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Material (700-799)

737GEOCELL

PA · 2026 Standard SpecificationsBook pages 747747View official source ↗

805.3(a) 805.3(e)

• Nonasphaltic emulsion —At manufacturer's recommended rate

• Polyvinyl acetate —At manufacturer's recommended rate

• Recycled cellulose fiber/wood fiber mixture —160 pounds per 1,000 square yards

The mulch binder application is incidental to the application of straw and hay mulch. Apply wood fiber mulch hydraulically according to the manufacturer's tank -mixing instructions. It may be incorporated as an integral part of the slurry after the seed and soil supplements have been thoroughly mixed. Apply uniformly at the rate of 320 pounds per 1,000 square yards unless otherwise indicated. Mulch temporary seeded areas with hay.

1.Median Areas. On slopes 6:1 or flatter, place pellet mulch by hand or using a mechanical spreader

immediately after seeding. Apply uniformly at application rate of 540 pounds per 1,000 square yards. Thoroughly wet pellet mulch with water without dislodging mulch.

(b)Mulch Control Netting.
1.Plastic. Install netting over designated mulch surface. Staple upslope ends, edges, bottom, and

overlaps at 24- inch intervals. Overlap adjacent fabric to outside edges. Secure remaining fabric areas by putting in approximately 1 staple per 1 square yard of area.

2.Coconut Coir. Install netting over designated mulch surface. Stretch fabric tightly and anchor with

wood stakes along all edges at 7- foot maximum interval. Overlap adjacent fabric widths by not less than 8 inches.

(c)Mulching Planted Areas.
1.Individual Plant Pits. Uniformly apply a designated mulch specified in Section 805.2(a)2 to the

entire plant pit to a loose depth of 3 inches and as shown on the Standard Drawing. Apply mulch within 48 hours after completion of the planting operation.

2.Planting Beds. Cover designated shrub beds with mulch or mulch and weed barrier mat or mulch

and weed control mat as indicated. Cut mat around the plant stem to ensure mat will not extend above the mulch. Secure mat to the soil surface with staples or other approved anchoring devices at a maximum interval spacing of 3 feet and along all edges and overlaps. Overlap mat edge with 2- inch minimum. Uniformly apply a designated mulch specified in Section 805.2(a)2 over the entire bed area to a loose depth of 3 inches. Redistribute excessive mulch depth. Taper mulch depth at plant pit as shown on the Standard Drawing. Apply mat and mulch within 48 hours after completion of the planting operation.

(d)Maintenance. Properly maintain mulched areas until the entire project has been completed. Promptly

reapply mulch materials, which become dislodged or lost because of wind, rain, or other causes, at initial or modified rates, as directed. After mulching work on a slope has been satisfactorily completed, if a slope failure occurs, on

Source: Pennsylvania Department of Transportation Specifications, 2026 Edition. Pages 747747 of 1,522.