BEsT MANAGEMENT PRACTICEs HANDbooK - Tahoe BMP

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Table 4.3-7: Rock Lined and Vegetated Swale Inspection and MaintenanceINSPECTION AND MAINTENANCE ACTIVITIESInspect for signs that runoff is properly accessing and being conveyed by the swale.• Repair any blocked or diverted conveyances.• If standing water remains 96 hours after a storm, vector control for mosquitoes and rehabilitation of theswale is needed.Inspect for trash and debris.• Remove trash and debris from swale.Inspect for erosion and undercutting, especially along the swale bottom and adjacent slopes.• Stabilize eroded and undercut areas.• Improve swale lining to dissipate energy.For vegetated swales: Inspect for successful vegetation establishment (80% cover) and initial die off todetermine if any remedial actions are needed, such as reseeding and irrigation the first year.• Amend soils, reseed/replant, mulch, and irrigate as necessary to achieve desired vegetative establishment.• Flows may have to be redirected if major work to the swale exposes bare soil for an extended time period.For rock lined swales: Inspect for dislodged or unstable rock and any erosion, especially along the channelbottom and adjacent slopes.• Repair dislodged or unstable rock.• Stabilize eroded and undercut areas.Measure depth of sediment to determine accumulated depth.• If accumulated material has decreased swale capacity by 10%, is deeper than 3” in any spot or coversvegetation, removal of accumulated material is needed.• Scrape bottom (shovel, backhoe, or vactor) to remove sediment and restore original cross-section.• Dispose of sediment at a stable on-site location or outside of the Lake Tahoe Region.• Aerate the bottom of swale to restore Ksat rate and reseed/replant if necessary.For vegetated swales: If vegetation exceeds 12”, mow to 6” height, use care (such as not mowing while groundis moist) to avoid excess compaction.• Remove and compost cut vegetation from the site to avoid release of sequestered nutrients.Inspect site for unusual or unsafe conditions (snowplow damage, structural damage, dumping, vandalism, etc.).• Repair structural components as necessary.Inspect for animal burrows, holes, and mounds.• If burrows are causing erosion or compromising structural integrity, backfill firmly.Monitor ongoing effectiveness and determine whether another BMP type or additional BMPs could improvelong-term effectiveness and improve benefits to costs versus the existing riprap.• Prepare a plan that more effectively addresses soil stabilization, reduces long term maintenance costs andimproves overall effectiveness and safety of the BMP.SUGGESTEDFREQUENCYBefore and duringmajor stormsINSPECTIONEQUIPMENTMAINTENANCEEQUIPMENTTrash bagShovelMonthly (April—Oct) Trash bagMonthly (April—Oct)Monthly duringfirst growing seasonMonthly (April—Oct)Semi-annually (springand fall) and aftermajor stormsSpring and fallVegetationInspectorStaff Plate, StadiaRod, or RulerQualifiedinspectorErosion ControlBlanket, Coir LogsSoil AmendmentSeeds/PlantsMulchIrrigationTools as needed toreplace rock andaddress erosionShovel, Backhoe, orVactor TruckPickup or DumpTruckAerator for basinbottomClippers, LoppersMower, Trash BagAnnually in spring Tools as neededAnnually in fall aftervegetation trimmingEvery 5 yearsQualifiedinspector orconsultantTools as needed torepairQualified inspectoror consultantChapter 4: BMP Toolkit TRPA BMP Handbook4.3.1.10-Rock Lined and Vegetated Swale 2012Page 4
Figure 4.3-h: Rock Lined SwaleTRPA BMP HandbookChapter 4: BMP Toolkit2012 4.3.1.10-Rock Lined and Vegetated SwalePage 5
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PREFACEThe Tahoe Regional Planning
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TABLE OF CONTENTSPREFACE...........
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3.5.5 Stormwater Treatment ........
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6.3 Projects 1 to 5 Acres and all C
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8.10.5 Maintenance ................
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Table 8-4: Federal, State and Regio
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Figure 4.3-i: Vegetated Swale .....
