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MAP: WETLANDS IMPACTED AND MITIGATION AREAS
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4.2 Seedlings/Emergents
Aquatic and Wetland Company
9999 Weld County Road 25
Fort Lupton, Colorado 80621
Bitterroot Restoration, Inc.
445 Quast Lane
Corvallis, Montana 59828
406-961-4991
Fossil Creek Nursery
4919 S. College Ave.
Fort Collins, Colorado 80525
970-226-4924
Kesters Wild Game Food Nurseries, Inc.
P. O. Box 516
Omro, Wisconsin 54963
414-685-2929
Pleasant Avenue Nursery, Inc.
P. O. Box 257, 506 South Pleasant Ave.
Buena Vista, Colorado 81211-0257
719-395-6955
Sun Chaser Natives
14290 W. 54th Ave.
Arvada, Colorado 80002-1512
303-278-9725
4.3 Willow Cuttings
Cuttings will be taken from live willow stands located within the project area and, as necessary, from stands
as close to the project area as is feasible, given legal site access. The number of cuttings collected from
any one source will be such that the viability of the parent stand is not jeopardized. Cutting collection
techniques will follow the guidelines specified in Section 3.0 Technique Specifications, above.
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S. G. Long - Lagunitas - Redtail Project - 2003
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4.0 PARTIAL LIST OF PLANTING MATERIAL SUPPLIERS
The following sub -sections list sources which typically stock planting materials for the species
referred to in this document. Other sources also exist which stock quality planting materials and may be
contacted for price quotes.
4.1 Seeds
Arkansas Valley Seed Co.
4625 Colorado Blvd.
P. O. Box 16025
Denver, Colorado 80216
303-320-7500
Anderson Seed Company
110 Anderson St.
P. O. Box 1017
Lamar, Colorado 81052
719-336-2226
Beauty Beyond Belief
1730 South College Avenue #104
Fort Collins, Colorado 80525
970-221-3039
Bitterroot Restoration, Inc.
445 Quast Lane
Corvallis, Montana 59828
406-961-4991 .
Granite Seed
1697 West 2100 North
Lehi, Utah 84043
801-768-4422
Attn: William Agnew
Miller Grass Seed Co., Inc.
P. O. Box 81823
1600 Comhusker Highway
Lincoln, Nebraska 68501
402-438-1232
Southwest Seed
P. O. Box 1604
605 25th Street
Greeley, Colorado 80632
970-356-7002
Western Native Seed
P.O. Box 188
25 Pine Edge Dr.
Coaldale, Colorado 81222
719-942-3935
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S. G. Long - Lagunitas - Redtail Project - 2003
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77 3.19 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
jjthe mulch, by rows, approximately 4 inches into the seedbed on 8- to 12-inch centers. A mulch crimper is
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preferable and should be used in lieu of adisk implement, I available.
3.20 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
R inhibit mulch placement will be removed. The matting will be applied smoothly but loosely over the surface
without stretching. The upgrade end of the mad should be buried in a trench.al least 6 inches deep,
anchored with staples, and the trench backfilled and compacted. Where mat strips overlap, the mad will be
placed so that the upgrade mad overlaps the downgrade mad by 6 to 12 inches. Adjacent mad 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 at the edges VAR alternate
linearly with those located down the center of the mat.
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S. G. Long - Lagunitas - Redtail Project - 2003
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(— slope, working down -slope, where possible. Mulch will not be spread when wind velocities would prohibit
I even distribution.
rApproximately 2 tons of mulch per acre will be applied to all areas to be mulched. Native hay or straw
Li materials will not be chopped so fine as to inhibit mulch effectiveness or proper anchoring.
3.17 Hydromulching
This technique can be used on steeper slopes or to provide a mulch cover on areas too small to
permit native hay or straw mulching. Hydromulch will be applied at arate greater than or equal to 1500 lbs.
of mulch per acre. Rates up to 3,000 to 3,500 lbs. per acre may be required for steeper slopes and or
critical areas. A tackifying agent will be added to the slung to ensure mulch stability. The pH of the mulch
slung will be greater than or equal to 3.5. This technique will be applied immediately after seeding but will
not be applied under freezing conditions or over standing water. The hydromulch machine should be
equipped with an emulsion induction system.
The prescribed amount of water, mulch, and tackifying agent will be loaded into the mulch tank.
