815Riprap and Slope Paving

814.03.10 Inspection. The completed shop coat shall be inspected by the Contractor for

thickness by means of elcometer or other approved magnetic detector thickness gauge. Detection of insufficiently coated sections sh all be marked and shall be coated over or touched up to establish the specified thickness. All areas of the finished system deficient in thickness shall be coated over with the acrylic latex top coat paint to establish the specif ied thickness. Excessive thickness in the application of any coating evid enced by mudcracking will be ca use for the aff ected area to be blast-cleaned and repainted. Where rejection is due to poor workmanship or deficiency in the qu ality of the work or materials, the Contractor may be required to blast clean the en tire defective sections of all previously applied materials prior to repainting. Inspection shall be done in the presence of an d to the satisfaction of the Engineer. The Engineer shall be provided acce ss to the work to allow for pr oper inspection of the cleaning and painting at both the fabricati on plant and the construction site.

814.04 Method of Measurement. Unless shown as a separate pay item in the proposal,

painting of metal structures or members will not be measured for separate payment and the cost thereof shall be incidental to and includ ed in the contract unit price(s) bid for other items.

814.05 Basis of Payment. When shown as a separate pa y item in the pr oposal, painting

of metal structures or members will be paid for at the contract lump sum price, which price shall be full compensation for completing the work. Payment will be made under: 814-A: Painting of Meta l Structure - lump sum 814-B: Painting of Description - lump sum SECTION 815 - RIPRAP AND SLOPE PAVING

815.01 Description. This work consists of furnishing and placing a protective covering

of erosion resistant material including geotex tile fabric, where shown on the plans for pier foundation protection, slope, or ditch protection. This work shall be in accordance with these specifications and in reasonably clos e conformity with the lines, grades and dimensions shown on the plans or established.

815.02 Materials. Materials for riprap and slope paving shall conform to the following.

Geotextile shall meet the requirements of Subsection 714.13. Aggregate for loose ripr ap, stone riprap for foundation protection, or that to be grouted shall consist of field stone, broken concrete, or rough, unhewn quarry stone as nearly rectangular in section as is practicable. The stone shall be dense, free of clay or shale seams, resistant to the action of air and wate r, and suitable in all other respects for the purpose intended. Quality requir ements for rock to be furnis hed under these specifications will come from a pre-approved source or be visually approved prior to use. Hydraulic cement concrete aggregates, unless otherwise specified, shall conform to the applicable requirements of Section 703. Cloth sacks for concrete riprap in bags shall be of suitable cloth or jute that will hold the concrete mixture without leakage when handled . The sacks shall be of uniform size and dimensions, approximately 19½ x 36 inches m easured inside the seams when the sack is laid flat. Sound reclaimed cloth sacks meeting the specified requirements may be used. Paper sacks for concrete riprap in bags shall be a polyester fiber type of scrim reinforced paper. The top and bottom of th e sacks shall have a pasted valve. When filled, they shall measure approximately 13 inches wide, 20 inches long, and five inches thick. Perforations shall be overall on one-inch cent ers with a diameter of 3/32 inch to 1/8 inch per hole. Each bag shall fill a space of approximat ely 0.71 cubic feet with 38 bags required per cubic yard. Pre-packaged riprap will be accepted on certification from the manufacturer. Stones for riprap, of the size specified, shall meet the requirements of Subsection 705.04. Material used for sediment control stone sh all be crushed stone or gravel meeting the requirements of Subsection 703.03 for Size No. 57.

815.03 Construction Requirements.

815.03.1 Construction Details. Prior to the construction of riprap or slope paving, the

slopes or ground surface shall be shaped to lines and grades indicated on the plans or directed, and shall be thoroughly compacted by the use of mechanical or hand tamps. Unless otherwise stipulated or directed, slope s shall not be steeper than the natural angle of repose of the material upon which riprap is to be constructed. The outer edges and the top of the riprap or slope paving where the construction terminates shall be formed so that the su rface of the riprap or slope paving will be embedded and even with the surface of the adjacent slope or ground, and the bottom of the riprap or slope paving shall be placed at least two feet below the natural ground surface unless otherwise directed. All riprap or slope paving shall be starte d at the bottom of the slope and constructed upward. No grout, bag riprap, or slope paving shall be placed during freezing weather or while there is frost on the ground. Prepackaged riprap in paper bags shall be immediately soaked with water after placement to ensure hydration of the cement. In hot or dry weather grout and bag riprap shall be kept moist and protected from the sun for at least three days after placing. Replacement will be required if the bags do not set up to form a solid mass. Slope paving shall be cured in accordance with the provisions of Subsection 815.03.7.4.

