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HomeMy WebLinkAbout20091070 Ver 1_Email_20100222RE: R2612A RE: R2612A Euliss, Amy Sent: Monday, February 22, 2010 12:38 PM To: Carrillo, Sonia Page 1 of 6 OR-Io7o Could you update BIMS to reflect that you received the additional information below? Its showing the project's on hold. I can also do it, but I wanted to make sure you got the info first. I'll probably try to issue this week. Also, do you assign the IP number in BIMS? I've only done one IP, and I don't remember how I got that number. Thanks. Amy From: Euliss, Amy Sent: Friday, February 19, 2010 1:02 PM To: Carrillo, Sonia Subject: FW: R2612A Will you please add the attachments and the email below to 09-1070? Thanks. Amy From: Pflaum, James R Sent: Friday, February 12, 2010 2:01 PM To: Euliss, Amy Cc: Williams, Andrew E SAW Subject: RE: R2612A Amy, In response to your comments from site 3 stream 4: Attached are plan sheet updates to permit drawing sheets 10 of 30, 11 of 30, 15 of 30, and 16 of 30. These are all in reference to site site 3 and the ditch rerouting stream 4 (roadway storm water). For the ditch at the outlet of the proposed culvert, coir fiber matting is not an adequate reinforcement option. The velocity in this ditch is approximately 10 ft/s. Class B riprap(at a minimum)is required. Maximum permissible velocity for ditch flow is approximately 4 ft/s. Anything above this rate has the potential to produce erosion. If further documentation is needed as proof of the necessary ditch reinforcement, the Erosion Control Manual produced by the NC Erosion Control Commission in conjunction with the Extension Service at NC State can be used as a reference. In response to your comment from site 5 wetland 1: Detail 15 liner will be rip rap, see comment above for rip rap justification. In response to your comments at Site 5 wetland 1: See comment above for rip rap justification. https://mail.nc.gov/owa/?ae=ltem&t=IPM.Note&id=RgAAAADMSzLcd9 W2TJH14°/u2bmA%2f... 2/22/2010 RE: R2612A Please give me a call if you have questions. Thanks James Pflaum NC Department of Transportation PDEA Environmental Resource Center 4701 Atlantic Ave Raleigh, NC 27604 919-431-6527 1598 MSC Raleigh, NC 27699 Page 2 of 6 From: Euliss, Amy Sent: Monday, February 01, 2010 12:03 PM To: Pflaum, James R Cc: Williams, Andrew E SAW Subject: RE: R2612A James, Please see my response to the answers, as well as additional question concerns. Thanks. Amy Site 1: Stream 5: 1. Is the stream intermittent or perennial? Table 1 says perennial, page 5 of the permit app says intermittent, unimportant. Please determine the appropriate classification for this stream. Miss labeled on Table 1, Stream 5 is intermittent, non-mitigable. OK Is bank stabilization around the outlet of the pipe? Is it included in the 145 linear feet? Please remember if these impacts equal or exceed 150 linear feet, then mitigation will be required. Bank stabilization was not included on Stream 5 - due to the non-mitigable status. OK Wetland 6: 1. Stream 5 appears to be the source of hydrology for Wetland 6. You are removing the flowing stream from the wetlands, thus removing the hydrology. Please determine the source of the hydrology. If it is the stream, the wetland should be a total take. This question was posed by Cathy Mathews in the 4C meeting, but it does not show up on the minutes. The stream is not the only source of hydrology for this portion of wetland 6. The pond, drainage from the hill to the east, and drainage from the proposed US 421 (storm water pipe at Y1 +60.00) will provide hydrology. OK hups://mail.nc.gov/owa/?ae=ltem&t=l PM.Note&id=RgAAAADMSzLcd9 W2TJH14%2bmA%2f... 2/22/2010 RE: R2612A Page 3 of 6 Site 3: Stream 4: 1. Stream 4 is being filled. The source of the stream is being piped and outlets perpendicular to the road. At the outlet of the pipe, the plans show no connection to the existing channel. You need to create a new channel that connects the stream from the pipe outlet to the pond. This new channel should not be lined with rip rap unless velocities warrant rip rap. If rip rap is proposed, please provide justification. No rock should be placed in channel bottom. Stream 