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Water Main Design - 2014
Sabra Wang & Associates, Inc. (SWA) was responsible for the design and construction document preparation for three miles of new water main design in the vicinity of Harford Avenue and East Federal Street in Baltimore Maryland. SWA prepared temporary water main bypass plans to allow continuation of service during water main replacement utilizing the City’s valve status map to determine which valves to shut off in order to isolate the replacement area and the bypass area. Water main replacement, needed due to the advanced age of the undersized pipes could often be accomplished in the same location horizontally and vertically as the original pipes but often required parallel relocation to meet minimum clearance requirements. SWA quantified the pipe material, connections, fittings, valves, hydrants, house connections, house connection upgrades and associated pavement repairs. SWA incorporated standard City Water Supply and Bypass Details and modified the standard City Specifications to meet project specifics.
SWA coordinated with AMTRAK (which has a train tunnel under the area) to determine property, right of way and adjacent construction issues and helped develop an agreement between AMTRAK and the City for the Water Main work to be completed.
East Baltimore DeveIopment (EBDI)
Infrastructure Improvements – 2013 & 2014
TR-07309 & TR 08313R
Sabra, Wang & Associates, Inc. (SWA) designed City Conduit system as follows:
Phase 1C – SWA created the design and construction contract documents for 850-linear feet 5-inch x 4-way and 4-inch x 4-way City Conduit Ductbank in Ashland Avenue, from North Broadway to Wolfe Street including connections to 4-City Conduit Electric Manholes and existing City Ductbank. The Project included relocation of four BGE Electric Poles in Alley A-21 with co-mounted overhead Electric and Telecommunication Cables, and replacement of existing Electrical Manhole (EMH) 110 in Ashland Ave and new EMH 110A in Alley A-21 to provide underground Electric Power and Telecommunication Services in 6-inch x 8-way and 4-inch x 4-way City Conduit Ductbanks, respectively, for the proposed 5-story Maryland Public Health Laboratory, and adjacent multi-story Parking Garage.
Phase 2A – SWA created the design and construction contract documents for 4,300-linear feet 3-inch City Streetlighting Conduit Ductbanks in East Chase, from North Broadway to Wolfe Street, and on McDonogh Street and Rutland Avenue from East Chase Street to East Biddle Street including 43-Streetlights and 56-Hand Boxes, and connections to existing City Conduit EMH and existing City Ductbank.
Phase 1D-B – SWA created the design and construction contract documents for 2- precast concrete City Conduit Electric Manholes, 345-LF 3-way x 3-inch + 6-way x 4-inch + 8-way x 5-inch, 50-LF 3-way x 3-inch + 4-way x 4-inch, 75-LF 6-way x 5-inch, 65-LF 2-way x 3-inch + 2-way x 5-inch, 15-LF 2-way x 3-inch + 6-way x 5-inch and 15-LF 2-way x 3-inch + 4-way x 5-inch concrete encased conduit City Ductbanks, 2,937-linear feet 3-inch City Streetlighting Conduit Ductbanks in McDonogh Street, Rutland Avenue and North Durham Street from Alleys A-12, A-13, A-14 and A-15 north to East Chase Street including 32-Streetlights and 26-Hand Boxes, and connections to existing City Conduit Electric Manholes (EMH) and existing City Ductbank.
Phase 2B – SWA created the design and construction documents for 1,500-linear feet of multiple 3-inch, 4-inch and 5-inch PVC conduit, concrete encased City conduit ductbanks connecting 4-new precast concrete and 5-new cast-in-place (CIP) concrete electrical manholes (EMHs), each 6-ft. x 12-feet x 8 to 10-feet deep, plus 5-conduit ductbank interties to the existing City Conduit system EMHs in Ashland Avenue. Two of the new CIP EMHs replaced existing EMHs. The conduit system design capacity was based on BGE Electric power cable and City Conduit spare capacity requirements to serve the new development and new East Baltimore Community (Elementary) School and Early Childhood Center.
The Conduit and ductbank designs required coordination with Forest City – New East Baltimore Partnership, EBDI and their Consultants, existing and proposed City Water Main, Sanitary Sewer and Storm Drain relocations, City DOT Conduit Section, BGE Gas and Electric Divisions, Comcast, the existing and new roadway, street lighting, telecomm designed by others, and separate Verizon conduit system, in accordance with City of Baltimore, and the Developer’s Agreement design requirements.
