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

More documents

Recommendations

Info

Table 7.14 Tree spacing per acre Spacing (feet) Trees (number) Spacing (feet) Stormwater Functions and Calculations Trees (number) Volume and peak rate Restoration of the riparian buffer will lower runoff volume and peak rates through lowering the runoff coefficient (i.e., curve number). Designers can receive credit based on the square feet of trees or shrubs being Spacing (feet) Trees (number) 2x2 10,890 7x9 691 12x15 242 3x3 4,840 7x10 622 12x18 202 4x4 2,722 7x12 519 12x20 182 4x5 2,178 7x15 415 12x25 145 4x6 1,815 8x8 681 13x13 258 4x7 1,556 8x9 605 13x15 223 4x8 1,361 8x10 544 13x20 168 4x9 1,210 8x12 454 13x25 134 4x10 1,089 8x15 363 14x14 222 5x5 1,742 8x25 218 14x15 207 5x6 1,452 9x9 538 14x20 156 5x7 1,245 9x10 484 14x25 124 5x8 1,089 9x12 403 15x15 194 5x9 968 9x15 323 15x20 145 5x10 871 10x10 436 15x25 116 6x6 1,210 10x12 363 16x16 170 6x7 1,037 10x15 290 16x20 136 6x8 908 10x18 242 16x25 109 6x9 807 11x11 360 18x18 134 6x10 726 11x12 330 18x20 121 6x12 605 11x15 264 18x25 97 6x15 484 11x20 198 20x20 109 7x7 889 11x25 158 20x25 87 7x8 778 12x12 302 25x25 70 added. Proposed trees and shrubs to be planted under the requirements of these BMPs can be assigned a curve number (CN) reflecting a woodlot in “good” condition for an area of 200 square feet per tree or the estimated tree canopy, whichever is greater. For shrubs, calculate based an area of 25 square feet per shrub. Calculation methodology to account for this BMP is provided in Chapter 9. LID Manual for Michigan – Chapter 7 Page 276
Water quality improvement Water quality benefits of restoring riparian buffers are medium to high. The amount of benefit is based on flow characteristics and nutrient, sediment, and pollutant loadings of the runoff as well as the length, slope, type, and density of vegetation in the riparian buffer. Runoff entering Zone 3 filters sediment, begins nutrient uptake, and converts concentrated flow to uniform, shallow sheet flow. Zone 2 provides contact time and carbon energy sources in which buffering processes can take place. It also provides long-term sequestering of nutrients. Zone 1 provides additional soil and water contact area to further facilitate nutrient buffering processes, provides shade to moderate and stabilize water temperature, and encourages production of beneficial algae. Maintenance An effective riparian buffer restoration project should include stewardship guidelines to manage and maintain the site in perpetuity. The most critical period of riparian buffer establishment is canopy closure, which is typically the first three to five years after saplings are planted. Buffer boundaries should be well defined with clear signs or markers. During this time, the riparian buffer should be monitored four times annually (February, May, August, and November are recommended) and inspected after any severe storm. Maintenance measures that should be performed regularly include: 1. Watering • Plantings need deep, regular watering during the first growing season, either natural watering via rainfall, or planned watering via caretaker. • Planting in the fall increases the likelihood of sufficient rain during planting establishment. 