BOARD01548

• Board Meeting Date: 1/25/2005
• Description: Proposed Revisions to the Rules and Regulations for Dam Safety and Dam Construction
• Board Meetings - Doc Type: Memo

5.3.4 The general conditions shall include statements that the plans and specifications
cannot be significantly changed without the prior written approval ofthe State Engineer in
accordance with Rule 9.1.8.

5.3.5 The general conditions shall include the provision that construction shall not be
considered complete until the State Engineer has accepted the construction in writing.

5.3.6 The specifications shall provide that the owner's engineer will monitor the quality of
construction as specified in Rule 9. If the engineer monitoring the construction for the
owner is not the engineer who developed the design and construction documents, the
engineer monitoring the construction for the owner is responsible for the quality of
construction, compliance with the approved design and specifications, and preparation of
the necessary documentation for the State Engineer's review and approval of all
construction change orders, and preparation of the project completion documents required
in Rule 10.

5.3.7 The specifications shall include as a minimum, but are not limited to, the following:

1. The quality of materials used in construction;

2. The acceptable quality of workmanship;

3. The reference to applicable standards, if any;

4. The required tests and estimated frequency of testing; and,

5. The action to be taken if unsatisfactory materials or workmanship are
discovered in the construction.

5.4 Hazard Classification Report - The hazard classification report shall identify the size and
hazard classification category for the proposed dam, or enlarged existing dam. A report is not
required for dams that are declared as High Hazard; however, a dam failure inundation map will be
required for the Emergency Action Plan pursuant to Rule 16. The report shall include sufficient
information regarding assumptions, calculations and data used to develop the dam failure flood
hydrograph and an assessment of the impact of the dam failure upon the downstream floodplain.
The dam shall be classified according to the definitions of Rule 4. The hazard classification report
shall be in a form acceptable to the State Engineer and shall include, but not be limited to:

5.4.1 Dam failure inundation maps are required for all dams classified as High Hazard and
Significant Hazard. Inundation maps are required for dams classified as Low Hazard unless
the dam is located in a remote area where no development exists downstream ofthe dam;

5.4.2 Cross-sections along the watercourse, drawn to scale, showing water surface
elevations at critical locations where structures may be impacted by the flood wave. Cross-
sections shall show discharge in cubic feet per second, average velocity in feet per second,

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