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• Water quality criteria
  ...um degree of pollutant removal for a defined fraction of stormwater runoff events, which has been operationally defined as 90 percent sediment removal. A 50 ...s/index.php/view-document.html?gid=18984 Construction General Permit]. The current MPCA water quality volume criteria is referred to as the “hybrid rule”
  8 KB (1,248 words) - 19:16, 6 December 2022
• TCMA Chloride Management Plan - Prioritizing and Implementing Restoration and Protection - Chloride reduction strategy
  ...management is complex since every winter event is different. The different events can be a result of the type of precipitation, temperature, longevity of the The tool can serve as both a reporting mechanism to understand the current practices and as a planning tool to understand future practices. The planni
  24 KB (3,565 words) - 16:10, 23 November 2022
• Vegetated filter strips
  Vegetated filter strips are most effective for storm events up to the 1- to 2-year event. The effectiveness of filter strips is reduced ...rip with a lower slope; slopes less than 5 percent are most effective. The current state of Minnesota guidelines are consistent with other published guideline
  8 KB (1,208 words) - 13:52, 10 February 2023
• 2020 MS4 General Permit Section 21 MCM 6: Pollution Prevention/Good Housekeeping For Municipal Operations
  ...tees must develop and implement, and existing permittees must revise their current program, as necessary, and :e. stormwater management training events, including general subject matter covered, names and departments of individ
  11 KB (1,506 words) - 17:42, 22 November 2022
• Credits for Better Site design
  Local authorities should keep in mind that the current MPCA CGP, which expires in 2008, does not incorporate a technique for appli Although not explicitly allowed under the current MPCA CGP, there are situations where a local authority could create a water
  44 KB (6,627 words) - 14:13, 6 February 2023
• Test page mtds
  <font size=2>¹Initial GULD approval date. TAPE approval status and current revision dates can be viewed at WA DOE, [https://ecology.wa.gov/Regulations ...nology Assessment Program – Ecology (TAPE). We compiled data for all storm events for each device. Not all data are included in TAPE’s analysis. For exampl
  9 KB (1,324 words) - 15:11, 1 January 2024
• Aaron test 4
  ...es in temperature (States at Risk, 2015) and longer dry times between rain events. These climate change trends present unique challenges to urban stormwater ..., n.d.), but local trends can be different. The time between precipitation events is also changing, which can lead to drought conditions.
  44 KB (6,214 words) - 16:22, 7 May 2024
• Introduction to stormwater modeling
  ...a BMP, predict downstream effects, or some other hydraulic purpose. These events are further defined in the [http://stormwater.pca.state.mn.us/index.php/Uni ...ol require effective management of a long-term sequence of rainfall runoff events rather than performance under a single design storm event.
  65 KB (9,680 words) - 15:36, 20 February 2023
• Water quantity and hydrology benefits of Green Stormwater Infrastructure
  *Select species appropriate for the local current and future water conditions, which typically combine high rates of biomass ...in total water volume movement and retardation of peak flow from rainfall events. When constructed without an underdrain (as an infiltration practice), they
  31 KB (4,513 words) - 22:10, 16 February 2023
• Available stormwater models and selecting a model
  ...el required to predict large storm events (for flood control), small storm events (for water quality predictions), or both? *Modeler experience: what is the model-specific expertise of current staff? Is there budget to hire an expert?
  28 KB (4,130 words) - 11:36, 2 February 2023
• TCMA Chloride TMDL - Implementation Strategy Summary
  ...management is complex since every winter event is different. The different events can be a result of the type of precipitation, temperature, longevity of the ...fforts. The tool can serve as both a reporting mechanism to understand the current practices and as a planning tool to understand future practices. The planni
  31 KB (4,728 words) - 14:57, 23 November 2022
• Stormwater reuse for irrigation - preliminary modeling analysis
  ...ter-event time (hours) = 10. P8 summarizes results in a series of discrete events. The minimum inter-event time is equals the minimum number of consecutive d .... Additionally, depending on the geographic location within the state, the current climate, and/or the type of plant species that are being irrigated, the app
  21 KB (3,095 words) - 21:18, 21 February 2023
• PART V. Stormwater Management Program
  ...all continue to operate in accordance with this permit and the Permittee’s current Stormwater Management Program. The Permittee shall, upon the receipt of not :: 1) current MS4 permit
  54 KB (7,826 words) - 15:12, 3 December 2022
• Street sweeping for trees
  ...ve been offset by P immobilization into litter by decomposers between rain events." … “careful selection of street tree species and timely removal of lit ...gen can be removed for as little as &#36;28 per pound in targeted sweeping events. They concluded that optimization of sweeping practices is expected to keep
  22 KB (3,194 words) - 18:47, 20 February 2023
• Adapting stormwater criteria for receiving waters
  ...oint, lakes can be divided into three management categories based on their current trophic status and sensitivity to additional phosphorus loads. ...ery little bypass of untreated runoff. In addition, runoff from many storm events is retained within the pond over several storm cycles to help improve phosp
  45 KB (6,677 words) - 13:36, 6 January 2023
• New permit requirements and related guidance materials
  :c. date(s), location(s), and estimated number of participants at events held for purposes of compliance with item 17.3; :d. notices provided to the public of any events scheduled to meet item 17.3, including any electronic correspondence (e.g.,
  36 KB (5,350 words) - 16:52, 8 December 2022
• Planning green stormwater infrastructure projects and practices
  ===Sequence events for GSI planning=== ...r green stormwater infrastructure|<font size=3>Schematic for sequencing of events for green stormwater infrastructure</font size>]]
  66 KB (9,074 words) - 22:00, 21 February 2023
• Process for selecting Best Management Practices
  ...ater treatment suitability. Not all BMPs work over the wide range of storm events that need to be managed at the site, so designers need to choose the type o ...in most communities. Constrained techniques are harder to implement since current local codes impede or even prohibit their use in some communities. Designer
  40 KB (6,039 words) - 14:08, 11 February 2023
• Green Stormwater Infrastructure design strategies and practices for climate resilience
  ...es in temperature (States at Risk, 2015) and longer dry times between rain events. These climate change trends present unique challenges to urban stormwater ..., n.d.), but local trends can be different. The time between precipitation events is also changing, which can lead to drought conditions.
  66 KB (9,146 words) - 16:40, 3 April 2024
• Guidance on what discharges should be included in the TMDL wasteload allocation for MS4 stormwater
  ...discusses recommended procedures for addressing wasteload allocations for current or future municipal stormwater discharges regulated under a National Pollut *The WLA must include all current discharges comprised of drainage from within a regulated municipality or to
  45 KB (7,197 words) - 14:46, 4 December 2022

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