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 2
- Issued by
- Arapahoe County, Denver City, Colorado
About this file
This is a technical exhibit document providing a water elevation profile figure for the Captain Jack Mill Superfund Site located in Ward, Colorado. The figure presents hydrological data collected in October 2024, mapping water levels across multiple mine workings and monitoring locations within the site's underground infrastructure. The document illustrates the spatial relationship between various mine portals, adits, monitoring wells, and water management facilities, including the Dew Drop Portal (elevation 9,246 feet), Big Five Adit Portal (elevation 8,940 feet), and associated settling ponds. Water elevation measurements are recorded at multiple monitoring points, ranging from approximately 9,070 to 9,103 feet above mean sea level, with specific data collection dates noted for each location. The figure identifies critical infrastructure components including recirculation pipelines, a 7.5 HP submersible pump at PB #1, vault controls, and a bulkhead floor structure at 8,944.4 feet, along with annotations regarding hydraulic connectivity between certain mine workings and intersections with unknown subsurface voids.
The technical exhibit indicates that the site contains complex mine workings with varying hydrological conditions, including dry monitoring locations and areas with active water circulation systems managed through recirculation infrastructure between PB #1 and DD #3. Notable features include an approximate limestone stockpile spanning 221 feet, existing ore piles, tailings deposits, and upwelling locations requiring monitoring. The document notes that tunnel widths typically measure 9 to 10 feet and identifies several monitoring wells that are not located within active mine workings. This data collection effort supports the ongoing operations and maintenance requirements for the Superfund site, providing essential baseline information for water level management and environmental monitoring activities.
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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 .