SVPA-37

SVPA-37: SE Fish Hatchery Rd at Snoqualmie Falls Golf Course

Status	ACTIVE
Upstream	USGS-38 Below the Falls
Downstream	SVPA-34 The "T"

Located north of the back parking lot.

Attributes

• Est. 2019
• Dry when not flooding
• Mounted from 4x4 post

Installation Notes

Problems and Considerations (May 2020)

• Sensor Height – mount at current height or higher (> 11.31’).
  • Cantilever arm must be level and static.
  • Unsure of 60’ flood height at this location.
  • Currently sensing concrete wall, mount out over edge of concrete pad for best readings.

• RSSI issues – Removed indoor receiver from this location. poor RSSI since this location is far from receiver.
  • Mount transmitter and antenna as high as possible (use existing telephone pole?)
  • Mount transmitter and sensor separately.
  • Use 30’ sensor with longer cable.

• Access issues – location is immediately adjacent to parking lot, but height and position over ditch poses problem.
  • Transmitter is virtually inaccessible as it is now.
  • If transmitter is mounted separate from sensor, both will need to still be accessible for battery changes, maintenance.
  • Ladder will not fit in concrete pad below sensor – spread too wide.

• Sensing Cone Issues – the cone of detection is very wide at the ground level.
  • Sensor should be mounted at minimum height requirements to minimize size of cone.
  • Vegetation (knotweed) will need to be maintained.
  • Sensing cone least 37.91” (diameter of cone at ground level).

Links

• Floodzilla
• Google Map