HomeMy WebLinkAboutSection 02480 Landscaping
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SECTION 02480 LANDSCAPING
PART 1 - GENERAL
1.01 SCOPE:
A. Summary of Work: The CONTRACTOR shall provide all labor, equipment and
materials for the landscaping with replacements in kind of all landscaping damaged
or destroyed during the execution of the work.
1.02 APPLICABLE PUBLICATIONS:
A. The following Standard Specifications shall apply to the work of this section as
indicated.
1. Florida Department of Agriculture and Consumer Services
a. Grades and Standards for Nursery Plants/Division of Plant Industry, 1998.
2. Florida Nurserymen and Growers Association approved planting practice
3. Florida Department of Transportation
a. Standard Specifications for Road and Bridge Construction (FDOT), latest
edition.
4. American Joint Committee on Horticultural Nomenclature
a. Standardized Plant Names, Species, Etc., 1942 Edition
5. American National Standards Institute (ANSI)
a. A300 guidelines
1.03 DEFINITIONS: (Not Used)
1.04 SUBMITTALS: The CONTRACTOR shall make submittals in accordance with Section
01300 and the following requirements.
A. Submit a written schedule of sources or suppliers of all materials for inspection and
approval by ENGINEER before they are delivered and installed on the project.
B. Copies of the manufacturer’s specifications or analysis for all fertilizer, including data
substantiating that proposed materials comply with specified requirements. Tags
from bags of fertilizer used on the site shall also be provided.
C. Shop drawings for all staking and guying methods to be used if the ones indicated in
the Contract, Plans, Specifications, or other referenced documents are not to be
implemented or there are no details provided.
D. Schedule of spraying, dusting materials or insecticide soaps to be used to control
pests and disease infestation, the reason for their use, and the method to be used to
apply the materials and the method of application before it is delivered and used on
the project. Furnish documentation that the implementation of these control
measures for pests and disease infestation is in strict compliance with all applicable
regulations.
E. When the specified type, grade, quality, size, quantity, etc. of a material is not
available, the CONTRACTOR shall submit a written request to the ENGINEER for a
substitution, along with written, documented proof that the material is not available.
All substitutions considered must be Florida native species appropriate for the
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planting area. Before they are installed, all substitutions shall receive the approval of
the ENGINEER.
1.05 QUALIFICATIONS: The CONTRACTOR shall ensure that personnel handling planting
chemicals are appropriately licensed to do so and that the application of such chemicals is
in compliance with the manufacturer’s printed literature and/or directions on the label.
1.06 RESPONSIBILITIES:
A. The CONTRACTOR shall be responsible for receiving, storing, maintaining (before
and after planting), planting soil, fertilizer, mulch, water, temporary irrigation system,
miscellaneous landscape accessories, bracing, etc.
B. The CONTRACTOR shall provide all plants required to perform the work covered by
this section, including all shrubs and trees.
C. Work Covered By Contract Documents: The CONTRACTOR shall provide all
supervision, labor, materials, equipment and tools, and perform all operations
necessary to excavate, grade, plant, and backfill all landscape material indicated in
the Drawings.
D. The CONTRACTOR shall procure all necessary permits to accomplish all of the
work.
E. The CONTRACTOR is responsible for performing all work in accordance with all
applicable regulations, ordinances, and code requirements from the appropriate city,
county, state and/or federal jurisdiction the project is located in.
1.07 CERTIFICATIONS: Upon request from the City, the CONTRACTOR shall provide
certifications indicating that the plants used in the WORK meet or exceed the existing
landscaping features being replaced. As a minimum, the certifications shall indicate that
the plant complies with the grade, size, and quality of the plant being replaced.
1.08 INSPECTION COORDINATION: The CONTRACTOR shall provide access to the WORK
for the ENGINEER as requested for inspection. The Contractor shall provide 48 hours
notice of its intention to begin new WORK activities.
1.09 WARRANTY: The CONTRACTOR shall warranty plantings and landscaping in
accordance with the following.
A. All plants shall be of the same grade and standard as set forth in the latest revision
of the “Florida Grades & Standards” at the end of the guarantee period as they were
originally specified prior to installation.
