1. ARIZONA WATER COMPANY East Sedona Water Storage Facility
City of Sedona Planning and Zoning Commission
October 16, 2018

2. Introduction

3. Agenda Update from Arizona Water Company Mystic Hills HOA Meeting
Single Tank versus Two Tank Concept
Public Comments
Brackin / CD&E Comments Letter
Vincent McGeary Letters
Planning & Zoning Commission Requests
Reduce building size and height
Revised landscaping plan
Excavation/blasting information
Access Road - Construction Phase
Arizona Water Company

4. Mystic Hills HOA Meeting
October 5, 2018
Discussion:
Conceptual redesign
Line of sight effect
Arizona Water Company

5. Tank Size Justification
Volume Calculation
Maximum Day Demand (MDD): 880,600 gallons
Fire Flow (FF): 3,000 gpm for 3 hours = 540,000 gallons
FF + MDD = 1,420,600 gallons
Tank Size: 1.5 MG
Why not two 750,000 gallon tanks?
Pump requirements would remain the same
Will require construction at two different sites
May need two separate pump stations
Additional piping
Higher maintenance and operation costs
The layout of the facilities above grade will not change much
More cost effective to build one larger tank
Arizona Water Company

6. Public Comments Civil Design & Engineering (CD&E) Review Responses
Vincent McGeary Letter Responses
George Sudal
James F. Murnane II
Arizona Water Company

7. Reduce Building Size & Height

8. Previous Building Layout – 2,350 sq. ft.
Arizona Water Company

9. Design Changes
Building relocated to east to minimize affects to line of sight
Chemical room no longer required
Chemical storage reduced from 500 gal to 55 gal drum
Chemical handling moved to pump room
Same chemical used for swimming pool disinfection
2 buildings separated up by “patio” area
Lattice above and behind open area to screen temporary generator
Overall lower building elevations & smaller building footprint
Arizona Water Company

10. Updated Proposed Building Layout – 1,533 sq. ft.
Arizona Water Company

11. Updated Proposed Building Layout – 1,533 sq. ft.
Brackin, Kevin & Desiree
Pace-Campbell, Nancy Ann
SR 179
Arizona Water Company

12. Residential – 10,000 sq. ft.

13. Updated Proposed Elevations
North
East
Arizona Water Company
South
West

14. Updated Proposed Building Elevation
27’ Potential Residential
22’ Potential Residential
Previous Building
Arizona Water Company
View looking west from SR-179

15. Updated Proposed Building Elevation
27’ Potential Residential
22’ Potential Residential
Previous Building
Arizona Water Company
View looking south from Mallard

16. Potential Residential Building vs Proposed Building
City of Sedona measures height from existing grade (not proposed finished grade)
Example:
12 ft
16 ft
Building Height
Overall Height
Finished Grade
Existing Grade
Arizona Water Company

17. Comparison: Arizona Water Company Proposed Buildings and Residential Building
Old-Proposed
New-Proposed
Residential
Pump Room Building Height
12 ft + 2 ft Parapet
27 ft
Pump Room Overall Height
24 ft ft
Elec Room Building Height
16 ft + 2 ft Parapet
14 ft + 2 ft Parapet
Elec Room Overall Height
20 ft ft
Above Grade Area
2,350 sq. ft.
1,533 sq. ft
15,730 sq. ft.
Below Grade Area
10,028 sq. ft
Setbacks
Front
65 ft
59 ft
25 ft
Side
45 ft (N) 25 ft (S)
59 ft (N) 45 ft (S)
10 ft (N&S)
Rear
78 ft
Arizona Water Company

18. Elevation Comparison View from SW neighbor Wilson Mountain
Current view
Original concept (image by neighbor)
Arizona Water Company
Wilson Mountain

19. Elevation Comparison View from SW neighbor Current view New concept
Arizona Water Company
Wilson Mountain

20. Mature Landscaping

21. Landscaping Plan – Original Concept
Mature vegetation
Minimum 8’ tall trees at installation
Match native plants
Irrigation to accelerate growth
BEFORE
Arizona Water Company
Salvaged (8)
New trees (3)
Salvaged (21)

22. Updated Landscaping Plan
Landscaping contractor surveyed the site & recommends:
Develop plan for salvaging trees
Salvage 76 trees from site
Replant 29 of 76 salvaged trees (Remaining 47 trees are available as backup)
If new trees are needed, trees will be installed at minimum 8’
AFTER
Arizona Water Company
Salvaged (8)
New trees (3)
Salvaged (21)

23. Excavation & Blasting Info

24. Excavation/Blasting Plan
Approximately 135 feet diameter
24 feet deep
Blasting completed in two lifts, 12 to 13 feet each
Each lift divided into four areas
Each area will require two days of drilling (Approximately 85 holes)
60-75 dba
One day for setting the charges
Blast – Approximately 2 seconds
Sound Level – 100 to 120 dba (Less than and as quick as a thunderclap)
Arizona Water Company

25. Excavation/Blasting Plan
Arizona Water Company

26. Blasting Protection Measures
Blast curtains
Sound walls
Vibration monitoring
Pre-construction surveys
Arizona Water Company

27. Blasting and Excavation Sequencing3 4 2 1
Lift 1
Lift 2
Arizona Water Company

28. Access Road

29. Temporary Access Road – Construction Phase
Conceptual access roadway design developed
Permit application submitted to ADOT
ADOT Feedback – “A cursory look at the submitted documents indicate an acceptable design. A detailed review will be provided shortly”
Arizona Water Company

30. Summary

31. Summary Reduced building size by more than 800 square feet
Improved line of sight by moving building towards east side of lot and increasing side and rear setbacks
Landscape architect surveyed site, maximizing use of salvaged trees with contingency plan
Details provided regarding blasting plan
Access road permit review in progress
Positive feedback
Arizona Water Company

32. QUESTIONS?