HARBOR SYSTEM MASTER PLAN - City and Borough of Sitka

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Sealing Cove Harbor Existing Systems The electrical systems at the Sealing Cove Harbor consist of power distribution, lighting, and communications. The entire facility incorporates lighting with power available to most of the vessels, and power available to select vessels. The power and lighting systems are owned and maintained by the City and Borough of Sitka, while the communications systems (telephone and TV) are owned and maintained by the utilities, ACS and GCI. The facility was constructed in 1983 with minor modifications since. Power Distribution System: The power system includes two service feeders to the harbor with single phase utility transformers at the head of each approach and ramp. The transformers are pole mount type sitting on concrete pads inside fiberglass enclosures. Both transformers feed 120-240 volt, single phase power directly to main distribution panels (P1 – East end and P2 – West end) on the gangway floats. The feeders are composed of a four inch conduit with 3 No. 500 MCM and one No. 2/0 AWG ground from the transformers to junction boxes beneath the approaches, and with two No. 4/0 AWG, 4 conductor, type W cables to the main distribution panels. Each service has a feeder capacity of 115 KVA. There is a spare 4 inch conduit from the transformer to the junction box beneath each approach dock. The distribution panels include 400 ampere main circuit breakers with sub feeder circuit breakers protecting the circuits to the shore-tie pedestal and lighting loads. The systems are bonded to ground at the main distribution panels with single ground electrodes suspended from the gangway float into the water. The panels and circuit protection equipment was manufactured by Square D. The main distribution panels are mounted on frames fastened to the gangway float, utilizing hot-dipped galvanized steel. The pole supporting the luminaire for the gangway float is incorporated into this frame. The feeders from the main distribution panels are composed of 100 and 70 ampere, two pole circuit breakers protecting 4 conductor, No. 1/0 AWG Type W cables, and 60 ampere, two pole circuit breakers protecting 4 conductor, No. 2 AWG Type W cables to the shore-tie pedestals. The lighting is composed of 20 ampere circuit breakers protecting No. 6 AWG conductors. The feeder cables to the shore tie pedestals are routed through a trench incorporated into the Head Walk float. On the Main Walk Floats A through F, and the diagonal portion of the Head Walk float, the cables are routed in 2 inch diameter, PVC conduits embedded in the float concrete from pedestal-to-pedestal. The feeders to the lighting system are routed up stationary steel poles mounted to the gangway floats where they transition to messenger supported No. 6 triplex cable. The triplex cable is suspended from the pilings with taps to luminaires, also mounted near the tops of the pilings. Shore-tie Pedestals: 134 Sitka Harbor System Master Plan Condition Inventory
The shore-tie pedestals were manufactured utilizing marine grade aluminum for the enclosures. The enclosures are configured with three parts, the main support post and two meter/shore-tie power heads. The main post is a nominal 8 inches x 10 inches cross sectional dimension and encloses the terminal lugs for the feeder cables. The power is circuited from these terminal lugs to each power head meter. Within the power heads, the utility meter is circuited to protecting circuit breakers and shoretie receptacles. All of the circuit breakers were originally rated for 20 amperes while the receptacles were rated for 30 amperes. Some devices along the diagonal Head Walk have been replaced with higher rated units. The meters are utility grade, 4 jaw meters suitable for revenue reading. The pedestals are fastened to both the float and the bull rail. Uplands Lighting: The parking area and boat launch ramp are illuminated with street type luminaires mounted on 30 foot tall tapered steel poles along the shoreline. The luminaires originally utilized 250 watt high pressure sodium lamps. They are spaced at 130 foot intervals. The poles at the gangway approaches and at the launch ramp include two fixtures each. Each fixture is controlled by an integral photoelectric cell. The uplands lighting is powered from the transformer at Approach Dock 2 (West end). Gangway Lighting: The covered gangways are illuminated with fixtures mounted to the roof structure at a spacing of 22 feet apart. The luminaires are circuited with conductors in steel raceway fed via conductors in flexible conduit. The circuits originate from the main distribution panels. The luminaires utilize 50 watt high pressure lamps. Each gangway circuit is controlled by a photoelectric cell located on the gangway. Harbor Lighting: The lighting system is composed of luminaires mounted near the top of the pilings with a spacing of approximately 80 feet. As noted above, the luminaires are powered from aerial cables suspended just above. The luminaires are mounted on a short steel pipe bracket at elevation 25 ft, nominal. The original luminaires were manufactured by Thorn utilizing nonmetallic enclosures. These fixtures have been subsequently replaced with a street-light type with a flat cut-off lens. The original luminaires utilized 70 watt high pressure lamps. It appears that the current 135 Sitka Harbor System Master Plan Condition Inventory
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CITY AND BOROUGH OF SITKA, ALASKA H
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PART I SITKA HARBOR SYSTEM CONDITIO
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TABLE OF CONTENTS
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SECTION 1—EXECUTIVE SUMMARY
