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Access Road Gets Safety Improvements

20 Sep 2019/in , , /by

DBA recently completed another access roadway improvement project for Salt River Project at Horse Mesa Dam.  Along the steep, winding narrow access road from Apache Trail down to the dam, there are a total of 6 switchback areas that had become unsafe for driving (particularly in the early morning hours).  DBA was contracted by the utility company to improve one of the worst corners by building a retaining/curb wall, an anchored and rebar reinforced turndown, and improved driving surfaces that were rebar reinforced and tined for better traction.  The project also called for the installation of additional CMP under the roadway and the construction of two modified concrete headwalls for improved drainage.

Adding to the complex project in an extremely remote area of Maricopa County, was the delivery of concrete to the site. Due in part to the steepness of the access road and the tight turns, concrete mixer trucks could only haul 6 CY per load. The entire project required a total of 160 CY. As A result, the project was completed in four weeks.

Wellton-Mohawk Bridges Moving Ahead

04 Sep 2019/in , , , /by

DBA submitted a bid to ADOT for the demolition and reconstruction of two bridges in Yuma County over the Mohawk Canal. Located off the ADOT highway system on Avenue 37E and Yuma County’s 6th Street is one bridge. The other bridge is located on Avenue 46E and Yuma County’s 1-1/2 Street. Both bridges require the removal and replacement of the bridge girders, removal and replacement of the bridge railing/barriers, construction of new bridge abutments, removal and replacement of the asphaltic concrete pavements on the deck and additional 50-foot approach slabs will be constructed.

DBA crews started on the project in late August and expect to be complete by the end of 2019. The bridge construction is directly over an irrigation canal that is used for the agricultural community in Wellton. As a result, extensive measures have been taken to protect the water from construction debris and chemical intrusion.

Tempe Pedestrian Bridges Move into Second Phase

19 Aug 2019/in , , /by

Earlier in the year, DBA was awarded a contract to complete the rehabilitation of two pedestrian/bicycle bridges in Tempe that cross US-60 (Superstition Freeway). Both bridges are located between the I-10 and Loop 101 interchanges (Country Club Drive and College Avenue) and required:

Painting the bridges

Installation of new LED light fixtures

Remove/replace or repair concrete paving

Installation of concrete sleeper slabs

Remove/replace or repair portions of the concrete retaining walls

Seal cracks along the concrete paving

Repair the pedestrian handrails

The bridges were built in 2003 and 2004, respectively, are frequently used by the residents in the neighborhoods, and required extensive reparations for safety concerns and aesthetics.

ADOT Hard Bid Project Completed Early

31 Jul 2019/in , , /by

This Federally-funded project was contracted through the Arizona Department of Transportation for the City of Globe.

The project was to complete both Oak Street from Ash Street (US-60) to Hill Street and Hill Street from Oak to Ash in the historic downtown area. DBA’s scope of work included:

  • Mill & overlay of all asphalt pavements
  • Construct new concrete curb, gutters, sidewalks, driveways, ADA ramps and catch basins
  • Apply new pavement markings and striping

The $577,665 project was completed in two phases due to the winter shutdown.

DBA Constructs Two New Shooting Ranges

09 Jul 2019/in , , , /by

Under our existing Job Order Contract with the Arizona Game & Fish Department, DBA has completed a new shooting range in Kingman and is under construction for a new sharp-shooter range in Sierra Vista.

Near Kingman, at the 7-Mile Shooting Range Facility, DBA was responsible for the earthwork associated with the reconstruction of a high-power rifle range with 50 meter long berms on both sides of range with 7-foot high retaining walls.

Within the same facility, DBA was contracted to dig out a new below-grade hand-gun shooting range with 20-foot high retaining walls.

Upon completion of the Kingman project, DBA was awarded a second contract with AZ Game & Fish to build a new sharp-shooter facility in Sierra Vista, Arizona. The project will be built in three phases to include the West Berm Range 3 with 20-foot tall earthen walls, the backstop berm at Range 3, and a 20-foot tall backstop berm at Ranges 1 & 2.

Both facilities required heavy earthmoving operations. The Sierra Vista facility required hauling and placement of more than 19,230 CY.

DBA Part of Surprise’s New Veterans Reflection Circle

01 Jul 2019/in , , /by

Volunteerism is an important part of being an employee of DBA Construction. At a recent City of Surprise Council Meeting, DBA project management stepped up to assist the City along with several other contractors, consultants, and material suppliers to donate labor and materials to build a new memorial for wounded combat veteran and long-time Surprise resident, Brian Mancini.

The project, Veterans Reflection Circle, is going to be built between the main library and City Hall near the lake and will include a plaque commemorating Brian’s service to his country as well as a water feature, landscaping and hardscaping provided by the volunteers and donations.

DBA project management recently attended the Ground Breaking Ceremony on June 24th. The project is scheduled for completion in time for Veterans Day in November.

