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

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Table H.2 Pre-Treatment Options for Stormwater Hot Spots Stormwater Hot Spots Minimum Pre-Treatment Options Vehicle Maintenance and Repair Facilities A, E, F, G Vehicle Fueling Stations A, D, G “Fast Food” Restaurants B, C, D, I, K Convenience Stores B, C, D, I, K Outdoor Chemical Mixing or Handling G, H Outdoor Storage of Liquids G Commercial Nursery Operations I, J, L Other Uses or Activities Designated by Appropriate Authority As Required Table H.3 Minimum Pre-Treatment Options A Oil/Water Separators / Hydrodynamic Separators Minimum Pre-Treatment Options B Sediment Traps/Catch Basin Sumps C Trash/Debris Collectors in Catch Basins D Water Quality Inserts for Inlets E Use of Drip Pans and/or Dry Sweep Material under Vehicles/Equipment F Use of Absorbent Devices to Reduce Liquid Releases G Spill Prevention and Response Program H Diversion of Stormwater away from Potential Contamination Areas I Vegetated Swales/Filter Strips J Constructed Wetlands K Stormwater Filters (Sand, Peat, Compost, etc.) L Stormwater Collection and Reuse (especially for irrigation) M BMPs that are a part of a Stormwater Pollution Prevention Plan (SWPPP) under a NPDES Permit D. For other earth changes or activities subject to Stormwater Plan requirements, the plan shall be submitted to the before construction drawings are submitted. E. Compliance with the requirements of this Ordinance does not eliminate the need for the proprietor to obtain required permits and approvals from county and state agencies. F. Compliance with the requirements of this Ordinance does not eliminate the need for the proprietor to comply with other applicable ordinances and regulations. G. Upon submission of a Stormwater Plan, as provided above, such plan shall be forwarded to the Engineering and Environmental Consultants for review and recommendation to the Planning Commission. If the site plan, subdivision plat, or other earth change plan is revised, then the Stormwater Plan shall also be revised and rereviewed by the Engineering and Environmental Consultants to ensure continued compliance with all other applicable ordinances. LID Manual for Michigan – Appendix H Page 488
Section 4.05 Review Procedures A. All Stormwater Plans, including waiver submissions, shall receive engineering and environmental review. 1. If the proposed plan is not sufficient as originally submitted, the will notify the applicant in writing, setting forth the reasons for withholding a recommendation for approval, and will state the changes necessary to obtain approval. B. Planning Commission Review 1. The Planning Commission shall, following recommendation by the staff Note to Ordinance Developer: and consultants, review Stormwater Plans, including Review Procedures waiver submissions in conjunction with the submitted This review process includes review by the site plan or subdivision plat. Planning Commission. Although stormwater 2. If the Planning Commission determines that all of the review is not necessarily listed in state law for required information has not been received, the proprietor Planning Commissioners’ responsibility, their in- may request that the matter be tabled to allow for the put would be consistent with other local review submittal of the required information. processes (e.g., site plan review). 3. If all the required information has been received, the Planning Commission shall recommend approval, recommend approval with conditions, or recommend denial of the Stormwater Plan, including waiver submissions. Recommendations for action on the Stormwater Plan can be part of the recommendation for action on the site plan or subdivision plat. C. Board Review 1. The Board/Council shall, following recommendation by the Planning Commission review the Stormwater Plan, including waiver submissions in conjunction with the submitted site plan or subdivision plat. 2. The Board/Council shall approve, approve with conditions, or deny approval of the Stormwater Management Plan. 3. If the plan is approved, the will require the following as a condition of approval. a. Before approval of the final plan, copies of all necessary Wetland, Floodplain, Inland Lakes and Streams, Erosion Control or other needed state, federal, or local permits relating to stormwater management have been provided by the applicant for the file. b. A satisfactory agreement that assures long-term maintenance of all drainage improvements will be in place before submission of the final plan. Documentation of maintenance agreement will be supplied to the and approved by the Board/Council. c. The applicant will post cash or a letter of credit in an amount not less that 10 percent of the cost of the stormwater facilities for projects of less than $100,000 or five percent of the cost for projects over $100,000 (See Sections C and D below). This deposit will be held for one year after the date of completion of construction and final inspection of the stormwater facilities, or until construction on all phases in the development are completed, whichever time period is longer. d. This deposit will be returned to the applicant (in the case of cash) or allowed to expire (in the case of a letter of credit), as provided above, provided all stormwater facilities are clean, unobstructed, and in good working order, as determined by the Engineer. e. Reproducible mylars and electronic files (in AutoCAD format) of the as-built storm drains and stormwater BMPs will be submitted by the applicant or his/her engineer to the along with the final plan, or upon completion of system construction. The mylars are to be of quality material and three mils in thickness. LID Manual for Michigan – Appendix H Page 489
