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HomeMy WebLinkAboutbocc.con.amended.015.24 B8/30/2021 CDD Contract Information Contract Number Project Name Contractor Budget Line Item 41652150.572500 Procurement Method: Type: Contract Start Date Contract End Date Contract Type Retainage If this is a new contractor, please enter the New Vendor information into Munis for workflow approval. Contact Information: Department County Representative Tyler Carvell County Representative Phone (970) 456-3864 Provide a brief description of the Contract or Change Order: Contract Value Summary: $ 1,266,027.00 $ - $ 665,847.00 $ 1,931,874.00 Solid Waste Center Change order to incorporate additional scope of work; allocation of $665,847.00 Original Contract Amount Previous Change Order/Amendment Amount This Change order/Amendment amount Contract Total No Solid Waste Center Architectural Design Services Weaver Consultants Group Additional Budget Line Item(s) (Please fully allocate New Contract Total) $ 665,847.00 $ - $ - $ 665,847.00 Formal Services/Maintenance 7/29/2024 7/28/2026 Change Order/Contract Amendment 015.24 B Pitkin County Procurement Cover Sheet Please complete the Contract Cover Sheet when the contract/task order is complete and fully executed. Return all Contract Cover Sheets and Contracts/Change Orders/Amendments/Task Orders to Procurement Contract #: 015.24 Rev. 2022.08.04 CDD *Increases over $25,000 and/or 10% (single increase or accumulative) of original contract must have County Manager signature. 1 CHANGE ORDER / CONTRACT AMENDMENT Change Order Number: 015.24 B OWNER: Pitkin County, Colorado 530 E. Main St., Suite #302 Aspen, CO 81611 CONTRACTOR: Weaver Consultants Group, LLC 7340 East Caley Avenue, Suite 110 Centennial, CO 80111 The Provision of Solid Waste Center Architectural Design Services (the “Contract”) dated July 29, 2024 between the Board of County Commissioners of Pitkin County, Colorado (the “County”) and Weaver Consultants Group, LLC (the “Contractor”), is hereby amended as follows: Description of Change: 1. This amendment incorporates the additional Architectural Design Services performed by HDR Engineering and Weaver Consultants Group, further described in (“Attachment A”). 2. Allocation of additional funding not to exceed Six Hundred Sixty-Five Thousand Eight Hundred Forty-Seven dollars and Zero cents ($665,847.00) Reason for Change: Allocation of additional funding is needed to pay for additional services associated with the architectural design of the Solid Waste Center. Original Contract Amount $ 1,266,027.00 Previous Change Order/Amendment Amount $ This Change Order/Amendment Amount $ 665,847.00 New Contract Total $ 1,931,874.00 Contract #: 015.24 Rev. 2022.08.04 CDD *Increases over $25,000 and/or 10% (single increase or accumulative) of original contract must have County Manager signature. 2 In all other respects, the Contract is in full force and effect and remains unchanged by this Amendment. WEAVER CONSULTANTS GROUP, LLC ________________________________________________ !#VENDOR SIGNATURE#! Date PITKIN COUNTY, COLORADO _________________________________________________ !#DEPARTMENT REPRESENTATIVE#! Date DIRECTOR APPROVAL: ________________________________________________ !#SECTION LEADER#! Date COUNTY MANAGER APPROVAL: ________________________________________________ !#COUNTY MANAGER#! Date Tyler Carvell Solid Waste Manager Feb-26-2026 Feb-26-2026 Brian Pettet Public Works Director Melissa Green Principal Feb-27-2026 Mar-06-2026 Ryan Mahoney Deputy County Manager 7340 E. CALEY AVENUE, SUITE 110 CENTENNIAL, COLORADO 80111 PHONE: (720) 529-0132 FAX: (720) 529-0137 F:\PITKIN COUNTY\ALL PROPOSALS\ARCH CHANGE ORDER\ARCH CHANGE ORDER.DOCX Weaver Consultants Group MEMORANDUM To: Tyler Carvell (via email) Pitkin County Date: February 5, 2026 From: Jacob Midkiff, P.E. Weaver Consultants Group Project: 2796-495-10-13-08 Re: Change Order for Pitkin County Architectural Design Services Pitkin County Solid Waste Center Please find the attached Change Order for providing Architectural Design Services at the Pitkin County Solid Waste Center. This change order contains the labor and supplies on ongoing projects that were not anticipated in the original Scope of Work. Weaver Consultants Group appreciates the opportunity to continue to assist Pitkin County with this work. If you should have any questions or comments, please do not hesitate to contact me at 720-529- 0132. Thank you again for this opportunity. Attachment Attachment A PREPARED BY PITKIN COUNTY SOLID WASTE CENTER CHANGE ORDER ARCHITECTUAL DESIGN SERVICES PREPARED FOR PITKIN COUNTY February 5, 2026 Attachment A Weaver Consultants Group F:\PITKIN COUNTY\ALL PROPOSALS\ARCH CHANGE ORDER\ARCH CHANGE ORDER.DOCX 2/5/2026 1 STATEMENT OF WORK Project Understanding During activities related to the scope for the Architectural Design Services HDR completed several tasks that were outside of the scope of work. This change order reflects the cost for those tasks. Scope of Work The tasks that are listed below have already been completed or are ongoing and anticipated to be completed in 2026: Tasks 800, 900, 1000, 1100, 1200, 1300, 1400, and 1600 – HDR Change Order WCG received two change order requests from HDR for Multiple tasks related to the Solid Waste Center Architectural Design Services. A detailed description of supplementary tasks completed is provided in the attached change order requests from HDR. Task 2 – WCG Additional Services WCG incurred cost for additional consulting and design services related to the Architectural Design Scope of Work throughout 2025. This cost reflects tasks that have already been completed. Attachment A Weaver Consultants Group F:\PITKIN COUNTY\ALL PROPOSALS\ARCH CHANGE ORDER\ARCH CHANGE ORDER.DOCX 2/5/2026 2 Budget The estimated cost to perform the proposed work is presented in the table below and will be billed on a time and has been materials basis as the project tasks are completed. WCG would note that much of the tasks listed below have