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Home My WebLink About20181666 Ver 1_940278_Final Permit Drawings_20181210N (N.T.S.) � �`•f �� I F �. ��. ��: . i Lat: 36.169204, Long: -81.646653 . _ 1^lT��1��E9stTsrrssass . . *�i. • � �j i 1 } ~ -�. &'�'lestsm rJ.v. R9il•�9� L�wm�tir�s �'}'. . � • ,J. � `�.�.s �1c 199c Sg + {�. � .: 'C • �. �. �� 4 �_ t . J _ _ -I �#Y� '�2+.,. , . . . �,, . . �` , ��:;��:� , ��-�,:x�� ; : �.{ . ,r� �.x , 1� ' { ..,� ,.�1� ��'�` fi� � . �+. ., �� = / + . � : r . � ��~ Q W ;�� • � Y' � � � " } f. � + �� o � , � ..-`"'+ �' r A W 2 '` �;' . }� � �� " � � Y � �.Si�Fr.uch�� c.rvhill �� ' � � Q � . FvL�x . � . '-rP' � ..pT �L �- � � � � � ��t} �� ' R i ` � , , ' ' • r 7 "}.. �� •�� ; - r �' i� � ?ri � �� *u�� -,� � , f . � -.� * � i *� � � � i � . � � � r. �� 3 �i �r �-�} � � + �� . � � . � r �} ��' e ' � �+ ' , � �� . } � �� I� � �.'I � , 4'�'� ' � r�� , } {Y4�� • '^� � , � } � �, �+� , , + � �� -� � � , O � i. � � � � : : . �= _ � ,�' � � � � �:+ � �r L .r��' . � � ;' r =�� y ;��:. + _' �� /�� +f � y.,l}_J' , I`'� / � '1 ry� �� J _ i!: v� �� ' ,/, f / r k n t� � , � ff f " �'j�J� � ��' '`` � M � ;':' .� '�'; � ' .i F� �! #� � � _ �. _f�n. .�� '}4"F. . �ITy � Y � S �� .J.��' .�F. �� ir � �� . . u ' 1 ' � f� �� *� � I +1 � r � �:��ta��' h4� { � s� . � � .� -�� +� . � ". �:��; _ � .��7�:� fr s � . �% ��f � �,i ,� �}i '. �� ` '+ � ' �i 1 � ' ' }�^'{ :�. �_ �T��?�� U �� ,_ F��-� }. 7Y�. � - +' � ' ' `� . � � r �-y� , � �1!':.�{ o. � . �,� 1 +�'F �T'4i �7?i�� 'rx.'�'�� y� Trout Streams� �ry ' ,�� ' �,_�w�� #�*�� 3:,� }�F� " -� . ,, ;.. . ..r ti { F v.} � r /. ; y'..f .:� _'iy�'�.� '' 1. t-Tyi- __ `i: � , �f ��y.'��., ti.,�y��h�• r�f �,��t yr . i� ��+� . _:i i V � .. �� Kb. � �': T 1�°�+A TA U � A . ,..,�,,,,:.•. � �� . f �f'a ` 1 • f�{�' *}� f � ` ' � . ��.'r � .€. I }{�R� ��' L��••S,,�� , r� � � I, � � �r - . �_�� '� F � _ � �'� s � l' . � ��. k ��.i�� _ . �� r; . �� `'� '� � _ � . �: x� a ..,- r.f � J�� Beech Mountain � UGA ' 2G� I � � ti - , ..� , � .- kl . / s Year 7 Express - Division 11 WATAUGA .. • ` � �a� COUNTY BRIDGE940278 TIMMONS GROUP VOUR VISION ACHIEVED THROUGH OURS. WETLAND AND SURACE WATER IMPACTS SUMMARY Hand Existing Existing Permanent Temp. Excavation Mechanized Clearing Permanent Temp. Channel Channel Natural Site Station Structure Fillln Fillln in Clearing in SW SW Impacts Impacts Stream No. (From/To) Size / Type Wetlands Wetlands Wetlands in Wetlands Wetlands impacts impacts Permanent Temp. Design (ac) (ac) (ac) (ac) (ac) (ac) (ac) (ft) (ft) (ft) -L- 13+03 LT Temporary Dewatering 5 -L- 12+75 to 13+35 LT Rip Rap Embankment 25 -L- 12+76 to 13+03 60" RCP 40 -L- 12+76 RT Temporary Dewatering 34 -L- 16+62 LT Temporary