HomeMy WebLinkAboutCT 2018-0006; LAGUNA DRIVE SUBDIVISION; DRAFT CONCEPTUAL WETLAND BUFFER RESTORATION PLAN; 2018-10-01·,
• •
DRAFT
CONCEPTUAL WETLAND BUFFER RESTORATION
PLAN
for
570/580 LAGUNA DRIVE
CITY OF CARLSBAD, CALIFORNIA
Prepared for:
Brett Farrow
125 Mozart Avenue
Cardiff, California 92007
Prepared by:
DUDEK
605 Third Street
Encinitas, California 92024
Tel. 760.942.5147
Contact:
Callie Amoaku, Project Biologist
or
Paul Walsh, Landscape Architect No. 4446/
Habitat Restoration Specialist
OCTOBER 2018
' .
Section
Draft Conceptual Wetland Buffer Restoration Plan for
570/580 Laguna Drive
City of Carlsbad, California
TABLE OF CONTENTS
Page No.
1 INTRODUCTION .............................................................................................................. 1
2 PROJECT IMPACTS AND MITIGATION ................................................................... 3
3 RESTORATION PURPOSE AND GOALS .................................................................... 9
4 RESPONSIBLE PARTIES ............................................................................................. 11
5 IMPLEMENTATION PLAN ......................................................................................... 13
5.1 Site Preparation and Initial Weed Control ............................................................ 13
5.2 Hydroseed Application ......................................................................................... 13
5.3 Erosion Control ..................................................................................................... 15
5 .4 Preliminary Schedule ............................................................................................ 15
5.5 Time Lapse ............................................................................................................ 16
5.6 Cost Estimate and Financing ................................................................................ 16
5.7 Final Restoration Landscape Plans (Construction Documents) ............................ 16
6 5-YEAR MAINTENANCE PLAN ................................................................................. 17
6.1 Irrigation ............................................................................................................... 1 7
6.2 Weed and Pest Control. ......................................................................................... 1 7
6.3 Soil Fertility Management .................................................................................... 18
6.4 Trash Removal ...................................................................................................... 18
6.5 Access Control ...................................................................................................... 18
7 MONITORING PROGRAM .......................................................................................... 19
7 .1 Qualitative Monitoring .......................................................................................... 19
7 .2 Quantitative Monitoring ........................................................................................ 19
7.3 Reporting ............................................................................................................... 19
8 FINAL PERFORMANCE STANDARDS ..................................................................... 21
8.1 Rationale for Expecting Success ........................................................................... 21
8.2 Target Functions ................................................................................................... 21
8.3 Performance Standards ......................................................................................... 21
8.3.1 Success Criteria for Wetland Buffer Area ................................................ 22
8.3.2 Success Criteria for Wetland Buffer within FMZ/B3 Area ...................... 23
9 COMPLETION OF 5-YEAR PROGRAM ................................................................... 25
9 .1 Notification of Completion ................................................................................... 25
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TABLE OF CONTENTS (CONTINUED)
Section Page No.
9 .2 Contingency Measures .......................................................................................... 25
9.3 Long-Term Management ...................................................................................... 25
10 REFEREN CES ................................................................................................................. 27
FIGURES
1 Project Location Map ........................................................................................................... 5
2 100-Foot Wide Wetland Buffer Restoration Map ............................................................... 7
TABLES
1 Native Wetland Buffer Seed Mix (0.16 acres) .................................................................. 14
2 Native Wetland Buffer Seed Mix-Modified FMZ B-3 Area (011. acres) ...................... 14
3 Mitigation Schedule .......................................................................................................... 15
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1 INTRODUCTION
The project site is located within the coastal zone; the northwest comer of the project site is within
Core Area 1 according to the City of Carlsbad's (City) Habitat Management Plan (HMP), but it
does not fall within a hardline area (Buena Vista Lagoon) (City of Carlsbad 2004). Dudek
conducted a biological study of the property on November 2, 2017, and February 2, 2018; the
methods, details, and results of the investigations are provided in a separate letter report dated
October 4, 2018.
The property (i.e., site) occupies 0.75 acres and is located along the north side of Laguna Drive
approximately 0.5 miles west of Interstate 5 and 0.4 miles east of the Pacific Ocean (see Figure 1 ).
