2010-12-08_PERMIT FILE - C1981008A ‎(14)‎

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 12/8/2010
• Doc Name: Vegetation Information
• Section_Exhibit Name: Section 2.04.10 Vegetation Information NH2 Mine Area
• Media Type: D
• Archive: Yes

Field bindweed
Jointed goat grass
Canada thistle
Hairy whitetop
Russian Knapweed
Musk Thistle
(Convolvulus arvensis)
(Aegilops cylindrica)
(Cirsium arvense)
(Cardaria pubescens)
(Centaurea repens)
(Cardus nutans)
In addition four restricted noxious weeds were also found. They are:
Curly dock
Blue lettuce
Buckhorn plantain
Quackgrass
(Rumex crispus)
(Lactuca pulchella)
(Plantago lanceolata)
(Agropyron repens)
The above noxious weeds were determined from Appendix B to CDMG draft "Guidelines for
Compliance with Land Use and Vegetation Requirements for Coal Mining ".
6.2 Irrigated Pasture Type (IP) The irrigated pasture has been cleared of native vegetation
and planted to grasses and forbs by the various farms in the study area. All the irrigated
pastures are irrigated by means of flooding the fields from ditches. Irrigated pastures vary from
abandoned to highly productive. Some pastures, where irrigation water stands for prolonged
periods, is dominated with sedges and rush. Other abandoned pastures are dominated with
annual, bi- annual and noxious weeds. After consulting, in the field, with Harry Ranney,
Colorado Dept. of Minerals and Geology, it was determined that two pastures with reasonable
levels of management would be selected for sampling. One pasture was owned by Morgan
and the other by Benson. Both had been irrigated in the 1999 season and both had little to no
grazing influence. Results of cover, production and woody stem density were based on these
two pastures.
Perennial grasses dominated the irrigated pasture type with vegetative cover of 44.5 percent,
while perennial forbs accounted for nearly all of the remaining vegetative cover (33.3 percent).
Revised September 2010 (PR 06) 2.04.10 -57