Embed Size (px)
DESCRIPTION
Presented by Mark L. Loethen, P.E.at the Texas Water Conservation Association Conference in The Woodlands, Texas - March 2014
Citation preview
Texas water conservation association
UNDERSTANDING THE PAST
WHILE LOOKING TO THE FUTURE
Mark L. Loethen, P.E.Deputy Director, Public Works & Engineering
March 6, 2014
Houston 2090
WATER SUPPY IN HOUSTON:
2
Today’s Presentation
Water Supply in
Houston A Historical Perspective
Where we are today in 2014
What will the Future Hold
Questions
3
Water Supply in HoustonThe Basics
Houston City Limits: 635+ square milesHouston Population Served: 2.1 million+4th Largest City in the United States
Add in the region for Water SupplyOverall Water Supply Area: ~1,550 square miles• Three Counties
Water Customers Served: ~ 4.3 million
4
A Historical PerspectiveIn the Beginning
◦ 1878 City Council Contracts with Houston Water Works Company
◦ Contract Requirements◦ Provide 55 Fire Hydrants◦ 150,000 Gallon Reservoir◦ 3,000,000 gallons per day◦ 4 miles of distribution mains◦ Free Water to 3 City Fountains◦ Rate Limit of 5 Cents/100 gallons
Water Supply: Buffalo Bayou
5
Then Came Water from the Ground 1887 Artesian Well at 180 feet 15 Wells Drilled
Houston Water Works affirms Artesian supply (no longer Buffalo Bayou)
1906 – City of Houston buys Water Works Company
◦ Water Works Plant◦ 55 Wells◦ 65 Miles of Water Mains
Houston promptly drills 66 new wells
6
Houston Still has Water from the Ground
Main Water Supply System◦ 101 Water Wells◦ Actual Production Capacity (173 MGD)
Isolated Water Supply Systems◦ 28 Water Wells◦ Actual Production Capacity (41 MGD)
7
Looking to the Future:Surface Water Enters the Picture
Water from San Jacinto River
1945 – 2 Federally Funded Canals purchased by City
1954 – Lake Houston Dam Constructed by City
160,000 Acre-Feet of Storage
Houston 2014
8
Additional Surface Water
Water from Trinity River 1969 – Houston and Trinity
River Authority Construct Lake Livingston
83,000 Surface Acres Dam: 2.5 miles long Storage: 1.7Million Acre-
feet
9
Additional Surface Water
More Water from San Jacinto River
1973 – Houston and San Jacinto River Authority Construct Lake Conroe
20,000 Surface Acres Dam: 11,000 feet in
length Storage: >416,00 Acre-
feet
10
Water Treatment
East Water Purification Plant
350 MGD
Water Supplies in Hand:
11
Water Treatment
Southeast Water Purification Plant
200 MGD
Northeast Water Purification
Plant 80 MGD
Houston Water
12
Treated Water Delivery
Houston Water
7 RePump Stations
13
Strategic Partnerships/Customers
Houston Water
Contract Types
Treated Water Contracts
49
GRP Water Contracts (Areas I, II and III)
98
Raw/Untreated Water Contracts
113
Strategic Partnership Contracts (Regional Water Authorities and SE Plant Co-Participants)
14
Reclaimed Water Contracts
2
TOTAL 276
14
Houston Water
Surface Water◦ Lake Houston◦ Lake Livingston◦ Lake Conroe
Groundwater Water Conservation Reclaimed/Reuse Water
Current Strategies - 2014
15
Houston WaterPopulation Estimates
Year City Limits COH Service Area
TWDB 2011
HGSD 2012
TWDB 2011
HGSD 2012
2010 2,099,451
2,099,451
4,068,413
4,333,476
2020 2,361,723
2,248,414
4,642,349
4,924,100
2030 2,621,560
2,428,680
5,212,135
5,275,955
2040 2,879,184
2,606,077
5,776,087
5,571,310
2050 3,138,008
2,783,630
6,331,797
5,850,897
2060 3,397,563
2,965,639
6,883,684
6,125,922
Houston 2060
16
Houston Water
Population Estimates
17
Houston Water
Convert Population Estimates to Demands
18
Houston Water
Current Forecast
19
Houston Water Future Water Supply Projects
Luce Bayou Interbasin Transfer Project 3.6 Miles of Pipeline 23 Miles of Canals Capacity: 425 MGD 404 Permit Issued/Pump
Station in Design
Houston 2020
20
Houston WaterNEWPP Expansion
80 MGD Expanded to 400 MGD
Houston 2025
21
Houston WaterAllens Creek Reservoir
• Storage Capacity: 145,000 acre-feet
• Diversion Limit: 62 MGD (COH)
Houston 2025
22
Direct and Indirect Water Reuse
Further Water Conservation
Desalination ?
Houston WaterLooking to Future
Houston 2080 ?
23
Houston WaterLooking to Future
Importation of Groundwater ?
Interbasin Transfer from East?
Houston 2080 ?
24
Questions ?
Ignore the Past?
Understand and Learn from the Past
