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shut down for several weeks in May andJune, 2003, including portions of theparking area near the top of the ramp.They will also occupy marina docks andboats on moorings. Working with federaland state personnel, experiments thatseemed to work included gently hosingoff the docks near the sea lions, jinglingcar keys on a key chain, and spinningbuoys on the docks in front of theanimals.It was also learned that the sea lions arehighly intelligent and are able toaccommodate new experiences(spinning buoys) once they realize thatthey will not be harmed or undulyinconvenienced. So, what worked thisweek may not work next week, or nextyear. It is a ongoing problem that mustbe addressed as a moving target. Thiscan be a seasonal problem to someextent, and some years seem to beworse than others. The population of sealions is declining worldwide, but isgrowing in the Monterey/CentralCalifornia coastline areas.Sea Lions on Boarding FloatsSea Lions at Pier 39 Marina - San FranciscoThe sea lions are notorious for fouling any area that they stay in for any length oftime. They can occupy a dock or large boat(s) for days or weeks, and leave behindserious cleanup chores. Therefore, harbor staff must clean the boat ramp, docks,boat slips, etc. in preparation for allowing public use to resume when the sea lionsmigrate to other locations as their available food resources change.......................................................................C3.1 Minimum and Maximum Freeboard under DL only.Commentary:The minimum freeboard is to be sufficient to prevent walers, fender boards andutility lines from being in direct contact with the water surface under still-waterconditions. It is advisable to provide a minimum 4 inch freeboard to the bottom of allwalers and fender boards. This will extend the service life of these dockcomponents that are so exposed to intermittent wet and dry conditions in the splashzone just above the waterline.It is to be understood that these freeboard guidelines are general, and are intendedto address typical recreational boat/berth needs and conditions found in Californiamarinas. Where unique needs and conditions exist, freeboard specifications mayAppendix A -- Section C Commentary - Page 77
need to be altered accordingly. The users should always be kept in mind as well asthe types and sizes of boats that will be berthed in a given marina. A freeboard of24 inches is impracticable at a lake marina that primarily berths only low-profilealuminum fishing boats. 24 inches is too large a step down from the marina deckinto such fishing boats, particularly for senior citizen boaters, but may be perfectlysuited for large yachts and cruisers berthed in urban coastal marinas. The term“freeboard” addresses the vertical distance from the water surface to the marinadeck. However, it also addresses the practical aspects of enabling boaters to be“free” to “board” their boats in consideration of boat type, size, and dock freeboard.......................................................................C3.2 DL + ULLCommentary:Using the DL only minimum freeboard of 14" as a baseline, a dock designer has 4"of freeboard reduction within which to pick up the ULL applied throughout the docksystem without going below a 10" freeboard. This can be addressed throughselection of the flotation pontoon shape, wall thickness, weight, length, width, depth,number and distribution. A cubic foot of fresh water weighs about 62.5#, and a cubicfoot of flotation pontoon weighs about 2.5 pounds. Therefore, each cubic foot ofpontoon displacement will support about 60#. This provides a practical rule-ofthumbthat every 1" of displacement of a 1 ft cube of pontoon flotation will support aload of about 5 pounds.[62.5 #/ft 3 - 2.5 #/ft 3 ] ÷ 12 in/ft = 5# per inch of displacement of a 12"x12"x12" cubeIn coastal marina applications, use 64 #/ft 3 for the weight of salt water.A word of caution is in order here. In some dock designs, the pontoons areattached to the bottom of an open frame such as a steel truss. The decking isattached to the top side of the frame, and the utilities are run through the frame. Thebuoyancy capacity of the pontoons may be entirely adequate to carry 100% of thedesign dead and live loads and fully meet the freeboard requirements. However, ifthe pontoons are fully immersed under full design load, they have no reserveflotation capacity for emergencies. Additional loads can sink the pontoons all theway to the bottom but no additional pontoon buoyancy capacity will be realized.In contrast, some other types of dock systems, such as those built on enclosedpontoons that extend well above the waterline, not only provide the necessaryfreeboard and fully meet the demands of dead and live loads, but also providereserve buoyancy capacity should an emergency need arise.Thus, there are tradeoffs between the various types of dock systems, and theconditions under which they will be expected to perform. Consideration of all of theabove elements is essential to good design and construction of safe and longlasting marina docks.......................................................................Appendix A -- Section C Commentary - Page 78
