1991-10-07_PERMIT FILE - M1991123 ‎(5)‎

• Permit No: M1991123
• IBM Index Class Name: Permit File
• Doc Date: 10/7/1991
• Doc Name: REGULAR OPERATION 112 RECLAMATION PERMIT APPLICATION FORM
• Media Type: D
• Archive: No

i
f EXHIBIT G
s&S
WATER INFORMATION
General Information
The proposed mining operation is located in the Boulder Creek Basin
and is adjacent to Idaho Creek, a small tributary that runs
parallel to Boulder Creek near the confluence with Saint Vrain
Creek (See Vicinity Map) . The mining operation will expose
groundwater and will have an impact on surface and groundwater in
the area. However, the proposed mitigation plan as outlined in
this exhibit does minimize the impact to the hydrologic balance and
protects water right users as required by Colorado Water Law.
j Idaho Creek has historically served as an irrigation structure for
1E area farms. It does not have a significant drainage basin at this
location but relies mainly on diversions from Boulder Creek and
return flows. The Idaho Creek basin is traversed by numerous
irrigation ditches that would intercept most of the runoff
I generated in the basin. It is also downstream of the City of
Boulder wastewater treatment facilities. As such, this creek is
not pristine in nature nor is the water quality particularly good.
There are approximately 22 decreed surface and groundwater rights
in the surrounding area that are identified. Most of these rights
are irrigation ditches that claim their source from Boulder Creek.
There are some permitted wells in the area that are listed by owner
in the State Engineer's Office. Figure G-1 is a location map of
all decreed or permitted water rights within a one mile radius of
the property.
Surface Water
i The area is within the Boulder Creek drainage basin. Idaho Creek
' is a minor creek that is artificially fed water from Boulder Creek
through a diversion structure. The project site is located 1.6
miles (8, 300 ft) downstream of the diversion structure. There are
numerous irrigation ditches in the area that intercept stormwater
runoff. Idaho Creek now serves the area as a large irrigation
conveyance structure and also intercepts irrigation return flows in
the area. There is very little flow in Idaho Creek during the off-
I
season for irrigation.
�. All surface water eventually reaches St. Vrain Creek and the South
! Platte River. As such, all water rights in the area come under
Division 1 administration. The property lies within Water District
6.
G-1
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