Unit Price Schedule - Fairfax County Homepage | Fairfax County

Standard Wing for Box Culvert (1 Side Only), 4' high $ EA Standard Wing for Box Culvert (1 Side Only), 5' high $ EA ... Bioretention Basins & Filters $ CY Constructed Wetlands $ CY Extended Detention Pond (Dry Pond) $ CY Extended Detention and Retention Riser Structure $ VLF Manufactured BMP Systems - Hydrodynamics $ CY ...

  Standards, Detention, Basin, Extended, Extended detention

Chapter 2 – Dry Extended Detention Basin

Chapter 2 – Dry Extended Detention Basin. 2.1 Overview of Practice . A dry extended detention basin is defined as an impoundment which temporarily detains runoff and releases that runoff at a controlled rate over a specified period of time. By definition, extended dry detention basins are dry structures during non-precipitation periods.

  Detention, Basin, Extended, Detention basin, Extended detention basins

4.7 Sediment Traps and Basins - Home | KYTC

4.7 Sediment Traps and Basins 4.7.2 Sediment (Detention) Basins Definition A sediment basin is a pond created by excavation and construction of an embankment and designed to retain or detain runoff sufficiently to allow excess sediment to settle out. Purpose The sediment basin is intended to collect and store sediment from sites that are cleared or

  Detention, Basin

Table 4.1 New York Stormwater Sizing Criteria1

(provided a micropool is specified) extended detention. A local jurisdiction may reduce this requirement to as little as 12 hours in trout waters to prevent stream warming. If TR-55 method is used for the design of stormwater management practices for storms greater than 90%, detention time may be calculated using either a center of

  Stormwater, Sizing, Detention, Extended, Extended detention, Stormwater sizing

Climate Resiliency Design Guidelines

NYC Mayor s Ofce of Resiliency Climate Resiliency Design Guidelines - ersion 4.0 I. Introduction 5 1 Though the intensity and frequency of storms is expected to increase, firm projections on future wind conditions have not yet been developed. NYC s undertaking a study to assess projected changes to extreme wind hazards and identify risks to the city’s built environment.