Barnard Construction Company, Inc.

Many Farms Dam Modification

Project Type:
Dams & Reservoirs

Location: Many Farms, Arizona
Owner: Bureau of Indian Affairs/Navajo Indian Reservation
Engineer: Bureau of Reclamation
Contract Value: $12.8 million
Contract Type: Fixed Unit Price (competitive bid)

Project Photos


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Project Highlights

This project was completed in two phases.

Phase I: Raised three dikes 10 feet

110,000 CY zoned fill
Constructed 6,200 CY roller-compacted concrete spillway
Foundation dewatering
Jet eductor dewatering system
Relocated two public roads
Constructed canal crossing

Phase II: Raised dam 10 feet

200,000 CY zoned fill
Constructed cofferdam
Installed new toe drains
Demoolished and reconstructed outlet works
Constructed outlet works canal
Placed 49,000 CY riprap on face of dam and dikes
Production of 27,000 CY riprap
Vertical chimney filter (sand)
Shielded trencher required for toe drain construction
Foundation dewatering
Jet eductor dewatering system
New roller-compacted concrete (RCC) spillway

Project Details

The Many Farms Dam Project involved repairing the main dam and three saddle dikes with filter systems and new impervious embankment. A new roller-compacted concrete emergency spillway along with outlet works also was part of this project. The remote site required extensive scheduling in order to meet milestone requirements and material deliveries. The project was completed on schedule.

Project Location