Minutes-9/1/2016

Doug To: Benjamin A. Carhoff Subject: RE: Trail walk-thru From: Benjamin A. Carhoff [mailto:[email protected]] Sent: Wednesday, October 26, 2016 3:21 PM To: [email protected] Cc: Jack Burnham Subject: Trail walk-thru Tom Applegate and another Metro employee met with Jay, Mike and I at 10:30 this morning. Jay ran the video camera. I believe the second Metro employee is the equipment/paving machine operator. The trail surface was moist and puddles and standing water could be seen clearly. Both of Metro’s representatives saw the “chains of puddles” along the left side of the trail. They saw and confirmed the “ridge” that we have been talking about. They stated the likely cause is from the finishers. They could also see that the “ridge” is holding water on the trail. Grinding the “ridge” will likely solve the “chain of puddles” issue. Metro will remove the “ridge” by grinding the edge of the slab. Near the first manhole there was waster standing on the trail. Measurements were observed. It is difficult to describe the slope issues. The design slope is 1% to the left. The area either has slope to the right or an artificial crown that keeps water on the trail or a combination of those with smaller areas that do slope to the left, slightly. There is also a large puddle in the middle of the slab in two places that was caused (most likely) by a delay in the rotation of delivery trucks and the finishers were unable to remove the depression with the floats and hand tools. There is a large grassed area on the right side of the trail that is trying to drain to the left side and the left side does not drain away well. Metro will replace 4 slabs in this area (due to the mid-slab puddles, mainly) and perform additional grading to drain water away from the pavement The second area for possible replacement is near the wide curve after the narrow wetland passage, approx. Sta. 8+00. This is near the location that trucks used to turn around on the first day of paving. Here the design slope was to be 1% left. The constructed slope is very flat and water pools along the right edge. The puddle is caused by the slumped right edge of the trail. The operator stated they had trouble in that area. Metro will first try grinding the slab to get water to drain to the left. If that fails, Metro will replace the 3-4 slabs. Metro will replace the slabs at the box culvert which are steeper that ADA requirements. At the south side of the burn pile access, water most drain from the left side to the right side. The “ridge” is impeding flow. The “ridge” will be removed by grinding. North of the access there is one spot that puddles. The “edge” will be removed by grinding. The other possible ADA issue (tenth panel east of the truncated dome panel at Ireland Ave.) was measured. The panel was flagged by the spread sheet and it was found that the elevation of the slumped edge influenced the calculation in the spreadsheet. The slab has a slope of 1.9% which is compliant with ADA. At this point I am waiting for Metro to schedule the remedial work. The operator stated that he will need to make more precise measurements so the grinding can be performed without damaging the remaining pavement by grinding too much.