Powerline Plan and Environ. Assessment Jan. 2013 - Flood Control ...

Powerline Flood Retarding Structure
Pinal County, AZ
Draft Supplemental Watershed Plan
and Environmental Assessment
The Flood Control District of Maricopa County will provide technical leadership for the
installation, operation, and maintenance of the structural measures installed under the Supplemental
Watershed Plan and Environmental Assessment. The NRCS will work closely with the Sponsor in
the development of an operation and maintenance plan and will participate in annual inspections
jointly with the Sponsor and the State Office of Dam Safety.
Contracts to implement the Preferred Alternative measures will be between the District and the
selected construction firm. The NRCS will facilitate the request for funding from appropriations for
the dam rehabilitation program. The NRCS will provide the financial assistance to the District by
means of a cooperative agreement.
All works of improvement will be installed in accordance with NRCS standards and specifications
and meet all applicable local, state, and Federal regulations.
8.6.4 REAL PROPERTY AND RELOCATIONS
Implementation of the Preferred Alternative will not require procurement of real property rights by
the Sponsors.
• Additional temporary work easements for over excavation, loading, and unloading may be
required in the vicinity of the CAP canal for removal of the existing dam embankment.
Areas for construction staging and stockpiling can be located within the existing flood pool
area, and will not require additional temporary easement.
• It appears that no relocations as defined by the Uniform Relocation Act will be needed.
However, if any relocations are identified during installation of this undertaking, they must
conform with the Uniform Relocation Act and NRCS procedures, which are outlined in
NRCS Property Management Regulations.
8.6.5 OTHER AGENCIES
• The decommissioning plan will require review and concurrence from the ADWR Dam
Safety Division.
• Hauling on local roadways will likely require a haul-road permit that will be the
responsibility of the construction contractor.
8.6.6 FINANCING
The Sponsors are responsible for 35% of the total decommissioning cost. The NRCS will provide
65% of the total decommissioning cost with funding from PL 83-566.
8.6.7 OPERATION, MAINTENANCE, AND REPLACEMENT
The Flood Control District of Maricopa County will operate and maintain the Powerline Channel.
The operation, maintenance, and replacement program is carried out as prescribed in the Operation
and Maintenance Agreement. A new O&M agreement between the Sponsors and NRCS will be
written and executed prior to the beginning of construction. The agreement is developed in
accordance with the NRCS National Operation and Manual, and provides for inspections, reports,
and procedures for performing maintenance items and will be in force during the 100-year
USDA- NRCS Page 8-7 January 2013
Kimley-Horn and Associates, Inc.