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Specialty Work Completed at Yuma Proving Ground

12 Nov 2018/in , , /by

Hired as specialty subcontractor for the U.S. Army MATOC (Multiple Award Task Order Contract) task order, the project was to repair two existing brine evaporation ponds (approximately 5 acres total) at Yuma Proving Ground to help prepare the ponds for a new geotextile liner. Through our extensive work at Palo Verde Generating Station and other locations using geotextile liners, DBA was recommended for this important military project. Our scope of work included:
* Remove the existing liners and dispose at landfill
* Fine grade the slopes on the north and south ponds
* Dig anchor trenches around both ponds and backfill after the new liners were installed
* Repair an inflow diversion structure
* Temporary removal and reinstallation of barbed wire fencing around both sites
Through our value-added/innovation meetings, DBA was able to incorporate several ideas for budget savings that gave the project an additional $12,000 and saved 5 days on the original schedule.

DBA Provides Better Access for Tempe

02 Nov 2018/in , , , /by

The City of Tempe had built numerous, multi-use paths in various locations across the City. At 11 different locations, access to the multi-use path for use by the City street sweeper crews was hindered by the lack of continuous access from the neighboring street or alleyway. In some locations, the only access to the path was to drive over several hundred feet of dirt and rock. This surface was not optimal for the sweepers. Submitting a bid on a hard bid project, DBA was awarded the contract as the lowest responsible bidder. Our scope of work included:

Surveying
Subgrade preparation
Placement of aggregate base course (ABC)
Placement of AC paving
Construction of concrete sidewalks
Construction of concrete driveways
Demolition of existing terrain
Removal of existing signage, posts
Relocation of irrigation sleeving
Modification to landscaping
Striping and pavement markings

Scottsdale Gets Extension of Multi-Use Path

26 Oct 2018/in , , , /by

Working directly adjacent to Scottsdale’s City Hall Complex which includes City Hall, Capital Project Management, Engineering, Development Services, the Main Library and the Center for the Arts, DBA was contracted through our Job Order Contract to build out the multi-use path from the Indian Bend Wash (east of Miller Road) down Second Street to 75th Street where it connects to the downtown complex.

The job order included widening the existing sidewalk from 6′ wide to 12′ wide (creating the multi-use path) to accommodate bicycles, skateboards, Segways and pedestrians. The extension connects the park at Indian Bend Wash with the downtown buildings and the library.

Extensive communication was required to coordinate construction efforts with adjacent homeowners and businesses along the route and traffic control measures were also very important to maintain access and protect the driving public along busy Miller Road. DBA’s scope of work included:

> Demolition of existing pavement and concrete flatwork
> Subgrade preparation
> New A/C paving
> New concrete curb, gutter, driveways, and the multi-use path
> New ADA ramps
> Manhole adjustments
> New catch basins
> Trenching for new electrical conduit
> New masonry retaining wall at the library
> Storm drain connections
> Relocation of control cabinets and traffic signal boxes
> New signage and striping/markings
> New street lights/signal poles/mast arms
> Minor landscaping and placement of decomposed granite
> Replacement of the existing stairs with an ADA-compliant ramp from the street level to the garden level at the City’s park

Multiple areas required special attention and “field fit” minor design services were included to work around existing irrigation piping and traffic signal poles.

Bridge Deck Overlay and Sealing JOC Sets a New Standard

22 Aug 2018/in , , /by

DBA received a new Job Order Contract (JOC) from the Maricopa County Department of Transportation (MCDOT) in late 2017. Earlier this year, we were finally asked to provide services to the County to repair six bridges across the County. Each bridge was contracted as a separate job order and included Epoxy bridge deck sealing services and some minor concrete repairs, as well as restriping and raised pavement markings. Some of the bridge work was completed overnight with full closures approved by MCDOT and others required DBA to have at least one lane open in each direction at all times, requiring completion of those bridges in halves. The six bridges included:
> Eagle Eye Road at the Central Arizona Project (CAP)
> Patton Road at the CAP
> 163rd Avenue at the CAP
> Wickenburg Road at the CAP (also known as Aguila Road)
> El Granada at the Beardsley Canal
> Dysart Road at the Beardsley Canal

The client’s representative, Jimmy Camp – Bridge Engineer commented that “This work really turned out nice. DBA is doing a great job for MCDOT on this project! The overlay work was night work which we required a manufacturer’s representative on site. MCDOT got a better job than anticipated.”

Overnight Concrete Pour at Luke AFB

20 Jun 2018/in , , , /by

DBA crews worked overnight on Monday to pour concrete at Luke AFB for the F-35 Fuel Offload Facility project. The project includes multiple underground structures and extensive Portland Cement Concrete paved (PCCP) areas for the loading and off-loading of jet fuel at the tank farm. This project is an addition to the project DBA constructed two years ago at the Base for new fuel tank foundations and concrete drives.

