Change Order No 1 - Small Drainage & Design Repair - Sampson & Overlook Proj No. 118-063 - HRP Construction, Inc.

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and grubbing, concrete, mulched seeding, etc. with several underruns that include excavation, sodding, topsoil, etc. A full list of the items with quantity over and underruns is provided in the attachments (less than $44,000) We do want to memorialize that the majority of the items under the storm sewer portion of the change order would have been required as part of the project and agree that these items should not have been missed by the Consultant, surveyor, or the engineering team. The engineering team relies and expects our professional service representatives to thoroughly quality control and assure the design and data from their work is accurate to the best of their ability. With respect to the sanitary sewer, this was unexpected. After redesign of this storm sewer multiple times over the past 2 years, the design proposed appeared to be our best option with the highest capacity and capture of runoff from the neighborhood bordering Sampson. The current installation has performed well with the utilization of the existing basin south of the Overlook Court cul-de-sac and was designed with increased storm capacity and cost considerations in mind. The newly installed stormwater collection system has prevented the drainage issue from impacting residents at the east end of Overlook Court during the storms incurred this summer. Large storm events exceeding the capacity of our storm sewers may yield overflows to the existing ditch northwest of Overlook Court, but the smaller and regular storm events are now being captured. The design concept for capturing the storm runoff to this subdivision is something that should have been designed and implemented as part of the development of the subdivision on Overlook Court. The relocation of the sanitary sewer allowed for this maximized solution to be implemented and has an added benefit of providing access to the sanitary sewer for inspections. Cost savings was provided by teaming up with our Streets Department to mill and install the surface asphalt layer on Sampson as well as down Overlook Court. The developer failed to install the surface asphalt on Overlook Court. If you have any questions on this change order, please feel free to reach out. Thank you. \\\\COSB-FS1\\Share\\Public Works\\Projects\\Projects by Year\\2018 Projects\\118-063 Small Drainage Design and Repair\\PROCUREMENT\\AGENDA REQUESTS\\Memo to BPW - Sampson and Overlook Change Order Background.doc