Exhibit E Water Elevation Profile Figure.pdf
PDF 114 KB Posted
- Attached to
- Captain Jack Mill Superfund Site O & M
- Solicitation number
- RFP FAAA 2026000184 1
- Issued by
- Arapahoe County, Denver City, Colorado
About this file
This document is a water elevation profile figure for the Captain Jack Mill Superfund Site located in Ward, Colorado, prepared as of January 3, 2025. The figure illustrates the water level measurements collected in October 2024 across multiple mine workings and monitoring locations at the site, with elevations ranging from approximately 8,900 feet to 9,250 feet above mean sea level. Key locations depicted include the Dew Drop Portal, Big Five Adit Portal, various numbered monitoring wells (MW #1-3), boreholes (NIW #1-3, MID #1-2), and settling ponds. The document identifies a recirculation system operating between PB1 and DD3, with a 7.5 horsepower submersible pump positioned at PB1. Water elevation data recorded in September and October 2024 shows levels ranging from 9,070.7 feet to 9,103.4 feet, with notable notations that certain locations are hydraulically connected or intersect unknown mine workings.
The figure includes technical specifications such as tunnel widths of 9 to 10 feet, a bulkhead floor elevation of 8,944.4 feet, and the location of an upwelling point 976 feet from the ore pile toe. Supporting infrastructure documented includes a limestone stockpile (approximately 221 feet), an existing ore pile, tailings pile, left hand creek, and Peak to Peak Highway (Highway 72) in relation to Colorado Department of Transportation rights of way. The document serves as a baseline survey reference for monitoring groundwater and mine water conditions at this remediation site.
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Text version
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WATER LEVELS – October 2024
CAPTAIN JACK MILL SUPERFUND SITE
WARD, COLORADO
Figure 2
By: EJL Date: 01/03/2025
9500'
9450'
9400'
9350'
9300'
9250'
9200'
9150'
9100'
9050'
9000'
8950'
8900'
8850'
0' 0'
EL
EV
AT
IO
N (F
EE
T
AB
O
VE
M
EA
N
S
EA
L
EV
EL
)UNKNOWN VOID(S)
NIWOT #3
NIWOT #1
NIWOT #2
MIDWAY #2
MIDWAY #1
(NOT ON
CENTER-LINE)
DEW DROP
PORTAL
9,246'
DEW DROP #2
(NOT IN
WORKINGS)
DEW DROP #3
DEW DROP #1
(NOT IN
WORKINGS)
TO NIWOT CROSSCUT
AND COLUMBIA VEIN
RECIRCULATION
PIPELINE
PEAK TO PEAK HWY
(HWY 72)
CDOT ROW #1
(NOT IN
WORKINGS)
CDOT ROW #2
NEW CALIFORNIA RAISE
MW #3
(NOT IN WORKINGS)
PB #1 VAULT
RECIRC CONTROLS
PB #2 VAULT
ERT & POWER
MW #2
(NOT IN WORKINGS)
MW #1
(NOT IN WORKINGS)
BIG FIVE ADIT PORTAL
8940'
UPPER SETTLING POND
LOWER
SETTLING POND
LEFT HAND CREEK
DISTANCE FROM PORTAL (FEET)
TAILINGS PILE
BULKHEAD (3" & 12" PIPELINES)
APPROXIMATE
LIMESTONE STOCKPILE
(~221')
EXISTING ORE PILE
UPWELLING LOCATION
976' TO ORE PILE TOE
NO DATA
AVAILABLE
NOTE:
1.) DEW DROP #3, CDOT ROW #2, AND THE NEW CALIFORNIA RAISE (NCR)
ARE HYDRAULICALLY CONNECTED.
2.) MIDWAY #2, NIWOT #1 - #3 INTERSECT UNKNOWN MINE WORKINGS.
3.) TUNNEL WIDTH IS TYPICALLY 9' - 10'.
ROW#1
9,113.23'
(mm/dd/yy)
ROW#1
9,080.66'
(mm/dd/yy)
EXAMPLE:
- LOCATION
- ELEVATION OF MINE WATER amsl
- (DATE SAMPLED)
ROW2
9,070.8'
(10/25/24)
PB1
Water Elevation
9,069.0' (10/25/2024)
BULKHEAD FLOOR @ 8,944.4'
0.5%
PB #1 7.5 HP
SUBMERSIBLE PUMP
MID2
9,070.7' (9/20/24)
RECIRCULATION SYSTEM
BETWEEN PB1 AND DD3
Total Depth 9,251.3'
Total Depth 8,966.7'
Total Depth 9,021.0'
NIW1
9,071.2'
(9/20/24)
NIW2
9,072.6' (9/20/24)
MW3
9,103.4' (9/20/24)
NIW3
DRY
(9/20/24)
DD3
9,070.8'
(10/25/24)
MID1
9,099.4'
(9/20/24)
File details come from the government source that posted it. Updated .