4 has been ruled non-mitigable, hydrology source is storm water from US 421. The pipe that reroutes stream 4 (structure 17) is shown oddly. It will connect to a lateral V ditch (detail 1) which will connect to a tail V ditch in detail 11, both ditches are lined with rip-rap. Rip-rap is warranted due to erosive velocities and steep topography (see topo lines permit drawings sheet 15 of 30). These ditches drain to a natural ephemeral feature which discharges into the pond. Please update the plans to reflect the connections. Please reference the methods used to determine when rip rap is necessary. For example, is it a requirement of the Sediment and Erosion control manual, or some other source? I don't need the exact calculations, but I do need you to reference how you came to the conclusion that rip rap is warranted. Site 4: Wetland 5: 1. Excavation total shows <0.01 for the total. Please clarify if this is <0.005 or equal to or > than 0.005. If > or equal to .005, then please add .01 to the mitigation total. Impact is less than 0.005. OK Site 5: Wetland 1: 1. It appears as though no channel flows through the wetland. Please state how the wetland will be connected to the pipe. Will a channel be created to direct flow to the inlet of the culvert? The wetland is a drained pond. Flow will be diverted into the culvert by breaching the dam at the location shown and use of a base ditch, detail 15. What type of liner does detail 15 have? If its rip rap, then please reference the methods used to determine when rip rap is necessary. For example, is it a requirement of the Sediment and Erosion control manual, or some other source? I don't need the exact calculations, but I do need you to reference how you came to the conclusion that rip rap is warranted. 2. At the channel outlet, there is class 1 rip rap and the plans refer to detail 17. 1 don't see a detail 17. Please provide. PDF with detail 17 is attached. Please reference the methods used to determine when rip rap is necessary. For example, is it a requirement of the Sediment and Erosion control manual, or some other source? I don't need the exact calculations, but I do need you to reference how you came to the conclusion that rip rap is warranted. https://mail.nc.gov/owa/?ae=Item&t=IPM.Note&id=RgAAAA DMSzLcd9 W2TJHI4%2bmA°/u2f... 2/22/2010 RE: R2612A Page 4 of 6 3. Beyond the outlet, there is a constructed channel to reconnect with the original stream. It refers to detail 12. Detail 12 shows rip rap in the stream bed. Please remove the rip rap from the stream bed, or provide justification for it to remain in the stream bottom. Rip-rap is warranted due to erosive velocities and steep topography (see topography permit drawings sheet 23 of 30). Please reference the methods used to determine when rip rap is necessary. For example, is it a requirement of the Sediment and Erosion control manual, or some other source? I don't need the exact calculations, but I do need you to reference how you came to the conclusion that rip rap is warranted. 4. Project commitments from Hydraulics 4B show for 3, 1'sills in the culvert place @200' apart. Please clarify if they are to be utilized, or provide justification for why they have been removed. One foot sills are being used in the culvert at site 5. OK As an additional note, for all channels with rip rap placed in the channel bottom, there will be a condition on the permit stating that rip rap shall be keyed into to the stream bed and banks, in order to not impede aquatic passage. Having this stamped on the plans would increase the likelihood of compliance in the field. Amy From: Pfaum, James R Sent: Wednesday, January 13, 2010 1:47 PM To: Euliss, Amy; andrew.e.Williams2@usace.army.mil Subject: RE: R2612A Amy - please see comments below each question. James Pfaum NC Department of Transportation PDEA Environmental Resource Center 4701 Atlantic Ave Raleigh, NC 27604 919-431-6527 1598 MSC Raleigh, NC 27699 From: Euliss, Amy Sent: Monday, January 11, 2010 2:54 PM To: Pflaum, James R Cc: andrew.e.williams@usace.army.mil Subject: R2612A https:Hmail.nc.gov/owa/?ae=Item&t=IPM.Note&id=RgAAAADMSzLcd9 W 2TJH14%2bmA%2£.. 