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Home My WebLink About20130877 Ver 1_Streambank Repair_20130814@McGiff A S S O C I A T E S June 27, 2013 Mr. Kris Boyd Planning Director Haywood County, North Carolina 157 Paragon Parkway, Suite 200 Clyde, North Carolina 28721 Dear Mr. Boyd: FILE COPY Project # File # RE: Floodplain Development Permit Application Riverbank Restoration at Steel Bridge West Fork Pigeon River Haywood County, North Carolina Please find the following attached documents as part of our application for a Floodplain Development Permit for the riverbank restoration near the Steel Bridge crossing the West Fork Pigeon River: 1) a project narrative, 2) a digital copy of the proposed hydraulic model, 3) a HECRAS output table, 4) a map showing the proposed project area, and 5) a check for $150 for the application fee. Please do not hesitate to contact me or Dale Pennell should you have any questions about our application. Sincerely, McGILL ASSOCIATES, P.A. BRENDAN SHANAHAN, PE Project Engineer Enclosures cc: Mr. Tom Covington, NC Wildlife Resources Commission (w /enc) P:\2012 \12.00140 -Steel Bridge\ misc\ DocumentsForKrisBoyd \CoverLetter.docx E n g i n e e r i n g • P l a n n i n g ® F i n a n c e McGill Associates, P.A. • P.O. Box 2259, Asheville, NC 28802 • 55 Broad Street, Asheville, NC 18801 828 - 152 -0575 • Fax: 828 -252 -2518 nMcGill A S S O C I A T E S June 27, 2013 Mr. Kris Boyd Planning Director Haywood County, North Carolina 157 Paragon Parkway, Suite 200 Clyde, North Carolina 28721 RE: Floodplain Development Permit Application Riverbank Restoration at Steel Bridge West Fork Pigeon River Haywood County, North Carolina Dear Mr. Boyd: I would like to summarize our progress regarding our proposed project to repair the severe erosion of the West Fork Pigeon River stream bank near the USGS monitoring station at the Steel Bridge Road crossing on NC 215. McGill Senior Project Manager, Dale Pennell, PE, met with you in March 2013 to discuss the bank erosion problem and the possible solutions. At that time the concern was raised as to how such a project would affect the Church located approximately 850 feet upstream of the bridge. It was established that prior to the issuance of a development permit a study would need to be conducted to determine the potential effect at cross section 50938, which is located at the church. The study was based from the effective model for the West Fork Pigeon River, which was received from the North Carolina Floodplain Mapping Program on March 26, 2013. Two cross sections (50271 and 50527) were added to the model between the effective cross sections 50092 and 50938. The section of bank that has been eroded is located at effective cross section 50092. For the "Existing Conditions" model, this cross section was updated to include a survey of the bank conducted by McGill Associates in February 2013. The "Proposed Conditions" model was created using the proposed design for the bank repair using gabion baskets. The models were run in HECRAS 4.1.0. The comparison of the "Effective ", "Existing" and "Proposed" model results are shown in the attached table. The modeling shows that the proposed project would: a) reduce the base flood elevation (BFE) by 0.13 feet at cross section 50092, b) increase the BFE by 0.01 feet at cross sections 50271 and 50527 and c) not change the BFE at cross section 50938. E n g i n e e r i n g o P l a n n i n g • F i n a n c e McGill Associates, P.A. • P.O. Box 2259, Asheville, NC 28802 • 55 Broad Street, Asheville, NC 28801 828 - 252 -0575 • Fax: 828 - 252 -2518 Mr. Kris Boyd, Planning Director June 27, 2013 Page 2 of 2 Attached are 1) the HECRAS output table, 2) the cross section location map and 3) a digital copy _of the hydraulic models. Please do not hesitate to contact me or Dale Pennell should you have any questions about this study. \ / \\�V C AR , Sincerely, Q` • • • • j0 • MCGILL ASSOCIATES, P.A. O.• ��S S •.?� i� • SEAL 9 �.,•a 038718 r ZZ BRENDAN SHANAHAN, PE V. Project Engineer .j P:\2012 \12.00140 -Steel Bridge\ misc\ DocumentsForKrisBoyd Warrative.docx HEC -RAS River: West Fork Pigeon Reacn: heacn -I rrumv. ivv -yca, Top Wdth Act (ft} 93 Area (s4 ft) 939 Vel Total (mss) 12.4 W.S. Elev (ft) 3016.57 Base WS (ft) 3016.57 Prof Delta WS (ft) Reach River Sta Plan 52839 Effective Model Reach -1 93 93 939 12.4 3016.57 3016.57 Reach -1 52839 Existing Cond 939 12.4 3016.57 3016.57 Reach -1 52839 Proposed Cond 102 830 14.0 3009.83 3009.83 Reach -1 52293 Effective Model 102 830 14.0 3009.83 3009.83 Reach -1 52293 Existing Cond 102 830 14.0 3009.83 3009.83 Reach -1 52293 Proposed Cond 179 933 12.5 3004.14 3004.14 Reach -1 51782 Effective Model 179 179 933 933 12.5 12.5 3004.14 3004.14 3004.14 3004.14 Reach -1 Reach -1 51782 51782 Existing Cond Proposed Cond 200 1444 8.1 2994.01 2994.01 Reach -1 50938 Effective Model 199 199 1435 8.1 2993.96 2993.96 Reach -1 50938 Existing Cond 1433 8.1 2993.96 2993.96 Reach -1 50938 Proposed Cond 535 2291 5.1 2991.38 2991.38 Reach -1 50527 Existing Cond 535 2296 5.1 2991.39 2991.39 Reach -1 50527 Proposed Cond 499 3414 3.4 2990.99 2990.99 Reach -1 50271 Existing Cond 499 3422 3.4 2991.00 2991.00 Reach -1 50271 Proposed Cond 180 2661 6.9 2989.77 2989.77 Reach -1 50092 Effective Model 152 2388 7.4 2989.54 2989.54 Reach -1 50092 Existing Cond 144 2282 7.9 2989.41 2989.41 Reach -1 50092 Proposed Cond Bridge Reach -1 50048 154 154 1494 1494 9.0 9.0 2986.17 2986.17 2986.17 2986.17 Reach -1 Reach -1 50002 50002 Effective Model Existing Cond 154 1494 9.0 2986.17 2986.17 Reach -1 50002 Proposed Cond 202 202 202 3143 3143 3143 9.4 9.41 9.4 2981.31 2981.31 2981.31 2981.31 2981.31 2981.31 Reach -1 Reach -1 49624 49624 Effective Model Existing Cond 1 Proposed Cond Reach -1 149624 y =Y �., �. ,. .; =` A ti..;.•�, ..- 'tj ire '' -. < t - PLAN Lij s ae -� � i ! i • , c ANMBANK REPAIR AREA .4 4 *�T- ,. _, ;. . .. ice.. -bt `f :� t,is -_ ! :.qy„ + _- - 'Z• c ;�- -��... -- J r - _ - 4 p _ e •. - - . , 3 i - a A �� a _ ^.. � '.- �,-•'�. -"'�. : ":v ° *n..�., •4 , i- r,' - s '..^ins �i�' - + .,�.- ...",:' - ' �� _ - .