(Seed wig be applied in a separate operation.) These components will be mixed into a homogeneous
Slurry in the tank. The slurry will remain agitated throughout the mulching process and be applied
uniformly over the seedbed to be treated.
3.18 Native Hay or Straw Mulch Netting
Netting will be used to anchor applied native hay or straw mulch on all areas too steep for, or
to
inaccessible to, agricultural machinery. Netting wig be applied in the following manner immediately
rfollowing mulch application.
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All rocks and debris which would inhibit the proper installation of netting will be removed from the
f slope prior to mulching. The netting will be applied over the straw smoothly but loosely without stretching
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from the top to the bottom of the slope. The top edge of the netting wig be buried in a narrow trench 6
inches deep with staples anchoring the netting within the trench. Where netting ends meet, the upslope .
L 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 wig 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
r : pattem. All staples will be inserted so that they are flush with the seedbed.
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S. G. Long - Lagunitas Redtail Project - 2003
Willow sprig collection will take place from healthy willow stands in mid- March to mid -April before the
r willows break dormancy. Source stands should be located in or near the same drainage as the planting
area, if possible. Stems will be cut from the parent plant to alength of 12-18 inches. The basal cut will be
made immediately below anode at a 45-degree angle. Stem diameter win not exceed approximately 1
inch. Stem material 1-2 years old will be preferred. Cuttings will be stored, N storage is necessary, under
freezing conditions with a wet towel wrapped around the base of stem bundles to prevent desiccation
until the time of planting.
To complete willow cutting planting, each cutting will be pushed into the ground such that 2 to 3
inches of cutting remains above the seedbed surface. A bar or similar instrument may be used to prepare
a planting hole. Where apreformed hole is used, soil must be tamped around the planted stem to remove.
airspaces. The proximal end of each cutting will be dipped in indolebutyric acid (IBA) prior to planting to
promote root formation. Stem "polarity" will be maintained throughout the cutting collection and planting
R process.
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3.14 Planting Emergents (Schoenoplectus, Etc.)
Tubers and root cuttings of emergent species should be planted according to the directions
provided by the supplier. At the least, plantings should be made in wet soil such that the tuber or root is
covered by 2 to 3 inches of soil with the cover soil packed firmly.. Where planting material exhibits
developed "growing points", these structures should remain above the soil surface following planting.
3.15 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 will 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
watered during the first growing season following planting on a schedule to be determined by the
reclamation supervisor.
3.16 Native Hay or Straw Mulching
Mulching wig be conducted immediately following seeding operations. The mulch will be spread
evenly by hand or mechanical blower. When mulching slopes, application will be initiated at the top of the
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S. G. Long - Lagunftas - Redtail Project - 2003
1.!
3.10 Hydroseeding
This technique can be used on slopes too steep for drill seeding. Seed will be applied in a separate
Coperation and not combined with the mulching step. This technique will be applied immediately following
fertilizer incorporation. The pH of the slurry will be greater than or equal to 5.0. The slurry will be agitated
fthroughout the seeding process. During implementation, care will be taken to apply seed evenly over the } area to be seeded.
3.11 Hand Rakind
This treatment can be used on sites too small or steep for the use of conventional machinery. The
C 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, raking 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. .
3.12 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 apower 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
i 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, N specified.
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S. G. Long - Lagunitas - Redtail Project - 2003
type fertilizer is preferred as asource of nitrogen. Additionally, fertilizer materials with the lowest salt index
available should be used.
3.8 Drill Seeding
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,
r • seedbox agitator- to promote seed mixing,
t ... • seedbox baffels- to aid in even seed distribution among rows,
• seed -metering device- to promote even seed distribution within rows,
• furrow openers- to permit proper seed placement from seed spouts, and
• drag chains- to aid in seed coverage
To complete the drilling operation, seedboxes will be loaded with the seed mixture and the drill
calibrated.. Rice hulls or other inert materials, K necessary, can be used to promote seeding as the proper
rate. The drill .will be adjusted to plant seed to the proper depth. The depth of seeding will be
approximately 0.25 to 0.50 inch under normal circumstances. Drill row spacing will be set all 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 wig be accomplished using hand -operated "cyclone -type" seeders or rotary
broadcast equipment attached to construction or revegetation machinery. All machinery wig 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 Project- 2003
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.
3.6 Diskin
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
seedbed materials. To complete the disking operation, the disk will be towed behind an agricultural tractor
at aspeed which minimizes surficial disturbance and optimizes fertilizer incorporation.