Dewatering 60 -L- 16+55 LT Bank Stabilization 25 -L- 16+55 LT Retaining Wall 25 -L- 16+39 to 16+g5 3@ 14' X 12' RCBC 73 -L- 16+55 RT Bank Stabilization 50 -L- 16+80 RT Bank Stabilization 10 TOTALS*: 248 99 0 *Rounded totals are sum of actual impacts NOTES: Existing Bridge is a single span at 45.5' and 29.5' out-out. Proposed 3@ 14' X 12' RCBC is approximately 73' with a slope of 1.00%. Existing 60" CMP at 34.5'. Proposed 60" RCP is approximately 74' with a slope of 0.78% 8 trees will be cleared as a result of the proposed improvements. 2018 Feb ��) - . . .�� . .�� I � \ , BASE /4' BR/DGE N0.:940278 N� ,� . .- - oErAi� A RlP RAP EMBANKtiIENT dya �o scoie� l0' min, l' min, GEOTE,. , ,�� LlIyER Type of Liner = CL ll R/P RAP = 1.200 TOIyS Geotextile = 1.600 SY FROtiI STA. 12+75 TO STA.13+35 LT FROtiI STA. 16+20 TO STA.17+03 LT FROtiI STA. 16+25 TO STA.17+04 RT � � • • - �� . . , , � DET AlL B INLET CHANNEL /MPROVEMENTS LOOKING DO►HNSTREAti1 fNa to ScoieJ FLOODPLAIIy BENCH �/ RlP I�AP CLAS ll (TYPJ Excavar�oN (TYPJ N� � �_--- 2:l fTYP.1 l' BEL BENCH lTY .) l' BELO� STREA�BED (TYf'J BASE /4' CROSS SECT/ONAL V�EW PORT�ON OF�NGEOTEX�ILE LINER l'min.�� OW FL N� GEOTEXTILE LINER FILL �/ NATIVE tiIATER/AL EXCAVATION (TYP.) 2' SILL FLOODPLAIN BENCH PROF/LE V/EW DET AlL C OUTLET CHANNEL /MPROVEMENTS LOOKING DOWNSTRE,4til fNd �o ScoieJ FLOODPLAI�I BENCH �/ RlP I�AP CLAS ll (TYP.) ExcAVArioN (TYP.J N� � �___- 2:l fTYP.J l' BELO BENCH (TY .) l' BELO� STREA�BED fTYf'.l PORT�ON OF� GEOTEX�ILE LlIyER x FLOODPLAIN BE�CH W/ R/P RAP CLAS ll (TYPJ N� � � l' min. FL� EXCAVATION � fTYP.I GEOTEXTILE L/NER FILL �l/ NAT l�/E MAT ER/AL 2' S/LL FLOODPLAIN BENCH PROF/LE V/EW xS/LL LAYOUT T HROUGH CULVERT PER DETA/L E CROSS SECT IONAL V �EW DET AlL E S/LL LAYOUT DET A/L UPSTREAM TO DOWNSTREAtiI flyol b Sco�eJ � �--- S/Z NG DET �L DLL �--- l' LO�G S/LL NOTE: PLACE SILLS AS THREE BARRELS SltilILAR lN SIZE SUBSIDIZE WITH � ---- SHO►�lN ABOV E. BACKFILL ALL W/T H NAT lVE BED MAT ERIAL T 0 CLASS 'B' R/P RAP. CLASS 'B' R/P RAP /F NEEDED. PLAN VIEW N� - _� y��NGW ALL 2:l ITYP.J R/P RAP CLASS ll W/ GEOTEXTILE FABR/C ITYP.J = FLOODPLAIN BENCH �/ RlP RAP CLASS ll l YPJ W INGW ALL . , , . � �. . � � � .. . . . - ) �, - � . � , . � DET AlL D S/LL S/ZING DETA/L INLET �� ND��OUTLET /2' x3.5 x�� 2:l ITYP.J RlP RAP CLASS ll y�l/ GEOTEXTILE FABRIC ITYP.J CROSS SECT/ONAL V�EW l' 23'8" 23'8" 23'8" l' Fll l lTYP 1� � �u i irvn � . . ( , � VAR. CONSTRUCTION ACCESS ROAD A A CROSS PIPE(S): SIZE DETERMINED BY CONTRACTOR �• � 0 STREAM CHANN CLASS B STONE PLAN VIEW 12" MIN. NATURAL GROUND >��i� i 10:? 