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Case History – Ford Ranch SDI

Case History – Ford Ranch SDI

Ford Ranch Subsurface Drip Irrigation Project

Service provided: Dispersal of natural gas produced water

Customer: stormcat Storm Cat Energy

Location: Campbell County, Wyoming

Daily capacity: 11,000 barrels (1.75 ML) per day

Project start date: November 2007

Area developed: 155 acres (63 ha), 318 mi (511 km) drip tubing, 6.2 miles (10 km) pipeline, pond capacity 15 acre feet (19 ML)

Water quality: EC = 2330 µS/cm, SAR = 31, Na = 575 mg/L, HCO3 = 1430 mg/L, TDS = 1550 mg/L

Crops produced: alfalfa (lucerne), sanfoin – grass mix

 

as-built drawing of irrigated blocks at Ford Ranch

as-built drawing of irrigated blocks at Ford Ranch

drilling shallow monitoring wells for groundwater investigation

drilling shallow monitoring wells for groundwater investigation

Modflow groundwater model used to design field blocks to minimize effects on surface and groundwater

Modflow groundwater model used to design field blocks to minimize effects on surface and groundwater

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This project abuts the Wyoming – Montana border along the Powder River. Because of friction between the two states over water quality and volume delivered to Montana, it was difficult to permit. BeneTerra did extensive groundwater investigation and developed a model to estimate the impact of the subsurface drip irrigation (SDI) system on the river.

The model showed that the small groundwater mound created by the SDI system would prevent riparian losses and cause more water to be delivered to Montana. The model was adopted and optimized water dispersal rates for individual field blocks to prevent natural gas produced water from entering the stream. There have been no adverse environmental impacts to soils, ground or surface water.