been completed. Architectural Design Change Order Pitkin County Solid Waste Center Task Description Labor Costs Direct Costs Annual Task Total HDR Change Order 1 Task 800 – Seattle Site Visit and Report $19,186 $0 $19,186 Task 900 – Solar, Backup Power and BESS Design $65,898 $0 $65,898 Task 1000 – Separate Mass Grading Package $51,431 $0 $51,431 Task 1100 – ICT/ESS/AV Design $45,000 $0 $45,000 Task 1200 – Supplemental Design Modification $55,041 $0 $55,041 Task 1300 – Compressor/Baler Scope Addition $19,010 $0 $19,010 Task 1400 – FLS Scope Modification $64,281 $0 $64,281 HDR Change Order 2 Task 1600 – Water Supply 100% Design $296,000 $0 $296,000 WCG Additional Services Task 2- WCG Additional Services $50,000 $0 $50,000 TOTAL $665,847 Attachment A HDR CHANGE ORDER 1 Attachment A hdrinc.com 20 E Thomas Road Suite 2500, Phoenix, AZ 85012-3118 (602) 522-7700 Pitkin County – Solid Waste Center Recycling Campus Architectural Design Services Change Order to Weaver Consulting Group Sub-Agreement TASK 800 – SEATTLE SITE VISIT AND SUMMARY REPORT OBJECTIVE The objective of this task is to coordinate and execute a multi-site waste campus visit to up to four (4) locations in the Seattle metro area to provide Weaver Consulting Group (WCG) and Pitkin County with an overview of different operational elements that may be available in the design of the Solid Waste Center (SWC). PROJECT TEAM ACTIVITIES  HDR will evaluate multiple metropolitan area options to execute the operational site visit and provide a recommendation to WCG and Pitkin County.  HDR will provide up-front planning, communication, and coordination activities in advance of site visits. Key elements of the coordination will include development of a visit schedule and agenda, including handouts summarizing the agenda and providing points of contact for personnel.  HDR will coordinate with local HDR offices to procure safety PPE necessary to conduct the tour.  HDR will evaluate hotel, flight, and rental car options for the attendees and make recommendations to minimize cost to WCG and Pitkin County.  HDR will develop a post-visit summary report documenting key elements of the tour that Pitkin County would like to see incorporated (or not incorporated) into the SWC design. MEETINGS  None. DELIVERABLES  Draft and final post-visit summary report.  Draft and final electronic versions of technical memorandum. CLARIFICATIONS  HDR will provide three (3) individuals for the site visit, but only two (2) will be billed to WCG and Pitkin County. The third individual will be covered by HDR, including labor and expenses. Attachment A hdrinc.com TASK 900 – SOLAR PACKAGE, BACKUP POWER, AND BESS DESIGN OBJECTIVE The objective of this task is to develop a rooftop photovoltaic (PV) solar package and Battery Energy Storage System (BESS), including engineering design package and bid documents for Pitkin County’s proposed Solid Waste Center to a level of detail typical for competitive bidding. PROJECT TEAM ACTIVITIES  HDR will provide engineering services to support the design of rooftop PV solar on new buildings at the SWC. The scope will integrate with the existing 30% design provided to Pitkin County on March 28, 2025. The following buildings are included: o Scalehouse o Motherlode Mercantile o Household Hazardous Waste Facility (HHW) o Recycling Campus The Washbay structure design will not include PV design.  A BESS has been requested by Pitkin County as a source of backup power for the Scalehouse and will be integrated into the PV system. The BESS will be an outdoor-rated skid solution and located a sufficient distance away from the SWC buildings to minimize impacts to the fire and life safety considerations detailed in the 30% design. The BESS will be based on lithium-ion chemistry. Between 60% and 90% design, at the request of Pitkin County, a design shift occurred to incorporate backup power to the network and associated cooling systems at the Motherlode Mercantile, as well as a Code-required shift to include backup power to mechanical ventilation systems at the HHW. HDR developed an evaluation of backup power distribution options for the purpose of assisting Pitkin County in determining BESS sizing and backup power operations. This resulted in a load-shedding approach to the distribution system that was incorporated into the design. The BESS is designed to provide backup power for approximately 12 hours.  PV solar is intended to be installed at each building. The PV system at the Scalehouse will be connected behind the meter and participate in net metering, offsetting utility consumption. Due to Holy Cross Energy (HCE) requirements, the PV systems at the other buildings will be connected in front of the meter, and generated energy will be credited at the established tariff rate. During an outage, all PV will drop offline except for the behind-the-meter system at the Scalehouse, and the BESS will provide immediate backup power to the Scalehouse and the Code-required ventilation at the HHW. PV will recharge when available.  HDR will design the buildings to be capable of supporting the additional load of the PV system. The building warranty will include consideration for the PV system as required by the bid documents. The buildings will be designed for standing-seam metal roofs. Attachment A hdrinc.com  HDR will provide performance-based drawings and specifications to support the design and construction of the PV network and BESS. The drawings will include sufficient detail to convey design intent and scope. The specifications will provide system material and performance requirements. HDR assumes the final system design will be provided by the contractor under delegated design. o Drawings – Drawings will include array layouts, one-line diagrams up to the point of interconnection, wiring and conduit details, panel support details, safety labels, and communication details. The drawings are diagrammatic and intended to convey design intent and coordinate interferences and allowances with the building design. The BESS location will be established and shown on the Civil Plans. o Technical Specifications – HDR will provide a performance-based specification outlining material requirements as well as system performance requirements for the PV network and BESS.  