1 Citizens Reservoir Quarry Conversion Ryan Taylor, PE Manager - PowerPoint PPT Presentation

1

Citizens Reservoir – Quarry Conversion Ryan Taylor, PE – Manager Citizens Energy Group February 12, 2019 2

Overview • Project Purpose • Site Mining History • Site Description • Project Approach • Intake Structure • Pumping Structure • Outlet Structure 3

Project Purpose • Customers – 325,000 retail – 8 wholesale • 10 treatment plants ‐ 257 MGD • Average demand ‐ 125 MGD • Max demand ‐ 232 MGD (2012) • 3 main supply reservoirs • 4,400~ miles of main 4

Citizens Project Purpose Reservoir • Raw Water Supply & Geist Canal Reservoir Treatment Fall Creek • Excess Raw Water Treatment Plant Capacity in Fall Creek White River Treatment Plant • Additional Treatment 5 & Aqueduct Intake Capacity at White River Treatment Plant

6 School House One Room 1941

1956 30 AC 7

1962 55 AC 8

1972 190 AC 9

1987 360 AC 10

2000 190 AC 220 AC 11

2018 12

13

Site Description • 90 Acre Site • 8 Acre Site at Elev 790 • 230 Feet Deep • +3 Bgal Capacity • Geist Reservoir 6.7 Bgal • Residential Development 14

Design Approach • Feasibility Study • Stakeholder Coordination • Basis of Design • Water Quality Analysis • 30% Design • Frequency of Drawdown 17

Corresponding Water Probability of Quarry Quarry Surface Elevation in Quarry Drawdown Drawdown (ft) (ft) 200 25 year occurrence (4%) 585 145 20 year occurrence (5%) 640 125 15 year occurrence (6.67%) 660 85 10 year occurrence (10%) 700 44 5 year occurrence (20%) 741 30 4 year occurrence (25%) 755 19 3 year occurrence (33%) 766 2 2 year occurrence (50%) 783 18

19

Citizens Reservoir ‐ Intake 20

21

22

Pumping Structure 23

• 24

25

• 26

27

Outlet Structure • 28

• 29

Questions • Ryan Taylor, PE – Manager Citizens Energy Group rtaylor@citizensenergygroup.com 30