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HomeMy WebLinkAbout20160692 Ver 1_Powerpoint_20160405�, 'ar, ��-wi '•''�_-_ -•; t�>� 10�`�1/`.'+1v 4'i �K.'FJ it+ ° �_'t+��.'-""Ii4M. ' -7•�a -"'4�r�''=S �.. _, : "` , _ _ 'i!��- ' [-�,,,,, � � T •��, s �. a t�` ,� mss= r ti's A'�i 1 ., t �' - .{,h, •#,� -. _ � -::.. - . - r: - ; .r. �. � ?r-�-.i_`i:i� . � . #t�l. _ I� , -ti J .. d �:�ir _ vx �- NO,� T' Y At .j, a - . t _� . � ��, �� .. `-' _ r t� - is `� _'��'• � • `+�„ + � - 40r ti INS Features of Main Dam Temporary Raw Water By -Pass Conduit Extension and New Vault Utility replacement Interconnection between mudline and raw water line Intake Tower Platforms and Ladder Intake Tower Flood Proofing • Seismic Stability Berm Drainage/Seepage Collection MSE Wall Near Clear well ■ Parapet ■ New Electrical Power Feed on Crest Instrumentation Principal Spillway Modifications rk Improvements rise Dams Four Feet F�' a-. r :•.'syr .d` � '�' _ + TO Main dam — sheet piles Saddle dam - earthen Main Dam - Parapet o r s Main Dam - Parapet (r/r✓rflfllli -25 'IIIVII'+IIIIdi I I I I I ?I I!+ I f +, flf+rrr!}}Irl rlrrrrrrr4r ijyrrry} r, 0 25 50 75 100 125 150 A MAIN DAM SEISMIC STABILITY BERM SECTION gI�ALE; l-2& AT STATION 6450 0 20' 40' 2554 rA l 2625 175 91-RNETT rte.. RESERVOIR SHEET PILE RAPET WALL EL _ 2616.5 EXISTING GRADE _ + EXCAVATION 8 -IN MIN SEISMIC STABILITY BERM y j 1 = e 2 s OUTER C ORE INNER CORE �.� M$E WALL f J EXISTING OUTER SHELL _ ROAD CORE — — — MATERIAL (r/r✓rflfllli -25 'IIIVII'+IIIIdi I I I I I ?I I!+ I f +, flf+rrr!}}Irl rlrrrrrrr4r ijyrrry} r, 0 25 50 75 100 125 150 A MAIN DAM SEISMIC STABILITY BERM SECTION gI�ALE; l-2& AT STATION 6450 0 20' 40' 2554 rA l 2625 175 91-RNETT rte.. RESERVOIR {" North Fork ImprovementS Seismic Stability Berms a Main dam — soil fill ;� Saddle dam — rock and soil fill Jfffi Main Dam - Seismic Stability Berm B D 600 5+DO 4+00 9-00 2+DD 1+90 D+00 -1+00 -i+DJ 6+41 9+06 6,W 4+00 3+00 Z+oO '+C:1 c -Do STATION � MAIN DAM 5E15MIC STABILITY BERM SECTI(]N PROFILE VIE''V RLONG CDN UUIi CENTERLINE RLIG Nl.I ENT SC4LE 1� 0 4b' 9C I -11 E E6.OD' 156: EXISTING INTAKE TOWER. 12.OD' SNEE7 PILE EXISTING GiiAbE PARAPET WAU EL 2616.5 SEISMIC STABILITY BERM ✓- \T 2.5 EXIN MINCAVATION 11 8• INNER. CURE iL LOW4-ERMIASILITY 3 SEL 2S49,S EARTH FILL (SFE NOTE 1) EXISTING SHLLL OUTER SHELL -EL 25259 ROAD MATERIAL OGRE GORE MATERIwL �1 — td.0(Y E%IS r IN VAULT pRUPOSfO VAULT LOCATION 6+41 9+06 6,W 4+00 3+00 Z+oO '+C:1 c -Do STATION � MAIN DAM 5E15MIC STABILITY BERM SECTI(]N PROFILE VIE''V RLONG CDN UUIi CENTERLINE RLIG Nl.I ENT SC4LE 1� 0 4b' 9C I -11 Main Dam - Seepage Collection t �! 