6" #5 OR #57 STONE IN ACCORDANCE WITH SECTION 1005 OF NC DOT STANDARD SPECIFICATION CLASS B STONE #5 OR #57 STONE, 6" DEPTH (MIN.) NATURAL GROUND yo:r i,./i�/i,. i��/i��/i��/i CLASS B STONE CROSS PIPE(S) (SEE NOTE) GEOTEXTILE FOR DRAINAGE VAR. SECTION A-A NOT TO SCALE NOTES 2- 60" CMP REQUIRED TO PASS 5 TIMES AVERAGE DAILY FLOW (ADF) \ ' • \ ' � . � . . �� z � � I--I � � Q a H�C=rjV LLJ�Hz oo�= � z ^ QU��H u��~Ow 0 � � � Z H D � H W � � 0 V � Z 0 H LL N z � H � Q v o � � W � � � r z N Q � � � � Q � � � � Q � °C W r 1645.01 nTnr n �■ n n �iv USE N0. 5 OR N0. 57 STONE FOR SEDIMENT CONTROL STONE. PROVIDE STABILIZED OUTLET TO STREAM BANK. WOOD PALLETS MAY BE USED IN LIEU OF STONE AND GEOTEXTILE AS DIRECTED. A SUFFICIENT NUMBER OF PALLETS MUST BE PROVIDED TO ELEVATE THE ENTIRE SPECIAL STILLING BASIN ABOVE NATURAL GROUND. NOT TO SCALE z o� H � � Q Q H�(,=�U LLJ�i--iz 0 � � _ �Z ^ Q U � O H � CAH�OJ O � U� a Z i--i � � � H W � � 0 � Z � � LL y � Q z m H Q � � Z � �..� J � J � ~` z r Q y � � J Q �"� � V � W a a � V+ SHEET 1 OF 1 1630.06 Project Description Friction Method Manning Formula Solve For Discharge Input Data Roughness Coefficient 0.045 Channel Slope 0.00700 ft/ft Normal Depth 5.00 ft Left Side Slope 2.00 ft/ft (H:V) Right Side Slope 2.00 ft/ft (H:V) Bottom Width 5.00 ft Results Discharge 405.83 ft'/s FlowArea 75.00 ft� Wetted Perimeter 27.36 ft Hydraulic Radius 2.74 ft Top Width 25.00 ft Critical Depth 3.74 ft Critical Slope 0.02488 ft/ft Velocity 5.41 ft/s Velocity Head 0.46 ft Specific Energy 5.46 ft Froude Number 0.55 Flow Type Subcritical GVF Input Data Downstream Depth 0.00 ft Length 0.00 ft Number Of Steps 0 GVF Output Data Upstream Depth 0.00 ft Profile Description Profile Headloss 0.00 ft Downstream Velocity Infinity ft/s Upstream Velocity Infinity ft/s Normal Depth 5.00 ft Critical Depth 3.74 ft Channel Slope 0.00700 ft/ft Bentley Systems, Inc. Haestad Methods SolFri.ahl�eFteNMaster V8i (SELECTseries 1) [08.11.01.03] 11/29/2018 10:40:21 AM 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 Page 1 of 2 BR/DGE N0.:940278 . , � . ) � � , . � . . 2 - 60" Temporary Pipe Project Description Friction Method Manning Formula Solve For Full Flow Capacity Input Data Roughness Coefficient 0.013 Channel Slope 0.00700 ft/ft Normal Depth 5.00 ft Diameter 5.00 ft Discharge(one pipe) 217.89 ft'/s Total Discharge (two pipes) 43578 ft'/s Results Discharge (one pipe) 217.89 ft'/s Total Discharge (two pipes) 435.78 ft'/s Normal Depth 5.00 ft FlowArea 19.63 ft� Wetted Perimeter 15.71 ft Hydraulic Radius 125 ft Top Width 0.00 ft Critical Depth 4.19 ft Percent Full 100.0 % Critical Slope 0.00673 ft/ft Velocity 11.10 ft/s Velocity Head 1.91 ft Specific Energy 6.91 ft Froude Number 0.00 Maximum Discharge (one pipe) 234.39 ft'/s Maximum Discharge (two pipes) 468.78 ft'/s Discharge Full 217.89 ft'/s Slope