01090.40 1009 Section 01090 - Gravel Beds and Blankets Descript ion
01090.00 Scope - This Work consists of preparing areas for G ravel beds and Gravel blankets, and
furnishing and placing Soil sterilant, weed control geotextile, and G ravel bed Aggregates or Gravel blanket Aggregate s at locations shown or directed. Materials
01090.10 Soil Sterilant - Furnish products with current legal labels listing active ingredients, which
may include simazine, diuron, bromacil, sulfometuron-methyl, or from the QPL. Submit a sample of the proposed Soil sterilant's registered label to the Engineer for approval before using.
01090.11 Weed Control Geotextile - Furnish the following weed control geotextiles:
3 ounce, UV stabilized, nonwoven, polypropylene fabric 3.75 ounce, UV stabilized, needle-punched, polypropylene fabric Weed control geotextile from the QPL
01090.12 Aggregates - Furnish clean, uncrushed, nearly round Rock for Gravel beds and G ravel
blankets meeting the following gradation requirements: Gravel Bed Gravel Blanket Sieve Size 3/4" - 1/2" 1 1/2" - 1/2" Percent Passing (by Weight) 2" 100 1 1/2" 80 - 100 1" 100 0 - 15 3/4" 80 - 100 − 1/2" 0 - 10 0 - 5 The Engineer may accept Aggregate s by visual inspection. Construction
01090.40 General - Prepare Gravel bed and G ravel blanket areas, and furnish and place Soil
sterilant, geotextile, and Aggregate s as follows:
a.Excavation - Excavate and shape the areas for G ravel beds and Gravel blankets as shown or directed and according to Section 00330.
b.Soil Sterilant - Furnish and place the approved Soil sterilant at a rate of application recommended by the m anufacturer. During use of Soil sterilant strictly adhere to label cautions, especially those concerning existing plants or waterways in the immedi ate area.
c.Geotextile - After the area has been treated with Soil sterilant, place the weed control geotextile over the prepared ground surface according to 00350.41(a). Extend or lap the geotextile as follows: • Gravel Beds - Extend the geotextile approximately 2 inches up the sides of the bed and overlap at least 12 inches. 01090.80 1010 • Gravel Blankets - Lap the ends of the sheets 18 inches and the sides 12 inches.
d.Aggregates - Place Aggregate cover as follows: • Gravel Beds - Cover the geotextile with G ravel bed Aggregates to the depth specified then level and roll with a water -filled landscape roller for a minimum of two complete C overages. • Gravel Blankets - Cover the geotextile with G ravel blanket Aggregates to the depth specified or directed. Measurement
01090.80 Measurement - The quantities of G ravel beds will be measured on the volume basis.
The quantities of G ravel blankets will be measured on the area basis by surface measurement of the Material in place, limited to the established Neat Lines and grades as shown or directed. Payment
01090.90 Payment - The accepted quantities of G ravel beds and Gravel blankets will be paid for at
the Contract unit price, per unit of measurement, for the following items: Pay Item Unit of Measurement
a.Gravel Beds ..................................................................................... Cubic Yard
b.Gravel Blanket ................................................................................ Square Yard Payment will be payment in full for furnishing and placing all Material s, and for furnishing all Equipment , labor, and Incidental s necessary to complete the Work as specified. No separate or ad ditional payment will be made for excavation, Soil sterilant, or weed control geotextile.
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Source: Oregon Standard Specifications for Construction, 2024 Edition. Pages 1075–1076 of 1,268. View official source ↗