Low Impact Development Manual for Michigan - OSEH - University ...

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FLOW CHART A Stormwater Calculation Process Step 1: Complete Worksheet 1 General Site Information Step 2: Map Existing Conditions and Sensitive Natural Resources and complete Worksheet 2 to determine credits for protecting sensitive Natural Resources Step 3: Lay out the proposed development avoiding protected areas. Step 4: Select Non-Structural BMPs that generate runoff reduction credits. Use Worksheet 3 to determine credits. Step 5: Calculate the Net Increase in Runoff Volume. (Complete Worksheet 4) Step 6: Select applicable Structural BMPs to remove the volume increase. Use Worksheet 5 to identify BMPs and calculate volume reduction. Proceed to Flow Chart B: Peak Rate Mitigation LID Manual for Michigan – Chapter 9 Page 374
Peak rate mitigation is required. Demonstrate peak rate mitigation for 2-year to 100-year storms using one or more of the following methods: See Chapter 9, Design Calculation Process, Step 8. And/Or Or Or Simple Volume Diversion Time of Concentration (TOC) Adjustment Composite BMPs with routing Full Stormwater BMP Routing Flow Chart B Peak Rate Mitigation Continuation from Flow Chart A Determine applicable peak rate requirements/ calculations Small Site Exemption? (Worksheet 6) Direct discharge to major lake or river? (See Chapter 9, "Channel Protection Criteria) Have demonstrated that downstream flood capacity is adequate? (See Chapter 9, "Flood Control) No additional peak rate mitigation is required. LID Manual for Michigan – Chapter 9 Page 375 No Proceed to Flow Chart C - Water Quality Process Or Or Yes
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A Design Guide for Implementers and
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LID Manual for Michigan Page ii
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Shawn Keenan, City of Auburn Hills
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Appendix G: Stormwater Management P
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Figure 7.18 Filter with infiltratio
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Table 7.9 Definitions of Wetland Ve
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How this manual is organized This m
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discuss a new development. The staf
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In a natural woodland or meadow in
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Almost all components of the urban
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Benefits of implementing LID Implem
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Table 2.2 Summary of Cost Compariso
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Getting started with LID LID can be
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Precipitation also varies slightly
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Figure 3.4 Soil Freezing in Lower M
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Figure 3.6 Michigan Surficial Geolo
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Most soils in Michigan are classifi
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Table 3.3 Representative Cation Exc
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There is currently no single broadl
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Wellhead protection areas/ public w
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Table 3.4 Michigan Rivers and Strea
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References * Bailey, R.M and G.R. S
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LID Manual for Michigan - Chapter 3
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Following are sample goals and poli
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Develop regulations that encourage/
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Construction activity • Minimize
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Street sweeping in Bloomfield Towns
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Resistance from internal sources an
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Site constraints that may pose chal
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Entity Stormwater Jurisdiction Coun
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Step 1: Property acquisition and us
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can be incorporated into the develo
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Step 3: Integrate municipal, county
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BMP Selection Process This chapter
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Case Study: Title The second page o
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Case Study: Pokagon Band of Potawat
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Figure 6.2 Conventional development
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Designer/Reviewer Checklist for Clu
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Case Study: Minimizing soil compact
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4. Topsoil stockpiling and storage
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References Hanks, D. and Lewandowsk
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Case Study: Longmeadow Development
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Applications Minimizing the total d
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Criteria to Receive Credits for Min
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Case Study: Marywood Health Center
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Design Considerations 1. Identify n
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References Center for Watershed Pro
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Case Study: Macomb County Public Wo
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Zone 3: Also termed the “outer zo
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• Limit clearing and grading of f
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Case Study: Western Michigan Univer
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Protection of sensitive areas in re
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then weightings of potential develo
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Floodplains • Design the project
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References Arendt, Randall G. Growi
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Case Study: Willard Beach Implement
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Table 6.2 Narrow residential street
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Parking Parking lots often comprise
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Designer/Reviewer Checklist for Red
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Case Study: Saugatuck Center for th
