[Jim MooreParticipant]

SL150 stopped uploading because it ran out of money.  That has been corrected and GMI will be taking over maintenance of that station as well as SL149 at Moores rd.

[David BresslerParticipant]

All sensor station users, please consider making it a part of your general process to read over Carol’s weekly reports and respond to her comments accordingly (e.g., Jim Moore’s response re cell plan that ran out but has been renewed).

Thank you Carol for your thorough reporting on sensor stations throughout the region!

[Jim MooreParticipant]

Dave,  in reply to your comment about sensor cleaning.  I don’t use the pin.  I put an end cap on the sensor bundle with a small hole to let the air out and pull it out with the armored anti-beaver cable and wipe the turbidity sensor – much easier that way!  I have noticed that there is no obvious scum on the turbidity sensor but after I wipe it the readings typically drop to 3-4 NTU.

[Carol ArmstrongParticipant]

Report from 4/19/19

SL116-West Portal B – Turbidity has been consistently very elevated during the winter and spring and is now >150 NTU.

SL118-Wissahickon – Battery is problematic; down to 3.17v and varies very frequently.  Turbidity has risen and is 50-75 NTU.

SL130-W Branch Red Clay- Turbidity is 300-450 NTU and sensors should be checked as turbidity is high enough to indicate they are embedded/enclosed by debris and/or sediment.

[Mike BullardParticipant]

SL 114 CTD’s pressure transducer was irreversibly damaged on jan 02 2018 while encased in ice.   Dynamic range may still be OK, but still should be replaced.

Attachments:

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[David BresslerParticipant]

@bullard for SL114 we can get you a replacement CTD sensor without charge (as a DRWI station); however, we won’t be able to replace again.  If you can work with the current depth measurements via an offset then you cold hold off on the replacement possible, but it’s your call – we (@hicks, @johnson) can get a replacement to you if you’d like.

[Carol ArmstrongParticipant]

Report from 4/26/19.  Regular cleaning of sensors is an automatic part of station management, and even the USGS with enclosed sensors and automatic cleaners try to achieve weekly site visits for maintenance of sensors.  Some sites cannot be cleaned during a storm event, and even sites that become fouled very easily can yield good data for discharge curves and sediment/pollution loads if the sensors are cleaned regularly and/or right before a storm event.

SL118-Wissahickon – Battery needs attention as it is declining; ranging from 3.06-3.62 v which is below the recommended level for sensor stability.

SL131-Little Lehigh – No signals since 4/16.  Could you update the status of the station?

SL133-Upper Paulinskill – Consider checking battery; it dropped to 3.46v but recovered to 4.05v.

SL137-UT to Cobbs – Sensors appear to be embedded in sediment/debris based on turbidity.

[Carol ArmstrongParticipant]

This is the report for 4/29/19.  All stream/station now list the baseline turbidity for that site, to help you identify whether turbidity elevations during baseflow indicate the need for cleaning.  The baseline turbidity NTU appears in the header of the history of each site that follows the tables.  Baseline was reasonably estimated by examining turbidity patterns after installation.

@lawler SL101(Musconetcong U) Turbidity has risen to 1300-1400 NTU and sensors may be packed or embedded.  This site fouls easily, but the extent of fouling could possibly cause damage.

@bilger SL117(SandyRun) The battery is in a pattern of decline (~3.6 v) which is below recommended level for logger stability.

@bilger SL118(Wissahickon) The battery here also needs to be checked as it is 3.1-3.2v, and recharged. Check for moisture on the battery and inside the Pelican box.

@madden  SL122(Buckwha D) Sensors were naturally cleaned but need more cleaning as turbidity is well over 10 x the natural level at baseline flow.  Sensors do not appear to have been cleaned this winter and spring.

@ebel SL131(Little Lehigh) Any update on this site?

@weinberg SL134(Mine Hole) There is major fouling of the sensors since april 21.  This station fouls easily and needs a volunteer who can check it with some regularity.

[Carol ArmstrongParticipant]

This is the report for 5/3/19.

@bullard SL114 – Last signal transmission was 4/29.  Were sensors removed from the stream?  These sensors were going to be changed, but there has been no transmissions in four days.

[Mike BullardParticipant]

Hi Carol,

All transmissions ceased 4:35 PM on Monday.  This implies a problem inside (or with) the logger case.  Battery looked healthy up til 4:35 PM.  I am going tomorrow AM to see what happened,

Device is “paused by system” at Hologram .  I have to contact  them to “unlock” the sim.

Mike

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