B. The guarantee shall not begin until the day final acceptance is given.
C. All landscape elements and plant material, except sod, shall be guaranteed for a
minimum of one calendar year from the time of final acceptance. All sod shall be
guaranteed for a minimum of SIXTY (60) calendar days from the time of final
acceptance.
D. An inspection may be made at the end of the period, but prior to the last day of the
guarantee period.
E. Plant material, which is on site and scheduled to be transplanted or placed into
nursery pots, is not covered by a guarantee except in the case of the
CONTRACTOR’s negligence or work that has been done in an unworkman-like
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manner. If it is determined by the ENGINEER that the CONTRACTOR’s negligence
or unworkman-like operations has severely damaged, or poses a threat to, the health
of material to be transplanted or already transplanted, then the CONTRACTOR shall
be responsible to replace the plant(s) per original Specifications or an equal
replacement.
F. Negligence can be, but is not limited to, the following list of acts by the
CONTRACTOR's:
1. Girding trunk and limbs.
2. Breaking limbs so as to deform tree.
3. Failure to water plants upon initial installation.
4. Allowing trees to dry out during the transplant procedure of after installation
during the required watering period.
5. Providing improper bracing.
6. Excessive pruning beyond that approved by the ENGINEER.
7. Installing plant at improper planting depth.
G. The guarantee shall be null and void for plant material which is damaged or dies as a
result of “Acts of Nature” limited to hail, freeze, lightning, winds that exceed hurricane
force, and lethal yellowing, or any other non-preventable and incurable plant
diseases, providing the plant was in a healthy growing condition prior to these “Acts
of Nature”.
H. If replacement plant material that meets the requirements of size, quality, and grade
cannot be found as a result of freeze or hurricane damage, the CONTRACTOR shall
notify ENGINEER, who will recommend one of the following courses of action:
1. Do not replace the material, or if the plants have not yet been installed, do not
install them. Full credit for plant cost, including installation, based on the
proposal values, will be given to the ENGINEER.
2. Delay installation of the plant material until material that meets the
specifications is available.
3. Accept smaller sizes of the native plant material specified, and negotiate any
fee adjustment prior to installation.
I. The guaranteeing of plant material shall be construed to mean the complete and
immediate replacement of plant material within seven (7) calendar days if it is:
1. Not in a healthy growing condition and thus renders it below the minimum
quality indicated in the Specifications (Florida #1).
2. There is a question as to its ability to survive after the end of the guarantee
period that would render it below the minimum quality indicated in the
Specifications (Florida #1).
3. It is dead.
J. The seven (7) calendar days may be extended due to seasonal conditions,
availability, preparation time such as root pruning, etc., only if approved by the
ENGINEER in advance. The extended time shall be negotiated between all parties
concerned but must receive final approval by the ENGINEER. After the 7-day
replacement period, the CITY may perform the work and charge said
CONTRACTOR in accordance with the General Conditions.
K. Size, Quality and Grade:
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1. Provide replacement of the same species of equal size and quality as the
damaged plant.
2. If an equal-sized plant cannot be found, then other methods of compensation
shall be determined in negotiation with ENGINEER. They may include, but not
be limited to:
3. Replacement with plant(s) of another species of same size as original plant.
4. Replacement with more than one plant to equal the canopy, trunk diameter, or
overall height.
5. Payment in lieu of replacement, with value determined by “replacement” value.
6. Replacements shall be guaranteed for a period equal to the originally specified
guarantee. This guarantee period shall begin at time of acceptable
replacement.
7. The CONTRACTOR shall be responsible for watering the replacement upon
installation and as required for sixty (60) calendar days after planting.
PART 2 - PRODUCTS
2.01 SPECIES: All trees, shrubs and other plants damaged, destroyed or removed during the
execution of the work shall be replaced with the same species, and of equal quality and
size.
2.02 PLANT GRADE: Any supplier of materials misrepresenting the grade or quality of their
materials (i.e., a higher grade than they actually are) as determined by the ENGINEER,
shall not be allowed to supply any material for the project. All material already supplied
and received from such a supplier shall be removed and replaced at the CONTRACTOR’s
sole cost. This requirement for removal and replacement shall also include any installed
materials. No further materials will be accepted from such supplier until written evidence
is submitted and confirmed that all material for delivery is of the grade or quality
represented.