Calculations – HDR will use PVsyst software to develop an energy model for each of the proposed systems. The models will be based on the system designs, local meteorological conditions (NSRDB TGY), and typical input/loss parameters. The models will provide the estimated energy generation over the course of the first year of operation. MEETINGS  One (1) meeting to discuss design criteria for the PV system with Pitkin County.  One (1) meeting with representative from Holy Cross Energy to discuss the net metering requirements and credits available to Pitkin County. DELIVERABLES  Design Drawings (in accordance with full SWC design schedule, starting at 60%).  Technical Specifications.  Energy Analysis Summary with PVsyst Reports and 8760 files. CLARIFICATIONS  Final system design, including PE-sealed drawings and calculations, will be provided by the design- build contractor.  PV Solar scope for this task includes budget for 12 hours of permitting and building code support, 30 hours for Construction Administration and RFI support.  Utility coordination/outreach is excluded. HDR will provide technical inputs to support interconnection applications/discussions.  The design will provide control specifications, including required operational modes and system criteria. The ultimate design and implementation of the control scheme will be provided by the contractor and/or equipment supplier.  Design will provide a data connection to a location identified by Pitkin County. Modification to existing SCADA/Telecom equipment is excluded. Attachment A hdrinc.com  Energy production estimate is not intended to be a Pro Forma level estimate of production but rather a tool to compare layout and design scenarios and for Pitkin County information.  Buildings will have thirty-five (35) percent total roof space constructed for solar gain as stated in the Solar Roof-Readiness Standard within Chapter 7 – Development Standards of the Pitkin County Land Use Code.  HDR has assumed one round of review and comment incorporation at each design milestone. TASK 1000 – SEPARATE MASS GRADING PACKAGE OBJECTIVE At the request of Pitkin County, HDR developed a mass grading package (MGP) to support expediting the SWC construction schedule. By advancing this portion of the design with the 30% Design Documents deliverable, Pitkin County was able to bid and begin site grading work earlier than the balance of the project. Final grading, utilities, and remaining site development will be delivered under the subsequent full design package. PROJECT TEAM ACTIVITIES  Developed a mass grading design to prepare the site for future construction, provide proper drainage, and stability.  Prepared detailed grading plan options that included cut/fill calculations, rough grading for future building pads, erosion control details, and slope ratios.  Incorporated soil testing and analysis from the previously scoped geotechnical study to inform grading techniques and soil stabilization measures.  Produced earthwork and front-end specifications sufficient for competitive bidding.  Developed MGP deliverables with the intent of compatibility and ease of integration into the final design package.  Integrated mass grading design with ongoing design activities for other projects (performed by others) on the Pitkin County SWC Site including leachate pond design, leachate tank removal, storm water pond design, and overall site stormwater analysis.  Revised 30% DDs (MGP draft) that included updated access road grading and steep-slope analysis.  Incorporated construction phasing such as temporary road to existing facilities and reflecting mass grading activities as complete in final construction documents. MEETINGS  Three (3) virtual meetings to discuss the mass grading design and bid package with up to four (4) project team members. DELIVERABLES  Draft and Final bid package for the MGP. Attachment A hdrinc.com CLARIFICATIONS  The MGP was prepared at Pitkin County’s request to accelerate the overall schedule; this scope represents additional effort that would not otherwise have been required. While the specifications and design elements from the MGP will be carried forward into the final package, the balance of the site and utility design will still require full development and is not reduced in scope by the early release of the MGP.  The County provided electronic files of any required terms and conditions or front-end documents to incorporate into construction contract documents.  There is inherent risk in releasing the MGP ahead of the full design. Subsequent design progression may necessitate adjustments to the mass grading work. Such revisions, if required, may result in additional design effort or changes to construction sequencing and costs.  Permitting support and coordination with local and state regulators to authorize the civil grading construction of the MGP is being handled by others.  The Project Team’s standard specifications will be utilized, and front-end documents will be developed using modified Engineers Joint Contract Documents Committee (EJCDC) documents.  Design drawings were prepared using AutoCAD Civil 3D.  The County will be responsible for processing any permit fees required.  Fee assumes that the MGP will be the first of two (2) overall bid packages that will be developed for the project. TASK 1100 – ICT/ESS/AV DESIGN OBJECTIVE At the request of Pitkin County, HDR provided Information Communication Technology (ICT), Electronic Security Services (ESS), and Audio Visual (AV) design services for the SWC. This represents an expansion of HDR’s typical scope of work. HDR’s typical role for these services is limited to providing pathway and conduit rough-in, allowing owners to customize and install ICT/ESS/AV systems directly. In this case, Pitkin County requested HDR to complete full engineering design documents and bid-ready specifications to provide consistency, facilitate competitive bidding, and reduce coordination risks during construction. PROJECT TEAM ACTIVITIES  Developed ICT/ESS/AV design scope for the following facilities: Scalehouse, Motherlode Mercantile, Household Hazardous Waste, and Recycling Campus.  