequate X Not Adequate Enough capture and treatment for on -site areas - Please note that previous design under WP02008 -79 was approved to allow no treatment for area north of pump station. This current design is mimicking this. Please note that for all future projects impervious areas should be treated to the maximum amount possible. Enough detention storage for on -site areas Sealed hydrologic and hydraulic computations provided - Certain pipes for storm drains changed. Provide updated calcs, sealed and signed. - Change note 5 on Sheet C10 to revise portion of note to "...perforations shall contain at least 6 holes." - Contractor shall provide manufacturer's certification. Mitigation: (Code Chapter 17, Article I1I) Adequate Not Adequate Y N Buffers and disturbed areas adequately shown Adequate plantings at 2:1, or other mitigation provided N/A This review attempts to encompass the larger compliance questions. County staff does not assume responsibility for any calculation or plan details, and cannot cover the intricacies of every plan submitted. Each plan and calculation must have a professional seal and signature to assume these responsibilities. This plan Approved (please see attached Approval Fact Sheet) X Not Approved is �RGICn4' COUNTY OF ALBEMARLE Department of Community Development 401 McIntire Road Charlottesville, Virginia 22902 WPO Plan Review Project: Rivanna Pump Station and Interceptor Tunnel Number: WP02013 -38 Plan Received Date: 3 Feb 2014 Review Date: 10 Feb 2014 Reviewer: Michelle Roberge This is an abbreviated review comment notice. County engineering staff is available every Thursday afternoon to discuss details of review. To schedule, please call your reviewer for an appointment. Erosion & Sediment Control: (Code Chapter 17, Article II) lip Adequate X Not Adequate X State standards followed, and Design Standards Manual notes and details X Adequate limits and perimeter measures out of work areas X All stages protected adequately X Adequate channels Please show on a plan the waste /disposal area for the remainder of excavated material. Stormwater Management: (Code Chapter 17, Article III) M 'l X Adequate Not Adequate Enough capture and treatment for on -site areas - Please note that previous design under WP02008 -79 was approved to allow no treatment for area north of pump station. This current design is mimicking this. Please note that for all future projects impervious areas should be treated to the maximum amount possible. Enough detention storage for on -site areas Sealed hydrologic and hydraulic computations provided Mitigation: (Code Chapter 17, Article 111) Adequate Not Adequate Y N Buffers and disturbed areas adequately shown Adequate plantings at 2:1, or other mitigation provided N/A This review attempts to encompass the larger compliance questions. County staff does not assume responsibility for any calculation or plan details, and cannot cover the intricacies of every plan submitted. Each plan and calculation must have a professional seal and signature to assume these responsibilities. This plan Approved (please see attached Approval Fact Sheet) X Not Approved is Michelle Roberge From: Michelle Roberge Sent: Tuesday, September 17, 2013 11:53 AM To: 'mbuswell @hazenandsawyer.com' Subject: E3_esc_Rivanna Pump Station & Interceptor Tunnel Hello Matthew, Please consider this as the official approval notice for WPO2013 -38. There is one slight change to the note on sheet C- 10. See attached. Please revise the plans and resubmit 4 signed copies which I will then stamp "approved." Thanks! El E3_esc_Rivanna EngApprovalFactS Pump Station & ... heet.doc - Michelle Michelle Roberge Department of Community Development County of Albemarle, Virginia 401 McIntire Road i Charlottesville, VA 22902 434.296.5832 ext. 3458 �RGICn4' COUNTY OF ALBEMARLE Department of Community Development 401 McIntire Road Charlottesville, Virginia 22902 WPO Plan Review Project: Rivanna Pump Station and Interceptor Tunnel Number: WP02013 -38 Plan Received Date: 28 Aug 2013 Review Date: 17 Sep 2013 Reviewer: Michelle Roberge This is an abbreviated review comment notice. County engineering staff is available every Thursday afternoon to discuss details of review. To schedule, please call your reviewer for an appointment. Erosion & Sediment Control: (Code Chapter 17, Article II) X Adequate Not Adequate Y N X State standards followed, and Design Standards Manual notes and details X Adequate limits and perimeter measures out of work areas X All stages protected adequately X Adequate channels Stormwater Management: (Code Chapter 17, Article 111) M N X Adequate Not Adequate Enough capture and treatment for on -site areas Enough detention storage for on -site areas Sealed hydrologic and hydraulic computations provided - Please note that previous design under WP02008 -79 was approved to allow no treatment for area north of pump station. This current design is mimicking this and therefore I will approve. Please note that for all future projects impervious areas should be treated to the maximum amount possible. - Change note 5 on Sheet C10 to revise portion of note to "...perforations shall contain at least 6 holes." - Contractor shall provide manufacturer's certification. Mitigation: (Code Chapter 17, Article III) Adequate Not Adequate Y N F__T I Buffers and disturbed areas adequately shown Adequate plantings at 2:1, or other mitigation provided N/A This review attempts to encompass the larger compliance questions. County staff does not assume responsibility for any calculation or plan details, and cannot cover the intricacies of every plan submitted. Each plan and calculation must have a professional seal and signature to assume these responsibilities. This plan X Approved (please see attached Approval Fact Sheet) Not Approved is �RGICn4' COUNTY OF ALBEMARLE Department of Community Development 401 McIntire Road Charlottesville, Virginia 22902 WPO Plan Review Project: Rivanna Pump Station and Interceptor Tunnel Number: WP02013 -38 Plan Received Date: 21 Jan 2014 Review Date: 27 Jan 2014 Reviewer: Michelle Roberge This is an abbreviated review comment notice. County engineering staff is available every Thursday afternoon