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HomeMy WebLinkAbout20201203 Ver 1_Pre-Filing Meeting Request_20200918ID#* 20201203 Version* 1 Regional Office* Mooresville Regional Office - (704) 663-1699 Reviewer List* Alan Johnson Pre -Filing Meeting Request submitted 9/18/2020 ...................................................................................................................................................................................................................................................... Contact Name * Joey Lawler Contact Email Address* jlawler@smeinc.com Project Name* DENC M-217 Exposure Repair Project Owner* Dominion Energy North Carolina Project County* Rowan Owner Address: Street Address Address Line 2 city State / Frovince / Region Fbstal / Zip Code Country Is this a transportation project? * r Yes r No Type(s) of approval sought from the DWR: W 401 Water Quality Certification - r- 401 Water Quality Certification - Regular Express F- Individual Permit F- Modification F- Shoreline Stabilization Does this project have an existing project ID#?* r Yes r No Do you know the name of the staff member you would like to request a meeting with? Alan Johnson Please give a brief project description below. The purpose of the project is to replace an exposed segment of gas line and to re-establish a permanent crossing of a second stream and wetland area north of the exposure such that mowing equipment can access the area with minimal disturbance. The project area consists of a portion of DENC's 50-foot wide M-217 natural gas pipeline easement. The existing easement is abutted on either side by woodlands and is located on the west side of Wright Road in Kannapolis, Rowan County, North Carolina. A portion of the existing gas line has become exposed in an unnamed tributary to East Fork Coddle LreeK. I ne malntalnea easement is aouttea Dy torestea areas on eltner side. Small stream/wetland complexes are located north and south of the stream where the exposed was identified. Mowing equipment crosses these areas at locations where riprap has historically been placed. Riprap at the northern crossing has become dispersed or embedded to a degree that it is no longer effective to provide equipment support. The vicinity consists of open land, pastures, forested areas and scattered residential development. To replace the segment of exposed gas line, DENC plans to install a new section of pipe below the existing streambed at a sufficient depth to help prevent its future exposure. The work will be conducted using industry - standard mechanized equipment (track hoe and side -boom). Access for construction equipment will be from Wright Road to the south. To prevent impacts to a stream/wetland located between Wright Road and the exposure, timber mats will be placed across an existing riprap crossing. The mats will then be removed and the area restored upon project completion. The pipe replacement work will be conducted "in -the -dry" by constructing coffer dams upstream and downstream of the exposure. A dry workspace will then be established by pumping clean water from above the upstream coffer dam and around the work area to below the downstream coffer dam. The water will be pumped into a filter bag or dewatering structure sited in a vegetated area on the west side of the work area, and the water will eventually flow back into the stream. Secondary containment will be utilized to prevent any leakage associated with the pump. The new pipe will be staged on -site and fabricated as a "box -section" that can be efficiently installed by conventional methods. The new pipe will be placed at a depth approximately five feet below the bed of the stream in order to maintain sufficient separation from the ground surface. Upon installation and tie-in of the newgas line segment, the exposed gas line segment will be removed. To inhibit the potential for future bank erosion and instability, the streambanks within the easement, which are currently eroded and nearly vertical, will then be graded at a 3:1 slope, seeded with a native riparian seed mix and matted with coir