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INTRODUCTIONPURPOSE AND USERS OF TH
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Lake Tahoe’s world renowned blue
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Urbanization in the Lake Tahoe wate
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50 percent of the light scattering
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Figure I-c: Impervious Cover versus
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Disconnected impervious areasdrain
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POLLUTANT EFFECT URBAN SOURCES ASSO
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BEST MANAGEMENT PRACTICESHistorical
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Table I-2: Differences in BMP Retro
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CHAPTER 1: URBAN HYDROLOGY1.1 PURPO
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Figure 1-a: Runoff ProcessesTRPA BM
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Although many urbanized areas face
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watersheds to make the necessary es
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Pollutant load estimates are typica
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differ from the following recommend
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Figure 1-b: Hydrologic Processes an
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1.3.3.2 NRCS BMP CALCULATION SPREAD
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1.3.3.3 RATIONAL METHODMODEL SUMMAR
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1.3.3.4 LOAD REDUCTION PLANNING TOO
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in HMS may be event-based or contin
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1.3.3.6 POLLUTANT LOAD REDUCTION MO
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AVAILABILITY AND SUPPORTING DOCUMEN
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TYPICAL LEVEL OF EFFORTHSPF and LSP
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few days to a week of time to revie
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USACE studies recommended use of th
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during the initial site visit, or c
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Figure 2-a: Soil Horizons• Depth
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Evidence of compacted and disturbed
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UNMAPPED ROCK OUTCROPS, STEEP SLOPE
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The primary pollutants of concern o
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On the map use an arrow to delineat
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2.2.3 ADDITIONAL DATA GATHERINGAfte
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and allowable uses. Baseline Land C
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topographic survey will be required
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Table 2-3: Basis of Capability Clas
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Keep your property lean, clean,and
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treatment. This will reduce the mai
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ponds, wetlands, lakes, manmade cha
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2.3.3.2 SOILS HYDROLOGIC REPORTThe
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CHAPTER 3: PERMANENT BMP PLANNINGAN
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STORMWATER TREATMENTRepresents BMPs
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Table 3-1: Waste Management and Mat
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D. STABILIZE STEEP DISTURBED SLOPES
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This infiltration trench collects s
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3.5 PROJECTS 1 TO 5 ACRES AND ALL C
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This Page Blank.TRPA BMP HandbookCH
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unnecessary turf areas and replace
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Table 3-5: Waste Management and Mat
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3.5.2.3 SOIL STABILIZATIONA. RESTOR
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Left: Dripline erosion below a deck
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Pervious concrete parking pad locat
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3.5.5 STORMWATER TREATMENT3.5.5.1 M
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3.6.1.1 JURISDICTIONThese projects
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to perform required inspection and
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3.8.2.4 SHARED ACCESS AND EASEMENTS
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3.8.2.8 STREAM ENVIRONMENT ZONES (S
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Sediment versus erosion:Suspended s
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CONTENTSCHAPTER 4: BMP TOOLKIT ....
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CHAPTER 4: BMP TOOLKIT4.1 HYDROLOGI
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4.1.1.1 PERVIOUS PAVEMENTAlternativ
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• Tree canopy overhead can decrea
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ate determined at the time of insta
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Figure 4.1-a: Pervious ConcreteTRPA
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4.1.1.2 INFILTRATION BASINAlternati
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groundwater, depths to restrictive
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Very few performance monitoring stu
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INSPECTION AND MAINTENANCE ACTIVITI
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4.1.1.3 INFILTRATION TRENCHAlternat
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• Consult the NRCS Tahoe Basin So
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• Alternative Method: Excavate th
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Figure 4.1-c: Infiltration TrenchTR
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Figure 4.1-e: Roof Dripline Planter
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4.1.1.4 SUBSURFACE INFILTRATION SYS
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percent void space compared to 40 p
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• Ensure the surrounding surface
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4.1.1.5 RAIN BARREL AND CISTERNAlte
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• Position the rain barrel or cis
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4.1.1.6 RAIN GARDENAlternative Name