Integrated ICT/ESS/AV design with the 30% submittal previously provided to Pitkin County (March 28, 2025).  Incorporated design revisions stemming from client-directed changes at the 90% milestone, requiring rework to align with updated County requirements.  Prepared engineering documents to a level of detail suitable for competitive bidding and construction. Attachment A hdrinc.com Information Communication Technology Scope 1. Horizontal Cabling (Category cabling to the edge device) a) Wireless Access Points (Preliminary locations; Performance Specification) b) Workstation/Network drops 2. Backbone Cabling a) Fiber optic cabling from Main Telecommunication Room (MTR) to remote Telecommunication Rooms (TR). b) Underground OSP infrastructure from the ISP point of connection. c) Underground OSP infrastructure from the Scalehouse to incorporate the existing facility, and three other new facilities, into a campus network structure. 3. EF and TR Design, Layout, Elevations and Details 4. Cable Tray and Pathways 5. Bonding and Grounding 6. Coordination with County’s IT Department to implement specific standards (BICSI and TIA) 7. Public Address -optional, may be added for negotiated fee Electronic Security Services (ESS) Scope Access Control Scope: 1. Card Readers, Door Contacts, Alarms, Badging, Monitors 2. Coordination with County’s designee Video Surveillance Scope: 1. Camera specifications and locations (interior, exterior, and fence line) 2. Video Server Design 3. Riser Diagrams and Details 4. Cameras and video system will be coordinated with Owner’s security representative 5. Intercom System at secured door control points Audio Visual Scope 1. Rough-in design included in ICT scope and fee. 2. Full equipment selections and integrated AV solutions may be provided for an added negotiated fee. MEETINGS  No additional meetings were required. Coordination with Pitkin County was completed within existing project meetings. Attachment A hdrinc.com DELIVERABLES  ICT/ESS/AV Design Drawings (aligned with SWC design schedule starting at 60%).  Technical Specifications CLARIFICATIONS  Assumes one round of review and comment incorporation at each design milestone.  The following services are excluded but can be provided as an additional negotiated fee: o Wireless Access points modeling o Digital Antenna System (DAS)– Performance Specification o Active network equipment design, including switches and servers o Perimeter Intrusion Detection System o Emergency Responder Radio System o Two-Way Radio System o Emergency Staff Assist (Panic Alarm System) o Cable TV/Master Antenna TASK 1200 – SUPPLEMENTAL DESIGN MODIFICATIONS OBJECTIVE As part of two meetings that occurred prior to the 30% deliverable, modifications to the original scope were initiated by Pitkin County. It was recognized and authorized at the time that this additional effort should be made and would be appropriately compensated as part of a future change order. PROJECT TEAM ACTIVITIES  As directed in the meeting on February 6th, 2025, HDR incorporated the following design revisions: o Relocation of buildings and regrading to incorporate a Z-wall o Adding grade separation to the Recycling Campus o Adjusting the developable area to fit within the property limits o Adding return-access to the entrance scales Due to the close proximity of structures at this point in the design, modification to the footprint or elevation impacted grading across a large portion of the design area. These efforts also involved repeating vehicle movement modeling, additional alignments of the entrance road, revising the stormwater management approach, and overall grading modifications.  Within addendum #1 of the original RFP communication, Pitkin County noted that the proposal should assume that all buildings will be assumed to be Pre-engineered Metal Buildings (PEMB). As part of the design process, mass timber was selected as the preferred approach for both the Scalehouse as well as the Motherlode Mercantile to improve the overall aesthetic features of the project. This feature required additional design hours for structural modeling and evaluation. Mass timber structures require more detailed engineering (as opposed to standardized Attachment A hdrinc.com manufacturer systems with PEMB), including additional modeling, detailing, and tighter coordination with other disciplines.  The original scope for the Washbay was based on a simple structural assessment to support adding a roof over the existing truck wash pad. However, early design investigations revealed significant complications that were not anticipated at the time of proposal. The Washbay is located immediately adjacent to the existing maintenance facility, and the proximity of that facility’s foundations required more detailed evaluation than a standard roof-over assessment would entail. To avoid demolition of the existing concrete pad and to prevent conflicts with the maintenance facility footings, HDR evaluated multiple structural and geotechnical scenarios. This included several modeling iterations to assess load paths, bearing capacity, differential settlement risks, and feasible column locations within the highly constrained site. Each scenario required coordination with architectural and cost estimating teams to evaluate constructability and budget impacts. Additionally, several buried utilities conflicted with potential column locations and foundations. Their depth, condition, and alignment required added investigation and coordination with civil, structural, and utility disciplines. The effort to navigate these constraints necessitated further analysis beyond what was originally