2005 California Desert Exotic Mustard Roadside Survey

Interstate 10 - May 2005 - Raw data.

Surveyed and Copyright © 2005 by Craig Dremann

Box 361, Redwood City, CA 94064 - (650) 325-7333

Intellectual Property Notice: You are welcome to reprint this data, for your own personal use. However, if you want to distribute, reproduce, modify or incorporate this data into another product including maps, you need to obtain a license for use. Craig Dremann owns the title, copyright, and other intellectual propertiy rights on this data, and the data is licensed, not sold. Reprinting the data or utilizing it for economic purposes including projects funded by grants, without obtaining a license, the user agrees to pay liquidated damages of $100 per mile. Use of this web site constitutes your acceptance of this agreement, and Craig Dremann reserves the right to change the terms and conditions under which it offers this site. - Licenses are available for use of the data by researchers, universities, or agencies at $8 per mile.


I-10 PM 84 Riverside County at Hayfield Road exit, mustard density into desert.
Photo 5/18/095

I-10 PM 105 and Junction Cal. 177 Riverside County, showing density of mustard into desert, still very scattered. Photo 5/18/05

I-10 - May 2005 - Raw data.

Results of a 70 mph windshield survey (or whatever the local speed limits were), of Sahara mustard (Brassica tournefortii): Either not present; is present along roadsides or in medians; or is outside of the roadside to the fence line or has moved from the roadsides to infest adjacent land.

NS = No Sahara mustard was seen along roadside ditches; or if divided highway, also not seen in the roadside median, or in lands adjacent to the road.

RS = Road Sides were infested with Sahara mustard. MED = In divided highways, in medians.

DES = Sahara mustard has moved from the roadsides into the desert, agricultural areas, or other lands adjacent to the roadsides. FL = Only found along the highway cyclone-fence line, but is far enough off the roadside to pose an immediate problem for the lands adjacent to the fences. At the time of the survey, did not appear to be moving off the fence line yet.


BT = Brassica tournefortii or Sahara Mustard

PM = Post miles along highways, and numbers indicate the averages found not just at each post mile, but for 1/2 mile on either side of the post mile marker.

(Landmarks and other notes on other exotics or native plants will be in parentheses)

RIVERSIDE COUNTY, from JOSHUA TREE NP (the south Cottonwood exit) eastward.

Survey 5/18/2005, data to be posted later, notebook 194, pages 10-11

(Post miles)

82 -
83 -
84 -
85 -
Chiriaco Summit
86 -
87 -
88 -
89 - (Hayfield Road exit)
90 -
91 -
92 -
93 -
94 -
95 -
96 -
97 -
98 -
99 -
100 -
101 -
102 - (Eagle Mountain Road exit)
103 -
104 -
105 -

Junction of Cal. Hwy. 177

Updated September 7, 2005 - BACK TO MAIN PAGE