SECTION 1202 – SEEDING
This item shall consist of seeding the areas shown on the plans or as directed by the ENGINEER in accordance with these specifications.
1202-2.1 SEED. All seed shall be of certified class quantity and shall be certified by the state in which the seed variety was grown. All seed containers must be sealed and labeled to comply with existing North Dakota Seed Laws and Regulations or in accordance with U.S. Department of Agriculture Rules and Regulations under the Federal Seed Act, if shipped in Interstate Commerce. Seed shall be furnished separately or in mixtures in standard containers with the seed name including variety and species, lot numbers net weight, percentages of maximum weed seed content clearly marked for each kind of seed. The CONTRACTOR shall furnish the ENGINEER duplicate signed copies of a statement by the vendor certifying that each lot of seed has been tested by a recognized laboratory for seed testing within nine (9) months of date of delivery. Seed not planted within the nine-month period shall be retested for dormant seed, hard seed, and germination, and a new certified test report furnished. This statement shall include: Name and address of laboratory, date of test, lot number for each kind of seed and the results of tests as to name, percentages of purity and of germination, and percentage of weed content for each kind of seed furnished and, in case of a mixture, the proportions of each kind of seed. The minimum acceptable purity, germination, weed seed, and other crop seed are those of certified class seed.
Seed which has become wet, moldy, or otherwise damaged in transit or in storage will not be acceptable.
Seed mixture shall contain not less than the specified percent of Pure Live Seed and shall be uniformly mixed by weight to one of the following formulas:
SEED CLASSIFICATION TABLE
(Rate of Application of Pure Live Seed)
Percent Percent Pure
by Weight Variety and Species of Grass Seed Live Seed
(For Pasture or Hayland, Fairly Level Surface)
40 'MDN-759' Pubescent Wheat Grass (R) 85
40 'NORDAN' Crested Wheat Grass (B) 85
20 'PRIMAR' Slender (B) or 'OAHE' Intermediate Wheat Grass (R) 85
(Turfgrass For Sunny Areas)
(5 lbs./100 SY)
85 'PARK' Kentucky Blue Grass (R) 85
15 'ARCTARED' Creeping Red Fescue (R) or 'DURAR' Hard
Fescue (R) 85
(Turfgrass For Shady Areas)
(5 lbs./100 SY)
60 'PARK' Kentucky Blue Grass (R) 85
40 'ARCTARED' Creeping Red Fescue (R) or 'DURAR' Hard
Fescue (R) 85
(For Level Surface or Gentle Slopes)
100 'LINCOLN' Smooth Brome Grass (R) 85
(For Slopes 3:1 or More)
50 'LINCOLN' Smooth Brome Grass (R) 85
50 'NORDAN' Crested Wheat Grass (B) 85
(For Critical, Saline Area)
40 'PARKWAY' Fairway Crested Wheat Grass (B) 85
20 'PRIMAR' Slender Wheat Grass (B) 85
40 'ROSANA' Western Wheat Grass (R) 85
As specified on the plans or in the Special Provisions
When Class V seed mixture is specified, it shall be sown at the rate of 25 pounds per acre; 40 to 60 pounds of phosphorus and 20 to 30 pounds of actual nitrogen per acre shall be mixed into the upper 3 inches of the soil or spread on the soil prior to seeding or by means of fertilizer attachment on the drill. Fertilizer shall not be mixed with the seed.
When Class I, III, IV, or V seed mixture is specified and seeding is performed between August 20 and September 20, or when dormant seeding in late fall, 30 pounds of oats or rye seed per acre shall be added to the mixture as a nurse crop. This nurse crop shall be mowed before it reaches 6 inches in height.
If seed with the specified percentage of pure live seed cannot be obtained, additional seed may be used to bring the amount of live seed up to the amount specified. Seed and seeding mixtures shall be free of all prohibited noxious weed seed and shall not contain more than .5 percent by weight of restricted noxious weed seeds. Prohibited and restricted noxious weeds shall be those as classified by the State Seed Department.
1202-2.2 TOPSOIL. Topsoil shall consist of loose, friable, loamy topsoil that is free of excess acid and alkali. It shall be free from objectionable amounts of sod, hard lumps, gravel, sub-soil, or other undesirable material which will prevent the formation of a suitable seed bed. Topsoil shall, prior to being stripped, have demonstrated by the occurrence upon it of healthy crops, grass, or other vegetable growth that is of good quality, and that it is reasonably well drained.
