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I-15 from Cajon Pass to Barstow - 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 = None Seen. 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)
SAN BERNARDINO COUNTY, I-15 from Barstow to Apple Valley
(PM markers, starts at Mojave River in Barstow PM 75.50) Notebook 197, pages 2-3
75 - RS scattered - East Main
74 - RS scattered - Cal. 247 exit
73 - NS - town Barstow
72 - RS - scattered - West Main exit, Barstow
71 - NS
Junction California Highway58
70 - NS
69 - RS - rare
Barstow, Lenwood exit
68 - DES rare, out 50 feet from roadsides
67 - DES rare - 50 feet from roadside
66 - DES scattered, out 100 feet from roadside - Outlet Center exit
Barstow city limits
65 - NS
64 - NS
63 - NS
62 - NS
61 - NS
60 - NS - Hodge Road
59 - NS
58 - NS
57 - NS
56 - NS - Wild Wash Road
55 - NS
54 - NS
53 - NS
(Power line crossing highway)
52 - NS - Apple Valley exit
Updated April 22, 2006 - BACK TO MAIN PAGE
Updated December 24, 2022 - The Reveg
Edge Ecological Restoration service