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HomeMy WebLinkAboutJune 14 OSC Final_Minutes18-0614.docx 1 Los Altos Hills Open Space Committee Los Altos Hills Parks and Recreation Building FINAL Minutes of special Meeting June 14, 2018 Members and Associates Present: Peter Brown, Richard Contreras, Nancy Couperus, Kit Gordon, Jean Struthers, Wendie Ward, Sue Welch (Members); Alice Sakamoto, Sharen Schoendorf (Associates) Members and Associates Absent: George Clifford (Member); Karen Lemes (Associate) Council Liaison Absent: Roger Spreen Member of Public Present: Jeff Wang (12735 Alto Verde Lane) 1. Call to Order and Approval of Minutes A. Roll Call. KG called the meeting to order at 9:02 am. B. Acceptance of Meeting Minutes. NC moved to accept with minor amendments the minutes from the meeting of May 8, 2018. PB seconded and the vote was 6 in favor (PB, RC, NC, KG, JS, SW) and WW abstaining (not present at April meeting). C. Announcements. i. Articles in Town Newsletter. OSC thanked KG for authoring two interesting articles in the last issue of the newsletter (on creeks and mountain lions). An article on the history of the Westwind Community Barn is planned for a future issue. 2. Planning A. OSC Site Reviews and Recommendations for Development Projects. i. 12375 Alto Verde Lane (Lands of Wang and Yu; APN 175-54-016; #208-17-ZP-SD). OSC reviewed this project in August 2017, with a recommendation to 1) label creek banks on the developers’ maps; 2) dedicate a riparian setback 25 feet from top on bank of Barron Creek on both sides of the creek (Concepcion Road side and parcel side); 3) dedicate an open space easement (OSE) as indicated by the line drawn on the map from the creek to include the canopy of the oaks along the eastern side of the creek (approximately along the 250 ft elevation line); and 4) remove invasive palm tree from creek. Purpose of OSE is protection of an incised tributary of Barron Creek running along the western part of the parcel, and protection of riparian vegetation including heritage oaks near the creek. Steep slopes (>30%) close to the building site were not required to be in OSE. The project was approved at the Fast Track meeting of April 24, 2018 with the OSE as recommended by OSC and required as a condition of approval. At today’s meeting, the developer, Jeff Wang, requested a reduction in the area of the OSE to accommodate fruit trees and an irrigation system. He argued that there is not a creek on his lot and this area is not steeply sloped. OSC reviewed Town policies and ordinances for protecting creeks, riparian vegetation, and heritage oaks with OSEs and discussed applicability of the policies to this parcel. It was noted that regulatory agencies consider the incised channel on this parcel (which has bed, banks, and OHWM) a tributary of Barron Creek (e.g., SCVWD creek map Attachment A). The development map (Attachment B) shows that the eastern border of the recommended (and approved) OSE along the 250-ft elevation line extends only about 6-8 feet beyond the canopy of the heritage oaks on the eastern side of the creek. It would be impractical to plant fruit trees and install an irrigation system under the oak canopy. JS moved that OSC reaffirm the original recommendation of Aug 2017 (and required as a condition of approval at the Fast Track meeting of April 24, 2018) for the OSE on 12375 Alto Verde to extend to the 250-ft elevation line. This initial recommendation is in conformance with General Plan policies to protect creeks, riparian vegetation and heritage oaks. SW seconded and the vote was unanimously in favor (PB, RC, NC, KG, JS, SW, WW). ii. 26201 Elena Subdivision (Lands of Tan; APN 182-05-039; TM18-0001). OSC discussed the draft review for this proposed 4-lot subdivision (Attachment C). The 6.8-acre site on the east side of Elena Road immediately adjacent to I-280 has an average slope is 26.7% with some areas in excess of 30% slope. Two large natural drainage swales trisect the parcel and join a deep channel that flows under the fence into a concrete drainage channel on Caltrans property. At site visit, OSC members observed incised channels, moist soil, and wetland plants in parts of the swales. The site has mature native trees and shrubs, as well as large infestations of invasive plants (acacia trees, stinkwort, Italian thistle). Wildlife was observed (fawns). Staff indicated that the proposed OSC Final_Minutes18-0614.docx 2 subdivision plan has a number of unresolved issues and OSC will have time for additional review. Draft OSC recommendations 6/24/18 (Attachment C) include request review of site geology reports, site visit during the rainy season to assess drainage; dedication of OSEs and riparian setbacks based on drainage findings; reduction in number of lots from four to two; early management of invasive plants; and removal of trash. iii. 13581 Wildcrest Drive (Lands of Sutaria & Capozzola; APN 175-36-021; SD18-0013). Reason for OSC review is construction of a new residence. OSC discussed the draft review (Attachment D) for this very steep parcel (avg slope 40%) with established oak woodland, drainage swales, and a tributary of Robleda Creek running along the southern border. Other issues include existing and proposed retaining walls, proposed removal of two heritage oaks, and a fence outside the property boundary. An OSE already exists on the parcel. OSC reviewed and discussed the plans. KG moved OSC recommend the Town ask the developer to modify the existing OSE to match the location of the existing retaining wall as shown on the figure on page 2 of the 6/14/18 Draft OSC Property Review and to make a special note to protect the oaks close to the house (#6, 8, 10, 11) during construction. PB seconded and the vote was unanimously in favor (PB, RC, NC, KG, JS, SW, WW). iv. 13439 Mandoli Drive (Lands of Dong and Wang; APN 175-42-026; SD18-0011). Reason for OSC review is an addition and major remodel. OSC discussed the draft review for this project (Attachment E). The parcel is a flag lot off the end of Mandoli that slopes up gently from the road with steeper slopes and an old roadbed at the rear of the lot. A drainage swale and catch basin are located on the NW side of the house. Native trees on the site include valley oak, coast live oak and toyon. Several tree species are mislabeled on the plans (e.g., “maples” are actually sycamores; “madrones” are toyon). Invasives on the site that should be removed include eucalyptus and acacia trees, tamarisk, broom, and Italian thistle. PB moved that OSC recommend the Town ask the developer to dedicate an OSE over the steep slope above the old road bed at the rear of the parcel as shown on the map (Attachment E) to protect the oaks and slopes >30%. Steep slopes >30% close to the building site need not be in OSE. WW seconded and the vote was unanimously in favor (PB, RC, NC, KG, JS, SW, WW). v. 10275 Kenbar Road (Lands of Luu; APN 331-17-020; #SD18-0020). Reason for OSC review is construction of a new residence. OSC discussed the draft review (Attachment F) for this project. This parcel is in the recently annexed part of southeast LAH and abuts Rancho San Antonio open space lands. The building site is relatively flat, but the parcel drops off steeply behind the house with slopes >30%. Swale at rear of property drains to Permanente Creek. There are heritage oaks, including a very old coast live oak over 6 ft in diameter. Although oaks #1, 2, 3 and 4 are not proposed for removal, the new house appears to impinge on their roots and canopies and may eventually kill them. Draft recommendations are: 1. Dedicate OSE at elevations below and west of the house over slopes >30% with mature oak trees. 2. Consider realigning house and excavated areas more closely with the existing house footprint to protect oaks, especially oaks #3 and #4 on diagram in 6/14/18 draft OSC Property Review 3. Remove old barbwire fencing on site and at southern border to meet current code. 4. Remove large stand of reed (Arundo donax spp or Phalaris arundaceae species) near and across western border. This plant is highly flammable, consumes large amounts of water, and is invasive. This plant typically grows in creek beds—it may be tapping a water source. NC moved that OSC send all recommendations listed in the 6/14/18 draft OSC Property Review to the Town with an added note expressing concerns about the proximity of the proposed new house to oaks #3 and #4. RC seconded and the vote was unanimously in favor (PB, RC, NC, KG, JS, SW, WW). vi. 26896 Alejandro Drive (Lands of Lam and Stepanov; APN 175-44-065; SD18-0015). Reason for OSC review is construction of a new residence. OSC discussed the draft review for this project (Attachment G). This steep (approx 30% slope) 1.2-acre lot is at the end of Alejandro with the west (uphill) border along La Cresta. The existing building site is relatively flat and flanked above and below by very steep sections with numerous mature oaks. EDPC reported that not all mature trees are shown on the developers map. A swale runs from La Cresta along the southern boundary (shown OSC Final_Minutes18-0614.docx 3 on SF EcoAtlas) that drains towards the Barron Creek watershed. There is a large catch basin and storm drain at the driveway entrance that should be cleared of debris. KG moved that OSC recommend the Town ask the developer to 1) dedicate OSE at elevations above, below, and to the north of the house over areas with slopes >30% with mature oak trees (as shown on map in 6/14/18 draft OSC Property Review; the objective is to have OSE areas contiguous); and 2) take measures to protect the mature Valley oak roots and canopy at driveway. NC seconded and the vote was unanimously in favor (PB, RC, NC, KG, JS, SW, WW). vii. 23281 Mora Heights (OSC reviewed in Jan 2018 and May 2018)—plans withdrawn. Not discussed viii. 25380 Becky Lane (approved without OSC review). OSC discussed whether this lot included a flood plain. It does not per FEMA maps. B. Fence Permit Reviews. i. 27835 Lupine. Staff addressed fence setbacks from Matadero Creek, which runs through this parcel. C. OSC recommendations to be adopted by Council. i. 14510 Manuella Road (reviewed March 2018) ii. 13120 East Sunset Drive (reviewed Aug 2016, May 2018) 3. New Business A. Guest speaker Ted Sayre, Town geologist. He will discuss LAH Hazard Map at the June July OSC meeting. B. Living with Wildlife Series. OSC discussed and put on the agenda for next month organizing or hosting a seminar or panel discussion covering common wildlife species in the hills. 4. Continuing Business A. Town weed management. OSC discussed planning and preparations for this summer’s Dittrichia spraying. A subcommittee (PB, RC, KG, SW) was formed to work on this with LAH Public Works Director, Allen Chen. OSC also discussed methods to address “private infestations (e.g., contacting residents with large infestations; engaging help from Fire District weed abatement program) and methods to map infestations and follow them year-to-year (ideally a Town-hosted GIS system). B. Grassroots Ecology update. Byrne Brigade workdays are continuing every Monday with focus on removal of milk thistle, purple star thistle, teasel, and Italian thistle and YST. New natives planted in the flood plain are flourishing and mulch is helping with weed control. C. Final Landscape Guide. PB, who has been revising this document, reported that EDPC approved the guide and it is now in staff hands D. Updates from other Town meetings. Council will review tentative map for Natoma subdivision on June 21, 2018. 5. Open Discussion 6. Communications from the Floor. None. 7. Adjournment. The meeting was adjourned at 11:10 am Next Regular Meeting: Thursday, July12, 2018 9:00 AM at LAH Parks and Recreation Building Attachment A: SCVWD creek map showing Barron Creek on 12375 Alto Verde Attachment B: Plans showing recommended OSE on 12375 Alto Verde Attachment C: Draft OSC recommendation for proposed 26201 Elena Subdivision Attachment D: OSC Property Review for 13581 Wildcrest Drive Attachment E: OSC Property Review for 13439 Mandoli Drive Attachment F: OSC Property Review for 10275 Kenbar Road Attachment G: OSC Property Review for 26896 Alejandro Drive Final minutes were approved with minor amendments (in red) at the Regular OSC meeting of July 12, 2018. OSC_Review12620Elena
Subdivision18‐0613.docx










