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FINAL
LAN OBGAPE PLAN
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This is a Land Use Planning Document, M
not a Construction Document
Refer to Civil Engineering Plans.
3.16 Erosion Control Matting
Erosion control matting can be used to mulch steep slopes or as an erosion control backup for use in
emergency situations. Matting will be applied in a down -slope fashion except for small, linear -oriented
areas of cut- or fill -slopes. In such cases, the matting can be applied across the disturbed slopes. The
application procedure described below will be followed.
The surface will be treated to eliminate surface irregularities. Stones and rock fragments which would
inhibit mulch placement will be removed. The matting will be applied smoothly but loosely over the surface
without stretching. The upgrade end of the mat should be buried in a trench at least 6 inches deep,
anchored with staples, and the trench backfilled and compacted. Where mat strips overlap, the mat will be
placed so that the upgrade mat overlaps the downgrade mat by 6 to 12 inches. Adjacent mart strips will be
overlapped approximately 3 to 4 inches. Matting will be anchored with staples driven flush with the
seedbed, along each edge, and down the center of the mat. Staples driven art the edges will alternate
linearly with those located down the center of the mat.
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S. G. Long - Lagunitas Redtail - 2003
watered during the first growing season following planting on a schedule to be determined by the
reclamation supervisor.
3.13 Native Hay or Straw Mulching
Mulching will be conducted immediately following seeding operations. The mulch will be spread
evenly by hand or mechanical blower. When mulching slopes, application will be initiated al the top of the
slope, working down -slope, where possible. Mulch will not be spread when wind velocities would prohibit
even distribution.
Approximately 2 tons of mulch per acre will be applied to all areas to be mulched. Native hay or straw
materials will not be chopped so fine as to inhibit mulch effectiveness or proper anchoring.
3.14 Native Hay or Straw Mulch Netting
;r
Netting will be used to anchor applied native hay or straw mulch on all areas too steep for, or
inaccessible to, agricultural machinery. Netting will, be applied in the following manner immediately
following mulch application.
su
All rocks and debris which would inhibit the proper installation of netting will be removed from the
slope prior to mulching. The netting will be applied over the straw smoothly but loosely without stretching
from the top to the bottom .of the slope. The top edge of the netting will be buried in a narrow trench 6
inches deep with staples anchoring the netting within the trench. Where nettingends meet, the upslope
end will overlap the downslope end by 4 inches. Where lateral edges of rolls meet, an overlap from either
side of 4 inches will be made. Staples will be inserted on a 1-foot spacing along the top and bottom edge
of the netting. Staples will be inserted every 4 feet down each edge and the center to form an x-shaped
pattern. All staples will be inserted so that they are flush with the seedbed.
3.15 Native Hay or Straw Mulch Crimping
Disking can be used to anchor applied native hay or straw mulch to slopes accessible to equipment.:
Disks used for this purpose will have dull and preferably notched, round -edged blades set perpendicular
to the soil surface. Crimping should be completed by traversing the entire mulched area and anchoring
the mulch, by rows, approximately 4 inches into the seedbed on 6- to 12-inch centers. A mulch crimper is
preferable and should be used in lieu of adisk implement, if available.
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S. G. Long - Lagunitas Redtail - 2003
a
3.10 Hand Raking
This treatment can be used on sites too small or steep for the use of conventional machinery. The
objectives of this technique are to prepare the seedbed for seeding, incorporate applied fertilizer into the
seedbed and cover broadcast seed. To accomplish these objectives, rafting will occur over the entire
disturbed area to the maximum depth feasible for seedbed preparation and fertilizer incorporation. Raking
to cover seed will consist of alighter treatment sufficient to provide asoil cover over the broadcast seed.
3.11 Seedling Planting
Individual seedling planting sites will be staked or otherwise identified prior to seedling planting by
the reclamation supervisor. At each selected planting site, a circular area (planting circle) will be cleared of
debris. The diameter of the circle will be approximately 12 to 24 inches depending upon the size of the
seedling. The receiving hole will then be dug to a depth 2 to 4 inches deeper than that necessary for
planting of bare -root or tubling stock and twice the size of the rootballs or containers for larger stock.
Planting holes can be dug by hand or with a power auger.