257.9 LF 61N SLO I I EU � f NALL PVC COLLECTOR PIPE LEFT SIDE TOE BRAIN G ~� ! P I,r rJ � s -112 EXISTING GRADE 5 E%IS TIAG. CONDUIT VAULf�3.'P i SEE N07E3 C MR. - LO. dFERASIASILITY n e d �y y-x�'j. ' +� + 35P LF 6 -IN SLOTTED— EARfh1FILL {SEE NOTE'j bA p{ - Ff��'�� T `� �i.� WAS I PVC 001 I FCTOR 4 F : i F�N'� ., w � 'Li ALL DRAIN FILA INS TQP OF FINE GRAIN FILL `- PROPOSED SEEPAGE MONITORING VAULTS BOTTOM OF FINE PROPOSED OONU IIT VAULT DRAIN FILL yYY � � 111yy i I �-�--� J _. ❑ —7 . •.. 430.25 LF 6IN SLOTTEDL WALL PVC COLLECTOR PIPE RIGHTSIDE TOE f f� PRDP45ED MONITORING LAULT LO�"ATIONS PROPOSED rONDUIT VAIJLTLOCATION �' w '- �r. �>£��V � ���A. . � SOLID64ALL PVC DRAIN PIPCS TU CARRY TUC ❑RAIN SEEPAGE TO IAONTO RING VAULTS r r »+� � e7 Qiw....Y �, � r �i�e 5 PR(}PDS Ef] 1 CONDUIT F%T=NSION{rCN"iiviY3 't••PF,�`s Ys� Ya f. � ��J f•� 1 v? � ~.�- .- d r_ r .V.u`��-1 o ff s -112 EXISTING GRADE 5 E%IS TIAG. CONDUIT VAULf�3.'P i SEE N07E3 C MR. - LO. dFERASIASILITY n e d �y y-x�'j. ' +� + 35P LF 6 -IN SLOTTED— EARfh1FILL {SEE NOTE'j bA p{ - Ff��'�� T `� �i.� WAS I PVC 001 I FCTOR 4 F : i F�N'� ., w � 'Li ALL DRAIN FILA INS TQP OF FINE GRAIN FILL `- PROPOSED SEEPAGE MONITORING VAULTS BOTTOM OF FINE PROPOSED OONU IIT VAULT DRAIN FILL North Fork Improvements Conduit Extension New vault Waterline modifications Drainage pipe modifications Temporary Raw Water Intake �t Conduit Extension Install WTP Bypass ■ Excavation for Extension ■ Demo Old Vault ■ Install New Conduit and Vault ■ Install Piping/New Valves New Mudline extension Line Seepage Outlets and Gravity Drain ■ Reconnect Raw Water Line to Plant Line Evaluate Extent of Raw Waterline Replacement ■ Place roof on Conduit Test Low Level Drain Divers Repair gate if needed Temporary Raw Water By -Pass orine Feed INTAKE ELEVA71ON 2520 Temporary Raw Water By -Pass -- Example: Douglas Lake Intake • • [IF c *44 d' A"rd� Z rt{•�'., r �4 lk • • [IF c A"rd� Z • • [IF c Details of Improvement Features Saddle Dam Features of Saddle Dam Raise Four Feet with Earthfill ■ Reshape US Rip Rap Strip IDS Slope Add Filters and Seepage Collection ■ Seismic Upgrade with Rockfill / Soil ■ Install Grout Curtain 11 Instrumentation 2650 2625 2000 2575 =,I 2525 -75 Saddle Dam - Seismic Stability Berm �0 -25 0 25 50 75 100 125 1 SADDLE DAM STABILITY BERM SECTION © STATION 40+08 150 2925 2575 2525 175 EXCAVATION EL 2615.5 �1 8-INMINIMUM EXISTING GRADE / SEISMIC STABILITY BERM O 1.5 CHIMNEY DRAIN EL 2585.0 - �1 RI RAP ADDED TO ESTABLISH UPSTREAM 2H IV SLOPES 2 EXISTING RgAO TRENCH DRAIN TqE QRAIN BLANKET DRAIN �0 -25 0 25 50 75 100 125 1 SADDLE DAM STABILITY BERM SECTION © STATION 40+08 150 2925 2575 2525 175 Saddle Dam - Seepage Collection �Y •y ,Y '1 11 .