Alturas Field Office

Lassen County Weed Management Area Project Map

Alturas Field office weed management area in Lassen County. For more information regarding the information in this map; contact the Alturas Field Office at 530-233-4666


Property Description
The Lassen County WMA Project encompasses 757,094 acres in Lassen County, California within the Alturas Field Office boundary. 110,187 of these acres are public lands managed by the BLM.  The vast majority of this land is Juniper and Sagebrush rangeland.

2011 Lassen County BLM Property Weed Inventory:

45,700 acres of BLM land in Lassen County were inventoried for noxious weeds during the 2011 field season. Below is a summary of the weed sites found and treated.



Table 1 - Lassen County Weed Points

#  Sites   

Weed Name

Acres

1

Perennial Pepperweed

0.001

2

Russian Knapweed

0.055

4

Dyers Woad

2.128

5

Mediterranean Sage

0.042

5

Spotted Knapweed

0.054

9

St Johnswort

1.120

10

Canada Thistle

0.787

15

Hoary Cress

5.993

24

Yellow Starthistle

0.546

47

Squarrose Knapweed

4.314

61

Houndstongue

14.406

266

Scoth Thistle

83.448

449

Totals

112.894


Table 2- 2011 Lassen County Weed Lines

# Sites

Weed Name

Acres

1

Scotch Thistle

6.162

2

Squarrose Knapweed

2.225

4

Houndstounge

8.335

7

Totals

16.721

 

Table 3- Lassen County Weed Polygons

# Sites

Weed Name

Acres

2

Houndstongue

144.825

10

Scotch Thistle

203.751

12

Totals

348.578

Altogether 468 weed sites were inventoried totaling 477.93 acres.