The hole will be of sufficient size to allow for positioning the seedling and tamping the backfill. After
the hole has been formed, it will be partially backfilled with loose seedbed material to allow planting to the
proper depth. The seedling will then be placed in the hole so that the root collar is slightly below the
ground surface and the roots are positioned as straight as possible. Following seedling placement, the
hole will be one-half backfilled with soil and then filled with water. The remainder of the seedbed material
will be backfilled into the hole as rapidly as possible without displacing water from the hole. The backfill will
be lightly tamped around the seedling. A second watering may be required to settle the backfill and
remove air spaces. Planting will be accomplished to the same depth as the seedling was grown in the
container. The watering step may be eliminated when planting into saturated or flooded wetland sites.
A basin, which slopes gently from the outside of the planting circle to the seedling stem, will be
formed from excess backfill material to aid in water catchment. The basin may be mulched with straw and
the straw anchored by the appropriate means, if specified.
3.12 Tree Planting
Techniques to be used to plant trees will be those specified by the nursery supplying the stock or
the contractor employed to plant the trees. In any event, the techniques noted under Seedling Planting
regarding hole formation, backfilling, and watering win be observed when planting trees. In addition, the
planting circle will extend from the drip line to the trunk of the tree at a minimum. All stock over five feet in
height will be staked according to accepted procedures to promote tree stabilization. Stock will be
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S. G. Long - Lagunitas Redtail - 2003
I
type fertilizer is preferred as asource of nitrogen. Additionally, fertilizer materials with the lowest sale index
available should be used.
3.8 Drill Seedinq
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S
Drill seeding is preferred for planting operations where aerial conditions permit. Drill seeding will be
completed using adrill implement preferably equipped with the following features:
• depth bands- to allow seeding at the proper depth,
-' • seedbox agitator- to promote seed mixing,
• seedbox baffels- to aid in even seed distribution among rows,
"! •seed -metering device- to promote even seed distribution within rows,
=i • furrow openers- to permit proper seed placement from seed spouts, and
• drag chains- to aid in seed coverage
:s
To complete the drilling operation, seedboxes will be loaded with the seed mixture and the drill
$' calibrated. Rice hulls or other inert materials, if necessary, can be used to promote seeding at the proper
rate. The drill will be adjusted to plant seed to the proper depth. The depth of seeding will be
7 approximately 0.25 to 0.50 inch under normal circumstances. Drill row spacing will be set at approximately
6 to 8 inches. The drill will be towed across the seedbed to complete the planting operation. Drill seeding
will take place immediately following the completion of final seedbed preparation techniques.
3.9 Broadcast Seeding
Broadcast seeding will be accomplished using hand -operated "cyclone type" seeders or rotary
broadcast equipment attached to construction or revegetation machinery. All machinery will be equipped
with metering devices. Broadcasting by hand will be acceptable on small, isolated sites. When broadcast
seeding, passes will be made over each site to be seeded in a manner to ensure an even distribution of
seed. When using hopper type equipment, seed should be frequently mixed within the hopper to
discourage seed settling and an uneven planting distribution of species.
Broadcast seeding will take place immediately following the completion of final seedbed preparation
techniques. Broadcast seeding should not be conducted when wind velocities would prohibit even seed
distribution. The broadcast seeding rate for herbaceous species will be twice the rate of drill seeding.
Woody species will be established by broadcast seeding methods only.
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S. G. Long - Lagunitas Redtail 2003
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Accompanying each composite sample should be a brief discussion of the area from which the
,
sample was collected. The discussion should include comments concerning:
• plant species to be established,
• type of seedbed preparation techniques to be employed,
• type of mulching practices to be employed, if applicable,
" • approximate slope,
• any special problems or conditions such as cheatgrass infestation, and
• past and future land use considerations.
3.5 Disking
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Disking will be applied as a seedbed preparation and fertilizer incorporation treatment on areas that
^` will be seeded, as specified. Offset -disk implements are preferred for use due to the characteristics of
L. seedbed materials. To complete the disking operation, the disk win be towed, behind an .agricultural tractor
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Ed aspeed which minimizes surficial disturbance and optimizes fertilizer incorporation.
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3.6 Harrowing
k Harrowing is the preferred method of seedbed preparation for areas which are accessible to
revegetation equipment, particularly where cover crops have been used as a mulching method. A
flexible -tine harrow is preferred where excessive amounts of rock fragments occur in the seedbed
material. With respect to more conventional equipment, a spring -tooth harrow is preferred over a spike -
tooth implement though both types are acceptable for use. Harrowing is applicable for seedbed
L
preparation, incorporating fertilizer into the seedbed, and for covering broadcast seed. As with disking,
passes over the seedbed should be kept to the minimum necessary to meet operational objectives.