__-€CTON r't, ;. �'i'": a .: •w'�:j,-- .. _ _. � 1, 1 4 '•�. d — CTS.--r U; --- { X 'I 1' -.f..I1 Al 1•'YI/-N_A7F F 7OF _ —_—�—�^/ f � l YY 15.1 •+-,`,. 1r�1 / r/rr y L Y` I Y l 'J�LIn- 37u925aL,ofJ2 N NF`�FiH- 11 r�O r// ♦ —__— �_— --.—`—� }�YI 1Y i y1 >, I i ,TTFArI I y ._. hT.L »— rr ♦ —�---._� �_ I Y 4 y Y y'y �• ` 2';.5 I F F,i1: :s14ZF.� —� ^ _ -�� _ _: _— ----�----'— '+."=LL f"fC _CL _CCTOR I� ! fr.4l'<�•^":: � �'. 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I hr ~fYFk :'r ham, i' � .s f T i t '.F �� �S Yajr� ]aly f• �1' --_ �i S .tiS ii" yi-~�.l v3 r - _-a -- — —— -------------------------------------- If — — — — — — — — — — — — — I L----------------------------------------- L--------------------------------. ------------- 3,acoL€cALns€I13Mlc —------------- --------------------------- STMLITY HEFW-————————— — — — — —— ----- __------- }.j•� 41 r-rU WALL WC PIPE .__-€CTON r't, ;. �'i'": a .: •w'�:j,-- .. _ _. � 1, 1 4 '•�. d a. -\ - _ y f •f:ktz.-F l `r - / }CJS b �e •Nrf•a. _ _ S%J:' f. �i J y — ":� `r F NI -AI: iA N F i I•"., � n ^.4'� �' --•9�'s,=_'- a. K f 1 f s s r J� � J � i � • y,y rkr">`'}. c 1'r `.s uT,:t� yam• K9� .'�p' / .:,4 %r�S?.: .�>r�;'�•:3..��.'Yu(ul ^r:•sks�K,,.�, x ,r `i'uT'„' _v ♦♦ - F M�, w 2';.5 I F F,i1: :s14ZF.� • 1..5,i• '+."=LL f"fC _CL _CCTOR --. -- PIS_ —-RE4CH:R41N.-------------------------s --. ------ SCC YC -C2 ---------------------------- r SADDLE DAM SEISMIC STABILITY BERM DRAINAGE PLAN Details of Improvement Features Auxiliary Spillway Features of the Auxiliary Spillway Fuse Gates ■ Bridge r► Foundation Prep and Seepage Cutoff ■ Chute ■ Stilling Basin — Flip Bucket ■ Discharge Channel *A ell htii y J� 1i Ilk 1 ,tqE,; a+� � �• „ �: � � cif *rte m %,•' p.. - - y� "�7 .:� ,mss," � y fif • 0111 \'i'L • Auxiliary Spillway Fusegate Activation and Tipping Sequence Begin flowing at -200-year storm Crest of fusegates = 2610.0 5 5 +'' 4 1 2 2612.5 2613.0 6 1 2613.5 2615.0 6 2615.0 2614.5 2614.5 2614.0 SLOT IN PIER FpR $ipKpp9, rrP G. SPILLWAY BRIDGE PIER PLAN FLOW ERIIXEAEdWE "OTAER Downstream Auxiliary Spillway � Tailwater Peak PMP Auxiliary Spillway Outflow = 63,130 cfs Peak PMP Tailwater EL = 2497.03 ,v. House FF EL = 2506.0 Auxiliary Spillway - Excavation s4 t3. n 0i It N I Moil IIIIIII �71 ME 581-1 i t-9+CO P +!,: n 6c— C i 1&011 17 81-0-3 Aux. Spillway - Final Grading TT I r � {iH,IPOrWdYHOWLi�h➢!. '\ ,�� - � � - \ - ` � JI � �f � - -- - -_ . 