Ribway Projects.
Ribway Engineering Group, Inc.
The City of Columbus Division of Water selected REG to provide
professional design services for the replacement of approximately 6,300
linear feet of water main varying in size from 6” to 12” and the transfer of
existing services from approximately 2,500 linear feet of existing 2” water
mains and 7,600 linear feet of existing 6” water main to existing 16” and 12”
water mains, respectively.REG prepared detailed plans and specifications
for the project. The drawings included plan and profile drawings for the water
lines, maintenance of traffic plans, a summary of quantities and
miscellaneous details.The project involved abandoning existing mains and
services; constructing new water lines; transferring and reconnecting
existing services, providing new valves and hydrants, relocating utilities and
replacing existing pavement. Selection of the water line alignment was a
critical part of the project. The alignment was chosen to avoid existing
utilities and minimize disruption to residences and business communities.
REG worked with numerous utilities and agencies during the design phase
of the project.
City of Columbus, Ohio
Southerly WWTP Sludge Thickening Improvement Project
Southerly WWTP Sludge Thickening Improvement Project
City of Columbus, Ohio
Cleveland Ave. Area Water Main Improvements
Cleveland Ave. Area Water Main Improvements
REG was selected by the City of Columbus, Ohio as part of a consulting
team to provide process and electrical engineering design services for this
new $63 Million Dollar sludge thickening facility. The construction of the
new facility was necessary to replace the existing sludge thickening facility
which is not adequate to handle anticipated future demands.
The electrical power system was designed to feed (4) 500 HP and (1) 300 HP Centrifuges with VFD motor controllers; interior and exterior lighting; several sludge feed pumps; and a PLC control system. The primary system included a new 4,000 KVA dual unit substation and (2) 5,000 AMP motor control centers. The main feed to the North Incinerator Building was also replaced with a new larger 2,000 KVA dual ended Substation. Electrical power was obtained from plant's 14.4 KV switching station.
One challenging design aspect of the project was to maintain power feed to the existing sludge thickening equipment while the new equipment is being constructed. This challenge required a detailed construction schedule and provision of temporary power. Design for the facility was completed in August 2009. Construction began in November 2009 and the facility is anticipated to be in operation by December 2011.
The electrical power system was designed to feed (4) 500 HP and (1) 300 HP Centrifuges with VFD motor controllers; interior and exterior lighting; several sludge feed pumps; and a PLC control system. The primary system included a new 4,000 KVA dual unit substation and (2) 5,000 AMP motor control centers. The main feed to the North Incinerator Building was also replaced with a new larger 2,000 KVA dual ended Substation. Electrical power was obtained from plant's 14.4 KV switching station.
One challenging design aspect of the project was to maintain power feed to the existing sludge thickening equipment while the new equipment is being constructed. This challenge required a detailed construction schedule and provision of temporary power. Design for the facility was completed in August 2009. Construction began in November 2009 and the facility is anticipated to be in operation by December 2011.
REG was responsible for preparing a design report and detailed
construction plans and specifications to improve the poor drainage
conditions in this area. The design report summarized results of the
detailed analyses and evaluation of several alternatives to adequately
convey runoff from the 332-acre tributary area. The SCS TR-55 method was
utilized for hydrologic computations and the U.S. Army Corps of Engineers
HEC-2 model was utilized for hydraulic computations.
Recommended improvements consisted of approximately 6,000 lf of roadside ditches; 2,000 lf of 12 through 48 inch culverts; and significant amounts of roadway, driveway and shoulder replacement. Ditches ranged in width from 2 to 6 ft. and depth from 2 to 8 ft. Cross-sections consisted of concrete and earth bottoms with grassed side slopes. Twin 48 inch diameter circular and 38 x 60 inch elliptical culverts were utilized critical locations to address headroom and space issues. These locations included two (2) railroad crossings and the Sherwin Williams Paint Manufacturing Complex truck entrances.Construction drawings also included relocation of approximately 1,000 lf of security fencing and electric gates at the Sherwin Williams Complex; relocation of 1,500 lf of overhead lines and power poles owned by the City of Columbus MELP; and easement documents for ten (10) properties.Design of the project was completed in January 2002. Construction was completed in December 2002.
Recommended improvements consisted of approximately 6,000 lf of roadside ditches; 2,000 lf of 12 through 48 inch culverts; and significant amounts of roadway, driveway and shoulder replacement. Ditches ranged in width from 2 to 6 ft. and depth from 2 to 8 ft. Cross-sections consisted of concrete and earth bottoms with grassed side slopes. Twin 48 inch diameter circular and 38 x 60 inch elliptical culverts were utilized critical locations to address headroom and space issues. These locations included two (2) railroad crossings and the Sherwin Williams Paint Manufacturing Complex truck entrances.Construction drawings also included relocation of approximately 1,000 lf of security fencing and electric gates at the Sherwin Williams Complex; relocation of 1,500 lf of overhead lines and power poles owned by the City of Columbus MELP; and easement documents for ten (10) properties.Design of the project was completed in January 2002. Construction was completed in December 2002.
