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CW DMAG Update - April 30, 2007 Low Inflow Protocol (LIP) Drought Indicators

The C-W Basin is in a Stage 0 Watch Stage. This is the same stage as last month.

The following are the Low Inflow Protocol (LIP) drought indicators as of April 30, 2007:

Storage Indicator (SI): 75.30%
Target Storage Index = 74.70%
Ratio = 100.80% (Supports Normal)

Streamflow Indicator (six-month average versus historical six-month average):
Ratio = 99.7% (Supports Normal)

US Drought Monitor (three-month average)
Three-month Numeric Average = +0.33 (Supports Stage 0)

Groundwater Gages:
USGS Langtree current reading = 17.36 ft (Normal) 18.21 is the Stage 0-Watch Level
USGS Linville current reading = 2.07 ft (Stage 0) 2.04 is the Stage 0-Watch Level
NCDWR Glen Alpine reading = Not updated since March 16, 2007

The C-W Basin was in a Stage 0, Low Inflow Watch at the end of March, 2007, and all indicators have to recover to move back up to a lower Stage. The trend for the indicators is in the direction of increasing dryness with the Drought Monitor indicator now in a Stage 0. In order to move out of an LIP Stage to a lower Stage or Watch or Normal Stage, all groundwater gages need to recover to the lower stage also. The Langtree gage reading has recovered from a Stage 0 to a normal reading for four months, but the Linville gage reading has returned slightly to a Stage 0 reading. The Glen Alpine gage has not been updated since March 16, 2007 and the last reading is not recorded above.

As discussed previously, since we are operating under the existing license, the LIP is voluntary at this time. However, Duke recommends that all adhere as best as possible to the provisions of the LIP. Please refer to Appendix C of the Comprehensive Relicensing Agreement for the official LIP requirements.