Differences

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

--- stormwater_maintenance [2022/07/29 16:10] – admin
+++ stormwater_maintenance [2025/01/15 09:57] (current) – megan_duffy
@@ Line 5: / Line 5: @@
 The cost, level of effort and expertise required to maintain stormwater practices varies, depending on the type, size and complexity of the practice. Routine maintenance, such as mowing and removing debris or trash, is needed multiple times each year and can easily be performed by most landowners. More significant maintenance, such as removing accumulated sediment is needed less frequently, but requires more skilled labor and special equipment. Inspection and repair of critical structural features, such as embankments and outlet structures, needs to be performed by a qualified professional that has experience in the construction, inspection, and repair of these features. The financial cost of maintaining stormwater practices should be understood at the time of permitting and planned for after construction is complete.
+For practice specific flyers, see the [[Stormwater Resources]] page.
 =====Maintenance Agreement=====
-A signed and notarized {{ :stormwater_maintenance_agreement.pdf |stormwater maintenance agreement}}, with $30 recording fee (made out to "Register of Deeds"), is required before a stormwater permit can be issued. The agreement binds maintenance to the current property owner and details specific maintenance tasks for practices located on the site.
+A signed and notarized {{:stormwater_maintenance_agreement.pdf |Stormwater Maintenance Agreement}} ( {{ :maintenance_agreement.doc| }}), with $30 recording fee (made out to "Register of Deeds") must be provided before a stormwater permit can be issued. Once recorded, this document binds maintenance requirements to the property owner. The agreement must have an Exhibit A that provides the legal description of the property and details specific maintenance tasks for practices located on the site. {{ :wiki:images:maintenance_exhibit_b.pdf |Exhibit B}} shows a simplified site plan and clearly identifies the location of all stormwater practices.
+{{ :wiki:images:maintenance_map.png?600 |}}
 ====General Maintenance Requirements====
@@ Line 31: / Line 33: @@
   * Inspect twice a year to ensure proper operation and check for any potential problems, such as: sediment accumulation, subsidence, erosion, damage to the emergency spillway, and woody vegetation.
   * Removed accumulated sediment from the pond as necessary. Sediment removal will be more frequent than in a wet pond due to the smaller storage volume.
+  * Repairs must restore the practice to the approved plan design.
 ===Infiltration Basin===
@@ Line 52: / Line 55: @@
   * Water plants as needed during first growing season and during dry periods after first growing season.
   * Treat diseased trees and shrubs as needed.
-  * Do not be dump snow into device.
+  * Do not dump snow into device.
   * Once a dense vegetation layer is formed, additional mulch does not need to be added.
   * Repairs must restore the practice to the approved plan design.
@@ Line 95: / Line 98: @@
   * Repairs must restore the system to the approved plan design.
-===Grassed Swale===
+===Vegetated Swale===
-  * Inspect swales annually to detect and remedy nuisance conditions such as standing water or trash dumping. The swale shall be [specify design vegetation type]. Annual inspection should determine if vegetation is per plans (i.e., appropriate vegetation present, lack of weeds and woody growth), and if not, measures should be taken to establish appropriate vegetation.
+  * Inspect swales annually to detect and remedy nuisance conditions such as standing water or trash dumping.
-  * Areas of swale showing signs of soil erosion should be repaired.
+  * Maintain vegetation type and height specified in approved plan.
-  * Areas of swale with no vegetation shall be restored to good vegetated catch.
+  * Repair areas of swale showing signs of erosion.
-  * Limit off-street parking or other activities that may cause rutting or soil compaction in swales and repair as needed.
+  * Limit off-street parking or other activities that may cause rutting or soil compaction in swales.
-  * Limit the use of pesticides and fertilizer if swale is used for water quality control.
+  * Limit the use of pesticides and fertilizer.
-  * Maintain a height of [specify design height for vegetation] when mowing or cutting.
+  * Remove sediment when visible or if standing water exists for 24 hours after a rainfall/runoff event. After sediment removal, repair any damaged or eroded areas by filling with topsoil, reseeding and matting to reestablish vegetation.
-  * Remove sediment when infiltration rates are impeded, sediment accumulation is visible, or if standing water exists for 48 hours after a rainfall/runoff event. Avoid compaction of the soil in the swale during the sediment removal process. After sediment removal, repair any damaged or eroded areas by filling with topsoil. [Remove compaction language, if swale does not provide infiltration]. Reseed as needed to reestablish vegetation.
   * Repairs must restore the practice to the approved plan design.
 ===Infiltration Trench===
-  * Inspect monthly during the first year of operation, then annually. The infiltration trench is considered failed if water is present in the observation well 72 hours after the last storm event and must be restored according to the approved plan design.
+  * Inspect monthly during the first year of operation, then twice per year. The infiltration trench is considered failed if water is present in the observation well 72 hours after the last storm event and must be restored according to the approved plan design.
   * Remove accumulated material or debris on the surface of the trench and outlet regularly.
   * Do not be dump snow into trench.
-  * Measure water depth twice per year,
   * Repairs must restore the practice to the approved plan design.
 ===Underground Infiltration Chamber===
-  * Perform monthly physical inspections during the first year of operation, then annually.
+  * Inspect monthly during the first year of operation, then twice per year, in early spring and early fall. The infiltration chamber is considered failed if water is present 72 hours after the last storm event and must be restored according to the approved plan design.
-  * Water depth in the chamber shall be measured and recorded twice per year 72 hours after a rainfall event of 0.5 inches or more during a 24-hour period. The infiltration trench will be considered failing if water is present 72 hours after the last storm event.
+  * Repairs must restore the practice to the approved plan design.
-  * Repairs must restore the component to the specifications of the approved plan.
 ===Filtration Device===
-  * Proprietary filtration devices shall be installed and maintained in a manner consistent with laboratory testing and modeling assumptions used to predict effectiveness. This includes the following requirements:
+  * Maintain [insert device name] according to the manufacturer's guidelines.
-    * The device shall be installed in accordance with manufacturer recommendations.
+  * Inspect filtration devices twice per year, in early spring and early fall.  Removal of sediment and debris shall be performed once 8 inches in depth or the volume exceeds 15% of the total storage volume.
-    * the installed device shall be equipped with an internal or external bypass to divert flows in excess of the design treatment flow rate.
-  * Filtration devices shall be inspected semi-annually in early spring and early fall.  Cleaning of TSS and other debris shall be performed anytime the sediment in the unit reaches 8 inches in depth or the volume exceeds 15% of the total storage volume.
+====Additional Forms====
+{{ ::release_of_restriction.pdf |Release of Deed Restriction}}