2005 California Desert Exotic Mustard Roadside Survey

Cal. Hwy 58 - March - April 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.






Cal. Hwy 58 - March - April 2005 - Raw data.

Results of a 70 mph windshield survey (or whatever the local speed limits were), of three exotic Mustards: 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. None of the three exotic Mustards of concern were 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. MED = In divided highways, in medians.

DES = One or more Exotic Mustards have 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.

SPECIES PRESENT:

BT = Brassica tournefortii = Sahara Mustard
SL = Sisymbrium irio = London Rocket
SO = Sisymbrium orientale = Indian Hedge 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)



KERN COUNTY, Cal. Hwy 58 , from town of Tehachapi to Barstow

Raw data March 18, 2005, updated April 1, and may be periodically updated.

Start east end of town of Tehachapi (PM 94.30)

95.00 - NS (but lots of tumbleweeds)
96.00 - NS (tumbleweeds solid)
97.00 - NS
98.00 - NS
99.00 - NS
100.00 - NS
101.00 - NS
(Cameron Road)
102.00 - NS
103.00 - NS
104.00 - NS
105.00 - NS
106.00 - NS
107.00 - NS
108.00 - NS

New Divided Freeway starts, with different PM numbers:

165 - NS (Junction of exit to town Mojave)
166 - NS
167 - NS
(Junction of Cal. Hwy. 14)
168 - NS
169 - NS
170 - NS
171 - NS
172 - NS
173 - NS (Lots of Amsinckia)
174 - NS (Lots of Amsinckia)

New highway rejoins old highway, and old PM numbers restarting:

118.50 - NS (Lots of Amsinckia)
119 - NS (Lots of Amsinckia)
120 - NS (Lots of Amsinckia)
121 - NS (Lots of Amsinckia, Phacelia
--excellent example of
what Mojave roadsides should look like)

122 - RS - SL scattered
123 - RS - SL scattered
124 - MED - SL
125 - NS
126 - NS (Amsinsckia and Phacelia in median)
127 - NS

California City turnoff
128 - NS (Amsinsckia)

Edward AFB exit
129 - MED - SL
130 - MED - SL
131 - MED - SL
132 - NS - (North Edwards exit)
133 - RS - BT & SL
134 - RS - BT & SL
135 - RS - BT & SL
136 - RS - BT & SL
137 - RS - BT & SL
138 - RS & MED - SL -
(Gephart exit)
139 - RS & MED - SL
- (Rest stop, SL mixed 50/50 with Des. Dandelion)
140 - RS & MED - SL
141 - RS & MED - SL
142 - RS & MED - SL

San Bernardino County line, Cal. Hwy 58

0.00 - NS
1 - RS - SL rare, scattered
2 - NS -
(Kramer Station - solid Amsinckia)
2.50- - NS
- (crossing railroad tracks)
3 - RS - SL
4 - RS - SL
5 - NS
- Jct. US 395, Kramer Junction
6 - RS - BT & SL
7 - RS - BT & SL
8 - RS - BT thick & SL
9 - RS - BT very thick
10 - RS - BT, north side
11 - RS - BT
12 - DES - BT and ONLY SITE of SO
13 - RS - BT - thick around creosotes
14 - DES - BT
15 - DES - BT
16 - FL - BT
17 - FL - BT
18 - FL - BT

Harper Lake

19 - FL - BT
20 - FL - BT
21 - FL - BT
22 - FL - BT
23 - RS - BT
(Road goes from 4 lanes to 2 lanes with no median)
24 - RS - BT & SL scattered
25 - RS - BT & SL
26 - RS - BT & SL thick in places

27 - RS & DES - BT & SL thick in places, going into ag. lands
28 - RS & DES - SL going 1/2 mile off roadside into ag. lands
29 - RS & DES - SL going into ag. lands -
(Dixie Road)
30 - RS & DES - SL going into desert -
(Lenwood Avenue)
31 - RS & DES - SL going into desert
- (Road goes from 2 lanes to 4 lanes, with a median)
32 - DES - SL in Mojave River-side ag. lands, solid. -
(Mojave River = PM 32.50)
33 - DES - BT
34 - DES - BT
34.50 - DES - BT
- Junction of Cal. Hwy. 247 in Barstow



Updated December 23, 2005 - BACK TO MAIN PAGE