620SEEDING

620.01Description. This item shall consist of furnishing and

applying lime, fertilizer, seed, mulch cover, aspha lt, and water according to these specifications at locations show n on the plans or as directed. The work under this item shall be accomplished as s oon as practicable after the grading in an area has been c ompleted in order to deter erosion of the roadway and siltation of st reams.

620.02Materials. (a) Lime shall be agricultural grade ground

limestone or equivalent as approved by the Engineer .

composition, free flowing, and suitable for application with mechanical equipment. It shall be delivered to the site in labeled containers conforming to current Arkansas fertilize r laws and bearing the name, trademark, and warranty of the pr oducer.

current rules and regulations of the Arkansas State Plant Board and the germination test shall be valid on the date the seed is used. It shall have a minimum of 98% pure seed and 85% germi nation by weight, and shall contain no more than 1% weed seeds. A combined total of 50 noxious weed seeds shall be the maximum amount allowed per pound (110 per kg) of seed with the fol lowing exceptions: Johnson grass seed, wild onion seed, wi ld garlic seed, field bindweed seed, nut grass seed, sickle pod see d, sesbania seed, indigo seed, morning-glory seed, cocklebur seed, ba llonvine, crotalaria spp., serrated tussock, and tropical sod a apple will not be allowed in any amount. Seed shall be furnished in sealed, standard containers. Seed that has become wet, moldy, or ot herwise damaged in transit or in storage will not be acceptable. Crimson clover shall be inoculated with an approved culture as recommended by the manufacturer, just prior to seeding. The Wildflower Mix shall be the following seed vari eties and rates: 620 473 Common Name Latin Name lbs./acre kg/ha Black-eyed Susan Rudbeckia hirta 0.5 0.6

Gay feather Liatris pycnostachya 0.5 0.6 Purple coneflower Echinacea purpurea 0.5 0.6 Showy primrose Oenothera speciosa 0.5 0.6 Lanceleaf coreopsis Coreopsis lanceolata 1.0 1.1 Plains coreopsis Coreopsis tinctoria 1.0 1.1 4.0 4.6 Wildflower seed not regulated by the Arkansas State Plant Board shall have a minimum of 95% pure seed and 65% germi nation by weight, and shall contain no more than 1% weed seeds. Seed shall be composed of the varieties and amounts by weight as shown below. Seed planted between June 16 and August 31 may requ ire more water than that specified in Subsection 620.03(f) i n order to survive. Therefore, watering shall continue after germinatio n until growth is established. The seeding mixture may be altered by the Engineer in selected areas with no adjustment in contract price. The al teration shall be on an equivalent cost basis. Additional cereal grass seed may not be applied in excess of the rates shown below. The Engineer may permit the app lication of up to 15 lbs./acre (15 kg/ha) of additional cereal gra ss seed if the Contractor provides a written request which includes an agreement to mow the cereal grass growth before the seed heads form and prior to acceptance of the project to allow for the germi nation and growth of the other grasses in the seed mix. All mowing a nd additional seed will be done at no cost to the Department.

Seed Variety: lbs/acre kg/ha Group I Districts 1, 2, 5, 6, and 10 March 1 - June 15 Bermuda Grass (Common) unhulled 5 5 Bermuda Grass (Common) hulled 10 10 Lespedeza (Kobe) 10 10 620 474 Wildflower Mix 4.0 4.6 June 16 - August 31 Bermuda Grass (Common) unhulled 5 5 Bermuda Grass (Common) hulled 10 10 Wildflower Mix 4.0 4.6 September 1 - February 28/29 Wheat 15 17 Crimson Clover (Dixie) 10 10 Bermuda Grass (Common) unhulled 20 20 Wildflower Mix 4.0 4.6

Group II Districts 3, 4, 7, 8, and 9 March 15 - June 15 Bermuda Grass (Common) unhulled 5 5 Bermuda Grass (Common) hulled 10 10 Lespedeza (Korean) 10 10 Wildflower Mix 4.0 4.6

June 16 - August 31 Bermuda Grass (Common) unhulled 5 5 Bermuda Grass (Common) hulled 10 10 Wildflower Mix 4.0 4.6 September 1 - March 14 Annual Rye Grass or other Cereal Grasses 10 10 Crimson Clover (Dixie) 10 10 Bermuda Grass (Common) unhulled 20 20 Wildflower Mix 4.0 4.6

wheat, barley, or rye; of wood excelsior; or of hay obtained from various legumes or grasses, such as lespedeza, clover, vetch, soybeans, bermuda, carpet sedge, bahia, fescue, or other legumes or grasses; or a combination thereof. Mulch shall be dry and reasonably free from Johnson grass or other noxious weeds, and shall not be excessively brittle or in an advanced state of 620 475 decomposition. All material will be inspected and approved prior to use.

such quality that the mulch cover will be bound tog ether to form a cover mat that will stay intact under normal climat ic conditions. All tackifiers used shall have prior approval or be listed on the Department's Qualified Products List (QPL).

would be detrimental to plant growth.

