HM Pacific Northwest Inc. 5/18/2023

I 1 lines, and crosswalks shall be laid out with a rope. Field layout for curves and I2 tapers shall use an 800' minimum length rope. The color of the material used 3 for preliminary spotting shall be white. Longitudinal marking shall be parallel 4 with the proposed line applied with a paint marker wand or other approved I 5 method, a minimum of 6 inches in length and wide enough so that a minimum 6 of two marks can be clearly seen at night under ordinary headlight conditions. 7 Refreshing of marks prior to striping shall be the responsibility of the Contractor. I 8 9 Personnel performing the field layout and preliminary spotting shall be proficient 10 in the practice of striping layout, including layout and preliminary spotting of 11 curves and tapers using a rope and paint wand, proper annotation on the 12 pavement of starts, stops, and changes in line type for pavement markings, and 13 an understanding of WSDOT Standard Plans and City Standard Drawings for 14 pavement markings. I15 16 Survey personnel performing the calculations, notes, and layout data shall be 17 on site to answer questions regarding the layout notes as the roadway is being I 18 spotted or shall perform the work. In the event a revision is required by the 19 Contracting Agency during field layout, either to correct errors in the notes or to 20 make minor revision noted in the ordinary progress of the work, field layout shall 21 be performed by the Contractor at the time. 22 23 All field layout and temporary pavement marking shall be completed during the I 24 same shift as the striping is obliterated by grinding or paving unless otherwise 25 directed by the Engineer. 26 Permanent pavement marking shall not begin until the layout is approved by the 27 Contracting Agency. Such approval shall not relieve the Contractor of I 28 responsibility for the accuracy of the field markings. 29 30 Payment I31 32 All costs associated with layout of temporary striping shall be included in the 33 associated bid items for pavement marking and shall be full pay for all labor, I 34 equipment, materials, and supervision utilized to perform the Work specified for 35 layout and preliminary spotting of pavement markings, including any 36 resurveying, checking, correction of errors, replacement of missing or damaged I 37 markings, and coordination efforts. 38 39 8-22.3(2) Preparation of Roadway Surfaces I 40 41 Section 8-22.3(2) is supplemented with the following: 42 i43 (******) 44 Apply materials to new HMA that is sufficiently cured according to the manufacturer's I 45 recommendation. Permanent paint marking material applied to new HMA require a 46 pavement cure period of at least 21 days. Permanent Type D marking material 47 applied to new HMA require a pavement cure period of at least 10 days. i48 I 2023 FEDERAL OVERLAY FEDERAL AID#STBGUL-2715(011) IWO03788 March 2,2023 SP-109