3.6 Harrowing
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
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
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.
tr r 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
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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
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S. G. Long - Lagunitas - Redtail Project - 2003
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3.4 Seedbed Material Sampling
General Procedures
mom
dog 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 the 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
iy 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
t }' . compositing for larger acreages is recommended. All sample site locations will be noted on aproject map.
Each sample should be analyzed at aminimum for:
4 - pH,
• texture (field method),
• percent organic matter,
• NH4-N and NO3-N (ppm),
• phosphorus (ppm),
• potassium (ppm),
• electrical conductivity (mmhos/cm),
n • lime estimate, and
'j • sodium adsorption ratio ,d 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.
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S. G. Long - Lagunitas - Redtail Project - 2003
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3.0 TECHNIQUE SPECIFICATIONS
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3.1 General
Areas outside the limits of the site(s) to be revegetated will not be disturbed, excepting those areas
specifically set aside for staging, or as directed_ by the revegetation supervisor. All perimeter erosion
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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
Ci including grading, resoiling, planting, etc. Any erosion control measure damaged, removed prematurely,
or rendered inoperative wig be repaired/replaced as soon as the condition has been discovered.
On slopes accessible to common agricultural machinery, all operations wig be conducted along the
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, all equipment operations will be conducted perpendicular to the prevailing wind
direction.
3.2 Ripping -
Ripping will 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 aspeed that 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 determining
tractor speed.
3.3 Seedbed Material Application
Seedbed material will be applied as soon as possible after grading and/or ripping. Equipment utilized
wig 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 wig be spread to an even depth as per resoiling specifications. The number of
equipment passes over the site wig 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 that 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.
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S. G. Long - Lagunitas - Redtail Project - 2003
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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 until planted. Watering will be repeated, 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,
• avoid excessive heat or cold (out of direct sunlight),
• 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 aprotected area in amanner to prevent them from coming in contact with
incident precipitation or surface water.
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S. G. Long - Lagunitas - Redtail Project - 2003
1.3 Seedlings and Tree Stock
All seedlings accepted will be true to type and name. All seedlings and stock will have well -formed
tops and root systems and be free from injurious insects and plant diseases. Plants will be free from: 1)
serious abrasions to roots, stems, and branches; 2) dried root systems; 3) thin root systems; 4) mold; 5) a
dry, loose. or damaged soil mass; 6) root -bound conditions; 7) broken or malformed containers; and 8)
sun -scald, wind, or freezing damage. Seedlings cut back from larger sizes to meet specified sizes will not
be accepted. All stock will be "hardened off" prior to shipment so that stock is physiologically prepared for
out -planting.
1.4 Native Hay or Straw Mulch
Mulch will not be musty, moldy, caked, _or decayed and shall be free of noxious weeds or noxious
weed seeds. it will be delivered in an air-dry condition. The majority of stems should be 10 to 12 inches
long or longer prior to application H the mulch is to be anchored by crimping. When the mulch is to be
anchored by netting or achemical tack'rfier,.amajority of stems should be at least 6 inches long.
1.5 Wood Fiber Mulch (Hvdromulch)
Wood fiber mulch will be anatural, short fiber product, produced from clean, whole wood chips. The
material should disperse readily in water to form a homogeneous slung. The fiber, dye, and any tackifying
agent to be used will be non -toxic to plant and animal species. The pH of the fiber material will be greater
than 3.5. The mulch will be capable of remaining in uniform suspension in water under agitation. The
mulch will be delivered to the site in standard manufacturer's packaging.
1.6 Erosion Control Matting
Matting will be composed of a blanket of interlocking curled wool fibers overlain with polypropylene
plastic netting as an integral component of the mat. The matting will be of uniform thickness with curled
wood fibers spread evenly over the mat. Matting components will be non -toxic to vegetation and the
blanket will be smolder resistant. The matting will not be moldy or decayed. Matting will be delivered in
standard manufacturer's packaging.
1.7 Plastic Netting and Staples
Plastic netting will be composed of black or green polypropylene or other approved plastic that is
extruded to form a net. The netting will be furnished in rolls and show Tittle or no shrinkage after
application. Staples will be U-shaped and be made of 11 or 12 gage steel wire. Staple lengths should be
6 to 8 inches for firm soils and not less than 12 inches for loose soils.
