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Home My WebLink About20130918 Ver 5_U-2525C 4B meeting Minutes_20151124Subject: Minutes of the Interagency Hydraulic Design Review (4b) Meeting on November 12,2015 for U-2525C, Guilford County Participants: Team Members: Other Attendees: Bill Elam, NCDOT Hydraulic (present) Linda Johns, NCDOT Hydraulics Felix Devila, FHWA (not present) *Patty Eason, Division David Bailey, USACE (present) Carla Dagnino, NCDOT NES Gary Jordan, USFWS (present) nR.�,-i� c+.�ro,�n�rT �� n � �Il�iar� I�.csl�ir�_scsr�� NC'�C9T_I�,csad�✓ay Travis Wilson, NCWRC (not present) 1Vlack Bailey�-�N1U----------- - *Cynthia Van Der Wiele, USEPA (present) *Michael Abuya, NCDOT Planning *Dave Wanucha, DWR (present) Lisa Feller, NCDOT PDEA ��Maxk Stalev, REU (�present) Anne Gamber, Wetherill Eng. Harminder Singh, Wetherill Eng Matthew Harvey Wetherill Eng. Erin Cheely, NC�OT PDEA Byron Moore, NCDOT NES ��a�Il�i�a f-�azel NC'�C9T_I�.csad�✓ay __ __ _ _ _ _ _ 3__ ________________________________ *��l�l"� S��-�U -1��'_��T� ° _- � �--------------- ---------------- , , k�.'"_�,.;,,,.. �T�..-�..9 �hf4'"P�"!�`1T' ' �1� t� �� Ori� �� , Anne Gamber opened the meeting commenting that in August of 2010 we received a letter stating that our project had been grandfathered out of the Jordan Lake Watershed Buffers. She commented that throughout the project every effort was made to minimize impacts and protect storm water though best management practices. Ms. Gamber then proceeded to go through the plans sheet by sheet addressing the impacted streams and wetlands. Items discussed are summarized as follows: General: Proposed storm drain systems that show up dashed in black were designed under the U-2525B or U-2524D projects, and have been permitted under those projects as well. Storm Drain systems for the U-2525C project are shown in red. A legend will be added on applicable sheets to clarify this. 2. Plan Sheet 4: No impacts, streams impacted were permitted under the U-2525B Section. Plan Sheet 5: At the 4a Meeting there was discussion about the direct impacts to wetland and streams that are located under iill, and indirect impacts where they are located in between two sets of roadways. These areas will be looked at on a case by case basis. In cases where there is a decrease in function there will be a 1:1 mitigation. The indirect impacts will be further discussed during the 4C meeting. 4. Plan Sheet 6: Stream and wetland impacts occurring due to roadway iill. Plan Sheet 7: The stream shown at WBQ was a JS stream in the original permit, but since then has been determined to longer be a JS stream. Also an additional portion of wetland has been added to the WBQ wetland. Stream SBT will only be impacted during the erosion control phase. 6. Plan Sheet 8: Stream and wetland impacts occurring due to roadway iill. 7. Plan Sheet 9: No impacts. Plan Sheet 10: Additional wetlands have been added that were not in the original permit these include WBU and WBL. The 42" pipe along stream SBO begins outside of the jurisdictional area and will not need to be buried. If velocities are high at the outlet of the pipe a ��dissi�a�or -pad may be used since the stream is already being impacted. �� a,u�a�^ ��,,��^��, �,��^�� a �� u� ��^��nu��^cV �n�u�u?��uc�� n��:J' ��c�� l�^ ��^�p�nu,��^cV ud��^ ��a.��a u� �;,;c�r��^��^�V l�� ur�� ^�� ^ �^�u��u�� l�„cV �^��^r��,�u��. lld��°��c9.la��;�� la� ti � ��rr�� ° ��•�;�� ur��a �•�p� �•��a ��c9 ��;��F�;�•�TM�c�9� ��u�� a��r�w��; �:��rc;��:�, �n��u�:��u�� r �ac; ��c�a��n��c;e9: 9. Plan Sheet 11: Wetland WBP was not show in the original permit but has since been added. Stream SBP has been diverted into a ditch along the south side of the alignment. 