8/22/18
1
 To:
Los
Altos
Hills
Planning
Department
 From:

Open
Space
Committee
 Date:
June
14,
2018
 Property
address:
26120
Elena
Road
Subdivision
(between

 Date
of
Site
Visit:
June
4,
2018
 
 

 Lands
of
Tan
APN
182­05­039
 Town
 Planner
 Steve
Padovan
Project
 Number
 TM18­0001
 
 Reason
for
review
(check
one)
  Subdivision
 New
Residence
 Second
Unit
 Addition/Major
Remodel
 Fence
Permit
 
 OSC
RECOMMENDATION
FOR
THIS
PROPERTY
 Date
of
OSC
review:
June
14,
2018
 Voting
of
review:
 DRAFT
OSC
recommendation:
 
 The
6.749
acre
irregularly­shaped
property
is
bordered
by
I­280
at
the
northeastern

 boundary
and
Elena
Road
on
the
southwestern

boundary.
The
average
slope
of
the
 parcel
is
26.65%,
with
Elena
Road
at
the
highest
elevation
(X
ft)
and
280
at
the
lowest
 (Y
ft).
Unnaturally

There
is
a
very
steep
drop­off
from
Elena
Road
(probably
the
result
 of
cut­and­fill
to
create
the
road
bed)
that
will
create
challenges
for
driveway
access.
 Two
large
natural
drainage
swales
cut
the
parcel
approximately
into
thirds.
The
swales
 angle
down
from
Elena
Road
and
widen
as
they
approach
the
flatter
terrain
on
the
 lower
elevations
and
join
in
a
deep
channel
that
flows
under
to
fence
onto
Caltrans
 property.

 A
storm
drain
culvert
diverts
water
from
Elena
Road
to
the
head
of
the
northern
swale.

 At
the
lowest
elevation
a
wet
habitat
area
exists
with
possible
artificial
fill.
Numerous
 incised
natural
drainage
channels
were
noted
at
lower
elevations
of
both
swales
 (beginning
approximately
half
way
down
from
Elena).
Most
of
the
channels
have
bed,
 banks,
and
high
water
mark
erosion.

 A
concrete
drainage
structure
runs
parallel
to
the
northeastern
border
along
the
full
 length
of
the
property
on
Caltrans
land
between
the
property
and
the
I­280
roadway.

 Moist,
possibly
hydric,
soil
and
wetland
vegetation
(both
facultative
and
obligate)
were
 found
in
both
swales
and
in
the
lower
wet
habitat
area.

 Vegetation
in
the
swale
areas
includes
a
number
of
plant
species
that
grow
in
moist
or
 wet
habitats
and/or
are
designated
as
obligate
or
facultative
wetland
indicator
species
 These
include
Iris
leaf
rush
(Juncus
xiphiodes;
obligate
wetland
species)
and
other
 OSC_Review12620Elena
Subdivision18‐0613.docx










8/22/18
2
 juncus
species;
rabbitfoot
grass
(Polypogon
monspeliensis);
poison
hemlock
(Conium
 maculatum);
and
cyperus
species.
 Significant
stands
of
non­native
invasive
plants
are
thriving
throughout
the
parcel
 Italian
thistle,
poison
hemlock,
acacia,
rabbitsfoot
grass.
Patches
of
Dittrichia
 (stinkwort)
are
also
present.
Numerous
heritage
oak
trees,
toyon,
native
coyote
brush
 and
native
clarkia
were
noted.

 A
pathway
easement
runs
along
the
Caltrans
fence
along
the
full
length
of
the
 northeastern
boundary
through
the
lower
wet
habitat
area.
 Recommendations:
 1. The
OSC
would
like
to
review
geology
reports
on
the
property
and
make
a
site
 visit
during
the
wet
season
to
assess
the
hydrology
of
the
site.
 2. OSC
recommends
waiting
to
establish
boundaries
for
open
space
easements
 (OSE)
until
the
site
can
be
investigated
during
the
wet
season.
At
minimum,
OSC
 recommends:
 •
Dedicate
an
OSE
over
both
swales
and
lower
wet
habitat
area
(or
area
deemed
 appropriate
after
a
wet­season
investigation).
 •
Dedicate
an
OSE
over
most
of
the
areas
with
slope
>
30%.
 •
Riparian
setback
25
feet
from
centerline
of
both
swales
and
from
top
of
bank
 of
any
channels
not
in
OSE.
 3. Merge
parcels
A&B
and
merge
parcels
C&D.
 4. Manage
invasive
plants:
Italian
thistle,
stinkwort,
poison
hemlock,
rabbitsfoot
 grass.
Consider
removing
acacia
trees,
which
are
considered
invasive?
 5. The
proposed
off­road
path
that
runs
along
the
northern
border
adjacent
to
 Caltrans
land
was
removed
from
the
Master
Path
Plan
Map
in
2005.
However,
 this
pathway
easement
must
not
be
obstructed
with
vegetation,
fencing,
or
other
 structures.
 6. Remove
numerous
car
tires,
car
batteries,
car
fender
and
other
debris.
 
 
 
 OSC_Review12620Elena
Subdivision18‐0613.docx










8/22/18
3
 The
areas
of
slope
greater
than
30%
are
shown
in
red
diagonal
lines.
The
colluvial
drainage
 swale
areas
are
outlined
with
blue.
 
 OSC_Review12620Elena
Subdivision18‐0613.docx










8/22/18
4
 
 
 SUPPORTING
INFORMATION
 
 SLOPE
AND
SOIL
 Average
slope
of
lot
____26.65%____
 Areas
with
slope
≥30%?
Yes
 Check
slope/LUF
worksheet
on
subdivisions
 Review
Geologic
Hazard
Report,
if
applicable.
Check
for
colluvial
soil,
earthquake
faults,
 springs,
seeps,
shallow
groundwater.
Two
large
colluvial
swales
exist.
 
 Safety
Policy
1.1
Open
space
easements,
zoning
and
other
land
use
regulations
shall
 be
used
to
limit
and,
in
some
cases,
prohibit
development
in
areas
of
unstable
terrain,
 active
fault
traces,
water
channels,
flood
plains,
excessively
steep
slopes
and
other
 areas
determined
to
be
hazardous
to
public
welfare
and
safety.
 Safety
Policy
2.2
Locate
development
so
as
to
avoid
geologic
hazards,
including
 slope
instability,
to
the
maximum
extent
feasible.


 Land
Use
Policy
2.5
Steep
slopes,
canyons
and
ravines
generally
in
excess
of
30%
 slope,
as
well
as
natural
swales
and
drainage
channels,
and
geologic
hazard
areas
 within
areas
designated
for
residential
development
shall
be
left
undisturbed
and
 preserved
in
their
natural
condition
to
the
maximum
extent
feasible.
 Land
Use
Policy
2.6
Limits
on
the
development
of
individual
residential
lots
shall
be
 determined
based
on
evaluation
of
such
factors
as
natural
vegetation,
topographic
 characteristics,
soils
and
geology.

 
 CREEKS
 Creeks
or
waterways
or
swale
on
parcel?

Name
of
creek/tributary
of:
Flows
to
Robleda
 Creek
on
the
east
and
Deer
Creek
to
the
west.
 Shown
on
USGS
map?

SCVWD
creek
map?

LAH
Hazard
Map?

EcoAtlas?
No
 Condition
of
banks?
Shallow
and
wide.
 Existing
riparian
or
OSE
or
SCVWD
easement
along
creek
on
this
property
or
nearby
parcels?
 No
existing
OSE.
 Does
SCVWD
want
to
expand
their
easement?
 Proposed
setbacks
for
structures?

 Evidence
of
bed,
banks,
or
Original
High
Water
Mark
(OHWM)?
Evidence
of
banks
&
OHWM
 Identify
any
structures
including
fences
within
25
feet
of
top
of
bank?
Within
OHWM?
 Area
within
the
OHWM
are
regulated
as
Waters
of
the
United
States
and
protected
by
the
 Clean
Water
Act.
Any
development,
vegetation
removal,
or
stream
bank
modifications
within
 this
area
may
require
permits
from
regulatory
agencies:
US
Army
Corps
of
Engineers,
CA
Dept
 of
Fish
and
Wildlife,
Regional
Water
Quality
Control
Board.
 
