The Don Rodenbaugh Natatorium was designed in 2001 with construction finished in 2002. The facility provides a leisure pool and swim lanes to both Allen residents, pool members, and the AISD swim team. It is operated and maintained by the Parks and Recreation Department, who are also responsible for repairs and oversight of the facility.

The Natatorium still has the original roof from its construction nineteen (19) years ago. The roof was inspected in 2018 for a condition assessment and deemed to be in poor condition and need of replacement.  During the same year, leaks and moisture intrusion was discovered from the investigation of the roof.  A report was compiled showing that the roof had been laid in a manner that did not comply with current roofing standards, with entire sections of the facility without proper environmental protection. Given the expense involved, long-term programming was needed to appropriate funds.  Coincidentally, in 2019, during the annual budget process, staff requested replacement of the Dectron Heating Ventilation & Air Conditioning (HVAC) system that maintains environmental controls. Investigation in 2019 had revealed that the system was requiring increasing cost of maintenance. This assessment was in alignment with the prior roof investigations, now explaining why the Dectron units were overloading, since they were trying to condition a space that had large amounts of external air penetration.

Tax notes were sold to fund an engineering investigation into the system to determine viability of the system and design a replacement.

In October of 2020, an engineering firm, BHB Inc., was contracted to do a study on the mechanical components.  During this time it was determined that portions of the system were inactive and that the units had excessive downtime, were unable to maintain humidity and temperature within the Natatorium pool area, and was costing the city between $40,000 to $50,000 in repairs annually. The high humidity within the Natatorium's pool area resulted in damage to the security systems and electronics in the area.  Another aspect of the system that had failed with this system is the supplemental heating to the pool water, using the heat exchangers as part of its operation. When functional, this saves the facility money and increases efficiency as it reduces the energy requirement and loads on the existing boiler unit. This water heating element has been broken for several years now. Replacement of the unit will renew this capacity.

The area of the roof that the Dectrons were located showed a great deal of patches and large amounts of ponding water. The original design of the vents and other mechanical, electrical, and plumbing components positioned these elements on the roof such that maintenance was difficult and rain, condensation and water discharge was not ideal. Since the roof was known to be in poor condition, and the roof-mounted HVAC units were needing replacement too, efforts were underway to coordinate the two replacements, given their interdependence. A detailed roof investigation helped determine the best path forward to fix the roofing and bring it into compliance with current code, while undertaking HVAC system replacement.

Due to the sheer extent of the repairs that are required, the project has been split into two phases. This was done for multiple reasons. The roof design was a simpler portion of the project and could be rapidly engaged once funding was available.

Phase 1 of the project replaces the roof over the pool, lobby, gym, and changing rooms. This accounts for about 80% of the facility roofing. The reason to do this area first was two-fold. There are few mechanical units and penetrations in these areas and the repairs could be done faster and at a time so as not to disturb the pool access for the Allen Independent School District's swim team and the general public. The second reason is that it represents the largest air leaks into the pool facility and is responsible for the overworked HVAC system, by replacing it before the Dectron units are replaced it will keep the new system from being overworked and provide time to seal the pool, while keeping the rest of the facility operational.

Phase 2 of the project replaces the roof, mechanical, electrical, and plumbing components that require change over the bleachers, sitting area, and pump room. This will require the shutdown of the pool facility as it will involve disconnecting the plumbing, electrical, and mechanical systems that are necessary for pool operations. During the execution of Phase 2, staff is also intending to use the downtime to replace the slide in the leisure pool and perform other repairs and maintenance.  Phase 2 (involving HVAC work and remaining roof) will not be awarded for construction until Spring/Summer of 2022, after the AISD competitive swim schedule is concluded.

Designs were developed and additional funds requested, which were authorized in the Series 2020 Tax Notes by the Allen City Council. The Garland Company and BHB Engineering were engaged to address the smaller area and prepare construction documents as well as perform an energy efficiency study.

A request for Proposal (RFP) process was used in acquiring pricing for Phase 1 of the project and a total of five (5) responsive bids were received.  The three lowest bids are below:

Solicitation 2021-12-33

In December 2020, the City of Allen held a Request for Qualifications (RFQ) for roofing and weatherproofing manufacturers. This process focused on providing the city the best materials, service, and warranties possible for our facilities. The Garland Company was one company selected during this process and provides detailed specifications for roofing and waterproofing projects. The materials are ordered from Garland and their subsidiary companies and come with a full warranty pursuant to conditions mandated in the RFQ.

To save 10-15% on contractor markup, staff proposes to purchase material directly from The Garland Company in the amount of $554,614. Heritage One Roofing, Inc., was responsible for providing a materials take-off list within their bid to specify quantities of materials needed.  In accordance with our contract, unused materials shall be returned to the supplier and the city will be refunded; likewise, if additional materials are required, overages shall be purchased at the Contractor's expense. These materials will be shipped to and stored on city site in a protected area erected by Heritage One Roofing, Inc. The city will pay for the shipping costs which will be determined at the time of transport.

This project will be funded in part with Tax Notes, approved by the Allen City Council on July 14, 2020. The roof replacement was listed among the recommended projects for an estimated $1,600,000. Consequently, this first phase is within the budgeted amount.

Initially the project was conceived as two separate projects, an HVAC and a roof replacement. The HVAC replacement was requested in 2019. Initial funding for the engineering and investigation was made possible with 2019 tax notes. During the engineering investigation the roof was identified as an item that needed replacement and possible funding was identified using 2020 tax notes and general fund revenues within the Facilities Maintenance Fund in the annual budget. Any additional funding will be taken from savings in the 2019 Tax note projects.

Staff recommends to Award Bid and Authorize the City Manager to Execute a Contract with Heritage One Roofing, Inc., for Labor, Equipment, and Installation in the Amount of $478,725 and with The Garland Company for Materials in the Amount of $554,614 for the Don Rodenbaugh Natatorium Roof Replacement Project Phase 1 for a Total Project Amount of $1,136,673.

I make a motion to authorize the City Manager to award bid and to execute a contract with Heritage One Roofing, Inc., for labor, equipment, and installation in the amount of $478,725 and with The Garland Company for the materials in the amount of $554,614 for the Don Rodenbaugh Natatorium Roof Replacement Project Phase 1 for a total project amount of $1,136,673.