1202-2.3 LIME. Lime, if specified, shall be ground limestone containing not less than 85 percent of total carbonates, and shall be ground to such fineness that 90 percent will pass through a No. 20 mesh sieve and 50 percent will pass through a No. 100 mesh sieve. Coarser material will be acceptable, providing the rates of application are increased to provide not less than the minimum quantities and depth specified by an approved testing laboratory on the basis of the two (2) sieve requirements above. Dolomitic lime or high magnesium lime shall contain at least 10 percent of magnesium oxide.
1202-2.4 FERTILIZER. Fertilizer, if specified, shall be standard commercial fertilizers supplied separately or in mixtures containing the percentages of total nitrogen, available phosphoric acid, and water soluble potash. They shall be applied at the rate and to the depth specified and shall meet the specified requirements of the applicable State and Federal laws. They shall be furnished in standard containers with name, weight, and guaranteed analysis of contents clearly marked thereon. No cyanamide compounds of hydrated lime shall be permitted in mixed fertilizers.
The fertilizers may be supplied prior to seeding in one of the following forms:
(a) A dry, free-flowing fertilizer suitable for application by a common fertilizer spreader;
(b) A finely-ground fertilizer soluble in water, suitable for application by power sprayers; or
(c) A granular or pellet form suitable for application by blower equipment.
(i) Fertilizer shall not be applied after seeding.
(ii) The fertilizer shall not be mixed with the seed, but it may be applied at the same time as the seed if a suitable fertilizer attachment on the equipment is used.
(iii) The fertilizer may be mixed into the hydro-mulch mixture as it is applied.
1202-2.5 SOIL FOR REPAIRS. The soil for fill and topsoil of areas to be repaired shall be at least of equal quantity to that which exists in areas adjacent to the area to be repaired. The soil shall be relatively free from large stones, roots, stumps, or other materials that will interfere with subsequent sowing of seed, compacting, and establishing turf, and shall be approved by the ENGINEER before being placed.
1202-2.6 RESEEDING AND REPAIR. Damage caused from wind or water erosion, contractor’s operation, or traffic, which can be repaired with equipment normally used for seeding work, shall be repaired at the contractor’s expense. The CONTRACTOR shall make any repairs as directed by the ENGINEER prior to final acceptance.
1202-3 CONSTRUCTION REQUIREMENTS
1202-3.1 SEEDING DATES. Seeding shall be done at such times of the year when the climatic conditions of temperature and moisture are most adaptable for growth and work of this nature. It is preferred that seeding shall be accomplished before May 20 and after October 20 of each year. Plant after October 20 when there is no chance of fall germination as dormant seedings are made for spring germination. Also plant early enough in fall to allow at least forty (40) days for seedlings to develop before they go dormant in the fall, preferably before September 10. Planting between May 20 and September 10 will be allowed if adequate moisture can be provided.
1202-3.2 SEEDBED PREPARATION. The areas to be seeded shall be cleared of all debris, rank vegetation, and other material that is detrimental to the preparation of a seed bed. The areas thus cleared shall be shaped or bladed by approved equipment to the plan’s cross section or to such cross section that best fits the existing conditions. The areas thus prepared shall be disked, harrowed, raked, or worked by some other approved method, into a reasonably smooth, even seed bed. The surface of the prepared seed bed shall be firm enough so that adult footprints are hardly visible and will limit seeding depth to a maximum of 3/4 of an inch. If rolling is necessary to secure this, it shall be done prior to the seeding and with and approved roller, the weight of which shall be dependant upon the particular soil conditions.
All slopes shall be worked on the contour, or as directed by the ENGINEER.
Fertilizer and/or lime, when specified, shall be spread and worked into the soil during the final preparation of the seed bed.
The CONTRACTOR shall take four (4) representative and suitably sized samples of the soils which are to form the seed bed and shall submit these samples to an approved testing laboratory for analysis and recommendation of fertilizer to be used. Sampling and testing shall be done with sufficient promptness so as to avoid delaying the work. Test results shall be submitted to the ENGINEER.
