Saturday, November 10, 2012

Project Baseline: Tahoe - Sand Harbor - Evaluation by Gerald De Vore

Project Baseline Stats:
Depth: 20 feet
Temp: 54f
Visibility: 40 - 50 feet
Photo:
 
 
 
Photos by Jerry De Vore     
 
 
Of Note:  By 10 November, the Tahoe Sucker fish school that has been at a depth of 54 feet near the tree on the inner wall of Divers Cove have left. This school had been hanging out in the same area since July of this year - 11 November, 2012: Jerry DeVore.


Sunday, October 14, 2012

Project Baseline Tahoe Community Report

Observation Date:14 October, 2012
Dive Team Members:xx
Begin Time:xxEnd Time:xx        Bottom Time: xx

Weather Conditions:clear
    WindDirection : N/A   Speed: N/A  Duration: N/A

Water Conditions 
    Surfaceflat
    Last 24 hrs:Calm
    Temperature:Surface- 68
At Depth- Site Gauge- xx    Diver Gauge- xx
    Visibility:Vertical-xx      Horizontal- 50 +
    Current:Direction-N/A  Speed- N/A
    Site Depth Benchmark reading (Per the site gauge): 22 ffw
    Dive Team Gauge:  #1- 19 ffw     #2- 21ffw

Animal & Plant Life 
    Fin FishVery populas Shiners, Suckers, Dace and Trout
       CopepodEst. Density: Low
    Invasive SpeciesN/A
       Mysis ShrimpEst. Density: Low

Team Observations/Comments: Today the Project Baseline Staff, tabled at Sand Harbor and discussed with over 50 divers the efforts going on in Tahoe.  It was extremely productive and we had several divers report that our depth benchmark was still at 22', their gauges varied by plus or minus 2 feet, temp was 68 on our depth benchmark and that the visibility was at or better than 50 feet during the first dive.  This was an abnormally warm, calm October day surrounded by some rain storms earlier in the week but for the most part, very calm atmosphere from Thursday thru this day which was Sunday.  

Saturday, October 13, 2012

Project Baseline, Hurricane Bay, Tahoe October 13, 2012

Observation Date:13 October, 2012
Dive Team Members:Mike Soldswich, Marc Briseno,  Martin McClellan
Begin Time: 10:45amEnd Time:11:55am        Bottom Time: 50min

Weather Conditions:Clear Calm 58f
    WindDirection : n/a Speed: n/a Duration: n/a

Water Conditions 
    SurfaceFlat Calm with some small surface ripples - Boat Wake present
    Last 24 hrs:Calm with no wind
    Temperature:Surface- 66f
At Depth- 62 Site Gauge- 62    Diver Gauge- 62
    Visibility:Vertical- 30 minus      Horizontal- 20 - 30ft
    Current:Direction-N?A Speed-N/A
    Site Depth Benchmark reading (Per the site gauge): 62 ffw
    Dive Team Gauge:  #1- 59 ffw     #2- 60ffw

Animal & Plant Life 
    Fin FishDescription : Lahotan Shiners Quantity: large schools 100+
       CopepodEst. Density: Low 
    Invasive SpeciesNone Present
       Mysis ShrimpEst. Density: Low

Team Observations/Comments: Today, NMDE divers established the PBTahoe site in Hurricane Bay at the site of the Alley Cat, a 30+ foot sail boat that sank some 10 years ago.  We also cleaned off a 1 meter square area of the Alley Cat's hull from algae and debris and took some photos of the Hurricane Bay site under water.  Following the set-up of the site depth/temperature/visibility metering devices, we scootered south along the 40 - 60 foot contour and noticed a very active crayfish community, many shiners but did not see any trout, suckers, or other fin fish.  We failed to notice copepod or mysis shrimp but that said, there was probably a very small population however I personally saw the biggest Paiute Sculpin I have ever seen.  Crusing the contours at between 40 and 60 feet provided no improvement in the 20 - 30 foot visibility.

PB Tahoe stats:
Depth: 62 feet
Temp: 62f
Visibility: 20-30 feet
Photo:




Sunday, August 12, 2012

Project Baseline - Tahoe: Dive #2

Observation Date:11 August, 2012
Dive Team Members:Marc Briseno, Todd Kincaid, Laura James, Vanessa Belz, Martin McClellan
Begin Time: 1:00End Time: 1:30        Bottom Time: 25min

Weather Conditions:Clear, Calm, Sunny
    WindDirection : N/M Speed: N/M Duration: N/M

Water Conditions 
    SurfaceFlat w/tremendous boat chop
    Last 24 hrs:Calm, Afternoon Thunderstorms, temp mid 80's
    Temperature:Surface- 66f
At Depth-
       Site Gauge- 66f   
       Diver Gauge- 68f
    Visibility:Vertical- '32 (could see boat from below     Horizontal- 30'-40'
    Current:Direction- Southerly longshore Speed- 25'-30' per minute
    Site Depth Benchmark reading (Per the site gauge): 22 ffw
    Dive Team Gauge:  #1- 21 ffw     #2- 22ffw

Animal & Plant Life 
    Fin FishDescription :
Lahontan Mountain Sucker (
Catostomus platyrhynchus lahontan) Piute Sculpin (Cottus beldingi)Golden Shiner (Notemigonus crysoleucas)