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S. G. Long - Lagunitas - Redtail Project - 2003
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REVEGETATION TECHNICAL SPECIFICATIONS
MATERIALS, METHODS, AND TECHNIQUES
The following specifications have been prepared for Lagunitas Companies to aid in implementing the
revegetation plans prepared for this project These specifications maybe used as a reference to develop
formal bid packages should Lagunitas prefer to contact 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
r' 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 at 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.
jj 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
rior to shipping. All legume seed will be planted nor to the expiration date on the inoculum to or
P PP 9• 9 P P� P 9
reinoculated within 24 hours prior to planting -
S. G. Long - Lagunitas - Redtail Project - 2003 "
yr ,
11 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 Wood Fiber Mulch(Hydromulch)..............................................................................................2
1.6 Erosion Control Matting..........................................................................................................2
1.7 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....................................................................................................
3.5 Disking..................................................................................................................................66
3.6 Harrowing..............................................................................................................................
3.7 Broadcast Fertilization.............................................................................................................6
3.8 Drill Seeding..........................................................................................................................7
3.9 Broadcast Seeding.................................................................................................................
3.10 Hydroseeding......................................................................................................................8
3.11 Hand Raking........................................................................................................................8
3.12 Seedling Planting.................................................................................................................8
3.13 Willow Collection and Planting..............................................................................:................9
,..- 3.14 Planting. Emergents (Schoenoplectus, Etc.)..........................................................................9
3.15 Tree Planting ............. :.................................................................. .......................................
9
- 3.16 Native Hay or Straw Mulching................................................................................................9
3.17 Hydromulching...................................................................................................................10
3.18 Native Hay or Straw Mulch Netting........................................................................................10
:.. 3.19 Native Hay or Straw Mulch Crimping.....................................................................................1
1
3.20 Erosion Control Matting.....................:................................................................................
11
4.0 Partial List of Planting Material Suppliers. ................................................................................... 12
4.1 Seeds.................................................................................................................................1
4.2 Seedlings/Emergents..........................................................................................................13
4.3 Willow Cuttings.....................................................................................................................13
S. G. Long - Lagunitas - Redtail Project - 2003
REVEGETATION TECHNICAL SPECIFICATIONS
MATERIALS, METHODS, AND TECHNIQUES
Prepared for:
Lagunitas Companies
Fort Collins, Colorado
Prepared by:
Q,3DAR C114= k00GCRA'T30, INC.
Fort Collins, Colorado
February 2003
I
APPENDIX: REVEGETATION TECHNICAL SPECIFICATIONS
first annual report. As appropriate, recommendations will be made with respect to the continued
r maintenance and monitoring of the mitigation area.
Monitoring will continue on an annual basis until the COE judges this mitigation program to be
successful. Disturbed areas revegetated to upland conditions will not be included in the annual
monitoring assessments.
14
r� 7.0 MONITORING
i�
At the end of the first full growing season, the mitigation site will be monitored qualitatively to
determine the overall level of construction success, site stability, and vegetation establishment. The
results of this qualitative assessment will be submitted to the COE in a report on or about December
31. A project location map, site construction drawings and/or maps, and photographs of the
mitigation site taken to document the overall progress of the area will be included with the first annual
r qualitative report. Any actions deemed necessary to enhance mitigation success and/or site stability
4 _! will be taken as a result of this monitoring activity.
At the end of the second and third growing seasons, a quantitative assessment of the mitigation
site will be completed. Mitigation and revegetation success will be judged based on three criteria.
These criteria include the size of the mitigation area successfully established, the soil moisture regime
created, and the percent ground cover of wetland -classed species.
The mitigation size criterion will be met if the area of the mitigation site qualifying as vegetated
wetlands and open water (Waters of the U. S.) are 0.30 and 0.18 acres, respectively. The soil
moisture regime criteria will be met if the mitigation area surface, following excavation and resoiling,
exhibits saturated conditions and/or shallow flooding through the majority of the growing season as
evidenced either by soil characteristics extant or the presence of sufficient wetland indicator species.
Small ridges and potholes that enhance species diversity will be acceptable so long as these features
do not compromise the overall integrity of the wetlands established.
The ground cover criterion will be met if, after three growing seasons, the total ground cover
contributed by all grass, fort, and shrub species present is equal to or greater than 70 percent, on
average, and wetland -classed species (FAC, FACW, and OBL) are dominant on site as compared to
upland -classed (FACU and UPL) species. In addition, there will be no evidence of erosion
detrimental to vegetation establishment or site stability. The percent of open water occurring over the
surface of the mitigation basin will be considered a °null set° when calculating percent herbaceous
ground cover, so long as such surface water does not indicate the formation of an 'open water"
system.