The site is located in Section 01 in Township 12 South, Range 5 West in the U.S. Geological
Service 7 .5-minute series topographic San Luis Rey quadrangle map. The site is bordered by the
Buena Vista Lagoon to the north/northwest, by Laguna Drive to the south, and development to
the east and west (see Figures 1 and 2).
The proposed project includes the demolition of an existing office building and single-family dwelling,
and construction of 13 new detached three-story, single family homes (average of 1,644 square feet
each) with roof decks on an approximately 0.75-acre site. The lot will be subdivided into 13 individual
air space site condominiums. All lots will have individual water, gas, electricity, telecom, and sewer
services that are brought into the site via the driveway, which will serve as a shared access and mutual
maintenance/utility easement. There are no common areas proposed as part of the project. The project
emphasizes sustainability and walkability by recognizing its location as not being car dependent with
mass transit nearby. Garage spaces are provided and will include a lift to allow for a second private
vehicle.
The proposed project also includes an open space easement and a 25-foot public access easement
within the open space and a 100-feet wide wetland buffer (Figure 2). While not formally required
by the Fire Department, there is a fuel modification zone (FMZ) B-3 within a portion of the open
space and public access easement. While the project does not incur direct impacts to sensitive
vegetation within the wetland buffer area or other areas on the project site, the proposed project
would remove weeds and invasive species from the wetland buffer area and provide restoration
with native plants (Figure 2).
This document provides site-specific guidelines for habitat restoration of the wetlands buffer area
associated with the project.
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2 PROJECT IMPACTS AND MITIGATION
Direct impacts to the wetland buffer or native vegetation will not occur as a result of the
project. Neither special status plants nor wildlife were detected on the project site. Indirect
edge effects during construction will be mitigated using typical best management practices
(BMPs) for construction, including temporary construction fencing, dust control, erosion
control, and water quality protection measures.
Potential long-term indirect impacts include incursions/trampling by humans traveling off trail,
invasion by non-native plants and animals, exposure to urban pollutants (fertilizers, pesticides,
herbicides, pet waste, and other hazardous materials), increase or decrease in natural fire regime,
soil erosion, and hydrologic changes (e.g., surface and groundwater level and quality).
Potential indirect impacts will be mitigated to a level below significant through the on-site restoration
of the 100-foot wide buffer that is currently a combination of non-native habitat and barren ground,
with the exception of a narrow strip (0.01 acres) of coastal freshwater marsh along the northernmost
portion of the site. The wetland buffer will be managed in perpetuity by a qualified habitat
management entity. A non-wasting endowment will be provided for the purposes of the long-term
management of the buffer.
To avoid impacting breeding and nesting birds in accordance to the Migratory Bird Treaty Act, a
breeding/nesting bird survey shall be conducted prior to restoration activities if vegetation clearing
is slated to occur during the nesting season (February 15 to August 31). Nests that are detected
within proposed restoration areas will be avoided until nesting is completed.
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FIGURE 1
Project Location Map
Conceptual Wetland Buffer Restoration Plan for 570/580 Laguna Drive
Draft Conceptual Wetland Buffer Restoration Plan for
570/580 Laguna Drive
City of Carlsbad, California
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~ Project Site
Wetland Buffer Restoration Area
25-Foot Lateral Public Access Easement within
100-Foot Wide WeUand Buffer
[]) FMZ Modified B-3
ACOE/RWQCB/CDFW/CCC WeUand
---100-Foot Wide WeUand Buffer
SOURCE Brett Farrow 2018 SanGIS 2017 2018
DUDEI< !
D Vegetation Communities/Land Cover Types
DEV -Urban/Developed
DH -Disturbed Habitat
FWM -Coastal and Valley Freshwater Marsh
50 25 Feel
~
FIGURE 2
100-Foot Wide Wetland Buffer Restoration Map
Conceptual Wetland Buffer Restoration Plan for 570/580 Laguna Drive
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3 RESTORATION PURPOSE AND GOALS
The goal of the restoration program is to replace the non-native vegetation and invasive species
currently present within the 100-foot wide wetland buffer area with an assemblage of native plants
common to north facing coastal slopes of northern San Diego County. Diegan sage scrub with
occurrences of woody sclerophyllous species, including lemonadeberry (Rhus integrifolia), laurel
sumac (Malosma laurina), and toyon (Heteromeles arbutifolia), is common to the north-facing
slopes in the local area. Thus, establishing Diegan sage scrub sage buffer on the slopes is the goal.