 OSC_Review12620Elena
Subdivision18‐0613.docx










8/22/18
5
 
 Source:
US
Army
Corps
of
Engineers
 
 Safety
Policy
3.1:
Leave
natural
channels
and
flood
plains
in
a
natural
state,
 unencumbered
by
development
to
the
maximum
extent
feasible.
 Conservation
Policy
5.1:
Keep
or
restore
major
drainage
courses
in
their
natural
 condition
insofar
as
possible
because
of
their
importance
in
supplying
major
 vegetation,
land
forms
and
wildlife
habitat,
and
storm
drainage.
 Conservation
Policy
1.3:
Preserve
the
integrity
of
riparian
corridors
as
unique
and
 environmentally
sensitive
resources.
 Conservation
Policy
3.1:
Maintain
and
protect
creeks
and
riparian
corridors
for
 wildlife
that
use
this
resource
for
food,
shelter,
migration
and
breeding.
 Conservation
Policy
11.5:
Ensure
that
development
projects
are
designed
to
conserve
 the
natural
slope,
preserve
existing
native
vegetation,
limit
invasive
species,
and
 conserve
natural
drainage
channels
and
swales.
 
 Municipal
Code
10­2.702
Siting.
 (e)
Creek
Protection.
Structures
shall
be
set
back
a
minimum
of
twenty‐five
(25)
feet
 from
the
top
of
bank
of
all
creeks.
Greater
setbacks
may
be
required
along
major
creeks
 in
the
Town;
however,
lesser
setbacks
may
be
allowed
where
approved
by
the
Planning
 Commission.
Improvements
required
to
all
creeks
shall
be
accomplished
to
appear
 natural
and
to
maintain
the
natural
meandering
course
of
the
existing
creek.
Creeks
 and
banks
shall
be
protected
so
as
to
remain
in
their
natural
state
as
much
as
possible.
 They
should
not
be
disturbed
by
the
building
or
grading
process.
No
grading
shall
be
 allowed
in
creeks
or
within
the
required
setbacks
from
top
of
bank.
Siting
of
structures
 shall
be
done
with
safety
as
a
primary
concern.
Safety
concerns
and
preservation
of
 riparian
habitat
are
required
to
be
simultaneously
addressed
when
designing
 development
and
required
improvements
to
creeks.
(§
15,
Ord.
299,
eff.
December
11,
 1985;
§§
6,
7,
Ord.
370,
eff.
May
20,
1994;
§
1,
Ord.
504,
eff.
October
28,
2006)
 
 
 TREES,
NATIVE
VEGETATION
&
INVASIVE
PLANTS
 OSC_Review12620Elena
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8/22/18
6
 Heritage
oaks?
Yes,
several
 Significant
trees?
Groves
of
significant
trees?
Mature
oak
trees
and
non­native
species
 Trees
proposed
for
removal
(number
and
species)?
Unknown.
 Significant
native
vegetation?
Yes,
native
toyon
and
other
chaparral
and
woodland
species.

 Significant
invasive
pest
plant
vegetation?
 Note
major
infestation
of
invasive
weeds
such
as
stinkwort,
oxalis,
Italian
thistle,
purple
 starthistle,
yellow
starthistle,
pampas
grass,
broom,
teasel,
giant
reed
(Arundo
donax),
poison
 hemlock,
etc.
 
 Conservation
Policy
2.2:
Minimize
disturbance
of
the
natural
terrain
and
vegetation.

 Preserve
and
protect
native
and
naturalized
plants,
with
special
attention
to
 preservation
of
unique,
rare
or
endangered
species
and
plant
communities
such
as
 oak
woodlands.

 Conservation
Policy
2.3:
Preserve
and
protect
Heritage
Trees,
including
native
oaks
 and
other
significant
trees,
on
public
and
private
property.


 Conservation
Policy
11.5:
Ensure
that
development
projects
are
designed
to
conserve
 the
natural
slope,
preserve
existing
native
vegetation,
limit
invasive
species,
and
 conserve
natural
drainage
channels
and
swales.
 Conservation
Program
2.5
Encourage
the
dedication
of
conservation/open
space
 easements
or
the
public
acquisition
of
areas
that
are
rich
in
wildlife
or
of
a
fragile
 ecological
nature
to
ensure
their
protection
 Open
Space
Policy
1.2:
Protect
and
maintain
those
areas
necessary
to
the
integrity
of
 natural
resources
and
processes,
with
special
emphasis
on,
but
not
limited
to,
the
 groundwater
recharge
and
drainage
system,
open
spaces
vital
for
wildlife
 habitat,
open
spaces
suitable
for
agriculture,
and
other
areas
of
major
or
unique
 ecological
significance.
 Land
Use
Program
2.3
Encourage
the
preservation
of
existing
trees,
rock
 outcroppings,
ridgelines
and
other
significant
natural
features
 
 Municipal
Code
10­2.702
Siting.
 (f)



Tree
Preservation.
Every
feasible
attempt
should
be
made
to
preserve
existing
 trees
except
those
trees
identified
in
the
Los
Altos
Hills
Landscape
Guidelines
invasive
 plant
 
 CA
FOOD
AND
AGRICULTURAL
CODE
­
FAC
 DIVISION
4.
PLANT
QUARANTINE
AND
PEST
CONTROL
[5001
­
8808]
 5401.


 Any
premises,
plants,
conveyances
or
things
which
are
infected
or
infested
with
any
 pest,
or
premises
where
any
pest
is
found,
are
a
public
nuisance,
and
shall
be
 OSC_Review12620Elena
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8/22/18
7
 prosecuted
as
such
in
all
actions
and
proceedings.
All
remedies
which
are
given
by
law
 for
the
prevention
and
abatement
of
a
nuisance
apply
to
such
a
public
nuisance.
 
 
 WILDLIFE
CORRIDORS
&
FENCING
 Check
2006
Live
Oak
Associates
map
(not
official)
 Evidence
of
wildlife
(e.g.,
deer
trails,
spoor)?
Yes,
several
animal
trails
and
animals
on
site
 Identify
location
and
type
of
existing
fencing:
None.
 Check
that
fencing
on
plans
agrees
with
fencing
on
the
ground
 Note
any
fence
that
does
not
meet
current
fencing
regulations
 
 Conservation
Policy
2.7:
Avoid
the
development
of
environmentally
sensitive
areas
 that
are
rich
in
wildlife
or
of
a
fragile
ecological
nature,
such
as
areas
of
rare
or
 endangered
species
of
plants,
or
riparian
areas.

 Conservation
Goal
3:
Maintain
and
enhance
the
integrity
of
wildlife
habitat.
 Conservation
Program
3.3:
Assess
the
potential
for
development
patterns
to
 fragment
and
isolate
significant
wildlife
habitats.
 Conservation
Section
315:
Planning
for
natural
movement
of
wildlife
can
help
 avoid,
minimize
and
compensate
for
serious
negative
impacts
on
wildlife
and
humans.

 Areas
that
link
wildlife
habitat
have
become
vital
because
native
animals
such
as
deer,
 fox,
bobcat,
and
coyote
are
prevented
by
roads,
fences,
homes
and
other
development
 from
moving
freely
as
they
once
did.
 
 Municipal
Code
10­1.507
(d)
Prohibited
Fences,
Walls,
Gates,
and
Column
Types.
The
 following
fences
are
prohibited:
 (1)



Chain‐link
or
cyclone
fences,
including
any
fence
with
bare
lengths
of
wire
 stretched
between
metal
poles,
with
the
exception
of
dark
green,
black,
or
brown
vinyl‐ coated
chain‐linked
fences
with
matching
vinyl‐coated
cross
bars
and
caps.
 (2)



Barbed
or
razor
wire
fences,
including
any
fence
with
attached
barbs,
sharp
 points,
or
razors.
Electric
fences,
including
any
fence
designed
to
produce
an
electric
 shock,
except
where
necessary
for
animal
husbandry
operations.
 (3)



Any
fence,
wall,
and/or
gate
that
may
cause
harm
to
people,
pets,
and/or
wildlife
 due
to
points,
spikes,
or
sharpened
edges
on
the
top
or
bottom
part
of
the
fence,
wall
 structure
and/or
gate.
 
 (9)



Open
Space/Conservation
Easement
Perimeter
Fences.
 (i)

Maximum
height
of
open
space/conservation
easement
perimeter
fences:
six
(6)
ft.
 (ii)

Minimum
distance
of
lowest
fence
strand
or
rail
from
ground:
twelve
(12)
inches
 above
grade.
 OSC_Review12620Elena
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8/22/18
8
 (iii)

Open
space/conservation
easement
perimeter
fences
shall
provide
openings
 sufficient
to
accommodate
the
free
passage
of
wildlife
through
the
easement.
A
split‐ rail
wood
fence
(see
exhibit)
or
equivalent
design
shall
be
required.
Where
a
pathway
 is
located
within
an
open
space/conservation
easement,
the
perimeter
fence
shall
be
 required
to
have
at
least
two
(2)
openings
at
least
as
wide
as
the
width
of
the
pathway
 easement.
 
 (10)

Any
fence
crossing
or
intersecting
an
officially
designated
wildlife
corridor
shall
 conform
to
the
requirements
specified
above
for
an
open
space/conservation
easement
 perimeter
fence.
 
 
 
 OPEN
SPACE
EASEMENTS
(OSE)/CONSERVATION
EASEMENTS
(CE)
 Check
Town
records
for
existing
CE
or
OSE
on
this
property
and
adjacent
and
nearby
parcels.
 Identify
areas
where
OSE
are
recommended
(slope
≥30%,
significant
trees,
wildlife
corridor,
 creeks,
drainage
swales)
 Open
Space
Policy
1.1
Provide,
during
the
development
process,
for
the
maximum
 feasible
preservation
of
open
space
in
and
adjoining
the
Town,
with
spaces
ranging
in
 size
from
regional
scale
to
small‐scale
open
space
on
individual
lots.
 Open
Space
Policy
1.4:
Preserve
the
natural
beauty
and
minimize
disturbance
of
the
 natural
terrain
and
vegetation.
 Open
Space
Policy
1.7:
To
the
extent
possible,
link
open
spaces
together
visually
and
 physically
to
form
a
system
of
open
spaces.
 Open
Space
Policy
1.8:
Ensure
that
land
uses
and
structures
are
compatible
with
the
 general
open
space
quality
of
the
planning
area.
 Open
Space
Policy
2.6
New
residential
subdivisions
shall
provide
open
space
for
 recreation
in
order
to
meet
their
appropriate
share
of
local
recreation
needs.
 
