09/10/2025 PZ Combined Packet - Laserfiche WebLink

Home Search

Ms. Katie Larsen 09/04/2025 Page 4 being completed by Water in Motion and will be supplied to the City and VLAWMO for review. WSB Response (8/6/2025) – Noted, please provide water reuse report when available. 4.The steepest allowable slope below the 10’ aquatic bench is 3:1. Current grading of 2:1 is too steep and must be revised. ISG Response (6/9/2025) – Grading below the aquatic bench was revised to 3:1 slopes. WSB Response (6/20/2025) – Comment addressed. 5.The outlet pipe for Basin 1 must be submerged at least 1’ below the NWL. a.Considering this basin is intended for irrigation reuse, the outlet pipe should be set such that it is submerged even at the lowest planned water elevation. ISG Response (7/14/2025) – Invert of the outlet pipe has been updated. WSB Response (8/6/2025) – While submerged for the stated NWL, outlet pipe invert should be set according to lowest planned water elevation in the water reuse report. WSB Response (9/4/2025) – Remains an open comment. 6.An impervious clay liner should be specified below Basin 1 as geotech borings in and around the pond show some sandy/silty soils that may infiltrate water meant for irrigation reuse. This will be evaluated with the next submittal. ISG Response (6/9/2025) – Noted. WSB Response (6/20/2025) – Clay liner noted on pond detail. 7.Tree plantings are not recommended on the Basin 1 berm as root growth may weaken its integrity over time. ISG Response (7/14/2025) – Noted, tree plantings have been removed from the top of the berm.. WSB Response (8/6/2025) – Comment addressed. 8.All BMPs and site depressions need to show EOF locations and elevations. ISG Response (6/9/2025) – Addressed. WSB Response (6/20/2025) – EOFs shown. 9.Curb cuts must have rock stabilization over the flow path to BMPs. ISG Response (7/14/2025) – Addressed. WSB Response (8/6/2025) – Comment addressed. 10.Wilkinson Way will be a public road so inlet spread and run calcs, in particular at sag points, must be provided and ensure an 8’ drivable lane during the 3-year storm event. ISG Response (7/14/2025) – Storm sewer inlets spread calculation was calculated using the 3-yr stm event, calculations are included in the stormwater report. WSB Response (8/6/2025) – Provided calculations do not include spread extents. Intake efficiency does not indicate how far into the roadway water will spread during the storm event. Additionally, allowable sag depths of 0.5’ and 1’ would result in ponded water up to and over the crown of the road per the given typical section. This does not provide a center 8’ drivable lane. The provided calculations also appear to be for a 10-year event, not 3-year. WSB Response (9/4/2025) – Remains an open comment. 11.All proposed pipe serving Wilkinson Way must have supporting calculations to ensure there is capacity for conveying the 10-year storm event. ISG Response (7/14/2025) – Storm sewer was sized using the 10-yr stm event, calculations are included in the stormwater report. WSB Response (8/6/2025) – Comment addressed, pipe capacity is sufficient.. 12.The maximum pipe velocity is 10 ft/sec and the minimum is 3 ft/sec. ISG Response (7/14/2025) – Noted, these design considerations have been addressed. WSB Response (8/6/2025) – Comment addressed. Wilkinson Waters Development - Engineering Review