  Quantity: Several of each and several schools of the Shiners

       CopepodEst. Density: Low     Invasive SpeciesNone Present        Mysis ShrimpEst. Density: N/M
Team Observations/Comments: This was an exciting day as it was NMDE's second official Project Baseline Tahoe dive and joining the NMDE team were Todd Kincaid, VP GUE and Vanessa Belz, Project Baseline Director GUE and Laura James, Seattle based videographer and GUE diver.  The objective was to set up the SS Tahoe and the Sand Harbor Site.  This was the second dive of the mission and at the bottom, we secured a permanent altitude adjustable depth gauge (Tekna Zero Adjust) which we zeroed at the surface and a thermometer gauge.  These gauges are mounted in an aluminum box and secured to our depth benchmark preventing the gauges from moving.  We then established visibility markers at 30-40-50-60 feet from the depth benchmark location.  Unlike the visibility in Glenbrook at our SS Tahoe site, the visibility here was much better at between 30&40'. Again, these markers were placed with the use of a physical tape measure.  Again, this dive had two teams, Marc Briseno and Martin McClellan doing the work of establishing the PB station and Todd Kincaid (video support) and Laura James (videographer).  Project Baseline Director, Vanessa Belz was our surface support and boat tender during this operation. Dive was short in duration due to the schedule for the day, 25min at 28' with water temps at 66f as this time of year in the shallow depths of the lake with sandy bottoms (Sand Harbor is typical of this type of bottom composition) the thermocline is not dominantly present until 50-55' and even during a later dive to 65' the bottom temperature did not drop below 58f..

Project Baseline-Tahoe: First Official Dive

Observation Date:11 August, 2012
Dive Team Members:Marc Briseno, Todd Kincaid, Laura James, Vanessa Belz, Martin McClellan
Begin Time: 10:00aEnd Time: 11:30a     Bottom Time:  22min

Weather Conditions:Clear, Calm, Sunny
    Wind  Direction : N/M Speed: N/M  Duration: N/M

Water Conditions 
    SurfaceFlat w/tremendous boat chop
    Last 24 hrs:Calm, Afternoon Thunderstorms, temp mid 80's
    Temperature:Surface- 66f  At Depth- 54f [75'] [Mild thermocline at 22' (60f) and major thermocline at 50' (58f)]
    Visibility:Vertical- 30'-35' Horizontal- 20'-25' on bottom a bit better mid H20 to surface
    Current:Direction- Southerly longshore SE Speed- 30 feet per minute
    Site Depth Benchmark reading: 80ffw by Tekna Depth [Bench Mark Depth Gauge] - 77' Uwatec

Animal & Plant Life 
    Fin FishDescription : N/M Quantity: 0
       CopepodEst. Density: Low up to first major thermocline at 50' then high throughout
    Invasive SpeciesSaw none
       Mysis ShrimpEst. Density: N/M

Team Observations/Comments: This was an exciting day as it was NMDE's first official Project Baseline Tahoe dive and joining the NMDE team were Todd Kincaid, VP GUE and Vanessa Belz, Project Baseline Director GUE and Laura James, Seattle based videographer and GUE diver.  The objective was to set up the SS Tahoe and the Sand Harbor Site.  This was the first dive of the day and it took place at our SS Tahoe starting point in what is now approximately 78' at the sand.  This is the location for all of NMDE's runs out to the Steamer Tahoe.  At the bottom, we secured a permanent altitude adjustable depth gauge (Tekna Zero Adjust) which we zeroed at the surface and a thermometer gauge.  These gauges are mounted to an aluminum board and secured to our depth benchmark preventing the gauges from moving.  We then established visibility markers at 30-40-50 feet from the depth benchmark location however we were very dissapointed as the visibility was well below 30' and we will have to go back and place a 20 foot visibility marker.  These markers were placed with the use of a physical tape measure.  Upon arrival at our station, we noticed significant algae build up on our line approaching the surface. It was measured to be 1.5" thick at the zone from 30 feet to the surface.  The line was cleaned along with the benchmark buoy and a photo was taken as a baseline photo of the white buoy suspended.  This dive had two teams, Marc Briseno and Martin McClellan doing the work of establishing the PB station and Todd Kincaid (video support) and Laura James (videographer).  Project Baseline Director, Vanessa Belz was our surface support and boat tender during this operation. Dive was short in duration due to the schedule for the day, 22min at 77' with water temps at 54f.

Tuesday, July 10, 2012

Establish Depth Benchmark Area -


Observation Date:12 March, 2012
Dive Team Members:Mike Soldwisch - Martin McClellan
Begin Time:10:00amEnd Time:11:45am

Weather Conditions:Clear with a slight breeze
    WindDirection : Swirling in Hurricane Bay but blowing N-NE
Speed: 5-10 MPH
Duration: Continued throughout the dive and increased in intensity throughout

Water Conditions 
    SurfaceRipple waves but no whitecaps
    Last 24 hrs:Calm in mornings and breezy in afternoons
    Temperature:Surface- 46f At Depth- 42f
    Visibility:Vertical- 35+ft could see boat anchors from surface Horizontal- 40-45ft
    Current:Direction- None Speed- N/A
    Site Depth Benchmark reading: No benchmark yet set

Animal & Plant Life 
    Fin FishDescription : 0 Quantity: 0
       CopepodEst. Density: Low
    Invasive SpeciesNone
       Mysis ShrimpEst. Density: None

Team Observations/Comments:  Today's dive by NMDE was to scout out a good location to place the Project Baseline depth benchmark and visibility station.  Traveling about 4500 feet along the shoreline in a north by north east direction, we scootered the 40 -70 foot depth column observing as we moved along.  There were several areas of heavy branch and leaves slowly deteriorating in the water just below areas of heavy aspen groves, creating an interesting shade/tint to the water of yellowish brown.  What was most dominantly noticed is directly in the shallows off the parking on HWY 89 was thick algae growth attached to the rocks in the 5-10 foot range and when viewed from approximately 30 feet this algae had an incredible fluorescent green tinge to it.  Something the team had never observed in 20 years of diving this site.