1629COIR FIBER MAT

No payment will be made for temporary slope drains that were required due to the Contracto r's negligence, carelessness or failure to install permanent controls as a part of the work scheduled. Temporary Slope Drains will be considered minor items. Article 104 -5, pertaining to revised contract unit prices for overrunning minor items , will not a pply to these items. Payment will be made under: Pay Item Pay Unit Temporary Slope Drains Linear Foot

COIR FIBER MAT -1 DESCRIPTION Furnish material, install and maintain coir fiber mat in locations shown on the plans or in locations as directed by the Engineer. Work includes providing all materials, excavating and backfilling, and placing and securing coir fiber mat with stakes, steel reinforcement bars or staples as directed by the Engineer . -2 MATERIALS Refer to Division 10. Item Section Coir Fiber Mat 1060-14 Staples 1060-8(D) Stakes, reinforcement bars or staples shall be used as anchors . Provide hardwood stakes 12 inches to 24 inches long with a 2 inch x 2 inch nominal square cross section. One end of the stake shall be sharpened or beveled to facilitate driving through the coir fiber mat and down into the underlying soil. The other end of the stake shall have a 1 inches to 2 inches long head at the top with a 1 inch to 2 inches notch following to catch and secure the coir fiber mat. Provide uncoated #10 steel reinforcement bars 24 inch nominal length. The bars shall have a 4 inch diameter bend at one end with a 4 inch straight section at the tip to catch and secure the coir fiber mat. -3 CONSTRUCTION METHODS Place the coir fiber mat imm ediately upon final grading. Provide a smooth soil surface free from stones, clods, or debris that will prevent the contact of the mat with the soil. Unroll the mat and apply without stretching such that it will lie smoothly but loosely on the soil surfac e. For stream relocation applications, take care to preserve the required line, grade and cross section of the area covered. Bury the top slope end of each piece of mat in a narrow trench at least 6 inches deep and tamp firmly. Where one roll of matting ends and a second roll begins, overlap the end of the upper roll over the beginning of the second roll so there is a 6 inch overlap. Install staple checks at 30 feet intervals or as directed by the Engineer. Fold over and bury mat to the full depth of the trench, close and tamp firmly. Overlap mat at least 4 inches where 2 or more widths of mat are installed side by side. Place anchors across the mat at the ends on 10 inch centers. Place anchors down the center of the mat 3 feet apart. Adjustmen ts in the trenching or anchoring requirements to fit individual site conditions may be required by the Engineer .