Loading...
HomeMy WebLinkAbout20140268_04_PBC-TMP Phase II Peer Exchange Meeting Report (June 2012) - Appendix C_20150317• � � NCDOT Presentations at Peer Exchange Meeti ng Bonner Bridge Replacement Project - Phase II Peer Exchange Meeting October 24-25, 2011 Overview of Bonner Bridge Replacement Project Studies Coastal Studies • Oregon Inlet migration, profile, and gorge alignment • Impacts of overwash • Historical and future shoreline position • Accelerated sea le�el ri�e. • Potential locations f�rJ I°mpacts of an island breach • Offshore coastal processes Meeting Purposes • Evaluate the changes in coastal conditions (shoreline position, dune stability, habitat) that resulted from Hurricane Irene • Identify issues, constraints, and concerns associated with the future maintenance of NC 12 • Provide engineering advice on design parameters for long-term transportation options at the two breach sites • Bodie Islani Rodanthe • Includes thi NC 12 "hot • 50-year pro Project Area Natural Systems • Surface waters and water quality • Biotic communities • Wetlands an;�l t� :� ����t • Unique and rare f�abitats • Fisheries and wildli�e • Threatened and endangered species Project Alternatives • Beach nourishment • Road relocation • Bridging — In NC 12's current location — West of t 'ne • Phasing - Selected Alternative (2010) • Coastal monitoring program within project area • Refuge habitat/NC 12 vulnerability forecasting study • Environmental review/determine alternatives for study • Use NEPA/Section 404 Merger Process to study, select, and finali�e future phases � w�+fc oaaa�n, �rirbNa+asw� � �A . � �' ��►��'� � , � :.- �-:,_ _ �.4 � Selected Alternative (2010) • Parallel Bridge Corridor with NC 12 Transportation Management Plan • Includes construction of "short" bridge across Oregon Inlet, and..... Selected Alternative (2010) • Coastal monitoring program within project area • Refuge habitat/NC �2 vwlnerability forecasting study • Environmen��,:-� _�r,�e alternatives for study • Use NEPA%Sectimn 4�41�1erger Process to study, select, and finafize future phases _� A�I--T24ti'C Ci�-2�r-2U79 Ftcdam�a � C-3 Bonner Bridge Replacement Project - Phase II Peer Exchange Meeting October 24-25, 2011 Selected Alternative (2010) • Coastal monitoring program within project area • Refuge habitat/NC 12 vulnerability forecasting study • Environmental review/determine alternatives for study • Use NEPA/Section 404 Merger Process to study, select, and finali�e future phases Coastal Monitoring Program • Methodology: — Aerial photography, four times per year — Bathymetric data — Grain size analysis — Analysis of NC 12 maintenance data — Annual field surveys to determine changes in biotic communities — Collect agency data on storm events, dredge disposal/beach nourishment projects Overview of Future Coastal Studies Coastal Monitoring Program • Collect data on: — Geomorphological characteristics of corridor — Distance of critical