- 668 - SECTION 803 -- TEMPORARY SEEDING
803.01 Description
1.Temporary seeding consists of furnishing and applying the appropriate seed as shown in Table 803.01, fertilizer as shown below and hydromulch.
2.Temporary seeding can be used on embankments or cuts that are temporary in nature, stockp iles of soil, and other places that require soil stabilization. These areas may be shown in the contract or as directed by the Engineer.
803.02 Material Requirements
1.The seed shall comply with the following requirements and shall be applied at the rates shown in Table 803.01. Table 803.01 Temporary Seed and Limitations Minimum Purity (%) Minimum Germination (%) Approved Broadcast Application Rate Oats: Jan. 1 - Aug. 31 80 80 96 lbs/acre (107 Kg/ha) Foxtail Millet: May 2 - July 15 80 80 25 lbs/acre (27 Kg/ha) Winter Wheat: Sept. 1 - Dec. 31 80 80 120 lbs/acre (134 Kg/ha) Annual Ryegrass Urban Areas: Jan. 1 - Dec. 31 80 80 50 lbs./acre (55 Kg/ha)
2.The seed for temporary seeding shall be delivered in bags and tagged with the purity and germination shown on the tag. Bulk seed may be used. Bulk seed shall have a cu rrent purity and germination test.
3.Fertilizer shall be required for temporary seeding. Rate of application of commercial fertilizer shall be: R a t e o f A p p l i c a t i o n Available Nitrogen (N2) 60 lbs/Acre 4. The hydromulch shall be select ed from the Depart ment’s Approved Products List categories Type HM2 or HM3.
803.03 Construction Methods
1.The work of temporary seeding shall be started within 24 hours and completed within seven calendar days following earth moving activities.
b.The Engineer may designat e other areas that are to be temporary seeded earlier than shown above. 2. Preparation:
a.The Contractor shall prepar e the seed bed to a minimum of 1-1/2 inch (38 mm) of loos e soil. This requirement is dependent upon soil type and may be altered at the directio n of the Engineer so that a lesser thickness of loose earth may be acceptable. Temporary Seeding 803.05 - 669 - 3. Application:
a.The Contractor shall appl y the slurry of hydromulch in accordance with Subsection 807.03.
b.The seed shall be mixed in the hydromulch slurry. c. The fertilizer shall be applied in accordance with Subsection 804.03.
d.If the temporary seed fails to sprout, develop a root system and produce vigorous growth, reseeding shall be required and shall be performed at the cont ractor’s expense.
803.04 Method of Measurement
1.Temporary seeding is measured by the acre of ground surface seeded. The areas will be calculated from surface measurements of the length and width.
2.The mulch and fertilizer will not be measured for payment, but shall be considered subsidiary to the item Temporary Seeding.
803.05 Basis of Payment
1.P a y I t e m P a y U n i t Temporary Seeding Acre (A) [Hectare (ha)]
2.The quantity shown in the c ontract includes the necessary additional temporary seeding due to anticipated phased construction in the contract.
a.Certain areas may require temporary seeding more than once, either because the Contractor dist urbs the area as a consequence of contract phasing or as directed by the Engineer.
1.If the re-seeding is a result of disturbance as directed by the Engineer or contract phasing, it will be paid for by the Department.
2.If the temporary seeding is disturbed through the Contractor's action contrary to contract requirements, the Contractor shall re- seed the disturbed area at no additio nal cost to the Department.
3.Payment is full compensation for all work described in this Section. - 670 - SECTION 804 -- FERTILIZING
804.01 Description
1.This work consists of furnishi ng and applying synthetic, organic or inorganic nutrients to the soil.
804.02 Material Requirements
1.Fertilizer bags shall have the fertilizer analysis attached and the DR Form 125 shall accompany bulk deliveries.
2.Fertilizer shall be a syntheti c, organic or inorganic product containing nitrogen, phosphoric acid, and potash in a recognized plant nutrient form.
3.Fertilizer shall be furnished a nd delivered in standard weight bags or bulk. Each bag shall be clearly mark ed with the analysis of the contents. Each bulk fertilizer delivery shall have a completed DR Form 125, "Fertilizer Certification". The bag analysis or DR Form 125 shall be provided by the supplier and given to the Engineer.
804.03 Construction Methods
1.The Contractor shall apply t he fertilizer uniformly with approved mechanical spreaders at the ra tes specified in the contract.
a.The fertilizer shall be applied prior to seeding and incorporated into the soil.
b.No fertilizer shall be used with in 50 feet from a wetland, lakes or streams.
2.Separate application of individual components may be required to achieve the specified application rate. Field blending will not be allowed.
3.The fertilizer shall be incorporat ed into the soil to a depth of not more than 3 inches (75 mm) with a disc, harrow, rake, or by other approved means before seeding or sodding.
4.The fertilizer for cover crop seed ing shall be incorporated into the soil to a depth of not more than 1 1/ 2 inches (38 mm) with a disc, harrow, rake, or by other approved means before cover crop seeding.
804.04 Method of Measurement and Basis of Payment
1.No measurement is required. This work will not be paid for directly but shall be considered as subsidiary to items that require fertilizer.
Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 702–703 of 1,048.