 OSC_Review12620Elena
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8/22/18
9
 PATHWAY
EASEMENTS
(PE)
 Check
Town
records
for
existing
or
newly
proposed
PE
on
this
property
or
adjacent
and
 nearby
parcels.

 Pathway
easement
exists
at
the
northeast
boundary
with
a
width
of
~10
feet
at
the
 western
boundary
expanding
to
~50
feet
at
the
southern
boundary.

 
 Attachments:
 ‐ Photos
from
site
 ‐ Easement
history
and
research
 ‐ Photo
of
site
plan
with
marked
OSE
 FOLLOW­UP

 Send
final
copy
to
OSC
Chair
&
Secretary
 Upload
to
TraKit
?
 Add
address
to
list
of
easements
to
track
on
OSC
agenda

 
 
 
 
 
 OSC_Review12620Elena
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8/22/18
10
 
 
 
 Portion
of
storm
drain
culvert
from
Elena
Road.

 OSC_Review12620Elena
Subdivision18‐0613.docx










8/22/18
11
 
 
 Poison
hemlock
and
acacia
in
lower
wet
habitat
region
 
 OSC_Review12620Elena
Subdivision18‐0613.docx










8/22/18
12
 
 
 
 
 
 OSC_Review12620Elena
Subdivision18‐0613.docx










8/22/18
13
 Wetland
Cyperus
spp
 
 Wetland
Rush
 
 OSC Site Review 13581 Wildcrest.docx 8/18/18 1 To: Los Altos Hills Planning Department From: Open Space Committee Date: June 14, 2018 Property address: 13581 Wildcrest Drive Date of Site Visit: May 31, 2018 Lands of Sutaria & Capozzola APN 175-36-021 Town Planner Suzanne Availa Project Number SD18-0013 Reason for review (check one) ü New Residence Second Unit Addition/Major Remodel Fence Permit OSC RECOMMENDATION FOR THIS PROPERTY Date of OSC review: June 14, 2018 Voting of review: Unanimously in favor (RC, WW, NC, SW, JS, RC, PB, KG) Absent (GC) Final OSC recommendation: The property is a steep (~40%) 1.15 net acre lot that has had significant cut & fill & retaining wall construction. The plan proposes to cut and export ~3400 cy of soil and redo retaining walls. A tributary to Robelda Creek traverses the southern boundary. An open space easement exists on the lower southern third of the property but with a loopy boundary that does not correspond with existing cut/filled contours. There are swales and open spaces easements on west and east boundaries of the property covering steep slopes and established oak woodlands. Two significant oaks trees (#7, #9) are planned for removal. Swales near western and southern boundary drains to Robleda Creek. Recommendations: 1. Redraw the Open Space Easement to match the existing fill contours at the border of lower retaining wall and oak canopy; approximately between elevation lines 340 & 350. 2. Riparian setback 25 feet from southern border. 3. Remove chain link fence at western boundary. The fence appears to be connected to this site but is just outside the property boundary. 4. How will proposed drainage system traverse lower retaining wall? Will this wall be removed? 5. Concerns about eastern building abutting edge of OSE and under oak canopy – how can oaks be protected? OSC Site Review 13581 Wildcrest.docx 8/18/18 2 OSC Site Review 13581 Wildcrest.docx 8/18/18 3 Blue line is Robleda Creek OSC Site Review 13581 Wildcrest.docx 8/18/18 4 SUPPORTING INFORMATION SLOPE AND SOIL Average slope of lot ____40%____ Areas with slope ≥30%? Yes Check slope/LUF worksheet on subdivisions Review Geologic Hazard Report, if applicable. Check for colluvial soil, earthquake faults, springs, seeps, shallow groundwater. Safety Policy 1.1 Open space easements, zoning and other land use regulations shall be used to limit and, in some cases, prohibit development in areas of unstable terrain, active fault traces, water channels, flood plains, excessively steep slopes and other areas determined to be hazardous to public welfare and safety. Safety Policy 2.2 Locate development so as to avoid geologic hazards, including slope instability, to the maximum extent feasible. Land Use Policy 2.5 Steep slopes, canyons and ravines generally in excess of 30% slope, as well as natural swales and drainage channels, and geologic hazard areas within areas designated for residential development shall be left undisturbed and preserved in their natural condition to the maximum extent feasible. Land Use Policy 2.6 Limits on the development of individual residential lots shall be determined based on evaluation of such factors as natural vegetation, topographic characteristics, soils and geology. CREEKS Creeks or waterways or swale on parcel? Name of creek/tributary of: Robleda Shown on USGS map? SCVWD creek map? LAH Hazard Map? EcoAtlas? YES Condition of banks? We did not go down to creek. Existing riparian or OSE or SCVWD easement along creek on this property or nearby parcels? Existing OSE on eastern and western and southern boundaries. Does SCVWD want to expand their easement? Proposed setbacks for structures? Evidence of bed, banks, or Original High Water Mark (OHWM)? Identify any structures including fences within 25 feet of top of bank? Within OHWM? Area within the OHWM are regulated as Waters of the United States and protected by the Clean Water Act. Any development, vegetation removal, or stream bank modifications within this area may require permits from regulatory agencies: US Army Corps of Engineers, CA Dept of Fish and Wildlife, Regional Water Quality Control Board. OSC Site Review 13581 Wildcrest.docx 8/18/18 5 Source: US Army Corps of Engineers Safety Policy 3.1: Leave natural channels and flood plains in a natural state, unencumbered by development to the maximum extent feasible. Conservation Policy 5.1: Keep or restore major drainage courses in their natural condition insofar as possible because of their importance in supplying major vegetation, land forms and wildlife habitat, and storm drainage. Conservation Policy 1.3: Preserve the integrity of riparian corridors as unique and environmentally sensitive resources. Conservation Policy 3.1: Maintain and protect creeks and riparian corridors for wildlife that use this resource for food, shelter, migration and breeding. Conservation Policy 11.5: Ensure that development projects are designed to conserve the natural slope, preserve existing native vegetation, limit invasive species, and conserve natural drainage channels and swales. Municipal Code 10-2.702 Siting. (e) Creek Protection. Structures shall be set back a minimum of twenty-five (25) feet from the top of bank of all creeks. Greater setbacks may be required along major creeks in the Town; however, lesser setbacks may be allowed where approved by the Planning Commission. Improvements required to all creeks shall be accomplished to appear natural and to maintain the natural meandering course of the existing creek. Creeks and banks shall be protected so as to remain in their natural state as much as possible. They should not be disturbed by the building or grading process. No grading shall be allowed in creeks or within the required setbacks from top of bank. Siting of structures shall be done with safety as a primary concern. Safety concerns and preservation of riparian habitat are required to be simultaneously addressed when designing development and required improvements to creeks. (§ 15, Ord. 299, eff. December 11, 1985; §§ 6, 7, Ord. 370, eff. May 20, 1994; § 1, Ord. 504, eff. October 28, 2006) TREES, NATIVE VEGETATION & INVASIVE PLANTS Heritage oaks? Yes, several Significant trees? Groves of significant trees? Several oak trees and non-native species Trees proposed for removal (number and species)? Two significant oak trees planned for removal. Redwood trees also planned for removal as well as other non-native trees. OSC Site Review 13581 Wildcrest.docx 8/18/18 6 Significant native vegetation? Yes, native toyon and other chaparral and woodland species. Significant invasive pest plant vegetation? Note major infestation of invasive weeds such as stinkwort, oxalis, Italian thistle, purple starthistle, yellow starthistle, pampas grass, broom, teasel, giant reed (Arundo donax), poison hemlock, etc. Conservation Policy 2.2: Minimize disturbance of the natural terrain and vegetation. Preserve and protect native and naturalized plants, with special attention to preservation of unique, rare or endangered species and plant communities such as oak woodlands. Conservation Policy 2.3: Preserve and protect Heritage Trees, including native oaks and other significant trees, on public and private property. Conservation Policy 11.5: Ensure that development projects are designed to conserve the natural slope, preserve existing native vegetation, limit invasive species, and conserve natural drainage channels and swales. Conservation Program 2.5 Encourage the dedication of conservation/open space easements or the public acquisition of areas that are rich in wildlife or of a fragile ecological nature to ensure their protection Open Space Policy 1.2: Protect and maintain those areas necessary to the integrity of natural resources and processes, with special emphasis on, but not limited to, the groundwater recharge and drainage system, open spaces vital for wildlife habitat, open spaces suitable for agriculture, and other areas of major or unique ecological significance. Land Use Program 2.3 Encourage the preservation of existing trees, rock outcroppings, ridgelines and other significant natural features Municipal Code 10-2.702 Siting. (f) Tree Preservation. Every feasible attempt should be made to preserve existing trees except those trees identified in the Los Altos Hills Landscape Guidelines invasive plant CA FOOD AND AGRICULTURAL CODE - FAC DIVISION 4. PLANT QUARANTINE AND PEST CONTROL [5001 - 8808] 5401. Any premises, plants, conveyances or things which are infected or infested with any pest, or premises where any pest is found, are a public nuisance, and shall be prosecuted as such in all actions and proceedings. All remedies which are given by law for the prevention and abatement of a nuisance apply to such a public nuisance. WILDLIFE CORRIDORS & FENCING Check 2006 Live Oak Associates map (not official) Evidence of wildlife (e.g., deer trails, spoor)? Yes, several animal trails on E, W & S portions Identify location and type of existing fencing: Old segment of chain link in OSE near W border. Chain link fence along lower retaining wall/fill section. Check that fencing on plans agrees with fencing on the ground OSC Site Review 13581 Wildcrest.docx 8/18/18 7 Note any fence that does not meet current fencing regulations Conservation Policy 2.7: Avoid the development of environmentally sensitive areas that are rich in wildlife or of a fragile ecological nature, such as areas of rare or endangered species of plants, or riparian areas. Conservation Goal 3: Maintain and enhance the integrity of wildlife habitat. Conservation Program 3.3: Assess the potential for development patterns to fragment and isolate significant wildlife habitats. Conservation Section 315: Planning for natural movement of wildlife can help avoid, minimize and compensate for serious negative impacts on wildlife and humans. Areas