envisioned. MEETINGS  No additional meetings were required. Coordination with Pitkin County was handled within previously established recurring meetings. DELIVERABLES  No separate deliverables were required. These modifications were incorporated into the 30% deliverable that was submitted at the end of March 2025. TASK 1300 COMPRESSOR/BALER SCOPE ADDITION OBJECTIVE At the request of Pitkin County, HDR provided compressed air design services for the HHW. These services will support the existing baler and include compressed air reels throughout the facility to accommodate daily tool usage. PROJECT TEAM ACTIVITIES  Performed compressor sizing calculations to determine the appropriate compressor needed to support: o An existing cardboard/plastic baler that will be relocated within the new HHW. o Three to four compressed air reels distributed throughout the facility to supply air for tools used in daily operations.  Determined an appropriate location for the compressor within the HHW and designed the compressed air piping layout to serve both the baler, at the location specified by Pitkin County, and the distributed compressed air reels. MEETINGS AND CORRESPONDENCE Attachment A hdrinc.com  No additional meetings were required. Coordination with Pitkin County was completed within existing project meetings. DELIVERABLES  The 100% design package will include the compressor equipment layout, compressed air piping layout, associated details, and specifications. CLARIFICATIONS  During a meeting with Pitkin County on July 17th, 2025, it was stated that the existing compressor located at the existing Maintenance Facility may be sufficient to support the HHW facility. HDR conducted compressor sizing calculations to verify whether this compressor can meet HHW’s requirements before finalizing compressor selection. The results were submitted to Pitkin County for compressor selection review and approval.  As noted in the same meeting, Pitkin County confirmed that the existing baler is the only equipment within the HHW facility requiring compressed air. Therefore, compressor sizing calculation and piping design were based solely on the baler and the compressed air reels with no additional equipment considered. TASK 1400 FLS SCOPE MODIFICATIONS OBJECTIVE At the request of Pitkin County, HDR provided design services for the implementation of a Cutoff Room at the Household Hazardous Waste (HHW) facility. This modification will isolate bulk flammable liquid and aerosol storage, thereby minimizing overall fire protection requirements, reducing fire tank sizing, and simplifying long-term operations. HDR’s original design scope assumed an H-3 occupancy classification and compliance with prescriptive code criteria adopted by Pitkin County. The contract established that departures from prescriptive criteria, including waivers, equivalencies, or performance-based alternatives, would require additional effort and a modification to scope and fee. During design development, the nature, quantity, and segregation of hazardous materials required reclassification of the HHW to H-2 occupancy. This higher-hazard classification triggered more robust fire protection, explosion control, and life safety measures than originally anticipated. This includes code-driven requirements for explosion control, hazardous ventilation and associated controls, secondary containment, and the trickle-down impacts to other design disciplines such as mechanical, electrical, structural, fire alarm, and architectural. Throughout the design effort, HDR was required to undertake additional work to address the divergence between the prescriptive NFPA code path and the non-prescriptive, insurance-driven criteria required by Factory Mutual (FM). Unlike a typical prescriptive or turnkey FLS design for HHW facilities, where system requirements are well established, FM criteria rely on performance-based interpretations and project- specific risk evaluation, requiring additional technical analysis and documentation. To support decision-making by Pitkin County, HDR developed several detailed technical memoranda, validated design assumptions, and evaluated multiple compliance strategies under both NFPA and FM frameworks. A further complicating factor was the known limitation of the available water supply, which required HDR to balance the stringent FM and H-2-type separation and protection thresholds against realistic hydraulic performance and achievable system configurations. Identifying a viable solution under these constraints Attachment A hdrinc.com necessitated additional modeling, sensitivity checks, and tank size optimization to provide cost savings to Pitkin County. The resulting incorporation of the Cutoff Room and reduced tank sizing represents the County’s selected approach after HDR’s evaluation of numerous alternatives. This solution was only reached following non- prescriptive design effort to interpret insurance requirements, assess their impact on facility layout and water demand, and develop a practical, defensible path forward. PROJECT TEAM ACTIVITIES  Prepared technical memoranda analyzing applicable fire code and FM Global insurance requirements for the HHW. This included evaluating the feasibility and benefits of adding a Cutoff Room.  