U Specific vegetation sampling and analysis protocols will be developed prior to the first annual
quantitative assessment. Information and showings to be submitted with each annual quantitative
monitoring report include a project location map, a discussion of the condition of the mitigation site, a
summary of the data collected, a list of all species observed within the mitigation area, copies of all
�:,' data sheets completed in the field, and a continuation of the photographic record submitted with the
' 6.0 MANAGEMENT AND MAINTENANCE
No earth -moving activities will be permitted outside the boundaries of the mitigation area except
as provided for in the site development plans. Adjunct disturbances related to the installation of
emergency erosion control or site stabilization measures will also be excepted.
All erosion control measures will be kept in good condition until the mitigation plan is deemed
acceptable by the COE 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/repaired.
The permanent mitigation plantings will be inspected at least bi-monthly during the first three
growing seasons following planting. Areas of poor "seed take" will be noted. Any area remaining
unvegetated by desirable species at the end of each of the first three growing seasons will be
reseeded following the application of seedbed preparation techniques during the next Fall planting
season. Where willow cutting plantings fall below a 75 percent success rate, additional cuttings will
1
be planted to achieve this desired rate. When tallying cuttings, all cuttings present, including
volunteer shoots, will be included.
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.
M
No mowing, trimming, or other similar vegetation modification activities will be permitted in the
wetland mitigation areas unless directly associated with a planned weed control program.
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TABLE 4
FALL MITIGATION 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
Willow Cutting and Planting (following year) XX
TABLE 5
SPRING MITIGATION SCHEDULE
Reclamation Technique
Excavation/Grading
Resoiling and/or Ripping (if necessary)
Seedbed Material Sampling
Fertilization
Seedbed Preparation
lMulching
Willow Cutting and Planting
Month
F M A M J J A S
Any month
XXX
XXX
XX
XX
XX
XX
X(cut)X(plant)
Note: Weather and surface conditions permimng, the earner in me season spring piannng is
completed the higher the potential for revegetation success.
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5.0 REVEGETATION SCHEDULES
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 to be followed to achieve the mitigation objectives
set for this project. Site conditions and/or climatic variations may require that these schedules be
modified somewhat to achieve revegetation success. The schedules do not reflect any weed control
r, activities which may be employed on site and would be amended to incorporate such a program if it is
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required.
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4.0 WEED CONTROL PLAN SUMMARY
This section summarizes the elements of the weed control plan to be prepared for the mitigation
site following the first growing season if weeds are deemed to be detrimental to the success of
mitigation. The completed plan will be submitted to governmental agencies as required for review
and approval.
The weed control plan will be prepared by a Licensed Commercial Pesticide Applicator (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 include mechanical,
chemical, cultural, and biological techniques. Prior to plan preparation, a visit to the project area will
be conducted by the LCPA to assess site conditions, routes of access, weedy species present, the -
relationship surrounding water bodies to the proposed areas to be treated, potential sources of run-on
and run-off, and any other factors relevant to the weed control planning process. Given the presence
of wetlands and Waters of the U. S. in the project area, initial emphasis will be given to weed control
methods other than those of a chemical nature.
Plant species to be considered as weeds and controlled are defined as "noxious weeds" by
Larimer County. These species are Canada thistle (Cirsium arvense), Dalmation toadflax (Linda
genistifolia), Diffuse knapweed (Centaurea diffusa), leafy spurge (Euphorbia escula), musk thistle
(Carduus nutans), Russian knapweed (Acropblon repens), spotted knapweed (Centaurea maculosa),
yellow toadf lax (Linda vulgaris).
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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. Access to treated sites will be prohibited until
vegetation has become adequately established.
• 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
is soil covering will be acceptable. Following seeding, the treated site will be mulched and the.
mulch anchored by applicable means. Access to treated sites will be prohibited until
vegetation has become adequately established. This alternative may be combined with
supplemental fertilization as necessary. The native seed mixture to be used is depicted in
Table 1: Stockpile and Adjunct Disturbance Planting Mixture.