Full 0.00700 ft/ft Flow Type SubCritical GVF Input Data Downstream Depth 0.00 ft Length 0.00 ft Number Of Steps 0 GVF Output Data Upstream Depth 0.00 ft Profile Description Profile Headloss 0.00 ft Average End Depth Over Rise 0.00 % Bentley Systems, Inc. Haestad Methods SolFri.ahl�eFteNMaster V8i (SELECTseries 1) [08.11.01.03] 11/29/2018 70:41:27 AM 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 Page 1 of 2 Culvert Diversion Channel V V� VLI.JII�ILIY 1 VVIY 1 11V� v � v�� GEOTEXTILE FOR DRAINAGE NOTES PROJ. REFERENCE NO. SHEET NO. 17BP.11.R.182 EC-8 ��° ��w��v� �]H]E]E�]C 1� �]F �� 0 � � Q� � �� — U O �� N i� \ I� � �� \�O N � n%-j � � NoTEo / BYPASS PIPE SHALL � � BE ABANDONED lN / / PLACE ONCE T HE / � ,� PROPOSED 60" RCP / / INSTALLATION lS / COMPLET Eo / � e / / / �� / � � ti � / 0 / � / ,,, i �I � / ii � / � �� l P IOUS � / _ II M �V � _ � — � / DIKE �� II i� � I = / /� / _ �� /�� \ / \ \ ,� � / // H B � HPB = \ // ~ � — — � _X �� -- _ � -- _ X - -� - -_ _� ��-- C -- X J — I I 24" BYPASS �-1 x PIPE � I� � � � ti�0 X II I � �� X II I I N X N � 11 � �� Q� �/� �� S ^ �� I , � / m I �� ii � ; I I ^I � m I I � i ` �� m I I I I I I m� i .I � m - I I � �- - — � i ' N � m : L 0; � - � �� ,yl� /� �x � �;N I � � � � � m ��e�� m m �� ,� �� `� g>� 1� �, � / �ti o � ,� x � � , / ., , I I I I I I J� �� II �I �� I I II I I II �I II I I I I �� L / `i - � � � � � � � � � �� i � IMPERV IOUS I �I DIKE � I �I I► �� I , � � I I I I �I � � 1 � Cm _� T URBIDIT Y � � CURT AlN I I(ANCHOR AS NEEDED) � � , Ili � m I �, � � N � �` N ��/1 N � �o �� m Z� 0 �p. i- i �� ~I II m I j II � �� ►II I ► �1 II m, �II I � II � 'll o I � "I II � I m �, I, � � I I I.I I I �IMPERVIOUS DIKE I I I —��__ � � �,, � �� , , �_ � �� _ / �I� I �� / ( / �� I �! i � / � m m , � � I I N mll m � I ► ►� �, I ► �� il � I N m� i �� ,�� IMPERV IOUS II DIKE I I II II II ��I II II� II WORK (THIS ARE A PHASE � CULVERT DIVERSION CHANNEL TYP/CAL SECT/ON ---_T� --_ .� ----------------- .�-- 5�" ��' 2�� , �• l ` �' . , •. _ I-5'x—I GEOTEXT/LE LINER x MiN. o��1ENs�oNs sHoy�rN CULVERT PHASING NOTES: CONSTRUCT TEMPORARY DIVERSION CHANNEL AS SHOW N UTILIZING IMPERVIOUS DIKES UPST REAM & DOW NST REAl�1 OF PROPOSED BOX CULVERT S. UT lLIZE BYPASS PIPE AND lti1PERVlOUS DIKES AS SHOW N FOR 60" CMP REPLACEMENT. BEGIN BUILDING 60" RCP PIPE AND BOX CULVERTS (BARRELS l9 2, & 3�e SHIFT T RAFFIC T 0 ON -SITE DETOUR AS SHOWN ON SHEET T tilP -4. BUILD REMAINDER OF 60" RCP PIPE AND BOX CULVERTS IBARRELS l, 2, & 3� AND BUILD ADJACENT UPST REAM & DOW NST REAti1 W INGS. il � I I � � I � � � I I II II I� � � I I� � � �� II �I I I CUL�ERT— � HA S ON J C NNE� - - �� I m� � � I' .