BEsT MANAGEMENT PRACTICEs HANDbooK - Tahoe BMP

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6.3 Projects 1 to 5 Acres and all Commercial, Industrial, Communications, and Utilities(CICU) ........................................................................................................................................................ 6-36.3.1 BMP Inspection and Maintenance Plan ................................................................................... 6-36.3.2 BMP Monitoring Plan ....................................................................................................................... 6-46.4 Projects Greater than 5 Acres ......................................................................................................... 6-56.5 Maintenance Agreements and BMP-Related Legal Documents ..................................... 6-7CHAPTER 7: PERMITTING ............................................................................................................................................ 7-17.1 Purpose and Use of this Chapter ................................................................................................... 7-17.2 Other Permitting Agencies ............................................................................................................... 7-17.3 Project Components that May Require a TRPA Permit ....................................................... 7-27.3.1 Grading ................................................................................................................................................... 7-27.3.2 Landscaping in a Stream Environment Zone (SEZ) ............................................................. 7-37.3.3 Paving ..................................................................................................................................................... 7-37.3.4 Changes to Land Coverage ........................................................................................................... 7-47.3.5 Tree Removal ....................................................................................................................................... 7-57.3.6 Shorezone Modification .................................................................................................................. 7-57.3.7 Soils/Hydrology Investigations .................................................................................................... 7-67.3.8 Water Quality Improvement Projects ....................................................................................... 7-67.4 Submitting a Permit ............................................................................................................................ 7-67.5 Securities ................................................................................................................................................... 7-77.6 Inspections Schedule ........................................................................................................................... 7-7CHAPTER 8: SHOREZONE PROTECTIVE STRUCTURES AND BMPS............................................................. 8-18.1 Purpose and Use of this Chapter .................................................................................................. 8-18.1.1 Applicability .......................................................................................................................................... 8-28.1.2 Purpose ................................................................................................................................................... 8-28.1.3 Scope ....................................................................................................................................................... 8-28.1.4 Alternative Strategies for Shorezone Protection ................................................................. 8-38.1.5 Protective Structures: Advantages and Disadvantages .................................................... 8-68.1.6 Design Considerations and Planning ........................................................................................ 8-78.1.7 Regulatory Permitting ................................................................................................................... 8-108.1.8 The Physiographic Setting .......................................................................................................... 8-108.1.8.1 Shorezone Tolerance Districts............................................................................... 8-118.1.8.2 Tolerance District and Backshore Delineation Methods (CurrentRegional Standards) ................................................................................................... 8-158.1.8.3 Backshore Setbacks and Buffers........................................................................... 8-188.1.9 Additional TRPA Threshold Standards ................................................................................... 8-188.1.9.1 Dichotomous Key for ‘Permittee Steering” Tool – Wildlife and Fisheries8-198.2 Bulkheads and Lake Walls .............................................................................................................. 8-218.2.1 Overview ............................................................................................................................................ 8-218.2.2 Bulkheads and Lake Walls: Advantages and Disadvantages ....................................... 8-228.2.3 Design Considerations and Planning ..................................................................................... 8-258.2.4 Installation ......................................................................................................................................... 8-278.2.5 Maintenance ..................................................................................................................................... 8-27Table of ContentsTRPA BMP HandbookPage vi 2012
8.3 Static Revetments ............................................................................................................................. 8-308.3.1 Overview ............................................................................................................................................ 8-308.3.2 Static Revetments: Advantages and Disadvantages ....................................................... 8-308.3.3 Design Considerations and Planning ..................................................................................... 8-328.3.4 Installation ......................................................................................................................................... 8-358.3.5 Maintenance ..................................................................................................................................... 8-358.4 Dynamic Revetments .......................................................................................................................8-368.4.1 Overview ............................................................................................................................................ 8-368.4.2 Dynamic Revetments: Advantages and Disadvantages ................................................ 8-368.4.3 Design Considerations and Planning ..................................................................................... 8-378.4.4 Installation ......................................................................................................................................... 8-398.4.5 Maintenance ..................................................................................................................................... 8-398.5 Beach Nourishment and Replenishment ................................................................................. 8-418.5.1 Overview ............................................................................................................................................ 8-418.5.2 Beach Nourishment and Replenishment: Advantages and Disadvantages .......... 8-418.5.3 Design Considerations and Planning ..................................................................................... 8-428.5.4 Installation ......................................................................................................................................... 8-468.5.5 Maintenance ..................................................................................................................................... 8-468.6 Jetties ...................................................................................................................................................... 8-488.6.1 Overview ............................................................................................................................................ 8-488.6.2 Jetties: Advantages and Disadvantages ............................................................................... 8-488.6.3 Design Considerations and Planning ..................................................................................... 8-498.6.4 Installation ......................................................................................................................................... 8-508.6.5 Maintenance ..................................................................................................................................... 8-508.7 Breakwaters .......................................................................................................................................... 8-518.7.1 Overview ............................................................................................................................................ 8-518.7.2 Breakwaters: Advantages and Disadvantages ................................................................... 8-518.7.3 Design Considerations and Planning ..................................................................................... 8-528.7.4 Installation ......................................................................................................................................... 8-538.7.5 Maintenance ..................................................................................................................................... 8-538.8 Shorezone Vegetation ..................................................................................................................... 8-558.8.1 Overview ............................................................................................................................................ 8-558.8.2 Shorezone Vegetation: Advantages and Disadvantages .............................................. 8-558.8.3 Design Considerations and Planning ..................................................................................... 8-568.8.4 Installation ......................................................................................................................................... 8-568.8.5 Maintenance ..................................................................................................................................... 8-578.9 Dredging ............................................................................................................................................... 8-588.9.1 Overview ............................................................................................................................................ 8-588.9.2 Dredging: Advantages and Disadvantages ......................................................................... 8-598.9.3 Design Considerations and Planning ..................................................................................... 8-598.9.4 Installation ......................................................................................................................................... 8-648.9.5 Maintenance ..................................................................................................................................... 8-648.10 Turbidity Curtains ............................................................................................................................. 8-658.10.1 Overview ............................................................................................................................................ 8-658.10.2 Turbidity Curtains: Advantages and Disadvantages ........................................................ 8-658.10.3 Design Considerations and Planning ..................................................................................... 8-668.10.4 Installation ......................................................................................................................................... 8-68TRPA BMP HandbookTable of Contents2012 Page vii
Page 5 and 6: PREFACEThe Tahoe Regional Planning
Page 7 and 8: TABLE OF CONTENTSPREFACE...........
