806ROLLED EROSION CONTROL PRODUCTS

806.1DESCRIPTION—This work is furnishing, placement, and maintenance of temporary and permanent

Rolled Erosion Control Products (RECP) of the types indicated.

806.2MATERIAL—

extended-term, and long -term temporary RECPs meeting the requirements of Tables A, B, C and D, respectively, and having a functional longevity of sufficient duration to allow establishment of permanent vegetation before RECP degradation. Provide manufacturer’s RECP specifications, product data sheets, and drawings. Submit for local approval by the Representative (i.e., at the District or project level) as specified in Section 106.02(a)2.c.

TABLE A Ultra-Short-Term Temporary RECP (3 Month Functional Longevity) Type Product and Material Description Slope Applications Channel Applications Machine Direction Tensile Strength (lb/ft)(1) Transverse Direction Tensile Strength (lb/ft) Material Thickness (in) Ground Coverage (%) Minimum Seed Germination Enhancement (%)(3) Material Mass (oz /yd2)(4) Maximum Slope (H:V)(6) Maximum Allowable C-Factor at Maximum Slope(5) Shear Stress (lb/ft2)(2) 1.A Mulch Control Netting - A photodegradable synthetic mesh or woven biodegradable natural fiber netting. 5:1 0.10 ≥ 1.0 ≥ 125 ≥ 10 ≥ 0.03 ≥ 3 200 ≥ 0.2 1.B Erosion Control Blanket Without a Net - Natural and/or polymer fibers mechanically interlocked and/or chemically adhered together. 3:1 0.10 ≥ 1.0 ≥ 125 ≥ 10 ≥ 0.30 ≥ 50 – ≤ 90 200 ≥ 10.0 1.C Single Net Erosion Control Blanket and Open Weave Textile - Processed degradable natural and/or polymer fibers mechanically bound together by a single rapidly degrading, synthetic or natural fiber net. 3:1 0.10 ≥ 1.5 ≥ 60 ≥ 20 ≥ 0.25 – ≤ 0.50 ≥ 50 – ≤ 90 200 ≥ 8 1.D Double Net Erosion Control Blanket - Processed degradable natural and/or polymer fibers mechanically bound together between two rapidly degrading, synthetic or natural fiber nets. 2:1 0.10 ≥ 1.75 ≥ 75 ≥ 40 ≥ 0.25 – ≤ 0.50 ≥ 50 – ≤ 90 200 ≥ 8

event in large-scale testing. An acceptable large-scale test method is ASTM D6460 or equivalent approved by the Representative.

in conjunction with pre-applied mulch material.

TABLE B Short-Term Temporary RECP (12 Month Functional Longevity) Type Product and Material Description Slope Applications Channel Applications Machine Direction Tensile Strength (lb/ft)(1) Transverse Direction Tensile Strength (lb/ft) Material Thickness (in) Ground Coverage (%) Minimum Seed Germination Enhancement (%)(3) Minimum Weight Per Unit Area (oz /yd2)(4) Maximum Slope (H:V)(6) Maximum Allowable C-Factor at Maximum Slope(5) Shear Stress (lb/ft2)(2) 2.A Mulch Control Netting - A photodegradable synthetic mesh or woven biodegradable natural fiber netting. 5:1 0.10 ≥ 1.0 ≥ 125 ≥ 10 ≥ 0.03 ≥ 3 200 ≥ 0.2 2.B Erosion Control Blanket Without a Net - Natural and/or polymer fibers mechanically interlocked and/or chemically adhered together. 3:1 0.10 ≥ 1.0 ≥ 125 ≥ 10 ≥ 0.03 ≥ 50 ‐ ≤ 90 200 ≥ 10.0 2.C Single Net Erosion Control Blanket and Open Weave T extile - Processed degradable natural and/or polymer fibers mechanically bound together by a single rapidly degrading, synthetic or natural fiber net 3:1 0.10 ≥ 1.5 ≥ 60 ≥ 20 ≥ 0.25 ‐ ≤ 0.50 ≥ 50 ‐ ≤ 90 200 ≥ 8.0 2.D Double Net Erosion Control Blanket - Processed degradable natural and/or polymer fibers mechanically bound together between two rapidly degrading, synthetic or natural fiber nets. 2:1 0.10 ≥1.75 ≥ 75 ≥ 40 ≥ 0.25 ‐ ≤ 0.50 ≥ 50 ‐ ≤ 90 200 ≥ 8.0

flow event in large-scale testing. An acceptable large-scale testing method is ASTM D6460 or equivalent approved by the Representative.

in conjunction with pre-applied mulch material.