3.7 Broadcast Fertilization
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Fertilizer will be broadcast over the seedbed using hand operated "cyclone type" seeders or rotary
broadcast equipment attached to construction or revegetation machinery. When an area is disked or
harrowed to complete seedbed preparation, broadcast fertilization can occur simultaneously with disking
or harrowing to simplify the revegetation process. All equipment used will be equipped with metering
devices. Fertilizer application will take place prior to the final seedbed preparation treatment to ensure the
incorporation of fertilizer into the seedbed. Fertilizer broadcasting operations should not be conducted
when wind velocities would interfere with even fertilizer distribution.
Fertilizer will be applied at rates commensurate with recommendations resultant from seedbed material
-- sample analysis. All nutrients, with the possible exception of nitrogen, will be applied in a single
application. Nitrogen application may be delayed one growing season to reduce the chances for weed
infestation. The most soluble phosphorus fertilizer material should be selected for use. A slow -release
6
' S. G. Long - Lagunitas Redtail - 2003
J I
3.4 Seedbed Material Sampling
General Procedures
_�
The laboratory selected to analyze the samples should be contacted at least 15 days in advance of
the sampling period to aid in coordinating sample analysis with the beginning of revegetation activities on
site. All samples should be taken with either a tile spade or soil auger. This equipment will be free of all
foreign substances and rust. No galvanized tools should be used. Approximately 1 quart of material need
be collected for each sample.
All samples will be placed in dean polyethylene bags at the time of collection and securely sealed for
delivery to the laboratory. All efforts should be made to deliver the samples to the laboratory as soon as
possible. When samples cannot be delivered within 24 hours of collection, samples should be air-dried.
Approximately 48 hours can be considered a sufficient time for air -dying. Samples should be dried in as
dust -free of an environment as is possible.
Specific Procedures
Two samples need be collected representing the surface 24 inches of seedbed material at each
sampling point. Where soil has been respread over the surface to be reclaimed, the upper sample will
represent the depth of soil applied and the lower sample the sub -base material to a depth of 24 inches.
Where soil has not been applied, two samples should be collected representing the 0 to 12 inch and 12 to
24 inch depths of seedbed material. For each set of samples, the average slope and estimated percent
coarse fragment content by volume need be noted.
At least one set of samples should be taken for each specific treatment area to be reclaimed. The
number of samples to be collected will be at the discretion of the revegetation supervisor. Sample
compositing for larger acreages is recommended. All sample site locations will be noted on aproject map.
Each sample should be analyzed at aminimum for:
• pH,
• texture (field method),
-� • percent organic matter,
• NH4-N and NO3-N (ppm),
• phosphorus (ppm),
• potassium (ppm),
• electrical conductivity (mmhos/cm),
lime estimate, and
• sodium adsorption ratio ,if advisable.
Other parameters may be added where prior sampling results indicate the potential for plant
establishment and growth constraints related to growth medium chemical or physical characteristics.
I 5
S. G. Long - Lagunitas Redtail - 2003
3.0 TECHNIQUE SPECIFICATIONS
3.1 General
i
-A Areas outside the limits of the site(s) to be revegetatod will not be disturbed, excepting those areas
specifically set aside for staging, or as directed by the revegetation supervisor. All perimeter erosion
r control measured need be in place prior to site disturbance activities. Site -specific erosion control
measures will be installed as soon as practical following the completion of site disturbance activities
including grading, resoiling, planting, etc. Any erosion control measure damaged, removed prematurely,
or rendered inoperative will be repaired/replaced as soon as the condition has been discovered.
4
On slopes accessible to common agricultural machinery, all operations will be conducted along the
;a contour as governed by safety considerations. On slopes accessible to construction equipment, but
inaccessible to agricultural machinery, all operations will be conducted so as to avoid creating conditions
that increase or enhance downslope surface or subsurface flow patterns. On level or nearly level sites, as
aerial conditions permit, a9 equipment operations will be conducted perpendicular to the prevailing wind
direction.
