733 Page 492733 SODDING
733.1DESCRIPTION
This work consists of preparing the ground surface and furnishing, transporting, placing, and fertilizing live sod.
733.2MATERIALS
The sod will consist of a dense, well rooted growth of Kentucky bluegrass or other specified grass native to the general locality of the project. The sod will be free from noxious weeds, objectionable grasses, weeds, and foreign materials. Peat sod will not be allowed. At the time the sod is cut, the grass will have a length of approximately 2 inches if longer than 3 inches, the grass will be cut to approximately 2 inches in length and the sod will have been raked free of debris. If the sod is in a dry condition so that it cannot be cut, rolled, loaded, and hauled to the job site, without crumbling or breaking, water will be applied in sufficient quantity to provide a well moistened sod to the depth to which it is to be cut. Water used on sod will be from municipal, domestic, or other sources known to be suitable for irrigation.
733.3CONSTRUCTION REQUIREMENTS
A.Cutting Sod: Sod will be machine cut into rectangular sections. The sections will be of uniform width. The sod will be cut to a depth of 3/4 inch or more so the dense root system will be retained and exposed in the bottom side of sod, and the sod can be handled without undue tearing or breaking. Sod will be rolled with the top growth inside. Sod strips which indicate crumbling, tearing, breaking, or loss of soil during the operations of cutting, transporting, or handling will not be acceptable. Sod will be laid in its final position within 36 hours after being cut. During the period between cutting and laying, the sod will be protected from damage. B.Preparing Surface for Sodding: The surfaces to be sodded will be constructed to the required cross section and contour and will be smooth, uniform, and free from stones, roots, and other undesirable foreign material. The surfaces will be undercut to sufficient depth below adjacent areas so the top of newly laid sod will be flush with any adjacent seeded or turfed areas and 1 inch below top of sidewalks, curbs, and other structures. Some trenching in of the areas to be sodded and some building up of the adjacent areas may be necessary. The adjacent areas will smoothly blend with each other, without sharp breaks in the contours. Immediately prior to placing the sod, the soil will be loosened and brought to a fine granular texture, to a depth of not less than 1 inch. Clods, lumps, weeds, rocks larger than 3/4 inch, and other undesirable materials will be removed. If the ground prepared for sodding is dry or hot, prewatering of the earth bed to a depth of 1 inch may be required prior to sodding. The earth bed will be allowed to dry sufficiently after watering to permit sod placement without tracking. 733 Page 493C.Rolling: While not generally required, rolling may be specifically ordered for any areas where an especially smooth and level surface is desired. D.Seasonal Limitations: Sodding will not be done between June 1 and August 1 without written authorization from the Region Engineer. E.Laying Sod: The sod on bridge berm slopes will be laid by hand in horizontal strips, beginning at the bottom of the slope and working upwards. In waterways, strips will be laid parallel to the flow. Each section of sod will join the adjacent sections without overlapping but will abut snugly against the section previously laid. End joints will be staggered, and open joints or gaps will be filled with sod cut to the proper size and shape. The top and bottom ends of sodded areas will extend at least 2 inches into the ground or ditch bottom. Other edges of sodded areas will be turned into the ground 2 inches and covered with a layer of topsoil, which will be compacted to conduct the surface water over the edge of the sod and blend the sodded areas into the adjacent finished grades. F.Fertilizing: Following sod installation and just prior to watering, fertilize the sod at the specified rate. G.Anchoring: On slopes steeper than 6:1 the sod will be anchored with 1 inch wide by 6 inches long U-shaped staples made from #11 or heavier ungalvanized steel wire. A minimum of four staples per sod strip in every other row will be used. In waterways, two staples will be placed in the upper end of each sod strip, in the end facing flow. Staples will be driven flush with the top of the sod. Additional staples required to obtain adequate anchoring will be placed as directed. H.Watering: After sod has been laid it will be watered to provide a moist condition throughout the thickness of the sod and well into the underlying soil bed. Sodded areas will be kept thoroughly moistened by sprinkling, as necessary, for four weeks after sodding. At the end of the four-week period, an inspection will be made to determine if the sod is alive and growing. If this cannot be determined, the Contractor will have the option of maintaining the sod until it can be determined, or replacing the sod. Such maintenance or replacement will be at the expense of the Contractor. Replaced sod will be watered as required for original sod at the expense of the Contractor. If it is determined at the end of the four-week period the sod is alive and growing, the Contractor will be relieved of the responsibility of maintaining the sod.
733.4METHOD OF MEASUREMENT
Sodding will be measured to the nearest square yard. Necessary resodding of areas damaged from causes beyond the control of the Contractor will be measured and added to the original quantity used. 733 Page 494Water will be measured as provided in Section 120. Fertilizer will be measured as provided in Section 731.
733.5BASIS OF PAYMENT
Sodding will be paid for at the contract unit price per square yard. Payment will be full compensation for preparing the earth bed, for materials, labor, equipment, tools, and incidentals necessary. Water will be paid for under the item water for vegetation. Fertilizer will be paid for as provided in Section 731. 734 Page 495734 EROSION CONTROL AND WATER POLLUTION CONTROL
734.1DESCRIPTION
This work consists of permanent and temporary measures to control erosion, sedimentation, and water pollution.
734.2MATERIALS
A.Water Pollution Control: Materials used in water pollution control work will conform to the requirements set forth in the contract. When work is ordered for which no provisions are contained in the contract, material requirements will be set forth in the agreement covering the additional work. B.Temporary Erosion Control: 1.Silt Fence: Silt fence will consist of a temporary vertical barrier of fabric attached to and supported by woven wire and wood or steel posts and entrenched into the ground. Only silt fence on the Department’s Approved Products List will be allowed. a.Woven Wire: Woven wire will be 26 inch wide, 14½ gauge and have six horizontal wires with 6 inch or 12 inch spacing of vertical stay wires. Woven wire is required for low flow silt fence installations. Woven wire is not required, unless specified in the plans or ordered by the Engineer, for high flow silt fence installations. b.Posts: The posts used will be steel T line posts with 5 foot minimum length or wood posts with 5 foot minimum length and 3 inch minimum diameter. 2.Erosion Control Wattles: Erosion control wattles will consist of weed free straw, excelsior, or coconut husk encased in ultraviolet degradable or biodegradable netting. Anchors for erosion control wattles will be wooden or other biodegradable stakes. Only erosion control wattles on the Department’s Approved Products List will be allowed. 3.Erosion Bales: Erosion bales will consist of hay or straw bales free of noxious weeds. Erosion bales with noxious weed contamination will be rejected and the Contractor will remove the contaminated bales from the project. 4.Erosion Bale Anchors: The erosion bale anchors will be as detailed in the plans. C.Permanent Erosion Control: 1.Erosion Control Blanket: When called for in the plans, erosion control blanket will be used to prevent erosion in ditches and on roadway slopes. The blanket will be installed in accordance with the plans. Only designated erosion control blanket on the Department’s Approved Products List will be allowed. 2.Turf Reinforcement Mat: When called for in the plans, turf reinforcement mat will be used to prevent erosion in ditches and on roadway slopes. The mat will be installed in accordance with the plans. Only designated turf reinforcement mat on the Department’s Approved Products List will be allowed.