- 707 - SECTION 825 -- FURNISHING AND PLANTING OF PLANT MATERIALS
825.01 Description
1.This work shall consist of furnishing, collecting, packaging, delivering, and planting the "plant materials."
2.Plant material shall mean trees, shrubs, vines, ground covers, and plants of all descriptions.
3.Hortus Third , compiled and published by the staff of the L. H. Bailey Hortorium, Cornell University, shal l be the Department's reference for species nomenclature.
825.02 Material Requirements
1.Planting Seasons a. A minimum of 90 days before each planting season, the Contractor shall submit to the Department:
1.A copy of confirmed nursery purchase orders. (2) A list showing each plant and where it was grown.
b.All plant material shall have been grown within the boundaries shown on the plant hardiness zone map in the special provisions.
c.Plant material from unapproved sources will be rejected. d. (1) Planting is restricted to the following:
i.Spring, Conifer ous -- March 15 to May 1. (ii) Spring, Decidu ous -- March 15 to May 15. (iii) Fall, Coniferous -- August 15 to September 30. (iv) Fall, Balled and Burlapped or container grown Deciduous -- August 15 to December 1.
2.Planting within these s easons is further restricted by weather, soil conditions, and accepted local practices.
2.All plant materials shall be grown in a State inspected nursery unless specified otherwise (i.e., collected plant materials).
3.The contract may allow or r equire the use of "Collected Plant Materials". Collected plant material is non-nursery-grown plant material, including coniferous plant material grown for Christmas trees, which has not received the normal transplanting and root pruning given nursery-grown plant material.
4.All Contractor provided plant materials shall conform to the appearance and physical properties standard described in the American Standard for Nursery Stock published by the American Association of Nurserymen, Inc.
5.a. All plants shall be labeled.
b.The information on each plant's label shall describe the plant's: (1) Botanical genus. (2) Species. (3) Common name.
825.02 Furnishing and Planting of Plant Materials
- 708 - (4) Size or age.
c.Legible labels shall be attached by the nursery grower to individual plants, boxes, bundles, bales, or other containers to insure that all species and varieties are identified.
d.Plant materials which are delivered and/or planted and are not the species shown on the plant label shall be removed and replaced at no additional cost to the Department.
6.a. All plant material shall be sound, healthy specimens of their species or variety and shall have well- formed tops and healthy root systems.
b.(1) Plant materials which lack proper proportions, have serious injuries to the bark or r oots, broken branches, objectionable disfigurements, shriveled dry roots, br oken root balls, insect pests, diseases, or which are not found to comply with these Specifications will be rejected.
2.Rejected plant material shall be removed from the project as soon as practical. Diseased or insect infested plant material shall be removed within 24 hours of notification or identification.
c.Bud-break for the birch, redbud, hackberry, oaks, and hawthorns must occur before they are planted.
7.All plant materials are subject to an internal and/or an external examination at any time to ascertain the condition of the roots and the soil around the roots.
8.a. If a Contractor is unable to lo cate sufficient plant material in the specified sizes, the Department may elect to negotiate for a unit price reduction or increase.
b.Price negotiations shall be concluded before ordering plant materials.
9.Plant material held in storage will be rejected if excessive growth or other detrimental effects have occurred.
10.a. Unnecessary injury to or removal of fibrous roots from the plant material is cause for rejection of the plant material. The soil for balled, container-grown, or pot-grown material shall be in such condition so as to insure no crumbling or cracking. Balls shall be wrapped with burlap before removal from the ground. The burlap shall be held in place with cord and/or pinning nails. Handling of balled and burlapped material shall be done in such a manner as to keep the earth intact. Plant material on which earthen balls do not hold together or which cr ack in handling causing the plant to be loose in the ball will be rejected.
b.Plant material that is orde red "tree spaded" shall be delivered in burlap lined wire baskets, unless otherwise specified.
11.a. Planting fertilizer shall be pressure formed pellets and have a 20-10-5 (20% nitrogen, 10% phosphorous , and 5% potash) analysis with a mass of 21 g ± 1 g per pellet; or the pellets may have a 14-3-3 (14% nitrogen, 3% phosphorous, and 3% potash) analysis with a mass of 16 g ± 1 g per pellet. Either pellet shall contain a minimum of 11.5% water insoluble nitrogen.
b.Establishment period fertilizer shall be liquid urea with 28 to 32% nitrogen or an approved equal. Furnishing and Planting of Plant Materials 825.03 - 709 - 12. a. All mulch shall be approved by the Department.
b.The wood mulch shall be either chips, shreds, or shavings. The wood mulch shall not have been subjected to conditions that would cause it to lose its value as mulch. The mulch shall be reasonably free from sawdust and other foreign materials and shall be free of toxic substances.