�' �{� i '_••Y �f__ �v -�� — , - G R AV • ACC E S ARE A .. _ a. M � - RC?SS EC �, •,,�;�. ��,; _ . - _ ;. __ � � _ `S TIQN 50092 - .�� a ^ha _ y - -i tii • �,:,• :; r N 5 .e t y_ a; 4 C ._ 02 71 ON- ENCROA CHMEN __ -J - - . �s.•wy 'a1 - s # - � a� .. �' `~sti ,. a2.. _ � ,_+ �i -r �.c.�y�_t. . < � _ � ,f � -.h` { r . ±.' a., uw ? <��_� a~�.. .t. i�.t � < ::s. y�•y +ice _ F:�� _�1 �c - -,!s?� _ .- :<<-��z� �4u �• ;a- � '� I. y-� .:Y� .}'.C•�Y..�,yrt..� .: -:4 '�:... -If � '`"�'' /i f ``�i i'r'+•k,!+t w. d'': A.. '+a•': } +'.w't ?° ,i-�a: g,!'f E `�• R *��a\`?ia��+`� i' .s. �.:y.. � iC a - �i. ^_- �`'�,`_ -. St -? Z.•F �l�a� •fit �`a4 ._4 � j•� ...°�.• _ - ��c- . -+•�T- T _ 7: ,�c.H S R • N 50 - Q EC,T[ :. O 527 ♦ . _ :"it�� r J i , r ' - .. > ti - • .. __ a_ - � '� } .,,. \ J - � yam'^ � .. ��-° a. �•� y� �✓ . '4\ � � ^•��r � � — 114.. - � � �'' a.'.� — -' "^"i JC -�f •�'.w q�P" , • _ i - ED C 3 > S e rt , W � � t DEVELOPMENT PERNIIT FOR THE HAYWOOD COUNTY FLOOD HAZARD AREA Development Permit Number 5ne O a Application Date -7--T-13 Owner's Name STaT,�� n!G G►l�s .ar� Address P . o . �3 e * W,9 R.o..t,gAk rim a7%D1 Telephone Building Permit Number f l�en�w S�aka,�, Cpl; --r Name �,(,r; I I AS S y e-,'c -45 Address 5 5 13ro" S T Askey; lte, Wc- a►wo I Telephone _R a.k - 3.5 2. - b5-75 Property Identification Number (PIN) $ Io 3 a - 4.14- 8 & 3 le FIRM Panel Number Zone Floodway Map Number Stream Velocity (fps) Cross Section 1. Location of proposed development: iai 2. Description of proposed development: New construction Manufactured Home Alteration of channel Filling Addition to existing structure Alteration or repair - if yes, answer the following: Estimated market value of existing structure $ Cost of proposed construction $ Park Model RV Grading Dredging If the cost of the proposed construction equals or exceeds 50% of the market value of the structure, then the substantial improvement requirements shall apply. Other (please specify) 3. Type of Construction: New residential Y_ New non - residential Addition 4. Size of Proposed Development: 5. Location within Flood Hazard Area: Improvement to existing structure Accessory structure Temporary structure Width of Floodway (Ft) on property _ (X Inside regulatory floodway limits Outside of floodway limits, but within flood fringe Inside flood hazard area where no detailed information is available (unnumbered A zone). Ground elevation Base Flood Elevation (BFE) Required lowest floor elevation Required flood - proofed elevation (if applicable) MSL (NGVD) 7. Required supporting documentation that must be provided as part of the application for a development permit: Yes No N/A Yes No N/A Yes No N/A a) No -rise certificate from an engineer if the proposed development is inside the floodway. b) Survey plat indicating ground elevations at four comers of existing or proposed building, base flood elevation and location of flood line. c) Building plans showing proposed First Floor elevation and any other necessary information. 