that link wildlife habitat have become vital because native animals such as deer, fox, bobcat, and coyote are prevented by roads, fences, homes and other development from moving freely as they once did. Municipal Code 10-1.507 (d) Prohibited Fences, Walls, Gates, and Column Types. The following fences are prohibited: (1) Chain-link or cyclone fences, including any fence with bare lengths of wire stretched between metal poles, with the exception of dark green, black, or brown vinyl- coated chain-linked fences with matching vinyl-coated cross bars and caps. (2) Barbed or razor wire fences, including any fence with attached barbs, sharp points, or razors. Electric fences, including any fence designed to produce an electric shock, except where necessary for animal husbandry operations. (3) Any fence, wall, and/or gate that may cause harm to people, pets, and/or wildlife due to points, spikes, or sharpened edges on the top or bottom part of the fence, wall structure and/or gate. (9) Open Space/Conservation Easement Perimeter Fences. (i) Maximum height of open space/conservation easement perimeter fences: six (6) ft. (ii) Minimum distance of lowest fence strand or rail from ground: twelve (12) inches above grade. (iii) Open space/conservation easement perimeter fences shall provide openings sufficient to accommodate the free passage of wildlife through the easement. A split- rail wood fence (see exhibit) or equivalent design shall be required. Where a pathway is located within an open space/conservation easement, the perimeter fence shall be required to have at least two (2) openings at least as wide as the width of the pathway easement. OSC Site Review 13581 Wildcrest.docx 8/18/18 8 (10) Any fence crossing or intersecting an officially designated wildlife corridor shall conform to the requirements specified above for an open space/conservation easement perimeter fence. OPEN SPACE EASEMENTS (OSE)/CONSERVATION EASEMENTS (CE) Check Town records for existing CE or OSE on this property and adjacent and nearby parcels. Identify areas where OSE are recommended (slope ≥30%, significant trees, wildlife corridor, creeks, drainage swales) Significant OSE on western property border extends nearly the entire length of property. Open Space Policy 1.1 Provide, during the development process, for the maximum feasible preservation of open space in and adjoining the Town, with spaces ranging in size from regional scale to small-scale open space on individual lots. Open Space Policy 1.4: Preserve the natural beauty and minimize disturbance of the natural terrain and vegetation. Open Space Policy 1.7: To the extent possible, link open spaces together visually and physically to form a system of open spaces. Open Space Policy 1.8: Ensure that land uses and structures are compatible with the general open space quality of the planning area. Open Space Policy 2.6 New residential subdivisions shall provide open space for recreation in order to meet their appropriate share of local recreation needs. PATHWAY EASEMENTS (PE) Check Town records for existing or newly proposed PE on this property or adjacent and nearby parcels. Attachments: - Photos from site - Easement history and research - Photo of site plan with marked OSE FOLLOW-UP Send final copy to OSC Chair & Secretary Upload to TraKit ? Add address to list of easements to track on OSC agenda OSC Site Review 13581 Wildcrest.docx 8/18/18 9 OSC Site Review 13581 Wildcrest.docx 8/18/18 10 OSC Site Review 13439 Mandoli.docx 8/18/18 1 To: Los Altos Hills Planning Department From: Open Space Committee Date: June 14, 2018 Property address: 13439 Mandoli Drive Date of Site Visit: June 12, 2018 Lands of Dong & Hwang APN 175-42-026 Town Planner Suzanne Avila Project Number SD18-0011 Reason for review (check one) New Residence Second Unit ü Addition/Major Remodel Fence Permit OSC RECOMMENDATION FOR THIS PROPERTY Date of OSC review: June 14, 2018 Voting of review: Unanimously in favor (RC, WW, NC, SW, JS, RC, PB, KG) Absent (GC) Final OSC recommendation: The property is a ~18% 1.07 acre lot. The proposed remodel adds a basement and second story increasing the MFA from 3006 sqft to 5703 sqft and MDA from 7547 sqft to 10218 sqft. The property gently slopes up from the road and driveway with a steeper section at rear of lot. There appears to be an old road behind the house with slopes ~30% both above and below the old road. Evidence of wildlife near the rear of house (deer scat, coyote scat, fur, bones). Fencing exists only around the pool area. Drainage swale along NW side of house. There is drainage catch basin near the driveway in shallow drainage swale that drains to Barron Creek. Several oaks trees (live & valley) and native toyon grow on this property. Some trees are mislabeled on the plan: the trees labeled “maple” are actually sycamores; the trees marked “madrones” are toyons. There are several non-native invasive plants that may need to be removed including: large eucalyptus trees, several acacia trees, tamarisk, scotch broom (along driveway) and Italian thistle. Recommendations: 1. Open Space Easement (OSE) at elevations on and above the old road/flatter area on slopes with >30% and mature oak trees. 2. Evaluate and remove invasive plant species: eucalyptus, acacia, tamarisk, Italian thistle. 3. Minimize fencing near the proposed OSE. 4. Minimize development and landscaping on the drainage swale, north of house, in line with culvert under driveway. OSC Site Review 13439 Mandoli.docx 8/18/18 2 Suggested OSE shown in red at rear of house. Drainage area marked but not recommended for OSE. OSC Site Review 13439 Mandoli.docx 8/18/18 3 old road/flat section, lined with toyon, oaks and acacia OSC Site Review 13439 Mandoli.docx 8/18/18 4 Evidence of wildlife; bones, trails, scat (deer, coyote) and fur OSC Site Review 13439 Mandoli.docx 8/18/18 5 Large mature Valley oaks OSC Site Review 13439 Mandoli.docx 8/18/18 6 Invasive plants broom, acacia, tamarisk OSC Site Review 13439 Mandoli.docx 8/18/18 7 shallow drainage swale and culvert OSC Site Review 13439 Mandoli.docx 8/18/18 8 SUPPORTING INFORMATION SLOPE AND SOIL Average slope of lot ____~18%____ Areas with slope ≥30%? Yes at rear (western) boundary of lot Check slope/LUF worksheet on subdivisions Review Geologic Hazard Report, if applicable. Check for colluvial soil, earthquake faults, springs, seeps, shallow groundwater. Safety Policy 1.1 Open space easements, zoning and other land use regulations shall be used to limit and, in some cases, prohibit development in areas of unstable terrain, active fault traces, water channels, flood plains, excessively steep slopes and other areas determined to be hazardous to public welfare and safety. Safety Policy 2.2 Locate development so as to avoid geologic hazards, including slope instability, to the maximum extent feasible. Land Use Policy 2.5 Steep slopes, canyons and ravines generally in excess of 30% slope, as well as natural swales and drainage channels, and geologic hazard areas within areas designated for residential development shall be left undisturbed and preserved in their natural condition to the maximum extent feasible. Land Use Policy 2.6 Limits on the development of individual residential lots shall be determined based on evaluation of such factors as natural vegetation, topographic characteristics, soils and geology. CREEKS Creeks or waterways or swale on parcel? Name of creek/tributary of: Small swale drains to Barron Creek Shown on USGS map? SCVWD creek map? LAH Hazard Map? EcoAtlas? No Condition of banks? No banks but swales drain toward Barron watershed. Existing riparian or OSE or SCVWD easement along creek on this property or nearby parcels? None. Does SCVWD want to expand their easement? Proposed setbacks for structures? Evidence of bed, banks, or Original High Water Mark (OHWM)? Identify any structures including fences within 25 feet of top of bank? Within OHWM? Area within the OHWM are regulated as Waters of the United States and protected by the Clean Water Act. Any development, vegetation removal, or stream bank modifications within this area may require permits from regulatory agencies: US Army Corps of Engineers, CA Dept of Fish and Wildlife, Regional Water Quality Control Board. OSC Site Review 13439 Mandoli.docx 8/18/18 9 Source: US Army Corps of Engineers Safety Policy 3.1: Leave natural channels and flood plains in a natural state, unencumbered by development to the maximum extent feasible. Conservation Policy 5.1: Keep or restore major drainage courses in their natural condition insofar as possible because of their importance in supplying major vegetation, land forms and wildlife habitat, and storm drainage. Conservation Policy 1.3: Preserve the integrity of riparian corridors as unique and environmentally sensitive resources. Conservation Policy 3.1: Maintain and protect creeks and riparian corridors for wildlife that use this resource for food, shelter, migration and breeding. Conservation Policy 11.5: Ensure that development projects are designed to conserve the natural slope, preserve existing native vegetation, limit invasive species, and conserve natural drainage channels and swales. Municipal Code 10-2.702 Siting. (e) Creek Protection. Structures shall be set back a minimum of twenty-five (25) feet from the top of bank of all creeks. Greater setbacks may be required along major creeks in the Town; however, lesser setbacks may be allowed where approved by the Planning Commission. Improvements required to all creeks shall be accomplished to appear natural and to maintain the natural meandering course of the existing creek. Creeks and banks shall be protected so as to remain in their natural state as much as possible. They should not be disturbed by the building or grading process. No grading shall be allowed in creeks or within the required setbacks from top of bank. Siting of structures shall be done with safety as a primary concern. Safety concerns and preservation of riparian habitat are required to be simultaneously addressed when designing development and required improvements to creeks. (§ 15, Ord. 299, eff. December 11, 1985; §§ 6, 7, Ord. 370, eff. May 20, 1994; § 1, Ord. 504, eff. October 28, 2006) TREES, NATIVE VEGETATION & INVASIVE PLANTS Heritage oaks? Yes, several Significant trees? Groves of significant trees? Several oak trees and non-native species Trees proposed for removal (number and species)? Only non-native trees marked for removal: olive, pepper, fruit. OSC Site Review 13439 Mandoli.docx 8/18/18 10 Significant native vegetation? Yes, native toyon, oaks (live & valley) and other chaparral and woodland species. Significant invasive pest plant vegetation? Acacia, tamarisk, Scotch broom, Italian thistle Note major infestation of invasive weeds such as stinkwort, oxalis, Italian thistle, purple starthistle, yellow starthistle, pampas grass, broom, teasel, giant reed (Arundo donax), poison