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Home My WebLink About20170239 Ver 1_U-3109B - 4C Merger Meeting Minutes_20180409DRMP, INC. PRINCIPALS Wayne D. Chalifoux Donaldson K. Barton, Jr. Glenn J. Lusink Jon S. Meadows Mark D. Prochak Mark E. Puckett Lawrence L. Smith, Jr. OFFICES Boca Raton, Florida Charlotte, North Carolina Chipley, Florida Fort Myers, Florida Gainesville, Florida Jacksonville, Florida Lakeland, Florida Melbourne, Florida Orlando, Florida Panama City, Florida Pensacola, Florida Raleigh, North Carolina Tallahassee, Florida Tampa, Florida 1.833.811.3767 www.DRMP.com Memorandum DRMP Job #: 16-0264.001 To From: Subject: Craig Lee, P.E. Ryan Mitchell, P.E. 8000 Regency Parkway, Suite 175, Cary, North Carolina 275180 Phone: 919.650.1038 Date: February 18, 2018 U-3109B — 4C Merger Meeting, Division 7, Alamance County A 4C Merger Meeting was held on February 15, 2018 at 3:00 pm in the NCDOT Century Center Complex, Structures Conference Room `C' in Raleigh, NC. Those in attendance were: Bill Elam Mark Staley (phone) April Norton Jim Mason David Teague Piotr Stojda Nick Lineberger David E. Bailey Patty Eason (phone) Chris Haire Ryan Mitchell NCDOT NCDOT DWR NCDOT NCDOT NCDOT NCDOT USACE NCDOT DRMP DRMP — Hydraulics Unit — REU — ECAP — Geotech — Roadway — Cong. Mgmt. — Division 7 919-707-6718 919-707-2948 919-707-9111 919-707-6136 919-707-6877 919-707-6322 919-814-5079 919-554-4884 x30 336-4887-0000 919-230-7857 919-650-7859 belam@ncdot.gov mstaley@ncdot.gov April. norton@ncdenr. gov Jsmason@ncdot.gov dteague@ncdot.gov pstojda@ncdot.gov nclineb erger@ncdot. gov David.bailey2 @asce. army. mil peason@ncdot.gov chaire@drmp. com rmitchell@drmp.com An overview and update of the project was provided. The proposed roadway will cross Mill Creek and one (1) unnamed tributary to Mill Creek. The project is within a Water Supply-II (WS-II) watershed and located along the '/z mile Critical Area (CA) buffer of the water supply reservoir. This project will include protection measures such as Hazardous Spill Basin (HSB) and grass swales to the maximum extent practical (MEP). This project has been grandfathered and the Jordan Lake Buffer Rules do not apply. The meeting included a discussion of all jurisdictional areas impacted by the project. The following is a description of the topics discussed at each site: • Site 1: A 12'x 6' reinforced concreate box culvert (RCBC) will be constructed to provide conveyance of the unnamed tributary to Mill Creek, Jurisdictional Stream SA. The culvert will include sills and baffles and will be buried one-foot below existing surface. The hydraulic design includes HSBs for outfalls to this stream. David Baily asked that the sill and baffle detail be added to the culvert profile sheet. David Bailey and Jim Mason discussed if mitigation was needed for surface water impacts at the downstream end of the culvert where riprap is to be installed in the stream bed. Follow-up determination is to be provided by Jim Mason. Site 2: The proposed roadway will include a single span, 160' steel girder bridge over Mill Creek. Spill throughs will be at 1.5:1. Hydraulic design will include HSBs for outfalls to this stream. Bridge bents from revised bridge design to be removed from final permit plans. R:\U3109B\Admin\03-01-Correspondence\03-01-06-Memorandums\DRAFT U-3109B - 4C Merger Meeting Minutes.docx Page 2 of 2 • Site 3: The crossing at Jurisdictional Stream SB will include a 42" cross pipe with headwall on upstream end. The pipe will not be buried. Riprap end treatment to be used for pipe outfall. • Site 4 and 5: The crossing at Jurisdictional Wetland WA and Jurisdictional Stream SC will include a 30" cross pipe. Pipe will not be buried. No headwall and standard riprap pad at outfall. The location of the Jurisdiction Stream on the plans will be revised by Location and Survey to match the pipe outfall location. David Bailey stated that compensatory mitigation will not be required for Stream SC impacts due to low aquatic function. 2:1 mitigation will be required for impacts to Wetland WA. • Site 6: The crossing at Jurisdictional Wetland WB will include a 30" cross pipe. The pipe will not be buried. No headwall and standard riprap pad at outfall. Cross pipe inverts to be placed at existing ground elevation for all wetlands. Excavation for ditches in wetland areas will be minimal (approx. 4"-6"). The location of the Wetland WB on the plans will be revised to match the pipe outfall location. David Bailey noted that ditch detail "F" is not found on the ditch detail sheet. The call out for these ditches will be revised to refer to ditch detail "N". • Site 7: The crossing at Jurisdictional Wetland WC will include a 36" cross pipe with headwall on upstream end. The pipe will not be buried. Riprap end treatment to be used for pipe outfall. Wetland fill hatching to be added for rip rap outfall and accounted for in impact summary table. Wetland boundary to be extended on south end of wetland to reflect actual boundary. Explanation for why alignment was changed to this location needs to be added to permit narrative. ACTION ITEMS DRMP: Revise permit plans in accordance with comments stated in these meeting minutes. NCDOT: o Revise WB and WC wetland boundaries in WEX CADD file. o Revise location of Jurisdictional Stream SC in FS CADD file. o Determine mitigation needs for rip rap in stream bed for 12'x6' culvert outlet. End of Memorandum R:AU3109B�Admin\03-01-Correspondence\03-01-06-Memorandums\DRAFT U-3109B - 4C Merger Meeting Minutes.docx