features (dunes, shorelines) to NC 12 roadway — Location and extent of overwash — NC 12 roadway maintenance activities — Changes in biotic communities/ habitat — Data on dredge disposal/nourishment projects — Data on major storm events Coastal Monitoring Program • Summarize data collection into: — Annual reports that discuss findings of the program, changes in project area conditions — Annual reassessment of predicted shorelines — Additional report every five years- includes data from other university or agency studies Vulnerability Study • Work with USFWS to assess possible scenarios • Study to be �,"" " ��en:dent panel • Results to be reviewed every five years Proposed Schedule — Long-term Repairs • Scoping—Oct 18, 2011 • Convene Expert Panel re: Coastal Conditions—Oct 24-25, 2011 • Merger Team Meeting (CP2/2A) — Dec 2011 • Public Involvement— Dec 2011 • MergerTeam Meeting (CP3)—Jan 2012 • Contract awarded for Pea Island —Aug 2012 • Design-Build contract awarded for Rodanthe — Dec 2012 Permit Conditions • Analyze change to Refuge habitat due to terminal groin — Use STELlA:,o� s'r"',' j�:software • Re-evaluat�,�r�:. ;_ '��vTeline erosion • Geo-spatial �t:���� � � ����:�n�lv�ae Refuge habitat changeS- • Quarterly monitorirt,g af physicaf and biological parameters along ocean shoreline . � _� � � � . t��,�'� ' ' � r�-c: r `. �- ;���a�ricane Irene Impacts to NC 12 ?f-, 1: � August 27, 2011 � , � �" ' ` � �r� , �,�. `� �" ,�`s ; �. ' .� ` 1� _ " 'w,,, ' ��-, •, 1 h C ` t��' .. ~ . ` � � „� +� � � . ta�1i'�- . _ �:3f� ��r�,.., aJ'�f-� � � _ -. ��._.� T �� �, �� .�.�, � I F a � I _ ,'� .- R - � / �'` �$�_ _ - � �� r � i _ ,� � °�„` � ' ''�2 y. ; f� .. -_ • 1 � � " ' �'' :��,� r; i�,_, �` � , � ,�. � ' tJ' �����i. _!.�'�- d� I - _ C-6 Rodanthe Breach ,' a : South Pea Island Mirlo Beach, / � 5-Cu rves . t � u - — .-�`" '- .. i,. �,;' ' e� � � ',� _ -.... III.` , � �1R-. � :1n ' . f e' . � ' � _� Y_ � ,:�1 .. �; � �,. �� •y,l1p `� �' �� ^'M �^�' �w+ �`�'� � $ � � � r e..� �-�� -��• � �,�� !� � �. ��� F �� �; � .� -� :.� � 1 I -.� , J ��- . .� � ,,,r,--- - ' _ �.Y �..._.-,� .+i�� ,. — _ As.--.- �- �ay;.�r. J -�IIIL� _� �. ��. - ._� _ -� ��_� �.-. ,���.� �� '- � 4 '�� � � �_� . �"� � � �� �., r • � � � � ��V• 1 / {� r� ' � :� � - . �� 1 :�,,;,n� �.- - - �urr� C ��# �4'a.�:w'�' '.�T`� . ��, . a+.� ..��w. ► .:_ _ ��"� k�z��..� ��_ � _ -- � _ � �_ _:;� _ ;� ...__ �� ,�� -�� -� .fi _� � J_ - -- �iilil��� : , -� -- . � � ��- .�� . � �_ _ - `� `��- -� � � � - o:_ � � � i� ��„r, ��*���^ �- �. �"� � ; �-�, �� �._ � y�. ,; � , .�' - �, C-7 � � �►'{' � i�i, : ��p� � b � 1 .N^�F��" �' � I �. I �'r � = . �, +F�� ; � t�- ,��•�,.� ; i , _ _ -:.�s �.� � �;� � ti ( ��.�F�r ��. - i '> � " �`�,. •"t _ _� ^°"M`;W„�� s��,� - r� x � , � � •i -�_ �� � _. �. - �.�.. _ —_: . - . . ...� , �r �^ W -, � � � ,__. _� � - � �� . - - ,� �,� � ,, � - � : �. . �'�M .r �,� � �� , � � :� � , -� ,."