//-� m I I� I � I� —F m _ _ _-- - << ` x UT/L/ E SPEC/AL -I� ST/ L/ G ASIN FOR DEy�A ER�G �IORK S/TE. C � � Q 0 � a E � +� � o �� N + � i� �� N�— \ L(� � CO�N - � /' / /� � • � I I � � � �Q . , j � I � , I � � I � �� 1 O / I I (n � o(n --- � / � I I o0 u �r , A/ I 7c m / ` I I m O \ / � � �� 5 I I � , � � � I �I �� 5 � I � � � � Q / I I . _, � I I �� I � ,� �I I PHASE lA T RAFFIC CO/V T ROL DET AILS � / � I I � � � � � / � / -- . / I i�° I I i ��. -- ► I � I ► I ` � I I N / � ( � \ i � � I I ,,. � I I i ,, I I �I I I ,, I \ / � , � ,; �� ii , , � � � ► � � � i ,, - I I � � I � __ � ,, � � � , _ _ II i I � _ . _ � II —� � _ , I � , � _ I I � ,, I � � �_ I / I ; II � � _� �� ,, � I � �� I I I � � y /� (/f I I � � � � � 2 I � � / �� I � — � I I � � I I , r � I �I _ , , I I �- — / � I I I � � % I I I II � m,�\� � . I I II _� HPB H = \ I LJ HPB � PB � I I ,� I � ) o � . �HPg/ S� _ — \\ I • A � HPB HPB ?— X X — — � I / \ r-=X� � ---- � I I // _� � � �� l -_ �x_ _ - _ � 1� • �-s • �� ---- _ J � �� = _ - -�X�x X � � � � � � �-� � / °fl N ,I N — X � � � � ��/ . � � � � � X — J � - �- -�► •- � �- - X —� L �`�0 C — — _ � _ � � �` � � � � J L � --�-�-_ �► � X rl �� <� � I� � X �� v+�� I � ` v�o � � � �� II �� X �� —� � X ► —C X � �� --� � � � � � � ��' �, � � � � ) X � � I � � � � �� / � � � � � / � I `` N ` I I % k/ I I I � X � I I � oocn N � I I pr I I / I I I I Zo \ I i � . , I � I I , I I m-� � � / � \�—�/ �/ / �� ,S�S � � e / / / PHASE lB T RAFFIC CONT ROL DET AILS � / � / / �� / � i� / � � �'�' � / % ( � � / � ,,,/ / % I I I \ �� / / �/ / � � � � / , I Q , I I � \ � /� �/ I p�e !22 � � � II / PiS►o i2f3�b7 — —6� � � � �� • I � I �. ��' I \ � � �`_�� / / /� I : \ � �» �� // �r I �\ \ a /� (/� I R e I _ � � , o o � _ / ,, � � �- � ,, � I - � � ii `� ��p I �- _ \ \\ /� Q �02P* �t[Tl � m � ` � �' I /�� R e I HPB '� ` /2 _ HPB �� HPB � \\� \ // �' � ,S/ — �-1P8 S � — � I• I I I I I I I R11-2I I 4s�� x 30C� � CLOSE TYPE III BARfiI�ADE � HPB HPB — — — — — DRAi � �� X�—X � b � �� ` �,--� X - X� �- - �• rR,�F ,FT '' r - - - - - � � �— — � -�- s�a„f�o -12- �► � =X X X —� ~ �\ S �'� E � � — � X � � � — — X X � J � _� -- --- s �� IR11-2 � II �_ I�� 48" x 30" /� �� I X X ROAD � �y � � r I I CLOSED / � � �' � I Wi -6L� I I ��1� I I � q �� I X d � I � X I I TYPE III BARRICADE �� I � / I I I I / NOTE: SEE SHEET 5 FOR PROFILE OF PHASE lB T EMPORARY ROAD. g�� I I / // / I I � x / �� / ` . �� I I I I I I I I I I I I � W1-6R 48" x 24" I � I � I I I I I I I I I I II �� ' I � II I � L �` (� a o t�Y z� r �m z � mo �A � �� <o m� , � � i ` N � �� ` � i II � I T I I � I I I IPi Sio� LJ I I Q■ '� �fLT) I J ' ' I ■ � / o � ' D ��`-�12.fi ■ I . � . � / l� I I R e I / l ��- J �� = �� (I � ` ` N N ` �� A �� E D TRAFFK Sll/FT � — � '� I \ '� -�- � f � - A � J � � • �� -- - � � � <� R1I1- � _ 48�� L. ��, � � �x � —i I I I I I L TYPE II 0� D � \ � ,OS D W1-6R �j 48" x 24" I �II AI�RICADE I I I I I I I I I I I I � I � i I I II I APPROVED: DATE: SEAL i �� ~I III ' � II � � �� I�IIi �.II � �►�II I II I � mlll � ,. � �\� o� � ►� ► I I i �� , il �1 I � I � I � I II I �I II I I I III � III H I•II I I .. E�� Timmons Group, Inc. (NC G1652 e 1001 Boulders Pkwy., Suite 300 T I M M O N S G RO U P g04 200-6500 Timmons.com YOUR VISION ACHIEVED THROUGH OURS. � � � ' �� I III �I �� ,� I� I�I � � �� , -- -- �, �„ � �,� �a �� \ � �� = — �� _ �� - / II o, , I ��I I •�, \ • I�I, � �III � ��, � I I I l� II I i II� � II I III � II� II� ill II �� II � IIII I III I III III I - I I III I II I� III I I II �Ili� _, .,, �� //� �� \ I � II I � III I i III I � IIII IIII DOCUMENT NOT CONSIDERED FINAL UNLESS ALL SIGNATURES COMPLETED � ON o F y�G � NORry y \5 OF �,y �L : .�� '�o -v O ��- � �. cr � 2 � � � � 0 � m o � O v � O � �� - � � �F oe- � ti TRPN e G� l� r o F s �F rRAFF`G � � , ,, �� _ / � -�--- � �i PROJ. REFERENCE NO. SHEET NO. 17BP . 1 1. R. 182 TMP - 4 ��I� ��w��v� �]H[IEIE'][" l�i �]F 14 R11-2 48" x 30" � ROAD CLOSED TYPE III BARRICADE �R�O Z�� N g3 NP Np0 R11-2 48" x 30„ � ROAD CLOSED �R�O 2�p N a� NP Np0 TYPE III BARRICADE / / / i / / / .2$Q> �:.,—..,4 �� E ll�;h�t'<n' North Carolina Department of Transportation �'�_ �,�c�r��z�w-arc•r 1�lEI��[][�lI" ��A�VI[�T�'u ; r , . Highway Stormwater Program �' STORMWATER MANAGEMENT PLAN �� ' �� =�:=. (Version 2.07; Released September 2016) FOR NCDOT PROJECTS WBS Element: SF-940078 Proj. No.:17BP.11.R.182 County(ies): Watauga Page 1 of 1 General Project Information WBS Element: SF-940078 Proj. No.: 17BP.11.R.182 Project Type: Replace Bridge w. Culvert Date: 8/15/18 NCDOT Contact: Marc Shown, PE Contractor / Designer: Blythe Development Co. / Timmons Group, Inc. Address: 1590 Mail Service Center Address: Raleigh, NC 27699-1590 1001 Boulders Parkway, Suite 300 Richmond VA, 23225 Phone: 919-707-6751 Phone: 804-200-6500 Email: mshown@ncdot.gov Email: Nick.Soucie@timmons.com CitylTown: Blowing Rock County(ies): Watauga River Basin(s): New River Basin CAMA County? No Wetlands within Project Limits? Yes Pro'ect Description Project Length (lin. miles or feet): 0.112 Mi. Surrounding Land Use: Tweetsie Railroad Theme Park, Rural-Residential Proposed Pro'ect Existin Site Project Built-Upon Area (ac.) 2.25 ac. 2.25 ac. Typical Cross Section Description: Ex. Road: 30' two-lane road with steel rails. Irregularly shaped stream bed, existing steel and timber bridge with temporary crutch Prop. Road: Three 11' lanes with 6' paved shoulders, guardrail, 3' graded shoulders, bent in center of channel. and maximum 6:1 fill slopes on