TABLE C Extended-Term Temporary RECP (24 Month Functional Longevity) Type Product and Material Description Slope Applications Channel Applications Machine Direction Tensile Strength (lb/ft)(1) Transverse Direction Tensile Strength (lb/ft) Material Thickness (in) Ground Coverage (%) Minimum Seed Germination Enhancement (%)(3) Minimum Weight Per Unit Area (oz /yd2)(4) Maximum Slope (H:V)(6) Maximum Allowable C-Factor at Maximum Slope(5) Shear Stress (lb/ft2)(2) 3.A Open Weave Textile – an open weave textile composed of processed slow degrading natural or polymer yarns or twines woven into a continuous matrix. 2:1 ≤0.05 ≥ 2.0 ≥ 100 ≥ 40 ≥ 0.20 ‐ ≤ 0.40 ≥ 40 200 ≥ 11.0 3.B Erosion Control Blanket and Open Weave Textile - An erosion control blanket composed of slowly degrading polymer or natural fibers mechanically bound together between two slowly degrading synthetic or natural fiber nets to form a continuous matrix 1.5:1 ≤ 0.05 ≥ 2.00 ≥ 100 ≥ 40 ≥ 0.20 ‐ ≤ 0.50 ≥ 50 ‐ ≤ 95 200 ≥ 8.0

flow event in large-scale testing. An acceptable large-scale test method is ASTM D6460 or equivalent approved by the Representative.

TABLE D Long-Term Temporary RECP (36 month Functional Longevity) Type Product and Material Description Slope Applications Channel Applications Machine Direction Tensile Strength (lb/ft)(1) Transverse Direction Tensile Strength (lb/ft) Material Thickness (in) Ground Coverage (%) Minimum Seed Germination Enhancement (%)(3) Minimum Weight Per Unit Area (oz /yd2)(4) Maximum Slope (H:V) Maximum Allowable C-Factor at Maximum Slope(5) Maximum Shear Stress (lb/ft2)(2) 4.A An open weave textile composed of processed slow degrading natural or polymer yarns or twines woven into a continuous matrix. 1:1 ≤ 0.05 ≥ 2.25 ≥ 100 ≥ 40 ≥ 0.20 ‐ ≤ 0.40 ≥ 50 200 ≥ 20.0 4.B An erosion control blanket composed of processed slow degrading natural or polymer fibers mechanically bound together between two slow degrading synthetic or natural fiber nettings to form a continuous matrix. 1:1 ≤ 0.05 ≥ 2.25 ≥ 100 ≥ 40 ≥ 0.20 ‐ ≤ 0.50 ≥ 50 ‐ ≤ 95 200 ≥ 8.0

event in large-scale testing. An acceptable large-scale test method is ASTM D6460 or equivalent approved by the Representative.

in conjunction with pre-applied mulch material.

permanently reinforcing vegetation in applications where vegetation alone cannot provide sufficient protection against erosive forces. Provide manufacturer’s RECP specifications, product data sheets, and drawings. Submit for local approval by the Representative (i.e., at the Distric t or project level) as specified in Section 106.02(a)2.c.

