INDEFINITE DELIVERY INDEFINITE QUANTITY (IDIQ) CONTRACT FOR DRILLING AND SAMPLING SERVICES
Us Army Corps of Engineers, Sacramento District, Contract No. DACW05-03-D-0003; 2003-ongoing; $4,000,000
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| Video inspection of a pressure relief well at Farmington Dam |
This contract provides a convenient vehicle for the US Army Corps of Engineers, Sacramento District and its customers to secure a variety of drilling, sampling, and well inspection and rehabilitation services from R&M. As of October 2005, R&M had been issued a total of 21 task orders with a total contract amount exceeding one million dollars. Two of the recently completed task orders, which are briefly described below, involved evaluation and rehabilitation 37 pressure relief wells at Farmington Dam (near Stockton, CA) and video inspection and rehabilitation of 17 observation wells at Hidden Dam (near Madera, CA).
The 2005 well evaluation and maintenance program at Farmington Dam consisted of the following:
- Initial measurement of the depth to bottom in all wells and comparing the data with the 1998 measurements to determine extent of sediment accumulation in wells.
- Rehabilitating the wells by bailing and swabbing.
- Pumping the wells (i.e., performing pumping tests) to further rehabilitate the wells and collect data that were used to estimate aquifer properties.
- Conducting downhole video inspection of wells to document interior condition of wells.
- Visually inspecting the exterior features of the wells and associated support structures (concrete pads, discharge line, and concrete ditch) for evidence of structural damage and repair needs.
- Final measurement of depth-to-bottom to assess the effectiveness of the rehabilitation and provide a reference point for assessing future sediment accumulation.
The project at Hidden Dam consisted of performing the following:
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| Pumping test at a pressure relief well at Farmington Dam |
- Initial measurement of the depth to water (DTW) and depth to bottom (DTB), or depth to apparent bottom when obstructions were encountered, and comparison of the measured DTBs with the reported installed depths and the data reported for a 17 January 1990 well sounding to determine extent of sediment accumulation and/or presence of obstructions.
- Cleanup of the well interior via jetting, attempt at removing obstructions via jetting and a number of other techniques, and follow-up depth measurements to assess the effectiveness of the rehabilitation effort.
- Conducting downhole video inspection of wells to document interior conditions of wells and the effectiveness of rehabilitation.
- Documenting observations and findings in a final project report.
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