13.Stakes shall be wood, approximat ely 1 1/2 inch x 1 1/2 inch x 6 feet (38 mm x 38 mm x 1.8 m) for all trees less than 2 inches (50 mm) in trunk caliper and coniferous trees less than 8 feet (2.4 m) in height.
14.a. The guying material shall be a combination of hose and wire, or commercial plant ties approved by the Engineer. The minimum size of wire used for guying shall be 14 gage (1.9 mm) soft drawn. The hose shall be nylon, rubber, or reinforced plastic and shall have an inside diameter of at least one-half inch (12.5 mm), and a mi nimum length of six inches (150 mm).
b.The Contractor shall send a sample to the Department for approval.
15.a. The absorbent polymer sh all be an organic cross-linked co- polymer in a powder form regularly manufactured for agricultural or horticultural uses.
b.When mixed with water, it shall produce a gel that will adhere to and coat plant roots when they are dipped in the solution.
c.The absorbent polymer shall be on the Department’s Approved Products List.
16.a. The pre-emergent chemical shall be dimethyl- tetrachloroterephthalate (Dacthal) or an approved equal.
b.The post-emergent chemical shall be glysophate (Roundup) or an approved equal.
17.Rocks, sods, clods, or other ba ckfill materials that would tend to form air pockets and which will not compact uniformly shall not be used.
825.03 Construction Methods
1.Storing and Transporting Plant Materials: a. All plant material shall be transported in a covered conveyance to and from the storage area and shall be packed to assure proper protection against injury.
b.Plants that cannot be planted immediately after delivery from the supplier shall be kept in storage.
c.Bare root plant material shall be stored in a building. Their roots shall be kept moist and protec ted with soil, sawdust, wood chips, shingle toe, moss, peat, straw, hay, or other acceptable moisture holding media.
d.Storage for the balled and burlapped or container-grown plant material shall be in a protected outside area.
e.All storage sites/facilities shall have a water source, good ventilation, protection from sun and drying wind, and be approved by the Engineer before delivery of the plants.
f.Plants in storage (stored plants) shall be watered daily.
825.03 Furnishing and Planting of Plant Materials
- 710 - 2. Plant materials shall not be brou ght to the construction site until sufficient area has been prepared to allow proper and immediate planting.
3.a. The Contractor shall dip all bare-root stock in a slurry of fully hydrated absorbent polymer and water before transporting plants from storage to the planting site.
b.The mixing ratio for the polym er shall be as directed by the manufacturer and shall produce a gel that fully adheres to all roots and forms a coating around them.
4.The Contractor shall protec t plant material, on site and not immediately planted, from freezing, drying, breaking, overheating, and other injuries.
5.a. The Contractor shall till ex isting vegetation at the planting site into the soil before excavating the planting hole. The dimensions of the area and the depth to be tilled shall be shown in the contract.
b.The Contractor shall cut and remove all volunteer trees or brush within the planting area that cann ot be removed by tilling. Immediately after cutting, stumps shall be treated with 2-4-D amine or other approved chemicals.
c.The Contractor may accomplish this preparation work in the fall before the spring planting season with written permission from the Engineer.
d.All trees and brush shall be disposed of in a manner satisfactory to the Engineer.
6.a. For the balled and burlapped plants, the Contractor shall set the ball carefully into the hole on undisturbed soil at the proper planting depth as shown in the contract.
b.The Contractor shall pl umb and partially backfill the ball enough to stabilize the plant in position.
c.All twine shall be cut away from the trunk and removed from balled and burlapped plants. Wire baskets shall be cut off half way down the side of the ball. The burlap shall be pulled back from the trunk and cut off.
d.The Contractor shall properly place the fertilizer tablets, complete the backfill, and then consolidate by watering.
e.Wire baskets, twine, and burlap shall be removed from the project site.
f.Balled and burlapped material which is dropped into the planting hole or so roughly handled as to cause the ball to crack and pull away from the roots shall be rejected.