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consistent maintenance procedures,
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CITY AND BOROUGH OF SITKA HARBOR SY
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SECTION 2—HARBOR FACILITIES CONDI
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hinge connection assemblies are ext
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Timber Mainwalk Float Rotten Timber
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7 C Y T I D E C E N A D M E B TIDAL
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Sitka Harbor System Master Plan Con
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THOMSEN HARBOR Thomsen Harbor was o
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17 Sitka Harbor System Master Plan
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2 THOMSEN HARBOR IN-KIND REPLACEMEN
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SEALING COVE HARBOR Sealing Cove Ha
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SEALING COVE HARBOR PHOTOGRAPH LOG
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3 SEALING COVE HARBOR IN KIND REPLA
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ELIASON HARBOR Eliason Harbor, once
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ELIASON HARBOR PHOTOGRAPH LOG Vehic
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4 ELIASON HARBOR IN KIND REPLACEMEN
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ANB HARBOR ANB Harbor was designed
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ANB HARBOR PHOTOGRAPH LOG Timber Ap
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5 ANB HARBOR IN KIND REPLACEMENT BU
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THOMSEN HARBOR BREAKWATER FLOAT The
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C Y T I D E C E TIDAL DATA EHW EHT
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O’CONNELL BRIDGE LIGHTERING FLOAT
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C Y T I D E C E TIDAL DATA EHW EHT
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CRESCENT HARBOR LIGHTERING FLOAT Th
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C Y T I D E C E RUBBLE MOUND BREAKW
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FISHERMAN’S WORK FLOAT The Fisher
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FISHERMAN’S WORK FLOAT PHOTOGRAPH
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9 FISHERMAN'S WORK FLOAT IN KIND RE
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FISH CLEANING FLOAT PHOTOGRAPH LOG
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10 FISH CLEANING FLOAT IN KIND REPL
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CRESCENT HARBOR BOAT LAUNCH RAMP PH
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11 CRESCENT HARBOR BOAT LAUNCH RAMP
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. SEALING COVE HARBOR BOAT LAUNCH R
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12 SEALING COVE HARBOR BOAT LAUNCH
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CRESCENT HARBOR HIGH LOAD DOCK & NE
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C Y T I D E C E CRESCENT HARBOR MOO
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BOAT GRID The Sitka Boat Grid was o
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Grid Timbers Rotted Pile Top Access
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14 BOAT GRID IN KIND REPLACEMENT BU
Page 93 and 94: MARINE SERVICE CENTER PHOTOGRAPH LO
Page 95 and 96: 15 MARINE SERVICE CENTER BULKHEAD I
Page 97 and 98: SEAPLANE FLOAT PHOTOGRAPH LOG Seapl
Page 99 and 100: 16 SEAPLANE FLOAT IN KIND REPLACEME
Page 101 and 102: Sitka Harbor System Master Plan Upl
Page 103 and 104: Purpose and Scope This report prese
Page 105 and 106: Sealing Cove Harbor Restrooms #1 Lo
Page 107 and 108: O’Connell Bridge Lightering Float
Page 109 and 110: ANB Harbor Restroom #3 Location: AN
Page 111 and 112: Thomsen Harbor Harbor Department Of
Page 113 and 114: Sitka Harbor System Master Plan Con
Page 115 and 116: Figure 18. Site conditions. Figure
Page 117 and 118: Figure 22. Site conditions. Figure
Page 119 and 120: SECTION 4—ELECTRICAL CONDITION IN
Page 125 and 126: Eliason Harbor Existing Systems The
Page 127 and 128: The “generic” shore-tie pedesta
Page 129 and 130: Findings As noted above, the electr
Page 131 and 132: The terminal box is mounted to a ga
Page 135 and 136: 7. The shore-tie pedestals in this
Page 137 and 138: ANB Harbor Sitka Harbor System Mast
Page 139 and 140: The finger floats include shore-tie
Page 141 and 142: Boat Grid Katlian Street Existing S
Page 143: Seaplane Float Katlian Street Sitka
Page 147 and 148: The main distribution panel support
Page 149 and 150: Renovate all of the shore-tie pedes
Page 151 and 152: The panel board is a 200 ampere, si
Page 153 and 154: Recommendations The following items
Page 155: PART II MOORAGE RATE RECOMMENDATION
Page 158 and 159: 1.1 Sitka Harbor Facilities .......
Page 160: The City and Borough of Sitka (CBS)
Page 163 and 164: Sitka’s harbors have 1,126 perman
Page 165 and 166: Operating revenues Fiscal Year 2007
Page 167 and 168: Yacht Reserved Moorage Revenue ($1,
Page 169 and 170: This section presents our moorage r
Page 171 and 172: It is our understanding that the ha
Page 173 and 174: Required Permanent Annual Moorage R
Page 175 and 176: Working Fund Balance (Millions of $
Page 177 and 178: Inflation Rate (%) Annual Rate Incr
Page 179 and 180: Figure 6 shows a history of raw fis
Page 181 and 182: CBS collects a fish box tax from ch
Page 183 and 184: Harbors Permanent Annual Transient
Page 185 and 186: fewer through the provision of tech
Page 187 and 188: Alaska Department of Fish & Game (A
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HARBOR SYSTEM MASTER PLAN - City and Borough of Sitka

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