2022-12-20_PERMIT FILE - C1981019A ‎(3)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 12/20/2022
• Doc Name: Volume 1 Rule 4
• Section_Exhibit Name: 4.01 Through 4.30
• Media Type: D
• Archive: Yes

RULE 4 PERFORMANCE STANDARDS

Rule 4 Performance Standards 4-44 Revision Date: 12/14/22
Revision No.: MR-245
50% of those acres representing high-density areas. The grazingland acres will not be subject to
woody plant density standards.

Tall Shrubs and Aspens
For the South Taylor reclamation areas, as part of the revegetation success criteria for those areas,
Colowyo will establish 18.5 acres of aspens and 12.0 acres of tall shrubs. This will be
accomplished through large singular plots or various small plots that add up the acres noted
previously. Tall shrubs plots will consist of, but may not contain all, of the following species to
be considered successful.

 Alderleaf Mountain Mahogany (Cercocarpus montanus)
 Chokecherry (Padus virginiana ssp. melanocarpa)
 Skunkbrush sumac (Rhus trilobata)
 Saskatoon serviceberry (Amelanchier alnifolia)
 Snowberry (Symphoricarpos sp.)

For the Collom reclamation areas, at the request of CPW, Colowyo will incorporate approximately
750 small size exclosures into Collom reclamation areas on 150 acres at a density of approximately
five exclosures per acre to meet their expectations for establishing tall shrub species.

Diversity
The revegetation objective for diversity will be to establish at least four native* perennial species,
each more than 3% composition, minimum of two of which are grasses and a minimum of one
which is a forb, with the following caveat;

If no single forb species exceeds 3% composition, the forb requirement can be met if:
a) at least two native* perennial forbs combined comprise at least 2% composition, or;
b) at least four native* perennial forbs combined comprise at least 1% composition.

The dominant species will contribute to the appropriate structure and stability of the post-mining
vegetative community to insure that the post-mining land use as addressed in Section 2.05.5.

4.15.9 Revegetation Success Criteria: Cropland

Colowyo does not impact any cropland areas; therefore, the requirements of this rule are not
applicable to Colowyo.

4.15.10 Revegetation Success Criteria: Previously Mined Areas: Areas to be Developed for
Industrial or Residential Use

Colowyo does not plan to develop any areas to industrial or residential use; therefore, the
requirements of this rule are not applicable to Colowyo.

4.15.11 Revegetation Sampling Methods and Statistical Demonstrations for Revegetation
Success Revegetation