_REPORT - M1995035 ‎(7)‎

• Permit No: M1995035
• IBM Index Class Name: Report
• Doc Name: STORMWATER MANAGEMENT PLAN WELLINGTON DOWNS PIT
• Permit Index Doc Type: ANNUAL FEE / REPORT
• Media Type: D
• Archive: No

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EXHIBIT G
WATER INFORMATION
Surface Water
The site is located within the Cache La Poudre Flood 100-yeaz floodplain. The floodplain definition
is located in Exhibit C of the DMG permit application. This information was taken from November
17, 1993 FEMA Panel # 080101 208. A portion of the Cache La Poudre floodway also passes
through the site. This is due to the under sizing of the I-25 bridge passing over the river north of
Harmony Road.
At the time, there are two ditches on the property used to irrigate. These irrigation ditches are
strictly used by the property owners. Only the one on the west side will be effected by mining
activity. The property owners have no objection to the removal of this ditch.
The western edge of the permit follows a segment of a Box Elder Ditch lateral (Arthur Lateral).
Connell will not mine closer than 100 feet to the Arthur Lateral.
The Fossil Creek Inlet is located on the west of the permit boundary. It will not be affected by the
mining activity.
The topography on the site dips to the southeast, therefore surface water coming onto the property
is generally from the northwest and water drains at the southeast comer. Connell will submit an
application to the Colorado Department of Health for a Stotm Water Discharge Permit and Storm
Water Management Plan. Connell will take measures to minimize the natural drainage course on
the site. Topsoil and overburden stockpiles will be placed outside of the floodway and aligned in
the direction of the flows (see Exhibit C). Stockpiles remaining in one location for longer then one
growing season shall be seeded to reduce erosional effects. The excavation of a pit will reduce the
floodplain width and as well as the flow velocities. It will act as a sediment trap and reduce the
amount sediment potentially leaving the site.
A wetland delineation of the site was performed by a wetland professional. There are .95 acres of
jurisdictional Waters of the U.S. within the permit area, including .57 acres of jurisdictional
wetlands. These wetlands have evolved over a period of time as a result of irrigated farming.
Exhibit C displays the boundaries of the wetlands and any Waters of the U.S. discovered from the
delineation. The Army Corps of Engineers is being contacted regarding the recommended course
of action for any necessary wetland permit. Exhibit G-I is letter of wetland delineation and
determination that has been sent to the Corps.
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