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• To manage high flows, design a
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4.1.1.7 FILTER STRIPAlternative Nam
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• The top of the vegetated filter
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INSPECTION AND MAINTENANCE ACTIVITI
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Figure 4.1-i: Vegetated Filter Stri
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LIST OF FIGURESFigure 4.2-a: Slope
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Chapter 4: BMP ToolkitTRPA BMP Hand
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• Obtain and use a road abrasive
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• Mechanical broom sweepers may a
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EFFECTIVENESS CONSIDERATIONSA signi
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for dry basins or infiltration basi
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• For unpaved snow storage areas
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Figure 4.2-a: Slope Stabilization A
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Disadvantages• Not always success
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• Bind together long live branch
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Brush Layering and MattingBrush lay
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Advantages• Reduces the erosion p
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Table 4.2-1: Terracing Inspection a
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Disadvantages• Can be complicated
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• Revegetate the backfilled bench
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Figure 4.2-d: Timber Retaining Wall
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Advantages• Versatile and applica
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Table 4.2-3: Riprap Inspection and
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educe the concentration of runoff,
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Figure 4.2-g: Slope Bottom BenchFig
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• Contour Furrows - relatively de
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APPLICABILITYAll roads, driveways,
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Stormwater runoff from a paved park
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Figure 4.2-k: Grading for Sheet Flo
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INORGANIC MULCH:• Areas where org
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• Stockpile and use existing orga
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The surface under the raised decksh
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Figure 4.2-l: Rock Armor - Elevated
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Clustered boulders used for parking
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• Helps to protect wildlife.• H
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EFFECTIVENESS CONSIDERATIONSA prope
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Improper storage of hazardous mater
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• Try to use the entire product b
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facilities must be equipped with ap
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• Dispose of it properly• Be a
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Disadvantages• Additional resourc
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• All hay, cubed hay, straw, mulc
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• Sanitary sewer regulations gene
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APPLICABILITYAll vehicles, includin
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• Do not perform other vehicle or
Page 294 and 295: LIST OF FIGURESFigure 4.3-a: Curb B
Page 296 and 297: Chapter 4: BMP ToolkitTRPA BMP Hand
Page 298 and 299: APPLICABILITY• Culverts are appli
Page 300 and 301: deterioration. The inspection crew
Page 304 and 305: APPLICABILITY• Curb and gutters a
Page 306 and 307: INSTALLATION CONSIDERATIONS• Inst
Page 308 and 309: Figure 4.3-b: Rolled CurbChapter 4:
Page 310 and 311: Advantages• Prevents the discharg
Page 312 and 313: Table 4.3-2: Storm Drain Inspection
Page 314 and 315: Advantages• Prevents scour that m
Page 316 and 317: Figure 4.3-c: Outlet ProtectionChap
Page 320 and 321: • The structure can be designed t
Page 324 and 325: INSTALLATION CONSIDERATIONS• Disc
Page 328 and 329: Advantages• Assists in the contro
Page 330 and 331: Figure 4.3-e: Slotted Channel Drain
Page 332 and 333: Advantages• May be less expensive
Page 334 and 335: Table 4.3-5: A/C Swale Inspection a
Page 338 and 339: • Prevents property damage, slope
Page 340 and 341: Figure 4.3-g: Subsurface DrainChapt
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Page 346 and 347: Figure 4.3-i: Vegetated SwaleChapte
Page 348 and 349: Check dams installed in water sprea
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Page 352 and 353: CONTENTS4.4 Stormwater Treatment ..
Page 354 and 355: 4.4 STORMWATER TREATMENTThe primary
Page 356 and 357: 4.4.1.1 WET BASINAlternative Names:
Page 358 and 359: • Surcharge storage above the wet
Page 360 and 361: Table 4.4-1: Wet Basin Inspection a
Page 362 and 363: Figure 4.4-a: Wet Basin (Concept Dr
Page 364 and 365: 4.4.1.2 BIOSWALEAlternative Names:
Page 366 and 367: • Consider incorporating trees or
Page 368 and 369: Figure 4.4-b: Bioswale (Linear Basi
Page 370 and 371: 4.4.1.3 DRY BASINAlternative Names:
Page 372 and 373: • Drainage design standards for t
Page 374 and 375: INSPECTION AND MAINTENANCE ACTIVITI
Page 376 and 377: Figure 4.4-c: Detention BasinTRPA B
Page 378 and 379: 4.4.2 FLOW THROUGH TREATMENTFlow-th
Page 380 and 381: 4.4.2.1 DROP INLET INSERTAlternativ
Page 382 and 383: INSTALLATION CONSIDERATIONS• Refe
Page 384 and 385: 4.4.2.2 TRASH RACKAlternate Names:
Page 386 and 387: 4.4.2.3 BAFFLED VAULTAlternative Na
Page 388 and 389: • Ensure that site conditions all
Page 390 and 391: 4.4.2.4 HYDRODYNAMIC SEPARATORAlter
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4.4.2.5 MEDIA FILTERAlternate Names
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Cartridge Filter• Cartridge filte
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• Vent the system as for undergro
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4.4.2.6 SEDIMENT TRAPAlternative Na
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INSPECTION AND MAINTENANCE• Regul
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Figure 4.4-e: Sediment TrapTRPA BMP
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CONTENTS4.5 Temporary BMPs for Cons
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4.5 TEMPORARY BMPS FOR CONSTRUCTION
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concrete washouts and stockpiles sh