The central purpose is to provide native habitat capable of buffering the potential negative effects
of the development and future open space trail. In addition, the native habitat will provide forage
and cover for a variety of native wildlife species and result in improved water quality. This plan
details how the currently non-native buffer slopes will be restored, maintained, and monitored.
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4 RESPONSIBLE PARTIES
The project proponent is Laguna Project, LP. The project proponent is responsible for the
implementation, maintenance, monitoring, and success of the wetland buffer restoration program.
The project biologist/restoration specialist refers to a qualified individual with at least 5 years of
experience performing restoration of upland habitat in the Southern California region. The project
restoration specialist shall be familiar with native plant and weed species and be trained in the area
of controlling weeds within wildland areas. The project restoration specialist shall have a BS
degree in restoration ecology, biology, botany, or a closely related field and will ensure the
restoration effort is installed in accordance with this plan, the environmental permits and
documents, and the final approved construction plans and specifications. The restoration specialist
will perform installation and monitoring and reporting duties as outlined herein. The restoration
specialist will be under contract with the project proponent.
The contractor refers to a person or entity that has a valid landscape contractor's license, Class C-
27, and at least 5 years of experience performing native habitat restoration services in the Southern
California region. The contractor shall be f arniliar with weeds and invasive species, and have in-
depth experience and training in controlling wildland weeds. The contractor shall have a Qualified
Pesticide Applicator's License or have a Pesticide Applicators' Certificate issued by the
Department of Pesticide Regulations. The contractor shall provide verification of experience and
provide copies of licenses upon request. The restoration contractor will provide installation and
maintenance services and be under contract with the project proponent/owner.
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5 IMPLEMENTATION PLAN
This section describes the strategy that will be utilized to achieve the restoration purpose and goals
outlined in Section 3. Buffer restoration will be achieved through a process that includes initially
cutting all weeds and invasive species to grade and treating tree stumps and other perennial
invasive species with the appropriate systemic herbicide to prevent re-sprouting. Following weed
and invasive species removal, the site will be cleared of all trash and debris and have temporary
BMPs installed. Following BMP installation, the site will be seeded with a native seed mix blended
with a seed mix slurry that will help provide erosion control until the seeds become established.
The seed mix will include native nurse crop species that will provide quick germination and assist
in erosion control until the perennial vegetation becomes established. Plants and seeds will
originate from local sources to the greatest extent feasible. Each component of the implementation
plan is included in detail below.
5.1 Site Preparation and Initial Weed Control
Site preparation includes cutting all weeds and invasive species to grade and removing all trash and
debris from the site using handheld tools. It should be noted that the removal of plant roots is not
recommended in order to help prevent erosion of the relatively steep slopes. Likewise,
old/dilapidated retaining walls are recommended to be left in place to prevent potential erosion
issues, unless removal is recommended beforehand by a qualified engineer. The two large Canary
Island (Phoenix canariensis) palm trees may either be cut to grade and carefully removed, or killed
in place with a systemic herbicide and left as snags. Soil testing is not necessary based on our review
of the site's soil condition and the vigor of the non-native plants currently growing on the site.
All weeds will be removed from the soil surface and disposed of at a local landfill or green waste
composting facility. The site shall be free of weeds, trash, debris, and have temporary BMPs
installed prior to beginning planting and seeding work.
5.2 Hydroseed Application
Once the site preparation work has been completed and approved the wetland buffer restoration
areas will be hydroseeded with the seed mixes shown in Tables 1 and 2. The seed mixes shall be
applied to the areas shown on Figure 2. The habitat restoration specialist shall monitor seeding
work and be provided the seed tags to verify the seed mix meets the seed requirements herein and
the project specifications. Seed tags shall be available to the City upon request.