5 jCMLY dlt3PRRIfIN 511RUEYE➢j TII SAYW PLACE AFT9i j. ,✓l _ _ CRCG�IG IE�N®m �, Auxiliary Spillway - Sections CL EXISTING GRADE --r-7-T-FT I-r-r~i-7- - T -- -------- --T-7- T-FT r --Y RETAINING WALL --;--■�10--miiiim_iiiimmii jiiimmiumiiiiii1maimmiii jimmiillm :glr ■ ■■■■■■■■ Auxiliary Spillway - Sections 2669 7 2660 2650 2650 2640 ROAD CHANNEL T- 2630 CL 2630 2629 I 2624 PMPDSED GRADE 281€1 2810 2600 2600 77-7 Ir 1 2590 2590 1 1 EXISTING GRADE 2580 1.52580 1.5 2570 EXCAVATION PAYLIM ITS 2570 2560 ESTIMATE] TOP OF ROCK 2,960 2550 140.00' 2554 2540 2540 2530 2530 2520 2524 2510 2510 2500 2500 2490 2490 -120 -110 -140 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 280 290 300 310 Auxiliary Spillway - Sections EXISTING GRADE CL PROPOSED GRADE — FLIP BUCKET 1 � 1 2 2 EXCAVATION PAYLIMITS 1 1 i .tea ESTIMATED TOIL OF BOCK Li—L I I I I I I I I «amu -190 -180 -170 -160 -150 -140 -130 -120 -110 -104 -80 -70 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 «MJ 2550 2W 2530 2520 2510 2560 2490 24480 2470 2460 2,450 2440 2430 242f1 Aux. Spillway - Grout Curtain AUXILIARY SPILLWAY. SEE SCT 500-AUXILIARY— `PILLWAY FOR STRUCTURAL PLANS AND DETAILS f r, DOWNSTREAM PRIMARY GROUT HOLE _RLINE A_IGNVENT ''i #i i • i .'• i �l � i i i i i i � • i * ;5400 30 53 00 32'00 * 31+00+5C 7.`u0' '. C.00' ._ ._ __ __ ._ __ — _ Ifj UPSTREAM PRIMARY GROUT HOLE -- E 1' !I r r, AUXILIARY SPILLWAY - GROUT CUTAIN PLAN � FLOW p an ao- ,�, t Disturbance Areas: Temporary Access, Staging, and Permanent Roads Temporary Access, Staging, and � Permanent Roads Temporary Access ■ Staging and Laydown Areas . Construction Trailers ■ Permanent Roads ■ City Personnel Access ■ Public Access in an Emergency DISTURBANCE AREAS CHART KEY TYPE OF DISTURBANCE DESCRIPTION LAND A PERMANENT PROPOSED AUXILIARY SPILLWAY Cl TEMPORARY STREAM CROSSING TO CONNECT STAGING AREA S1 TO S2 C2 TEMPORARY STREAM CROSSING TO ACCESS STAGING AREA S3 D PERMANENT SADDLE DAM M PERMANENT MAIN DAM U1 TEMPORARY TEMPORARY UNDERGROUND UTILITY WORK U2 TEMPORARY UNDERGROUND UTILITY WITH ACCESS PATH S1 TEMPORARY CONSTRUCTION STAGING AREA S2 TEMPORARY CONSTRUCTION STAGING AREA S3 TEMPORARY CONSTRUCTION STAGING AREA S4 TEMPORARY CONSTRUCTION STAGING AREA S5 PERMANENT CONSTRUCTION STAGING AREA S6 