Differences

This shows you the differences between two versions of the page.

--- prescriptive_compliance [2022/05/13 15:16] – created admin
+++ prescriptive_compliance [2025/04/24 14:39] (current) – admin
@@ Line 1: / Line 1: @@
 ====== Prescriptive Compliance ======
-Soil loss generated from gentle and moderate slopes subject to sheet and rill erosion can be determined using the USLE model. Steep slopes and areas of concentrated flows, such as swales, cannot be modeled using the USLE methodology, and instead, are subject to prescriptive compliance.
+Soil loss generated from gentle and moderate slopes subject to sheet and rill erosion can be determined using the [[Soil Loss and Sediment Discharge|Universal Soil Loss Equation (USLE)]] model. Steep slopes and areas of concentrated flows cannot be modeled using the USLE methodology, and instead, are subject to prescriptive compliance.
-Prescriptive compliance should be established by designing and including appropriate measures in the erosion control plan. Compliance with the soil loss standard can be assumed at prescriptive compliance locations where appropriate measures are used.
+Prescriptive compliance can be established by identifying areas and designing appropriate measures in the erosion control plan.
 Specific areas where prescriptive compliance should be followed are:
@@ Line 14: / Line 14: @@
   *Soil stockpiles
   *Utility trench excavations
+  *Side slopes of storm water management practices
-Once areas identified as needing prescriptive compliance are identified and clearly defined in the plan, appropriate measures need be designed.
+Once areas identified as needing prescriptive compliance are identified and clearly defined in the plan, appropriate measures and specifications need to be designed, as detailed below.
-For slopes exceeding 33%, the soil loss standard is assumed to be met if all the following measures are followed:
+====Practices====
+  * Design and implement approved stabilization practices, typically [[seeding]] with [[Erosion Matting]].
+  * Design stable diversion of off-site runoff around slopes.
+  * Specify [[silt sock|slope interruption devices]] on slopes.
-  - Provide stable diversion of off-site runoff around slope.
+====Stabilization====
-  - Provide slope interruption devices in accordance with [[https://dnr.wi.gov/topic/stormWater/documents/MftdDevice1071.pdf|DNR Slope Interruption Standard]].
+  * Areas that do not drain to a sediment trap must be stabilized within 30 days.
-  - Design and implement stabilization measures in accordance with [[https://dnr.wi.gov/topic/stormWater/documents/NonChannelErosionMat1052.pdf|DNR Non-Channel Erosion Mat Standard]].
+  * Areas that drain to an appropriately sized [[sediment trap]] must be stabilized with 90 days.
-  - Schedule land disturbance activities to limit exposure of bare soil in accordance with Table 1.
+  * Areas left inactive for more than 14 days and those at final grade must be stabilized immediately.
-**Table 1: Maximum length of soil exposure on slopes >33%**
-[[File:/Images/Prescriptive Compliance.PNG|]]
-^ ^Maximum Period of Bare Soil Exposure^^
-|Slope Drains to Trap?|Land Disturbance Between Sept 16 and May 1|Land Disturbance Between May 2 and Sep 15|
-|Yes|90|90|
-|No|60|30|
+===References===
+  *{{ :usle_guidance.pdf |Wisconsin DNR Construction Site Soil Loss Guidance}}