City of Columbus, Ohio
Watkins Road and New World Drive Drainage Improvements
Watkins Road and New World Drive Drainage Improvements
Butler County Department of Environmental Services (BCDES) was
experiencing significant maintenance problems with the relatively aged
submersible type North Sands Lift Station. Problems included frequent
breakdowns and clogging and inadequate pumping capacity. In March
2004, BCDES retained REG to provide design professional engineering
services for total rehabilitation of the station. REG’s design included
reconstruction of the submersible wet well; replacement of the valve vault,
pumps, valving, and piping; construction of approximately 1,200 ft of new
forcemain; and replacement of all the electrical controls. The station was
also designed to be powered by a portable generator.
The upgraded capacity of the renovated pump station is approximately 0.5 mgd. The proposed force main material is ductile iton or PVC. Several options for installing the force main were investigated including directional drilling, pipe bursting and open cutting. Open cutting was selected for cost and safety reasons.
The upgraded capacity of the renovated pump station is approximately 0.5 mgd. The proposed force main material is ductile iton or PVC. Several options for installing the force main were investigated including directional drilling, pipe bursting and open cutting. Open cutting was selected for cost and safety reasons.
Butler County Dept. of Environmental Services, Hamilton, Ohio
Sands Avenue Lift Station and Force Main Improvements
Sands Avenue Lift Station and Force Main Improvements
City of Toledo, Ohio
Bay View WWTP Wet Weather Treatment Facilities Grit Removal Facility
Bay View WWTP Wet Weather Treatment Facilities Grit Removal Facility
The City of Columbus Division of Water selected REG to provide
professional design services for the replacement of approximately
6,300 linear feet of water main varying in size from 6” to 12” and the
transfer of existing services from approximately 2,500 linear feet of
existing 2” water mains and 7,600 linear feet of existing 6” water main
to existing 16” and 12” water mains, respectively.REG prepared
detailed plans and specifications for the project. The drawings
included plan and profile drawings for the water lines, maintenance of
traffic plans, a summary of quantities and miscellaneous details.The
project involved abandoning existing mains and services; constructing
new water lines; transferring and reconnecting existing services,
providing new valves and hydrants, relocating utilities and replacing
existing pavement. Selection of the water line alignment was a critical
part of the project. The alignment was chosen to avoid existing
utilities and minimize disruption to residences and business
communities. REG worked with numerous utilities and agencies
during the design phase of the project.
Butler County Dept. of Environmental Services, Hamilton, Ohio
Shaker Creek Relief Sewer
Shaker Creek Relief Sewer
REG was selected to provide professional design engineering and
planning services for this project involving the construction of
approximately 6,000 linear feet of new 27 inch diameter sanitary
relief sewer including manholes along State Route 63 in Monroe,
Ohio. The objective of the project was to eliminate flooding in the
project area and provide capacity for future development.
Design of the project involved researching existing utilities, evaluating alternative alignments, estimating design flows, sizing the sewer, preparing construction plans, preparing easement documents, and coordinating with several municipalities, agencies and townships including Lebanon Correctional Institute, the City of Monroe, Butler County and Ohio EPA.
Challenges encountered during design included obtaining an easement from the State of Ohio, because the sewer was constructed on prison grounds (Lebanon Correctional Facility), verifying buried water lines in the area, because existing records were unavailable, and forecasting future flows for the sewer, because of the vast amount of undeveloped area that the sewer served.
Design of the project was completed in September 2008. Construction of the project was completed in June 2009. Construction included tie-ins to existing structures, a creek crossing and relocation of the sewer near high pressure gas lines. The proposed sewer pipe material was corrugated PVC. HDPE pipe material with butt-fused joints was utilized in areas close to the high pressure gas lines.
Design of the project involved researching existing utilities, evaluating alternative alignments, estimating design flows, sizing the sewer, preparing construction plans, preparing easement documents, and coordinating with several municipalities, agencies and townships including Lebanon Correctional Institute, the City of Monroe, Butler County and Ohio EPA.
Challenges encountered during design included obtaining an easement from the State of Ohio, because the sewer was constructed on prison grounds (Lebanon Correctional Facility), verifying buried water lines in the area, because existing records were unavailable, and forecasting future flows for the sewer, because of the vast amount of undeveloped area that the sewer served.
Design of the project was completed in September 2008. Construction of the project was completed in June 2009. Construction included tie-ins to existing structures, a creek crossing and relocation of the sewer near high pressure gas lines. The proposed sewer pipe material was corrugated PVC. HDPE pipe material with butt-fused joints was utilized in areas close to the high pressure gas lines.