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TABLE 2: NATIVE WETLAND SEED MIXTURE
Species
Alkali sacaton (FAC)
Sporobolus airoides
Switchgrass (FAC)
Panicum virgatum
Baltic rush (OBL)
Juncus baldcus
Nebraska sedge (OBL)
Carex nebrascensis
Olney's bulrush (OBL)
Schoenoplectus americans
Soft -stem bulrush (OBL)
Schoenoplectus tabenaemontani
Preferred
Varieties
NA
Grenville
NA
NA
NA
NA
Rate LbsJAcre
Planted(Broadca.
1.00
2.00
0.50
1.00
3.00
1.00
Totals = 8.5
PLS
Seeded/Acre
1,750,000
778,000
1,500,000
534,000
539,400
550.000
5,651,400
30 seeds/ sq. ft.)
Note: Wetland species seed sources should be identified as soon as possible and supplies secured
well in advance of seeding due to commercial availability concerns.
7
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2.2 Revegetation
Following soil redistribution and surface preparation, the disturbed area will be left in a
roughened condition. Soil samples will then be taken for laboratory analysis. The resoiled surface
will be raked or otherwise roughened and fertilizer (excepting nitrogen) broadcast at rates specified as
a result of soil tests. The seedbed will be raked a second time to incorporate the fertilizer into the
applied soil and prepare the area for seeding. (Fertilizer will be applied in a split application to
decrease the potential for weed invasion and algae formation during seedling establishment.)
Following raking, the seed mixture shown in Table 2. Native Wetland Seed Mixture will be
broadcast over the seedbed and the seedbed lightly raked a third time to shallowly cover the seed.
Mulching is not considered necessary due to the presumed saturated nature of the growth medium. It
can also be noted that there are no planned continuous "flows" over the surface of the mitigation
areas which could wash the seedbed and disrupt planting efforts.
A total of 540 willow cuttings will then be planted. Planting will occur across the surface of each
mitigation area on approximate 5.0 X 5.0 foot centers. Were feeder ditches have been constructed,
plantings will occur along the borders of the feeder ditches at five-foot intervals to maximize the
potential for success. This technique is seen as an adjunct method of establishing willows
supplemental to the technique of resoiling/sprigging noted above.
In the spring of the second growing season, the recommended amount of nitrogen fertilizer will
be broadcast over the seedbed if a nutrient -nitrogen deficiency is apparent.
TABLE 1: STOCKPILE AND ADJUNCT DISTURBANCE PLANTING MIXTURE
Preferred
Rate LbsJAcre
PLS
Species
Variety(s)
Planted (Broadcast)
Seeded/Acre
Green needlegrass
l.odorm
4.00
724,000
Stipa viridu/a
(
Slender wheatgrass
Primar, Revenue
4.00
640,000
F-�
E/ymus trachycau/as
Thickspike wheatgrass
Critana
6.00
1,116,000
E/ymus lanceo/atus
'
Western wheatgrass
Arriba, Barton
QQ
1,134,000
Pascopyrum smithii
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Totals = 23.00
3,614,000
(-83 seeds/ sq. ft.)
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While groundwater may come to play a part in above average precipitation years, it is assumed that
surface water will be the main wetland support source. WM-2 will be constructed using the same
techniques as for WM-1 with regard to staking, depth of excavation, backgrade slope percentage, fine
grading, soil replacement, and planting. No post -grading ripping of the subgrade will be completed if
it is apparent that groundwater will not be a contributory hydrologic factor. If it appears that a
groundwater source may exist to help support this wetland, ripping/disking will be conducted, where
advisable. If necessary, spreader ditches connected to the detention pond will be constructed prior to
planting on 10.0-foot centers and tun the length and width of this basin. The ditches will be
I approximately 1.0 foot deep, the width of a backhoe bucket, and will maintain the 1.0 to 2.0 percent
backgrade established for the basin as a whole. The dike will be removed following planting to permit
flows from the pond to enter the mitigation basin.
2.1.4 Soil Redistribution
With the excavated surface prepared, stockpiled wetland soils will be spread over the wetland
basins to an average depth of 12.0 inches. A variable replacement depth of from 9.0 to 15.0 inches
will be permitted reflecting equipment limitations so long as an average depth of 12.0 inches is
achieved. Soil will be applied on areas to be revegetated when hydrologic conditions in the basins do
not unduly hinder equipment operations.
� 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 a single lift to minimize equipment passes over the
resoiled area. Ideally, soil will be applied on areas to be revegetated within 30 days prior to seeding.