7.a. The Contractor shall exam ine bare rooted plants, and any bruised or broken root shall be pruned to leave a clean cut.
b.The plant shall be set in the hole at the same depth as it was grown and then plumbed and partially backfilled.
c.The fertilizer shall be pr operly placed in the hole.
d.The backfilling shall then be completed and consolidated by watering. Furnishing and Planting of Plant Materials 825.03 - 711 - 8. a. The Contractor shall fertilize all plant material during the planting operation as indicated below or as shown in the contract.
b.Fertilizer shall never be pl aced in direct contact with plant roots.
c.Pressure-formed pelleted fertilizer shall be placed into the planting hole during planting after the plants are partially backfilled (approximately 50% of the backfill material in place) at the following rates:
1.Three pellets per plant for all shrubs and vines. (2) Six pellets per plant for all trees less than 2 inches (50 mm) in trunk caliper or less than 8 feet (2.4 m) in height.
3.Ten pellets per plant for all trees larger than 2 inch (50 mm) in trunk caliper or taller than 8 feet (2.4 m) in height.
d.(1) Establishment period fe rtilizer shall be applied between May 15 and June 1 of the year following initial planting.
2.All trees and shrubs shall be fertilized with a liquid solution.
3.The solution shall be placed in the water basin and metered to insure the solution is applied as specified.
4.The fertilizer shall be mixed at the rate of one part of liquid urea per 300 parts of water and applied at the following rates:
i.Coniferous shrubs: 1 gallon of solution per foot (12L of solution per mete r) of foliage spread. (ii) Coniferous trees: 1 gallon of solution per foot (12L of solution per meter) of plant height. (iii) Deciduous shrubs: 1 gallon of solution per foot (12L of solution per meter) of plant height. (iv) Deciduous trees: 5 gallons of solution per inch (0.80L of solution per millimeter) of trunk caliper.
9.a. The Contractor shall t horoughly water all plant material following the backfilling operation th e same day they are planted. This watering shall completely saturate the backfill. After the ground settles as a result of the watering, additional backfil l shall be placed to match the level of the finished grade as shown in the contract.
b.The plant shall be adjusted to sit at the same elevation as it was growing.
c.(1) Plant material shall be watered on the same day it is planted.
2.All planting shall cease until the watering is caught up to the specified time limit.
d.The plant material shall be kept in a moist condition as dictated by weather conditions, soil conditions, and as directed by the Engineer until final acceptance.
e.All plant material shall be wa tered, on average over the project life, every 10 days during the establis hment period unless excused by the Engineer.
825.03 Furnishing and Planting of Plant Materials
- 712 - f. The recommended water application rates are shown in Table 802.01. Table 825.01 Recommended Plant Establishment Watering Rates Plant Type Water Application Rate Trees 10 gallons (38L) per tree every 10 days Shrubs 5 gallons (19L) per shrub every 10 days
10.a. The Contractor shall pr operly prune all deciduous plant material to remove dead or broken roots and branches, to improve plant structure, and to remove any branc hes that are rubbing each other.
b.All pruning cuts shall be made with a sharp tool. c. All branches removed by pruning shall be disposed of in a manner satisfactory to the Engineer.
11.a. When the backfill is complete and watered, the Contractor shall stake and guy the trees as shown in the contract. The stakes shall be driven so they support the trees, but stakes shal l not penetrate the ball or roots of the plants.
b.Guys shall be sufficiently tight to transfer support from the stake to the tree and yet allow some movement for proper trunk development.
12.The Contractor shall construct a watering basin for all plants as shown in the contract. A second watering shall be applied in the completed watering basin before placing the mulch.
13.a. The Contractor shall mulch all planted areas as specified and as shown in the contract.
b.The mulch shall be applied upon completion of the watering basin and after the pre-emergent has been applied.
c.Mulch shall cover all disturbed earth. 14. a. The Contractor shall furnis h and apply pre-emergent chemicals to the areas indicated in the contract before mulching and again the next spring. The application rate shall be the midrange of the manufacturer's suggested rate.
b.The Contractor shall furnish and apply post-emergent chemicals to all mulched areas to control weeds as needed or directed by the Engineer during the establishment period. The application rate shall be the midrange of the manufacturer's suggested rate.
