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DocuSign Envelope ID: EBE28081 -B782-4B42-BADB-D8C93B687B1 B <br />December 22, 2020 <br />Angela Aalbers <br />Page 7 of 12 <br />Reference <br />1000 <br />900 <br />800 <br />700 <br />600 <br />E <br />a <br />500 <br />3 <br />0 <br />LL <br />400 <br />300 <br />200 <br />100 <br />0 <br />01/01/14 01/01/15 01/01/16 01/01/17 01/01/18 C <br />East Taylor Seep Investigation <br />Figure 4 Ouffall 010 Flow Rate <br />Outfall 010 Measured Discharge <br />01/02/20 <br />Flow from the East Taylor Seep was diverted into a weir on October 19, 2020 to monitor the seep flow rates. <br />The flow level in the weir is recorded on a data logger every 15 minutes, and the flow depth is converted to <br />flow rate using standard weir equations. The average daily flow rates are calculated from the 15-minute data <br />to provide overall trends. The flow decreased from 160 gallons per minute (gpm) to approximately 120 gpm in <br />the two months of monitoring. While this trend does not follow previous discharge trends from the outfall <br />(increasing in the fall), this decrease in flow is expected considering the area has been experiencing on -going <br />exceptional drought conditions with limited water being added to the system (NDMC 2020). This suggests that <br />the seep flows follow sitewide hydrologic trends, and that infiltration is a source of the seep flow. The average <br />daily flow rates are presented in Figure 5, below. <br />Design with community in mind <br />pk c:\users\pkos\documents\_projects\colowyo\easttaylorseepwaterbalance_22dec2020_final.docx <br />