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In addition to directing runoff to
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Designer/Reviewer Checklist for Dis
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Runoff Volume/ Infiltration Runoff
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Figure 7.1 Structural BMP Selection
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In general, the techniques describe
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Table 7.3 Additional BMP considerat
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Maintenance Provides guidance on re
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Case Study: Grayling Stormwater Pro
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Figure 7.5 illustrates a schematic
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Flow inlet: Curbs and curb cuts Cur
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Roads and highways Figure 7.13 show
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Design Considerations Bioretention
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7. Planting periods will vary but,
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Construction Guidelines The followi
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Designer/Reviewer Checklist for Rai
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Case Study: Stormwater Capture with
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Ford Rouge Plant cistern Vertical s
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Design Considerations Design and in
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the tank can accommodate.) (www.sta
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References “Black Vertical Storag
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Case Study: Constructed Linear Sand
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Surface non-vegetated filter A surf
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Large subsurface filter Large Subsu
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would modestly increase constructio
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During inspection the following con
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References Atlanta Regional Commiss
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Site Factors Type Basin Bottom Rela
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Variations For this manual, detenti
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Precast concrete vault Source: Amer
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surface into the pond to a maximum
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sink for pollutants and generally h
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The presettlement and post-developm
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wet pond and constructed wetland op
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ackfilling operation should driven
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Designer/Reviewer Checklist for Dry
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Designer/Reviewer Checklist for Con
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References AMEC Earth and Environme
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Key Design Features • Depth to wa
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Case Study: Saugatuck Center for th
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Infiltration basins, subsurface inf
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Figure 7.24 Cross-section of dry we
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• The soil mantle should be prese
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Additional design considerations fo
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• Though roofs are generally not
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Subsurface infiltration bed Source:
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Stormwater Functions and Calculatio
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• Protect the infiltration area f
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Additional Construction Guidelines
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Designer/Reviewer Checklist for Inf
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References AMEC Earth and Environme
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Case Study: Washtenaw County West S
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Design Considerations Level spreade
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3. Inspect the filter strip and the
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References Hathaway, Jon and Hunt,
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Case Study: Black River Heritage Tr
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Figure 7.31 Native meadow species c
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Applications • Residential - Nati
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5. Amend soil: In those sites where
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Water quality improvement Landscape
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References Arendt, R. Growing Green
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Case Study: Grand Valley State Univ
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Staging, construction practices, an
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Reinforced turf/gravel Reinforced t
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4. Pervious pavement and infiltrati
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12. Proper pervious pavement applic
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Figure 7.40 Open-graded, clean, coa
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Repairs • Surface should never be
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References Adams, Michele. “Porou
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Case Study: Michigan Avenue Streets
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Native vegetation should be used in
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Design Considerations • Suggested
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oxes, etc. should be installed in a
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References Stormwater Management Gu
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Case Study: Nankin Mills Interpreti
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Figure 7.45 Schematic of a three-zo
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3. Analyze site’s vegetative feat
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Black River Heritage Trail and Wate
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Table 7.14 Tree spacing per acre Sp
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4. Stable debris As Zone 1 reaches
