Section 223 Section 223 accordance with Subsectio n 105.01 of the Standard Specifications.
223.03.2 Equipment. Equipment used for mowing operations shall be of sufficient
size, type and condition to perform the work satisfactorily. Mowers may be rotary, flail, sickle or combination thereof as necessary to efficiently accomplish the work. Rotary mowers shall be equipped with safety chains or other devices to prevent flying stones, rocks, cans, etc. from striking persons or property. Change or adjustment of the equipment or operator may be required if at any time during the mowing operation, the Engineer determines that the equipment, or operators of the equipment, are not performing satisfactorily. When required for the Contractor’s mowing operations, appropriate traffic control devices shall be installed in accordance with the MUTCD.
223.04 Method of Measurement. Mowing will be measured by the acre. Litter
removal and any required traffic control devices will not be measured for separate payment, but will be included in the fixed contract price for mowing.
223.05 Basis of Payment. When ordered by the Engineer, mowing will be paid for at
the fixed contract unit price per acre indicated in the bid schedule, which price shall be full compensation for removing and disposing of litter, all equipment, tools, labor, traffic control devices and incidentals n ecessary to complete the work. Payment will be made under: 223-A: Mowing - per acre SECTION 224 - SOIL REINFORCING MAT
224.01 Description. This work consists of furnishing, placing and maintaining a soil
reinforcing mat on seeded or other designated areas in accordance w ith the requirements of the plans and these specifications.
224.02 Materials.
224.02.1 Preformed Permanent Mat. The soil reinforcing mat must be one from the
Department's current APL. The Contractor will be permitted to furnis h and install a multi-width mat with seams securely bonded by welding, stitching or other methods meeting the approval of the Engineer.
224.02.2 Stakes. Unless otherwise specified by the manufacturer of the soil reinforcing
mat, stakes used to secure the mat shall be either:
1.sound 3/4-inch by 2½-inch by 15-inch minimum, triangular shaped, wood stakes,
2.3/16-inch by 18-inch metal pins with 1½-inch round metal washer, or
3.double prong "U" shaped wire staples made from 9-gauge or heavier steel wire with an approximate length of eight inches after bending.
224.02.3 Acceptance Procedure . Prior to use, the Contractor must furnish the Engineer
three copies of the manufactur er's certification for each ship ment of soil reinforcing mat material stating the number of rolls furnished and that the material in the shipment conforms to the same composition as that originally approved by the Department. When metal pins or wire staples are used, also furnish the Engineer three copies of a certification from the manufacturer or distributor stating the pin and washer size for metal pins or wire size for staples for each shipment. The certifications by the manufacturer or di stributor will be prima facie evidence of the materials meeting the require ments of the specifications.
224.03 Construction Requirements.
224.03.1 General. The area(s) to be covered shall be prepared, fertilized and vegetated
as specified in accordance with the require ments of the contract before the mat is installed. The planted area shall be to finish grade, smooth, and free of stones, clods, or trash. The vegetative mulch material shall be omitted from areas receiving the mat. The mat shall be installed immediately following the planting operations. The installation of the mat material shall be perfo rmed in accordance with the re quirements specified herein and the installation detail sheet in the plans. Terminal slots, both upstream and downstre am, shall be excavated a minimum of twelve inches deep and two feet wide across the fu ll width of each area to be treated before placing the mat. Transverse check slots shall be excavated a minimum of nine inches deep and six inches wide across the full width of the area to be treated at approximat ely 25-foot intervals along the entire length of the area. Outer edge slots shall be excavated four inches deep by six inches wide along the actual perimeter of the mat installation for the full length of the area to be treated. When possible, the mat installation shall begin at the downstream end and unrolled uphill in continuous contact with the soil. When tw o or more widths of mat are required to cover an area, they shall overlap a minimum of three inches. In cases where rolls are to be spliced lengthwise, the ends of the roll s shall overlap three feet minimum with the upgrade strip on top. Temporary staking shall be required to place tension on the mat at crest of check slot for securing mat into slot and for proper alignment during installation. The mat material shall be secured across the full width of the mat with stakes one-foot apart in all terminal, downstream and upstream, and transverse check slots. The stakes shall be placed three feet apart, with the diagonal edge facing upstream when using wood stakes, on outer edge slots, longitudinal overlaps and bonded seams on multi-widths. For longitudinal overlaps, one stake shall serve the overlapped edges of adjoining strips. The center of each strip including each strip between each bond, if multi- width rolls are used, and the center of ditch bottom shall be staked at six-foot intervals with the stakes placed broadside to the stream flow. When the center of a strip or the longitudinal overlap, including a bonded seam, falls within six inches of the center of ditch, the required ditch bottom stakes may be omitted. Where the rolls of mat are spliced lengthwise, the three- foot overlap shall be staked with two rows of stakes 30 inches apart with the stakes spaced approximately 18 inches apart in each row. Wood stakes shall be driven to within approximately two to three inches of the ground surface. When metal pins are used, they sha ll be firmly embedded in the underlying soil with the attached washers flush with the gr ound surface. When wire staples are used, they shall be driven flush with the ground surface. After the mat is placed and staked into all slot s, the slots shall be backfilled with soil and compacted to the satisfaction of the Engineer. Consideration may be given by the Engineer to the use of alternate staking procedures when submitted by the Contractor upon recommendation of the manufacturer of the soil reinforcing mat and at least seven days prio r to the proposed installation of the mat.
224.03.2 Protection and Maintenance . The Contractor shall maintain and protect the
soil reinforcing mat until release of maintenance. Maintenance shall consist of repairs made necessary by erosion, wind, or any other cause.
224.04 Method of Measurement. Soil reinforcing mat will be measured by the square
yard of surface area covered. The additional mat material required for overlaps, slots and overwidth of strips will not be measured for payment.
224.05 Basis of Payment. Soil reinforcing mat, measured as prescribed above, will be
paid for at the contract unit price per square yard, which price shall be full compensation for completing the work. Payment will be made under: 224-A: Soil Reinforcing Mat - per square yard SECTION 225 - GRASSING
225.01 Description . This work consists of furnishing, transporting, placing, plant
establishment, and all work, including grou nd preparation, fertilizing, seeding, and mulching, necessary to produce a satisfact ory and acceptable growth of grass. At the Contractor’s option, seeds and mulch may be incorporated using a hydraulically applied method under certain limitations. When hydraulically applied, it shall be performed in accordance with th e requirements and methods addressed in Section 227. Under no circumstances shall fertilizer be incorporated hydraulically.
225.02 Materials.
225.02.1 Fertilizers . Fertilizers for purposes of this specification shall be understood to
include standard manufactured products consisting of single or combination ingredients and agricultural limestone.
Source: Mississippi Standard Specifications for Road and Bridge Construction, 2017 Edition. Pages 165–166 of 1,113.