hemlock, etc. Conservation Policy 2.2: Minimize disturbance of the natural terrain and vegetation. Preserve and protect native and naturalized plants, with special attention to preservation of unique, rare or endangered species and plant communities such as oak woodlands. Conservation Policy 2.3: Preserve and protect Heritage Trees, including native oaks and other significant trees, on public and private property. Conservation Policy 11.5: Ensure that development projects are designed to conserve the natural slope, preserve existing native vegetation, limit invasive species, and conserve natural drainage channels and swales. Conservation Program 2.5 Encourage the dedication of conservation/open space easements or the public acquisition of areas that are rich in wildlife or of a fragile ecological nature to ensure their protection Open Space Policy 1.2: Protect and maintain those areas necessary to the integrity of natural resources and processes, with special emphasis on, but not limited to, the groundwater recharge and drainage system, open spaces vital for wildlife habitat, open spaces suitable for agriculture, and other areas of major or unique ecological significance. Land Use Program 2.3 Encourage the preservation of existing trees, rock outcroppings, ridgelines and other significant natural features Municipal Code 10-2.702 Siting. (f) Tree Preservation. Every feasible attempt should be made to preserve existing trees except those trees identified in the Los Altos Hills Landscape Guidelines invasive plant CA FOOD AND AGRICULTURAL CODE - FAC DIVISION 4. PLANT QUARANTINE AND PEST CONTROL [5001 - 8808] 5401. Any premises, plants, conveyances or things which are infected or infested with any pest, or premises where any pest is found, are a public nuisance, and shall be prosecuted as such in all actions and proceedings. All remedies which are given by law for the prevention and abatement of a nuisance apply to such a public nuisance. WILDLIFE CORRIDORS & FENCING Check 2006 Live Oak Associates map (not official) Evidence of wildlife (e.g., deer trails, spoor)? Yes; scat, bones, fur, animal trails Identify location and type of existing fencing: No fencing on this property except around the pool/patio area. Check that fencing on plans agrees with fencing on the ground Note any fence that does not meet current fencing regulations OSC Site Review 13439 Mandoli.docx 8/18/18 11 Conservation Policy 2.7: Avoid the development of environmentally sensitive areas that are rich in wildlife or of a fragile ecological nature, such as areas of rare or endangered species of plants, or riparian areas. Conservation Goal 3: Maintain and enhance the integrity of wildlife habitat. Conservation Program 3.3: Assess the potential for development patterns to fragment and isolate significant wildlife habitats. Conservation Section 315: Planning for natural movement of wildlife can help avoid, minimize and compensate for serious negative impacts on wildlife and humans. Areas that link wildlife habitat have become vital because native animals such as deer, fox, bobcat, and coyote are prevented by roads, fences, homes and other development from moving freely as they once did. Municipal Code 10-1.507 (d) Prohibited Fences, Walls, Gates, and Column Types. The following fences are prohibited: (1) Chain-link or cyclone fences, including any fence with bare lengths of wire stretched between metal poles, with the exception of dark green, black, or brown vinyl- coated chain-linked fences with matching vinyl-coated cross bars and caps. (2) Barbed or razor wire fences, including any fence with attached barbs, sharp points, or razors. Electric fences, including any fence designed to produce an electric shock, except where necessary for animal husbandry operations. (3) Any fence, wall, and/or gate that may cause harm to people, pets, and/or wildlife due to points, spikes, or sharpened edges on the top or bottom part of the fence, wall structure and/or gate. (9) Open Space/Conservation Easement Perimeter Fences. (i) Maximum height of open space/conservation easement perimeter fences: six (6) ft. (ii) Minimum distance of lowest fence strand or rail from ground: twelve (12) inches above grade. (iii) Open space/conservation easement perimeter fences shall provide openings sufficient to accommodate the free passage of wildlife through the easement. A split- rail wood fence (see exhibit) or equivalent design shall be required. Where a pathway is located within an open space/conservation easement, the perimeter fence shall be required to have at least two (2) openings at least as wide as the width of the pathway easement. (10) Any fence crossing or intersecting an officially designated wildlife corridor shall conform to the requirements specified above for an open space/conservation easement perimeter fence. OSC Site Review 13439 Mandoli.docx 8/18/18 12 OPEN SPACE EASEMENTS (OSE)/CONSERVATION EASEMENTS (CE) Check Town records for existing CE or OSE on this property and adjacent and nearby parcels. Identify areas where OSE are recommended (slope ≥30%, significant trees, wildlife corridor, creeks, drainage swales) No OSE found on neighboring properties. Open Space Policy 1.1 Provide, during the development process, for the maximum feasible preservation of open space in and adjoining the Town, with spaces ranging in size from regional scale to small-scale open space on individual lots. Open Space Policy 1.4: Preserve the natural beauty and minimize disturbance of the natural terrain and vegetation. Open Space Policy 1.7: To the extent possible, link open spaces together visually and physically to form a system of open spaces. Open Space Policy 1.8: Ensure that land uses and structures are compatible with the general open space quality of the planning area. Open Space Policy 2.6 New residential subdivisions shall provide open space for recreation in order to meet their appropriate share of local recreation needs. PATHWAY EASEMENTS (PE) Check Town records for existing or newly proposed PE on this property or adjacent and nearby parcels. Attachments: - Photos from site - Easement history and research - Photo of site plan with marked OSE FOLLOW-UP Send final copy to OSC Chair & Secretary Upload to TraKit ? Add address to list of easements to track on OSC agenda OSC Site Review 10275 Kenbar.docx 8/18/18 1 To: Los Altos Hills Planning Department From: Open Space Committee Date: June 14, 2018 Property address: 10275 Kenbar Road Date of Site Visit: June 11, 2018 Lands of Luu APN 331-17-020 Town Planner Suzanne Avila Project Number SD18-0020 Reason for review (check one) ü New Residence Second Unit Addition/Major Remodel Fence Permit OSC RECOMMENDATION FOR THIS PROPERTY Date of OSC review: June 14, 2018 Voting of review: Unanimously in favor (RC, WW, NC, SW, JS, RC, PB, KG) Absent (GC) Final OSC recommendation: The property is a steep (~30%) 1.477 acre lot. The existing house is situated on a flat portion downhill from mature oak trees and above steep slope that abuts with Rancho San Antonio. The proposed new house has three levels with an excavated basement. Total cut volume of ~1645 CY. There is a very old oak tree with DBH of over 6 feet downhill from proposed garage. The house location and pathways impinge on the roots and canopy of heritage oak trees. New landscaping is with native plants. Swale at rear of property drains to West Branch of Permanente Creek. Recommendations: 1. OSE at elevations below and to the west of the house over slopes >30% with mature oak trees. 2. Concern that the house and excavated areas are impinging on roots and canopy of mature oaks, especially oaks labeled #3 & #4 on attached diagram, and will kill the trees. 3. Old barb wire fencing on site and at southern border. Recommend removing barbwire fence to meet current code. 4. Remove large stand of reed (Arundo donax spp or Phalaris arundinacea spp) near and across western border. This plant is highly flammable, consumes high amounts of water, and is invasive. This plant typically grows in wet arears – it may be tapping into a water source. OSC Site Review 10275 Kenbar.docx 8/18/18 2 Recommended open space easement shown in green. Recommended open space easement shown in green. OSC Site Review 10275 Kenbar.docx 8/18/18 3 Blue line is tributary of West Branch of Permanente Creek OSC Site Review 10275 Kenbar.docx 8/18/18 4 OSC Site Review 10275 Kenbar.docx 8/18/18 5 OSC Site Review 10275 Kenbar.docx 8/18/18 6 Invasive reed plant should be removed. OSC Site Review 10275 Kenbar.docx 8/18/18 7 Above: barbed wire fence; Below: shallow drainage path at southern boundary OSC Site Review 10275 Kenbar.docx 8/18/18 8 Above the house Below the house SUPPORTING INFORMATION SLOPE AND SOIL Average slope of lot ____~30%____ Areas with slope ≥30%? Yes Check slope/LUF worksheet on subdivisions Review Geologic Hazard Report, if applicable. Check for colluvial soil, earthquake faults, springs, seeps, shallow groundwater. Safety Policy 1.1 Open space easements, zoning and other land use regulations shall be used to limit and, in some cases, prohibit development in areas of unstable terrain, active fault traces, water channels, flood plains, excessively steep slopes and other areas determined to be hazardous to public welfare and safety. Safety Policy 2.2 Locate development so as to avoid geologic hazards, including slope instability, to the maximum extent feasible. Land Use Policy 2.5 Steep slopes, canyons and ravines generally in excess of 30% slope, as well as natural swales and drainage channels, and geologic hazard areas within areas designated for residential development shall be left undisturbed and preserved in their natural condition to the maximum extent feasible. Land Use Policy 2.6 Limits on the development of individual residential lots shall be determined based on evaluation of such factors as natural vegetation, topographic characteristics, soils and geology. CREEKS Creeks or waterways or swale on parcel? Name of creek/tributary of: West Branch of Permanente Creek Shown on USGS map? SCVWD creek map? LAH Hazard Map? EcoAtlas? YES Condition of banks? No banks but swales drain toward this watershed. Existing riparian or OSE or SCVWD easement along creek on this property or nearby parcels? None. Does SCVWD want to expand their easement? Proposed setbacks for structures? Evidence of bed, banks, or Original High Water Mark (OHWM)? Identify any structures including fences within 25 feet of top of bank? Within OHWM? Area within the OHWM are regulated as Waters of the United States and protected by the Clean Water Act. Any development, vegetation removal, or stream bank modifications within this area may require permits from regulatory agencies: US Army Corps of Engineers, CA Dept of Fish and Wildlife, Regional Water Quality Control Board. OSC Site Review 10275 Kenbar.docx 8/18/18 9 Source: US Army Corps of Engineers Safety Policy 