3.2 Ripping
Ripping wid_be accomplished by adozer equipped with asingle or twin set of ripper shanks. Ripping
will be completed to a depth of at least 1 or 2 feet, as specified, on approximately 2- to 4-foot centers.
Ripping will be completed at a speed which maximizes the action of the ripper shanks and promotes
material disruption to the required depth. Material type and compaction levels will be major factors in
I- determining tractor speed.
3.3 Seedbed Material Application
Seedbed material will be applied as soon as possible after grading and/or ripping. Equipment utilized
will be capable of applying this material in the prescribed manner given slope, application depth, and aerial
extent as well as material characteristic considerations.
Seedbed material will be spread to an even depth as per resoiling specifications. The number of
- equipment passes over the site will be kept to the minimum necessary to properly complete material
application and avoid unnecessary compaction. Seedbed materials should not be handled when such
-_ materials contain a moisture content which would inhibit proper application or contribute to excessive
compaction or crusting. The surface of reapplied materials will be left in a roughened condition to inhibit
erosion while providing aproper surface for the application of subsequent revegetation techniques.
4
j S. G. Long - Lagunitas Redtail - 2003
2.0 CARE OF DELIVERED MATERIALS
Commercially purchased seedlings and tree stock will be delivered to the construction site as close to
the time of planting as possible. Upon receipt of the shipment, plants will be inspected for moisture status
and condition. All seedlings will be watered upon arrival, as necessary, to keep the root system in a moist
condition. Watering will be repeated every four days, as needed, following this date until planting. No
fertilizer materials will be applied to stored plants. Plants will be stored in such amanner as to:
-' • avoid or reduce moisture stress,
.I
• avoid excessive heat or cold,
- • protect plants from wind and mechanical damage, and
• provide astaging area for subsequent planting activities.
All fertilizer, seed, and mulch materials will be retained in shipping bags until they are to be used.
These materials will be stored in a protected area in a manner to prevent them from coming in contact with
incident precipitation or surface water.
3
S. G. Long - Lagunitas Redtail - 2003
P�
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C. 1
REVEGETATION TECHNICAL SPECIFICATIONS _
i J, MATERIALS, METHODS, AND TECHNIQUES
The following specifications have been prepared to aid in implementing the revegetation plans
prepared for this project. These specifications may be used as a reference to develop formal bid
packages should Lagunitas prefer to contract out any or all of the field reclamation portion of this project.
These specifications can also be used for guidance when erosion control measures must be employed on
an emergency basis or to serve as a technical base when making future site stabilization plantings.
Specifications for a wide variety of materials and revegetation techniques, other than those specified in
the plan, are included herein should the purchase of such materials or use of such techniques be
necessary for any reason.
1.0 MATERIAL SPECIFICATIONS
The following specifications are presented to identify the quality of materials that should be
purchased to complete revegetation activities. Efforts should be made to follow these specifications,
although minor deviations may be required due to the commercial availability of various materials within the
region art the time of purchase.
1.1 Fertilizer
All fertilizer material will be furnished in waterproof or water-resistant bags. Each bag must be marked
with the weight and manufacturer's guaranteed analysis of the contents showing the percentage of each
ingredient contained.
1.2 Commercially Purchased Seed
Seed will be furnished in standard containers with seed name; lot number; net weight; and
percentages of purity, germination, hard seed, and maximum weed seed content dearly marked for each
type of seed. Seed supplies will not contain the seeds of any State -recognized noxious weed species. A
certificate stating that each seed lot has been tested by a laboratory with respect to the above
requirements will be delivered with the seed.
Only certified seed of named varieties shall be used where varieties are specified and can be
obtained. Sources for "common" seed should be those with climatic and elevational characteristics as
close to project site characteristics as possible. Legume seed will be inoculated with the correct rhizobium
prior to shipping. All legume seed will be planted prior to the expiration date on the inoculum tag or
reinoculated within 24 hours prior to planting.
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S. G. Long - Lagunitas Redtail - 2003
:.1
TABLE OF CONTENTS
Page
1.0 Material Specifications...............................................................................................................1
1.1 Fertilizer.................................................................................................................................1
1.2 Commercially Purchased Seed ................. :..............................................................................
