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QQ uu aa rr tt ee rr mm aa ss tt ee rr HH aa rr bb oo rr
D o c k t o nD o c k t o n
Eelg
rass
Hab
itat (
DN
R)
30
6
18
30
Do ckto n B eac h P ark Mar ina (Kin g C ou nty)
Eelgrass Habitat(DNR)
6
18
E
EE
Herring
Spa
wnin
g Are
a (W
DFW
)
1:1,200Map updated 2/28/2013 by Mac McKay.
8
6
9
7
4
31
5
2
M aury Is
. Aqu
atic Reserve
-
Va
sho
n I
s la n
d
Ma u r y I
s l a n d
0 100 200 300 Meters
E
0 500 1,000 Feet
Quartermaster Harbor, Page 5, Dockton
Imagery: 2011 Washington orthophoto, 3 foot resolution (NAIP)Depth contours (feet), 0 = MLLW (NOAA)
Platted LineAquatic Reserve Boundary
Protracted Line
ShorelineMean Low Tide
!
!
!Extreme Low Tide
\
\ Meander LineMeander Line approximation (no data)?
?
The Maury Island Aquatic Reserve includes the tidelands and bedlands of navigable waters owned by the state of Washington as described in the legal description. The legal description can be found at
The reserve boundary is illustrated by the following lines: http://www.dnr.wa.gov/ResearchScience/Topics/AquaticHabitats/Pages/aqr_rsve_maury_island.aspx
Herring Data (WDFW)Adult Holding Areas
King County Parcels 2012
Generalized eelgrass location (DNR)
!5 Buoy Inventory 11/7/2011 and 11/10/2011Buoy Inventory May 4, 2011!5
Swing radius without boat. Scope = 1.5
Swing radius with boat. Scope = 1.510ft mooring line assumed.
Spawning Areas
Extreme care was used duringmap compilation to ensure accuracy.However, due to the need to rely onoutside sources for information andchanges in ownership, the Departmentof Natural Resources cannot acceptresponsibility for errors or omissionsof data. Therefore, no warrantiesaccompany this data.
Aquatic Resources DivisionPhone 360-902-1100Fax 360-902-1786Email ard@dnr.wa.gov1111 Washington St. SE MS 47027Olympia, WA 98504-7027
Vessel Swing Radius, Scope = 1.5
22
Anchor line length and vessel swing radius calculated as follows:
Measured depths were adjusted by adding an assumed 1foot depth-finder transducer offset and the tidal height for each buoy site.
Using tide data from the National Oceanic and Atmospheric Administration website (http://tidesandcurrents.noaa.gov), depth relative to the tidal datums was corrected for each buoy using the following datum information:
The extremes were then used to find anchor line length and swing radius by the following formulas:
Anchor line length (L) = SCOPE x EHT where SCOPE is the ratio of anchor line length to water depth. Washington State Parks recommends a scope between 4 and 7 feet of anchor line for every footof water depth. SCOPE = 1.5 was used in these calculations.
Swing Radius = √ (L ) - (ELT ) + mooring line (10ft assumed) + vessel length
These formulas are described in the brochure: "How to Moor Your Boat On State-Owned Aquatic Lands"
These results are based on Tacoma tide data and an assumed 1foot depth-finder transducer offset. Various sources of error including tide prediction error and variation in the position of the depth sounder relative to the mooring buoy anchor are not considered here.
12.39 Mean Higher-High Water (MHHW) 0.58 Mean Lower-Low Water (MLLW) 0.00 Station Datum15.15 Highest Observed Water Level (EHT) -4.11 Lowest Observed Water Level (ELT)
Station: 9446484Name: Tacoma, WAUnits: FeetTidal Epoch: 1983-2001
Image source: http://www.dnr.wa.gov/Publications/aqr_mooring_buoy_brochure.pdf
MHHW Mean higher high water tidal datum
MLLW Mean lower low water tidal datum