Drainage Improvements Added to Remote Access

04 Jun 2019/in , , /by

Beginning in June, 2015 and DBA’s first contract with Salt River Project at Horse Mesa Dam, DBA continues to support Salt River Project on maintaining safe access from the Apache Trail down to the dam. Our first project the Rock Debris Talus Stabilization project stabilized the rock face above the employee parking area and the main access to the dam. Since, then, DBA has embarked on several projects along the roadway to provide safer travel for dam engineers and suppliers driving to the site.

On April 4, 2019, DBA was once again awarded a contract for an additional $269,533.00 to improve drainage along the access roadway. This included excavation for and new construction of curb, gutters, valley gutters, and shotcrete spillways along both the Main Access Road and the road leading to the Man Camp.

Total quantities included:

450 SF of Valley Gutter; 1,195 LF of Concrete Curbing; 418 SF of Shotcrete Applications; 1,318 LF of Rebar; and 146 Each of #8 Bar Anchors

Peoria Awards Bridge JOC to DBA for Second Term

06 May 2019/in , , /by

In November, 2013, DBA Construction was awarded its first Job Order Contract for Bridge Deck Repair and Rehabilitation with the City of Peoria.

Awarded for a single year with the possibility of four additional contract years awarded based on performance, DBA recently completed its fifth year with the contract.

In March, 2019, the City issued the RFQ for Bridge and Guardrail Repairs and Rehabilitation (2019) and DBA, due to their efforts, was again rewarded with yet another JOC with Peoria.

Innovation Results in Permanent Solution for SRP

15 Apr 2019/in , , /by

In August, 2018, the Phoenix area experienced some of the State’s worst monsoon winds in recorded history.  Many locations within the metropolitan area experienced serious damage caused by high winds and lightning strikes.  One such location, in the west valley near Tonopah, Salt River Project’s (SRP) 500 kV lattice power transmission poles (Hassayampa-Jojoba Line section) were twisted at their concrete foundations and bent over.  This created a situation where many local businesses and residents lost power.

Once the emergency response was executed and temporary power was restored, SRP could get on with the business of repairing the foundations and replacing the towers.

In February, 2019, DBA was contracted by SRP to construct the ultimate replacement of the foundations so that SRP personnel could replace the 500 kV towers “walking giants”.  This included very precise templates for drilling core holes in the newly poured foundations that would fit-up with SRP’s anchor bolt assemblies. 

Project management staff, structural superintendents and DBA mechanics reviewed the damage, drove to the site and took photos of the existing conditions and met with the SRP Principal Engineer, Jim Adams.  SRP’s original plans included a template for the fit-up that did not take into consideration the added grout to the core drill holes and rebar that would need to be in place as part of the remediation.  DBA developed a unique template that took all of the new conditions into consideration and created a mock-up in the DBA maintenance yard to demonstrate its use to SRP engineering management.

Once the solution was approved, the remediation project was able to proceed.  DBA’s scope of work included:  removal of the existing concrete foundations (8 each) down to 1’ below grade (removals varied from 1’-9” to 3’-0” depending on location); holes were drilled in each foundation to accommodate rebar dowels and the forming of a rebar cage to pour new concrete atop the existing foundation for structural strength.  Once the concrete was set, DBA subcontractors cored holes in the new foundation (using the new template layout).  DBA placed the anchor bolts (3.5” diameter 3 per foundation placed 15’-3” deep) into the holes and grouted around them, lining up precisely with SRP’s anchor bolt assemblies and preparing the new foundations for the steel towers. 

DBA crews had to coordinate our construction work with the SRP crews who were bringing in the new steel towers for fit-up in the field.

The project was a great success and DBA was praised for our innovative approach to the challenge.

“Everyone is very pleased with the work you guys did for us.  Grout is good, tower legs fit-up nicely, and finished ahead of schedule.  As always, very innovative on your part to a non-standard project.”

Jim Adams, Principal Engineer, Salt River Project

SRP SUBSTATION IN EAST VALLEY

04 Mar 2019/in , , /by

As part of a larger construction team, DBA is providing concrete foundation construction for a new 17-acre “greenfield” site that when complete will be the new Henshaw Substation in Chandler. Located on the southwest corner of Germann and Price Roads, DBA was contracted to provide excavation of the trench for the 11′-4″ high perimeter wall surrounding the entire site, as well as grounding conductors, placement of the rebar and concrete for the wall foundations (3,600 LF).

DBA Construction, Inc.

Since 1996, DBA has successfully completed heavy civil projects in markets across the southwest. DBA's expertise is diverse and includes Airports & Airfields, Power Generation & Transmission, Irrigation & Flood Control, Mining & Industrial and Municipal and Governmental markets. The use of innovative solutions to construction challenges and DBA's commitment to exceeding client expectations is demonstrated in our client's continued trust in us.
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