2014 - Bridge Supported Conduit and Ductbank Design Contract TR-00073,
Hawkins Point, Baltimore Maryland
Sabra, Wang & Associates, Inc. (SWA) designed new City conduit duct bank system and created contract documents and cost estimate for the reconstruction of Hawkins Point Road from Old Hawkins Point Road west of Chemical Road, and east over the replacement CSXT Railroad Bridge to Ross Avenue entrance to the U.S. Coast Guard Curtis Bay Shipyard. The City conduit duct bank design included 3,800 linear feet of multiple 3-inch, 4-inch and 6-inch PVC, concrete encased City conduit duct banks connecting to 8-precast concrete electrical manholes (EMHs) 6-feet x 12-feet x 9-feet head depth, and interties to BGE pad mounted electrical transformers and poles, plus 3-sets of aerial City conduit duct banks (one 6-way, 3 and 4-inch conduits, and two, 4-way, 6-inch conduits) in the new 155-linear foot, 3-span, skewed bridge over the CSXT Railroad right-of-way. The City conduit design required coordination with the roadway, bridge, storm drain system, street lighting and traffic signal designs, routing around a 48-inch and smaller water mains, gas mains, and Verizon of MD telephone conduit duct bank and telephone manholes.
Replace Utility on Fort Avenue Bridge Over CSXT Railroad, City of Baltimore, Maryland, Department of Transportation, Contract No. TR-11309 - 2012
City of Baltimore, MD
Sabra, Wang & Associates, Inc. (SWA) was responsible for the Utility Demolition and Relocation Design and Contract Documents for the phased demolition of the existing Bridge, and replacement with a 57-feet long x 82.5-feet wide, composite steel W27 Beam and concrete Deck, Single Span Bridge, with Semi-Integral Abutments. The Utility Demolition and Relocation Design included phased removal (aerial and buried) 180 linear feet of 10 inch CIP City Water Main (Abandoned), and phased removal and replacement with 145 linear feet of 20 inch DIP + Steel City Water Main (North), 131 linear feet of 20 inch DIP + Steel City Water Main (South), 134 linear feet of 2 inch Steel BGE Low Pressure Gas Main, 230 linear feet of 8-way x 4 inch PVC Conduit Verizon of MD Telephone Ductbank, 350 linear feet of 18-way x 5 inch + 2-way x 2 inch PVC Conduit City Electric Ductbank, and two, cast-in-place reinforced concrete, 12 feet long x 6 feet wide x 8 feet high (inside dimensions) City Electric Manholes. Each of the aerial 20 inch Steel Water Mains on the Bridge are supported on Casing Spacers inside a 24 inch Steel Casing Pipe, inside the reinforced concrete Parapet Boxes, outside the Sidewalks on the Bridge Deck. Each of the aerial 24 inch Steel Pipe Casings has welded steel Collar Plates on each end, with one Collar Plate supported and anchored to the reinforced concrete Parapet Box and Bridge Deck, and the free-end on Plate and Roll Pipe Supports. Each aerial 20 inch Steel Water Main has insulating Flanges at the DIP Flange connection, and an EBBA Iron Ex-Tend DIP Flanged Expansion Joint. Each of the four 20 inch DIP Water Main connections to the existing 20 inch CIP Water Mains, included Restrained Closure Sleeves tied to In-Line Reinforced Concrete Thrust Blocks. The phased demolition and replacement of the 20 inch DIP Water Main (North) required Temporary Water House Connections for three residences. The aerial 12 inch Steel BGE Gas Main is supported on Casing Spacers inside a 16 inch Steel Casing Pipe on Pipe Hanger Supports between the W27 Steel Bridge Beams under the Bridge Deck. The aerial 8-way x 4 inch PVC Conduit Verizon of MD Ductbank and the aerial 18-way x 5 inch + 2-way x 2 inch PVC Conduit City Electric Ductbank are supported on Conduit Hanger Supports between the W27 Steel Bridge Beams under the Bridge Deck. The buried Verizon of Maryland Ductbank and City Electric Ductbank are concrete encased from each Bridge Abutment Wall to their respective Manholes.