3.1: Leave natural channels and flood plains in a natural state, unencumbered by development to the maximum extent feasible. Conservation Policy 5.1: Keep or restore major drainage courses in their natural condition insofar as possible because of their importance in supplying major vegetation, land forms and wildlife habitat, and storm drainage. Conservation Policy 1.3: Preserve the integrity of riparian corridors as unique and environmentally sensitive resources. Conservation Policy 3.1: Maintain and protect creeks and riparian corridors for wildlife that use this resource for food, shelter, migration and breeding. Conservation Policy 11.5: Ensure that development projects are designed to conserve the natural slope, preserve existing native vegetation, limit invasive species, and conserve natural drainage channels and swales. Municipal Code 10-2.702 Siting. (e) Creek Protection. Structures shall be set back a minimum of twenty-five (25) feet from the top of bank of all creeks. Greater setbacks may be required along major creeks in the Town; however, lesser setbacks may be allowed where approved by the Planning Commission. Improvements required to all creeks shall be accomplished to appear natural and to maintain the natural meandering course of the existing creek. Creeks and banks shall be protected so as to remain in their natural state as much as possible. They should not be disturbed by the building or grading process. No grading shall be allowed in creeks or within the required setbacks from top of bank. Siting of structures shall be done with safety as a primary concern. Safety concerns and preservation of riparian habitat are required to be simultaneously addressed when designing development and required improvements to creeks. (§ 15, Ord. 299, eff. December 11, 1985; §§ 6, 7, Ord. 370, eff. May 20, 1994; § 1, Ord. 504, eff. October 28, 2006) TREES, NATIVE VEGETATION & INVASIVE PLANTS Heritage oaks? Yes, several Significant trees? Groves of significant trees? Several oak trees and non-native species Trees proposed for removal (number and species)? Not noted OSC Site Review 10275 Kenbar.docx 8/18/18 10 Significant native vegetation? Yes, native toyon and other chaparral and woodland species. Significant invasive pest plant vegetation? Some type of reed plant should be removed. Note major infestation of invasive weeds such as stinkwort, oxalis, Italian thistle, purple starthistle, yellow starthistle, pampas grass, broom, teasel, giant reed (Arundo donax), poison hemlock, etc. Conservation Policy 2.2: Minimize disturbance of the natural terrain and vegetation. Preserve and protect native and naturalized plants, with special attention to preservation of unique, rare or endangered species and plant communities such as oak woodlands. Conservation Policy 2.3: Preserve and protect Heritage Trees, including native oaks and other significant trees, on public and private property. Conservation Policy 11.5: Ensure that development projects are designed to conserve the natural slope, preserve existing native vegetation, limit invasive species, and conserve natural drainage channels and swales. Conservation Program 2.5 Encourage the dedication of conservation/open space easements or the public acquisition of areas that are rich in wildlife or of a fragile ecological nature to ensure their protection Open Space Policy 1.2: Protect and maintain those areas necessary to the integrity of natural resources and processes, with special emphasis on, but not limited to, the groundwater recharge and drainage system, open spaces vital for wildlife habitat, open spaces suitable for agriculture, and other areas of major or unique ecological significance. Land Use Program 2.3 Encourage the preservation of existing trees, rock outcroppings, ridgelines and other significant natural features Municipal Code 10-2.702 Siting. (f) Tree Preservation. Every feasible attempt should be made to preserve existing trees except those trees identified in the Los Altos Hills Landscape Guidelines invasive plant CA FOOD AND AGRICULTURAL CODE - FAC DIVISION 4. PLANT QUARANTINE AND PEST CONTROL [5001 - 8808] 5401. Any premises, plants, conveyances or things which are infected or infested with any pest, or premises where any pest is found, are a public nuisance, and shall be prosecuted as such in all actions and proceedings. All remedies which are given by law for the prevention and abatement of a nuisance apply to such a public nuisance. WILDLIFE CORRIDORS & FENCING Check 2006 Live Oak Associates map (not official) Evidence of wildlife (e.g., deer trails, spoor)? Yes. Identify location and type of existing fencing: No fencing on this property but there is a fence at the eastern neighboring property and old barb wire fencing at southern border. Check that fencing on plans agrees with fencing on the ground OSC Site Review 10275 Kenbar.docx 8/18/18 11 Note any fence that does not meet current fencing regulations Conservation Policy 2.7: Avoid the development of environmentally sensitive areas that are rich in wildlife or of a fragile ecological nature, such as areas of rare or endangered species of plants, or riparian areas. Conservation Goal 3: Maintain and enhance the integrity of wildlife habitat. Conservation Program 3.3: Assess the potential for development patterns to fragment and isolate significant wildlife habitats. Conservation Section 315: Planning for natural movement of wildlife can help avoid, minimize and compensate for serious negative impacts on wildlife and humans. Areas that link wildlife habitat have become vital because native animals such as deer, fox, bobcat, and coyote are prevented by roads, fences, homes and other development from moving freely as they once did. Municipal Code 10-1.507 (d) Prohibited Fences, Walls, Gates, and Column Types. The following fences are prohibited: (1) Chain-link or cyclone fences, including any fence with bare lengths of wire stretched between metal poles, with the exception of dark green, black, or brown vinyl- coated chain-linked fences with matching vinyl-coated cross bars and caps. (2) Barbed or razor wire fences, including any fence with attached barbs, sharp points, or razors. Electric fences, including any fence designed to produce an electric shock, except where necessary for animal husbandry operations. (3) Any fence, wall, and/or gate that may cause harm to people, pets, and/or wildlife due to points, spikes, or sharpened edges on the top or bottom part of the fence, wall structure and/or gate. (9) Open Space/Conservation Easement Perimeter Fences. (i) Maximum height of open space/conservation easement perimeter fences: six (6) ft. (ii) Minimum distance of lowest fence strand or rail from ground: twelve (12) inches above grade. (iii) Open space/conservation easement perimeter fences shall provide openings sufficient to accommodate the free passage of wildlife through the easement. A split- rail wood fence (see exhibit) or equivalent design shall be required. Where a pathway is located within an open space/conservation easement, the perimeter fence shall be required to have at least two (2) openings at least as wide as the width of the pathway easement. OSC Site Review 10275 Kenbar.docx 8/18/18 12 (10) Any fence crossing or intersecting an officially designated wildlife corridor shall conform to the requirements specified above for an open space/conservation easement perimeter fence. OPEN SPACE EASEMENTS (OSE)/CONSERVATION EASEMENTS (CE) Check Town records for existing CE or OSE on this property and adjacent and nearby parcels. Identify areas where OSE are recommended (slope ≥30%, significant trees, wildlife corridor, creeks, drainage swales) No OSE found on neighboring properties. Open Space Policy 1.1 Provide, during the development process, for the maximum feasible preservation of open space in and adjoining the Town, with spaces ranging in size from regional scale to small-scale open space on individual lots. Open Space Policy 1.4: Preserve the natural beauty and minimize disturbance of the natural terrain and vegetation. Open Space Policy 1.7: To the extent possible, link open spaces together visually and physically to form a system of open spaces. Open Space Policy 1.8: Ensure that land uses and structures are compatible with the general open space quality of the planning area. Open Space Policy 2.6 New residential subdivisions shall provide open space for recreation in order to meet their appropriate share of local recreation needs. PATHWAY EASEMENTS (PE) Check Town records for existing or newly proposed PE on this property or adjacent and nearby parcels. Attachments: - Photos from site - Easement history and research - Photo of site plan with marked OSE FOLLOW-UP Send final copy to OSC Chair & Secretary Upload to TraKit ? Add address to list of easements to track on OSC agenda OSC Site Review 26896 Alejandro.docx 8/18/18 1 To: Los Altos Hills Planning Department From: Open Space Committee Date: June 14, 2018 Property address: 26896 Alejandro Drive Date of Site Visit: June 11, 2018 Lands of Lam & Stepanov APN 175-44-065 Town Planner Steve Padovan Project Number SD18-0015 Reason for review (check one) New Residence Second Unit ü Addition/Major Remodel Fence Permit OSC RECOMMENDATION FOR THIS PROPERTY Date of OSC review: June 14, 2018 Voting of review: Unanimously in favor (RC, WW, NC, SW, JS, RC, PB, KG) Absent (GC) Final OSC recommendation: The property is a steep (~>30%) 1.2 acre lot. The existing house is situated on a flat portion ~ 50 feet below Cresta Drive and above a ~30% slope with mature oaks. The proposed remodel is in the same footprint as existing. No trees are marked for removal. The species of trees are not marked on the plans but most are oaks. There is a large storm drain basin at the foot (southeast end) of the driveway and EcoAtlas shows a drainage swale near the southern boundary, draining into Barron Creek watershed. The committee questions why the neighboring property, 26890 Alejandro, was not reviewed by the Open Space Committee. Property has steep slopes, oak woodland and drainage swale. Contiguous open space easements are a state goal in the General Plan. Recommendations: 1. OSE at elevations above, below and to the north of the house over slopes >30% with mature oak trees. 