15.a. The establishment period will not begin until all of the following items of work, as required in the c ontract, have been performed on each and every plant: planting, backfilling, fert ilizing, watering, pruning, staking, guying, water basin construction, applic ation of chemical vegetation control, and mulching.
b.Each plant shall be in an acceptable growing condition to enter the establishment period and qualify for partial payment.
c.The establishment period s hall be until June 1 of the year following the year in which the plant material was planted. The establishment Furnishing and Planting of Plant Materials 825.04 - 713 - period may be extended for an additional 12 months for failure to maintain the plant material as specified or for pr oviding incorrect varieties or species.
d.During the establishment per iod, the Contractor shall properly maintain all materials under the contra ct and shall replace all unacceptable plant material in the spring planting season. The establishment procedures shall include:
1.Additional pruning;
2.Protective measures against pests and diseases; (3) Watering an average of every 10 days, or as often as required by necessity or the direction of the Engineer;
4.Repairing damage to the watering basins;
5.Replacing mulch which becomes displaced;
6.Keeping the stakes firm and the guys adjusted; (7) Weed control with a pre-emergent and post-emergent chemical applications or other approved means;
8.Other establishment proc edures as deemed necessary by the Engineer, including the removal of any dead plant material from the project site.
e.(1) Upon completion of the establishment period, the Contractor and the Engineer will make a joint inspection of the project for acceptability.
2.The Engineer will determine acceptability of the plant material.
3.The inspection will normally be made during the week that the establishment period terminates.
4.The Contractor will be notified of the date of the inspection.
5.All items of maintenance shall have been performed on the plant material before the inspecti on, and any item of maintenance that has not been performed may make a plant unacceptable.
6.The Contractor will be given written notification by the Engineer when the establishment respon sibilities on the acceptable plant materials are terminated.
f.The stakes and guys shall be removed from the plant material in the spring following the year in whic h the material was planted. The stakes shall be left on any replacement plant material. The Engineer may note exceptions. All stakes and guys furnished by the Contractor shall remain the property of the Contractor and s hall be removed from the project.
825.04 Method of Measurement
1.The work of furnishing and planting of plant materials will be measured by the each as listed in the bid proposal Schedule of Items.
825.05 Furnishing and Planting of Plant Materials
- 714 - 825.05 -- Basis of Payment
1.P a y I t e m P a y U n i t _____ (Species) _____ (Size) Each (ea)
2.Partial Payment. The progress estimate payment schedule for planted materials is shown in Table 825.02.
3.The Engineer and Contractor will make an inspection on or about September 1 to determine the plants in an acceptable growing condition. The Engineer will determine acceptability of the plant material at the inspection.
4.If a plant is determined to be not acceptable, any 10% payment for establishment work after that determination will not be made. Table 825.02 Maximum Payment Percentages of Contract Unit Price (Spring Planting Only) Percent Authorization Time Payment is Authorized Criterion for Payment 50% of the contract price of each applicable item. After Planting Complete 1. Plant materials meet the Specifications, have been properly stored and transported to the work site. Furnishing and Planting of Plant Materials 825.05 - 715 - Table 825.02 (continued) Maximum Payment Percentages of Contract Unit Price (Spring Planting Only) Percent Authorization Time Payment is Authorized Criterion for Payment An additional 10% of the contract price of each applicable item. An additional 10% of the contract price of each applicable item. An additional 10% of the contract price of each applicable item. July 31 August 31 September 30 1. Plant materials have been properly maintained as specified during the establishment period. 2. The Engineer will determine at the “Time Payment is Authorized” date whether procedures have been properly performed for the time interval indicated. At the July 31 authorization date, all establishment procedures from time of planting until July 31 will be evaluated; at the August 31 date, all establishment procedures from August 1 to 31 will be evaluated; and on September 30, all establishment procedures from September 1 to 30 will be evaluated.
3.The Contractor will notify the Engineer when the establishment procedures are being accomplished in order to get paid for the work. If all establishment procedures are not performed, the Contractor will forfeit the 10% payment for establishment work for the interval(s) which were unacceptable and the Contractor cannot regain that payment. 4. An inspection will be conducted around September 1 to determine the number of plants that are acceptable. 5. If a plant is determined to be not acceptable, any 10% payment for establishment work after that determination will not be made. However, plants that are replaced before June 1 of the original planting year will be considered original plants.
825.05 Furnishing and Planting of Plant Materials
- 716 - Table 825.02 (continued) Maximum Payment Percentages of Contract Unit Price (Spring Planting Only) Percent Authorization Time Payment is Authorized Criterion for Payment An additional 20% of the contract price for all acceptable items. At the end of the establishment period. 1. The establishment period is completed. 2. All establishment procedures are complete and verified by the Engineer on all replanted material. 3. The Engineer has inspected the project and determined the acceptability of each plant based on the normal growth habit for the species or variety.
