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Rain Catchment and Adaptive Building Reuse:The Historic Seaholm Power Plant

Kent S. Butler, Ph.D.1

Adam C. Roy2

John Rosato3

1 Univ. of Texas at Austin2 Seaholm Power Ltd3 Seaholm Power Ltd

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Seaholm Power Plant

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DOWNTOWN AUSTIN, 2006

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4/33THE FIRST AUSTIN POWER PLANT, 1893

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5/33Seaholm Power Plant at Full-scale Production, late 1950s

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6/33POWER PLANT SITE REMEDIATED, 2006

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ORIGINAL SITE PLAN DRAWING, LATE 1940s

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SEAHOLM DISTRICT

MASTER PLAN, 2000

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TBG: Perspective

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TURBINE HALL SCHEME -- SECTION

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West Side Entry

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Town Lake

Turbine Building

Office Building(NEW)

Highrise Hotel/Condominium

(NEW)

Water Intake& Pumphouse

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HotelHotel

OfficesOffices

ParkingParking

Turbine BuildingTurbine Building

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FEASIBILITY STUDY: PAYBACK PERIODS

Years to Achieve Return on Investment

Water Price Inflation

(%)

Scenario 2 3 4 5

A 29 23 20 19

B 27 21 20 18

C 34 29 26 22

D 46 36 30 27

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CONDENSER COOLING SYSTEM PLAN

Shoal Creek

To

wnLake

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CONDENSER DISCHARGE PIPES

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STORMWATER DISCHARGE PIPES

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COOLING WEIRS, PLAN VIEW

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EAST COOLING WEIR

Plan

Section

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Young men posing (for scale) in East Cooling Weir

C

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Cooling Weir Dimensions:- East Weir

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Cooling Weir Discharge Pipes

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COOLING WEIR DISCHARGE PIPE, 60 DIA.

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Turbine Infrastructure Storage Capacities

West cooling weir (16L x 15W x 28H) 55,000 gal.East cooling weir (same as west weir) 47,000 gal.West weir discharge pipe (60 dia.) 28,600 gal.East weir discharge pipe (60 dia.) 14,100 gal.Weir connector pipe (60 dia.) 12,600 gal.Condenser discharge pipe (54 dia.) . 15,600 gal.

TOTAL STORAGE CAPACITY: 172,900 gal.

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ROOF ELEMENTS OF TURBINE BUILDING

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CATCHMENT AREA CALCULATIONS

Turbine Hall 45,000 sq. ft. Office/parking (2 floors 28,000 sq. ft. Hotel/Condo

.

26,000 sq. ft.Total roof area 99,000 sq. ft.

Plaza Hardscape . 45,000 sq. ft. Total Catchment Area 144,000 sq. ft.

Plantings, streets, parking . 65,000 sq. ft.

Total Developed Area 209,000 sq. ft.

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(assuming 160,000 gals. min. storage capacity)

Total Annual Irrigation Demand: 1,322,000 gal.

Turbine Roof rainfall collected (75% efficy): 694,000 gal.Office roof rainfall collected (75% efficy): 432,000 gal.Municipal water supplementation: 196,000 gal.

Percentage of demand met by RWH: 69%

Annual Rainwater Yield AnalysisTurbine building & Office building

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STORM OVERFLOW AND WATER QUALITY BMP

Prince GeorgesCounty, MD, n.d.

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BIORETENTION SWALE FOR WATER QUALITY BMP

y, ,

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-- (assuming capture 1.2 inches of first-flushrunoff for 75% impervious cover development)

Hotel/Condo 26,000 sq. ft.Plaza Hardscape 45,000 sq. ft.

Total Catchment Area 71,000 sq. ft.

Total storm water detention volume: 7,100 cu. ft.or 53,000 gal.

Runoff collected (70% efficiency): 37,000 gal.

Storm Runoff Analysis forStorm Runoff Analysis for

Turbine and Office BuildingsTurbine and Office Buildings

andand HardscapeHardscape SurfacesSurfaces

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TBG: Perspective

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