Launiupoko Water Company

Launiupoko Water Company, LLC (LWC) was established in 2002 by three neighboring land entities, Launiupoko Associates, LLC, Kauaula Land Company, LLC and Makila Land Co., LLC. Together, these land companies contributed capital and infrastructure to create the potable water system servicing the Launiupoko region just south of Lahaina, Hawaii. In June of 2003, the LWC received a Certificate of Public Convenience and Necessity from the State of Hawaii Public Utilities Commission to provide water service.

About the System

The drinking water for the Mahanalua Nui Subdivision Phase I and II , Makila Plantation Subdivision Phase I and II, Pu’unoa Subdivision Phases I and II is supplied by the existing Well 1 (State Well No. 5138-01), with Well No. 2 (State Well No. 5137-01), acting as a backup to Well No. 1. Well no. 3 was added to the system. The public water system (PWS) number assigned by DOH for this system is 251. The daily system monitoring and monthly billings are preformed by West Maui Land Company staff.

Presently, Well No. 1 or 3 pumps water into an existing 400,000-gallon tank (Tank No. 1), which is located at the same site as Well No. 1, at an elevation of 630 feet msl. This well and tank site is located within the Mahanalua Nui subdivision. The distribution of the water from tank No. 1 services lots located below elevation 510 feet msl. A booster pump located at the Well No. 1 site, pumps the water from Tank No. 1 to the 100,000 gallon tank No. 2, located at the Well 2 site, at an elevation of 835 feet msl. Well No. 2 site is located on Makila Land Company, LLC property just mauka of Mahanalua Nui Phase III.

Water Storage:

A 400,000 gallon bolted glass-fused-to-steel control tank is located at the well site (Tank No. 1). A glass-fused-to-steel 100,000 gallon tank (Tank No. 2) is located at an approximate elevation of 835 feet msl to service Phase’s II, III and IV of the Mahanalua Nui Subdivision.

Water levels within Tanks 1 and 2 are hydraulically detected and used to control the well and booster pumps. The levels detected within Tank 2 are radio wave telemetered to the motor control building at the Well No. 1 site.



Motor Control Building:

A 34’ by 10’ single-story, concrete slab-on-grade, motor control building, with concrete masonry unit walls and concrete roof, is constructed at the Well 1 site. This building has an electrical room with state of the art electronics and a separate chlorination room.

Equipment:

Deep Well Pump Information:

Mahanalua Nui Well No.1

  • USGS ID: 5138-01

  • Ground Elevation: 633.44 ft.

  • Original date of construction:1979

  • Casing Diameter:16”

  • Bottom of Casing: -29’

  • Bottom of Well: -44’

  • Date of Pump installation: April 11, 2000

  • Pump Type: Pleuger Type Rated Capacity: 500gpm HP120

  • The well 1 pump is a multi-stage submersible turbine pump. The 2 booster pumps are multi-stage submersible. 

Mahanalua Nui Well No.2

·         USGS ID: 5137-01

·         Ground Elevation: 827.32

·         Original date of construction: 2002

·         Casing Diameter:12”

·         Bottom of Casing: (-) 3’

·         Bottom of Well: (-) 25’

·         Date of Pump installation: January 22, 2020

·         Pump Type:Submersible Electric, Goulds 5CLC- 18STG pump Rated Capacity: 100gpm HP40

·         The well 2 pump is a multi-stage submersible turbine pump. submersible.

Launiupoko Well No.3

·         USGS ID: 5238-01

·         Ground Elevation: 751

·         Original date of construction: 2008

·         Casing Diameter:14”

·         Bottom of Casing:744’

·         Bottom of Well:799’

·         Date of Last Pump installation: 4/20/2020

·         Pump Type: Hitachi Electric Motor, Goulds Pump Rated Capacity: 500gpm HP150

·         The well 3 pump is a multi-stage submersible turbine pump. submersible.

 
 
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