2014 - Preliminary Utility Engineering for AMTRAK’s
High-Speed Inter-City Passenger Rail Projects Maryland Statewide
Sabra, Wang & Associates, Inc. (SWA) was responsible for new utility ductbank design, underground and overhead utilities relocation and/or modification for the 6.2-mile x 1,000-ft. wide project area from Havre De Grace over a new Susquehanna River Bridge to Perryville. Task responsibilities included confirming all overhead and underground utility owners impacted by the proposed project area, obtaining all available utility record drawings in various digital and paper formats, converting all utility records to a retrievable digital format, file naming and archiving into a data management system using Microsoft Access, for subsequent access and incorporation into the Computer Aided Design files for the project and existing utility composite drawings. The existing utility composite was used to identify, categorize and analyze crossing and parallel utility conflicts with the proposed horizontal and vertical alignment options. The impacted utilities requiring relocation and/or modification include AMTRAK underground, Baltimore Gas and Electric overhead electric transmission, primary and secondary distribution, and gas mains, Delmarva Power overhead primary and secondary distribution; AT&T transmission underground, Atlantic Broadband overhead, CenturyLink underground, Comcast overhead, Fibertech underground, Level 3 Communications underground, Zayo overhead and underground, Eastern Shore Natural Gas Company gas mains, City of Harve de Grace, Town of Perryville, Harford and Cecil Counties water mains and sanitary sewers.
Dulles Corridor Metrorail Project
Utility Relocation and Protection Design - Ongoing
Washington Metropolitan Airports Authority (WMAA)
Fairfax and Herndon Counties, Virginia
Sabra, Wang & Associates (SWA) performed Utility Relocation Designs at Dulles International Airport (DIA) in Fairfax and Herndon Counties, Virginia in support of the Dulles Corridor Metrorail Project. SWA, working as a Sub-Contractor to Capitol Rail Constructors Joint Venture (JV) with Kiewit Corporation and Clark Construction Group provided underground utility relocation for the extension of the elevated WMATA Silver Line Phase II within DIA. SWA’s responsibilities included design, contract drawings and specifications for the relocation of telecommunication duct banks and gas mains in accordance with WMAA DIA design requirements for the construction of the foundations and support piers for the elevated track structure. SWA responded rapidly to changed field conditions.
SWA was responsible for the analyses and design of utility protection structures for existing drainage structures, pipes, utilities, and box culverts that could be affected by the construction activities and finished project. The existing utility crossings involve thirty crossings, which include nineteen crossings located at the East Segment and eleven crossings located at the West Segment. Within the thirty crossings, ten crossings require the design of a protection structure to protect the utility.
Baltimore Bridge Inspection Services – 2012 to 2015
Baltimore City and Baltimore County, Maryland
Sabra, Wang & Associates, Inc. (SWA) provided bridge condition inspection and engineering services for Bridges in both Baltimore City and Baltimore County under this contract. The work included coordination with vendors providing access equipment and traffic control measures (including acquiring Baltimore City Traffic Office permits) “hands-on” inspection of all accessible structural elements on the subject bridge spans that cross over stream, roadway, railroad, trail and etc. SWA performed inspections and prepared reports, re- inspected bridges as interim annual inspections, performed Engineering and evaluation services for Load Rating for Three Span, Steel Beam/Concrete Deck Bridges and Load Rating for Three Span, Concrete Box Beam Bridges. SWA also coordinated with a supplier to schedule the use of a boat to acquire soundings at several locations that could not be done otherwise.
All inspections were conducted in accordance with Publication FHWA NHI 03-001, Bridge Inspector’s Reference Manual and AASHTO Manual for Condition Evaluation of Bridges. During the inspection, field notes, measurements and (digital) photographs of found defects were obtained. SWA inspection personnel gained access to bridge elements with snooper, bucket truck, Maintenance of Traffic and lighting equipment.
SWA utilized Inspecttech software to prepare inspection reports that include description of the bridge, the inspection findings and recommendations of repair actions, comparison of current inspection findings and those noted in the previous inspection report, color photographs of all noted significant defects along with six standard photographs (both bridge elevations views, the approach views as positioned at the each end of the bridge and both approach roadways as positioned on the bridge deck), field inspection notes and sketches of found defects, SI&A input sheets in each of the Inspection Reports with a copy of the input sheets showing the changes highlighted, updated Pontis element data and condition ratings reports, and Sounding Sheet and Baseline Soundings (if applicable).