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References Alliance for the Chesape
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Case Study: Ann Arbor District Libr
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• Major compaction - Deep compact
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e. Add six inches compost or other
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References “Achieving the Post-Co
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Case Study: Wayne County, MI Ford R
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slope needs to be determined. This
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Figure 7.52 Sandy soils with HSG Gr
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Figure 7.56 Clay Loam, Silty Clay o
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• Guidance information, usually i
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Case Study: City of Battle Creek Ci
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Table 7.16 Vegetated roof types Ext
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Dual media assemblies Dual media (F
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Over a period of time roots can dam
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Technical requirements Root resista
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Stormwater Functions and Calculatio
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Designer/Reviewer Checklist for Veg
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Case Study: Meadowlake Farms Bioswa
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lower flows (two-year storm) to dra
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Stone check dams Source: Road Commi
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Table 7.18 Permanent stabilization
Page 336 and 337: Peak rate mitigation Vegetated swal
Page 338 and 339: Designer/Reviewer Checklist for Veg
Page 340 and 341: LID Manual for Michigan - Chapter 7
Page 342 and 343: Case Study: LaVista Storm Drain Pro
Page 344 and 345: Basket type inserts Basket type ins
Page 346 and 347: Maintenance is crucial to the effec
Page 348 and 349: Roadway design, construction, and m
Page 350 and 351: • Vegetated systems such as grass
Page 352 and 353: Of the options explored, the study
Page 354 and 355: Figure 8.3 Tree planting detail Sou
Page 356 and 357: Opportunities for MPOs Metropolitan
Page 358 and 359: Construction on the project began i
Page 360 and 361: The following are examples of imple
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Page 364 and 365: East Hills Center City of Grand Rap
Page 366 and 367: Implementing LID in High Risk Areas
Page 368 and 369: References AASHTO Center for Enviro
Page 370 and 371: LID Design Criteria Defining the hy
Page 372 and 373: Flood control Flood control is base
Page 374 and 375: Table 9.1 90 Percent Nonexceedance
Page 376 and 377: Initial abstraction (I a ) includes
Page 378 and 379: The Curve Number Method is less acc
Page 380 and 381: I = the average rainfall intensity
Page 382 and 383: Table 9.4 Rainfall Events of 24-Hou
Page 384 and 385: • Proceed to Flow Chart B, Peak R
Page 388 and 389: Excessively drained soils may requi
Page 390 and 391: Worksheet 2. Sensitive Natural Reso
Page 392 and 393: WORKSHEET 4. Calculations for Volum
Page 394 and 395: WORKSHEET 6. SMALL SITE / SMALL IMP
Page 396 and 397: WORKSHEET 8. WATER QUALITY WORKSHEE
Page 398 and 399: Reese, S. and J. Lee. “Summary of
Page 400 and 401: ing Department. Most maintenance co
Page 402 and 403: The Hydrotech Garden Roof Assembly
Page 404 and 405: Bioswales provide infiltration of s
Page 406 and 407: The Ingham County Drain Commissione
Page 408 and 409: Constructed wetland The lowest port
Page 410 and 411: LID Manual for Michigan - Chapter 1
Page 412 and 413: LID Manual for Michigan - Appendix
Page 414 and 415: Check dam Cistern Clustering Combin
Page 416 and 417: H:V Horizontal to vertical ratio. H
Page 418 and 419: Planter box Pervious pavement Phase
Page 420 and 421: Total phosphorous (TP) The total am
Page 422 and 423: Ecoregion recommendations are also
Page 424 and 425: Zone A Planting Zone = two-to-four
Page 426 and 427: Zone C Planting Zone = zero-to-two
Page 428 and 429: Representative Zone C Species Cardi
Page 430 and 431: Botanical Name Common Name Height C
Page 432 and 433: Zone E Planting Zone = four-to-18 i
Page 434 and 435: Representative Zone E Species Tall
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Botanical Name Common Name Height C
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Zone G Planter Box Plantings Althou
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Zone H Vegetated Roof Plantings Res
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LID Manual for Michigan - Appendix
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Pervious Berms (Vegetated Filter St
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Vegetated roofs Some key components
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Step 1. Background evaluation Prior
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Methodology for double-ring infiltr
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Step 4. Use design considerations p
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Detention BMP Inspection Checklist*
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Infiltration BMPs Inspection Checkl
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Bioretention Inspection Checklist*
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Bioswale, Filter Strip Inspection C
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6. The [Community] or its designee
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STATE OF MICHIGAN ) ) ss. COUNTY OF
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Exhibit B - Location Map (Sample) S
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• Stormwater runoff, soil erosion
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Retention. A holding system for sto
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ARTICLE IV. STORMWATER PLAN REQUIRE
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The particular facilities and measu
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10. Rainfall Frequency Atlas of the
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Table H.2 Pre-Treatment Options for
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f. Complete development agreements
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must be submitted to the Michigan D
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C. Construction Plans shall be revi
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fine for each day. The rights and r
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Southeast Michigan Council of Gover
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