1
1.3 Seedlings and Tree Stock.......................................................................................................2
1.4 Native Hay or Straw Mulch.......................................................................................................2
1.5 Erosion Control Matting..........................................................................................................2
1.6 Plastic Netting and Staples......................................................................................................2
2.0 Care of Delivered Materials.........................................................................................................3
3.0 Technique Specifications..........................................................................................................4
3.1 General..................................................................................................................................4
3.2 Ripping..................................................................................................................................4
3.3 Seedbed Material Application..................................................................................................4
3.4 Seedbed Material Sampling....................................................................................................5
3.5 Disking..................................................................................................................................6
3.6 Harrowing..............................................................................................................................6
3.7 Broadcast Fertilization.............................................................................................................6
3.8 Drill Seeding..........................................................................................................................7
3.9 Broadcast Seeding.................................................................................................................7
3.10 Hand Raking........................................................................................................................8
3.11 Seedling Planting.................................................................................................................8
3.12 Tree Planting.......................................................................................................................8
3.13 Native Hay or Straw Mulching.................................................................................................9
3.14 Native Hay or Straw Mulch Netting..........................................................................................9
3.15 Native Hay or Straw Mulch Crimping.......................................................................................9
3.16 Erosion Control Matting......................................................................................................10
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S. G. Long - Lagunitas Redtail - 2003
M
REVEGETATION TECHNICAL SPECIFICATIONS
MATERIALS, METHODS, AND TECHNIQUES
Prepared for:
Lagunitas Companies
Fort Collins, Colorado
Prepared by:
CC191DAM CCMIK A10Q(CDCIIA1ri 0, INC.
Fort Collins, Colorado
February 2003
PM
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APPENDIX: REVEGETA71ON TECHNICAL SPECIFICATIONS
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6.0 MANAGEMENT AND MAINTENANCE
No earth -moving activities will be permitted outside the boundaries of the area to be
revegetated except as provided for in the site development plans. Adjunct disturbances related to
the installation of erosion control or site stabilization measures are also excepted. All
disturbances to wetland mitigation areas will be avoided.
All erosion control measures will be kept in good condition until revegetation is deemed
acceptable by the City or it is obvious that the site is stable and the installed measures are no
longer required. Within this time -frame, any erosion control measure removed prematurely or
damaged will be immediately replaced or repaired.
Permanent revegetation plantings will be inspected at least bi - monthly during the first three
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growing seasons following planting and/or immediately following periods of intense rainfall. Areas
of poor "seed take" will be noted. Any area remaining unvegetated by desirable species
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throughout the first three growing seasons will be reseeded following the application of site
preparation techniques during the next Fall planting season. Seeded areas will then be straw -
La
.mulched and the mulch crimped into the seedbed using manual methods or anchored by netting.
Any areas found to be devoid of a mulch cover following the initial seeding will be re -mulched as
soon as the condition is discovered. Where shrub and tree stock survival rates fall below that
P� acceptable to the City, replacement stock will be planted, using the proper techniques, during the
�l next appropriate planting season.
If nutrient deficiency symptoms develop on revegetated areas, this condition will be
remedied by adding the proper nutrients in the proper amounts. Where slips, slides, or slumps
occur on slopes, such will be remedied as soon as soil conditions permit.
No mowing, trimming, or other vegetation modifying activities will be permitted in the
revegetated area unless directly associated with a planned weed control program. Trimming or
removal of diseased planting stock will also be permitted.
Irrigation systems will be kept in good repair and function as designed. Water will be applied
judiciously and in amounts sufficient to augment/supplement natural rainfall. In no case will
irrigation be used to create soil moisture regime conditions which would, though the application of
excessive amounts of water, support plant species or plant productivity levels which could not be
sustained- when irritation activities are terminated. The exception to this is the use of
supplemental water in the initial years following planting to insure the establishment of shrub
seedlings and tree stock.
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TABLE 4
SPRING REVEGETATION SCHEDULE
Month
Reclamation Techni ue J F M A M J J A S 0 N D
Excavation/Grading Any month
Resoiling and/or Ripping (if necessary) XXX
Seedbed Material Sampling XXX
Fertilization XX
Seedbed Preparation XX
Seeding XX
Mulching XX
Seedling and Tree Planting XX
Note: Weather and surface conditions permitting, the earlier in the season planting is completed
the higher the potential for revegetation success.
