Arizona Administrative Code › Title 12 - NATURAL RESOURCES › Chapter 15 - Department of Water Resources › Article 12 - DAM SAFETY PROCEDURES › Section R12-15-1215 - Construction Drawings, Construction Specifications, and Engineering Design Report for a High, Significant, or Low Hazard Potential Dam

Current through Register Vol. 30, No. 28, July 12, 2024
The owner and engineer are responsible for complete and
				  adequate design of a dam and for including in the application all aspects of
				  the design pertaining to the safety of the dam.
1. Construction Drawing Requirements. The
				construction drawings required by
				R12-15-1208(5),
				R12-15-1209(E)(1),
				and R12-15-1210(A)(6) shall include the following:
a. The seal and signature of the responsible
				engineer in accordance with A.A.C.
				R4-30-304.
b. One or more topographic maps of the dam,
				spillway, outlet works, and reservoir on a scale large enough to accurately
				locate the dam and appurtenances, indicate cut and fill lines, and show the
				property lines and ownership status of the land. Contour intervals shall be
				compatible with the height and size of the dam and its appurtenances and shall
				show design and construction details.
c. A reservoir area and capacity curve that
				reflect area in acres and capacity in acre-feet in relation to depth of water
				and elevation in the reservoir. The construction drawings shall show the
				spillway invert and top of dam elevations. The construction drawings shall also
				show the reservoir volume and space functional allocations. The construction
				drawings may include alternate scales as required for the owner's
				use.
d. Spillway and outlet works
				rating curves and tables at a scale or scales that allow determination of
				discharge rate in cubic feet per second at both low and high flows as measured
				by depth of water passing over the spillway control section.
e. A location map showing the dam footprint
				and all exploration drill holes, test pits, trenches, adits, borrow areas, and
				bench marks with elevations, reference points, and permanent ties. This map
				shall use the same vertical and horizontal control as the topographic
				map.
f. Geologic information
				including 1 or more geologic maps, profile along the centerline, and other
				pertinent cross sections of the dam site, spillway or spillways, and
				appurtenant structures, aggregate and material sources, and reservoir area at 1
				or more scales compatible with the site and geologic complexity, showing logs
				of exploration drill holes, test pits, trenches, and adits.
g. One or more plans of the dam to delineate
				design and construction details.
h.
				Foundation profile along the dam centerline at a true scale where the vertical
				scale is equal to the horizontal scale, showing the existing ground and
				proposed finished grade at cut and fill elevations, including anticipated
				geologic formations. The foundation profile shall include any proposed grout
				and drain holes.
i. Profile and a
				sufficient number of cross sections of the dam to delineate design and
				construction details. The drawings shall illustrate and show dimensions of
				camber, details of the top, core zone, interior filters and drains, and other
				zone details. The profile of the dam may be drawn to different horizontal and
				vertical scales if required for detail. A maximum section of the dam shall be
				drawn to a true scale, where the vertical scale is equal to the horizontal
				scale. The outlet conduit may be shown on the maximum section if this is
				typical of the proposed construction.
j. One or more dam foundation plans showing
				excavation grades and cut slopes with any proposed foundation preparation,
				grout and drain holes, and foundation dewatering requirements.
k. Plan, profile, and details of the outlet
				works, including the intake structure, the gate system, conduit, trashrack,
				conduit filter diaphragm, conduit concrete encasement, and the downstream
				outlet structure. The drawings shall include all connection and structural
				design details.
l. Plan, profile,
				control section, and cross sections of the spillway, including details of any
				foundation preparation, grouting, or concrete work that is planned. A complex
				control structure, a concrete chute, or an energy dissipating device for a
				terminal structure shall include both hydraulic and structural design
				details.
m. Hydrologic data,
				drainage area and flood routing, and diversion criteria.