Hawaiʻi DWS Design Standards JOINT STATE CITY COUNTIES SYMPOSIUM LAULIMA WORKING TOGETHER TO BUILD A BETTER HAWAIʻI Reservoirs Seismic design changes for Big Island Standard Reinforced Concrete 03 MG and 01 MG ID: 815155
Download The PPT/PDF document "COUNTY OF HAWAIʻI Department of Water ..." is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
COUNTY OF
HAWAIʻIDepartment of Water Supply
Hawaiʻi DWS Design Standards
JOINT STATE - CITY - COUNTIES SYMPOSIUM
“LAULIMA” WORKING TOGETHER TO BUILD A BETTER
HAWAIʻI
Slide2Reservoirs
Seismic design changes for Big IslandStandard Reinforced Concrete (0.3 MG and 0.1 MG)Wire-wrapped, Pre-Stressed Concrete (AWWA D110, Type 1) (0.5 MG and larger)OSHA Compliance/Employee Safety
Interior Coating/RoofPump Controls/Building
Soft Starter vs. Variable Frequency Drive (VFD)Protective and Power Efficiency EquipmentArc Flash/Arc Blast design
Source Development Strategies
Soft Starter vs. Variable Frequency Drive (VFD)Redundancy and robustness
DWS Design Standards
Slide3Standard Reinforced Concrete Reservoir - Prior to 2000
(sliding wall to footing and wall to roof construction joints)
Slide42001 DWS Design of first
2.0 MG Reservoir
Slide5Slide60.3 MG Standard reinforced concrete design reservoir
Seismic cables connecting the footing and the wall. Walls are also poured in full height sections with vertical joints which differs from previous designs (horizontal joint).
Slide7Standard Reinforce Concrete Reservoir Prior to Seismic Cable Restraints
Sliding Base Joint
Slide8Horizontal Wall Joint vs. Vertical Wall Joints
Horizontal Wall Joint
Full Height Wall Panels
Slide9OSHA Compliance and Employee Safety
Slide10Finished AWWA D110, Type 1 Reservoir
Slide11Reservoir Interior
Slide12Interior concrete no longer coated. Instead all piping coated with CIM product. Excessive corrosion occurring on pipes even with epoxy coating.
Roof no longer being painted. Easier maintenance including pressure washing without worrying about roof coating.Roof vent to include insect screen that is visible without removing cover.Level indicator cable and floats (controls) need to be accessible from interior ladder.
Pressure transmitter should be tapped off wash-out line, not influent or effluent line.Valves just outside reservoir footing on all lines required.Flow meters on influent and effluent lines.
Special Inspections are required at numerous stages.Other Reservoir Design Issues to Consider
Slide13Custom Thrust Block Designs
Slide14Protection and Power
EfficiencyProtection – Grounding Grids (Multi-point ground) in lieu of grounding rods
Additional Check Valves on deep set pumps
Variable Frequency Drives (VFD) include most of the protection requirements needed for the motor as well as improve on electrical cost savingsOther Power Efficiency Measures
Slide15Solid State Soft Starter
VFD Drive
Slide16Control Buildings
Slide17Deepwell Installation
Purge line on well discharge piping requires air-gap and duck-bill type check valve.
Slide18Plans – include
pdf with approved drawingsSHPD – Archaeological Monitoring Plans and Monitoring RequirementsT&C consultation including Aha Moku
(especially for source development)Other Planning/Design
Issues to be Considered
Slide19Water System Standards including addenda are available on-line at Hawaiidws.org.
Can always pick up the phone and call our Engineering Branch at (808) 961-8070 extension 2.
Questions on Design Requirements?
Slide20FUTURE DWS CIP
Slide21Slide22Questions?
Mahalo!