Carroll County Water and Wastewater Services On-Call Services
Location Carroll County
Client Carroll County, Dept. of Public Works, Bureau of Utilities
Date of Completion 2018
George, Miles, & Buhr, LLC (GMB) was hired by the Carroll County Bureau of Utilities in 2014 to provide Task Oriented Water and Wastewater Engineering Services. To date, GMB has been assigned eleven (11) tasks under this Task-Oriented Contract including pumping station feasibility studies, sewer alignment studies, sewer design, water treatment plant upgrade designs, environmental studies, water tank inspections, construction phase services, stormwater management, and permitting. The following are examples of a few of these tasks for reference:
Task 1: Piney Run Pumping Station Feasibility Study: BMB prepared a feasibility study to evaluate alternative pump removal/replacement options for the Piney Run Pumping Station. The existing pumps are 250 horsepower, non-clog, submersible type pumps that are installed in a wet well with a pump removal hoist that traverses across the wet well on an I-beam. The current configuration provides minimal pump removal clearance between the I-beam and the top of the wet well wall. The County has experienced operational issues with the existing pumps and therefore they have requested that GMB investigate pump replacement options for future pump replacement. The feasibility study recommended structural modifications to the existing wet well walls and installation of a new 3-Ton hoist. The study also included cost estimates to assist the County with the development of their Capital Improvement Plan (CIP).
Task 2: Hampstead Interceptor Sewer Alignment Study: Flows from the Shiloh Pumping Station discharge to a gravity sewer which conveys the flow to the Hampstead WWTP Influent Pumping Station where it is re-pumped into the WWTP. The purpose of this interceptor alignment study is to determine if there is a viable option for re-routing the majority of the flow currently served by the Hampstead WWTP Influent Pumping Station to flow to the WWTP via gravity. Thus, minimizing the cost associated with re-pumping. The study included economic and non-economic considerations such as environmental, historical and permitting requirements as part of the evaluation process.
Task 3: Warfield Service Area Sewer Assessment: At the request of the Department of Economic Development, GMB was asked to investigate and evaluate the condition of a portion of an existing sanitary sewer system in the Warfield Service Area near Sykesville, Maryland. The purpose of our evaluation was to present the findings of the field investigation, identify any manholes or sewers with defects, identify any sewer segments with insufficient ground cover, calculate the capacity of each sewer segment, and develop recommendations for improvements along with cost estimates for repairs and/or replacement. Our investigations included manhole inspections, CCTV sewer inspections, and field survey of invert elevations at manholes.
Task 4: Hampstead Interceptor Sewer Design: Following up on the recommendation from the above Interceptor Sewer Alignment Study (Task 2 above), GMB has been retained by Carroll County to prepare Contract Documents for a new influent interceptor sewer that re-routes flow from the Town of Hampstead directly to the new influent screening facilities at the wastewater treatment plant via a gravity interceptor. GMB is responsible for coordinating the topographic survey, geotechnical investigations and engineering report, preparation of necessary easement plats, wetland delineation and permitting, erosion and sediment control and SHA approvals. Projects consists of approximately 5,600 linear feet of 12 and 15-inch diameter interceptor sewers, two (2) jack and bore SHA roadway crossings and coordination with the wastewater treatment plant construction project.
Task 5: Piney Run & Deep Run Fish Count: Responsible for the development of a fish count survey within a segment of Piney Run that extends from the Hampstead Wastewater Treatment Plant (WWTP) outfall downstream to the County property line (approximately 600 linear feet) and a section of Deep Run downstream of the proposed outfall. The fish count survey was conducted in accordance with the requirements listed in the Maryland Biological Stream Survey (MBSS) methodology.