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Home My WebLink About20220398 Ver 1_Partial Info Received_202204261 Anderson, Mitchell L From:Eric Romaniszyn <eromaniszyn@enviroscienceinc.com> Sent:Tuesday, April 26, 2022 9:30 AM To:Anderson, Mitchell L Cc:Boggs, Brandee C CIV USARMY CESAD (USA; Clement Riddle; Leslie, Andrea J Subject:[External] RE: DWR 22-0398, Mitchell County School_ Request for Additional Information Attachments:USACE Master_2022-03-17 revised impact map.pdf; 2022-03-29 Water-Sewer Utility Bulletin.pdf Follow Up Flag:Follow up Flag Status:Flagged CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to Report Spam. Good Morning Mitchell, Please find our responses below in red. Certainly feel free to contact me anytime if you have any questions. Thank you! Eric Eric Romaniszyn Senior Scientist EnviroScienceInc.com “Excellence in Any Environment” C. 865‐406‐1281 From: Anderson, Mitchell L Sent: Tuesday, March 29, 2022 4:20 PM To: Eric Romaniszyn <eromaniszyn@enviroscienceinc.com> Cc: Boggs, Brandee C CIV USARMY CESAD (USA <Brandee.C.Boggs@usace.army.mil>; Clement Riddle <clement@cwenv.com> Subject: DWR 22‐0398, Mitchell County School_ Request for Additional Information Subject: REQUEST FOR ADDITIONAL INFORMATION Mitchell County School Dear Mr. Riddle: On March 15, 2022, the Division of Water Resources (Division) received your application requesting an Individual Water Quality Certification from the Division for the subject project. The Division has determined that your application is incomplete and cannot be processed. The application is on‐hold until all of the following information is received: 1. In order to ensure stormwater from the site does not result in secondary or cumulative impacts that cause or contribute to, or will cause or contribute to, a violation of water quality standards, the project is required to provide either: 2 a. A Completed Stormwater Management Plan, OR b. The following items to document that the project will not cause degradation of downstream surface waters: i. A discussion on how the project will not cause degradation of downstream surface waters when considering the volume and velocity of the increased flows and the current size/condition of the receiving stream. ii. Delineation of each drainage area and accompanying calculations to show that flows from every discharge point will be non‐erosive to both the land surface and the receiving surface water during the peak flow from the 10‐year storm event. You may refer to the guidelines from DEMLR ‐ Sedimentation and Erosion Control to determine an appropriate non‐erosive velocity. The permissible velocities for erosion protection are under Appendix 8.05 (i.e. Chapter 8). iii. Calculations to demonstrate that for any discharge points proposed to increase flow rate and volume, the structural stability of the receiving surface water will not be compromised. iv. Designed drawings (both aerial and profile views showing the actual designed dimensions) and calculations of any proposed diffuse flow or detention systems and any vegetated conveyances (if provided). 15A NCAC 02H .0506(b)(3) We respectfully request a conditional approval of our client’s 401 certification application. Due to delays in the architect creating the final building designs, the engineer can’t work on the SWMP until the building design is complete. The building needs to be ready by the start of the 2023‐24 school year, so Mitchell County officials are anxious to be as far along in the permit process as possible so they can start mass grading as soon as possible. Therefore, the applicant requests 401 approval with the following conditions, which are similar to those granted for other projects: “1. The following impacts are hereby approved provided that all of the Conditions listed below and all of the conditions of the applicable Water Quality General Certification, are met. No other impacts are approved, including incidental impacts. Impacts associated with initial site grading may begin immediately provided that all conditions of the applicable Water Quality General Certification are followed. Type of Impact Amount Approved – Permanent Amount Approved – Temporary Stream 0.0086 acres (77.6 linear feet) 0 acres Wetland 0.098 acres 0 acres 2. A final, written stormwater management plan (SMP) shall be approved in writing by NCDEQ DEMLR before any permanent building is constructed at the subject site. The stormwater facilities shall be constructed and operational, and the SMP shall be implemented before the building is occupied. The structural stormwater practices as well as drainage patterns must be maintained in perpetuity. No changes to the SMP or structural stormwater practices shall be made without written authorization from NCDEQ – DWR. The stormwater management plan must include plans and specifications for stormwater management facilities that are designed to protect water quality following the most recent version of the NC DEQ Stormwater Best Management Practices Manual.” 3 2. Please show all proposed utilities resulting in stream or wetland impacts on your plan sheet (including future proposed). If temporary impacts are required for the installation of utilities, provide a detail showing how the stream and/or wetland will be restored/stabilized following utility installation. [15A NCAC 02H .0506(b)(1)] .0502(a)(9)] The utility crossings will occur at the entrance road (see attached plan sheet ‐ Water Sewer Utility Bulletin ‐ for location). There would be no temporary impacts as the installations would be associated with the permanent impact from the culvert installation (see attached impact map). 3. The revised impact table and plans, received by the Division on March 18, 2022, do not include any temporary impacts associated with this project. If there are temporary impacts associated with this project, provide a revised plan and impact table to include all temporary impacts associated with this project. [15A NCAC 02H .0506 (b)(1) and (3)] There would be no temporary impacts associated with this project. Utility crossings would be associated with the permanent impact from the culvert installation (see attached impact map). Pursuant to Title 15A NCAC 02H .0502(e), the applicant shall furnish all of the above requested information for the proper consideration of the application. Please respond in writing within 30 calendar days. If all of the requested information is not received within 30 calendar days of receipt of this letter, the Division will be unable to approve the application and it will be denied as incomplete. The denial of this project will necessitate reapplication to the Division for approval, including a complete application package and the appropriate fee. Please be aware that you have no authorization under the Section 401 of the Clean Water Act for this activity and any work done within waters of the state may be a violation of North Carolina General Statutes and Administrative Code. Please contact Mitchell Anderson at 828‐296‐4662 or mitchell.anderson@ncdenr.gov if you have any questions or concerns. Thank you, Mitchell Anderson Environmental Specialist – Asheville Regional Office Water Quality Regional Operations Section NCDEQ – Division of Water Resources 2090 U.S. Hwy. 70 Swannanoa, N.C. 28778 828-296-4662 office mitchell.anderson@ncdenr.gov Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties