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• iii iiiiiiiiniu iii • <br />999 <br />BULL SEEP <br />MEETING MINUTES <br />NOVEMBER 28, 2001 2:00 PM <br />MINUTES <br />Attendance: (SEE ATTACHED LIST) <br />Location: Urban Drainage & Flood Control Disvict Boazd Room <br />Time: 2:00 PM <br />Date: Wednesday, November 28, 2001 <br />Meeting Minutes: <br />1. An attendance list was passed around. Bryan Kohlenberg (UD&FCD) and Craig <br />Jacobson (ICON Engineering) mentioned that comments on the Meeting Minutes <br />from November 13`~ have been received and revised minutes will be sent out shortly. <br />2. John Hickman (Lafarge) provided an update of the project activities. He mentioned <br />that Lafarge and McIntosh Farms have reached an agreement in principal for an <br />easement on the McIntosh property. John added that he had received comments on <br />the last meeting from Bryan Kohlenberg (UD&FCD), Rick Anderson (Adams <br />County), Jessica Bazbier (Denver Water), Tiffany Snyder (Commerce City), and Scott <br />Franklin (USACOE). Many of the comments focused on channel armoring and bank <br />protection, access to the conservation easement and Brantner diversion structure, <br />sizing of the Bull Seep channel south of the gas line, and issues concerning the impact <br />of construction on the existing trees. As a result of the comments and new <br />circumstances, adjustments were made to the overall drainage plan. <br />3. John Hickman continued with a discussion of the two new drainage plan alternatives. <br />One plan proposed the installation of a First Creek overflow spillway from Reservoir <br />B and a 4,800-cfs drainage channel to the South Platte River. This alternative <br />required a channel section approximately 300-feet wide. The second alternative <br />removed the overflow spillway and proposed a 2,000-cfs channel to pass potential <br />breach Flows from the South Platte River. The bottom width associated with this <br />alternative would be approximately 150-feet, half of the first alternative. John <br />indicated that there would be a potential to construct the 2,000-cfs channel in a first <br />stage. Then, at a later date, expand the drop structure and channel to pass the entire <br />4,800-cfs, once the spillway is constructed. <br />4. John Hickman mentioned that they proposed to set the crest elevation at the Bull Seep <br />Slough drop at elevation 5023, as opposed to 5025 originally proposed by ICON. <br />Chris Lidstone (Lids[one & Associates) added that they had analyzed the UD&FCD <br />cross-sections from the January 2001 Denver Water 1-foot topographic mapping. <br />Additionally, he said that he had visited the site to determine the field conditions <br />predating the May event. His survey indicated that the typical historic channel level <br />was around elevation 5026.94. The current bed elevation was 5022.5. Chris <br />continued to mention that this elevation (5023) was consistent with the January 2001 <br />elevation shown for Cross-Section #4 on the UD&FCD plans (prepared by ICON). <br />C:~~14'I\~IXI~ti'S'~,I I_V_P\I_I-'_S ns~tinG.dncW{'-W}ll_2'+#+ul?drk~:1..~4 ~n--.;,~.,.., w-rk~ <br />