� i _ � � _ `� �� � J ,� - �+`� � ' ' _ _ i��' � �� � � a- .: ' i � �a � � _ -_ ___ � ���v �a 1 � 'P .: uY,,_ _ ' � ,� � i�,iw � -..�M, � �w �, . , ��.��,.,::�-�ii� (� �, k %-��. _ � 'r1'� i_� f �� � � � �" �'� r��_ -��_� ��� .^ - � � � . : �`aZ ' �' .��`����_ ' � _ .+r�� " .�' } �i,+ �� � � . J . = ��. � . s� ���. . �' . . � ., iri�• _� � ��f As r� 11� � �lil;� , , _. �,� a . � �� � �I� . -�„���� � "- #. ' .�•.�1�i'"" --� - -- --� _ i , -,=., � �� � � � � � � �/�'���.��`� �„ : � � � -J Y��. ��i'�_ i '� r C-8 3 � �. � -_ =;,� �,1- - .� � �...�� - _ . ,,� ,'°��.�_ f � �#. � C-9 �:. - - ,� . . - �, �� � � � � _ ��r f _ = __ .. � � �,.�,��- - � _ �� ,�:,� .,.� : _..._ . .-..� - �.�,-=-_ - _ - � ---� - � -�,,� - __,� `� � �= . .� ..i � � � -- _ " � � . _ ``�-+- _ _ �_ � �{ �.�� ,. � - i S ���' �' —� � ' � �.— y J ' _ - r� � v �� -- ` - � - ��.., ,.... . �� - txi.,� _ � ` 4 � � ,_ ._ . �� .�,� ,. � t � `� r.r�-aa�.:r.x�"-y - - � 4 � _ ` "�� �� � /� _ � z �- C-10 ,q�M •! J�we�f'�w +I���. 1 asi. � � `,;,t-�'t —��-�4- lr��� � 'r _ _'��i.""�'� � v. . -:: �.., ,a�� _ ��� � -� � ' - `'�= � �.�-� -` 3' '�' � � _���,� - ' � � � ^� t��.�.�_ -� r `; �����- 5 � � ��, �i.�+-> '�'° r� ?"{-aw� ,�`;,� r � . M � ''�'-'L �. �L,N - - C � ��,X.+. —q�3°'h`-a yq� !�� � I " . "�� �� � s � � ,� � _ � .a� €� ..��4s� � �..� — � t• � y - � �. �� ��� �`., � ,.:� ' �a f�NR��lE� . - . �.. � ,�` �MM� � - . 4 � `�. , �"� - - - .. . . � �' �� _i� �j . � , I f �� _� "' ..� . . . . ._ � .. . C-11 - �- - c�� ��, '"� _ � � r � � +��`���- _ �.� • � . �.�+�r�. �'�y�,' �4 _ r���' � . �'r_ .t 'BFr� . _. v�� _ ' �-. .— � v� .r r�,,,r�,� _ � ' ' ������ _ �1� �, .�3" , � .j - 4;j6c��' � �RiY� � ��� ' ,�- ,.� � . _. ' _. � . _ , il+ � � � 7VIid-Pea Island Breach � �a: Old Sandbag Area , Ranger Station '� � � New New Inlet '� 1 , .� � r t C-12 ��'�� �:3„ -- a� `:.,� - - �- ��� � � _: �� �- ,� r� - �,,��:. ` �, - „ ,; `�,�, �� d _ ��J �� ��f �1 ' �• �- `,. _.�� ��-� \.i-� �^A � t. _ f� x ��.'d��+�-.-�°�k 1 �� � •t�� '� � y�i��%; i _' ♦ � r � wr..� � s:' �"' , ti '� �� � � �, � �-,� _�_ t+�g ' � � :,,��. � # � :,fJw r r, r4�y •).i,..`��. 'a. C� er ,. ��i .+-� ������ ��� � "� t . i�)�- � �'� � �{.���C-j'"� 4 x ' y�C � � � ."1 : �A .. 7 .J - - ��� �f ` ��_� �� �' � i ��., - __ � .;-•� �� _ �� }: C-13 g C-14 s (�� t� kr� � [ � ��r�. I �� ��r- A �. . �-�.�:.�.« �..> + . . a� � � � _ 1 I M' �� a � �,�' �s � ,f E _ s� �� . �t.r t rA'. - ' _ �__ . C-15 10 '` � �`� � " _"°-'�, r ��-� ,; , R - -- �„ - - - - ��s- 4 � - � _ = --�s=� �--_�, - �; ,� - - . � � - . C-16 11 .� �`�, �;, ,, "'4 �� � �j � ..;- - - C-1% ��� f= -- _. - r "� � ��.r_-. � �■; °-_-�_ _ _ .�� � ' � ��'��'� f ' 1 � ��l :�� , _ �� � I ��� � -�;, � • � ' _ ti : Ji� "` - � � / � � �� � _ �l �-�8 4 ,� J �• � �� �� � =�.��- �'-1� �.._� 13 Contact Information: ��z�1 Jerry D. Jennings, PE `�,' Division Engineer �-� jjennings�ncdot.gov (252)482-7977 .�� _ - - ' - ' v_,-. . �'-�� --'}� _ v� °,�� -- - -' -- - ; _ _. _. �-.-_ -- -. ._. � .:1_5 C-19 14