620.03Construction Requirements. (a) Seedbed Prepa ration

Areas to be seeded shall be dressed to the shape an d section shown on the plans. If the plans call for replacing tops oil, this shall be done before any preparations for seeding. Before beginning the seedbed preparation, soil samples shall be obtained from ea ch major soil area (such as cut backslope or fill foreslope) by the En gineer for lime requirement analysis. Lime, at the rate determined by the lime requiremen t test, shall be uniformly spread on areas to be seeded prior to the ir being roughened or scarified. The seedbed shall be thoro ughly pulverized by means of disk harrows or other approved methods, thoroughly mixing lime and soil to a depth of not less than 4" (100 mm) (2" [50 mm] for slopes 4:1 or steeper) below finish slo pe elevation. Regardless of the pulverizing method used, the soil shall be broken with the contour of the slope. Objectionable forei gn matter shall be removed and the soil left in a suitable horticultural condition to receive the fertilizer and seed. Water may be appl ied before, during, and after seedbed preparation, as directed by the E ngineer, in order to maintain the desired moisture content in the soi l. When no lime is required, seedbed preparation shall be accomplished as specified above regardless of the m ethod used in the distribution of fertilizer, seed, and mulch cover.

pounds per acre (900 kg/ha) of 10-20-10, or the equ ivalent amount of plant food. Fertilizer shall be uniformly incor porated into the soil alone or in conjunction with the required lime. If the Contractor so elects, the fertilizer may be drilled into the soil or combined with the seed in the hydro-seeding operation. 620 476 (c) Seeding. (1) Broadcasting. Broadcast sowing may be accomplished by hand seeders or by approved power e quipment. Either method shall result in uniform distribution and no work shall be performed during high winds. The area seeded sh all be lightly firmed with a cultipacker immediately after broadca sting.

be horizontal (parallel to contour lines). Fertili zer and seed shall not be drilled together and shall not be mixed.

fertilizer and seed may be incorporated into one op eration but a maximum of 800 pounds of fertilizer shall be permit ted for each 1500 gallons (maximum of 95 kg for each 1500 L) of water. If the Contractor so elects, the fertilizer may be applied during preparation of the seedbed. The area shall be lightly firmed w ith a cultipacker immediately before hydro-seeding.

4000 pounds per acre (4500 kg/ha) immediately after seeding and shall be spread uniformly over the entire area by a pproved power mulching equipment. When approved by the Engineer, the Contractor may use hand methods to apply mulch cove r to small or inaccessible areas. If the Contractor so elects, a n approved mulching machine may be used whereby the application of mulc h cover and tackifier may be combined into one operation. If t his method is used, no change in application rates will be allowe d. In its final position, the anchored mulch shall be loose enough to allow air to circulate, but compact enough to partially shade th e ground and reduce the impact of rainfall on the surface of the soil. Care shall be taken to prevent tackifier materials from discolori ng or marking structures, pavements, utilities, or other plant gr owth. Removal of any objectionable discoloration shall be at no cost to the Department.

application of the mulch cover on seeded areas, the mulch shall be anchored by one of the following methods: •• •• Tracking or Roller Method. The mulch shall be effectively pressed into the soil using steel cleated track or cleated roller equipment. The anchoring shall be performed so tha t the grooves formed are perpendicular to the flow of water down 620 477 backslopes and foreslopes. The equipment and metho d used shall produce acceptable results. •• •• Asphalt Tackifier. Asphalt shall be applied at the rate of approximately 0.05 gallon per square yard (0.2 L/sq m). Application shall be made using a pressure distribu tor to ensure constant and uniform distribution. The use of asphalt may be reduced or eliminated by the Engineer at sel ected locations. •• •• Other Tackifiers. Tackifiers listed on the QPL shall be applied according to the rates recommended in the Q PL. The method used shall be at the Contractor's option unless otherwise specified or directed. In lieu of separa te application of tackifiers, the Contractor may use equipment that c ombines the application of mulch and tackifier into one operati on. Application shall be at the specified rates.