either side. Annual Avg Daily Traffic (veh/hr/day): Design/Future: 1,500 Year: 2016 Existing: Year: General Project Narrative: (Description of Minimization of Water Express Design Build Bridge Replacement Project. Replacement of one bridge (46' long with timber plank floors on I-beams and timber vertical Quality Impacts) abutments) in Watauga County. Removal of existing bridge and replacement with triple box culvert (3 @ 14' X 12' RCBC). Proposed road alignment, typical section, and grade to be modified (per Contract Documents) within existing impervious area resulting in negligible increase in impervious area and thus negligible water quality/quantity impacts. Proposed roadway is to be re-aligned 140' +/- downstream of existing roadway. Opportunities for treatment were utilized to the extent practical within the project constraints. Culvert(s) designed with sills/floodplain benches to maintain buried culvert depths and promote stable crossings. Culvert inverts to be backfilled with native materials. Storm drain outlets redirected from existing stream bank into proposed culvert wing wall and rip-rap protection to prevent erosion of existing stream. Greenway constructed within third barrel with remainder of alignment set to avoid impacts to JS to greatest extent possible. Waterbody Information Surface Water Body (1): Middle Fork South Fork New River NCDWR Stream Index No.: 10-1-2-(6) NCDWR Surface Water Classification for Water Body Primary Classification: WS-IV:+ Supplemental Classification: Tr Other Stream Classification: None Impairments: None Aquatic T&E Species? None Comments: NRTR Stream ID: Buffer Rules in Effect: Trout (Tr) Project Includes Bridge Spanning Water Body? No. Deck Drains Discharge Over Buffer? No. Dissipator Pads Provided in Buffer? N/A Deck Drains Discharge Over Water Body? No. (If yes, provide justification in the General Project Narrative) (If yes, describe in the General Project Narrative; if no, justify in the (If yes, provide justification in the General Project Narrative) General Project Narrative) D � � m Z � X r I li�;kl11'�!y' North Carolina Department of Transportation � 5tcsr�l��vatc'r 1�1E��'1[" �]]l��W��T� , �� • � Highway Stormwater Program .�-"I STORMWATER MANAGEMENT PLAN `��' �' � 1� ��' 1� :;,,�`��` (Version 2.07; Released September 2016) FOR NCDOT PROJECTS WBS Element: SF-940078 Proj. No.:17BP.11.R.182 County(ies): Watauga Page of 1 Bridge to Culvert Avoidance and Minimization Proposed Structure Summary Sheet No. & Station Sheet No.: 05 Station: -�- 16+62.00 Number of Barrels: 3 Drainage Area (ac or sq mi): 8.49 sq. mi. Barrel Width/Diameter (ft): 14 ft Surface Water Body: Middle Fork South Fork New River Barrel Height (ft): 12 ft