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=_ 5.0 REVEGETATION SCHEDULE
Excavation and grading may ordinarily occur during any month of the
year. However,
revegetation activities are more limited with respect to the time of year in which they should be
" completed and must be timed to coincide with a recognized planting season. The following tables
depict the Fall and Spring revegetation schedules, on a monthly basis, to be followed to achieve
:r -the revegetation objectives set for this project. Site conditions and/or climatic variations may
.require that these schedules be modified somewhat to achieve reclamation success. The
schedules do not reflect any weed control or irrigation programs which might be employed on site,
and would be modified to incorporate such programs as they are developed.
TABLE 3
Z.
FALL REVEGETATION SCHEDULE
Month
Reclamation Technique J F M A M J J A S O N D
Excavation/Grading Any month
Resoiling and/or Ripping (if necessary)
XXX
Seedbed Material Sampling
XXX
Fertilization
XXX
Seedbed Preparation
XXX
Seeding
XX
Mulching
XX
Seedling and Tree Planting (following year)
XX
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4.0 WEED CONTROL PLAN SUMMARY
.This section summarizes the elements of the weed control plan which will be prepared in
detail following approval of this project. The completed plan will be submitted to local, State, and
Federal agencies as required for review and approval.
The weed control plan will be prepared by a Licensed Commercial Pesticide Applicator
x _ -(LCPA). All subsequent weed control activities will also be conducted by an LCPA. The plan to
be prepared will take the form of an Integrated Pest Management Plan (IPM) which will consider
all methods of control which would potentially be applicable to the project area. These methods
L include mechanical, chemical, cultural, and biological techniques. Prior to plan preparation, a visit
T--_-to the project area will be conducted by the LCPA to assess site conditions, routes of access,
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weedy species present, the relationship of wetlands to the proposed area to be treated, potential
sources of run-on and run-off, wind conditions, and any other factors relevant to the weed control
planning process. Given the presence of wetlands in and near the project area, initial emphasis
Will be given to weed control methods other than those of a chemical nature.
Chemical herbicides do exist which are safe and applicable for use in and near wetlands and
it Waters of the U. S. Where necessary, safe and efficient chemical control methods will be
plo&&yed. ;In such cases, it is likely that herbicide use would take the form of "spot' applications
reduce the potential for herbicide drift. Herbicide transportation, storage, mixing, loading,
)lication, and disposal methods will comply with all applicable requirements of State and
iecies�to be considered as weeds and controlled are defined as "noxious weeds" by
ity.''These species are Canada thistle (Cirsium arvense), Dalmation toadf lax (Linaria
diffuse knapweed (Centaurea diffusa), leafy spurge (Euphorbia escula), musk thistle
!tans), Russian knapweed (Acroptilon repens), spotted knapweed (Centaurea
ellow toadf lax (Linaria vulgaris).
art✓ YA+� -
• �:aw t .aJ.:. .
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3.0 ADJUNCT AREA STABILIZATION
During construction, the soil surface may be disturbed at equipment staging areas and
similar sites resulting in a loss of vegetative cover. In such cases, extensive application of
revegetation techniques is not desirable where a more simplistic range of restoration techniques
will suffice. The following alternatives to intensive reclamation will be applied where conditions
warrant.
• Supplemental fertilization: The disturbed area will be broadcast fertilized at recommended
rates where it is determined that the remaining vegetation can successfully stabilize the
area with a supplemental fertilizer treatment.
• Supplemental seeding: The disturbed area will be seeded where it is determined that the
existing plant cover is not sufficient to hold soil in place. Minimal seedbed preparation
and soil covering will be acceptable. This alternative may be combined with
supplemental fertilization as necessary. The seed mixture to be used is depicted in Table
is Stockpile and Adjunct Disturbance Planting Mixture.
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TABLE 2
NATIVE PRAIRIE MIXTURE
S ecles
Preferred
Varieties
Rate LbsJAcre
Planted Broadcast
PLS
Seeded/Acre
Green needlegrass
Lodorm
3.00
549,000
Stipa viridula
Thickspikewheatgrass
Critana
7.00
1,302,000
Elymus lanceolatus
Western wheatgrass
Arriba, Barton
7.00
882,000
Pascopyrum smithii
Lewis (Blue) flax
Appar
1.00
285,000
Adenolinum lewls#
Purple prairie clover
Kaneb
1.00
275,000
Dalea purpurea
Upright prairie coneflower
None
1.00
450,000
Ratibida columnitera
Four -wing saltbush
Wytana
12.00
624,000
Atriplex canescens
Rubber rabbitbrush
None
1.00
670,000
Chrysothamnus nauseosus.