PERMANENT CONSTRUCTION STAGING AREA S7 TEMPORARY CONSTRUCTION STAGING AREA TO CONTAIN PUMP STAGING S8 TEMPORARY CONSTRUCTION STAGING AREA S9 TEMPORARY CONSTRUCTION STAGING AREA S10 TEMPORARY CONSTRUCTION STAGING AREA S11 TEMPORARY ROADS R1 REPAIR PAVED ROAD - EAR R2 REPAIR PAVED ROAD R3 REPAIR PAVED ROAD R4 IMPROVEMENT GRAVEL ROAD R5 IMPROVEMENT GRAVEL ROAD R6 IMPROVEMENT GRAVEL ROAD R7 REPAIR PAVED ROAD - EAR R8 IMPROVEMENT GRAVEL ROAD - EAR R9 IMPROVEMENT GRAVEL ROAD R10 IMPROVEMENT PERMANENT GRAVEL ROAD TO BE BUILT FOR USE DURING AND AFTER CONSTRUCTION R11 IMPROVEMENT GRAVEL ROAD. TO BE IMPROVED ONLY IF DEEMED NECESSARY FOR CONSTRUCTION. R12 IMPROVEMENT GRAVEL ROAD - EAR R13 IMPROVEMENT GRAVEL ROAD H1 IMPROVEMENT EXISTING ABANDONED CONSTRUCTION ROAD FOR TEMPORARY DISTURBANCE & USE. DISTURBANCE DEFINITIONS PERMANENT THESE AREAS WILL BE PERMANENTLY DISTURBED EITHER BY GRADING FOR CUT, FILL OR BUILDING A PERMANENT STRUCTURE. TEMPORARY A TEMPORARY DISTURBANCE INCLUDES NO CHANGES TO THE GRADING OR FUNCTION OF THE AREA FROM THE CURRENT EXISTING CONDITION. THESE AREAS MIGHT NEED POST -CONSTRUCTION MAINTENANCE TO RESTORE GRASS. REPAIR ROADWAY REPAIR IS FOR EXISTING PAVED ROADWAYS THAT MIGHT BE DAMAGED DURING CONSTRUCTION. IMPROVEMENT ROADS TO BE IMPROVED ARE ANY ROADS THAT WILL BE NECESSARY FOR CONSTRUCTION AND WILL NEED TO BE IMPROVED FOR CONSTRUCTION TRAFFIC. EMERGENCY ACCESS ROUTE (EAR) THIS SERIES OF ROADS ARE NECESSARY IN THE CASE WHERE THE NORTH FORK - RIGHT FORK ROAD IS CLOSED DUE TO ANY FLOODING OF A BRIDGE. ACCESS IS FOR ALL PLANT STAFF AS WELL AS A NEIGHBORHOOD DIRECTLY UPSTREAM OF THE BRIDGE. ROADWAY IMPROVEMENT ® ROADWAY REPAIR DISTURBANCE AREA START/END ROAD SEGMENTS POTENTIAL WETLAND POTENTIAL SEEPAGE AREA POTENTIAL STREAM PROPOSED WATER PIPELINE ROUTE ASSESSMENT AREA MAP NOT TO SCALE 1-i �� r� \ \<' OVERALL SITE ASSESSMENT AREAS FOR ENVIRONMENTAL PERMITTING Permitting Environmental Permitting Update ii, Completed to Date Wetland & stream delineations including GPS Vegetation survey Threatened & Endangered species assessment Meeting with USACE; JD survey completed Compilation of archaeological/cultural resource information Environmental Permitting Update Next Steps - Schedule Milestones Submit environmental review request to SHPO & Cherokee/Catawba THPOs (in progress) JD Report from USACE for mitigation requirements ■ Convene resource agency ID meeting Submit ILF request ■ Prepare supporting environmental document Prepare/submit USACE permit application (404/401)