Laserfiche WebLink
16 <br /># <br />Description: <br />6 <br />Provide justification for need to require, request or provide incentives for <br />removal of downspouts. What is the benefit? <br />7 <br />Regarding the Bridge Alternative, reassess constructability of footings on <br />hillside, elevator costs, and the construction approach with respect to <br />launching the bridge into place. <br />8 <br />Add costs for land acquisition, temporary, and permanent easements <br />9 <br />Provide exhibits showing each of the alternatives in similar perspective. <br />e. Continued support as requested. <br />213.5. Modeling Runs: <br />a. Determine flow rate which will produce a flushing velocity in the sag of the <br />proposed HDD pipeline. Assumed to need 4.5 fps to re -suspend solids, which <br />is typical of force mains. <br />b. Determine impacts of lining pipes (CIPP assumed) to hydraulic capacity of <br />pipelines. <br />Version 3 <br />c. Follow-up to workshop: <br /># <br />Description: <br />1 <br />Interim Construction Period, 14 Storm Series. Model ESM Phase 1 <br />(with PSO3 replacement under construction, but not in use) using the <br />14 storm events series, PSO1, PSO2 and existing PSO3 connected, <br />and no Grand Avenue or LSO8 piping improvements. Identify how <br />many of the 14 storms result in street flooding and characterize those <br />storms in terms of return frequency. <br />2 <br />Post-PSO3 Replacement, 50-Year Storm Frequency, LSO8 Off. Model <br />ESM Phase 2 using the 50-year, 30-minute storm event for the single <br />SD replacement alternative(s), PSO3 disconnected (except <br />intersection drainage), no Grand Avenue and LSO8 piping <br />improvements, with LSO8 turned off and with PSO2 disconnected. <br />Can PSO1 handle the CSO overflows? Confirm if flooding occurs in <br />ESM area. <br />3 <br />Post-PSO3 Replacement, 100-Year Storm Frequency, LSO8 On. <br />Model ESM Phase 2 using the 100-year, 30-minute storm event for the <br />single SD replacement alternative(s), PSO3 disconnected (except <br />intersection drainage), no Grand Avenue and LSO8 piping <br />improvements, with LSO8 turned on, and with PSO2 disconnected. <br />Can PSO1 handle the CSO overflows? Confirm if flooding occurs in <br />ESM area. <br />4 <br />For Action Items #2 and #3, assess impacts of the 17`h Street <br />Interceptor at Broadway and at Lombard as a result of improvements <br />to Sewer M. - NO ACTION REQUIRED UNTIL NOTIFIED. <br />18 <br />4/29/14 <br />140 <br />