Culvert T e: 3@ 14' X 12' RCBC Culvert Length (ft) 56 ft Avoidance and Minimization Efforts: Culvert location and size per contract documents. Culvert Avoidance Minimization Design Guidance was used in designing the culverts. New location of (Bridge to Culvert) culvert(s) were designed with sills/floodplain benches to maintain buried culvert depths and promote stable crossings. Culverts are to be backfilled with native materials. Where applicable, storm drain outlets were tied into proposed culvert (wing wall) to prevent erosion of the existing stream. The existing bridge on Tweetsie Railroad Lane will be removed and the natural floodplain is to be restored. Alignment of trail chosen to avoid JS as much as possible. Stream Slope Fish and/or Aquatic Life Passage Existing Average Stream Slope (°/a): 1.0 % Existing Low Flow Channel Dimensions Pro osed Culvert Slo e%: 1.0 % Triangular Shaped Stream: P P�) in the Stream: Culvert Burial 0.95 ft depth 22.95 ft top width Proposed Culvert Burial Depth (ft): 1.0 ft countersink Existing Streambed Material: Natural bed material Proposed Low Flow Dimensions Through the Culvert: 14' X 1' Proposed Sills/Baffles: 3.5 ft sill on left barrel 1.0 ft sill on center barrel Existing Low Flow Velocities in the 2.0 ft sill on right barrel 1.43 ft/s Stream (ft/s): ropose ow ow e oci ies roug 1.37 ft/s the Culvert (ft/s): Alternating Low Flow Sills/Baffles: None required. Culvert/Stream Alignment Stream Patterns Upstream and Downstream of the Culvert that Could Affect Fish None Passage and Bank Stability: Bed Forms Impacted by Culvert (riffles, pools, glides, etc.): This appears to be in a riffle section of the stream. Low Flow Floodplain Bench Required? Yes Low Flow Bench provided to ensure passage of aquatic species, specifically (provide justification) within Trout waters. Bends at Inlet/Outlet? Culvert located in generally straight section of stream and therefore passes (describe culvert alignment with stream) None stream in straight channel - no significant bends at inlet and outlet. Stream Realignment Necessary? (provide justification) None Bank Stabilization: Rip rap to be utilized to stabilize the bank upstream and downstream of the proposed culvert(s). Stream banks adjacent to the existing structure being removed shall be re-graded and stabilized as necessary. Outlet Velocities Natural Stream Channel 2-yr Velocity (ft/s): 3.08 ft/s Natural Stream Channel 10-yr Velocity (ft/s): 3.08 ft/s Proposed Culvert 2-yr Outlet Velocity (ft/s): 4.25 fUs Proposed Culvert 10-yr Outlet Velocity (ft/s): 8.42 ft/s Roadway Geometric Considerations Evaluate/Describe Roadway Geometric Constraints: Roadway geometry per Contract Documents. D � � m Z � X r