8. Applicant has been made aware that within 21 days of completing the lowest floor, the surveyor must provide the Planning Office with an Elevation Certificate. Applicant acknowledgement: I understand that the issuance of this permit is contingent upon the above information being correct, and that the plans and supporting data have been or shall be provided as required. I agree to comply with all applicable provisions of the Haywood County Flood Ordinance and all other laws or ordinances affecting the proposed development. Applicant Signature 7J Date �M12 Date of Issuance -7 'g"13 By /Q- Continents: �-rt•Ga.ro. 2i- �Tora-6 R„ ••� � •+.c. G,C.GA W 1 -t-�.: � � t9 O � � fie.,' n •�. x'15 t � � y� n/�� n,Gt��.•c,l►w�,.a.,,i mecca. I h.r �-i ea- L-s Sr-s jskc!is Lo .'rt9 a FJ� -Apt Cass -sec—'y"_ _ 0 el -t is L we lr j 4 r-i' s far_ 'fda Approved for compliance by: Date of form: 1/6/97 Date 000 �0 HAYWOOD COUNTY PLANNING ANNEX II 1233 N. MAIN ST. 1808 WAYNESVU LE, NC 28786 RECEIVED FROM nol 001903 g 20 13 Amount Paid $ 15 b p D �aT 65(09,g3) STEEL BRIDGE STREAMBANK REPAIR PROJECT N__C WILDLIFE RESOURCES COMMISSION HAYWOOD COUNTY, NORTH CAROLINA McGill A S S O C I A T E S ENGINEERING -PLANNING -FINANCE 55 BROAD STREET ASHEVIL.I F, NC 28801 PH. (828) 252 -0575 FIRIM LICENSE # C-0459 PROJECT LOCATION: 35' 23'45.84" N, 82° 56' 16.30" W WAYNESVILLE w ( QUADRANGLE ; jiT16 ;r f'I'LE LIST r � n n w PISGAH d N1 A T I 0 d -L -F-0 R E S T. � r I F. LAKE PI3G. AAAH G PROJECT - F A, LOCATION . `7- L A �, BRIDGFi N r; m WEST FORK 6 IGEOAJ'Rp,ER Ag I ,z. PROJECT LOCATION MAP NOT TO SCALE M JULY 2013 SCHEDULE OF DRAWINGS G -001 ..... COVER SHEET / PROJECT LOCATION MAP C -101 .....EXISTING CONDITIONS C -102 ..... PROJECT PHOTOGRAPHS C -103 ..... STREAMBANK REPAIR PLAN C -501 ..... CROSS SECTION A -A AND CROSS SECTION B -B C -502 .... MISCELLANEOUS NOTES C -503 .... MISCELLANEOUS DETAILS PRELIMINARY NOT FOR CONSTRUCTION o:1z01z —1. --.i ana0,�o„g.�cr ino�..w,a,�c,,,,�n.,i R- 7- 122013 SUBM11-12.001 -1.-9. MSIGNAM BWO132:35M gas F> \m \\ {) ken \Q II ( § ) , §m )\ /§ ){ 2\ \$ §k )k CO/ { ! z O� \ m _ zz « E> n ix z kj §� \mz \\ kq § 7 ! \ ( \\}) ; >5� (} §0 3(;) M zx \ )� §j !`P $ o ]7 _� §) )\§( ca 0A (\( t' >dko %m §, )k2) 9\ ;q °� $ �§32 ;3!` )OM' )� §) >), 0c =;5 §§k �§/ ()) \/\ )k) G)z\\# )2 ]§ §4 9; e §'tI m$() ) �2 ;2 $ w ; \} / I, °m0q zex� / §/ [ (j /\ /0 )�\\ § \ §R§ G / \) , , \�\\ - /( }§§z `\ /( � UK u)\ Am! §§§ \ rn2 -q >q m JOB NO: 12.00140 DATE: JULY 2013 STEEL BRIDGE T PROJECT DESIGNED /� STRE&eBaNK REPAIR PROJECT`° m IIAL Q PHOTOGPHS DESIGN NC WILDLIFE FILE NAME RESOURCES COMMISSION ' Rc$N�xt7 m�oomu£t m�wgRO m � �/� ®® ENGIKEE!&LANINFl�c -___ _ NC_ P&__ __,_, 019019 113.m1.0 -BI•M &WpN0u1pn1CNNA•>Mp.' 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REVIEW. _ NC WILDLIFE RESOURCES COMMISSION ' ASSOCIATES FILENAME: FEE. `` ENGINEERING -PLANNING •FINANCE Bddg.DESIGN.dwg HAYWOOD COUNTY, NORTH CAROLINA 5513ROADMRM ASHEVUE, NC28801 PH.