20100362 Ver 1_Meeting Minutes_20080820

Subject: Minutes from Interagency 4B Hydraulic Design Review Meeting
On August 20, 2008 for U-4007A in Onslow County
Team Members:
Brad Shaver-USACOE
David Wainnght-NCDWQ
Travis Wilson-NCWRC
Steve Sollod-NCDCM
Steven Lane-NCDCM
Gary Jordan-USFWS
Kathy Matthews-EPA
Chris Militscher-EPA
Donnie Brew-FHWA
Chris Rivenbark-NEU
John Merritt-NEU
(present)
(present)
(absent)
(present)
(absent)
(present)
(absent)
(present)
(present)
(present)
(present)
General Comments:
Participants:
Marshall Clawson, NCDOT Hydraulics
Dan Duffield, NCDOT Hydraulics
Josh Dalton, Sungate Design Group
Brian Elam, Sungate Design Group
Mason Herndon, NCDOT Division 3
Timmy Zepeda, NCDOT Division 3
Brian Yamamoto, NCDOT PDEA
Jim Rerko, NCDOT Division 6
Omar Azizi, NCDOT Structures
Emily Murray, NCDOT Structures
Marshall Clawson started the meeting by introducing the project and stating that the purpose of
the meeting was to review the 30% hydraulic designs and show that the commitments made at
the 4A meeting were met Mr Clawson then handed the meeting over to Josh Dalton Mr
Dalton proceeded through the project sheet by sheet explaining the proposed drainage design and
fielding questions
Plan Sheets 4:
There are no streams or wetlands on this sheet
Plan Sheets 5:
Mr Dalton noted that there is an existing culvert under US 17 Bypass that will be extended on
both ends Two jurisdictional streams converge dust upstream of the existing culvert The
existing culvert is a double barrel 6' by 8' RCBC The barrels of the culvert will be extended
separately in the direction of the two channels
Downstream of the existing culvert, Scales Creek will be conveyed under Loop A and Ramp A
by double barrel 6' by 8' RCBC's The culverts will be separated by approximately 220 feet of
open channel Photographs of Scales Creek and the UT to Scales were passed around and the
extreme amount of garbage in the streams was noted
A small portion of the wetland will be left in the gore area between Ramp A and Loop A This
wetland will be considered a total take
I s
A wetland will be impacted along Ramp B Discussion occurred regarding the installation of an
equalizer pipe to provide hydrology to the isolated wetland between Ramp B and Loop B Chris
Rivenbark will discuss with Lelam Paugh and inform us of the decision If an equalizer pipe is
installed and the wetland not considered a total take, a commitment will need to be added that
this area is not mowed
Plan Sheets 6•
Mr Dalton noted that the road crosses the UT to Scales Creek A 66-inch RCP buried 1-foot will
be installed at this location A small wetland will also be impacted at this location Mr Dalton
mentioned that preformed scour holes will be used outside of the wetland areas
Photographs of the stream were passed around and again the garbage and tires in the stream were
noted
Plan Sheet 7:,
Mr Dalton stated that a wetland exists right of stations 42+50 to 45+00 -L- This area is
currently shown as cut, but expressway gutter will be installed to remove the cut ditch from the
wetland area
Plan Sheets 8:
Mr Dalton stated that a small wetland exists right of stations 55+00 to 58+00 -L- This area is
currently shown as cut, but the curb and gutter will be extended, past the wetland to remove the
cut ditch from the wetland area
Mr Dalton stated that there is aj unsdictional stream parallel to and north of Huff Drive This
stream enters an existing 36-inch RCP and exits the system from an existing 60-inch RCP on the
west side of Western Boulevard A portion of this system will be revised
Additional Discussion
A layout of the culvert extension at US 17 was provided to Mr Zepeda for constructabilrty issues
and input regarding construction phasing
Meeting Adjourned