Elevation= 311 ft

LUU tt

300 ft

Whatcom Creek outlet

/

111 Spokane

ct'-"'-~'•

NOTES·

In Ju l~ uf 1 >l99 the LIS Bureau of Reclarn<1hon conducted a batt1yrnelr1c survey o f Lake v\lhatcom to Cevelop reservoir topography and compute area-capacity relat1onsh1ps After establishing a horizontal and vertical control survey the bathymetnc soundings were collected bV a boat with an Integrated depth sounder and real time Kinematic GPS receiver This setup yleldeo typical accuracies 012 centimeters horizontal ly and 3 centimeters Jert1cauy continuous sets of data points were col lected along transects spaced about 200 feet apart running perpendicular to the centerline of the lake The data was collected at a lake surface elevation of 314 3 feet which 1s near the maximum of the 311 to 314 5 foct range main1ained by the City of Bellingham The lake surface as depicted on this map has been set at 311 feet

In November of 20CO as a component of the Dureau of Reclamation efforts the 'vVhalcom 8ounty Public \Narks Department contracted lo have the above water topography mapped around the lake This mappmg effort accomplished usn-ig trad1!1011al phologra1nmelr1c techrnques µ-ov1ded 2 fool contours and plarnmelnc data for features along the shoreline to an elevation of about 320 feet (1ncl ud1ng the docks and building footp rints depicted on this map 1

L A

Strawoerry Sill Depth - 36 ft

_)

+

KE

NORTH RtlS/i\ :.1 DE"'T/.-f - 2ot'i Fr

w B A T H \1' J\i1 E T R I C

H ~1 AP &

I I Sunnvs1de Sill Depth= 203 ft

C1t1 of Bellingham GIS staff converted the ba \hymelr1c suu11d111gs and 2 fool above water con tours to a D1g1ta l Elevation Model (DEM) The bathymetr1c DEM was then merged with USGS I O meter resolution DEM data to create a seam less representation of bathymetnc and upland areas Shaded re11e1 was genera1ed usJng a multi directional hlllshade algorithm weighted to'Nards a sun az1mu1h oi 315 degrees and an lllumlnatlon angle 0150 degrees above the horizon

The Bathymetnc Profile follows the centerline of Lake Whatcom from the Anderson creek inlet to the L/liheitcom creel< outlet Vertical exaggerot1on of the profile= 7x

All other basemap data are from the City of Bellingham and \J\lhatcom County GIS data~ases

Map projection and 10 000 fool gnd based on \/Vash1ngton Glateplane Nocth Zone North American Datum of 1927 and the Clarke 1866 Spheroid All elevations correspond to the City of Belhngham's vertical datum ..vh1ch 1s 5 69 feet higher than the revised North An1encan Vertical Datum of 1929 and 2 ~feet higher than the Nrnth An1encan Vertical Datum of 1988

This map was ong1nal1y published in 2000 usmg data derived from the 'Bathymetnc f\.1ap of Lake VV'r at com' drawn 1n 1970 by J R Morrell of IA'estern Vl/ashmglon Uni ve rsity's Institute for Freshwater Stl.d1es

North Basin #3 Depth = 266 ft

SCALE 1 :12,000 0 J 0 lb

0 0 25 05 0 75

Contour Interval= 20 ft Supplemental Bathymetnc Contours at 10 ft

!l.11les

Kilometers

Intervals

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PROFILE Anderson Creek in let

I

\ South Bas in t:-3 Depth :: 328 ft

C Behee 2002