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4.5.1.1 CONSTRUCTION PLANNING AND S
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• Measures to minimize the potent
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4.5.1.2 CONSTRUCTION BOUNDARY FENCI
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Figure 4.5-a: Construction Boundary
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4.5.1.3 DEWATERINGDESCRIPTIONDewate
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Figure 4.5-b: DewateringTRPA BMP Ha
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• Use this settled water to fill
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4.5.1.4 CLEAN WATER DIVERSIONAltern
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• Avoid disturbing aquatic specie
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• Pipe slope drain: A rigid pipe,
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Stream Isolation Techniques:• Tur
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Figure 4.5-f: Water DiversionTRPA B
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4.5.1.5 VEGETATION PROTECTIONAltern
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• Growing Space: Provide spacing
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Figure 4.5-g: Vegetation Protection
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4.5.1.6 TEMPORARY SANITATION FACILI
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4.5.1.7 DUST CONTROLAlternate Names
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• Blanket with geotextiles or veg
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4.5.1.8 VEHICLE INGRESS EGRESS MANA
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• If possible, re-use swept or va
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4.5.1.9 WINTERIZATIONDESCRIPTIONBet
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INSPECTION AND MAINTENANCEEnsure th
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4.5.1.10 CONSTRUCTION STAGINGAltern
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4.5.1.11 MATERIAL HANDLING STORAGE
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• Ensure that current Material Sa
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4.5.1.12 TOPSOIL SALVAGEAlternative
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• If topsoil will not be used for
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4.5.1.13 CONCRETE/BENTONITE MANAGEM
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Figure 4.5-i: Concrete Washout Stat
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4.5.1.14 STOCKPILE MANAGEMENTAltern
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Figure 4.5-j: Stockpile ManagementT
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4.5.2 EROSION AND SEDIMENT CONTROLR
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4.5.2.1 SWEEPINGDESCRIPTIONDuring c
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4.5.2.2 DRAIN INLET PROTECTIONAlter
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inches. Take care to ensure that no
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Figure 4.5-k: Drain Inlet Protectio
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4.5.2.3 FIBER ROLLAlternative Names
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• Adjust spacing of fiber rolls a
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Figure 4.5-l: Fiber RollsTRPA BMP H
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4.5.2.4 SILT FENCEAlternative Names
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• Turn the fabric uphill at the e
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Figure 4.5-m: Silt FenceTRPA BMP Ha
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4.5.2.5 EROSION CONTROL BLANKET SYS
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structures mark the boundaries of t
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Figure 4.5-p: Anchoring Geotextiles
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4.5.2.6 HYDROMULCH, TACKIFIER, AND
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INSPECTION AND MAINTENANCE• Hydro
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5.2 SOILSoil is a complex living sy
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Tilling green wood chips intothe so
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areas such as SEZs and in shorezone
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Large boulders provide permanent ve
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To address this TRPA’s Regional P
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to apply ½ inch of water. Water yo
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Pesticides can be degraded by sunli
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5.3.2.5 FIRE DEFENSIBLE SPACEFire d
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etween them. For example, shrubs wi
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5.4 PROJECT SCALE REQUIREMENTSSoil
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5.4.1.5 PROJECT INSTALLATIONA. CONT
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percent vegetative cover, soil surf
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TRPA Revegetation Plan TemplateSoil
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(c) GRADING AND SLOPE SHAPINGDescri
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TRPA Revegetation Plan ExampleSoil
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• All machinery must be clean bef
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Common NameScientific NameScotchbro
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during dry weather. All debris, roo
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substantially different that the pe
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TRPA BMP HandbookCHAPTER 5: Soil an
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Fertilizer Management PlanProject N
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IV. MONITORINGSurface and groundwat
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I. PROJECT AND SITE DESCRIPTIONGold
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Table 5-1: Description of Revegetat
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SITE TYPE RECOMMENDED SPECIES LISTS
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SITE TYPE RECOMMENDED SPECIES LISTW
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CHAPTER 5: Soil and Vegetation Mana
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TRPA APPROVED PLANT SPECIES ATTRIBU
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TRPA APPROVED PLANT SPECIES ATTRIBU
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CHAPTER 5: Soil and Vegetation Mana
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• Section 6.2 describes methods f