10. Plan Sheet 12: The wetland labeled WBO is incorrectly labeled. Wetland WBO is located under the roadway near station —L- Sta. 363+00. The wetland incorrectly labeled as WBO is outside of the study area. 11. General: Due to the length of some of the culverts throughout the project there is more concern with stabilization than aquatic passage. Language should be added to state that the culverts can be backiilled with rip rap and/or native material in order to stabi]ize them. This will be Y Y � q i�5�5� ��cV q i�S��I� etermme on a case case asls as �recte t e DEO._ll�� ,, p� � " V `��"�;lfu(bllV`� (bd°lf��" Il•(b�.�"�;lf lf�T�i.^,Il•�" l%v��`�..`�(b��" Il�;�u`�c��u?,;,llV��"VV�I�.��"lf�%v�"��VV lf�T��" �,��;lf�l�� lfIl•�"�� .�(b�;��lfu(bllV ��VVc��.. �%v�� %v�� ^ p��,�.11�� e�9��c9u�u��,.r��; ti��;��ti� �� ti � � ��•�,� , ,��;��r�� r �^c;.�� ;��u�rc;��r .�. ��u�� r�� 1��; �;��ti�1�u��?�..�r�•�;�� u�� 1�� V��,��;��r �a�•��;�;1�a. The desi�n should allow for some modifica�ions �o �he inle�s and ou�le�s �o accommoda�e �hese inconsis�encies. 12. Plan Sheet 13: Stream SBV will be diverted into stream SBW stream stabi]ization will be added where the tie together. The remainder of stream SBV below the diversion will be retained and tie into the ditch running parallel to the alignment. 13. Plan Sheet 14: No impacts. 14. Plan Sheet 15: Stream impacts due to roadway iill. 15. Plan Sheet 16: The pond will be drained near —L- Sta. 441+50, this is a possible location for stream or wetland mitigation credit. WBI seep could see a loss in function due to the removal of the pond upstream. 16. Plan Sheet 17: No impacts. 17. Plan Sheet 18: Stream SBE will be replaced by a ditch due to roadway iill. Additional impacts may be added if and when ramps are added to quadrants B and D of the interchange. 18. Plan Sheet 19: Culvert slope is less than one percent and will not need to be backiilled. 19. Plan Sheet 20: Stream and wetland impacts occurring due to roadway iill. Wetland WBG was not shown in the original permit but has since been added. 20. Plan Sheet 21: No impacts. 21. Plan Sheet 22: Stream and wetland impacts occurring due to roadway iill. If the 54" cross pipe has a steep slope it is possible that a drop could be added at the junction box near the outlet of the pipe. This will be determined after further analysis of the crossing. 22. General: A detail for modified headwall that has a one foot sill placed at the existing stream bed elevation will be distributed by NCDOT. The function of the sill will be to prevent head cuts at the inlets of culverts. Due to length of some of the cross pipes throughout the project further investigation will need to be done with the agencies to determine if it is necessary to bury them a foot. 23. Plan Sheet 23: No impacts, streams impacted were permitted under the U-2524D Section. 24. Plan Sheet 24: No impacts, streams and wetlands impacted were permitted under the U-2524D Section. 25. Plan Sheet 25: No impacts, streams impacted were permitted under the U-2524D Section. 26. Plan Sheet 26: No impacts. 27. Plan Sheet 27: No impacts. 28. Plan Sheet 28: No impacts, streams and wetlands impacted were permitted under the U-2525B Section. 29. Plan Sheet 29: No impacts, streams and wetlands impacted were permitted under the U-2525B Section. 30. Plan Sheet 30: No impacts, streams and wetlands impacted were permitted under the U-2525B Section. 31. Plan Sheet 31: Stream impacts due to roadway iill. The stream running parallel to the Northeast side of the alignment should be labeled SD instead of SB. 32. Plan Sheet 32: Stream impacts due to roadway iill. 33. Plan Sheet 33: No impacts. 34. Plan Sheet 34: No impacts. 35. Plan Sheet 35: No impacts. 36. Plan Sheet 36: No impacts. 37. Plan Sheet 37: Stream impacts due to roadway iill. No stream is shown at the outlet of existing 42" pipe that is being extended. This will need to be investigated further. 38. Plan Sheet 38: Stream impacts due to roadway iill. 39. General: Further investigation will be done in order to determine if the Hazardous Spill Basins C�lri u^"rrc�oi��a��crriTr=vr'�aiv'"r-acccc 4rcivi P"a"�ic "" >�ll on u.�"r�1T1COT'�OP$�� S�OPffiW$��P �P�$�ffi�Tl�. MLH