Page 1:
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
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Peak rate mitigation Vegetated swal
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Designer/Reviewer Checklist for Veg
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Case Study: LaVista Storm Drain Pro
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Basket type inserts Basket type ins
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Maintenance is crucial to the effec
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Roadway design, construction, and m
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• Vegetated systems such as grass
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Of the options explored, the study
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Figure 8.3 Tree planting detail Sou
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Opportunities for MPOs Metropolitan
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Construction on the project began i
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The following are examples of imple
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Horizontal grates can be added to a
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East Hills Center City of Grand Rap
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Implementing LID in High Risk Areas
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References AASHTO Center for Enviro
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LID Design Criteria Defining the hy
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Flood control Flood control is base
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Table 9.1 90 Percent Nonexceedance
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Initial abstraction (I a ) includes
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The Curve Number Method is less acc
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I = the average rainfall intensity
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Table 9.4 Rainfall Events of 24-Hou
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• Proceed to Flow Chart B, Peak R
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FLOW CHART A Stormwater Calculation
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Excessively drained soils may requi
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Worksheet 2. Sensitive Natural Reso
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WORKSHEET 4. Calculations for Volum
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WORKSHEET 6. SMALL SITE / SMALL IMP
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WORKSHEET 8. WATER QUALITY WORKSHEE
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Reese, S. and J. Lee. “Summary of
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ing Department. Most maintenance co
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The Hydrotech Garden Roof Assembly
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Bioswales provide infiltration of s
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The Ingham County Drain Commissione
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Constructed wetland The lowest port
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LID Manual for Michigan - Appendix
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Check dam Cistern Clustering Combin
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H:V Horizontal to vertical ratio. H
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Planter box Pervious pavement Phase
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Total phosphorous (TP) The total am
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Ecoregion recommendations are also
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Zone A Planting Zone = two-to-four
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Zone C Planting Zone = zero-to-two
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Representative Zone C Species Cardi
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Botanical Name Common Name Height C
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Zone E Planting Zone = four-to-18 i
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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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Pervious Berms (Vegetated Filter St
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Vegetated roofs Some key components
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Page 450 and 451: Step 1. Background evaluation Prior
Page 452 and 453: Methodology for double-ring infiltr
Page 454 and 455: Step 4. Use design considerations p
Page 456 and 457: LID Manual for Michigan - Appendix
Page 458 and 459: Detention BMP Inspection Checklist*
Page 460 and 461: Infiltration BMPs Inspection Checkl
Page 462 and 463: Bioretention Inspection Checklist*
Page 464 and 465: Bioswale, Filter Strip Inspection C
Page 468 and 469: 6. The [Community] or its designee
Page 470 and 471: STATE OF MICHIGAN ) ) ss. COUNTY OF
Page 472 and 473: Exhibit B - Location Map (Sample) S
Page 490 and 491: • Stormwater runoff, soil erosion
Page 492 and 493: Retention. A holding system for sto
Page 494 and 495: ARTICLE IV. STORMWATER PLAN REQUIRE
Page 496 and 497: The particular facilities and measu
Page 498 and 499: 10. Rainfall Frequency Atlas of the
Page 502 and 503: f. Complete development agreements
Page 504 and 505: must be submitted to the Michigan D
Page 506 and 507: C. Construction Plans shall be revi
Page 508 and 509: fine for each day. The rights and r
Page 512: Southeast Michigan Council of Gover
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