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Table 1
Native Wetland Buffer Seed Mix (0.16 acres)
Percent
Sclentfflc Name Common Name Purity/Germination Pounds per Acre
Ambrosia psilostachya western ragweed 15/30 3
Artemisia ca/ifornica California sagebrush 15/50 4
Croton californicus California croton 90/20 3
Ence/ia californica coast sunflower 40/60 1
Eriogonum fascicu/atum California buckwheat 10/65 5
Eriophyllum confertiflorum* golden yarrow 30/60 2
Eschscho/zia ca/ifornica* California poppy 95/75 3
Heteromeles arbutifo/ia toyon 95/40 3
/socoma menziesii coastal goldenbush 20/40 1
Leymus condensatus giant wild rye 70/80 3
Lotus scoparius deerweed 90/60 2
Malosma laurina laurel sumac 95/60 2
Nassella lepida foothill needlegrass 60/60 2
Rhus integrifolia lemondadeberry 90/50 3
Salvia mellifera black sage 70/50 3
Sisyrinchium bellum blue-eyed grass 95/75 3
Total 43
Notes: *Indicates nurse crop species.
Hydroseed slurry shall contain the following : Seed mix at rates indicated above, bonded fiber matrix at 3,500 pounds/acre, and green dye.
Table 2
Native Wetland Buffer Seed Mix-Modified FMZ B-3 Area (011. acres)
Scientific Name Common Name
Ambrosia psilostachya western ragweed
Camissonia bistorta California suncup
Croton californicus California croton
Ence/ia californica coast sunflower
Eriophyllum confertif/orum* golden yarrow
Eschscholzia californica* California poppy
lsocoma menziesii coastal goldenbush
Leymus condensatus giant wild rye
Lotus scoparius deerweed
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14
Percent
Purity/Germination
15/30
90170
90/20
40/60
30/60
95/75
20/40
70/80
90/60
Pounds per Acre
4
3
4
1
3
3
1
2
2
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Table 2
Native Wetland Buffer Seed Mix-Modified FMZ B-3 Area (011. acres)
Percent
Scientific Name Common Name Purity/Germination Pounds per Acre
Nassel/a lepida foothill needlegrass 60/60 2
Sisyrinchium be/furn blue-eyed grass 95/75 3
Total 28
Notes: *Indicates nurse crop species.
Hydroseed slurry shall contain the following: Seed mix at rates indicated above, fiber mulch at 2,500 pounds/acre, and green dye.
5.3 Erosion Control
The hydroseed slurry that contains quick-germinating nurse crop species will provide erosion
control. Prior to seeding, burlap-encased fiber rolls certified free of noxious weeds will be installed
on the sloped areas at approximately 10 feet on-center. The final BMP locations and spacing will be
included on the construction drawings, and or project stormwater pollution prevention program
(SWPPP). The site will be reviewed for erosion problems by the habitat restoration specialist during
regular site visits to determine if any further erosion or sediment control measures are necessary.
5.4 Preliminary Schedule
An outline of the anticipated project installation sequence and schedule is provided in Table 3.
Weed control will occur prior to seed installation as part of site preparation work. Seed installation
shall be performed between October and January, in order to maximize seed germination and
establishment. The biological monitoring and maintenance period will commence upon successful
completion of seed installation and continue for 5 years, or until the performance standards
outlined herein are met.
Task Description
Seed ordering
Site preparation
Seeding
Maintenance and Monitoring Program
Table 3
Mitigation Schedule
Anticipated Work Period
2 to 9 months prior to anticipated installation
Late summer/fall of development year
Fall/early winter of development year
Upon successful installation for 5 years or until performance
standards are met
Note: Approximate schedule to be adjusted based upon final development timing.
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City of Carlsbad, California
5.5 Time Lapse
It is estimated that the initial site preparation and installation will take approximately 1 to 3 weeks.
Once installation is complete, the length of time to develop Diegan sage scrub habitat is largely
dependent on a variety of factors including weather, precipitation, drought, the life cycle of the
various plant species, herbivory, weed competition, and maintenance. To help ensure adequate
seed germination, seeding will be performed between October and late January. It is anticipated
that the herbaceous and semi-woody species in coastal sage scrub will provide significant
vegetative cover within 2 to 3 years. Within a 3 to 5-year period, there should be adequate cover
by native woody, sub-woody, and herbaceous vegetation such that the site is resistant to erosion
and invasion by weed species, is self-supporting (i .e., does not require watering), and provides a
relatively dense vegetative buffer.
