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LEGEND: <br /> w N rt <br /> x UTILITY POLE VN '- M <br /> GUY WIRE �� rp o °co N? E <br /> G 1 ao M o <br /> - - -- - - -� - i �r . r� rr r 1 P GAS LINE MARKER r�i ? <br /> r <br /> t cz <br /> \ f` J r .- _ J rrr rr rr� i ; E: CX0 <br /> PERMIT GAS VALVE > U "- <br /> _` 5g1 � DISTANCE VARIES 12.5�/ j / I BOUNDARY * OVERBURDEN AND TOPSOIL B Q 10 4 0''� /urn r� r EXISTING BACKFILL ALL DISTURBED AREAS 0 WELL �� 'o 0) � <br /> t T r r r r 96 \t r DOWN TO WATER <br /> SOUTH BRANCH SURFACE rr <br /> r�5 GROUND VARIES r/ CV <br /> \ r r r OF PLUMB DITCH r ' — r r ® WATER METER <br /> z 1, \TS/OB/ / ��j r/ = 4591' X WATER FAUCET o M <br /> //" _q5 fI ? SLURRY WALL P WATER LINE MARKER o <br /> A ELECTRIC TRANSFORMER <br /> rr rr rrr rr t1 ' TREE <br /> SAND AND GRAVEL . 13 1 <br /> r Re0 / 7 TELEPHONE PEDESTAL <br /> p <br /> JLII t --�--9— x � , `" " � -_.. %,•' �' _ � ' � �' � �k I . � 1� �Mp f �\ � �SCOP� T TELEPHONE LINE MARKER <br /> s <br /> PROPERTY LINE <br /> a 1 11 I r X� / 77 <br /> BEgROCKf/ /// /" FENCE LINE <br /> Y 1 1 ar / �/ /✓ /� �� �/f of of OVERHEAD ELECTRIC LINE <br /> CU <br /> A TYPICAL BACKFILL SECTION G G EXISTING DUKE GAScu <br /> _ I N.T.S. N'--N'--- UNDERGROUND WATER LINE a <br /> 4840 <br /> _ "'` EXISTING CONTOURS (2' INTERVALS) '_�. <br /> GRAVEL ROAD ICI E <br /> s <br /> 7 U- )METER DRAIN PROPOSED PERMIT BOUNDARY N <br /> LOCATION ; <br /> (I REQUIRED), BACKFILL EXISTING <( ir <br /> TRENCH WITH NATIVE PROPOSED SLURRY WALL O <br /> MATERIALS CO <br /> 4640 PROPOSED CONTOURS ao �' `` <br /> PERIMETER DRAIN v w n <br /> 6V <br /> ie LZ <br /> k4+ 4 <br /> Li l N u. <br /> 1.5' TYP. SANDY CLAY - <br /> I <br /> OVERBURDEN <br /> Jl \ i ASTM 633-7 <br /> 11 ti .. I3 VARIES <br /> l ' CONCRETE. . <br /> I \ �� j\ �; i ° „ <br /> AGGREGATE . . . . . . . . . . - <br /> . . . . . . . . . . rI, <br /> (MIN) . . . J d <br /> �V+�I+.. �AA���\\V�\ \\A'�,. •• 7 �j�J ^ Nlip .° �. n <br /> \\w �1 \ r ° „ '' kJ40 <br /> ASTM C33 a ° <br /> i�. <br /> \ \\ \� CONCRETE SAND 25 <br /> \�l 11 \ ,. . I'— OFFSET DITCH a. <br /> V A �� V I IF REQUIRED) - <br /> \\�/f// \ti 1h\\\ ( VARIES . �oN SHOP i= O <br /> ( ° 4.0' ri <br /> C \11 \ii SAND ANID GRAVEL �Akp r <br /> \\ �`"�\ REC BOTTOM OF DITCH <br /> \\\ ALLUVIUM) BANK SLOPE ' > C7i <br /> d <br /> N <br /> . <br /> 1.5' (TYP.) SOUTH BRANCH DITCH <br /> ( . a 05 <br /> till <br /> TYP. OFFSET DETAIL <br /> 1 ��\VVAAAAll <br /> I N.T.S. i <br /> cc <br /> 3 � <br /> INLET/OUTLET <br /> ),—FACILITY PERIMETER DRAIN DETAIL (TYPICAL SECTION IF REQUIRED) <br /> N.T.S. <br /> , <br /> SLURRY WALL NOTES: <br /> 6. Soil-Bentonite Bagkfill Specifications <br /> 1. Bentonite Specifications S-B backfill slump ASTM C 143 1 set per 100 cu. yds. <br /> L YP/PV ratio API Std. 13A less than 3 <br /> Viscometer greater than 30 Slump 2-6 inches g <br /> Filtrate Loss less than 15 cm3 <br /> a! s + +r! y Moisture Content ASTM D 2216 less than 10 percent S-B backfill gradation 1 set per 300 cu. yds. <br /> Test results for each lot of bentonite must be provided. ❑ <br /> Screen (US Standard) Percent by Dry Weight lA <br /> Z <br /> 2. Water Specifications # 4ch 400-80 0 <br /> pH 6-8 N <br /> We I Y Hardness less than 200 ppm #200 20-40 'w <br /> Total Dissolved Solids less than 500ppm # W 1 <br /> " r Oil, organics, acids, alkali less than 50 ppm each <br /> xy, Chloride report Minimum Plasticity Index of 10 y <br /> PERMIT 3. Bentonite Slurry General Specifications 7. Key Trench and Slurry Wall Cap Specifications v <br /> BOUNDARY The initial bentonite slurry