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HomeMy WebLinkAbout20211827 Ver 1_Sediment Loss Email Notification_20231219Baker, Caroline D From: Jeffrey Taylor <jefftaylor@pollutionmonitoring.net> Sent: Tuesday, December 19, 2023 4:56 PM To: Denton, Bill; Summers, Kimberly M; Thomas, Zachary T; Scott Benson (Scott.Benson@ncdenr.gov) Cc: Nick Meagher; Brad Williford Subject: [External] Bexford Subdivision (Fuquay-Varina Jurisdiction) Notification CAUTION: External email. Do not click links or open attachments unless verified. Report suspicious emails with the Report Message button located on your Outlook menu bar on the Home tab. Hi Bill, The purpose of this email is to notify you of the following sediment that discharged from the site at Bexford Subdivision in the Fuquay-Varina Jurisdiction witnessed Monday that impacted the wetlands. Approximately 2.8 inches fell on site in the rain event from rains this weekend. Crews were on site yesterday and today preforming low -impact removal and repairing devices. At SSB 18, the spillway activated and eroded the side of the spillway where the spillway meets the berm, subsequently eroding the fill slope below the basin. A few yards of sediment was displaced into the wetland area below. At the crossing above SSB 20, uphill perimeter slopes eroded due to stormwater flow coming from off site through a Kudzu field, which eroded the slope coming into the site. The soil that was displaced was caught in the large filter berm/scour hole on the upper end of this road crossing over a swale area before the wetland begin. The wetland area starts below this and the stream and buffer is located further below this. Sediment travelled through the culvert pipe and overwhelmed the plunge pool and silt fence/outlet below washing sediment into the wetland area. I estimate 10 inches of sediment directly behind the silt fence and three pockets of sediment 20x30, 30x10, and 300 feet with the bulk of the sediment being just a few inches deep. Also, below SSB 20, the spillway activated washing some sediment past the LOD below. Estimated to be one yard of sediment. It was mostly removed by the time I made it there completed. Crews mobilized immediately to clean up sediment in the wetland areas below using low impact methods. They will remove soils to the change in color with shovels and buckets and will seed any disturbed vegetation with a wetland seed mix. As waters subside, the crews will revisit the area and remove any sediment that may have been underwater. Please let me know if you have any questions, further recommendations, need photos, or wish to meet on site. Thank you, Jeff Taylor Managing Stormwater Compliance Consultant Pollution Monitoring Services 3434 Edwards Mill Road, Suite 112-353 Raleigh, NC 27612 919.602.1297 (office) 919.608.8638 (cell) www.pollutionmonitoring.net yl POLLUTION MONITORING ERViCE NPpES InspacNans and Consulting Baker, Caroline D From: Jeffrey Taylor <jefftaylor@pollutionmonitoring.net> Sent: Monday, October 2, 2023 5:18 PM To: Denton, Bill; Summers, Kimberly M; Thomas, Zachary T; Scott Benson (Scott.Benson@ncdenr.gov) Cc: Nick Meagher; Brad Williford Subject: [External] Bexford Subdivision (Fuquay-Varina Jurisdiction) Notification CAUTION: External email. Do not click links or open attachments unless verified. Report suspicious emails with the Report Message button located on your Outlook menu bar on the Home tab. Hi Bill, The purpose of this email is to notify you of the following sediment discharge from the site at Bexford Subdivision in the Fuquay-Varina Jurisdiction witnessed on Friday. Below future SCM #7, sediment undermined the silt fence and washed a small trail of sediment into the wetlands. The size was approximately 40 ft long by 10 ft wide in the widest pockets and depths ranged from a skim coat to up to 3 in deep in some pockets. It leads to the stream. There is sediment/soil present on the banks of the stream for 50 or so feet below this location. We discovered this on Friday's inspection (9/29) and realized that it must have been missed on our Monday inspection. The contractor will repair the silt fence and remove sediment where possible from the wetland area using low impact methods Please let me know if you have any questions, further recommendations, need photos, or wish to meet on site. Thank you, Jeff Taylor Managing Stormwater Compliance Consultant Pollution Monitoring Services 3434 Edwards Mill Road, Suite 112-353 Raleigh, NC 27612 919.602.1297 (office) 919.608.8638 (cell) www.pollutionmonitoring.net POLLUTION MONITORING SERVICE NFIDES InapacNanm and Concufting Baker, Caroline D From: Jeffrey Taylor <jefftaylor@pollutionmonitoring.net> Sent: Wednesday, September 27, 2023 1:38 PM To: Denton, Bill; Summers, Kimberly M; Thomas, Zachary T; Scott Benson (Scott.Benson@ncdenr.gov) Cc: Nick Meagher; Brad Williford Subject: [External] Bexford Subdivision (Fuquay-Varina Jurisdiction) Notification CAUTION: External email. Do not click links or open attachments unless verified. Report suspicious emails with the Report Message button located on your Outlook menu bar on the Home tab. Hi Bill, The purpose of this email is to notify you of the following sediment discharge from the site at Bexford Subdivision in the Fuquay-Varina Jurisdiction witnessed Monday that impacted the stream below a proposed crossing. A proposed stream crossing was timbered and subsequently partially graded in preparation for the installation of the RCP's. Temporary silt fence and outlets were put in place parallel to the stream as well on the low side of the crossing. The tropical storm rain events this weekend washed water through the crossing area, discharging some sediment into the stream past the limits of disturbance. The silt fence outlet on the low side of the crossing area was relatively in tact but the velocity of the water did push some sediment through that was visible in the stream bends and on the banks. The stream is approximately 2-3 feet wide. Some of the impacted area is still within the limits of disturbance, although there is some visible sediment below this area in the stream. Crews mobilized immediately to clean up sediment in the stream and buffer area below using low impact methods. They will remove soils to the change in color. We estimate that there was no more than a few cubic yards of sediment visible below the point of discharge. As waters subside, the crews will revisit the area and remove any sediment that may have been underwater. Please let me know if you have any questions, further recommendations, need photos, or wish to meet on site. Thank you, Jeff Taylor Managing Stormwater Compliance Consultant Pollution Monitoring Services 3434 Edwards Mill Road, Suite 112-353 Raleigh, NC 27612 919.602.1297 (office) 919.608.8638 (cell) www.pollutionmonitoring.net POLLUTION MONITORING SERVICE NFIDES InapacNanm and Concufting