2.03 NOMENCLATURE: The CONTRACTOR shall supply plant material conforming to the
names given in Standardized Plant Names, Species, Etc., 1942 Edition, prepared by the
American Joint Committee on Horticultural Nomenclature. Names of varieties not included
therein shall conform generally with names accepted in the nursery trade.
2.04 GRADE STANDARDS: The CONTRACTOR shall furnish plant material nursery grown
species and shall comply with all required inspections, grading standards and plant
regulations as set forth in the latest edition of the Florida Department of Agriculture and
Consumer Services Division of Plant Industry manual “Grades and Standards for Nursery
Plants” or with any superseding specifications that may be called out on the plans. All
plants not listed in the “Grades and Standards for Nursery Plants” shall conform to Florida
No. 1 as to: (1) health and vitality; (2) condition of foliage; (3) root system; (4) freedom
from pest or mechanical damage; and (5) heavily branched and densely foliated according
to the accepted normal shape of the species.
2.05 The CONTRACTOR shall furnish grass seed as required as specified herein.
A. Provide fresh, clean, new crop seed complying with tolerance for purity and
germination established by Official Seed Analysts of North America and as required
below.
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B. Packaging shall be labeled according to the U.S. Department of Agriculture Federal
Seed Act and shall be furnished in containers with tags showing seed mixture, purity,
germination, weed content, name of seller, and date on which seed was tested.
1. Seed Mixtures: Meet the following minimum percentage requirements for
purity and germination:
Pounds per 100 lbs
Seed Name Purity Germination of mixture
Argentine Bahia 95 80 70
Brown Top Millet 90 85 30
2. Moldy seed or seed that has been damaged in storage will not be accepted.
3. When seasonal conditions mandate, substitute a winter grass such as rye
grass for the brown top millet.
2.06 The CONTRACTOR shall provide sod as shown on the drawings and specified herein.
A. Provide Argentine Bahia grass sod containing a minimum of 95 percent pure from a
certified sod farm that grows its sod on sandy soil.
B. Sod shall be strongly rooted, free of pernicious weeds, mowed to a height of three
inches before lifting, delivered to the site in strips 12 inches wide at least three feet
long, rolled, and a uniform thickness of one and a quarter inch including three
quarters inch thick layer of roots and topsoil.
2.07 PLANTING SOIL:
A. General Type: The CONTRACTOR shall plant all new transplanted plant material
(other than sod) with the general type planting soil, unless otherwise stated. The
planting soil shall be a sandy loam (50 percent sand and 50 percent Everglades
peat), by volume. The soil shall be thoroughly mixed and delivered in a loose, friable
condition. The sand shall be well-washed lawn sand, free of silt and sludge.
“Cyclone” sand is not acceptable. The planting soil pH shall range between 6.5 and
7.2.
B. Soil for Backfilling Root-Pruning Trenches: The CONTRACTOR shall backfill root-
pruning trenches with a soil mixture consisting of by volume of 70 percent planting
soil as described in 2.05A above and 30 percent mulch with 0-0-20 fertilizer added at
a rate of 1/3 pound per cubic yard of soil, thoroughly mixed prior to backfilling.
C. The CONTRACTOR shall submit sample of sand and muck separately and/or soil
analysis (es) if requested and as needed.
2.08 MULCH:
A. The CONTRACTOR shall mulch all new and transplanted plant materials and
associated planting beds (other than sod areas) with mulch at the time of installation,
final acceptance, and at the end of the guarantee period UNLESS OTHERWISE
STATED. The mulch layer shall exceed a depth of two inches within a one-foot
radius of the plant materials or exceed a depth of four inches in areas beyond the
one-foot radius. All mulch material shall be grade “A” Recycled Mulch approved by
the ENGINEER. It shall be uniformly shredded and free from foreign matter, large
pieces of bark, tree stump material, and insects such as burrowing nematodes and
ants. Submit sample of mulch if requested and as needed at no additional cost to
the CITY.
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B. Florimulch: If Florimulch is to be used in the installation, a the CONTRACTOR shall
submit a written statement prior to the installation of the mulch that guaranteeing that
there will not be any germination of melaleuca seed that may be present in the
mulch.
2.09 FERTILIZER:
A. If requested by the ENGINEER, the CONTRACTOR shall submit copies of the
manufacturer’s specifications or analysis of all fertilizer for the ENGINEER’s
approval.