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equirements. At a minimum, training
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Vactor equipment removes sediment a
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Industrial Properties, Marinas, and
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• Rinse the rock with hose water
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EXAMPLE INSPECTION AND MAINTENANCE
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MONITORING PLAN TEMPLATE1. TITLE PA
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MONITORING, INSPECTION, ANDMAINTENA
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Sample Site123 Main StreetSouth Lak
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3. MONITORINGIn 2011, South Lake Ta
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ATTACHMENT BWATER QUALITY DATA
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ATTACHMENT DINSPECTION AND MAINTENC
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• Discharge of stormwater from in
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PAVING SINGLE FAMILY RESIDENTIAL PR
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TRPA Shorezone permit (www.trpa.org
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CHAPTER 8: SHOREZONE PROTECTIVESTRU
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technical guidance on structural an
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Pope has developed a shorezone miti
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ADVANTAGES• Protect parcel develo
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Table 8-3: Categorical Classificati
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generate observable changes in the
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Table 8-5: The General Geomorphic C
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8.1.8.2 TOLERANCE DISTRICT AND BACK
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Figure 8-e: Option 2—Backshore De
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Scenic Resources and project compli
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8.2 BULKHEADS AND LAKE WALLS8.2.1 O
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oth the beach immediately fronting
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Like all BMPs, bulkheads and lake w
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For a bulkhead located such that th
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Figure 8-i: Typical Lake Wall (Grav
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Table 8-9: Advantages and Disadvant
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maintains its position under wave s
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8.3.4 INSTALLATIONAs with bulkheads
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Table 8-11: Advantages and Disadvan
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V t ≥ 5R c2(Equation 4.1)Where:Vt
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8.5 BEACH NOURISHMENT AND REPLENISH
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of not being able to protect the ba
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• The material must be washed to
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nourishment will be determined by m
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8.7 BREAKWATERS8.7.1 OVERVIEWBreakw
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The procedure for determining armor
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8.8 SHOREZONE VEGETATION8.8.1 OVERV
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vegetation. Protecting a tree from
Page 658 and 659:
Overall, dredging can be either a p
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The Pneuma pump is a piece of dredg
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nature of the project and the poten
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8.10 TURBIDITY CURTAINS8.10.1 OVERV
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weights or connected firmly to sand
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Figure 8-o: Turbidity Curtain Desig
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Aquatic invasive species (AIS) also
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tanks into a sewage retention and/o
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• A common problem with recreatio
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8.12 BOAT RAMP CONSTRUCTION AND VEH
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amp at the change of grade. A V-gro
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Figure 8-p: Boat Ramp DesignTRPA BM
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Table 8-22: Overview of Geotechnica
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8.14 SHOREZONE PROTECTIVE STRUCTURE
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8.14.2 ADDITIONAL CONSIDERATIONS FO
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some designated boundary or sphere
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spawning grounds and juvenile nurse
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Marine Science, School of Geoscienc
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Osborne, R.H., et. Al. (1985). Sedi
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8.16 APPENDICES8.16.1 DESIGN CALCUL
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Figure 8-r defines the primary wave
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8.16.1.2 WAVE RUN-UP FORMULA FOR BA
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• Use Equation 16.10 to calculate
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Figure 8-u: Design Wave CasesTRPA B
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Figure 8-v: Wave Setup and Run-Up f
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Alternative methods of wave calcula
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GLOSSARYAccretionMay be either a na
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eaches have no berm, others have se
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DensityMass (in kg) per unit of vol
Page 718 and 719:
Fire Defensible SpaceRefers to the
Page 720 and 721:
Common terms related to land covera
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PermeabilityThe property of a bulk
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ScourRemoval of underwater material
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SlopeThe degree of inclination to t
Page 728 and 729:
Technical Advisory Committee (TAC)C
Page 730 and 731:
ACRONYMSACES - Automated Coastal En
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NPS - Nonpoint SourceNRCS - Natural
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BEsT MANAGEMENT PRACTICEs HANDbooK - Tahoe BMP

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