2. Mulching • Mulch provides moisture retention in the root zone of plantings, or potentially impacted vegetation from construction, moderate soil temperature, and some weed suppression. • Use coarse, organic mulch that is slow to decompose in order to reduce the need for repeat application. • Apply a two to four-inch layer, leaving air space around tree trunk to prevent fungus growth. • Use a combination of woodchips, leaves, and twigs that have been stockpiled for six months to a year. 3. Weed and invasive plan control • Invasive plants can overrun even a welldesigned planting. It is essential that there is a plan in place to monitor and remove invasive vegetation as the planting matures. Use the Nature Conservancy’s Global Invasive Species Team Web page as a resource for management techniques. (http://tncweeds.ucdavis.edu/ esadocs.html) Non-chemical weed control methods are preferred since chemicals can easily be washed into the stream. • Herbicides Using herbicides is a short-term maintenance technique (two to three years) that is generally considered less expensive and more flexible than mowing and will result in a quicker establishment of the buffer. Consider and evaluate the proximity of herbicide use to water features. • Mowing Mowing controls the height of the existing grasses, yet increases nutrient uptake. Therefore, competition for nutrients will persist until the canopy closure shades out lower layers of growth. A planting layout similar to a grid format will facilitate ease of mowing, but will yield an unnaturally spaced community. Mowing may result in strikes to tree trunks unless protective measures are used. Mowing should occur twice each growing season. Mower height should be set between eight and12 inches. • Weed mats Weed mats are geo-textile fabrics used to suppress weed growth around newly planted vegetation by blocking sunlight and preventing seed deposition. Weed mats are installed after planting, and should be removed once the trees have developed a canopy that will naturally shade out weeds. LID Manual for Michigan – Chapter 7 Page 277
Page 1:
A Design Guide for Implementers and
Page 4 and 5:
LID Manual for Michigan Page ii
Page 6 and 7:
Shawn Keenan, City of Auburn Hills
Page 8 and 9:
Appendix G: Stormwater Management P
Page 10 and 11:
Figure 7.18 Filter with infiltratio
Page 12 and 13:
Table 7.9 Definitions of Wetland Ve
Page 14 and 15:
How this manual is organized This m
Page 16 and 17:
discuss a new development. The staf
Page 18 and 19:
In a natural woodland or meadow in
Page 20 and 21:
Almost all components of the urban
Page 22 and 23:
Benefits of implementing LID Implem
Page 24 and 25:
Table 2.2 Summary of Cost Compariso
Page 26 and 27:
Getting started with LID LID can be
Page 28 and 29:
Precipitation also varies slightly
Page 30 and 31:
Figure 3.4 Soil Freezing in Lower M
Page 32 and 33:
Figure 3.6 Michigan Surficial Geolo
Page 34 and 35:
Most soils in Michigan are classifi
Page 36 and 37:
Table 3.3 Representative Cation Exc
Page 38 and 39:
There is currently no single broadl
Page 40 and 41:
Wellhead protection areas/ public w
Page 42 and 43:
Table 3.4 Michigan Rivers and Strea
Page 44 and 45:
References * Bailey, R.M and G.R. S
Page 46 and 47:
LID Manual for Michigan - Chapter 3
Page 48 and 49:
Following are sample goals and poli
Page 50 and 51:
Develop regulations that encourage/
Page 52 and 53:
Construction activity • Minimize
Page 54 and 55:
Street sweeping in Bloomfield Towns
Page 56 and 57:
Resistance from internal sources an
Page 58 and 59:
Site constraints that may pose chal
Page 60 and 61:
Entity Stormwater Jurisdiction Coun
Page 62 and 63:
Step 1: Property acquisition and us
Page 64 and 65:
can be incorporated into the develo
Page 66 and 67:
Step 3: Integrate municipal, county
Page 68 and 69:
Page 70 and 71:
BMP Selection Process This chapter
Page 72 and 73:
Case Study: Title The second page o
Page 74 and 75:
Case Study: Pokagon Band of Potawat
Page 76 and 77:
Figure 6.2 Conventional development
Page 78 and 79:
Designer/Reviewer Checklist for Clu
Page 80 and 81:
Page 82 and 83:
Case Study: Minimizing soil compact
Page 84 and 85:
4. Topsoil stockpiling and storage
Page 86 and 87:
References Hanks, D. and Lewandowsk
Page 88 and 89:
Case Study: Longmeadow Development
Page 90 and 91:
Applications Minimizing the total d
Page 92 and 93:
Criteria to Receive Credits for Min
Page 94 and 95:
Page 96 and 97:
Case Study: Marywood Health Center
Page 98 and 99:
Design Considerations 1. Identify n
Page 100 and 101:
References Center for Watershed Pro
Page 102 and 103:
Case Study: Macomb County Public Wo
Page 104 and 105:
Zone 3: Also termed the “outer zo
Page 106 and 107:
• Limit clearing and grading of f
Page 108 and 109:
Page 110 and 111:
Case Study: Western Michigan Univer
Page 112 and 113:
Protection of sensitive areas in re
Page 114 and 115:
then weightings of potential develo
Page 116 and 117:
Floodplains • Design the project
Page 118 and 119:
References Arendt, Randall G. Growi
Page 120 and 121:
Case Study: Willard Beach Implement
Page 122 and 123:
Table 6.2 Narrow residential street
Page 124 and 125:
Parking Parking lots often comprise
Page 126 and 127:
Designer/Reviewer Checklist for Red
Page 128 and 129:
Case Study: Saugatuck Center for th
Page 130 and 131:
In addition to directing runoff to
Page 132 and 133:
Designer/Reviewer Checklist for Dis
Page 134 and 135:
Runoff Volume/ Infiltration Runoff
Page 136 and 137:
Figure 7.1 Structural BMP Selection
Page 138 and 139:
In general, the techniques describe
Page 140 and 141:
Table 7.3 Additional BMP considerat
Page 142 and 143:
Maintenance Provides guidance on re
Page 144 and 145:
Case Study: Grayling Stormwater Pro
Page 146 and 147:
Figure 7.5 illustrates a schematic
Page 148 and 149:
Flow inlet: Curbs and curb cuts Cur
Page 150 and 151:
Roads and highways Figure 7.13 show
Page 152 and 153:
Design Considerations Bioretention
Page 154 and 155:
7. Planting periods will vary but,
Page 156 and 157:
Construction Guidelines The followi
Page 158 and 159:
Designer/Reviewer Checklist for Rai
Page 160 and 161:
Case Study: Stormwater Capture with
Page 162 and 163:
Ford Rouge Plant cistern Vertical s
Page 164 and 165:
Design Considerations Design and in
Page 166 and 167:
the tank can accommodate.) (www.sta
Page 168 and 169:
References “Black Vertical Storag
Page 170 and 171:
Case Study: Constructed Linear Sand
Page 172 and 173:
Surface non-vegetated filter A surf
Page 174 and 175:
Large subsurface filter Large Subsu
Page 176 and 177:
would modestly increase constructio
Page 178 and 179:
During inspection the following con
Page 180 and 181:
References Atlanta Regional Commiss
Page 182 and 183:
Site Factors Type Basin Bottom Rela
Page 184 and 185:
Page 186 and 187:
Variations For this manual, detenti
Page 188 and 189:
Precast concrete vault Source: Amer
Page 190 and 191:
surface into the pond to a maximum
Page 192 and 193:
sink for pollutants and generally h
Page 194 and 195:
The presettlement and post-developm
Page 196 and 197:
wet pond and constructed wetland op
Page 198 and 199:
ackfilling operation should driven
Page 200 and 201:
Designer/Reviewer Checklist for Dry
Page 202 and 203:
Designer/Reviewer Checklist for Con
Page 204 and 205:
References AMEC Earth and Environme
Page 206 and 207:
Key Design Features • Depth to wa
Page 208 and 209:
Case Study: Saugatuck Center for th
Page 210 and 211:
Infiltration basins, subsurface inf
Page 212 and 213:
Figure 7.24 Cross-section of dry we
Page 214 and 215:
• The soil mantle should be prese
Page 216 and 217:
Additional design considerations fo
Page 218 and 219:
• Though roofs are generally not
Page 220 and 221:
Subsurface infiltration bed Source:
Page 222 and 223:
Stormwater Functions and Calculatio
Page 224 and 225:
• Protect the infiltration area f
Page 226 and 227:
Additional Construction Guidelines
Page 228 and 229:
Designer/Reviewer Checklist for Inf
Page 230 and 231:
References AMEC Earth and Environme
Page 232 and 233:
Page 234 and 235:
Case Study: Washtenaw County West S
Page 236 and 237:
Design Considerations Level spreade
