Nisqually Rapid Geodetic Reponse

Charles Pack Experimental Forest Site (CPXF)

Pack Experimental Forest site is located on the Charles Pack Experimental Forest station, operated by the University of Washington. The site is located about 5 km southeast of Eastonville, Washington.

With help from SCIGN and UNAVCO, we installed a smaller, hand-drilled geodetic monument, known as the short drilled-braced geodetic monument. The monument design is perfect for rapid installations of continuous GPS sites. Data collection started on March 15, 2001. CPXF is part of a radio telemetry (FreeWave) subnetwork that feeds into the Pierce College hub. Click here to see a map of the subnetwork.

It consists of 1-inch diameter stainless-steel rods forming a quad-pol that stands about 3 feet above the ground surface and is anchored 3 to 6 feet into bedrock. A generator- powered handhelp rotary drill using a 1.5-inch diameter drill bit is used to prepare the holes. Epoxy is used to anchor the stainless-steel rod in the holes.

Photographic Catalog

Checking angle drill hole with brunton compass	Northwest view of CPXF
View towards the west	Installing Yagi antenna for radio modem communications