must be tested prior to placement in During excavation, soundings should be obtained to determine the T >- <br /> the trench. The slurry may be mixed in high shear mixers or elevations of the top of the key layer, the bottom of the m <br /> mixed and hydrated in slurry hydration ponds. In general, a excavation, and the bottom of the trench prior to backfilling. If <br /> EXISTING 25' minimum hydration time of 8 hours will allow the bentonite slurry sediments in excess of 2 inches have accumulated it is necessary �, <br /> GROUND OVERBURDEN AND TOPSOIL to meet all criteria. A minimum bentonite content of 6 percent in to clean the trench bottom by airlift pumps or excavation cu <br /> \� <br /> BACKFILL ALL DISTURBED AREAS ❑ <br /> 3;r 33' slurry Y required. <br /> the slur b weight is re . equipment to remove the sand and sediment that has settled. The 12.5' DOWN TO WATER SURFACE 3' 9 q trench bottom should be cleaned, as a minimum, at the beginning o M <br /> 4594' 4. Bentonite Slurry Testing Specifications before Placement of each shift. Soundings should be obtained approximately every z <br /> = Viscosity Marsh Funnel ( I RP 13B- ) less 20 feet. <br /> 4591' sit Measured w <br /> Filtrate Loss cm3 <br /> than 40 sec Adequate keying in the S B backfill to an impermeable layer at <br /> Density less than 64 pcf the base of the wall will be required and specified in the final <br /> SLURRY WALL L 6 5 t 10 0 <br /> P o L l/ <br /> . I <br /> . . .. and H design report for the slurry wall The design documents will include <br /> The tests listed above should b u or times per shift <br /> a description of the key in layer and describe how trench cuttings <br /> SAND AND GRAVEL ,_�7'1'�iy , ateleast onceeperbbatchofslurry.rThelslurry must be furthersadequately{ okeyed. Temporary slurry wall t wall <br /> 2' or other II b he slurry <br /> will be T a protection will <br /> trench. The tests conducted re or placed w / <br /> content, pH.eTwo sets of per <br /> emporaryich <br /> c . / required in he form of a noncompacted soil cover in <br /> tested after placement in the <br /> viscosity, density, sand cont one day over each backfilled 100 foot reach The t over <br /> shift at two locations in the trench (approximately 2 feet below is removed after settlement (approximately 2 weeks) and replaced <br /> r <br /> \ \ with a la cover over the completed compacted clay slurry slu ry wall. <br /> the slurry surface and 2 feet above the bottom of the trench) <br /> are reeuir density o slurry in 8 P 9 Job n 7113 <br /> P e 15/08 <br /> Post construction n testing ill be conducted °n accordance with the <br /> replaced h Wcessfreshdslurry. The slurry level must benmaintained or <br /> the <br /> sla$ T <br /> \ \ \ p t m y g e <br /> /// least3feethabove° theground watervelevationsand' nomorethanry "ColoradosState oEngineerswOffice." o Drawn By _____ 9/WSS <br /> // 3' - 4' / /BEDROCK/ �/ // Designed By TPY <br /> / , /// , // j 2 feet below the top of the working platform. -_ _- <br /> 200 100 0 200 400 600 �j ///l �j ' .' , / �j " . �j 9. Above specifications (notes 1-8) are provided as a generalMd Checked ev JCY <br /> /r - / ,' r // ,' �/' // �' guideline for permitting purposes. Final specifications and design File JT-Reclamation <br /> 5. Bentonite Slurry Testing Specifications after Placement criteria will be developed during the final design of the slurry wall. scale 1"=200' <br /> SCALE IN FEET Unit Weight 1.03 to 1.40 gm/cm3 <br /> s TYPICAL BACKFILL SECTION Sand Content ASTM D 4381-84(1993)et0 to 20 percent by Sheet: Of: <br /> N.T.S. volume <br /> 1 , <br />