815.03.2 Installation of Geotextile. When required by the contract, geotextile shall be

placed in the manner and at locations shown on th e plans. The area to receive the geotextile shall be prepared to a relatively smooth co ndition free of obstruct ions, depressions and debris. The geotextile shall be placed loosely without wrinkl es or creases with the long dimension perpendicular to the channel. The strips shall be placed to provide a minimum overlap of 18 inches. Securing pins with washers shall be inserted through both strips of overlapped ge otextile at mid-point and no t greater than two foot intervals. Additional pins shall be installed throughout the geotextile as necessary to prevent any slippage. The geotextile shall be placed so that the upstream strip overlaps the down stream strip and the higher slope strip overlaps the lower strip. Each securing pin shall be pushed through the geotextile until the washer bears against the geotextile and secures it firmly. The geotextile shall be protected from contam ination and damage du ring installation and placement of the specified cover material. Ri prap shall not be dr opped from a height greater than three feet. Cont aminated geotextile shall be replaced, and damaged geotextile shall be repaired or replaced as dir ected at no cost to the Department. The geotextile shall be covered with a layer of the speci fied material within 14 calendar days after placement. Geotextile not covered within this time period shall be removed and replaced at the Contractor's expense if damage or deterioration is ev ident, as determined by the Engineer.

815.03.3 Loose Riprap. The stones shall be placed upon a slope not steeper than the

natural angle of repose of the slope material. The stones shall be laid with close joints. The courses shall be laid from the bottom of the bank upward with the larger stones being placed in the lower courses. Interstices sh all be filled with smaller stones and spalls.

815.03.4 Grouted Riprap. Grout for grouted riprap shall consist of one part of hydraulic

cement and three parts of approved sand thoroughly mixed with water to produce grout having a thick, creamy consistency. The stones shall be of the size designated in the bid schedule of the contract and shall be placed in the same manner as specified for loos e riprap. Care shall be taken during placing to keep earth or sand from filling the spaces between the stones. After the stones are in place, the spaces between them shall be completely filled with grout from bottom to top and the surf ace swept with a stiff broom.

815.03.5 Stone Riprap for Foundation Protection. Stone riprap for pier and abutment

protection shall range in size up to derrick stone and shall be graded from coarse to fine in such manner as to produce a minimum of voids. It shall be deposited where directed and stone deposited c ontrary to directions will be consider ed wasted and will not be paid for.

815.03.6 Concrete Riprap in Bags. Concrete riprap in cloth or jute bags shall consist of

Class "D" concrete in approved bags and placed in conformity with contract requirements. Each bag shall be filled with approximately one cubic foot of concrete, securely tied, and immediately placed in the work and lightly tr ampled to cause them to conform with the slope or section required with adjacent bags in place. Unless otherwise specified in the contract, the bagged concrete shall be packed in such a manner as to give a reasonably uniform thickness of approximately 12 inches and shall be lapped and staggered as directed. Pre-packaged riprap in paper bags shall be filled with kiln- dried mixtur e of hydraulic cement and sand, or cement, sand and gravel with a ratio of three parts sand or sand and gravel to one part hydraulic cement. The bags shall be placed to conform with the slope or required section and with adjacent bags in place. The bags shall be lapped and staggered as directed. When shown on the plans, pipe headwalls shall be constructed of concrete riprap in bags in accordance with these specifi cations and the plan details. In this construction, it is essential that the successive tiers are securely "k eyed" by lapping. The bags shall be lapped one-half their length, when practicable.

815.03.7 Slope Paving. Concrete slope paving shall be constructed in a single layer in

conformity with the design dimensions and details indicated on the plans.

815.03.7 1--Forms. Forms shall be wood or metal of sufficient strength to withstand the

pressure of the concrete without bulging. They shall be adequately and securely staked true to line and grade.

815.03.7 2--Mixing and Placing Concrete. Unless otherwise stipulated, the concrete used

in this construction shall be Class "C" Conc rete, mixed and placed in accordance with the provisions and requirements of Section 804, except that volume tric batching may be used. Mixers of less than one bag rated capacity shall not be used.

815.03.7 3--Finishing. After spreading, the concrete shall be tamped and puddled until it

is compact and sufficient mortar has been flus hed to the surface so that it can be finished smooth with a wooden float. All edges shall be neatly edged using an approved short radius sidewalk edge.

815.03.7 4--Curing. After the concrete has set sufficiently, the surface shall be protected

from premature drying by covering as soon as possible with a satisfactory material such as wetted burlap or wetted cotton mats and kept moist for a minimum of three days, or cured by other approved methods. Other approved methods include liquid membrane compound as set out in Subsection 713. 01.2 and applied in accordance with the provisions of Subsection 501.03.20, except that approved hand spray methods will be acceptable, and white polyethylene sheeting conforming to the requirements of Subsection 713.01.3 and applied in accordance with the provisions of Subsection 501.03.20. Both liquid membrane compound and polyethylene sheeting shall be ma intained in place and intact for a minimum period of three days.

815.03.7 5--Soil Sterilization . Prior to placing slope pavement, the areas beneath the

pavement shall receive soil sterilization treat ment as set out in Subsection 616.03.2.

815.03.8 Cleaning Up. Upon completion of the work, th e surface of the riprap or slope

paving shall be cleaned, surplus material and de bris removed and disposed of as directed, and the site of the work left in a neat presentable condition.