(828)252 -0575 FIRMUCP.NSE#C -0459 Ell I BARBED -WilE Fl PROPOSED ROOD RAL FENCE WFALL r WL FROM TOP OF PROPOSED SLiOFE BAONWU WIN COIPACTED FOR PLANING DN EACH I SEE OETAL SKEET 0-602 Ir TIP. 12' MNMNN ♦ ♦ ♦'�' eaumt -- - I •�� I� DOB'INO SIREAY CROSS SECTION A -A =loom FOR FO I1ISMIKIN BALLAST DOUBLE ROW of G'ABION BABID:TS DOW BARKED -M S PROPOSED WOW WL PENCE MALL r WL FROM TOP OF PROPOSED am BAC OU WITH oa1PAO7ED s011 ftb INSTALL DOUBLE u7rER SoL WIA L Sun HATM SEEDpq no LI1E.' m ANQS lu OEM GEDIDLIE.E, csES am o-am) 0 0 O WVm 14M APPROVED EO •�, FOR PLANING ON EACH EE11C11. CSI w N SEE arm SHEET' IC mNE. � X INSTALL NON-MOM L WITH I � Q i AFL COBBLE m % AL E r E APPROVED EQ NrDI -W7YBI F DESING FACED SLOPE F- Q v v SAL g g Lu o o M 7 ! - OVER BANK ZONE. "yam OR •?• COBBLE WIWN L�TO ALLOW W11ER 70 DRAIN ♦ ♦ ♦'�' eaumt -- - I •�� I� DOB'INO SIREAY CROSS SECTION A -A =loom FOR FO I1ISMIKIN BALLAST DOUBLE ROW of G'ABION BABID:TS DOW BARKED -M S PROPOSED WOW WL PENCE MALL r WL FROM TOP OF PROPOSED am BAC OU WITH oa1PAO7ED s011 16' OFPSE7 ♦� ♦ WA: 2ML13 DOSING STREAM CROSS SECTION B-B wmw" wm amr�m Lmm ofMEL 1. STONE BETWEEN 4'-B' N SIZE SHALL BE USED N NEW OABION WAU- I THE DOSING S7REA BANK WTERUL CAN BE USED AS OASIONN FU AFTER OWNS 6 RETIOVED. SUPPLEMENTAL STONE BETWEEN 4 -W N SIZE SHALL BE USED. & KABION BASKETS SHALL BE MN. 12 KAVOE PVC COAIED WIRE AND THE WE MESH SHALL CONFORM TO ASTM A-181L MESH OPEIONO VILL BE 3' X Y. 4. THE EXCAVATED SLOPE SMALL BE LINED WITH A NON-WOVEN OEOSIN nWW SUCH AS MOM 14ON OR APPROVED EQUAL S, BASKETS SHALL BE TIED TOGETHER VITH MOWN 3 TIES PER SIDE USNO MMRN 12 OAUOE COATED WM B. RESTORE STREAYBANK AS SHOWN ON PROPOSED REPAIR PLAN. 7'. BAC WU WHIN LOWER BANK ZONE 70 BE OOWMWTED USING STONE. EXCAVATED DEBRIS/WSTREAMBANK W7ENALS, OR CONCRETE BLOB( REWOVED FROM USOS GAGNO STATION. MID AND UPPER BANK ZONE 70 K 00161RUCTED USING COMPACTED CLAY. * BANK REPAIRS 70 BE BENCHED INTO EXISRNG FAILED SLAPS U pQz. a [-4 z I2' MNORm Q "Z .. VUzIg Day a� v —SWALL DOUBLE LAMM � Z NPAR 140" at APPROVED EQUAL Q z z o z wm Y ENNOA GDWT �� ar DOUBLE ROW OF H h W AM mrosw m WIA L Sun HATM SEEDpq no LI1E.' m ANQS lu OEM z csES am o-am) 0 0 O O •�, FOR PLANING ON EACH EE11C11. CSI w N SEE arm SHEET' IC mNE. � 0 — L WITH I � Q i AFL COBBLE m m W N _ 1 W Y ca NrDI -W7YBI F 16' OFPSE7 ♦� ♦ WA: 2ML13 DOSING STREAM CROSS SECTION B-B wmw" wm amr�m Lmm ofMEL 1. STONE BETWEEN 4'-B' N SIZE SHALL BE USED N NEW OABION WAU- I THE DOSING S7REA BANK WTERUL CAN BE USED AS OASIONN FU AFTER OWNS 6 RETIOVED. SUPPLEMENTAL STONE BETWEEN 4 -W N SIZE SHALL BE USED. & KABION BASKETS SHALL BE MN. 12 KAVOE PVC COAIED WIRE AND THE WE MESH SHALL CONFORM TO ASTM A-181L MESH OPEIONO VILL BE 3' X Y. 4. THE EXCAVATED SLOPE SMALL BE LINED WITH A NON-WOVEN OEOSIN nWW SUCH AS MOM 14ON OR APPROVED EQUAL S, BASKETS SHALL BE TIED TOGETHER VITH MOWN 3 TIES PER SIDE USNO MMRN 12 OAUOE COATED WM B. RESTORE STREAYBANK AS SHOWN ON PROPOSED REPAIR PLAN. 7'. BAC WU WHIN LOWER BANK ZONE 70 BE OOWMWTED USING STONE. EXCAVATED DEBRIS/WSTREAMBANK W7ENALS, OR CONCRETE BLOB( REWOVED FROM USOS GAGNO STATION. MID AND UPPER BANK ZONE 70 K 00161RUCTED USING COMPACTED CLAY. * BANK REPAIRS 70 BE BENCHED INTO EXISRNG FAILED SLAPS U pQz. a [-4 z I2' MNORm Q "Z .. 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