2. Take measures to protect mature valley oak roots and canopy at driveway. OSC Site Review 26896 Alejandro.docx 8/18/18 2 Blue line is Barron Creek tributary OSC Site Review 26896 Alejandro.docx 8/18/18 3 Recommended OSE shown in red. OSC Site Review 26896 Alejandro.docx 8/18/18 4 Storm drain at base of swale and additional drainage from neighboring property. Debris should be removed from drainage. OSC Site Review 26896 Alejandro.docx 8/18/18 5 OSC Site Review 26896 Alejandro.docx 8/18/18 6 Above the house Below the house OSC Site Review 26896 Alejandro.docx 8/18/18 7 SUPPORTING INFORMATION SLOPE AND SOIL Average slope of lot ____>30%____ Areas with slope ≥30%? Yes Check slope/LUF worksheet on subdivisions Review Geologic Hazard Report, if applicable. Check for colluvial soil, earthquake faults, springs, seeps, shallow groundwater. Safety Policy 1.1 Open space easements, zoning and other land use regulations shall be used to limit and, in some cases, prohibit development in areas of unstable terrain, active fault traces, water channels, flood plains, excessively steep slopes and other areas determined to be hazardous to public welfare and safety. Safety Policy 2.2 Locate development so as to avoid geologic hazards, including slope instability, to the maximum extent feasible. Land Use Policy 2.5 Steep slopes, canyons and ravines generally in excess of 30% slope, as well as natural swales and drainage channels, and geologic hazard areas within areas designated for residential development shall be left undisturbed and preserved in their natural condition to the maximum extent feasible. Land Use Policy 2.6 Limits on the development of individual residential lots shall be determined based on evaluation of such factors as natural vegetation, topographic characteristics, soils and geology. CREEKS Creeks or waterways or swale on parcel? Name of creek/tributary of: Barron Creek Shown on USGS map? SCVWD creek map? LAH Hazard Map? EcoAtlas? YES Condition of banks? No banks but swales drain toward this watershed. Large catchbasin near driveway. Existing riparian or OSE or SCVWD easement along creek on this property or nearby parcels? None. Does SCVWD want to expand their easement? Proposed setbacks for structures? Evidence of bed, banks, or Original High Water Mark (OHWM)? Identify any structures including fences within 25 feet of top of bank? Within OHWM? Area within the OHWM are regulated as Waters of the United States and protected by the Clean Water Act. Any development, vegetation removal, or stream bank modifications within this area may require permits from regulatory agencies: US Army Corps of Engineers, CA Dept of Fish and Wildlife, Regional Water Quality Control Board. OSC Site Review 26896 Alejandro.docx 8/18/18 8 Source: US Army Corps of Engineers Safety Policy 3.1: Leave natural channels and flood plains in a natural state, unencumbered by development to the maximum extent feasible. Conservation Policy 5.1: Keep or restore major drainage courses in their natural condition insofar as possible because of their importance in supplying major vegetation, land forms and wildlife habitat, and storm drainage. Conservation Policy 1.3: Preserve the integrity of riparian corridors as unique and environmentally sensitive resources. Conservation Policy 3.1: Maintain and protect creeks and riparian corridors for wildlife that use this resource for food, shelter, migration and breeding. Conservation Policy 11.5: Ensure that development projects are designed to conserve the natural slope, preserve existing native vegetation, limit invasive species, and conserve natural drainage channels and swales. Municipal Code 10-2.702 Siting. (e) Creek Protection. Structures shall be set back a minimum of twenty-five (25) feet from the top of bank of all creeks. Greater setbacks may be required along major creeks in the Town; however, lesser setbacks may be allowed where approved by the Planning Commission. Improvements required to all creeks shall be accomplished to appear natural and to maintain the natural meandering course of the existing creek. Creeks and banks shall be protected so as to remain in their natural state as much as possible. They should not be disturbed by the building or grading process. No grading shall be allowed in creeks or within the required setbacks from top of bank. Siting of structures shall be done with safety as a primary concern. Safety concerns and preservation of riparian habitat are required to be simultaneously addressed when designing development and required improvements to creeks. (§ 15, Ord. 299, eff. December 11, 1985; §§ 6, 7, Ord. 370, eff. May 20, 1994; § 1, Ord. 504, eff. October 28, 2006) TREES, NATIVE VEGETATION & INVASIVE PLANTS Heritage oaks? Yes, several Significant trees? Groves of significant trees? Several oak trees and non-native species Trees proposed for removal (number and species)? Not noted Significant native vegetation? Yes, native valley and live oaks. OSC Site Review 26896 Alejandro.docx 8/18/18 9 Significant invasive pest plant vegetation? Note major infestation of invasive weeds such as stinkwort, oxalis, Italian thistle, purple starthistle, yellow starthistle, pampas grass, broom, teasel, giant reed (Arundo donax), poison hemlock, etc. Conservation Policy 2.2: Minimize disturbance of the natural terrain and vegetation. Preserve and protect native and naturalized plants, with special attention to preservation of unique, rare or endangered species and plant communities such as oak woodlands. Conservation Policy 2.3: Preserve and protect Heritage Trees, including native oaks and other significant trees, on public and private property. Conservation Policy 11.5: Ensure that development projects are designed to conserve the natural slope, preserve existing native vegetation, limit invasive species, and conserve natural drainage channels and swales. Conservation Program 2.5 Encourage the dedication of conservation/open space easements or the public acquisition of areas that are rich in wildlife or of a fragile ecological nature to ensure their protection Open Space Policy 1.2: Protect and maintain those areas necessary to the integrity of natural resources and processes, with special emphasis on, but not limited to, the groundwater recharge and drainage system, open spaces vital for wildlife habitat, open spaces suitable for agriculture, and other areas of major or unique ecological significance. Land Use Program 2.3 Encourage the preservation of existing trees, rock outcroppings, ridgelines and other significant natural features Municipal Code 10-2.702 Siting. (f) Tree Preservation. Every feasible attempt should be made to preserve existing trees except those trees identified in the Los Altos Hills Landscape Guidelines invasive plant CA FOOD AND AGRICULTURAL CODE - FAC DIVISION 4. PLANT QUARANTINE AND PEST CONTROL [5001 - 8808] 5401. Any premises, plants, conveyances or things which are infected or infested with any pest, or premises where any pest is found, are a public nuisance, and shall be prosecuted as such in all actions and proceedings. All remedies which are given by law for the prevention and abatement of a nuisance apply to such a public nuisance. WILDLIFE CORRIDORS & FENCING Check 2006 Live Oak Associates map (not official) Evidence of wildlife (e.g., deer trails, spoor)? Yes. Identify location and type of existing fencing: No fencing on this property but there is a fence at the northern neighboring property. Check that fencing on plans agrees with fencing on the ground Note any fence that does not meet current fencing regulations OSC Site Review 26896 Alejandro.docx 8/18/18 10 Conservation Policy 2.7: Avoid the development of environmentally sensitive areas that are rich in wildlife or of a fragile ecological nature, such as areas of rare or endangered species of plants, or riparian areas. Conservation Goal 3: Maintain and enhance the integrity of wildlife habitat. Conservation Program 3.3: Assess the potential for development patterns to fragment and isolate significant wildlife habitats. Conservation Section 315: Planning for natural movement of wildlife can help avoid, minimize and compensate for serious negative impacts on wildlife and humans. Areas that link wildlife habitat have become vital because native animals such as deer, fox, bobcat, and coyote are prevented by roads, fences, homes and other development from moving freely as they once did. Municipal Code 10-1.507 (d) Prohibited Fences, Walls, Gates, and Column Types. The following fences are prohibited: (1) Chain-link or cyclone fences, including any fence with bare lengths of wire stretched between metal poles, with the exception of dark green, black, or brown vinyl- coated chain-linked fences with matching vinyl-coated cross bars and caps. (2) Barbed or razor wire fences, including any fence with attached barbs, sharp points, or razors. Electric fences, including any fence designed to produce an electric shock, except where necessary for animal husbandry operations. (3) Any fence, wall, and/or gate that may cause harm to people, pets, and/or wildlife due to points, spikes, or sharpened edges on the top or bottom part of the fence, wall structure and/or gate. (9) Open Space/Conservation Easement Perimeter Fences. (i) Maximum height of open space/conservation easement perimeter fences: six (6) ft. (ii) Minimum distance of lowest fence strand or rail from ground: twelve (12) inches above grade. (iii) Open space/conservation easement perimeter fences shall provide openings sufficient to accommodate the free passage of wildlife through the easement. A split- rail wood fence (see exhibit) or equivalent design shall be required. Where a pathway is located within an open space/conservation easement, the perimeter fence shall be required to have at least two (2) openings at least as wide as the width of the pathway easement. (10) Any fence crossing or intersecting an officially designated wildlife corridor shall conform to the requirements specified above for an open space/conservation easement perimeter fence. OSC Site Review 26896 Alejandro.docx 8/18/18 11 OPEN SPACE EASEMENTS (OSE)/CONSERVATION EASEMENTS (CE) Check Town records for existing CE or OSE on this property and adjacent and nearby parcels. Identify areas where OSE are recommended (slope ≥30%, significant trees, wildlife corridor, creeks, drainage swales) No OSE found on neighboring properties. Open Space Policy 1.1 Provide, during the development process, for the maximum feasible preservation of open space in and adjoining the Town, with spaces ranging in size from regional scale to small-scale open space on individual lots. Open Space Policy 1.4: Preserve the natural beauty and minimize disturbance of the natural terrain and vegetation. Open Space Policy 1.7: To the extent possible, link open spaces together visually and physically to form a system of open spaces. Open Space Policy 1.8: Ensure that land uses and structures are compatible with the general open space quality of the planning area. Open Space Policy 2.6 New residential subdivisions shall provide open space for recreation in order to meet their appropriate share of local recreation needs. PATHWAY EASEMENTS (PE) Check Town records for existing or newly proposed PE on this property or adjacent and nearby parcels. Attachments: - Photos from site - Easement history and research - Photo of site plan with marked OSE FOLLOW-UP Send final copy to OSC Chair & Secretary Upload to TraKit ? Add address to list of easements to track on OSC agenda