The resoiled surface will be rough graded to remove higher surface undulations which would
promote the formation of upland vegetation plant communities. Low, narrow ridges and small,
shallow potholes can be left over the graded surface to encourage a diversity of soil moisture regime
conditions conducive to maximizing wetland species diversity. As with basin subgrade preparation, a
smooth, compacted surface typical of upland construction grading is not desirable from a reapplied
soil stability and vegetation establishment perspective. All soil grading will be completed
perpendicular to overland flow direction, where safety conditions permit, to minimize erosion and
maximize site stability. The graded surface will be chiseled or disked H the potential for subsequent
erosion from overland flow would compromise revegetation success. .
5
2.1.3 Excavation and Grading
Following site excavation and preliminary grading, the two wetland mitigation areas will be
constructed. The construction objective for each of the mitigation areas is to create a saturated, but
not flooded, soil moisture regime that will support the target wetland plant species. To this end,
grading and soil replacement activities will concentrate on creating basin surface elevations
conducive to this soil moisture regime condition. The following paragraphs summarize the
construction activities that will take place to construct the two mitigation basins. The map included at
the end of this mitigation plan supports the text and depict the locations of the basins to be
constructed.
Wetland Mitigation Area 1 (WM-1) is located immediately adjacent to, and west of, the middle
detention pond. Subsurface excavations completed in June 2003 indicated that saturated soils
incorporating a high gravel content occur at a depth of approximately 38 inches. It was therefore
assumed that this hydrologic source, coupled with overflows from the adjacent detention pond, would
be sufficient to support a wetland mitigation site. The boundaries of this wetland basin site will be
staked in the field to ensure that the correct mitigation acreage is constructed. The site will then be
excavated to a depth 1.0 foot below the normal water surface of the adjacent detention pond leaving
a dike (berm) between the pond and basin to maintain dry working conditions. The basin will be
14 backsloped at a grade of approximately 1.0 to 2.0 percent to enhance the potential for water
spreading across the basin surface. Since groundwater will be an important component supporting
Ir wetland WM-1, this wetland basin will be ripped or disked to relieve any post-excavation/grading
Q compaction and improve the upward movement of groundwater with respect to seedbed growing
1 conditions. (Ripping/disking can be eliminated from the construction sequence if compaction is
deemed to be of no consequence to plant establishment and growth.) Fine grading will be limited to
removing all ridges, depressions, and surface features that would inhibit subsequent resoiling
activities. A rough surface which will promote soil "bonding" with the underlying subgrade should
remain following fine grading. A smooth, compacted surface typical of upland construction grading is
not desirable from a reapplied soil stability and vegetation establishment perspective. Soil will then
be respread to a depth of 1.0 foot, maintaining the 1:0 to 2.0 percent backgrade, using the techniques
described in the following sub -section. Following the completion of planting activities, the dike will be
removed and water allowed to flow from the pond into the basin.
Wetland Mitigation Area 2 (WM-2) takes essentially the same form, and will function in like
manner, as WM-1 with one notable exception. The June 2002 site evaluation provided no evidence
of a groundwater source at an elevation which would help support this proposed wetland basin.
4
2.0 WETLAND MITIGATION SPECIFICATIONS
2.1 Soil Handling and Grading
2.1.1 Soil Salvage and Stockpiling
Prior to construction and soil salvage, the area encompassing the wetlands of the southern -most
delineated wetland will be prepared for soil salvage operations. Willows cuttings will be taken from
the area as needed for future planting activities and stored (see Appendix: Revegetation Technical
Specifications). A brush hog or similar piece of equipment will cut down the remaining willow stand
established in this area leaving the chopped vegetation material on site. Known as "sprigging", this
technique has been used as an efficient means of establishing successful willow stands via soil
reapplication.
The soil overlying this wetland area will then be stripped to a depth of 15.0 inches. A variable
stripping depth of from 12.0 to 18.0 inches is assumed due to equipment limitations. Following
salvage, the soil will be taken to a stockpile reserved for wetland soil materials. The soil stockpile will
be protected from operational disturbances to maintain material integrity. The stockpile will be
surrounded by a slit fence. All stockpiles will be located outside the limits of delineated wetlands and
other Waters of the U.S., which will remain undisturbed.