December 31, either the day before the seeding is p laced or on the day of the seeding operation (either before the see d is placed or after the application of the mulch cover), a minimum of 2 0.4 M Gallons per acre (188 cu m or 188 kL per ha) of water will be applied to thoroughly moisten the soil to the depth of pulveri zation and then as necessary to germinate the seed. This quantity may be reduced by the Engineer dependent on the soil moisture conditi ons immediately prior to the application of the seeding. Failure t o apply the initial application of the quantity of water directed by th e Engineer will result in a deduction in payment as shown below. W ater used for hydro-seeding or tackifier application will not be measured or paid for, and will not be included in the quantity of wa ter required for the initial water application. The initial application of water and deductions for failure to water will not be require d from January 1 through March 31.

otherwise directed by the Engineer, the Contractor shall apply water in an amount such that, in conjunction with any rai nfall, the seeded and mulched areas will receive an amount equivalent to a minimum of ¾” (19 mm) of water each week beginning the week after seeding and continuing for a minimum of four (4) weeks (¾” [19 mm] of water is equivalent to 20.4 M Gallons per acre [ [ 18 8 cu m or 188 kL 620 478 per ha]). The Engineer will adjust the amount of w ater required each week to deduct any rainfall received during th e 7 calendar day period prior to the weekly watering. The weekly ap plications of water and deductions for failure to water will not be required from January 1 through March 31.

permanent recovery of payments equal to the minimum bid price established below for each M.G. (kL) not applied as directed in accordance with these specifications. Additional w ork and materials required due to the Contractor’s negligence in main taining completed work or failure to water grass as directe d shall be accomplished at no cost to the Department.

project such equipment of adequate capacity and a s uitable water supply to achieve the desired moisture level in the soil. The equipment and methods used will be such that the ap plication of water will not cause erosion or excessive movement of the previously placed seed and mulch cover. Any slope that is eroded or any seed or mulch cover that is washed down the slope due to failure to follow the above requirement will be repaired an d/or reseeded at no cost to the Department. The time required for application of water will not be included in the computations of contract time for completion of the project provided all other work under the Contract has been completed.

September 1-March 14 season, final acceptance will be delayed until an acceptable stand of grass of uniform color and d ensity is established to the satisfaction of the Engineer. T he soil condition shall be suitable for preparation of the seedbed ac cording to the above requirements in the areas to be seeded during the September 1-February 28/29 or September 1-March 14 season.

any seeding or mulching that is defective or damage d. If the defect or damage is due to the Contractor's negligence, th e work shall be done at no additional cost to the Department. If t he damage or defect is not the Contractor's fault, the work will be measured and paid for according to these specifications. 620 479 620.04 Method of Measurement. (a) Lime will be measured by the ton (metric ton).

covered.

area covered.

[1,000 L]). Payment will be made to the nearest 10 0 gallons (100 L), based on calibrated tank or meter measurem ents.

620.05Basis of Payment. (a) Lime completed and accepted and

measured as provided above will be paid for at the contract unit price bid per ton (metric ton) for Lime, which pric e shall be full compensation for furnishing, hauling, and placing; and for all labor, equipment, tools, and incidentals necessary to comp lete the work.

above will be paid for at the contract unit price b id per acre (hectare) for Seeding, which price shall be full compensation for seedbed preparation; for furnishing and applying fertilizer and seed; and for all labor, equipment, tools, and incidentals necessary to complete the work.

provided above will be paid for at the contract uni t price bid per acre

for furnishing, hauling, and applying mulch materia l; for mulch anchoring; and for all labor, equipment, tools, and incidentals necessary to complete the work.

for at the contract unit price bid per M.G. (kiloli ter) for Water, which price shall be full compensation for furnishi ng, hauling, and applying water as directed; and for all labor, equi pment, tools, and incidentals necessary to complete the work. Water used for hydro- seeding will not be paid for separately, but full c ompensation therefor will be considered included in the contrac t unit price bid for Seeding. 620 480 A minimum bid price shall be entered in the proposa l for the item “Water”, in accordance with the table below. Any u nit bid price submitted in an amount less than the specified mini mum will be automatically adjusted to the specified minimum to determine the correct total bid. This adjustment to the specifie d minimum will be automatically made, without any counter-adjustments in prices for other items. Failure to water in accordance with these specifications or as directed will result in a loss to the Department of vegetative growth and vitality which is difficult to calculate. A pe rmanent deduction in payment and/or permanent recovery of payments equal to the minimum bid price will be made as an item deduction for each M.G.

for damages sustained by the Department. Total Plan Quantity for Seeding Minimum Bid Price Less than 5 acres (2 hectares) $10.00 per M.G. ($4.00 per kL) Greater than or equal to 5 acres (2 hectares) $5 .00 per M.G. ($2.00 per kL) Payment will be made under: Pay Item Pay Unit Lime Ton (Metric Ton) Seeding Acre (Hectare) Mulch Cover Acre (Hectare) Water M.G. (Kiloliter)