Page 9: 3.5.5 Stormwater Treatment ........
Page 14 and 15: 8.10.5 Maintenance ................
Page 16 and 17: Table 8-4: Federal, State and Regio
Page 18 and 19: Figure 4.3-i: Vegetated Swale .....
Page 20 and 21: INTRODUCTIONPURPOSE AND USERS OF TH
Page 22 and 23: Lake Tahoe’s world renowned blue
Page 24 and 25: Urbanization in the Lake Tahoe wate
Page 26 and 27: 50 percent of the light scattering
Page 28 and 29: Figure I-c: Impervious Cover versus
Page 30 and 31: Disconnected impervious areasdrain
Page 32 and 33: POLLUTANT EFFECT URBAN SOURCES ASSO
Page 34 and 35: BEST MANAGEMENT PRACTICESHistorical
Page 36 and 37: Table I-2: Differences in BMP Retro
Page 38 and 39: CHAPTER 1: URBAN HYDROLOGY1.1 PURPO
Page 40 and 41: Figure 1-a: Runoff ProcessesTRPA BM
Page 42 and 43: Although many urbanized areas face
Page 44 and 45: watersheds to make the necessary es
Page 46 and 47: Pollutant load estimates are typica
Page 48 and 49: differ from the following recommend
Page 50 and 51: Figure 1-b: Hydrologic Processes an
Page 52 and 53: 1.3.3.2 NRCS BMP CALCULATION SPREAD
Page 54 and 55: 1.3.3.3 RATIONAL METHODMODEL SUMMAR
Page 56 and 57: 1.3.3.4 LOAD REDUCTION PLANNING TOO
Page 58 and 59: in HMS may be event-based or contin
Page 60 and 61: 1.3.3.6 POLLUTANT LOAD REDUCTION MO
Page 62 and 63:
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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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
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LIST OF FIGURESFigure 4.3-a: Curb B
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APPLICABILITY• Culverts are appli
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deterioration. The inspection crew
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APPLICABILITY• Curb and gutters a
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INSTALLATION CONSIDERATIONS• Inst
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Figure 4.3-b: Rolled CurbChapter 4:
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Advantages• Prevents the discharg
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Table 4.3-2: Storm Drain Inspection
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Advantages• Prevents scour that m
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Figure 4.3-c: Outlet ProtectionChap
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• The structure can be designed t
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INSTALLATION CONSIDERATIONS• Disc
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Advantages• Assists in the contro
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Figure 4.3-e: Slotted Channel Drain
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Advantages• May be less expensive
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Table 4.3-5: A/C Swale Inspection a
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• Prevents property damage, slope
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Figure 4.3-g: Subsurface DrainChapt
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abrasives applied during the winter
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Table 4.3-7: Rock Lined and Vegetat
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Figure 4.3-i: Vegetated SwaleChapte
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Check dams installed in water sprea
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• Design check dams perpendicular
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CONTENTS4.4 Stormwater Treatment ..
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4.4 STORMWATER TREATMENTThe primary
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4.4.1.1 WET BASINAlternative Names:
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• Surcharge storage above the wet
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Table 4.4-1: Wet Basin Inspection a
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Figure 4.4-a: Wet Basin (Concept Dr
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4.4.1.2 BIOSWALEAlternative Names:
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• Consider incorporating trees or
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Figure 4.4-b: Bioswale (Linear Basi
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4.4.1.3 DRY BASINAlternative Names:
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• Drainage design standards for t
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Figure 4.4-c: Detention BasinTRPA B
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4.4.2 FLOW THROUGH TREATMENTFlow-th
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4.4.2.1 DROP INLET INSERTAlternativ
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INSTALLATION CONSIDERATIONS• Refe
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4.4.2.2 TRASH RACKAlternate Names:
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4.4.2.3 BAFFLED VAULTAlternative Na
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• Ensure that site conditions all
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4.4.2.4 HYDRODYNAMIC SEPARATORAlter
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• Most units are designed to be c
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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
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Fire Defensible SpaceRefers to the
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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
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Technical Advisory Committee (TAC)C
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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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