Upon Pitkin County’s approval, advanced the HHW design to integrate the Cutoff Room, requiring modifications across multiple disciplines: o Mechanical: Additional mechanical design effort was required to reassess and resize the hazardous exhaust systems once the decision was made to isolate vapors within the Cutoff Room. This included revising airflow and capture calculations, updating equipment selections, and modifying duct routing to align with the non-prescriptive FM requirements. HDR also conducted additional analysis to ensure proper separation between conditioned spaces, maintain pressure differentials, and prevent potential cross-contamination of vapors to adjacent areas. These revisions necessitated multiple coordination cycles with architectural, electrical, and structural disciplines to maintain system compatibility. o Electrical: To comply with the more stringent criteria, HDR performed additional electrical analysis to limit hazardous-classified areas exclusively to the Cutoff Room. This required re- evaluation of equipment placement, boundary definitions, and classification mapping. The work reduced the extent of required rated fixtures, conduits, and devices elsewhere in the facility, but increased the design effort associated with developing a clear and defensible classification strategy. o Structural: The structural team was required to confine and validate explosion venting requirements specifically for the Cutoff Room, which necessitated additional coordination with FM guidelines and specialized venting criteria. This effort included evaluating wall and roof assembly performance, developing detailing for venting pathways, and assessing structural implications to ensure controlled pressure relief. Additional design and coordination were required for PEMB foundation adjustments, interface conditions at the Cutoff Room enclosure, and required modifications to containment pits or supporting slabs that resulted from the revised fire protection strategy. o Emergency Power: HDR performed additional analysis and design to integrate Cutoff Room ventilation into the facility’s emergency power system. Because the County’s selected approach requires maintaining ventilation for a minimum of two hours under Level 1 standby requirements, the electrical team evaluated generator loading, distribution impacts, transfer switching, and system redundancy considerations. These analyses were performed in conjunction with the BESS emergency power loads, necessitating additional coordination to balance both systems within the available standby capacity and operational constraints.  Documented modifications in alignment with the H-2 classification requirements within the Basis of Design. Attachment A hdrinc.com MEETINGS AND CORRESPONDENCE  No additional meetings were required. Coordination with Pitkin County was completed within existing project meetings. DELIVERABLES  The 90% design package will include incorporation of the design modification based on inputs from Pitkin County on August 7, 2025, and the reclassification to H-2 occupancy. The 90% design for the HHW lagged the 90% package for the rest of the facility due to the timing of this determination. The 100% design will be integrated as a full design package. CLARIFICATIONS  During a meeting with Pitkin County on August 7, 2025, Pitkin County authorized HDR to proceed with the design of the HHW as outlined in the technical memoranda. The design has not been reviewed by the FM Global insurance representative and final approval from the local AHJ has not been received. COMPENSATION AND FEE SCHEDULE The Consultant estimates the Scope of Services detailed herein can be completed for the fees detailed in the table below: Task Description Total Task Series 800 – Seattle Site Visit and Report $19,186 Task Series 900 – Solar, Backup Power and BESS Design $65,898 Task Series 1000 – Separate Mass Grading Package $51,431 Task Series 1100 – ICT/ESS/AV Design $45,000 Task Series 1200 – Supplemental Design Modifications $55,041 Task Series 1300 – Compressor/Baler Scope Addition $19,010 Task Series 1400 – FLS Scope Modifications $64,281 Total $319,847 Additional Services HDR is prepared to provide Additional Services, if requested by the County. These Additional Services are not part of the basic services fee (compensation) provided herein. A refined scope and compensation structure would be provided to initiate the Additional Services. Attachment A HDR CHANGE ORDER 2 Attachment A hdrinc.com 20 E Thomas Road Suite 2500, Phoenix, AZ 85012-3118 (602) 522-7700 Pitkin County – Solid Waste Center Recycling Campus Architectural Design Services Change Order to Weaver Consulting Group Sub-Agreement TASK 1600 WATER SUPPLY 100% DESIGN OBJECTIVE The objective of this task is to develop a 100% design package for the domestic water system to meet EPA drinking water regulations and design criteria from the Colorado Department of Public Health and Environment (CDPHE). The design package will include drawings and specifications and a CDPHE permit to construct. PROJECT TEAM ACTIVITIES  HDR will investigate the existing domestic water system including the existing groundwater well.  HDR will determine the classification of the new water system per EPA drinking water regulations.  HDR will develop new drawings and specifications for the domestic water system, including storage, pumping, and water quality monitoring.  HDR will provide Bluebeam updates to existing drawings needed to implement the domestic water system design.  HDR will prepare permit applications for approval by the CDPHE for a new public water system. MEETINGS AND CORRESPONDENCE  Four (4) site visits for coordination of the domestic water system including field reconnaissance, well sampling, and well pump investigation.  Six (6) virtual meetings with WCG and Pitkin County staff for discussion of the domestic water system.  Two (2) meetings with the CDPHE to discuss permitting for the new water system DELIVERABLES  Draft and Final 100% Design Drawings  Draft and Final 100% Design Specifications CLARIFICATIONS  It is assumed that domestic and fire water will be hauled from City of Aspen (since the existing groundwater well is not currently viable as determined by the investigation completed as part of this change order request).  It is assumed that the new water system will consist of the following: potable water receiving station, domestic water storage tanks, domestic water booster pumping, chlorine boosting system with recirculation pump, and water quality monitoring system.  It is assumed that the existing Maintenance Building will receive domestic and fire water from the new domestic water system and new fire water system, respectively (i.e. hauled water). Attachment A hdrinc.com  It is assumed that the water system will be a public water system (PWS) with a classification of transient non-community.  