Situated in the heart Washington’s Pend Oreille County, Diamond Lake is one of many sparkling bodies of water belonging to the Evergreen State. Centuries ago, sand and gravel dislodged from a glacier to form a natural dam, which in turn created the freshwater lake that exists today. Diamond Lake is mostly spring fed, and drains into Moon Creek – which then carries the water to Sacheen Lake and the Little Spokane River.

Diamond Lake Statistics

Lake Type: Natural Freshwater Lake, Not Dammed
Surface Area: 800 acres
Shoreline Length: 7 miles
Normal Elevation: 2,340 feet
Average Depth: 27 feet
Maximum Depth: 58 feet
Water Volume: 21,600 acre-feet
Drainage Area: 17 sq.miles

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dimage002In 2013, in continuing efforts to control Eurasian Watermilfoil (EWM), Yellow Flag Iris, Fragrant Water Lily and Reed Canary Grass around Diamond Lake, Lakeland Restoration Services, with the direction of the Diamond Lake Improvement Association treated 12 acres for EWM.

LRS believes, unless undocumented infestations of EWM are found, the majority of continued efforts should be directed at controlling YFI infestations along the outlet and the lake.

For the 2014 treatments and surveys LRS has been contracted by the Pend Oreille Conservation District. LRS will work closely with the POCD and the DLIA.


LRS believes thatEWM treatment for 2014 should be minimal, DLIA divers may be able to control EWM by hand pulling. An entire lake survey for EWM may not be necessary for the 2014 season.

LRS has provided prompt and accurate service to Diamond Lake, conducting successful aquatic and riparian restoration projects. We welcome the opportunity to advise and conduct ongoing restoration projects at Diamond Lake.

Bulletin Board

Diamond Lake Project is completed.

2014  EWM Treatment map,

areas may be expanded

Treatment for
Yellow Flag Iris
will begin on
August 18, 2014
& August 19, 2014

Millfoil Treatments will
start on August 20, 2014

Diamond Lake
Beach Blanket
Bingo Contest

We had such a good time
viewing the pictures.
We hope this is something
we can do at every lake.
Thank you for the support!
Listed are the contestant photos,
if you see yours please email
us at This email address is being protected from spambots. You need JavaScript enabled to view it.


This email address is being protected from spambots. You need JavaScript enabled to view it.
with your name and address.
We have a thank you gift
for those that participated
we would like to send you!


Beach blanket bingo contest
information for Diamond Lake



Projected Treatment 

Diamond Lake treatment to start
August 18, 2014.
Check back for updates.

Residential Letter 2014

Shoreline Posting

call (877) 273-6674

or email  This email address is being protected from spambots. You need JavaScript enabled to view it.