2014 - Central Avenue Utility Design Services
for Phase 2 Reconstruction and Harbor Point Connector Bridge - Contract TR 12317
Sabra, Wang & Associates, Inc. (SWA) assisted in the preparation of Design / Build Contract Documents (Preliminary Plans, Performance Specifications, Special Provisions and Estimate) for 8,500-linear feet of multiple three, four and five inch PVC conduit, concrete encased conduit ductbanks connecting to 16 cast-in-place (CIP) concrete replacement electrical manholes (EMHs), three new CIP concrete EMHs, five CIP concrete replacement EMH roof slabs, each 6-ft. x 12-ft. x 8 to 10-ft. deep. The connections were made to Phase 1 Reconstruction of Central Avenue from East Baltimore Street to Madison Street, the Harbor Point Connector Bridge and the existing City Conduit system. The preliminary design included seven tunneled conduit ductbank crossings under the existing 19-foot wide x 10-foot deep pile supported storm drain based on single and multiple 36 inch steel casings, and sheeted and shored entry and exit shafts. Coordination with Veolia Energy hot/chilled water mains, BGE Gas and Electric Divisions, Verizon, Comcast and other telecomm, City utilities (i.e., water mains, sanitary sewers and storm drains) and proposed Maryland Transit Authority (MTA) Red Line Light Rail tunnel and station at Fleet Street was required.
SWA performed utility design services for the reconstruction of Central Avenue from Lancaster Street to East Baltimore Street City to prepare Conduit system Design-Build Contract Documents (Preliminary Plans, Performance Specifications, Special Provisions and Estimate) for 8,500-linear feet of multiple 3-in., 4-in. and 5-in. PVC conduit, concrete encased City conduit ductbanks connecting to 16-cast-in-place (CIP) concrete replacement electrical manholes (EMHs), 3-new CIP concrete EMHs, 5-CIP concrete replacement EMH roof slabs, each 6-ft. x 12-ft. x 8 to 10-ft. deep, plus Conduit ductbank interties to Phase 1 reconstruction of Central Avenue from East Baltimore Street to Madison Street under Contract TR-03310, the Harbor Point Connector Bridge and the existing City Conduit system. The preliminary design included 7-tunneled conduit ductbank crossings under the existing 19-ft. wide x 10-ft. deep pile supported storm drain based on single and multiple 36-in. steel casings, and sheeted and shored entry and exit shafts, and coordination with Veolia Energy hot/chilled water mains, BGE Gas and Electric Divisions, Verizon, Comcast and other telecomm, City utilities (water mains, sanitary sewers and storm drains) and proposed Maryland Transit Authority (MTA) Red Line Light Rail tunnel and station at Fleet Street.
Ongoing - Maryland 355 (Rockville Pike) and WMATA Medical Center METRO Station Utility Modifications (BRAC) - Contract 850450010
Montgomery County, MD
Sabra, Wang & Associates, Inc. (SWA) was responsible for developing the complex Utility Relocations associated with a proposed Pedestrian and Bicycle Underpass, the addition of Deep Elevators, a Transportation System Management (TSM) / Transportation Demand Management (TDM), and an altenate Grade Separation of MD 355 under South Wood Road (NMMC)/South Drive (NIH). The impacted Utilities included PEPCO (Electrical Conduit Ductbank and Manholes, and Overhead Power Lines for 110kV Transmission, Primary and Secondary Distribution, and Streetlighting, with co-mounted Comcast Cables), Verizon of Maryland (Telephone Conduit Ductbank and Manholes, Overhead Telephone Lines, and direct buried (formerly MCI) Fiber-Optic Cables), Washington Gas Mains, Washington Suburban Sanitary Commission Water Mains and Sanitary Sewers, and WMATA Private Sanitary Sewers. The development of conflict resolutions and new services required coordination with all stakeholders as well as the utility companies. SWA is responsible for the performance specification and other documents needed for the project to be advertised for a winning Design/Build Team. SWA will provide construction support services.
The MD 355 Crossing (BRAC) project is located in Bethesda, Maryland, a densely populated and developed area inside the Capital Beltway (I-495), and adjacent to the National Institutes of Health (NIH) and Naval Support Activity-Bethesda (NSAB), which is home to the Walter Reed National Military Medical Center (WRNMMC). The focus of the project is on the intersection of MD 355/Rockville Pike and South Wood Road/South Drive. The purpose of the project is to improve the movement of the traveling public between the west and east sides of MD 355/Rockville Pike at its intersection with South Wood Road and South Drive in Bethesda. The project includes a proposed shallow underpass below MD 355, new deep high-speed elevators and emergency stairs on the NAVY side, and a new deep tunnel connection between the new deep high speed elevator and the existing Metrorail tunnel.
