Orange County NC Website
Browse       Search
I <br />1 B. Secondary Goal: <br />2 Monitor variations in groundwater levels across the nine main bedrock lithologies. <br />3 Terrane effect (bedrock) observation wells should be completed in each of the nine main <br />4 bedrock lithologies. <br />5 <br />6 <br />Latest Activities <br />7 <br />m <br />Added bedrock wells: <br />8 <br />0 <br />Former 911 Center <br />9 <br />0 <br />Duke Forest 4D <br />10 <br />Installed wells at: <br />11 <br />Northeast District Park Site <br />12 <br />Blackwood Farm <br />13 <br />Working on agreement with TLC for use of additional bedrock well. <br />14 <br />15 <br />DWR Web Site <br />16 <br />➢ <br />All data is available on NCDENR Division of Water Resources web site: <br />17 <br />http://www.ncwater.org/Data and Modeling /Ground Water Databases /leveltable.php ti <br />18 <br />=1 &net = orange &inactive= <br />19 <br />➢ <br />Bedrock Well Data Example <br />20 <br />➢ <br />Statistics Example <br />21 <br />22 <br />What's Next? <br />23 <br />➢ <br />Continue to collect data and update web site. <br />24 <br />➢ <br />Consider installing automated rain gage(s) to collect precipitation data. <br />25 <br />➢ <br />Replace transducers as needed. <br />26 <br />27 Tom Davis said groundwater level data is collected every hour from each of the 11 <br />28 wells. He said he periodically downloads this data and makes it available to the public on the <br />29 DWR website. <br />30 He reviewed a graph showing groundwater levels from 2010 to 2014. <br />31 Chair Jacobs asked what this shows. <br />32 Tom Davis said 2010 and 2011 were wetter years, but there is no way to know whether <br />33 this is the norm or the drier years are the norm. He said this will be determined with more data <br />34 over time. <br />35 He reviewed the groundwater level graphs showing the re- charge months of winter and <br />36 early spring and the lower level months of summer. He noted that the 2014 lines of the graph <br />37 were higher than the mean. He said the groundwater level is the same term as the <br />38 groundwater table. <br />39 Commissioner Gordon asked what this data means in absolute terms of adequate <br />40 quantity. <br />41 Tom Davis said this cannot be looked at in absolute terms, only relative to previous <br />42 levels. <br />43 Commissioner Gordon said she is trying to figure out the big picture and what this <br />44 information means as a practical matter. <br />45 Dave Stancil said part of the big picture is that more time is needed to do a full analysis. <br />46 He said a system has been set up and in 5 or 10 years there will be a lot more analysis to draw <br />47 from. <br />48 Commissioner Gordon referred to page 3 of the report, and asked for clarification about <br />49 the casing depth numbers. <br />50 Commissioner McKee said the top of the casing is above sea level. <br />