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Layout & DesiG nGUIDELINESforMarina
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Special AcknowledgmentDepartment of
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D3. Material Pile Types 38D3.1 Conc
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contractors, marina owners and oper
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oarding floatboarding piera platfor
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mean lower low water (MLLW)a tidal
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slopethe inclination of a dock, gan
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SECTION BW A T E R A R E A SB1. Gen
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B4.1.3 In cases where the berth len
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BerthLengths(ft)Table B-6 Single Be
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SECTION B Water Areas - Page 15
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Table B-8DOUBLE BERTH LAYOUT PLANNI
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B5. Minimum Required Number of Acce
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SECTION CB E R T H I N GC1. Dimensi
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C1.2.2 Main Walkways - Maximum Leng
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C2.2.3 ULL of 40#/ft 2 may benecess
Page 34 and 35: definition of “near” cannot bei
Page 36 and 37: C6. PontoonsC6.1 Pontoons in floati
Page 38 and 39: C6.8.2 Circular pontoons load in a
Page 40 and 41: circumstances. Swing moorings work
Page 42 and 43: as a two, three or four-boat maximu
Page 44 and 45: SECTION DG U I D E P I L E SD1. Gen
Page 46 and 47: D3.1 Concrete Piles. Prestressedcon
Page 48 and 49: D3.3.1 Pressure treatment is necess
Page 50 and 51: SECTION EU T I L I T I E SE1. Utili
Page 52 and 53: fueling stations and other marina s
Page 54 and 55: E4.11.2 Dry standpipes have exactly
Page 56 and 57: E5.8 It is highly recommended that
Page 58 and 59: SECTION FS H O R E L I N E S T R U
Page 60 and 61: F2.6.1.3 Openings in guard rails sh
Page 62 and 63: encroachment into the minimum clear
Page 64 and 65: Exception 4.In facilities containin
Page 66 and 67: SECTION GL A N D A R E A SG1. Vehic
Page 68 and 69: G1.3.Minimum Parking Space Dimensio
Page 70 and 71: G2.7 Restroom buildings shall be ba
Page 72 and 73: APPENDIX ASECTIONS B-GC O M M E N T
Page 74 and 75: APPENDIX ASECTION B - WATER AREASC
Page 76 and 77: APPENDIX ASECTION C - BERTHINGC O M
Page 78 and 79: season, nor is it too liberal to me
Page 80 and 81: ...................................
Page 82 and 83: maintained in river environments in
Page 86 and 87: C3.3 DL + LPLCommentary:Using the D
Page 88 and 89: galvanized water tank, for example,
Page 90 and 91: applications. Dock storage boxes in
Page 92 and 93: enter the pontoon. This will dimini
Page 94 and 95: Many RPL product advertisements cla
Page 96 and 97: competent inspection during the man
Page 98 and 99: center of gravity, work well on boa
Page 100 and 101: Extreme Example #1: The original mo
Page 102 and 103: APPENDIX ASECTION D - GUIDE PILESC
Page 104 and 105: casting yard must be diligent to in
Page 106 and 107: driving industry, butt first drivin
Page 108 and 109: APPENDIX ASECTION E - UTILITIESC O
Page 110 and 111: ...................................
Page 112 and 113: structures. With its high expansion
Page 114 and 115: consideration must be given to the
Page 116 and 117: asin water surface areas required f
Page 118 and 119: When potable water lines and hosebi
Page 120 and 121: APPENDIX ASECTION F - SHORESIDE STR
Page 122 and 123: ...................................
Page 124 and 125: surface colors also can have a nega
Page 126 and 127: change in a primary function and co
Page 128 and 129: APPENDIX A - COMMENTARYSECTION G -
Page 130 and 131: ...................................
Page 132 and 133: APPENDIX BADAAG 15.2 / ADA-ABA 1003
Page 134 and 135:
4.8.2 shall not apply to the gangwa
Page 136 and 137:
15.2.3.1 Dispersion. Accessible boa
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inches (1525 mm) wide minimum.EXCEP
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