2011 drought challenges and plans for city of houston
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2011 DROUGHTCHALLENGES AND PLANS FOR
CITY OF HOUSTONCITY OF HOUSTON
Mark L. Loethen, P.E.Deputy Director, Public Works & EngineeringEngineering
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Today’s PresentationyWater Supply – Houston StyleWater Supply Houston Style
Summer 2011
Upstream Issues
Downstream Issues
Future Projects
QQuestions
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WATER SUPPLY – HOUSTON STYLE
Houston Service Area 635+ square milesHouston Service Area 635+ square milesPopulation Served 2.1 million+4th Largest City in the United States
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Houston Water
Ground Water WellsWaterMain Water Supply Systempp y y◦ 103 Water Wells◦ Actual Production Capacity (175 MGD)
Isolated Water Supply Systems◦ 28 Water Wells28 Water Wells◦ Actual Production Capacity (44 MGD)
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Surface WaterHouston WaterWater
Lake Livingston (1971)
Lake Conroe (1973)
Lake Houston (1953)
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Water TreatmentHouston WaterWater
East Water Purification Plant 350 MGD
Southeast Water Purification Plant 120 MGD
Northeast Water Purification Plant 80 MGD
200 MGD
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Treated Water Delivery
Houston Water DeliveryWater
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Strategic Partnerships/Customers
Houston Water Partnerships/CustomersWater
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SUMMER 2011- UPSTREAM
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Supply: Groundwater
154 MGDMGD
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Storage Supply: Lake Livingston
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Storage Supply: Lake Conroe
COH Requests 150MGD Release
COH Requests Reduction to
60 MGDCOH Requests Reduction to 0
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Storage Supply: Lake Houston
Minimum 36.25
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SUMMER 2011- DOWNSTREAMWN
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Photos from Seattle & Florida
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700
Daily Production by Facility (MGD)Stacked Data
500
600
400
300Average Monthly Production (MGD)
EWPP NEWPP SEWPP GW-M GW-I
100
200Total
May 281 65 99 47 15 507June 301 67 110 85 18 581July 294 65 111 93 17 581Aug 292 67 112 137 19 628Sept 306 65 117 119 18 624
0
100
May
May
May un un Ju
l
Jul
Aug
Aug
Sep
Sep
Oct
Oct
Oct
Nov
Nov Dec
Dec Jan
Jan
Feb
Feb
pOct 288 68 102 37 14 509Nov 249 67 101 28 11 457Dec 230 61 95 18 9 412Jan 204 59 70 45 8 387Feb (MTD) 226 36 67 55 8 380
1-M
15-M
29-M
12-J
26-J
10-J
24-J
7-A
21-A 4-
S
18-S 2-
O
16-O
30-O
13-N
27-N
11-D
25-D 8-
J
22-J
5-F
19-F
EWPP NEWPP SEWPP GW Main GW Isolated Plants
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Water ConservationStage 1 – Voluntary Conservation
• Initiated in June 2011
Stage 2 Mandatory RestrictionsStage 2 – Mandatory Restrictions• Initiated in August 2011
Combined reservoir storage is ~24 months supply for 10 consecutive daysAverage water production is 80% of pumpagecapacity for 3 consecutive daysAverage water system pressure is less than 45 psipsi
• Repair detectable leaks within 72 hours of discovery• Limit outdoor irrigation to 2 days per week • Rescinded in January 2012
Stage 3 – Not reachedCombined reservoir storage is ~18 months supply
Stage 4 – Not reached
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Stage 4 Not reachedCombined reservoir storage is ~12 months supply
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Repairs: Prior to 2011 System Fact: Houston has 6,785 miles of waterlines
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Repairs: 2011
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FUTURE WATER PROJECTSW
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Future Water Supply Projects
Luce Bayou InterbasinTransferProjectProject
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Future Water Supply Projects
AllensCreekReservoir
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Future Water Supply
Direct and Indirect Water Reuse
Desalination ?
Further Water Conservation
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QUESTIONS ?
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