TABLE E Permanent RECP(7) Type Product and Material Description Slope Applications Maximum Slope (H:V) Channel Applications Test Unvegetated Shear Stress (lb/ft2)(,2,3,4) Channel Applications Test Vegetated Shear Stress (lb/ft2)(3,4,5,6) Seeding Emergence Typical (%)(3) Machine Direction Tensile Strength (lb/ft)(4,6) Transverse Direction Tensile Strength (lb/ft)(4,6) Material Mass / Unit Area (oz /yd2)(4) Thickness Typical (in)(4) UV Stability Typical (%)(4,6,7) 5.A Turf Reinforcement Mat

composed of UV-stabilized nondegradable synthetic fibers, filaments, nets, wire mesh and/or other elements, processed into a permanent, three- dimensional matrix which may be supplemented with degradable components. 1:1 ≥ 2.0 ≥ 6.0 ≥ 250 ≥ 150 ≥ 150 ≥ 8.0 ≥ 0.25 ≥ 80 @ 500 hrs 5.B 1:1 ≥ 2.0 ≥ 8.0 ≥ 250 ≥ 175 ≥ 175 ≥ 8.0 ≥ 0.25 ≥ 80 @ 500 hrs 5.C 0.5:1 ≥ 2.0 ≥ 10.0 ≥ 250 ≥ 200 ≥ 200 ≥ 8 ≥ 0.25 ≥ 80 @ 1,000 hrs 5.D 0.5:1 ≥ 2.0 ≥ 12.0 ≥ 250 ≥ 325 ≥ 225 ≥ 8.0 ≥ 0.25 ≥ 80 @ 1,000 hrs 5.E(1) 0.5:1 ≥ 2.0 ≥ 12.0 ≥ 250 ≥ 1,500 ≥ 1,500 ≥ 8.0 ≥ 0.25 ≥ 90 @ 1,000 hrs 5.F(1) High Performance Turf Reinforcement Mat -A product composed of UV‐ stabilized, nondegradable, synthetic fibers, filaments, nets, wire mesh and/or other elements, processed into a permanent, three- dimensional matrix. 0.5:1 ≥ 2.0 ≥ 14.0 ≥ 250 ≥ 3,000 ≥ 3,000 ≥ 8.0 ≥ 0.25 ≥ 80 @ 3,000 hrs

calculated as the typical minus two standard deviations. Statistically, it yields a 97.7 percent degree of confidence that any samples taken from quality assurance testing will exceed the value reported.

minute flow events in large scale testing.

testing typically involves limited soil types and vegetative stands; therefore, it is recommended that an appropriate factor of safety be used in design and product selection (see Guidance Document for further information).

exceed the value reported.

minute flow events in large scale testing.

NOTE: TRMs are typically used in Hydraulic applications, such as high flow ditches and channels, steep slopes, stream banks, and shorelines, where erosive forces may exceed the limits of natural, unreinforced vegetation or in areas where limited vegetation establishment is anticipated.

of 8 inches.

length of 18 inches.

806.3CONSTRUCTION—As shown on the Standard Drawings and as follows:

of rocks or other obstructions that prevent the RECP from lying in direct contact with soil.

is not required for installation of Temporary RECPs.

follow installation directions of manufacturer. Drive staples or anchoring pins flush with soil surface.

4.a. Stakes / Staples. Install the RECPs 3 feet beyond the shoulder of the slope onto flat final grade. Secure roll end with a single row of stakes/staples on 1-foot centers.

4.b. Anchor trench. Excavate a 6 inch by 6-inch anchor trench. Extend the upslope terminal end of the RECPs 3 feet past the anchor trench. Use stakes or staples to fasten the product into the bottom of the anchor trench on 1-foot centers. Backfill the trench and compact the soil into the anchor trench. Apply seed and soil amendments to the compacted soil and cover with remaining 1foot terminal end of the RECPs. Fold product over compacted soil in anchor trench to overlap downslope material. Secure terminal end of RECPs with a single row of stakes or staples on 1foot centers.

4.c. Staple check. Construct a stake/staple check slot along the top edge of the RECPs by installing two rows of staggered stakes/staples 4 inches apart on 4-inch centers.

4.d. Single net product anchor trench. Excavate a 6 inch by 6-inch anchor trench. Position roll such that the leading end of the roll is downslope and upside down. Apply seed and soil amendments. Extend product 1 foot downslope of anchor trench and place material in anchor trench. Secure terminal end and material in anchor trench with staples at 1-foot intervals. Fill anchor trench with soil and compact. Apply seed and soil amendments to fill placed in anchor trench. Move remaining roll over and downslope of anchor trench and proceed unrolling RECP downslope. Fold material over anchor trench with the net side facing up.