fabric. Minor permanent impacts to two wetland areas within the existing easement are also proposed. Riprap was historically placed within portions of WA and WB in order to accommodate passage of tractors with bush hogs and maintenance equipment. Over time, the riprap within Wetland B has been displaced and embedded such that vehicular passage through the area cannot be accomplished without significant disturbance to the wetland. To provide more reliable equipment access to this area during future maintenance activities, the former rip -rapped crossing within the area north of the exposure will be replaced with a new low-water crossing. The low water crossing will be established by installing an articulated concrete block (ACB) mattress across the stream and wetland. The mattress will be embedded such that the stream can continue to flow through the area. The embedded mattress will provide a firm equipment base, allowing mowing equipment to cross the area with minimal disturbance, and the original grade and contour of the wetland can be better maintained. Please give a couple of dates you are available for a meeting. 9/23/2020 9/25/2020 9/30/2020 10/2/2020 Please attach the documentation you would like to have the meeting about. 2- Topo.pdf 1.02MB 3- Soils.pdf 310.85KB 4 - Aerial.pdf 774.54KB 1- Vicinity.pdf 683.2KB pdf only By digitally signing below, I certify that I have read and understood that per the Federal Clean Water Act Section 401 Certification Rule the following statements: • This form completes the requirement of the Pre -Filing Meeting Request in the Clean Water Act Section 401 Certification Rule. 1 understand by signing this form that I cannot submit my application until 30 calendar days after this pre -filing meeting request. 1 also understand that DWR is not required to respond or grant the meeting request. Your project's thirty -day clock started upon receipt of this application. You will receive notification regarding meeting location and time if a meeting is necessary. You will receive notification when the thirty -day clock has expired, and you can submit an application. Signature .I dF,Y 4-� Submittal Date 9/18/2020 Reviewer Meeting Request Decision Is a meeting Required?* () Yes G No Pa B Pa Pa A v V `� < n VaB V Ud �Z 7 W ChA ao PcC2 COPPERHEAD 0.D REBA LN * SITE LOCATION N Sa B S i RnC XD B o ��AKARR�KERRD PcB2 ROADS yq%ELLN 3 U ApB : Appling sandy loam, 2 to 6 percent slopes N Ce132 : Cecil sandy clay loam, 2 to 8 percent slopes y ChA : Chewacla loam, 0 to 2 percent slopes o WILLOWLEAFCT o PCC2 PaB :Pacolet sandy loam, 2 to 8 percent slopes a PcC2 E z PaD : Pacolet sandy loam, 15 to 25 percent slopes — o ,� ROSEBUD PL � Pc132 : Pacolet sandy clay loam, 2 to 8 percent slopes - cotoq PaD PcC2 : Pacolet sandy clay loam, 8 to 15 percent slopes O CH VILLE CIR S 2 rFkgsp RnB : Rion -Wedowee complex, 2 to 8 percent slopes o ARIZONAPL RnC Rion -Wedowee complex, 8 to 15 percent slopes 0 1,000 2,000 SaB : Saw-Pacolet complex, 2 to 8 percent slopes (FEET) Y SaC : Saw-Pacolet complex, 8 to 15 percent slopes REFERENCE: GIs BASE LAYERS WERE OBTAINED FROM ERSI AND COUNTY SOURCES. THIS MAP IS Ud Udorthents, loamy FOR INFORMATIONAL PURPOSES ONLY. ALL FEATURE LOCATIONS DISPLAYED ARE APPROXIMATED. THEY ARE NOT BASED ON CIVIL SURVEY INFORMATION, UNLESS VaB Vance sandy loam, 2 to 8 percent slopes STATED OTHERWISE. WETLANDS AREAS WERE PREVIOUSLY DISTURBED AND LOCATION APPROXIMATED. 0 W : Water SCALE: FIGURE NO. ROWAN COUNTY SOILS EXHIBIT 1 " = 1 000 ' DATE: I I DENC M217 EXPOSURE REPAIR PROJEECTCTNUM 07-UM0 NMBER KANNAPOLIS, NORTH CAROLINA 7335-20-083 kv �10 100 200 (FE ET) Y REFERENCE: GIS BASE LAYERS WERE OBTAINED FROM ERSI AND COUNTY SOURCES. THIS MAP IS FOR INFORMATIONAL PURPOSES ONLY. ALL FEATURE LOCATIONS DISPLAYED ARE APPROXIMATED. THEY ARE NOT BASED ON CIVIL SURVEY INFORMATION, UNLESS STATED OTHERWISE. WETLANDS AREAS WERE PREVIOUSLY DISTURBED AND LOCATION APPROXIMATED. 0 APPROXIMATE WATERS OF THE US EXHIBIT III E DENC M217 EXPOSURE REPAIR KANNAPOLIS, NORTH CAROLINA APPROX. EASEMENT STREAMS WETLANDS SCALE: FIGURE NO. 1"=100' DATE: 7-21-2020 4 PROJECT NUMBER 7335-20-083