5.6 Cost Estimate and Financing
Based on this conceptual plan, the cost for implementing the 0.27-acre on-site buffer restoration
program is estimated to be approximately $10,880. This includes the cost of site preparation and
hydroseeding. Up to 5 years of maintenance and monitoring is estimated to cost approximately
$15 ,000. The total cost for the buffer restoration is estimated at approximately $25 ,880. All costs
associated with the restoration effort will be the responsibility of the project owner or future owners.
5.7 Final Restoration Landscape Plans (Construction Documents)
A set of landscape restoration construction documents (i.e., plans and specifications) shall be
prepared by a qualified landscape architect/habitat restoration specialist to implement the design
intent of the buffer restoration areas. Plans and specifications shall be prepared using the approved
Final Conceptual Plan and the Guidelines for Riparian and Wetland Buffers (TAIC 2010). The
plans shall be submitted to the City for review and approval.
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6 5-YEAR MAINTENANCE PLAN
The 5-Year Maintenance Plan provides direction for routine maintenance of the 100-foot wide wetland
buffer restoration area to be conducted during the 5-year maintenance and monitoring period. The 5-
year maintenance period begins when the habitat restoration specialist indicates in writing that the
restoration installation has been completed in substantial conformance with the final conceptual plan
and final restoration landscape construction documents (i.e., plans and specifications).
A landscape maintenance contractor with experience in Southern California native upland habitat
restoration shall maintain the buff er restoration area until the performance standards outlined herein
are met and a letter of acceptance is provided by the City. If necessary, corrective measures such as
additional weeding or seeding may be implemented, if recommended by the habitat restoration
specialist, to bring the restoration areas into compliance with the annual performance standards.
The restored wetland buffer will become self-sustaining over time, needing little or no
maintenance once established. Maintenance activities will include weed control, trash removal,
and maintaining buffer area fencing and signage.
6.1 Irrigation
Irrigation is not recommended for the wetland buffer slopes due to the steepness of the slopes,
proximity to existing wetlands/waters of the United States loose soil characteristics, and potential
for run off and erosion.
6.2 Weed and Pest Control
In general, little or no pest control is anticipated for the restoration areas except for weed control.
The concepts of integrated pest management (1PM) will be used if pest control become necessary
(Dreistadt 2016). All weeds shall be controlled at least monthly for the first 6 months and at least
seasonally during the 5-year monitoring and maintenance period.
All weeds shall be controlled before they set seed and before they attain a height of more than 12
inches. Weed debris and slash shall be promptly removed from the site and disposed of in a legal
manner. Perennial species and those requiring root kill shall be cut to grade and carefully spot-
sprayed with the appropriate systemic herbicide. Annual weeds shall be carefully removed using
hand tools or carefully spot sprayed with herbicide. Herbicide use shall be pre-approved by the
habitat restoration specialist and include a purple dye.
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Vertebrate pest control is not anticipated as part of this project, nor are insect pests expected to be
severe enough to warrant control. If control does become necessary, IPM techniques will be
applied. Pest control shall be conducted following all applicable laws, regulations, label directions,
and safety precautions. Should the contractor require specific pest control recommendations, the
contractor shall consult a licensed pest control adviser. The contractor shall provide reports of all pest
control measures implemented at the site, including details of methods and materials used, including
any pesticide applications.
6.3 Soil Fertility Management
The addition of soil amendments and fertilizers is not anticipated. The habitat restoration specialist
may recommend applications of fertilizer if a deficiency becomes apparent.
6.4 Trash Removal
Trash shall be regularly removed from the restoration areas by the contractor during each site visit
and disposed of. Trash shall be removed as needed, but no less than quarterly.
6.5 Access Control
Fencing will be installed as shown on the final landscape plans to prevent persons using the future
open space trail from entering the wetland buff er area. A sign will be posted on the fence to inform
persons that the site is a natural conservation area and to discourage entry.
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7 MONITORING PROGRAM
The habitat restoration specialist shall monitor the wetland buffer restoration area and prepare
annual reports during the 5-year maintenance and monitoring period. Qualitative and quantitative
monitoring will be performed, and annual reports will be prepared and submitted to the City.