1202-3.3 SEED APPLICATION. Seed shall be sown by means of a force feed drill with a grass seed attachment which provides a uniform flow and depth of seed placement (1/4 to 1/2 inches), except that on slopes steeper than three to one or on areas too small to be seeded with a force feed drill, seed may be sown by power sprayers, blowers, or other approved methods. Grass drills shall be calibrated to ensure proper seeding rates (pure live seed rate divided by purity and germination percentages) for calibrating the drill. The soil shall be repacked immediately after the seed is applied to firm the soil around the seed. All equipment shall be in good working order and shall be approved by the ENGINEER.
Kentucky Bluegrass shall be seeded a very shallow depth or on the surface and cultipacked.
No seed shall be sown during winds that are strong enough to prevent it from being properly imbedded into the surface.
No seed shall be sown in standing water or frozen ground.
When specified, mulching shall be applied immediately or within 24 hours after seed application in accordance with Section 1203.
1202-3.4 ESTABLISHING GRASS STAND. The seeded area shall be kept moist until it has germinated and its continued growth assured. In all cases, watering shall be done in a manner which will avoid erosion from the application of excessive quantities and will avoid damage to the finished surface. Water will be considered incidental to the items "Seed."
All seeded areas shall be protected against traffic or other use by warning signs or barricades approved by the ENGINEER.
Additional watering during dry periods and mowing of seeded areas shall be performed until the stand is firmly established. Weeds or other undesirable vegetation shall be rotary mowed above the new grass seedlings before they reach a height of six inches, and the clippings shall be raked and removed from the area.
Broadleaf weeds shall be controlled by rotary mowing or by applying a post emergence herbicide in accordance with North Dakota State University Weed Control Guide and manufacturer’s recommendations after majority of grass plants have three leaves or more and weeds reach a 4-inch height.
1202-3.5 GRASS STAND ACCEPTANCE. To determine adequacy of stands and to determine if reseeding or reinforcement seeding is required, the stand shall be evaluated by the ENGINEER and shall meet the following requirements before the grass stand is accepted: Seedling emergence shall be uniform over the entire area. Stand counts shall indicate a density of at least 20 to 30 seedlings per square foot of area. Twenty seedlings per square foot for rhizomatous type species and 30 for a bunch type or a mixture of bunch type and rhizomatous type.
The CONTRACTOR shall furnish and replace without compensation therefor, any seed for areas that have not germinated, have died, or are damaged to the extent that replacement is required to conform to the requirements outlined above. The contract warranty period shall also apply to this item.
1202-3.6 MAINTENANCE OF ACCEPTED SEED STAND. The intent of this specification is to provide for maintenance of the new growth of grass beyond the date of grass stand acceptance. During the maintenance period, which is from the date of the grass stand acceptance to the date of acceptance of the contract for final payment, the grass stand shall be mowed, watered, fertilized, and/or protected from damage by erosion, traffic, or weeds in order to maintain a healthy regrowth of grass in the seeded area. This maintenance shall be paid for under a separate bid item from the seeding.
1202-4 MEASUREMENT AND PAYMENT
1202-4.1 SEEDING CLASS I. Seeding Class I shall be measured by the square yard (SY) and paid for at the unit price bid for "Seeding Class I" complete in place and accepted by the ENGINEER.
1202-4.2 SEEDING CLASS II. Seeding Class II shall be measured by the square yard (SY) and paid for at the unit price bid for "Seeding Class II" complete in place and accepted by the ENGINEER.
1202-4.3 SEEDING CLASS III. Seeding Class III shall be measured by the square yard (SY) and paid for at the unit price bid for "Seeding Class III" complete in place and accepted by the ENGINEER.
1202-4.4 SEEDING CLASS IV. Seeding Class IV shall be measured by the square yard (SY) and paid for at the unit price bid for "Seeding Class IV" complete in place and accepted by the ENGINEER.
1202-4.5 SEEDING CLASS V. Seeding Class V shall be measured by the square yard (SY) and paid for at the unit price bid for "Seeding Class V" complete in place and accepted by the ENGINEER.
1202-4.6 SEEDING CLASS VI. Seeding Class VI shall be measured by the square yard (SY) and paid for at the unit price bid for "Seeding Class VI" complete in place and accepted by the ENGINEER.
1202-4.7 GRASS MAINTENANCE. Grass Maintenance shall be measured by the lump sum (LS) and paid for at the unit price bid for "Grass Maintenance" complete in place and accepted by the ENGINEER.