Page 238 and 239: 3. Inspect the filter strip and the
Page 240 and 241: References Hathaway, Jon and Hunt,
Page 242 and 243: Case Study: Black River Heritage Tr
Page 244 and 245: Figure 7.31 Native meadow species c
Page 246 and 247: Applications • Residential - Nati
Page 248 and 249: 5. Amend soil: In those sites where
Page 250 and 251: Water quality improvement Landscape
Page 252 and 253: References Arendt, R. Growing Green
Page 254 and 255: Case Study: Grand Valley State Univ
Page 256 and 257: Staging, construction practices, an
Page 258 and 259: Reinforced turf/gravel Reinforced t
Page 260 and 261: 4. Pervious pavement and infiltrati
Page 262 and 263: 12. Proper pervious pavement applic
Page 264 and 265: Figure 7.40 Open-graded, clean, coa
Page 266 and 267: Repairs • Surface should never be
Page 268 and 269: References Adams, Michele. “Porou
Page 270 and 271: Case Study: Michigan Avenue Streets
Page 272 and 273: Native vegetation should be used in
Page 274 and 275: Design Considerations • Suggested
Page 276 and 277: oxes, etc. should be installed in a
Page 278 and 279: References Stormwater Management Gu
Page 280 and 281: Case Study: Nankin Mills Interpreti
Page 282 and 283: Figure 7.45 Schematic of a three-zo
Page 284 and 285: 3. Analyze site’s vegetative feat
Page 286 and 287: Black River Heritage Trail and Wate
Page 290 and 291: 4. Stable debris As Zone 1 reaches
Page 292 and 293: References Alliance for the Chesape
Page 294 and 295: Case Study: Ann Arbor District Libr
Page 296 and 297: • Major compaction - Deep compact
Page 298 and 299: e. Add six inches compost or other
Page 300 and 301: References “Achieving the Post-Co
Page 302 and 303: Case Study: Wayne County, MI Ford R
Page 304 and 305: slope needs to be determined. This
Page 306 and 307: Figure 7.52 Sandy soils with HSG Gr
Page 308 and 309: Figure 7.56 Clay Loam, Silty Clay o
Page 310 and 311: • Guidance information, usually i
Page 312 and 313: LID Manual for Michigan - Chapter 7
Page 314 and 315: Case Study: City of Battle Creek Ci
Page 316 and 317: Table 7.16 Vegetated roof types Ext
Page 318 and 319: Dual media assemblies Dual media (F
Page 320 and 321: Over a period of time roots can dam
Page 322 and 323: Technical requirements Root resista
Page 324 and 325: Stormwater Functions and Calculatio
Page 326 and 327: Designer/Reviewer Checklist for Veg
Page 328 and 329: Case Study: Meadowlake Farms Bioswa
Page 330 and 331: lower flows (two-year storm) to dra
Page 332 and 333: Stone check dams Source: Road Commi
Page 334 and 335: 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:
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
Page 362 and 363:
Horizontal grates can be added to a
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 386 and 387:
FLOW CHART A Stormwater Calculation
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:
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
Page 436 and 437:
Botanical Name Common Name Height C
Page 438 and 439:
Zone G Planter Box Plantings Althou
Page 440 and 441:
Zone H Vegetated Roof Plantings Res
Page 442 and 443:
Page 444 and 445:
Pervious Berms (Vegetated Filter St
Page 446 and 447:
Vegetated roofs Some key components
Page 448 and 449:
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:
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 466 and 467:
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 474 and 475:
Page 476 and 477:
Page 478 and 479:
Page 480 and 481:
Page 482 and 483:
Page 484 and 485:
Page 486 and 487:
Page 488 and 489:
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 500 and 501:
Table H.2 Pre-Treatment Options for
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
show all

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

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?