2.1.2 Soil Stockpile Stabilization
The wetland soil stockpiled will be vegetatively stabilized during the first appropriate planting
season following construction if the stockpiles will exist through one or more growing seasons. The
surface of the stockpiles 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 stockpile will then be mulched using straw
and the mulch anchored to complete the stabilization process. Hydromulch, applied at the
appropriate rates, can be used in lieu of straw. The seed mixture to be used is depicted in Table is
Stockpile and Adjunct Disturbance Planting Mixture.
3
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respectively. The proposed monitoring plan is summarized in Section 7.0. An appendix follows
r. presenting revegetation technical specifications. A map depicting the location of the wetlands to be
impacted and the selected mitigation sites follows the appendix.
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1.0 INTRODUCTION
The following mitigation plan was prepared to accompany the application for a U. S. Army Corps
of Engineers Nationwide.- 39 permit for Lagunitas Companies' Redtail P. U. D. project. The project
area consists of approximately 11.4 acres of undeveloped land within the city limits of Fort Collins,
Colorado. The property is bordered on the west by the Colorado and Southern Railroad line, on the
east by the Cameron Park First Filing and Fossil Creek Office Park Phase I development areas, and
on the south by an existing fence -line and City of Fort Collins Redtail Grove Natural Area. The
northern property boundary joins the Mill Brothers Landscape and Nursery property, now abandoned.
The property is located in the East 1/2 of Section 2 (T. 6 N., R. 69 W.). UTM coordinates (WGS 84
datum) for the approximate center of the wetland drainage along the eastern side of the property are
Zone 13T Easting 493268 Northing 4484935.
A total of 0.49 acres of vegetated wetlands and other Waters of the U. S. are proposed to be
disturbed as a result of this project. Of this total, 0.18 acre consists of a portion of a jurisdictional
pond (other Waters of the U. S.). Vegetated wetlands make up the remaining 0.31 acres of this total,
of which 0.01 acre qualifies as a non -jurisdictional, isolated wetland. Therefore, a total of 0.48 acre of
jurisdictional wetlands and other Waters of the U. S. are proposed to be affected by this project. To
address City of Fort Collins mitigation requirements, the 0.01 acre of non -jurisdictional wetlands will
be included in the acreage to be mitigated.
Compensatory mitigation will be achieved on a 1.0 acre of Waters of the U. S. disturbed : 1.0
acre of Waters of the U. S. constructed basis. All of the re;;:?red mitigation will be completed on site
meeting "in-place/in-kind" project goals. The impact to 0.18 acres of jurisdictional open water in the
upper pond will be mitigated by extending the boundaries of the existing pond to the north a total of
0.18 acres. The vegetated wetland impact of 0.31 acre, including the 0.01 acre of non -jurisdictional
wetlands, will be mitigated by constructing two small wetlands adjacent to the drainage located in the
eastern one-third of the project area. Each of these wetlands will be connected hydrologically to the
existing ponds or the drainage itself. Wetland species selected for planting mimic the range of
species dominating the existing wetlands proposed to be impacted.
The following sections present the wetland mitigation plan prepared for this project. Section 2.0
presents the mitigation/revegetation techniques that will be used to create wetlands on site.
Excavation, grading, seedbed preparation, and seeding techniques are addressed and seed mixtures
listed. Adjunct area stabilization techniques are summarized in Section 3.0. Sections 4.0, 5.0, and
6.0 discuss weed control, revegetation schedules, and management/maintenance activities,
... _ .. - _, ... ....ems-...-... .. .��V4 '..
TABLE OF CONTENTS
Tableof Contents......................................................................................................................................I
1.0 Introduction.............................................................................:...........................................................1
2.0 Wetland Mitigation Specifications.......................................................................................................3
3.0 Adjunct Area Stabilization...................................................................................................................8
4.0 Weed Control Plan Summary ..............................................................................................................9
5.0 Revegetation Schedules...........................................................................................................:........10
6.0 Management and Maintenance.........................................................................................................12
7.0 Monitoring.....................................................................................:....................................................13
Appendix : Revegetation Technical Specifications
Map: Wetlands Impacted and Mitigation Areas
i
WETLAND MITIGATION PLAN
for the
REDTAIL PROJECT
(U. S. Army Corps of Engineers Project File No. 200180455)
Prepared for:
Lagunitas Companies
Fort Collins, Colorado
Prepared by:
CMDAR CMITKIKK ASSOMAM, INC.
FortCollins, Colorado
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February 2003
Revised March 2005
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