PERMFILE114795

• Permit No: M2000113
• IBM Index Class Name: Permit File
• Doc Date: 3/6/2001
• Doc Name: Public Notice
• From: US Army Corps of Engineers
• To: DMG
• Media Type: D
• Archive: No

CESPK-CO-R Pale 4 Public Notice Number 200175036
ADDITIONAL INFORMATION: As mitiga~aon, the applicant conceptually expects to
create 10.73 acres of wetlands, 101 acres of aquatic habitat (open water) and 10.11 acres of
drainage channel. Approximately 16.8 acres o1' landscape appropriate for wetland mitigation
has been identified along the slough (wetland 3), along Mamm Creek, and in the mine pit of
Mining Areas B and D to replace the 10.73 acres of wetland impact. A riparian wetland
complex with shallow water habitat for emergent plants, and seasonally saturated soils for
riparian trees and shrubs would be created along the slough and Mamm Creek. An emergent
wetland habitat will be created in the mine pits. The new wetlands azeas along the slough and
Mamm Creek would be broadcast with a native wetland seed mix into topsoil. Trees, shrubs,
and forbs will be acquired from nurseries and planted in appropriate habitats. Sandbaz
willows may be started from cuttings from local willow populations. Cottonwood seedlings
which will likely germinate around mazgins of the water in the mining azeas may be relocated
to mitigation sites. The mine pit wetlands will be created by broadcasting the native wetland
mix and by planting live graminoids and forbs. The wetlands mitigation sites will be
monitored by a wetlands ecologist for 3 consecutive years. Annual reports would be
submitted to the Corps of Engineers. As mentioned above, the 2.17 acres of aquatic habitat
impact would be mitigated by the 101 acres of aquatic habitat created in the mine pits. The
mining of Area A would impact 8.70 acres of drainage channel. After termination of mining,
the 24 acres of lowered landscape would fill with water and would eventually fill with
sediment and small size aggregates. Therefore, the applicant states that this 24 acres of new
drainage channel would compensate for the 10.11 acres of drainage channel impacts.
The applicant has requested water quality certification from the Colorado Department of
Public Health and Environment, Water Quality Control Division in accordance with Section
401 of the Clean Water Act. Written comment:; on water quality certification should be
submitted to Mr. Phil Hegeman, Planning and Standazds Section, Colorado Department of
Public Health and Environment, Water Quality Control Division, 4300 Cherry Creek Drive
South, Denver, Colorado, 80222-1530, on or before March 24, 2001.
The Colorado Department of Public Health and Environment, Water Quality Control Division
also reviews each project with respect to the anti-degadation provision in state regulations.
For further information regazding anti-degradation provision, please contact Mr. Hegeman at
the Colorado Department of Public Health and Environment, Water Quality Control Division,
telephone [phone].
The latest published version of the National Register of Historic Places and its monthly
supplements have been reviewed and there aze not any places either listed or recommended as
eligible which would be affected. Presently unknown cultural resources may be located in the
permit azea.
This activity may affect the following endangered species or their critical habitat: Colorado
River pikeminnow, bonytail chub, humpback chub, and razorback sucker. The activity may
also affect the bald eagle, a threatened species. The District Engineer has made this
determination based on information provided by the applicant and on the Corps' preliminary
investigation. The Corps of Engineers will consult with the U.S. Fish and Wildlife Service in
accordance with Section 7 of the Endangered Species Act.
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