815.04 Method of Measurement. Loose riprap will be measur ed in square yards or tons,

as specified. Sediment control stone will be m easured by the cubic ya rd (LVM) or ton, as specified. The pay area will be determined by using the outside dimensions of the area covered as dir ected. Tons or fraction thereof will be determined by railway weights or other satisfactory and approved weighing met hods. Stone placed contrary to directions will not be paid for. Measurement or payment will not be made for gr out, and the cost ther eof shall be included in the compensation for grouted riprap. Concrete riprap in cloth or jute bags will be measured in cubic yards as the quantity received or manufactured at the site of the wo rk and acceptably placed in bags as required. From the amount received or manufactured at the site, there will be deducted all excess determined by the Engineer to have been wasted or placed to unauthorized dimensions. The cubic yards of pre-package riprap in paper bags will be determined from the actual count of bags placed and accepted based on 38 bags per cubic yard. Slope paving will be measured by the cubic yard computed using the dimensions shown on the plans. If authorized revisions are made in the finish grade or the configuration of the slope pavement, computa tions will be made consider ing the changed dimensions. Geotextile complete in place and accepted will be measured by the square yard of surface area covered. Any overwidth of material inst alled and additional material required for laps or sewing will not be measured. No separate payment shall be made for shipping, handling, storage, protection, fabrication, securing pins, or installation; the co st of which shall be included in the contract price for geotextile fabric.

815.05 Basis of Payment. Loose riprap, measured as prescribed above, w ill be paid for

at the contract unit price per square yard or ton. Sediment control stone, measured as prescribed above, will be paid for at the contract unit pri ce per cubic yard or ton. Grouted riprap, measured as pres cribed above, will be pa id for at the contract unit price per square yard. Concrete riprap in bags and concrete slope paving, measured as prescribed above, will be paid for at the contract unit price per cubic yard. Geotextile, measured as prescribed above, will be paid for at the contract unit price per square yard. Such payment shall be full compensation for completing the work. Payment will be made under: 815-A: Loose Riprap, Size - per square yard or ton 815-B: Grouted Riprap - per square yard 815-C: Concrete Riprap in Bags - per cubic yard 815-D: Concrete Slope Paving - per cubic yard 815-E: Geotextile under Description, Type * , AOS * - per square yard 815-F: Sediment Control Stone - per cubic yard or ton * When not designated, see Subsection 714.13. Section 816 Section 816 SECTION 816 - MAINTE NANCE PAINTING OF METAL STRUCTURES

816.01 Description. This work consists of furnishing all materials, equipment and labor

for the cleaning and painting of metal structur es. It shall include, unless otherwise provided in the contract, the preparation of metal surfaces, the application, protection and drying of the paint coatings, supplying all tackle, scaf folding and other essentials necessary to complete the work in accordance with the specifications and as specified on the plans.

816.02 Materials . The coating system selected for maintenance painting must be lead

free, VOC compliant and must be listed on the Department's APL under “Approved Coating Systems for Upgrading Existing Coatin gs by Maintenance Forces.” The coating system shall consist of three co ats as follows; an approved prim er coat paint, intermediate coat paint and a top coat paint. The substituti on of a primer, intermediate or top coat paint from one approved coating system to another is not permitted. The integrity of each approved coating system must be maintained. When the project requires the painting of both new and existing metal structures, the different painting systems selected shall be from the same manufacturer and shall have the same top coat color.

816.03 Construction Requirements.

816.03.1 Weather Limitations . Solvent base paint shall not be applied when the

surrounding air temperature is below 40°F. Waterborne paint shall not be applied when the surrounding air temperature is below 50 °F. Paint shall not be applied when the surrounding air temperature is expected to drop to 32°F prior to drying of the paint. Paint shall not be applied when the metal is hot enough to cause blistering or produce a porous film. Paint shall not be applie d when steel surface is less than 5°F above the dew point nor shall it be applied in rain, snow, wind, fog, mist or when, in the opinion of the Engineer, conditions are otherwise un satisfactory for the work.

816.03.2 Pollution Control During Surface Preparation And Repainting . Generated

debris must be confined to the immediate ar ea of the structure. Appropriate screens and barriers must be erected to protect pedestrian and vehicular traffic during waterblasting and painting operation. Overspray must be kept to a bare minimum.

816.03.3 Surface Preparation . Surface preparation will incl ude waterblasting the entire

surface followed by spot cleaning with hand t ools to remove any remaining loose or flaking paint or rust, dirt, oil, grease and/or other de leterious matter from the steel surface. Tightly bonded paint is not to be removed and it is not necessary to remove tightly bonded rust. In areas containing a heavy coating of oil, gr ease and/or deleterious material that cannot be cleaned by waterblasting, clea ning shall be performed using an environmentally sensitive biodegradable solvent. Brush or mop the so lvent on the surface with a rubbing action to loosen the film. Wipe off with a clean dry cl oth and then rinse by waterblasting. Repeat as necessary until clean. The cleanliness of the su rface shall be approved by the Project Engineer or a designated representative prior to beginning painting operations.

816.03.3 1--Waterblasting . The waterblasting unit must be capable of operating at

pressures up to 4,000 psi at a water flow rate up to 10 gpm. The unit must be equipped