B. Unless otherwise specified on the Plans, the CONTRACTOR shall fertilize new trees,
transplanted trees, palms, shrubs, and ground covers (container) using a complete
granular fertilizer containing not less that 6:6:6 NPK ratio plus minor/trace elements
per manufacturer’s recommendation.
C. The CONTRACTOR shall fertilize existing trees to be transplanted using water-
soluble fertilizer having a 20-20-20 analysis.
D. The CONTRACTOR shall fertilize new grass using a dry granular plant food
containing 21 percent nitrogen, zero percent available phosphoric acid, and zero
percent potash. Where applicable, the CONTRACTOR shall also apply granular, dry
superphosphate fertilizer composed of ammonium phosphate (34-20-0) containing
1.4-percent sulphur.
E. The CONTRACTOR shall furnish fertilizer that is uniform in composition and dry.
Granular fertilizer shall be free flowing and delivered in unopened bags. Tablet
fertilizer shall be delivered in unopened containers or boxes. All bags, containers, or
boxes shall be fully labeled with the manufacturer’s analysis.
F. The CONTRACTOR shall furnish fertilizer complying with the State of Florida
fertilizer laws. The CONTRACTOR shall handle and store fertilizer in compliance
with these specifications and all applicable laws and regulations.
2.10 STAKING AND GUYING MATERIALS:
A. The CONTRACTOR shall furnish wood for staking that is new, #2 grade yellow Pine,
or #2 Cedar, free of knot holes, splinters, or cracks, or recycled pressure treated pine
as approved by the ENGINEER, sized as shown on details or approved ship
drawings.
B. The CONTRACTOR shall furnish wire for guying that is double strand #12 gauge.
C. The CONTRACTOR shall furnish hose material that is a minimum of 25 percent
larger than diameter of attached tree.
2.11 HERBICIDES:
A. The CONTRACTOR shall furnish herbicides to kill existing weeds. Near water
bodies where the chemical could runoff into the water, the CONTRACTOR shall use
a herbicide approved for use on aquatic and emergent plants.
B. The CONTRACTOR shall furnish pre-emergent herbicides based on the type of
weeds present.
C. Herbicide spray application will not be permitted when wind velocity exceeds 10
miles per hour.
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2.12 TREE PROTECTION BARRICADES:
A. The CONTRACTOR shall provide tree protection barricades as required.
2.13 INSPECTIONS:
A. Inspection at the growing site does not preclude the right of rejection at the project
site.
B. The CONTRACTOR shall request inspections in writing at least 48 hours in advance.
C. In the event the ENGINEER has made an early inspection shall not bar the
ENGINEER from subsequently rejecting such work that is discovered to be faulty
work or work omitted or work performed which is not in accordance with the contract
requirements.
D. Die-Back and Leaf-Drop: Plant material showing signs of die-back or leaf-drop will
not be accepted and must be removed from the project immediately if so directed by
the ENGINEER. Any plant material with tendencies toward leaf-drop or die-back
must be root pruned early enough to provide a sound network of hair roots prior to
relocation.
E. Mechanical Destruction of Foliage: Mechanical destruction of foliage resulting from
root pruning shall not affect more than 10 percent of the total foliage prior to planting
on the project. Loss of foliage caused by seasonal change will be accepted.
F. Spanish Moss: If Spanish Moss (Tillandsia useoides) exists on plant material, it shall
be completely removed prior to planting on the project.
G. Palms: The CONTRACTOR shall comply with the following with regards to palms.
1. Before Transporting: See Paragraph 2.13, Delivery, Handling, Storage and
Submittals for requirements related to wrapping of root balls.
2. Prepare Cabbage Palms by pruning in a hurricane cut and remove a maximum
of fronds from the crown without damage or exposure to the central bud to
facilitate transporting and handling.
3. Palms with burn marks and frond boots on trunk will not be accepted unless
noted on Plans.
4. Tying shall be as set forth in the latest edition of the Florida Department of
Consumer Services' manual “Grades and Standards for Nursery Plants”. Tying
of other palms shall be at the option of the CONTRACTOR.
5. To reduce head volume, palm fronds may be taper trimmed by not more than
one-third.
