Archive for category: Irrigation and Flood Control

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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

New Canal Lining Project Completed

05 Feb 2018/in , , /by

DBA crews recently completed the MC-85 – South Extension Canal Lining for the Buckeye Water Conservation and Drainage District in Buckeye, Arizona.

The project was to excavate a section of the drainage/irrigation channel along the South Extension Canal, place geogrid and aggregate base, demolish and remove existing drainage structures, place shotcrete lining with fibrous reinforcement and other miscellaneous work for a total of 2,925 SY of new channel.  The canal is located between Jackrabbit Trail and Perryville Road.

In order to meet the client’s dry-up schedule, DBA crews worked 6 days a week and 10-hour days.

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.

State Route 79 Box Culvert Extensions Nearly Complete

21 Jul 2017/in , , , /by

The project required the extension of existing box culverts at eight separate locations along State Route 79 between Florence and Oracle Junction (mile posts 122 to 124). The existing structures had suffered serious damage from recent flooding which included major deterioration of substructures and wing walls. The project was completed in phases, working one side of the highway at a time and rolling traffic control devices from one site to the next. This was done to maintain traffic on the highway during construction without interruption. The project was awarded under a design-bid-build contract with the Arizona Department of Transportation.

Shea Homes Hires DBA for Structures

18 Jul 2016/in , , /by

DBA was recently contracted by Shea Homes to construct two, three-barrel, cast-in-place concrete box culverts (10 x 4) along North Verde River Way East in the planned Tegavah development in North Scottsdale. Construction of the project included:
* Earthwork
* Structure formwork
* Cast-in-place concrete pouring and finishing
After the culverts were complete, the owner discovered that the parapet walls on the bridges were too low for safety. The designer was contacted and DBA’s crews were contracted to dowel into the existing parapet wall to add another 1.5 feet of concrete to the top of the walls.
Tegavah (formerly Vista Verde Golf Community) sits on 850 acres in North Scottsdale and when complete will offer 1,250 home sites, golf course, fitness center, multi-purpose areas, outdoor pool with hot tub, pickleball, tennis courts and other amenities including hiking and biking.

Big Award Goes to SRP Dam Project

10 May 2016/in , , , /by

At the Annual Associated General Contractors – Arizona Chapter dinner, DBA was presented with the Build Arizona Award in the Industrial category under $5 million for the recently completed Horse Mesa Dam Rock Debris Talus Stabilization project. Our client, Salt River Project, provided assistance with the submittal that addressed Safety, Schedule, Project Management, Environmental Stewardship, Client Service, and Innovative Solutions to Construction Challenges. DBA’s Project Manager, Jordan Hamula led a large crew of construction professionals on this project who worked efficiently and safely to bring the project in ahead of schedule, within the client’s budget, and with zero recordable and zero lost-time accidents.

Storm Damage Repairs, Vee Quiva Hotel & Casino

10 Mar 2015/in , , /by

The summer monsoons of 2014 hit the west valley extra hard.  The Vee Quiva Hotel and Casino near Laveen, Arizona experienced unprecedented rainfall and unpredictable run-off from nearby mountains.  Flash flooding in the area overtopped the adjacent drainage channel bringing debris to the property, exposing underground utilities, and obliterating the existing retention basins.

DBA was hired to regrade a large portion of the property, clean out all of the debris and re-landscape the retention basins to return them to their original condition.  Underground utility lines were reburied, the gabions at one end of the channel were reassembled and placed, sections of the concrete lined channel were re-lined with geotextile fabric and shotcreted over to prevent further erosion, concrete bollards were placed and the golf cart path was restored.

Williams – Concrete Labyrinth Spillway & Weir Box Construction

28 Oct 2013/0 Comments/in /by

Williams, AZ – DBA was responsible for the construction of the first labyrinth weir structure in the State of Arizona.  This project included safety modifications to reinforce and raise the existing earthen dam to meet specifications of the Arizona Department of Water Resources, the U.S. Bureau of Reclamation, and the U.S. Army Corps of Engineers.  Modifications included the installation of a toe drain system, weir box, and a sand chimney.

  • Major elements included:
  • Earthen embankment (8,000 CY)
  • Placement of rip-rap (1,000 CY)
  • Rock-fill buttress (1,500 CY)
  • Washed concrete sand (2,500 CY)
  • Installation of a cast-in-place concrete weir box
  • In order to meet the required specifications of the Army COE, concrete surface finishes had to be F2 and F3 types and the tolerable allowances were less than 1/4”.

Early in the project, the team discovered abandoned pipe that ran from the reservoir and continued under the dam.  It was eventually decided that it had been a waterline previously installed to service the City of Williams that had never been fully completed.  The project specifications required that the pipe be filled with a “mechanically-foaming concrete” material.  The project was contracted through Rummel Construction as the General Contractor.

AZ Game & Fish – Black Canyon Dam & Spillway Improvements (CMAR)

26 Oct 2013/0 Comments/in /by

The earthen dam is 420-feet long, 68-feet high with a crest width of 24 feet and a volume of 1580-acre feet.  The concrete emergency spillway is 40 feet wide that narrows down to 20 feet wide and ends in a 50-foot stilling basin.  Hazard classification changed from low to high requiring the reservoir to pass a probable maximum flood (PMF), which is considerably larger than the 100-year flood for which it was originally designed.

Scope of work included:

  • Reconstruction of concrete emergency spillway
  • Replacement of under-slab drainage system
  • Placement of anchors and steel reinforcing
  • Backfilling of new retaining walls
  • Placement of grouted rip-rap
  • Construction of new concrete drainage channels
  • Construction of access roadway from Forest Service roads to dam
  • Construction of temporary access roadway to crane pad on embankment
  • Placement of temporary crane pad
  • Grading of Forest Service roads from Highway 260 down to the lake for the project’s duration and after major storms

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