Metropolitan Sewer District of Greater Cincinnati, Ohio
Mill Creek WWTP Preliminary (Grit) and Primary Treatment Improvements
Mill Creek WWTP Preliminary (Grit) and Primary Treatment Improvements
REG was the prime consultant selected to provide design and construction
administration services for this project involving the rehabilitation of a 1,900
ft. section of 42-inch diameter concrete aerial sewer with seven manholes
and approximately 40 supporting concrete piers. The existing sewer was
leaking at its joints. In addition, the exterior pipe surfaces and a significant
number of the piers were deteriorating. Pier deficiencies included spalls,
honeycombs, and delaminations.
The design report phase of the project included performing an assessment of the sewer and piers to identify defects and determine the extent of deterioration; evaluating several alternatives for rehabilitation along with associated costs; and recommending the most feasible alternative.
The pipe rehabilitation alternatives included slip lining, joint sealing and cured-in-place pipe lining. Slip lining was recommended because of its lower cost, longer service life, safer construction method and lesser impact on the nearby residential neighborhood. The rehabilitation method selected for manhole repair was cementitious grout lining. A cement based patching mortar and water based exterior coating were recommended materials for restoration of the concrete piers. The project engineer was Mr. Andrew Eribo. Detailed construction documents were completed in February 2003. They included plan and profile drawings, manhole rehabilitation details, pier restoration details, and maintenance of traffic plans. REG also prepared plats and legal descriptions for several easements. Construction was completed in August 2004.
The design report phase of the project included performing an assessment of the sewer and piers to identify defects and determine the extent of deterioration; evaluating several alternatives for rehabilitation along with associated costs; and recommending the most feasible alternative.
The pipe rehabilitation alternatives included slip lining, joint sealing and cured-in-place pipe lining. Slip lining was recommended because of its lower cost, longer service life, safer construction method and lesser impact on the nearby residential neighborhood. The rehabilitation method selected for manhole repair was cementitious grout lining. A cement based patching mortar and water based exterior coating were recommended materials for restoration of the concrete piers. The project engineer was Mr. Andrew Eribo. Detailed construction documents were completed in February 2003. They included plan and profile drawings, manhole rehabilitation details, pier restoration details, and maintenance of traffic plans. REG also prepared plats and legal descriptions for several easements. Construction was completed in August 2004.
City of Columbus, Ohio
Upper Scioto Area East Branch Sewer, Case Road to Martin Road Rehab
Upper Scioto Area East Branch Sewer, Case Road to Martin Road Rehab
REG was selected by MSD of Greater Cincinnati as the prime
consultant for engineering design and construction management
services for preliminary and primary treatment improvements at its Mill
Creek WWTP. The construction of the facility was mandated by the
Ohio EPA as part of a consent decree and is estimated at $30 Million
Dollars. The project includes improvements to the existing raw sewage
pumping facilities; replacement of the existing detritor grit removal
facilities with new vortex type grit removal and unloading facilities
designed for 430 mgd; total rehabilitation of the primary treatment
system also rated for 430 mgd; and new odor control, sampling and
metering facilities. The Grit Removal Facility (GRF) will consist of six (6)
90 mgd capacity vortex type grit tanks; six (6) grit washers; twelve (12)
grit transfer pumps; a 15,000 sf grit tank building; a 7,600 sf grit
container building; a 400 sf electrical building with 5,000 Amp
Switchgear and 3,750 KVA dual unit substation; and an Odor Control
System consisting of three (3) 12,000 cfm fans with 25 ft tall carbon
adsorption towers. A green roof will be incorporated in the grit tank
building structure.
The Primary Treatment System (PRS) improvements will consist of concrete tank repairs, new sludge and skimmings collection equipment (8 tanks), new skimmings pumping equipment (2 pump stations) and new skimming thickening equipment (2 tanks). Other improvements include two (2) new 84-inch magnetic flow meters for raw sewage metering, a new 150 sf building to house raw sewage sampling equipment, and 5,000 lf of pre-stressed concrete mains ranging in size from 84 for 102 inches in diameter. The GRF is designed to remove screenings and heavier inorganic material ahead of downstream processes. De-watered grit from the GRF and dewatered skimmings from the PRT will be transferred to roll-off containers and hauled to the landfill for final disposal. The facility will be fully automated and controlled through a PLC System. Design of the project was completed in November 2009. Construction is anticipated to be complete in June 2011.
The Primary Treatment System (PRS) improvements will consist of concrete tank repairs, new sludge and skimmings collection equipment (8 tanks), new skimmings pumping equipment (2 pump stations) and new skimming thickening equipment (2 tanks). Other improvements include two (2) new 84-inch magnetic flow meters for raw sewage metering, a new 150 sf building to house raw sewage sampling equipment, and 5,000 lf of pre-stressed concrete mains ranging in size from 84 for 102 inches in diameter. The GRF is designed to remove screenings and heavier inorganic material ahead of downstream processes. De-watered grit from the GRF and dewatered skimmings from the PRT will be transferred to roll-off containers and hauled to the landfill for final disposal. The facility will be fully automated and controlled through a PLC System. Design of the project was completed in November 2009. Construction is anticipated to be complete in June 2011.