city council august 21, 2012 water
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TRANSCRIPT
City Council Meeting August 21, 2012
Kickapoo Creek Crossing
Twin Buttes South Pool Pumping
Flow Information
• S Pool Pumping Rate 77 A-F/Day
• Flow into North Pool 55-60 A-F/Day
• Flow into Nasworthy 15-25 A-F/Day
South Pool Summary
• Releases (pumped) - 1,078 A-F• Evaporation -192 A-F
Net Change -1,270 A-F
Elevation Change 3’ Down
North Pool Summary
• Inflow + 812 A-F• Releases -308 A-F• Evaporation -142 A-F
Net Change +362 A-F
Elevation change 6” Increase
Lake Nasworthy Summary
• Inflow +308 A-F• Releases -376 A-F• Evaporation -178 A-F
Net Change -246 A-F
Elevation change 5” Down
Lake Levels
• Changes in Reservoir Contents since August 3
South Pool -1,270 A-F 3’ Drop North Pool +362 A-F 6” Rise Lake Nasworthy -246 A-F 5” Drop
ADDITIONAL WATER SUPPLY
Hickory Well Field Expansion
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
0
5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
6 mgd usage
Well Field Banking and Allocation Chart Based on 6 mgd Usage
Banked Water
Allocated Usage
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
0
5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
9 mgd usage2014 - 2018
Well Field Banking and Allocation Chart Based on 9 mgd Usage
Banked Water
Allocated Usage
Hickory Well Field Layout
Cost Estimate to Expand to 9 mgd Capacity• Well Field:
$10,720,000• 5 New Wells Drilled, Equipped• Well Field Collector Pipes & Roads
• Booster Pump Station: $ 260,000• 1 Additional Pump and Electrical
• Contingencies: $ 2,920,000
• Engineering and Construction Mgmt. $ 2,160 000
• Total $16,060,000
Draft Schedule• Environmental Assessment 3 months
• State and Federal Agency Review 3-4 months
• Prepare Plans and Specs/Bid Project 5 months
• TCEQ & TWDB Review 2 months
• Construction 8-12 months
Water Advisory Recommendation
• Expand the well field with the installation of 7 wells, pumps, collector pipes, roads, electrical
• Expand booster pump station by 3 mgd (1 pump)
• Utilize uncommitted construction funds estimated to be $15 million
• 5 wells-$16 million; 7 wells-$19 million
Drought Level III Projection
Projected Water Supply
Aug Sept Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sept Oct0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
16,000
18,000
20,000
IvieSupply
Depleted
DroughtLevel III
Month
Pro
ject
ed S
up
ply
, Acr
e-F
eet
Stage III Water Use Restrictions
• No watering of lawns, shrubs, gardens, golf courses
• City Council may designate days and times for hand watering of trees and foundations
• No filling or refilling of swimming pools or fountains
• No washing of vehicles except as needed for public health, safety and welfare
Water Usage Surcharges
• Residential accounts- $6.00/1,000 gallons for usage over 10,000 gallons
• Apartments- $5.00/1,000 gallons for usage over 3,000 gallons/apartment unit
• All other accounts- $2.50/1,000 gallons
Water Distribution System
Distribution System Operation
• System Flushing- Rusty Water & Water Quality
• Water Quality- Maintain Chlorine Residual
• Increased Flushing Due to Hot Weather & Lower Usage
Water Disinfection
• Current Disinfection Method Chloramine- Chlorine combined with Ammonia is
added to treated water
• Other Approved Disinfection MethodFree Chlorine- Chlorine gas is added to treated water
System Operational Change
• Switch Disinfectant to Free Chlorine
• Monitor Dispersion of Free Chlorine thru System
• Continue Free Chlorination thru October
Public Notices
• Press Releases, City Web Site
• Written notice to specific customers -Hospitals-Dialysis Units-Pet Stores for aquariums
Water Aesthetics
• Changes that may be observed -Chlorine smell-Fishy smell-Cloudy/Colored appearance
• Symptoms do not affect safety of the water
Schedule
• Begin Free Chlorination August 21
• Complete Chlorination October 31
City Council Meeting August 21, 2012