2011-01-20_REPORT - C1981022

• Permit No: C1981022
• IBM Index Class Name: Report
• Doc Date: 1/20/2011
• Doc Name: 4th Quarter 2010 Mine Refuse Pile Inspection Report
• From: Oxbow Mining, LLC
• To: DRMS
• Permit Index Doc Type: Waste Pile/Fill Report
• Email Name: MPB
• Email Name: SB1
• Media Type: D
• Archive: No

Sample Origin Elk Creek Gob Pile
Material Description Coal Waste
Soil Type Coal Waste
130.
Test By DRS
Test Date /Q 410
Sample # 1
TEST RESULTS 81ov9 Perc n
•---{ - F ?- F:._ - MAXIMUM DENSITY: 61.8 Size Passing
OPTIMUM MOISTURE: 18.5% 5"
120 4.,
ROCK CORRECTION:
MAXIMUM DENSITY: 3"
OPTIMUM MOISTURE: 2"
TEST METHOD: ASTMD-698A
PREP. METHOD: MOIST 3/4"
110 HAMMER: 5 LB 1/2"
f ..f...:f:::?-- :---1---{: FRACTION USED: 44 3/8"
I_....- MOLD SIZE: 4" diameter 4 100
----[:---[ -I --1- :::::::1::-1-- 1- - {- - =1 Specific Grav' 10 72
Liquid Li y: 20 46 I
100 I------ ---- ---- Plastic Limit: 40 30
h I ...I I i { {-•-- ---- {. Plasiticity index: 100 15
E- E ?- I a 1 - ----I---- --- ---- 200 8.8
---[ ---[ --1--- --- -1-:::?- - a----1- :)::::1- --1---(-- - - [----[:_- 0.02
-- - C-- C - 1- - ]::::1::::1- i--i-1----1t- -{-- - ----C-- -(_- -C a: 0.005
90
--.
Z ::T:.::1 i -i i i { [ { r r -r -------
---
----j----j----{----?----
o E E I I ---I -?---- ---- - em Air Voids Curves'
80 I { ---{ ---( ---E _ ----E
--- ---- - ---- ---- ---- ---- ------------- ---- ---- ---- ---- ---- ----
----G----C----C::::1:::- --- -1----a---??----1---- ---- - -- ----{_.--{-- . --- :---[...-,..-:C---- ---- -- s 1.90:
----r----r----1--::a--- - --1---=J-=--1----i--- ----i----i---- ---- ---- ---- --- ---- -- - I ----j----L:::1---:1::::
-- -f----f--:.F::: .......I. .I__..{.:
E [ I -----
------ ---- ---- -- -
70 [ - - - : , KGs 1.70
--- ---- ---- ---
---- --:.-C..---C---:I--= -?--1----?--::?--=-1---- ----1---t1---:{:---1---- ---C:--.{----C----C---- -=--C- --- ?-::1:--- ---- ---- ---- --
i--------:1:i::::::::{-::a:::a::::f::::::::I:::::I:::: I:::=! {
-- -----------
I I - :a- -- - - ---a-- 1 -
60
-1----1-----?::::1:--- -- -[---- [----[::--[---- ----G----1---=1----a--- ----]----]- --1=::-1----
----f----f----f----l::::- --{---- --_-{-=-1----i----(?--- ----r---- r----r----f-?-- ---f----1----1----1--:::-=-i-::: {_-_-{_---{- --
-- --::f::::E I---- ---- --
I { 1 - --{ { I . -I......-[ { {.._{ F I I -- i 1 -{----{--::
--- (--- (----I----1---- ----1----a--- a::.-:i---- ----7----i--- 1----i--- ----i-- -(----(---_i--- _---E----(- --1--:: ---
-----1---1----1----j:::
- =-G-:- :::I --1----1---1--{-- 1- --1--- 1- -.... =-:-C-- -- [- 1- -1-- -1-- - -- -a----1---1- :1=--
50 -
-- ---- ---- ---- --- -
15 20 25 30
35 40
MOISTURE - % of DRY WEIGHT
Elk Creek Mine/GOB Pile
Somerset Colorado
GRAND JUNCTION
LINCOLN - DeVORE, Inc. Oxbow Mining LLC
Somerset, Colorado
Geotechnical Consultants Job No. Drawn
Grand Junction, Colorado Date
93948-GJ EMM 10-08-10