7 .1 Qualitative Monitoring
The habitat restoration specialist shall visit the restoration areas monthly during the first 4 months
following installation and quarterly (seasonally) for the remaining 5 years. Qualitative visual
surveys of the restoration areas shall consist of site inspections to assess native seed germination
and growth and review maintenance work. The maintenance contractor shall be present during the
qualitative surveys, if so requested by the habitat restoration specialist, to review maintenance
activities, address specific maintenance needs, and discuss whether remedial measures are needed
in order to meet the annual performance standards. General observations, such as plant health,
weed growth, pest problems, erosion, and trash accumulation will be noted. Maintenance needs
will be documented and submitted to the contractor and the project owner. If remedial measures
are recommended by the restoration specialist to meet the annual performance standards they will
be presented to the project owner for approval. Permanent photo viewpoints will be established to
visually track vegetation development during the monitoring period.
7.2 Quantitative Monitoring
Quantitative monitoring shall include visually estimating native and weed cover during years 1
through 3. A point intercept transect will be established diagonally through the buffer area and
utilized to collect cover data during years 4 and 5. Transect data will be recorded onto field forms
and include percent cover by species, percent bare ground, notes on surface condition (e.g., rock,
sand, vegetative detritus), and overall species richness within the buffer restoration area.
7.3 Reporting
Annual monitoring reports will be prepared by the habitat restoration specialist to document the
progress of the restoration effort, include tabulated transect data, compare collected site data results
to performance standards, provide representative photographs from permanent photo-points, and
make remedial recommendations, if necessary. Annual reports will be submitted to the Owner and
City on the project anniversary each year.
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8 FINAL PERFORMANCE STANDARDS
The goal of the buffer restoration program is to provide Diegan sage scrub that functions as an
effective buffer between the development and future open space trail and the wetlands located 100
feet to the north. In addition, the replacement of weeds and invasive species with native vegetation
will increase foraging and cover for native wildlife and help improve water quality. Performance
standards have been established to define when the restoration effort is deemed to be successful
and are outlined in Section 8.3.
8.1 Rationale for Expecting Success
This plan proposes to restore native Diegan sage scrub within the existing disturbed buffer area
that is bordered by non-native habitat to the east and west, wetlands to the north, and development
to the south. The buffer restoration area is currently a mixture of barren ground and annual grasses,
weeds, and invasive species. The soil within the restoration area appears to grow weeds,
ornamental plants, and invasive species readily, thus soil amending is not recommended. The
target vegetation and corresponding seed selection has been modeled after relatively undisturbed
native vegetation communities in the project vicinity. Seed will have local origins and be applied
during the optimal planting window (October to January) to maximize seed germination and
establishment. Weed control will be performed before they have a chance to set seed or create
significant cover, thereby allowing native hydroseeding and recruits to become established.
Fencing and signage will be installed to help minimize incursions by unauthorized persons. The
plant layout will mimic that of natural habitats and not be linear or uniform.
8.2 Target Functions
The primary function of the restored wetland buffer is to provide a native vegetative buffer
between the existing wetlands to the north and the proposed development area to the south. The
increase of native vegetative percent cover and stratification of plants on the slope will help reduce
erosion and sedimentation; help improve water quality by sedimentation (turbidity) of the wetlands
as a result of reduced erosion; help trap and uptake nutrients and other pollutants; provide a
physical barrier that will prevent incursions by people and domestic pets; reduce anthropogenic
and wind-borne trash deposition; reduce noise levels; buffer ambient nighttime light; and provide
habitat for native birds and terrestrial species.
8.3 Performance Standards
Performance standards must be attained within the restoration areas at the end of each year of the
5-year maintenance and monitoring program following installation. The performance standards
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are shown below for native vegetation cover, weed cover, species richness, and the overall average
height. These standards are established to help measure the success of the restoration area and keep
it on track to meet the final performance standards and sign off. Natural recruitment by native
species will also be considered a sign of success.
Should the habitat restoration specialist determine that any part of the restoration program is not
meeting the yearly performance standards, the habitat restoration specialist will recommend
corrective measures to the owner. The corrective measures will be implemented during the
following fall in order to bring the restoration program into compliance with the required
performance standards as quickly as possible. These corrective measures may include, but not be
limited to, re-seeding, applying fertilizer, or performing additional weeding, as recommended by
the habitat restoration specialist.
