Granite Construction Company 5/1/2018

1 1 2 Al! areas of the deck that are inaccessible to the selected scarifying machine shall be 1 3 scarified to remove the concrete surface matrix to a maximum nominal scarification 4 depth shown in the Plans by a method acceptable to the Engineer. 5 I 6 This section is supplemented with the following: 7 8 Concrete process water generated by scarifying concrete surface and removing existing I 9 10 concrete overlay operations shall be contained, collected, and disposed of in accordance with Section 5-01.3(11) and Section 6-09.3(5)C, and the Section 6-09.3(2) 11 Runoff Water Disposal Plan. I 12 13 6-09.3(5)B Testing of Hydro-Demolition and Shot Blasting Machines 14 This section's title is revised to read: I 15 16 Testing of Hydro-Demolition Machines 17 18 The second paragraph is revised to read: I 19 20 In the "sound" area of concrete, the equipment shall be programmed to remove 21 concrete to the nominal scarification depth shown in the Plans with a single pass of the I 22 machine. 23 24 6-09.3(5)D Shot Blasting I 25 This section, including title, is revised to read: 26 27 6-09.3(5)D Vacant 1 28 29 6-09.3(5)E Rotomilling 30 This section, including title, is revised to read: I 31 32 6-09.3(5)E Removing Existing Concrete Overlay Layer by Rotomilling 33 When the Contractor elects to remove the upper layer of existing concrete overlay, I 34 when present, by rotomilling prior to final scarifying, the entire concrete surface of the 35 bridge deck shall be milled to remove the surface matrix to the depth specified in the 36 Plans with a tolerance as specified in Section 6-08.3(5)B. The operating parameters of I 37 the rotary milling machine shall be monitored in order to prevent the unnecessary 38 removal of concrete below the specified removal depth. 39 40 6-09.3(6) Further Deck Preparation I41 The first paragraph is revised to read:: 42 43 Once the lane or strip being overlaid has been cleaned of debris from scarifying, the 1 44 Contractor, with the Engineer, shall perform a visual inspection of the scarified surface. 45 The Contractor shall mark those areas of the existing bridge deck that are authorized by 46 the Engineer for further deck preparation by the Contractor. I 47 48 Item number 4 of the second paragraph is deleted. 49 I 50 The first sentence of the third paragraph is deleted. 51 52 6-09.3(6)A Equipment for Further Deck Preparation I53 This section is revised to read: HOT MIX ASPHALT OVERLAY-2018 PAGE 19 OF 53 • March 6,2018 I WORK ORDER#3667 AMENDMENTS TO STANDARD PROVISIONS