Dundalk Avenue Ductback Design From Eastern Avenue to City Line – Utilities - 2014
BC TR 035308
Sabra, Wang & Associates, Inc. (SWA) was responsible for the design and contract document preparation for the new City ductbank (5-Way x 5 inch diameter concrete encased conduits), parallel to the existing City ductbank (15-Way x 5 inch diameter concrete encased conduits) along Dundalk Avenue to support a streetscape improvements project. The new ductbank was required by the City to provide additional capacity for Baltimore Gas and Electric Company (BGE Electric), who leases the City ductbank.
The new City ductbank design included a unique thermal-break for its entire length, except at Electrical Manholes (EMHs), to meet BGE electrical requirements to minimize overheating of the existing 33kV cables in the existing City ductbank.
The new City ductbank required the modification of eight existing EMHs, demolition and cast-in-place concrete replacement of 12 new EMHs (6-feet wide x 12-feet long x 8-feet head room inside dimension), eight new EMHs (6-feet wide x 12-feet long x 8-feet head room inside dimension), a 24-inch diameter x 65-linear feet steel casing tunneled under the single track Canton RR crossing, including jacking and receiving pits and appurtenances.
The design required in excess of 60 test pits to confirm with the existing City ductbank vertical position, due to the lack of as-built/record drawings, and the numerous crossing and overlapping parallel existing utilities as well as to resolve conflicts in the numerous existing utilities as-built/record drawings.
Uplands Electrical Conduit, Water Main and Sewer Main Design - 2013
Contract No. 24.00-1489-14111
Sabra, Wang & Associates, Inc. (SWA) is providing engineering services for the planning and design of the water mains, sanitary sewers, street lighting and electric conduit systems for the 100-acre Uplands Redevelopment site in west Baltimore. This mixed-use redevelopment project is partially funded by the City of Baltimore and is part of the City’s Urban Renewal Area Plan.
SWA was responsible for the planning and design of over 11,000 linear feet of gravity sewer main, 12,000 linear feet of water mains, and 22,000 linear feet of electrical conduits including 12,800-linear feet of multiple 3-in., 4-in. and 5-in. PVC conduit, concrete encased City conduit ductbanks connecting to 43-precast concrete electrical manholes (EMHs), each 6-ft. x 12-ft. x 8 to 10-ft. deep, plus 5-Conduit ductbank interties to the existing Area ‘B’ City Conduit system and prepared Contract Documents (Plans, Specifications and Estimate). The conduit system design capacity is based on BGE Electric power cable routing and transformer locations, Comcast telecomm cable routing and pedestal locations, and City Conduit spare capacity requirements to serve the new single and multi-family residential development, and required design coordination with the new residential units, roadway, water and gas mains, storm drains, and separate Verizon conduit system designed by others.
The completed development will consist of multi-family rental units, duplexes, townhouses, single family detached units and triplexes totaling over 460 units, as well as approx. 15,000 sf of office / retail and 5,000 sf of restaurant space.
Rehabilitation and Replacement of Deteriorated or Undersized Electrical Manholes Citywide - Ongoing
Sabra, Wang & Associates, Inc. (SWA) assisted Baltimore City Managers with the creation of a matrix structural evaluation of Conduit system Electrical Manholes (EMHs), based on previous EMH occupancy inspections, photographs, and conduit maintenance requests. The matrix structural evaluation established priority EMHs for comprehensive internal structural inspection, and evaluation to determine required repairs or replacement of the EMHs including estimated costs and feasibility of repair. SWA inspected EMH's for structural and safety issues as well as capacity to appropriately contain the conduits currently in the EMH and planned for the future. SWA provided Engineering Services to design the rehabilitation and replacement of deteriorated or undersized Electrical Manholes at various locations throughout the City of Baltimore. SWA Prepared Conduit Manhole Reconstruction Plans at Various Locations for a Job Order Contract (JOC) Contractor. Developing Plans and Specifications o Rebuild Deteriorated Manholes.
SWA evaluated feasible options to resolve the City Conduit system construction damaged disconnect under the Norfolk-Southern Railroad Right-of-Way (N-S RR ROW), City conduit system on north side of Eastern Avenue Underpass, and inaccessible City Conduit system electrical manholes (EMHs) on south side of Eastern Avenue Underpass. Designed 1,229-LF, 12-5-in. conduit duct bank and EMHs under eastbound traffic lane of Eastern Avenue Underpass from Haven to Lehigh Street intersections and reconnection to City Conduit system.