6. Palms showing cable or chain marks and equipment scars shall be rejected.
H. Chlorosis: The allowable level of Chlorosis in foliage shall be set forth in the latest
edition of the Florida Department of Consumer Services' manual, “Grades and
Standards for Nursery Plants”.
I. Plant material shall not be accepted when the ball of earth surrounding its roots has
been cracked, broken, or otherwise damaged.
J. The CONTRACTOR shall, when necessary, perform root pruning of plant material
conforming to guidelines provided by an arborist or certified landscape professional
to ensure the health, stability and longevity of the plant material. Prior to root
pruning, the CONTRACTOR shall give 48 hour advance notice to the ENGINEER
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advising of the date to root prune any plant material. This shall allow for any
inspections during or after the root pruning, if necessary.
2.14 DELIVERY, HANDLING, STORAGE AND SUBMITTALS:
A. Delivery and Handling: The CONTRACTOR shall comply with the following
regarding delivery, handling, and storage of planting materials.
1. Movement of nursery stock shall comply with all Federal, State, and local laws,
regulations, ordinances, codes, etc.
2. The CONTRACTOR shall be responsible for protecting plant material from
adverse environmental conditions including drying and sunburn during all
phases of delivery and storage. Further, the CONTRACTOR shall be
responsible for protecting plant material from any damage, theft, or
deterioration of health or appearance during all phases of delivery and storage.
3. The CONTRACTOR shall wire wrap burlap if root ball is not sufficiently
compacted. Palms will not require burlap wrapping if the following
requirements are met:
a. The Palm is dug from marl or heavy soil that adheres to roots and retains
shape without shattering.
b. Moistened material is used to cover root ball and not exposed to wind or
allowed to dry out.
c. The palm is planted within 24 hours after being dug.
d. Palms are stored in shade and protected from weather.
e. Maintain and protect plant material that will not be planted within four
hours of delivery.
4. Transport materials on vehicles large enough to allow plants not be crowded
and damaged. Plants shall be covered to prevent wind damage during transit.
5. Protect plant material during shipping to prevent damage to the root system
and desiccation of leaves. Trees shall be protected during shipping by tying in
the branches and covering all exposed branches as necessary. Do not bend
or bind-tie plant material in such a manner as to damage bark, break branches,
or alter the natural shape.
6. The CONTRACTOR shall exercise care in handling, loading, unloading,
storing, and transporting all material to prevent damage. The CONTRACTOR
shall assume full responsibility for protection and safekeeping of materials.
2.15 DAMAGE TO EXISTING VEGETATION AND/OR IRRIGATION:
A. The CONTRACTOR shall exercise caution when working in the vicinity of existing
vegetation and/or irrigation system components to prevent damage caused by the
use of tools or equipment (mechanical), chemicals, grade changes, and excavation.
B. If the CONTRACTOR damages existing plants and/or vegetation due to his own
negligence, he shall be responsible to replace them at his cost, within seven
calendar days.
C. If tree damage results when the CONTRACTOR employed the appropriate
preventive measures, those damages may, at the discretion of the ENGINEER, be
rectified by pruning in conformance with the “American National Standards Institute
(ANSI) A300 guidelines” or as directed by the ENGINEER.
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PART 3 - EXECUTION
3.01 The CONTRACTOR shall keep areas free of all trash, debris, loose and excess material,
unsecured equipment or tools, etc., which may be subject to theft or vandalism, or which
may create a passive or active danger to the safety of the public or an unnecessary
eyesore.
3.02 The CONTRACTOR shall carefully inspect all plants delivered to the site to verify that they
meet the requirements of the Contract as to grading, condition, size, and species. The
CONTRACTOR shall reject all plants that do not comply with the requirements.
3.03 PREPARATION OF SITE PRIOR TO PLANTING: Before any disturbance of the actual
planting areas is performed, the CONTRACTOR and the ENGINEER shall conduct an
inspection and evaluation of these sites. Most of the planting areas are sodded to prevent
soil erosion on the steep slopes. The CONTRACTOR shall remove a circular area of sod
three to four feet in diameter for trees and field-grown shrubs; and two feet in diameter for
three-gallon material. All sod shall be removed completely from the area and immediately
disposed of off-site.
3.04 TREE AND PLANTS PLANTING PITS: The CONTRACTOR shall prepare planting pits as
follows.
