Archive for category: Governmental Agencies (Page 8)

MCDOT – Plymouth Street Improvement District

Mesa, Arizona – DBA’s scope of work included:

• Over-excavation and hauling of existing pavement in some areas
• Clearing & grubbing
• Grading and compaction
• Placement of ABC (6” thick)
• Roadway asphaltic concrete paving using a Superpave material (approximately 10,000 SY)
• Placement of rip-rap along the roadway shoulders to prevent erosion and enhance drainage during rain events
• Adjustments to water valve boxes and water meter boxe
• Relocation of some saguaro cacti, mailboxes, and existing lighting poles.

The project consisted of improvements to Plymouth Street from 78th to 80th Streets; 78th Street from Palm Lane to Plymouth; 79th Street from Plymouth to the cul-de-sac; 80th Street from Plymouth to Quenton Street; and Quenton Street from 80th Street to 80th Place.  The project was located in an upscale housing development of East Mesa with large parcels and a very active neighborhood association.  Careful consideration of working alongside and within private driveways and constant communication with the landowners and utility companies (Cox Communications, SRP, CenturyLink and the City’s water, sewer and gas departments) was extremely important.  Some utility relocations were also required as part of this project.

Maricopa – Honeycutt Roadway & Bridge Repairs

Maricopa, Arizona – The project was to build a replacement of an at-grade water crossing by constructing a new 300’ long, 5-span concrete bridge over the Santa Rosa Wash in the City of Maricopa, Arizona.  The final bridge configuration was for four lanes with concrete sidewalks on both sides.
DBA’s project scope of work included:

• Extensive earthmoving operations including grading & drainage
• Removal of existing asphalt pavement
• Construction of a temporary asphalt-paved detour to maintain heavy traffic flow during bridge construction
• Construction of the 5-span, voided slab, girder bridge
• Construction of the roadway in both directions for 1/2 mile (totalling one mile of roadway construction) approaching the bridge
• Placement of gabion baskets along the abutments in the wash to prevent scour
• Installation of light poles and concrete light pole foundations
• Construction of concrete sidewalks, and curb & gutters
• Placement of guardrail and concrete barriers
• Replacement of an existing manhole
• Relocation of a 10” waterline from the river bottom to along the underside of the new bridge structure

The bridge structure required multiple drilled shafts, caisson pouring, rebar placement, traffic control, surveying and construction staking, electrical improvements, and striping as part of our subcontract plan.

MCDOT – Dysart Road Improvements & Bridge Widening

Maricopa County, Arizona – The project included:

• Demolition of the existing bridge’s edges
• Complete widening construction of the bridge on both sides
• Concrete barriers and TRACC TL-3 Attenuating Crash Cushions at the barrier ends
• 4’ high chain link fencing
• Concrete drainage spillways
• Sidewalks
• Curb & gutter
• 2.5’ diameter drilled shafts with concrete caissons for the bridge’s substructure

Construction of the bridge approaches included roadway reconstruction and paving including subgrade preparation, placement of aggregate base course, and PCC paving.

Working together with the Maricopa County Department of Transportation and the local businesses to maintain access during construction, DBA presented a plan suggesting closing both shoulders and slow lanes at the same time.  This allowed the team to work during the day and shortened the project’s duration while saving on traffic control costs.

ADOT – Quiet Pavement Program (Phases 1, 3, 5, 7)

Arizona Department of Transportation, Various Freeways, Arizona – In an effort to reduce highway noise affecting adjacent homeowners and businesses, ADOT began researching and analyzing the effects of including asphalt rubber friction course (ARFC) on local valley freeways and highways needing expansion or repairs.  Beginning with I-17 and US-60 as a Pilot Program, as part of the plan to expand with an HOV lane, ADOT selected to utilize the ARFC method rather than the typical PCCP replacement methodology.  The entire project was completed in multiple phases which is a continuing process throughout the Maricopa Association of Governments (MAG) region.

Several prime contractors were selected based on low bid for each phase of the Pilot Program and DBA was on several teams to provide the prime contractor with the initial PCCP slab repairs, sealing deck cracking with methacrylate on bridge structures, epoxy injections, and removing and replacing failing bridge deck joints prior to the placement of the ARFC.

• Phase I – Fall, 2003 – Loop 101 (Union Hills Drive to 31st Avenue, 21st Avenue to SR-51, and Frank Lloyd Wright Bl. to Mountain View).  SR-51 (Loop 101 to Cactus Road), and a section of the Loop 202 (Gilbert to Higley).
• Phase III – Spring, 2005 – I-10 (I-17 to 67th Avenue and SR-51 to Van Buren), and two sections of the Loop 101 (8th Street to US-60, and Scottsdale Road to Frank Lloyd Wright Bl.)
• Phase V – Fall, 2005 – Loop 101 (31st to 21st Avenue, Tatum Bl. to Scottsdale Road, and Price to McKellips Road).
• Phase VII -Fall, 2006 – I-10 (the Agua Fria River to 67th Avenue).

Each Phase of the project included multiple bridge structures requiring proper sealing and repairs.  DBA performed full depth PCCP repairs, remediation of longitudinal and transverse pavement joints, bridge deck rehabilitation, bridge deck joint removal and replacement.