1987-10-01_PERMIT FILE - C1981017

• Permit No: C1981017
• IBM Index Class Name: Permit File
• Doc Date: 10/1/1987
• Doc Name: Phase II Waste Disposal, Detailed Design
• Section_Exhibit Name: Map II-B-App 5-6 Sheet 6 of 9
• Media Type: M
• Archive: No

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SECTION C—C, OF r PHASE ii PILE
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NOTES :
1 ) PROPERTIES OF WASTE MATERIAL AND MANGOS SHALE BEDROCK TAKEN
O2s0 FROM MORRISON- KNUDSEN REPORT , ''ENGINEERING EVALUATIONS , COAL !
C / WASTr_ �gTMlti BASIN MINE'' . PROPERTIES OF COLLUVIAL SOILS WERE DERIVED F QM
>5 / TRIAXIAL�TESTING OF SAMPLES OBTAINED FROM BORING W- 1 , SHO N
\ 9350 'J�S 8300 �\ 200' a-I�.' � � / ���" _ o F ON SHEET 2. SSE NOTE 4. 3, 2 OF SPECIFICATIONS (SHEET 9)
2 ) AN ACCELERATION FACTOR OF 0 . 05 g WAS USED FOR THE EARTHQUAKE,
STABILITY ANALYSES •
v, v00_ �"� I (.!i'l_.1JN0 wATEE LEVE4 G
3) COLLAIAL SOIL IN PILE FOUNDATIOt 1S ASSUMED SATURATED
AT NATl.12lu- CagoIJND SU2FACE `p..v��!� � Z �-UVIAL �G,, F J R STABILITY ANALYSES .
AI LL.i
I � GA`✓ �
L EUEND F��_ rioN
N1/-1NUJ`S "AL-E 0.GDWY y \
iY 5nT - 121 GI;F
�— LIMIT OGII WASTE PILE O �.Et�IMEML�.Tf u F2�.11� LQ-AT10N
LL"
C FSv
\ @I C.ONTOUQ ON SUP_r-AC _- OF 16 SCALE I"=ZOO'
�` �IZ PILE \ �^ L.O�T10N OF (�Qp55 -�F-GTION I-ipC,ZpNTAL AND VE2TI(AL_
I TuPl�UGH Z7ILE
�•-- =��o�l^I I� - A�� FIGS 2F D : STAElL_1TY ANALYSIS OF r-1 A II PILE RECEIVED
\� SrIP�sA*�+ Dlvf;eSloN ` r ' C'PFGTOF �SEa DEC 11987
2UNO WASTE PILE / MINED LAND
FG C�L.F,GTION DITGJ-1 �
RECLAMATION DIVISION
Rt mUPE A: PLAN OF I —IA II WASTE PI
'\ ZFT. M~ NOTES
G GENERAL NOTES 1 ) EXCAVATE TRENCH TO MINIMUM DIMENSIONS SHOWN ALONG NATURAL DRAINAGEWAY AS SHOWN
aeEE pfrAlNltrG I v IN FIGURE A AND SPECIFIED IN GENERAL NOTE 3. ;
1 ) PRIOR TO WASTE PLACEMENT (PHASE II PILE CONSTRUCTI(ON) , COMPLETE ALL CONSTRUCTION DETAILED 2) SUBDRAIN I
ROCKFILL SHALL CONSIST OF DURABLE , NON-DEGRADABLE ROCK MATERIAL.
ON SHEETS 3, 4, AND 5. ::•
'b i MATERIAL SHALL BEI2 INCHES.90 PERCENT OF THE MATERIAL SHALL BE OF 6 INCHES OR GREATER. MAXIMUM SIZE F
2) PRIOR TO WASTE PLACEMENT, STRIP TOPSOIL AS NEEDED LAND STORE IN AREAS DESIGNATED ON FIGURE oO 1' q cr
A AND SPECIFIED ON SHEET 9 ITEM 1 . 3. USE AREA DE.'SIGNATED "TOPSOIL STORAGE" UNTIL ITS FILTE.¢.- FA62JL 3) POLYPROPYLENE FILTER FABRIC, SUCH AS MIRAFI OR SIMILAR MATERIAL , SHALL BE
l
CAPACITY IS REACHED, THEN USE AREA DESIGNATED "ADD:'ITIONAL TOPSOIL STORAGE". o i f G`IQ�E '�) / USED. ALL JOINTS OF FILTER FABRIC SHALL OVERLAP
P A MINIMUM OF 24 INCHES.
3) PLACE WASTE IN THE AREA DESIGNATED FOR PHASE II PllLE CONSTRUCTION AS SPECIFIED ON SHEET 9,
ADEQUATE SURFACE DRAINAGE OPN PILE SURFAE. CONSTRUCT BERMS AT PILE 4) EXTEND NORTHERN END OF SUBDRAIN A MINIMUM OF 10 FT BEYOND LIMIT OF PILE AND
SECTION 4.0. MAINTAIN ADE
Q ( �0� ! PROTECT WITH FILTER FABRIC TO PREVENT CONTAMINATION.
CREST AS NECESSARY TO PREVENT SURFACE WATER RUNOFF OVER PILE OUTSLOPE. CONSTRUCT TEMPORARY
BERMS OR DITC ES ON PILE SURFACE AS NECESSARY TO DIVERT RUNOFFFROM PILE SURFACE AND OVER-
LYING NATURAL SLOPE INTO ACCESS RAMP COLLECTION DIITCH. CONSTRUCT SUBDRAIN AHEAD OF WASTE F .
PLACEMENT AS NEEDED, AS DETAILED ON FIGURE A AND SIECTION E-E' OR OTHER APPROVED DESIGN.
4) NO SLOPE SHALL BE CONSTRUCTED STEEPER THAN 2(H) :1OV). !
��.LE>_ ," = z' e44�-F8 WASTE DISPOSAL, DETAILED DESIUN
5) WHERE LIMITS OF THE PHASE II WASTE PILE CORRESPOND) TO THE LIMITS OF THE 47-YEAR PILE (AS C /
SHOWN ON SHEET 8, FIGURE A) , RECLAIM PERMANENT SLOPPE AS SPECIFIED ON SHEET 9, SECTION 6.0. 5F C IT I ON G - � Of U f >I D 2 A N
6) PHASE II PILE AS SHOWN HAS A TOTAL STORAGE VOLUME (OF APPROXIMATELY 1 ,700,000 CUBIC YARDS. COLDER ASSOCIATES
1 730 1 WEST COLFAX AVE., SUITE 275 MID CpNTI�tENT QE�1JU2.C-e5, II`x-
7) PHASE If PILE WILL BE INCORPORATED INTO 47-YEAR PIILE AS SHOWN ON SHEET 8. GOLDEN, COLORADO 80401 ESax 158
[phone] ALg, (_0LC2Aoo
9) THE ELEVATION OF THE TOP OF THE PHASE II PILE SHALLL NOT EXCEED 8310 FEET (EXCEPT
AT THE NORTHERN END OF THE PILE) UNTIL THE STABILIITY OF A PILE OF GREATER HEIGHT DESIGNED BY (- l`1
^' Dy�tP r
HAS BEEN VERIFIED BY APPROPRIATE FOUNDATION EVALUAATION AND STBBILITY ANALYSIS. ' a CHECKED BY m5
DR"INN BY : pL APPROVED BY
DRAWING N0. >- SHEET (,p OF 9
DATE �.1�f21L_IIq�(p SCALE: AS INpI(_ATEo
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