It is assumed that the new Domestic Pump House will be a prefabricated metal building to match the other new buildings being constructed on the site.  It is assumed this element of the work will be executed by Change Order with the selected contractor after the project is awarded.  It is assumed that updates to existing drawings included in the Issue for Bid set will be made by Bluebeam.  No investigation will be made into a new well. COMPENSATION AND FEE SCHEDULE The Consultant estimates the Scope of Services detailed herein can be completed for the fees detailed in the table below: Task Description Total Task Series 1600 – Water Supply 100% Design $296,000 Total $296,000 Additional Services The Consultant is prepared to provide Additional Services, if requested by the Company. These Additional Services are not part of the basic services fee (compensation) provided herein. A refined scope and compensation structure would be provided to initiate the Additional Services. Attachment A Certificate Of Completion Envelope Id: 89EE77C8-24B2-4BE6-A860-11FA3F991DC4 Status: Completed Subject: Weaver Consultants Group, LLC | Pitkin County Change Order 015.24 B for Review & Signature Source Envelope: Document Pages: 22 Signatures: 4 Envelope Originator: Certificate Pages: 6 Initials: 1 Pitkin County Procurement AutoNav: Enabled EnvelopeId Stamping: Disabled Time Zone: (UTC-07:00) Mountain Time (US & Canada) 530 East Main Street Suite 203 Aspen, CO 81611 Procurement@PitkinCounty.com IP Address: 65.38.144.66 Record Tracking Status: Original 2/26/2026 9:58:55 AM Holder: Pitkin County Procurement Procurement@PitkinCounty.com Location: DocuSign Signer Events Signature Timestamp Connie Baker connie.baker@pitkincounty.com Budget Director Pitkin County Security Level: Email, Account Authentication (None) Signature Adoption: Pre-selected Style Using IP Address: 74.244.9.71 Sent: 2/26/2026 10:05:26 AM Viewed: 2/26/2026 12:16:51 PM Signed: 2/26/2026 12:46:52 PM Electronic Record and Signature Disclosure: Not Offered via Docusign Tyler Carvell tyler.carvell@pitkincounty.com Solid Waste Manager Security Level: Email, Account Authentication (None)Signature Adoption: Pre-selected Style Using IP Address: 65.38.144.66 Sent: 2/26/2026 12:46:54 PM Viewed: 2/26/2026 1:27:43 PM Signed: 2/26/2026 1:27:59 PM Electronic Record and Signature Disclosure: Accepted: 2/26/2026 1:27:43 PM ID: b8799435-af6d-4e93-a8ce-f4b5df4263b6 Company Name: Pitkin County, Colorado Brian Pettet Brian.Pettet@PitkinCounty.com Public Works Director Security Level: Email, Account Authentication (None)Signature Adoption: Pre-selected Style Using IP Address: 65.38.144.66 Sent: 2/26/2026 1:28:01 PM Viewed: 2/26/2026 3:59:27 PM Signed: 2/26/2026 3:59:57 PM Electronic Record and Signature Disclosure: Accepted: 3/5/2026 10:12:28 AM ID: 1bdfe58c-11cd-482a-ab19-cfea40246d46 Company Name: Pitkin County, Colorado Melissa Green mgreen@wcgrp.com Principal Security Level: Email, Account Authentication (None)Signature Adoption: Pre-selected Style Using IP Address: 2601:280:4684:3770:e026:877d:8e8:21eb Sent: 2/26/2026 3:59:59 PM Viewed: 2/26/2026 5:07:41 PM Signed: 2/27/2026 12:24:59 PM Electronic Record and Signature Disclosure: Signer Events Signature Timestamp Accepted: 2/26/2026 5:07:41 PM ID: bcf2cf28-14b7-41bd-b046-e722a1cf7daf Company Name: Pitkin County, Colorado Ryan Mahoney ryan.mahoney@pitkincounty.com Deputy County Manager Signing Group: County Manager Group Security Level: Email, Account Authentication (None) Signature Adoption: Pre-selected Style Using IP Address: 2601:281:3:8990:6006:acbe:476e:d30 Sent: 2/27/2026 12:25:01 PM Viewed: 3/6/2026 8:23:05 AM Signed: 3/6/2026 8:26:19 AM Electronic Record and Signature Disclosure: Not Offered via Docusign In Person Signer Events Signature Timestamp Editor Delivery Events Status Timestamp Agent Delivery Events Status Timestamp Intermediary Delivery Events Status Timestamp Certified Delivery Events Status Timestamp Carbon Copy Events Status Timestamp Pitkin County Procurement procurement@pitkincounty.com Ruslana Ivanova, Procurement Specialist Pitkin County Security Level: Email, Account Authentication (None) Sent: 3/6/2026 8:26:21 AM Electronic Record and Signature Disclosure: Not Offered via Docusign Accounts Payable AP@pitkincounty.com Accounts Payable Pitkin County Security Level: Email, Account Authentication (None) Sent: 3/6/2026 8:26:22 AM Electronic Record and Signature Disclosure: Not Offered via Docusign Jade Bath jade.bath@pitkincounty.com Security Level: Email, Account Authentication (None) Sent: 3/6/2026 8:26:22 AM Electronic Record and Signature Disclosure: Accepted: 3/20/2024 10:55:07 AM ID: 15008614-3478-4231-9d34-de99cfc6aef3 Company Name: Pitkin County, Colorado Witness Events Signature Timestamp Notary Events Signature Timestamp Envelope Summary Events Status Timestamps Envelope Sent Hashed/Encrypted 2/26/2026 10:05:26 AM Envelope Summary Events Status Timestamps Envelope Updated Security Checked 2/26/2026 12:45:47 PM Envelope Updated Security Checked 2/26/2026 12:45:47 PM Certified Delivered Security Checked 3/6/2026 8:23:05 AM Signing Complete Security Checked 3/6/2026 8:26:19 AM Completed Security Checked 3/6/2026 8:26:23 AM Payment Events Status Timestamps Electronic Record and Signature Disclosure ELECTRONIC RECORD AND SIGNATURE DISCLOSURE From time to time, Pitkin County (we, us or Pitkin County) may be required by law to provide you with certain written notices or disclosures. Described below are the terms and conditions for providing to you such notices and disclosures electronically when we send you documents for electronic signature. Acknowledging your Access, Intent, and Consent to Receive and Sign Materials Electronically To confirm that you can access this information electronically, which will be similar to other electronic notices and disclosures that we will provide to you, please verify that you were able to read this electronic disclosure and that you also were able to print on paper or electronically save this page for your future reference and access or that you were able to e-mail this disclosure and consent to an address where you will be able to print on paper or save it for your future reference and access. Further, if you consent to receive notices and disclosures exclusively in electronic format on the terms and conditions described above, please let us know by clicking the 'I agree' button below. By checking the 'I Agree' box, I confirm that:  I am establishing my intent to be bound to the transaction, and indicating that I am fully aware of the purpose for which the signature is being provided.  