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REV07034
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REV07034
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Entry Properties
Last modified
8/25/2016 1:07:59 AM
Creation date
11/21/2007 9:39:19 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1994082
IBM Index Class Name
Revision
Doc Date
5/15/2005
Doc Name
Revegetation Plan Review
From
Dan Mathews
To
Mike Boulay
Type & Sequence
PR2
Media Type
D
Archive
No
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On page 5 paragraph 4, text states-that "the shrub planting program will be oriented <br />towards enhancement of islands where shrub cover will develop in the larger open <br />blocks". Comparison of current and proposed Post-Mining Vegetation Map Exhibit <br />22-1, indicates that, in addition to elimination of all 7 mature shrub transplant sites, <br />several upland shrub planting sites and one aspen planting site have also been <br />deleted. Please address the reasons for the proposed reduction in upland shrub and <br />aspen planting sites. <br />On page 7, it is stated that the haul road to the interior of the mine area will <br />regraded to a 50 foot shoulder to shoulder width, and retained as a permanent light <br />duty, limited access road. Under the current permit, a road width of 20 feet is <br />specified. A 50 foot width would seem to be excessive for a light use ranch road. <br />Please provide justification based on the post mine land use needs for the proposed <br />increase in road width from 20 feet to 50 feet. <br />Seedmixes and Planting Lists <br />5. We recommend consideration of certain modifications to the shrub component of <br />the Shrub Grassland seedmix (Mix 1A). Experience has shown that a relatively few <br />native shrub species can be expected to exhibit significant establishment from seed, <br />when included in standard rangeland seed mixtures in northwest Colorado. <br />Mountain big sagebrush, Seriphidium vaseyanum, is the one species that has <br />exhibited the most consistent success. The Division of Wildlife has indicated that <br />sagebrush grassland habitats are of high importance in the region due to their use by <br />a wide variety of wildlife species, and impacts to the type from agriculture and <br />development. For these reasons, we recommend that mountain big sagebrush be <br />included in Mix 1A, at a rate of 0.25 pounds per acre. The tall shrub species such <br />as serviceberry and chokecherry seldom exhibit a significant presence on reclaimed <br />areas when included in grass dominated seedmixes. SCC may want to consider <br />deleting these two species from Mix 1A, and including them only in Mix 5, for <br />concentrated shrub seeding areas. <br />6. Various shrub establishment approaches are discussed beginning on page 18. <br />Establishment of the tall shrub species included in the upland planting list, and the <br />tree and tall shrubs included in the aspen and mesic site planting lists, has proven to <br />be challenging on reclaimed sites. Primary limiting factors include moisture regime, <br />herbaceous competition, and intensive browsing of seedlings by deer and elk. We <br />request that SCC give consideration to the following recommendations, and provide <br />an appropriately amended section addressing methods to be employed in the various <br />shrub and tree establishment areas. <br />1 i Employ extensive surface roughening by dozer or track-hoe gouging; <br />2) Use a combination of seeding and planting in all concentrated tree and shrub <br />establishment areas. Broadcast seed all upland planting areas and aspen planting <br />areas with Seed Mix # 5. Consider inclusion of low-competitive native fortis in Mix <br />#5 for enhanced diversity; <br />3) Use elk fencing for aspen sites, mesic planting sites, and a number of upland <br />shrub planting sites; <br />
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