2/22/2010 RE: R2612A. James, Page 5 of 6 Here's a list of questions.' My official clock doesn't start until after the public notice closes (1-20-2010). That said, if I don't have these answered by mid-February, I'll have to put the project on hold. Site 1: Stream 5: 1. Is the stream intermittent or perennial? Table 1 says perennial, page 5 of the permit app says intermittent, unimportant. Please determine the appropriate classification for this stream. Miss labeled on Table 1, Stream 5 is intermittent, non-mitigable. 2. Is bank stabilization around the outlet of the pipe? Is it included in the 145 linear feet? Please remember if these impacts equal or exceed 150 linear feet, then mitigation will be required. Bank stabilization was not included on Stream 5 - due to the non-mitigable status. Wetland 6: 1. Stream 5 appears to be the source of hydrology for Wetland 6. You are removing the flowing stream from the wetlands, thus removing the hydrology. Please determine the source of the hydrology. If it is the stream, the wetland should be a total take. This question was posed by Cathy Mathews in the 4C meeting, but it does not show up on the minutes. The stream is not the only source of hydrology for this portion of wetland 6. The pond, drainage from the hill to the east, and drainage from the proposed US 421 (storm water pipe at Y1 +60.00) will provide hydrology. Site 3: Stream 4: 1. Stream 4 is being filled. The source of the stream is being piped and outlets perpendicular to the road. At the outlet of the pipe, the plans show no connection to the existing channel. You need to create a new channel that connects the stream from the pipe outlet to the pond. This new channel should not be lined with rip rap unless velocities warrant rip rap. If rip rap is proposed, please provide justification. No rock should be placed in channel bottom. Stream 4 has been ruled non-mitigable, hydrology source is storm water from US 421. The pipe that reroutes stream 4 (structure 17) is shown oddly. It will connect to a lateral V ditch (detail 1) which will connect to a tail V ditch in detail 11, both ditches are lined with rip-rap. Rip-rap is warranted due to erosive velocities and steep topography (see topo lines permit drawings sheet 15 of 30). These ditches drain to a natural ephemeral feature . which discharges into the pond. Site 4: Wetland 5: 1. Excavation total shows <0.01 for the total. Please clarify if this is <0.005 or equal to or > than 0.005. If > or equal to .005, then please add .01 to the mitigation total. Impact is less than 0.005. Site 5: Wetland 1: 1. It appears as though no channel flows through the wetland. Please state how the wetland will be connected to https://mail.nc.gov/owa/?ae=Item&t=IPM.Note&id=RgAAAADMSzLcd9 W2TJHI4%2bmA%2f... 2/22/2010 RE: R2612A Page 6 of 6 the pipe. Will a channel be created to direct flow to the inlet of the culvert? The wetland is a drained pond. Flow will be diverted into the culvert by breaching the dam at the location shown and use of a base ditch, detail 15. 2. At the channel outlet, there is class 1 rip rap and the plans refer to detail 17. 1 don't see a detail 17. Please provide. PDF with detail 17 is attached. Beyond the outlet, there is a constructed channel to reconnect with the original stream. It refers to detail 12. Detail 12 shows rip rap in the stream bed. Please remove the rip rap from the stream bed, or provide justification for it to remain in the stream bottom. Rip-rap is warranted due to erosive velocities and steep topography (see topography permit drawings sheet 23 of 30). 4. Project commitments from Hydraulics 4B show for 3, 1'sills in the culvert place @200' apart. Please clarify if they are to be utilized, or provide justification for why they have been removed. One foot sills are being used in the culvert at site 5. Thanks, Amy Euliss Please note my new email address: amy.euliss@ncdenr.gov Amy Euliss NC DENR Winston-Salem Regional Office Division of Water Quality, Surface Water Protection 585 Waughtown Street Winston-Salem, NC 27107 Voice: (336) 771-5000 FAX: (336) 771-4630 Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties. https://mail.nc.gov/owa/?ae=ltem&t=IPM.Note&id=RgAAAADMSzLcd9 W2TJHI4%2bmAd/o2f... 2/22/2010