A. Planting pits shall be excavated to the dimensions required to comply with the
requirements for soil amendments and to include the following:
1. For balled and burlapped trees and shrubs, excavations shall be 24 inches
larger in diameter than the root ball.
2. For container grown stock, excavate as specified for balled and burlapped
stock, adjusted to comply with same diameter dimensions. For three gallon
containerized plants, excavate with a hole 12 inches larger in diameter. For
one gallon containerized plants, excavate with a hole three inches larger in
diameter.
3. Stabilize excavations for trees and shrubs with water and allow to percolate out
before planting.
3.05 TREE AND PLANTS PLANTING: The CONTRACTOR shall plant trees and plants in
accordance with industry standards and as follows.
A. Set balled and burlapped stock on a six-inch (minimum thickness) layer of
compacted planting soil mixture, plumb and in center of pit, with top of ball at same
elevation as adjacent finished landscape grades. Remove burlap from sides of balls;
retain on bottoms. Set plants in pits at such level that after settlement they bear the
same relationship to the finished grade of the surrounding ground as they did in their
natural state. Proper turning of all plants to take advantage of the best and most
natural growth appearance will be practiced at all times and will be subject to the
approval of ENGINEER. Place backfill around base and sides of ball and work each
layer to settle backfill and eliminate voids and air pockets. When excavation is
approximately one half full, water thoroughly. Repeat watering until no more is
absorbed. Water again after placing final layer of backfill. Flush amended soil
mixture into place with a slow full hose stream eliminating all air pockets and fill pit to
form a broad saucer to surrounding grade.
B. Set container grown stock as specified for balled and burlapped stock.
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C. Provide additional backfill berm around edge of excavations to form a shallow
planting saucer to contain water with a minimum of three to five inch berm.
D. Mulch planting saucer and the areas as indicated herein with two to four inches of
mulch.
3.06 STAKING AND GUYING: The CONTRACTOR shall stake and guy trees and plants as
follows.
A. Palm trees are to be staked with three 2-inch by 4-inch wood braces, toe nailed to
cleats, which are securely banded by two points to the palm at one half the height of
the trunk. The trunk shall be padded with five layers of burlap under the cleats.
Braces shall be approximately 120 degrees apart and secured underground by two-
inch by four inch by 12-inch stale pads.
B. Trees larger than one inch caliper and smaller than two inch caliper shall be staked
with a two inch stake set at least 24 inches in the ground and extending to the crown
of the plant. The plant shall be firmly fastened to the stake with two strands of 12-
gauge soft wire, enclosed in a rubber hose or other approved covering. The wire
shall be nailed or stapled to the stake to prevent slippage.
C. Trees larger than two-inch caliper and smaller than three and one-half inch caliper
shall be staked with two two-inch by four-inch stakes, eight feet long, set two feet in
the ground. The tree shall be midway between the stakes and held firmly in place by
two strands of 12-gauge wire, applied as specified above for single stakes. Tie wires
will be tightened and kept tight by twisting.
D. Understory plants do not need staking.
E. Nails or spikes in trunks are prohibited
3.07 PRUNING AND REPAIR: The CONTRACTOR shall limit pruning to the minimum
necessary to remove dead or injured twigs and branches. The CONTRACTOR shall
prune so as not to change the natural habit or shape of the plant, not shall the
CONTRACTOR prune any plant back to such an extent that it no longer meets
specifications.
3.08 GRASSING GENERAL: The CONTRACTOR shall establish a stand of grass on slopes,
shoulders, and other areas shown on the Drawings by seeding, fertilizing, mulching and
maintaining the area as specified herein. Fertilizing, seeding or mulching operations will
not be permitted when wind velocities exceed 15 miles per hour. Seed shall be sown only
when the soil is moist and in proper condition to induce growth. Grassing shall be
incorporated into the project at the earliest practical time in the life of the Contract.
3.09 GRASSING SEQUENCE OF OPERATIONS: The CONTRACTOR shall proceed with the
WORK in the following sequence: fertilization and preparation of the ground, spreading of
mulch, seeding, cutting-in mulch and rolling.
3.10 SOD DELIVERY: The CONTRACTOR shall follow the following requirements regarding
delivery of sod.
A. Deliver sod immediately on lifting and after grass bed is prepared for planting.
B. Give advance notice to ENGINEER on days on which deliveries of sod will be made
C. The CONTRACTOR shall protect sod from drying by covering during delivery to
protect from sun and wind.
