CW3E id: GPO
CDEC id: GPO
NWS id: --
Lat/Long: 37.907655 / -119.953053
Elevation: 1312m
Team Lead: Douglas Alden
Install Date: March 10, 2022
Permit Expires: --
Watershed: Tuolumne
Telemetry: Cell
Land Owners: Hetch Hetchy Water & Power
Permit Type: Handshake
Site Type: RadMet

SurfaceMet and RAD-Met have been installed in close proximity at two locations.  Site is owned by Hetch Hetchy Water & Power (HHWP).

RAD-Met

  • RAD-Met is located on top of a penstock roof adjacent to the Granite Portal valve house.
  • Power connection was installed by HHWP electricians and runs to the system through rigid metal conduit from a breaker box in the valve house into the bottom of the enclosure.
  • The enclosure stand ( photo ), MRR tie downs ( photo ), disdrometer stand ( photo ) are attached the concrete roof deck with concrete anchors installed by HHWP electricians.
  • The MRR is mounted on METEK's aluminum tripod. MRR heater power runs through rigid metal conduit from the bottom of the enclosure to a junction box next to the MRR tripod. It was installed by HHWP electricians ( photo ). Three conductors (black [hot], white [neutral], and green [gnd]) run through the conduit to the junction box. At the junction box the conductors are wire nutted to a short piece of neoprene jacketed wire that connects to the MRR heater ( photo ). The neoprene jacket wire exits the bottom of the junction box through a cable gland and is covered with split loom ( photo ).  The MRR data cable exits the bottom of the enclosure through a cable gland. The data cable runs along the outside of the rigid electrical conduit used for the MRR power. Excess cable is coiled at the MRR tripod.
  • The disdrometer power/data cable runs through rigid metal conduit from the bottom of the enclosure to a junction box next to the disdrometer stand ( photo ).  The cable goes into the junction box and exits the bottom through a cable gland.   The cable is continuous through the junction box. The cable is covered with split loom from the junction box to the sensor.
  • There is no RF link to the SurfaceMet at this site as would be typical for a RAD-Met because we do not have line of site. The SurfaceMet has its own cellular modem.
  • GPS antenna and cellular antenna are mounted to the enclosure stand ( photo ).

SurfaceMet

  • The SurfaceMet is located some distance uphill from RAD-Met installation. The site is a burn scar from 2016 and is located on a terrace some distance from the top of the hill. The hill continue to rise to the east of the site ( photo ). The terrace sits on a ridge and has good exposure to the south ( photo ), west ( photo ), and north ( photo ). This may change has the vegetation grows back from the 2016 fire.



Tasks

Due Owner Created By Details
-- -- Hart Wanetick MRR_tracking:_https://docs.google.com/spreadsheets/d/1OQ-SXmHUTv0w-Le3AD9F2DGI0ca5GsflaLu31lyvjKg/edit?usp=sharing Disdrometer_tracking:_https://docs.google.com/spreadsheets/d/1cSy5cL6ekDed0hQw_Z_lpkHdihmHBYTLItSFT7gsXEA/edit?gid=0#gid=0


Sensors

TypeLabelModelSNInstalled On
Air Temperature/Relative Humidity--HygroVue10LE 12 9GXMarch 10, 2022
Anemometer--RM Young 05108171229March 10, 2022
Barometer--CS106S1230214March 10, 2022
Disdrometer--OTT Parsivel2410960March 10, 2022
GPS--Septentrio PolaRx5e4801098March 10, 2022
MRR--METEK MRR2051208 7778 (RDCP) 051208 7780 (Heater Box)March 10, 2022
Pyranometer--CS3202242March 10, 2022
Tipping Bucket--TE525MM--March 10, 2022


Other Equipment

TypeLabelModelSNInstalled On
ComputerNoneOnLogic Neousys Rugged Intel Coffee Lake Low Profile FanlessK0706745/U744655March 10, 2022
UPSNoneTripp Lite Internet550UBC87F4March 10, 2022
Cell ModemRAD-MetSierra Wireless RV552T1204735601B118March 10, 2022
Cell ModemSurfaceMetRV50LT90340247021036March 10, 2022
GPS AntennaNoneTallysman Wireless VP6000VP6050C 20200221 0033March 10, 2022


Visits

OnSummary
Dec. 10, 2024Reinstalled MRR electronics
Dec. 9, 2024Install MRR dish and transceiver
Aug. 19, 2024MRR transceiver and dish removed
Feb. 1, 2022General Maintenance


Funding Sources

None