Winterfat
None
2.00
222,000
Ceratoides Janata
Totals = 35.00
5,259,000
(-121 seeds/ sq. ft.)
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TABLE 1
STOCKPILE AND ADJUNCT DISTURBANCE PLANTING MIXTURE
Species
Preferred
Variety(s)
Rate LbsJAcre
Planted (Broadcast)
PLS
Seeded/Acre
Green needlegrass
Lodorm
4.00
724,000
Stipa viridula
Slender wheatgrass
Primar, Revenue
4.00
640,000
Elymus trachycaulas
Thickspike wheatgrass
Critana
6.00
1,116,000
E/ymus lanceolatus
Western wheatgrass
Arriba, Barton
9.00
1,134,000
Pascopyrum smithii
Totals = 23.00
3,614,000
(-83 seeds/ so. ft.)
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anchored. Hydromulching methods are also acceptable so long as the seed is not applied
simultaneously with the mulch. In the spring of the second growing season, the recommended
amount of nitrogen will be broadcast over the planted seedbed.
All surface equipment operations will be completed perpendicular to the slope angle where
aerial and safety conditions permit.
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2.2.2 Shrub and Tree Plantings
Shrub seedling and tree plantings will be completed in the buffer zone at the locations and
rates shown on the landscape plan included in the Map Pocket. All trees eliminated by grading
7 and construction activities in the buffer zone will be mitigated for on an "in -kind" basis excepting
those deemed by the City to be a nuisance species.
A variety of native shrubs will also be planted in conjunction with the required trees to
increase the wildlife habitat values of the buffer area. The shrubs to be planted were selected for
RYtheir adaptive characteristics and their ability to provide wildlife food and/or cover. Planting sites
will be staked in the field to prevent overseeding with the Native Prairie Mixture. The drought-
�e tolerant species will be planted in drier upland areas while more mesic adapted species have
U been selected for use in transitional areas. Shrub massings will assume a more narrow, linear
F, form to blend with the surrounding topography and reduce erosion potential.
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process. The seed mixture to be used is depicted in Table is Stockpile and Adjunct Disturbance
Planting Mixture.
2.1.3 Soil Redistribution
Prior to redistribution, the subsoil graded to design specifications and upon which the soil will
be respread will left in a roughened condition to reduce the potential for mass movement of the
reapplied soil. The seedbed will then be ripped on the contour to relieve compaction and aid
plant establishment. Ripping may be eliminated from the sequence if subsoil compaction is
considered to be of no consequence to plant establishment and growth.
During resoiling operations, soil will be redistributed in a manner which: (1) achieves an
approximate uniform thickness consistent with safety requirements, post -disturbance land use
objectives, and surface water drainage systems; (2) minimizes compaction and erosion of the soil
resource; and (3) minimizes deterioration of the biological, physical, and chemical properties of
the soil to the degree possible.. Soil will be applied in as thick of lifts as possible to minimize
equipment passes over the resoiled area. All final grading will be completed along the contour,
where safety conditions permit, to minimize erosion and maximize site stability. Ideally, soil will
be applied on areas to be revegetated within 30 days prior to seeding.
Soil will be redistributed to an average depth of approximately 12.0 inches. As with salvage
activities, a replacement depth range of from 9.0 to 15.0 inches will be acceptable so long as an
average 12.0-inch depth is achieved across the buffer area.
2.2 Buffer Area Revegetation
2.2.1 Buffer Area Herbaceous Seeding
Following soil redistribution, the disturbed area will be left in a roughened condition. Soil
samples will then be taken for laboratory analysis. Fertilizer (excepting nitrogen) will be
broadcast over the seedbed at rates specified as a result of soil tests. The seedbed will be
harrowed or otherwise roughened to incorporate the fertilizer into the applied soil and prepare the
area for seeding. (Fertilizer will be applied in a split application to decrease weed invasion during
seedling establishment.)
Following surface roughening, the seed mixture shown in Table 2: Native Prairie Mixture will
be evenly broadcast over the seedbed using manual methods or hydroseeding techniques. The
planted area will then be mulched with the equivalent of 2 tons of straw per acre and the mulch
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2.0 REVEGETATION SPECIFICATIONS
The primary objectives of revegetation/mitigation are to stabilize the soils of the graded
buffer zone, successfully complete shrub and tree mitigation plantings, and create useful wildlife
habitat in terms of cover and food sources. To this end, a variety of native grass, forb, shrub, and
tree species have been selected for planting based, variably, on their rapid establishment
potentials, soil/hydrologic adaptations, and wildlife habitat values. In addition, the forb species
selected for planting are all typical components of regional native prairie systems and exhibit
flowering characteristics valuable with respect to esthetic concerns.
