..Title
Consider and take action on a resolution authorizing a professional services agreement with Ardurra Group, Inc. for design, bid, and construction phase services related to the SH 3 BPS Chemical Feed Building & Storage Project (WT2402) in an amount not to exceed $525,000 (Executive Director of Capital Projects)
Background:
Approval of this resolution will authorize a professional services agreement with Ardurra Group, Inc. for design, bid, and construction phase services related to SH 3 BPS Chemical Feed Building & Storage Project (WT2402) in an amount not to exceed $525,000.
The purpose of this project is to design a Sodium Hypochlorite-LAS system to improve disinfectant residuals from the City of Houston SEWPP 42-inch transmission water line and increase chemical storage capacity. In 2014, as a stop gap solution, a trailer-based portable chemical feed system was installed at the SH 3 Booster Pump Station as a cost savings effort to feed as-needed chemicals to boost or sustain disinfectant residual during everyday operations. Since the 2014 installation, water production operations has experienced multiple summer seasons where unusual high demands created the need to boost Chloramine residuals in the ground storage tanks located at SH 3. The existing small system lacks adequate storage and chemical boosting to maintain regulatory compliance, at times. Additionally, current chemical and storage system is not adequate to accommodate the ultimate design capacity of 43.9 MGD at the booster station.
The SH 3 BPS plays a critical role in the City’s potable water distribution system. With the installation of 36-inch transmission line in 2024 to supply adequate water to the east of the City, this SH 3 BPS has become even more a vital component of the City’s overall water source, supplying potable water through the old SH 3’s 42-inch and 39-inch water transmission lines as well as the new 36-inch line. Upgrading the chemical feed system to a permanent building and provide chemical storage space to meet the current and future demands has become a priority for the water production operations.
In 2025, staff engaged a consultant to investigate current system and provide chemical feed system options, building & storage layouts, and costs. A Sodium Hypochlorite feed system was found to be more economical and safer than a Chlorine Gas feed system. Therefore, staff is proposing a permanent CMU building to house the recommended chemical feed system and chemical storage with associated mechanical and electrical components. The chemical feed system will be equipped with analyzers for Chloramine and Liquid Ammonia Sulphate (LAS) with leak detection and fire suppression.
Ardurra Group, Inc. has submitted a proposal to perform the design, bid, and construction phase services for the project which includes the following major tasks:
1. Design Phase $ 388,900
2. Bid Phase $ 14,900
3. Construction Phase Services $ 80,000
4. SWPP $ 4,300
5. ADA-ACI Review $ 3,900
6. Miscellaneous Expenses Budget $ 6,000
7. Stormwater Quality with Report $ 7,000
8. Additional Services Budget $ 20,000
Total $ 525,000
Design is proposed to be completed within 225 days, excluding City reviews. Construction is programmed for the FY2028 CIP. Consultant has provided a pre-design construction estimate of $4,176,000 for the project. This estimate will be updated at design milestones.
Attachments:
1. Proposed Resolution
2. Exhibit A - Professional Services Agreement w/Proposal
3. Aerial Map of SH 3 BPS
4. Conceptual Building Layout
5. CIP Project Sheet
6. CIP Aerial Map
7. Vendor Report Card
FUNDING
{X} Funding in the amount of $525,000 is available from fund Utility Capital Project Fund, fund 1055, with expenses charged to project expense string WT2402-PLAN DESIGN- DESIGN - RS CASH
STRATEGIC PLANNING
{X} Addresses Strategic Planning Critical Success Factor #1: Develop and Maintain our Infrastructure.