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<br />5.A.(7)(f)(III) Borrow areas shall not be located closer <br />than 200 feet of either toe of the dam unless waived by the State <br />Engineer for good cause shown. <br /> <br />5.A.(7)(f)(IV) The dam crest and appurtenant structures <br />shall be accessible by equipment and vehicles for emergency operations <br />and maintenance. <br /> <br />5.A.(7)(g) Concrete dams shall be designed in accordance with <br />principles provided in U.S. Bureau of Reclamation publications "Design <br />of Gravity Dams", 1976, and "Design of Arch Dams", 1977. Roller com- <br />pacted concrete may be used in concrete construction in accordance <br />with the state-of-the-art. The State Engineer may require additional <br />analysis when the above cited references are inapplicable. <br /> <br />5.A.(8) An instrumentation plan which shall meet the following <br />requirements: <br /> <br />5.A.(8)(a) Gage rods shall be installed in the proximity to the <br />outlet on all dams. The zero mark of the gage shall be placed at the <br />invert elevation of the entrance to the outlet. The gage shall be <br />clearly marked in feet and tenths of feet, and extend to within one <br />foot of the crest of the dam. If the Division Engineer so requires, <br />the gage shall be marked in hundredths of a foot, The elevation of <br />the reservoir may be measured by install ing "gages" in the "wet well" <br />of an outlet, but they shall be calibrated to the invert of the <br />entrance to the outlet. <br /> <br />5.A.(8)(b) Class I and Class II dams shall have the following <br />instrumentation: <br /> <br />above; <br /> <br />5.A.(8)(b)(I) Gage rods as described in Rule 5.A,(8)(a) <br /> <br />5.A.(8)(b)(II) Monuments, which allow measurement of the <br />horizontal and vertical movements of the dam, that are installed in a <br />manner acceptable to the State Engineer; <br /> <br />5.A.(8)(b)(III) Weirs or flumes or other measuring devices <br />installed in a manner acceptable to the State Engineer, which allow <br />monitoring of leakage through the embankment or foundation; <br /> <br />5.A.(8)(b)(IV) Station markers at least every 100 feet along <br />the crest of the dam; and <br /> <br />5.A.(8)(b)(V) Piezometers to allow monitoring of the <br />phreatic surface within the dam installed in accordance with industry <br />standards and in a manner acceptable to the State Engineer. <br /> <br />- 25 - <br />