to discuss details of review. To schedule, please call your reviewer for an appointment. Erosion & Sediment Control: (Code Chapter 17, Article II) Adequate X Not Adequate Y N X State standards followed, and Design Standards Manual notes and details X Adequate limits and perimeter measures out of work areas X All stages protected adequately X Adequate channels - Please show tunnel profile within Albemarle County limits only. (Gray out section within Charlottesville limits). Label the station at end of County limits. - Calculate amount of borrow from tunnel and pump station. -Show proposed grades for stockpile areas and label cf or cy of stockpile in each designated stockpiling area. Note max grade for slope is 2:1. (We need to verify if stockpile locations are adequate) -It appears a staging area for tunnel boring is required near the pump station. Show phasing since pump station excavation may not be possible until after the tunnel is drilled. Stormwater Management: (Code Chapter 17, Article III) M N Adequate X Not Adequate Enough capture and treatment for on -site areas - Please note that previous design under WP02008 -79 was approved to allow no treatment for area north of pump station. This current design is mimicking this. Please note that for all future projects impervious areas should be treated to the maximum amount possible. Enough detention storage for on -site areas Sealed hydrologic and hydraulic computations provided - Certain pipes for storm drains changed. Provide updated calcs, sealed and signed. - Change note 5 on Sheet C10 to revise portion of note to "...perforations shall contain at least 6 holes." - Contractor shall provide manufacturer's certification. Mitigation: (Code Chapter 17, Article I1I) Adequate Not Adequate Y N Buffers and disturbed areas adequately shown Adequate plantings at 2:1, or other mitigation provided N/A This review attempts to encompass the larger compliance questions. County staff does not assume responsibility for any calculation or plan details, and cannot cover the intricacies of every plan submitted. Each plan and calculation must have a professional seal and signature to assume these responsibilities. This plan Approved (please see attached Approval Fact Sheet) X Not Approved is �RGICn4' COUNTY OF ALBEMARLE Department of Community Development 401 McIntire Road Charlottesville, Virginia 22902 WPO Plan Review Project: Rivanna Pump Station and Interceptor Tunnel Number: WP02013 -38 Plan Received Date: 3 Feb 2014 Review Date: 10 Feb 2014 Reviewer: Michelle Roberge This is an abbreviated review comment notice. County engineering staff is available every Thursday afternoon to discuss details of review. To schedule, please call your reviewer for an appointment. Erosion & Sediment Control: (Code Chapter 17, Article II) lip Adequate X Not Adequate X State standards followed, and Design Standards Manual notes and details X Adequate limits and perimeter measures out of work areas X All stages protected adequately X Adequate channels Please show on a plan the waste /disposal area for the remainder of excavated material. Stormwater Management: (Code Chapter 17, Article III) M 'l X Adequate Not Adequate Enough capture and treatment for on -site areas - Please note that previous design under WP02008 -79 was approved to allow no treatment for area north of pump station. This current design is mimicking this. Please note that for all future projects impervious areas should be treated to the maximum amount possible. Enough detention storage for on -site areas Sealed hydrologic and hydraulic computations provided Mitigation: (Code Chapter 17, Article 111) Adequate Not Adequate Y N Buffers and disturbed areas adequately shown Adequate plantings at 2:1, or other mitigation provided N/A This review attempts to encompass the larger compliance questions. County staff does not assume responsibility for any calculation or plan details, and cannot cover the intricacies of every plan submitted. Each plan and calculation must have a professional seal and signature to assume these responsibilities. This plan Approved (please see attached Approval Fact Sheet) X Not Approved is �RGICn4' COUNTY OF ALBEMARLE Department of Community Development 401 McIntire Road Charlottesville, Virginia 22902 WPO Plan Review Project: Rivanna Pump Station and Interceptor Tunnel Number: WP02013 -38 Date: 31 Jul 2013 Reviewer: Michelle Roberge This is an abbreviated review comment notice. County engineering staff is available every Thursday afternoon to discuss details of review. To schedule, please call your reviewer for an appointment. Erosion & Sediment Control: Adequate (Code Chapter 17, Article I1) Not Adequate Y N State standards followed, and Design Standards Manual notes and details Adequate limits and perimeter measures out of work areas All stages protected adequately Adequate channels N/A Stormwater Management: (Code Chapter 17, Article III) Y N Adequate X Not Adequate Enough capture and treatment for on -site areas Enough detention storage for on -site areas Sealed hydrologic and hydraulic computations provided -The pre condition shows 2.32 acres being treated. Post condition shows only 1.78 acres being treated. Please provide treatment for 2.32 acres. -For SWM facility, provide more detail, dimensions, and cross sections of each chamber. Clarify baffle details. - Verify all items from VSMH (3.12A -5 to 3.12A -8) are provided. - Provide manufacturers certification. Mitigation: (Code Chapter 17, Article I1I) Adequate Not Adequate — Provide a mitigation plan Y N Buffers and disturbed areas adequately shown Adequate plantings at 2:1, or other mitigation provided - Disturbance of 100' stream buffer will be allowed per 17- 321.1, but a mitigation plan must be submitted and approved. See Albemarle County Design Manual. This review attempts to encompass the larger compliance questions. County staff does not assume responsibility for any calculation or plan details, and cannot cover the intricacies of every plan submitted. Each plan and calculation must have a professional seal and signature to assume these responsibilities. This plan is Approved (please see attached Approval Fact Sheet) g Not Approved