5.a. Adjacent seams. Overlap edges of adjacent RECPs by 2 inches to 4 inches or by abutting products as defined by manufacturer. Secure seams or abutted rolls using stakes or staples.

5.b. Consecutive rolls. Shingle and overlap consecutive rolls 2 inches to 6 inches in the direction of flow. Secure staples through seam at 1-foot intervals.

5.c. Check seam. Construct a stake/staple check seam along the top edge of RECPs for slope application and at specified intervals in a channel by installing two staggered rows of stakes/staples 4 inches apart on 4-inch centers.

5.d. Slope interruption check slot. Excavate a 6-inch wide by 6-inch-deep trench. Secure product to the bottom of the trench. Fold product over upslope material and fill and compact the trench on the downslope side of check slot and seed fill. Continue rolling material downslope over trench.

6.a. Stakes / Staples. Install the RECPs 3 feet beyond the end of the channel and secure end with a single row of stakes/staples on 1-foot centers. Stakes/staples for securing RECPS to the soil are typically 6 inches long.

6.b. Anchor trench. Excavate a 6 inch by 6 -inch anchor trench. Extend the terminal end of the RECPs 3 feet past the anchor trench. Use stakes or staples to fasten the product into the bottom of the anchor trench on 1foot centers. Backfill the trench and compact the soil into the anchor trench. Apply seed and soil amendments to the compacted soil and cover with remaining 1foot terminal end of the RECPs. Secure terminal end of RECPs with a single row of stakes or staples on 1-foot centers.

6.c. Check slot. Construct a stake/staple check slot along the terminal end of the RECPs by installing two rows of staggered stakes/staples 4 inch apart on 4-inch centers.

of 1.3 per square yard within the body of the blanket. For the most effective RECP installation use stake / staple patterns and densities as recommended by the manufacturer. For adjacent and consecutive rolls of RECPs follow seaming instructions as specified in Section 806.3.(a).5. The terminal end of the RECPs installation must be anchored using one of the methods as specified in Section 806.3.(a).6.

entire width as specified in 806.3.(a).4. Follow the manufacturer’s installation guidelines in constructing additional anchor trenches or stake/staple check slots at intervals along the channel reach and at the terminal end of the channel, as specified in paragraph 806.3.(a).6. Unroll RECPs down the center of the channel in the primary water flow direction. Securely fasten all RECPs to the soil by installing stakes/staples at a minimum rate of 1.7 per square yard. Significantly higher anchor rates and longer stakes/staples may be necessary in sandy, loose, or wet soils and in severe applications. For adjacent and consecutive rolls of RECPs follow seaming instructions as specified in Section 806.3.(a).5. All terminal ends of the RECPs must be anchored using one of the methods as specified in Section 806.3.(a).6.

or the RECP placement as specified in Section 804.3. Soil surfaces to be free of rocks or other obstructions that prevent the RECP from lying in direct contact with soil.

placement. When seeding is required before RECP placement, place designated seed formula mixture as specified in Section 804.3. Mulch application normally associated with seeding operation is not required for installation of Permanent RECPs.

conform to the shape of and be in uniform contact with the soil surface. Use appropriate anchoring devices and follow installation directions of the RECP manufacturer. Drive staples or anchoring pins flush with soil surface.

formula mixture into the RECP matrix as specified in Section 804.3. After seeding, uniformly place 1/2 inch to 3/4 inch of approved topsoil on the RECP. Work soil into RECP voids to completely fill the RECP matrix flush with top of the RECP. Remove excess topsoil.

slope, swale, or other soil surface failure occurs after installation of work, redress affected soil areas and reinstall protection material as specified for original treatment, unless directed otherwise.

806.4MEASUREMENTS AND PAYMENT—

For the type indicated.

For the type indicated.

For the type indicated.

For the type indicated.

For the type indicated.