415 RIVERSIDE RD 2019-02-14 - Laserfiche WebLink

Updated figures and tables without the redlined text are included at the end of Amendment 2. Below is a description of the major modifications made to the affected figures: • Figure 2 - Developed Conditions Basin Map (Ponds). Pond#2 Available Capacity For Water Quality, Table is updated to cross out and reclaim water quality capacity in Pond 2; Site plan exhibit is modified accordingly to the table revisions together with the general notes. • Figure 2A - Developed Conditions Lot Drainage Planning Information. Tables for Lots 4, 5, 8 and 8th Street are modified to match the drainage concept; Site plan exhibit is modified accordingly to the table revisions together with the general notes. • Figure 15 - Developed Conditions Basin Map (Pumps). Tables for Pumps 1 through 4 are modified to strike out drainage flow allowances to Lots 4, 5 and 8 to match the drainage concept; Site plan exhibit is modified accordingly to the table revisions together with the general notes. • Figure 15A - Developed Conditions Drainage Concept Lots 2 & 4. Site plan exhibit is modified to include removal of stormwater runoff from Riverside Road overpass to claim Pump 1 capacity; Includes 8th Street drainage and drainage stub for Lot 5 drainage conveyance to the Snohomish River through existing 8" & 12" outfalls retrofitted with in situ liner; Reduction of Lot 8 drainage basin to Water Quality Pond 2. • No modifications were made to Preliminary calculations for pipe sizing and backwater analysis. Information from these calculations was not updated, rather it was used to prepare and summarize corroboration information presented in this amendment. Descriptions of the new figures introduced in this Amendment 2 are noted below: • (New) Figure 16 —RBP 100-YR Flow and Pump Capacities—Rational Method. This table summarizes the adjusted calculated flows and notes the pump capacity available to convey the flows to the pond. Riverside Business Park Apri112,2017 �- KPFF,Amendment 2 (Pae>/7/)