HomeMy WebLinkAbout3208; LEUCADIA 24' FORCE MAIN ON LA COSTA; TRANSMITTAL OF COPY OF THE LETTER REPORT ON VEGETATION; 1986-06-1932oS V
WILLDAN ASSOCIATES
ENGINEERS PLANNERS,
TraI nsmitta.,
TO: CITY OF CARLSBAD DATE 6/19/86
2075 Las Palmas Drive
Carlsbad, CA 92008 JOB NO. 6944
ATTENTION: Jeff Bunnell 0
We are forwarding 9 By Mail. ] By Messenger
Description -
Copy of the letter report on Vegetation subject to potential impacts
submdtted by Westec Services to the U.S. Army Corps. of Engineers.
Remarks
This Material is sent for El Checking El Your Files El Approval El Information
El Other 0
El Please sign Copies and return to our office.
COPIES TO: Gary Wayne
VERY TRULY YOURS
WILLDAN ASSOCIATES
Bob Sergeant
3633 CAMINO DEL RIO SOUTH, SUITE 207, SAN DIEGO, CA. 92108. (619) 281.9211
Potential Impacts to Vegetation Groups Along
La Costa Avenue
Five distinct vegetation groups would be subject to potential impacts as a
result of future grading operations for the proposed La Costa Avenue widening project.
These groups include wetlands vegetation types of brackish marsh, coastal salt marsh
and riparian woodland The wetlands vegetation types are considered sensitive and will
require mitigation measures. Non-sensitive vegetation groups include coastal sage
scrub, coastal mixed chaparral and disturbed. The majority of the project area is
comprised of disturbed areas These disturbed areas do not contain habitat that would
become wetlands if left alone, therefore, are not considered sensitive habitat
Roadway improvements along La Costa Avenue would be completed in two
phases Phase I involves improvements at the intersections of La Costa Avenue/1-5 and
La Costa Avenue/El Camino Real. Phase I widening would extend approximately 1200
feet east of 1-5 and 1,100 feet west of El Camino Real. Phase II would include the
realignment and widening of the remaining portion of La Costa Avenue between the two
intersections Table 1 lists the identified vegetation types and approximate acreage
(grouped according to phasing areas) subject to potential impacts as a result of the
proposed grading operations along La Costa Avenue The accompanying figures show
the approximate phasing boundaries and indentified vegetation types subject to poten-
tial impacts
Table 1
IDENTIFIED VEGETATION TYPES SUBJECT TO POTENTIAL IMPACTS
ALONG LACOSTA AVENUE
(in acres)
Habitat Type Phase I Phase U
Interstate 5 .E1 Camino Real
Brackish Marsh 0.0 ,- 0.4 1.0
Coastal Salt Marsh :0.2 : 0.4 0.1
Riparian Woodland 0.0 0.1. 0.4
Coastal Sage Scrub 0.0 * 0.0 0.3
Coastal Mixed 0.0 0.0 0.0*
Chaparral
Disturbed 1 9 0 6 3.7
*Less than 0.1 acre
WETLANDS BOUNDARY
FHAS E II /
HASE
.,.
\ \k ±\
/
ro
L91_3M. 0
FEET
-.
LEGEND 7' Brackish Marsh
- Coastal Salt Marsh
Riparian Woodland
Coastal Sage Scrub
Coastal Mined Chaparral
Riparian Woodland/Brackish Marsh
-, Disturbed
SOURCE: WEST EC Services, Inc., Wilidan Assoc., 1985, Vtn, 1985
FIGURI
Potential Impacts to Vegetation as a Result of Future Grading Operations
wTct
/ -
-' ,__• ---.-- .-
I
WETLANDS BOUNDARY
LA STA
SOURCE: WESTEC Services Inc., Wilidan Assoc., 1985, Vtn,1985
FIGURE
Potential Impacts to Vegetation as a Result of Future Grading Operations
" wrr •,.,
J 2
WETLANDS BOUNDARY
/
AVE.
60 9.64
go
PHASE 11
50
SOURCE WESTEC Services Inc Wilidan Assoc.,1985 Vtn 1985 FEET
J
FIGURE
Potential Impacts to Vegetation as a Result of Future Grading Operations
;-
-
•0
- -.---•-... - _. -.
-
-
WETLANDS BOUNDARY ( -- 7 7 (/
31
16 71
Ro
is
PHASE 11 'Th PHASEi
LEGEND: 30
—(! •/', \ \\
ckthMarsh
Coastal Salt Marsh \$
Riparian Woodland
N B Coastal Sage Scrub
Coastal Mixed Chaparral Riparian Woudland/8,ackleh Marsh
Disturbed
0 290
SOURCE: WESTEC Services, Inc., Wilidan Assoc., 1985, Vtn, 1985 REM
FEET
GURE
Potential Impacts to Vegetation as a Result of Future Grading Operations