Work at Water Campus Provides Big Infrastructure Upgrades

04 Jun 2018/in , , /by

Utilizing DBA’s Job Order Contract with the City of Scottsdale, several infrastructure improvements projects were recently completed.  The original project to build the Water Campus included funding only for the treatment and conveyance of water.  No funding was spent to improve the general infrastructure for the site which resides in a floodplain.  Several job orders were undertaken over the course of multiple years that included:

  • Water Campus Paving Improvements – DBA was responsible for the paving of all dirt access roads throughout the 15-acre site.  Our scope of work included roadway excavation, subgrade preparation, AC and PCC paving, constructing valley gutters, curb and gutter, provide crack sealing, adjust manholes and extensive erosion control.
  • Water Campus Drainage and Utility Infrastructure – DBA was contracted to provide earthwork and extensive trenching throughout the facility to install conduit for future solar array uses, install multiple concrete vaults, and manholes.  The drainage improvement project included extensive grading, hand placement of rip-rap on new retention basin slopes, placement of curb, gutter and valley gutters, aprons, adjustments to utilities and AC paving.  The project also included the installation of a 3-barrel, elliptical storm drain pipe going under the perimeter wall and tying into the existing storm drain system under Union Hills Drive.
  • The first job order was to provide the Water Campus with improved landscaping and hardscaping that included an awning over the main office entrance, installation of additional decomposed granite on slopes for retention basins, concrete benches and trash receptacles and the relocation of some large cacti to enhance the look of the area near the main office.

DBA Gets National Spotlight

27 Apr 2018/in , , /by

Through DBA’s Job Order Contract with the Arizona Game & Fish Department, we were selected to construct a temporary enclosure for elk at Raymond Ranch in Northern Arizona. The purpose for the enclosure was to provide a location where Game & Fish game wardens could keep the elk after catching them. Ultimately, the elk that were caught were shipped to West Virginia to help reestablish the dwindling elk population on the east coast.

The “wrangling” operation was covered live on national network news including Arizona’s affiliate at FOX (Channel 10).

Nearing Completion of Horse Mesa Dam Rockface Stabilization Project

26 Apr 2018/in , , , /by

Following on the footsteps of our successfully completed project for Salt River Project (SRP) at Mormon Flat Dam, DBA is under construction at another rockfall mitigation project at Horse Mesa Dam. The new project entitled, “Horse Mesa Dam Stabilization of Rock-Face at Water Line is one of the most complex projects we have undertaken for the Arizona utility. The contracts includes work at three separate locations for a total constructed value of nearly $2 million. It requires rock scaling and construction of a large retaining wall. The two other parts of the project include drainage improvements and the replacement of an existing wooden wall with a concrete wall above the dam access roadway. When complete, this will be DBA’s 10 project for SRP.

Pinal County Flood Mitigation Project a Big Success

11 Apr 2018/in , , , /by

Awarded in August, 2017, the Queen Valley Flood Mitigation Project Phase II involved the replacement of an existing pipe culvert under Sharon Drive at Queen Creek with a multi-barrel, cast-in-place box culvert.  The project was necessary because of erosion damage and scour conditions under the roadway after a summer monsoon.  In addition to constructing the new drainage structure, DBA was tasked with providing gabions along the banks leading up to the downstream culvert, repaving the roadway, striping, and general earthwork on both sides of the structure.  The project finished on time and within the original budget.

“Construction on the Queen Valley project went smoothly and DBA stepped up to the plate to get the work done efficiently and without any setbacks.  Through this project, we’ve developed a great working relationship with DBA and have the utmost trust and confidence in them.  We would be happy to use DBA again for future projects.”

Chris Wanamaker, P.E., CFM, Section Chief, Pinal County, Flood Control District

Central Arizona Project Awards Two Roads to DBA

26 Dec 2017/in , , , /by

Following on the footsteps of our original roadway construction and drainage project for the CAP in 2014, DBA was once again contracted by the Central Arizona Project to complete construction of two access roads to their communication towers.  Both roads provide vehicular access to CAP’s microwave communication towers that control the water distribution in the canal.

This year, our portion of the Helmet Peak job began where we left off with Phase I in 2014.  Our scope of work included roadway and drainage channel excavation through hard rock and the placement of 4″ PCCP (concrete paving) for a total 3,200 SF.  The second project was for Pan Quemado Peak near Marana, Arizona which required extensive rock hammering, placement of aggregate base, and PCCP (concrete paving) up the access road from the bottom to the top for a total of 7,400 SF.

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