2.1 Soil Handling and Grading
2.1.1 Soil Salvage and Stockpiling
That portion of the project area to be seeded/planted will be stripped of the surface sod to a
depth of <6.0 inches to reduce the potential for weed/introduced grass establishment. Following
sod removal, soil will be stripped from the site to an average depth of 12.0 inches. A variable
stripping depth of from 9.0 to 15.0 inches is assumed due to equipment limitations.
The stockpile will be protected from operational disturbances to maintain facility integrity.
The stockpile will assume as low a profile as possible to decrease wind erosion potential and be
oriented, along the longitudinal axis, perpendicular to the prevailing wind direction, if possible, to
reduce wind erosion. When portions of the stockpile are removed for soil redistribution, removal
will begin on the leeward side of the stockpile to avoid disturbance on the windward side.
Stockpiles will be clearly identified with signs to distinguish them from subgrade or other
construction materials. Stockpiles will be located outside the limits of delineated wetlands and
other Waters of the U.S. regardless of U. S. Army Corps of Engineers jurisdictionality.
2.1.2 Soil Stockpile Stabilization
The stockpile will be vegetatively stabilized during the first appropriate planting season
following construction if the stockpile will exist through one or more growing seasons. During
construction, the surface of the stockpile will be left in a roughened condition. Fertilizer will be
evenly broadcast over the stockpile surface at recommended rates and the seedbed roughened
to incorporate the fertilizer into the seedbed. Seed, at the specified rates, will then be broadcast
over the seedbed. The seedbed will be lightly roughened to cover the seed. The slopes will then
be mulched using straw or hydromulch and the mulch anchored to complete the stabilization
2
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1.0 INTRODUCTION
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Lagunitas Companies is currently proposing a development known as the Redtail Project.
. As the design phase of this project progressed, an incursion into the buffer zone established to
protect the adjacent wetlands was deemed necessary to accommodate development/utility
requirements. As a result, mitigation will be required to address this incursion. Mitigation will take
`. the form of a variety of native grass, forb, shrub, and tree plantings to restore and enhance the
wildlife habitat values and characteristics of the buffer zone. The buffer zone proper parallels the
main project drainage within which lie three constructed ponds. That portion of the buffer zone
subject to the plantings described below includes all areas not impacted by building footprints,
roads, utility corridors requiring special surfacing, wetland mitigation areas, and formally
landscaped sites.
The following sections present the revegetation plan prepared for the upland portions of the
buffer zone to be impacted. (The wetland mitigation plan prepared for this zone was submitted
under separate cover to the U. S. Army Corps of Engineers as a part of the required Nationwide-
39 permit application.) Section 2.0 presents the revegetation technique sequences that will be
used to revegetate the site. Seedbed preparation, planting, and mulching techniques are
addressed. Seed mixtures are also included. Adjunct area stabilization techniques are presented
in Section 3.0. Sections 4.0, 5.0, and 6.0 discuss weed control, revegetation schedules, and
management/maintenance activities, respectively. Appendix A presents technical specifications
to aid in the implementation of this revegetation plan. A map is included at the end of this report
depicting the shrub and tree plantings to be completed.
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TABLE OF CONTENTS
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Tableof Contents................................................................................................................................... i
1.6 Introduction..................................................................................................................................... 1
2.0 Revegetation Specifications............................................................................................................ 2
3.0 Adjunct Area Stabilization............................................................................................................... 7
4.0 Weed Control Plan Summary .......................................................................................................... 8
5.0 Revegetation Schedule................................................................................................................... 9
6.0 Management and Maintenance..................................................................................................... 11
Appendix : Revegetation Technical Specifications
Map Pocket
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REVEGETATION PLAN`'' .
for the
REDTAIL PROJECT BUFFER ZONE
Prepared for the:
LAGUNITAS COMPANIES
Fort Collins, Colorado
Prepared by:
(CPI(DAIR (Camm Assocumms, INC.
Fort Collins, Colorado