Principal Items of work for this contract include, but not limited to, construction services for routine maintenance and repairs of environmental restoration projects and stormwater management best management practices including existing natural stream channel restoration projects, outfall repairs, stormwater management ponds, environmental site design, and emergency repairs of storm drains and ancillary sewer and waterline repair. On/Call services may include but may not be limited to excavating, grading, site work, as-built survey, repair, trash, and debris removal, installation of sediment and erosion control measures, landscaping, wetlands, seeding, invasive vegetation management, and other work as required.