5.a. If establishment procedur es were properly performed, the Engineer notified, etc., for the indicated time intervals in Table 825.02, then on July 31, August 31, and September 30, a payment for each period equivalent to 10% of the contract pric e of each item will be made on all acceptable plants.
b.If establishment procedures are not performed in any of the time intervals in Table 825.02, then the “10% payment” for establishment work for the intervals that are unacceptable, are not authorized and those 10% payments will never be made.
6.a. The unacceptable plantings from the September inspection and any additional losses from the winter shall be replaced during the subsequent spring planting season. Payment for replacement plant establishment work is not authorized. Plant replacement shall be at no additional cost to the Department and shall be in accordance with the contract.
b.No additional planting fertilizer is required on replacement plant material.
c.The Contractor’s responsibilit y for all replacement plants shall extend for 30 days after the last plant to be replaced is properly planted and accepted by the Engineer. No payments for replacement plants will be made until 30 days after the last plant is re placed. If plants are not replaced, the Engineer will deduct the 50% payment made at the original planting and will not make the 20% payment due at t he end of the establishment period.
7.All payments and deductions will be made in terms of the number of plants at the contract unit price that equals the payment or deduction authorized.
8.Payment is full compensation for all work described in this Section. Payments and deductions are made fr om Department determinations of whether or not the work shown in T able 825.02 is properly completed. - 717 - DIVISION 900 -- INCIDENTAL CONSTRUCTION 901 – FIELD LABORATORIES, FIELD OFFICES, AND SCALE HOUSES .................................................................................................................. 721
901.01 Description ........................................................................... 721
901.02 Material Requirements ........................................................ 721
901.03 Construction Methods ......................................................... 724
901.04 Method of Measurement ...................................................... 724
901.05 Basis of Payment .................................................................. 724
902 -- GUARDRAIL AND GUARD POSTS ............................................... 725
902.01 Description ........................................................................... 725
902.02 Material Requirements ........................................................ 725
902.03 Construction Methods ......................................................... 726
902.04 Method of Measurement ...................................................... 727
902.05 Basis of Payment .................................................................. 728
903 -- REMOVE AND R ESET GUARDR AIL ............................................ 729
903.01 Description ........................................................................... 729
903.02 Material Requirement .......................................................... 729
903.03 Construction Methods ......................................................... 729
903.04 Method of Measurement ...................................................... 729
903.05 Basis of Payment .................................................................. 730
904 -- INERTIAL BA RRIER MO DULES ................................................... 731
904.01 Description ........................................................................... 731
904.02 Material Requirements ........................................................ 731
904.03 Construction Methods ......................................................... 731
904.04 Method of Measurement ...................................................... 731
904.05 Basis of Payment .................................................................. 731
905 -- ROCK RI PRAP ............................................................................... 732
905.01 Description ........................................................................... 732
905.02 Material Requirements ........................................................ 732
905.03 Construction Methods ......................................................... 732
905.04 Method of Measurement ...................................................... 733
905.05 Basis of Payment .................................................................. 733
906 -- BROKEN CONCRETE RIPRAP ..................................................... 734
906.01 Description ........................................................................... 734
906.02 Material Requirements ........................................................ 734
906.03 Construction Methods ......................................................... 734
906.04 Method of Measurement ...................................................... 735
906.05 Basis of Payment .................................................................. 735
907 -- GABIONS AND RE VET MATTR ESSES ........................................ 736
907.01 Description ........................................................................... 736
907.02 Material Requirement .......................................................... 736
907.03 Construction Methods ......................................................... 736
907.04 Method of Measurement ...................................................... 736
907.05 Basis of Payment .................................................................. 736
908 -- CONCRETE SLOPE PROTECTION, DITCH LINING, FLUMES AND DISCHARGE ST RUCTURES ................................................................... 737 908.01 -- DESCRIPTION ........................................................................... 737
908.02 Material Requirements ........................................................ 737
908.03 Construction Methods ......................................................... 737
908.04 Method of Measurement ...................................................... 738
908.05 Basis of Payment .................................................................. 739
909 -- INSTALLING TIE BARS ................................................................. 740
Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 741–750 of 1,048.