Andy and John standing on the cleared site.
View to the north.
Close up of utility boxes.
Close up view of solar panels.
View to the northeast.
Tumwater Hill (TWHL) site is located on Tumwater Hill, Tumwater, Washington.
The city of Tumwater provided permission to install a continously operating site near the Tumwater elementary school.
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.
KTBW is part of a radio telemetry (FreeWave) subnetwork that feeds into the Pierce
College hub. It is also used as a rely for other sites within the subnetwork.
Click here to
see a map of the subnetwork.
The monument 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.
|
Andy and John standing on the cleared site. |
View to the north. |
|
Close up of utility boxes. |
Close up view of solar panels. |
|
View to the northeast. |