I can access and read this Electronic CONSENT TO ELECTRONIC RECEIPT OF ELECTRONIC RECORD AND SIGNATURE DISCLOSURES document; and  I can print on paper the disclosure or save or send the disclosure to a place where I can print it, for future reference and access; and  Until or unless I notify Pitkin County as described above, I consent to receive from exclusively through electronic means all notices, disclosures, authorizations, acknowledgments, and other documents that are required to be provided or made available to me by Pitkin County during the course of my relationship with you. Signing Documents without a Pitkin County DocuSign Account: Pitkin County may not require all document signers to be authorized users of the Pitkin County DocuSign Account. Please read the information below carefully and thoroughly, and if you can access this information electronically to your satisfaction and agree to these terms and conditions, please confirm your agreement by clicking the 'I agree' button at the bottom of this document. When you don't have a DocuSign account, you will be provided the opportunity to agree to the Legal Disclosure each time you open an "envelope" for signing, at this time, you can download and retain this disclosure. Pitkin County will forward completed documents that you've reviewed, processed or signed via email. Should you require copies of these signed documents (e.g., if they get deleted from your email account) you should request those documents from Pitkin County under the Colorado Open Records Act by contacting the Pitkin County custodian who sent you the document for signature. Signing Documents with a Pitkin County DocuSign Account: Electronic Record and Signature Disclosure created on: 3/20/2020 3:28:13 PM Parties agreed to: Tyler Carvell, Brian Pettet, Melissa Green, Jade Bath Please read the information below carefully and thoroughly, and if you can access this information electronically to your satisfaction and agree to these terms and conditions, please confirm your agreement by clicking the 'I agree' button at the bottom of this document. Getting paper or electronic copies At any time, you may request from us a paper or electronic copy of any record provided or made available electronically to you by us. For such copies, as long as you are an authorized user of the DocuSign system you will have the ability to download and print any documents we send to you through your DocuSign user account for a limited period of time (usually 30 days) after such documents are first sent to you. 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All notices and disclosures will be sent to you electronically Unless you tell us otherwise in accordance with the procedures described herein, we will provide electronically to you through your DocuSign user account all required notices, disclosures, authorizations, acknowledgments, and other documents that are required to be provided or made available to you during the course of our relationship with you. To reduce the chance of you inadvertently not receiving any notice or disclosure, we prefer to provide all of the required notices and disclosures to you by the same method and to the same address that you have given us. Thus, you can receive all the disclosures and notices electronically or in paper format through the paper mail delivery system. If you do not agree with this process, please let us know as described below. Please also see the paragraph immediately above that describes the consequences of your electing not to receive delivery of the notices and disclosures electronically from us. How to contact Pitkin County: You may contact us to let us know of your changes as to how we may contact you electronically, to request paper copies of certain information from us, and to withdraw your prior consent to receive notices and disclosures electronically as follows: To contact us by email send messages to Helpdesk@provelocity.com To advise Pitkin County of your new e-mail address To let us know of a change in your e-mail address where we should send notices and disclosures electronically to you, you must send an email message to us at Helpdesk@provelocity.com and in the body of such request you must state: your previous e-mail address, your new e-mail address . In addition, you must notify DocuSign, Inc to arrange for your new email address to be reflected in your DocuSign account by following the process for changing e-mail in DocuSign. To request paper or electronic copies from Pitkin County To request delivery from us of paper or electronic copies of the notices and disclosures previously provided by us to you electronically, you should request those documents from Pitkin County under the Colorado Open Records Act by contacting the Pitkin County custodian who sent you the document for signature. To withdraw your consent with Pitkin County To inform us that you no longer want to receive future notices and disclosures in electronic format you may: i. decline to sign a document from within your DocuSign account, and on the subsequent page, select the check-box indicating you wish to withdraw your consent, or you may; ii. send us an e-mail to Helpdesk@provelocity.com and in the body of such a request, you must state your e-mail, full name, Postal Address, telephone number, and account number.