Environmental Services Design Report - Vand i Byer

BudgetThe total budget for the project was $822,000. The fully-loaded cost of construction was $523,000.Construction*Work ByStreet Sump (2005) $18,000 City CrewsCurb Extension (2007) $11,000 City CrewsRain garden (2006) $168,000 ContractorParking lot swale, planters, drywells (2007) $326,000 ContractorTotal $523,000* Includes approximately $117,000 in charges by the City for associated construction-phase tasks: contractmanagement, project management and engineering, construction management and inspection, survey, utilitylocates, materials testing, and public involvement.The total cost for pre-design and design activities was $257,000, or 49% of construction costs.Activities included initial site survey, soil and infiltration tests, an environmental assessment, locationof utilities, evaluation of site alternatives, development of conceptual plans and construction plans,coordination with the school district, and obtaining permits.The charges for planting the vegetated infiltration facilities totaled $38,000. The work was done byPortland Parks and Recreation.The alternative to retrofitting the school was to replace six sections of combined sewer pipe on SEPine and SE 55th Street. The estimated cost for that alternative was more than $1,300,000 (2007).Ownership and MaintenancePortland Public Schools owns the facilities on the schoolproperty. The street curb extension and associated sumpsystem are owned by the City of Portland.BES currently shares maintenance responsibilities for theschool facilities with PPS. The school district hasresponsibility for maintaining the pipe infrastructure, includingthe drywells, and custodial staff removes garbage and debrisas part of their daily rounds. BES will provide landscapemaintenance services for the stormwater-related landscapeareas through 2017. BES’ commitment reflects the fact thatthe project is a test case in a number of respects, includingevaluation of maintenance requirements for large systems.BES maintenance crews plan to visit the site on a quarterlybasis. There is a total of 5,720 ft 2 of new planted landscape asa result of the project (approximately 1,000 ft 2 of the newlandscape was previously grassy and the rest was asphalt.)Watering will end as of August 2009, which is the end of thetwo-year “startup period” for the last components to beconstructed.Completing the concrete work for the curbextension. There are 8 flat-bottomedcompartments separated by check dams.8