8.3.1 Success Criteria for Wetland Buffer Area
First-Year Performance Standards
• 40% native cover from hydroseeding and natural recruitment (by visual estimate)
• No more than 20% weed cover (by visual estimate)
• At least five native species present
• No more than 5% cover by invasive species such as pampas grass, artichoke thistle, fennel,
tree tobacco, castor bean, salt cedar, etc.
Second-Year Performance Standards
• 50% native cover from hydroseeding and natural recruitment (by visual estimate)
• No more than 15% weed cover (by visual estimate)
• At least six native species present
• No more than 5% cover by invasive species
Third-Year Performance Standards
• 60% native cover from hydroseeding and or natural recruitment (by visual estimate)
• No more than 10% weed cover (by visual estimate)
• At least six native species present
• No invasive species present
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• Evidence of natural recruitment of native species.
• Average habitat height of at least 18 inches
Fourth-Year Performance Standards
• 65% native cover from hydroseeding and or natural recruitment (by transect)
• No more than 10% weed cover (by transect)
• At least seven native species present
• No invasive species present
• Evidence of natural recruitment of native species.
• Average habitat height of at least 24 inches
Fifth-Year Performance Standards
• 70% native cover from hydroseeding and or natural recruitment (by transect)
• No more than 5% weed cover (by transect)
• At least seven native species present
• No invasive species present,
• Evidence of natural recruitment of native species.
• Average habitat height of at least 34 inches
8.3.2 Success Criteria for Wetland Buffer within FMZ/83 Area
First-Year Performance Standards
• 40% native cover from hydroseeding and natural recruitment (by visual estimate)
• No more than 10% weed cover (by visual estimate)
• At least four native species present
• No more than 5% cover by invasive species such as pampas grass, artichoke thistle, fennel,
tree tobacco, castor bean, salt cedar, etc.
Second-Year Performance Standards
• 50% native cover from hydroseeding and natural recruitment (by visual estimate)
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• No more than 10% weed cover (by visual estimate)
• At least four native species present
• No more than 5% cover by invasive species
Third-Year Performance Standards
• 60% native cover from hydroseeding and or natural recruitment (by visual estimate)
• No more than 10% weed cover (by visual estimate)
• At least five native species present
• No invasive species present
• Average habitat height of at least 12 inches
Fourth-Year Performance Standards
• 65% native cover from hydroseeding and or natural recruitment (by transect)
• No more than 10% weed cover (by transect)
• At least five native species present
• No invasive species present
• Average habitat height of at least 15 inches
Fifth-Year Performance Standards
• 70% native cover from hydroseeding and or natural recruitment (by transect)
• No more than 5% weed cover (by transect)
• At least five native species present
• No invasive species present
• Average habitat height of at least 18 inches
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9 COMPLETION OF 5-YEAR PROGRAM
9.1 Notification of Completion
Upon completion of 5 years of maintenance and monitoring, and/or attainment of the final fifth
year performance standards, the City will inspect the buffer restoration area to ensure successful
completion and give final approval in writing, if appropriate. If the project does not meet the
performance standards by the end of the fifth year, the habitat restoration specialist will make
recommendations to bring the project into compliance, and the maintenance and monitoring period
will continue until the standards are met.
9.2 Contingency Measures
Contingency measures will be implemented if the restoration program fails to meet the performance
standards at the end of the 5-year monitoring period. Such measures may include planting the
appropriate native species, applying additional seed, and/or conducting additional weed control.
9.3 Long-Term Management
Long-term management of the buffer will be consistent with the requirements of the Carlsbad HMP.
Long-term management of the restoration areas will commence upon final acceptance by the City.
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10 REFERENCES
City of Carlsbad. 2004. Habitat Management Plan for Natural Communities in the City of
Carlsbad. December 1999, as amended. Final approval November 2004. Accessed
October 2018. http://www.carlsbadca.gov/civicax/filebank/blobdload.aspx
?BlobID=27193.
Dreistadt, S.H. 2016. Pests of Landscape Trees and Shrubs: An Integrated Pest Management
Guide. 3rd ed. Richmond, California: University of California Division of Agriculture
and Natural Resources.
TAIC (Technology Associates). 2010. Guidelines for Riparian and Wetland Buffers. Prepared
for the City of Carlsbad Planning Department. San Diego, California: T AIC.
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