Harford County Water & Wastewater Projects Open-End Contract
Location Harford County, MD
Client Harford Count DPW, Division of Water & Sewer
Date of Completion Ongoing
Task 1 – Bear Cabin Branch Infiltration & Inflow Study: As part of our Open-End Contract with Harford County, GMB has been engaged to prepare an Infiltration and Inflow (I&I) study of the collection system draining to the Bear Cabin Branch Sewage Pumping Station located in Bel Air. The project included CCTV inspection of approximately 13,000 linear feet of 8-inch to 16-inch diameter sanitary sewer pipes and 65 manhole inspections.
The purpose of the inspections is to look for sources of groundwater infiltration and/or rainfall-dependent infiltration & inflow (RDII), as well as for the County to gain a general understanding of the condition of the sanitary sewer system in this drainage area. Manhole inspections followed NASSCO Manhole Assessment Certification Program (MACP) guidelines and pipe inspections followed NASSCO Pipeline Assessment Certification Program (PACP) guidelines.
Task 2 – Glenwood Sewer Petition Construction Cost Estimate: GMB was retained under our Open-End Contract to provide Harford County with a preliminary construction cost estimate for the Glenwood Sewer Petition Project. Our preliminary construction cost estimate was used by the County and homeowners to determine if the project should proceed from the preliminary planning phase to design and preparation of Contract Document.
Task 3 – Magnolia Road Sewage Petition Project: GMB is responsible for the planning, design, bidding, and construction administration of the Magnolia Road sewer petition project. Scope of the project includes the design and preparation of contract documents (drawings and specifications) including topography survey, easement plat preparation, and obtaining all necessary permits for the construction of approximately 1,800 linear feet of 8- inch gravity sanitary sewer and the required appurtenances to serve sixteen (16) properties along the 600 block of Magnolia Road.
Task 4 – Sanitary Pump Stations Bar Screen / Grinder Study: GMB was retained by Harford County through our Open-End Contract to prepare a study to evaluate the need and feasibility for automated rag removal or installation of grinding equipment at various sanitary pumping stations within the County sanitary sewer collection system network. Our study will develop a report that will analyze the as-built conditions of and issues at each pumping station. The final report will also make recommendations regarding possible modifications at each pumping station to alleviate current maintenance issues. We will provide the County with conceptual drawings showing the proposed modifications at each pumping station along with preliminary construction cost estimates.