Current Projects

Sewer Improvements - Phase III (Basin 3)

The Sewer Improvements Phase III (Basin 3) Project will repair and rehabilitate approximately six miles of sewer main, with an estimated four miles of sewer rehabilitation by CIPP lining, and the remaining two miles of full pipe replacement. Project design began in February, 2025.  Future construction of this project will be in the Basin 3 (northwest) Diamondhead area. Seymour Engineering is the engineer that will oversee this project.

Current Status:

The design phase for the Basin #3 Sewer Improvements Project is near completion. A drawing review meeting is scheduled for next week.

Water System Rehabilitation-Phase IV Project

The Water System Rehabilitation-Phase IV Project includes the construction of new District water mains.  Project design began in November, 2024.  Future construction of this project will be on Diamondhead Drive East, between Golf Club Drive and Hilo Street. These improvements will address repetitive breaks in the existing water main and where feasible, the waterlines will be upsized.  Digital Engineering is the engineer that will oversee this project.

Current Status:

The Water Main Replacement Phase 4 Project is in the design phase. The preliminary designs have been reviewed, and the final drawing is forthcoming.

Lift Station #3 Force Main Replacement Project 
The Lift Station #3 Force Main Replacement Project intends to upgrade the existing 4" sanitary sewer force main by replacing it with a 10" sanitary sewer force main system.  The project design began in November, 2024.   Future construction of this project will be around the Diamondhead Drive North area.  Seymour Engineering is the engineer that will oversee this project.

Current Status: 

The Lift Station #3 Force Main Replacement Project is in the design phase. The final drawing is expected by April 30, 2025.

Invitation to Bid "Elevated Storage Tank Altitude Valve" - Click Here

The Tower#2 Altitude Valve Project bids were opened at the regularly scheduled Board meeting on June 13, 2024. Project was awarded to DNA Underground on August 26, 2024. Digital Engineering is the project engineer for this contract.
The Altitude Valve Project was completed in April, 2025.

The Diamondhead Water & Sewer District Board of Commissioners awarded the Lift Station 17 Force Main Replacement Project to DNA Underground on April 25, 2024.  This project will be around the Diamondhead Drive East (circle) area.  This project is for the installation of approximately 1,400 LF of 8" force main in accordance with the plans & specifications.  The work should begin in June, 2024 and last approximately 60 days with an expected completion in mid-August.  Seymour Engineering will oversee the contractor for this project.  
This project was completed in December, 2024.

The Diamondhead Water & Sewer District Board of Commissioners awarded the Lift Station 26 Pump Improvements Project to Hemphill Construction Company on April 25, 2024.  The project is expected to begin in June, 2024 and last approximately 60 days.  The work includes the removal and installation of two(2) lift station pumps along with all necessary components in accordance with the plans & specifications.  Seymour Engineering will oversee the contractor on this project.
The Lift Station #26 Pump Improvements Project was completed in March, 2025.  

The Diamondhead Water & Sewer District Board of Commissioners awarded the bid for this project to Tank Pro, LLC on July 28, 2022.  The existing Water Tower #1 will have the exterior painted in the same color in accordance with contract specifications.  The project is scheduled to begin in September, 2022 and last approximately 75 days. All work being performed will be securely contained and non-hazardous to any property or people. The Project Engineer is Digital Engineering who will oversee the contractor during this project. This project was completed in June, 2023.

Current Status:

The design for the Water Tower #1 Repaint Project is complete. A follow-up review meeting is scheduled for April 14, 2025. Legal counsel is pursuing legal proceedings to seek reimbursement of all damages. 

The Diamondhead Water & Sewer District Board of Commissioners awarded this project to DNA Underground in April, 2022.  A Notice to Proceed was issued in June, 2022. This project involves the removal and installation of water mains, service lines, valves, and fire hydrants.  Construction is expected to begin in August, 2022. The project is expected to last approximately 12 months.   Seymour Engineering will be the Project Engineer and oversee the contractor during this project. The Water System Improvement Phase III Project was completed in May, 2024.

The Diamondhead Water & Sewer District Board of Commissioners awarded this contract to CB Developers in March, 2022.  This project consists of the replacement and installation of water mains, service lines, valves, and fire hydrants and is expected to last approximately 365 days. Digital Engineering will oversee this contractor during this project. The Water System Improvement Phase II Project was completed in April, 2024.

The Diamondhead Water & Sewer District Board of Commissioners awarded this project to Suncoast Infrastructure in March, 2022.  This project consists of the repairs, replacement and lining of existing sewer mains, services, and manholes in accordance to the project specifications. Seymour Engineering will oversee the contractor for this project.  The project is expected to last 730 calendar days.

The Sewer Improvements Basin 13, 16, & 17 Project was closed in July, 2024,  closing at $464,175.08 under budget. This project was a $6.2 million rehabilitation and replacement of sewer main piping within sewer basins 13, 16, and 17. 34,030 LF (6.5 miles) of sewer main piping were replaced/relined, 241 sewer service laterals were relined, and 58 manhole structures were lined or replaced.

The Diamondhead Water & Sewer District Board of Commissioners awarded this project to CB&I Storage Tank Solutions in December, 2021 and will take approximately 450 days, with expected completion in Summer 2023.  The project consists of the construction of a 750,000 gallon elevated water tank. This tower will mirror the design and color of the existing Water Tower #1.  The new Water Tower #2 will be located on East Aloha Drive. Digital Engineering is the Project Engineer who will oversee the contractor on this project.  The Elevated Water Tank Project was completed in April, 2024.

The Diamondhead Water & Sewer District Board of Commissioners awarded the Water Main Replacement Project - Hilo St. in July, 2021 to DNA Underground.  Construction work began in August, 2021 along Hilo St. into Maui Circle, Hilo Way and Lanai St. Contractors began installing new mainline piping underground from Diamondhead Drive East and continue north on Hilo St. Seymour Engineering is the Project Engineer who will oversee the contractor on this project. Expected completion is August, 2022.   The contract was completed with a $1,128.00 credit Change Order due to differences in open cut excavation versus directional drilling of the piping and adjustments to quantities. Project was completed within the scheduled time and below budget.

To view a map of the project area click here.

To see the Water System Improvements 5-year Plan Map click here.

To see full image of Sewer Basin Improvements 5yr Plan Map click here

The 5-Year Capital Improvement plan includes: (Link below shows a map of project locations)

• Water Main Improvements Phase I (Southeast - Hilo Street)
• Water System Rehab. Phase I - New Water Tower
• Water System Rehab. Phase II Project
• Water System Rehab. Phase III Project
• Sewer System Improvements Phase I & II - Basins 13,16, & 17
• Hydrant/Fire Flow Improvements
• New Pumps for Lift Stations #16, #19, #28
• Well System Improvements
• Sanitary Sewer Hydraulic Model
• Sewer Cleanout Improvements
• Equipment Replacement

Click here to see the 5 Year Infrastructure Improvements Map

The CCTV / I & I Department was developed to prevent Inflow & Infiltration into the collection system. The Infiltration & Inflow crews survey sewer mains to identify and locate potential problem areas.

Learn more about Inflow & Infiltration and see our action photos!