CW DMAG Update - July 30, 2007 Low Inflow Protocol (LIP) Drought Indicators
The C-W Basin is in a Stage 1 Low Inflow Condition. The Stage has worsened from a Stage 0 Watch Stage last month.
The following are the Low Inflow Protocol (LIP) drought indicators as of July 30, 2007:
Storage Index (SI): 64.36%
Target Storage Index = 75.00%
Ratio = 85.81% (Supports Stage 1)
Note: Last Month = 94.53% (Stage 0)
Streamflow Indicator (six-month average versus historical six-month average):
Ratio = 66.6% (Supports Stage 1)
Note: Last Month = 81.5% (Stage 0)
US Drought Monitor (three-month average):
Three-month Numeric Average = +1.67 (Supports Stage 1)
Note: Last Month = +1.67 (Stage 1)
USGS Langtree current reading = 20.07 ft (Stage 0)
Note: 18.21 is the Stage 0-Watch Level
USGS Linville current reading = 2.21 ft (Stage 2)
Note: 2.04 is the Stage 0-Watch Level
NCDWR Glen Alpine reading = 8.56 (Stage 1)
Note: 7.69 is the Stage 0-Watch Level
The C-W Basin was in a Stage 0, Low Inflow Watch at the end of June, 2007, and all indicators have moved to a Stage 1. The Storage Index (SI) reading is reflective of the fact that continuing low inflows are reducing the Storage Index well below the Target Storage Index. Of significance also is the 6-month streamflow indicator compared to last months reading.
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. As you are aware, Stage 1 is a voluntary water use restriction stage and Owners of Public Water Supply intakes should take steps to implement voluntary water use restrictions in accordance to the LIP.