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3.11 SOD STORAGE: The CONTRACTOR shall store sod to protect is from damage and
drying and in accordance with the following.
A. Store materials only in areas of site designated by the ENGINEER.
B. If sod is not laid within two days of delivery, spread out flat with grass side up in cool
place and keep moist. Rolled or stacked sod that becomes yellow shall be removed
from the site and replaced by the CONTRACTOR at its own cost.
3.12 GRASSING INSTALLATION: The CONTRACTOR shall follow the following guidelines in
preparing the seed/sod bed and in placing seed and sod.
A. Preparation of Subgrade: After rough grading is completed and before topsoil is
spread, apply superphosphate, and thoroughly scarify ground to a minimum depth of
eight inches with a toothed ripping machine by running in two directions at right
angles over the entire surface area to be planted.
B. Fertilizing:
1. Apply commercial fertilizer at the rate of 15 pounds per 1,000 square feet
distributing uniformly with a mechanical spreader.
C. Finish Grading:
1. Thoroughly mix the applied materials to a depth of six inches by running a
rototiller over the entire area in two directions at right angles.
2. Rake the top soiled area to a uniform grade so that all areas drain, as indicated
on the grading plan.
3. Remove all trash and stones exceeding two inches in diameter from area to a
depth of two inches prior to preparation and planting.
D. Seeding:
1. Time of Seeding: Conduct seeding under favorable weather conditions during
seeding seasons which are normal for such work as determined by accepted
practice in locality of project.
2. Mechanical Seeding: Sow grassed areas evenly with a mechanical spreader
at rate of 100 pounds per acre, roll with cultipacker to cover seed, and water
with fine spray. Method of seeding may be varied at discretion of
CONTRACTOR on his own responsibility to establish a smooth, uniformly
grassed area.
3. Temporary Seed: Apply temporary seed at a rate of 30 pounds per acre to all
areas where permanent seed is placed.
4. Mulching and Protection: Mulch all seeded areas by spreading a uniform light
cover of straw mulch over the seeded area at a rate of 2-1/2 tons per acre not
later than 2 days after seeding has been performed.
E. Sodding:
1. Before sod is laid, correct soft spots and grade the area smooth and remove
sticks, rocks and debris greater than three quarters inch in diameter. Lay so
that no voids occur and tamp or roll, brush or rake screened topsoil with no
lumps or stones larger than three quarters inch over sodded area, water sod
thoroughly. Complete sod surface true to finished grade, even and firm.
Fasten sod on slopes steeper than 1:2 by wooden pins 6 inches long driven
through sod into soil, until flush with top of sod. Install at sufficient intervals to
hold sod in place when saturated.
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3.13 GRASS MAINTENANCE: The CONTRACTOR shall comply with the following
maintenance guidelines for seeded and sodded areas.
A. Maintenance Period: Begin maintenance immediately after each portion of grass is
planted and continue for eight weeks after all grass planting is completed.
B. Maintenance Operations: Water to keep surface soil and germinated grass moist.
Repair washed out areas by filling with topsoil, liming, fertilizing and seeding.
Replace mulch on banks when washed or blown away. Weed by local spot
application of selective herbicide only after first planting season when grass is
established.
C. Fertilization: On areas that have been seeded, apply 30lb N per acre as soon as
grass seedlings have emerged; apply an additional 50 lb N per acre 50 days later.
On areas that have been sodded, apply 30 lb N per acre two weeks after sodding;
apply an additional 50 lb N per acre one to two months after the first application.
3.14 GRASSING INSPECTION FOR ACCEPTANCE: Eight weeks after the start of
maintenance on the last section of completed grass and on written notice from the
CONTRACTOR, the ENGINEER will, within 15 days of such written notice, make an
inspection to determine if a satisfactory stand has been produced. If a satisfactory stand
has not been established, another inspection will be made after written notice from the
CONTRACTOR that the grass is ready for inspection following the next growing season. A
satisfactory stand is defined as a grass or section of grass that has:
A. No bare spots larger than six inches in diameter.
B. Not more than five percent of total area with bare spots larger than three inches in
diameter.
C. Not more than ten percent of total area with bare spots larger than two inches in
diameter
END OF SECTION