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

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11.3 Repair and Breaching of Non-jurisdictional Dams - Repair and breaching of existing non-
jurisdictional size dams shall meet the following requirements:

11.3.1 Owners who intend to repair, modify, breach or entirely remove a non-jurisdictional
dam shall submit written notice to the State Engineer prior to construction.

11.3.2 High Hazard or Significant Hazard non-jurisdictional size dams shall have the plans
for repair or breaching prepared by an engineer and submitted to the State Engineer for
approval before construction. The plans shall be of sufficient detail to allow review and
provide for the quality control ofthe work and must meet the requirements of Rule 7.1.2.

11.4 Spillway Requirements - Spillway sizing requirements shall meet the criteria for the
appropriate hazard classification of the dam for a Minor size dam as specified in the Inflow Design
Flood Requirements table in Rule 5.5.6.

11.5 Construction of Jurisdictional Size Dams under Rule 11- The construction of non-
jurisdictional size dams under these provisions with freeboard in excess of five feet with the intent
to convert the dam to a jurisdictional size structure with only minor modifications to the spillway
will not be approved. The modification of a non-jurisdictional size dam to a jurisdictional size dam
will not be permitted within 10 years of the construction of the original structure and/or without
meeting the requirements of Rule 5.

Rule 12. General Maintenance, Ordinary Repairs. And Emerl!encv Actions:

12.1 General Maintenance - General maintenance and ordinary repairs that do not require prior
approval of the State Engineer for the purpose of this Rule shall be those activities that do not
impair the safety of the dam. These maintenance and repair activities include:

12.1.1 Removal of brush or tall weeds.

12.1.2 Cutting oftrees and removal of slash from the embankment or spillway. Removal of
small stumps is acceptable provided no excavation of more than 3 feet into the embankment
occurs. An engineer must oversee removal of trees and stumps larger than 12" diameter.

12.1.3 Rodent control, removal or extermination. Repair of minor rodent damage is
acceptable provided it does not involve excavation of more than 3 feet into the
embankment.

12.1.4 Repair of erosion gullies on the embankment or in the spillway. Large gullies that
have already weakened the dam must be repaired in accordance with Rule 6.

12.1.5 Surface grading of the embankment crest or spillway to eliminate potholes and
provide proper drainage provided that the freeboard is not reduced. Material placed on the
dam crest to restore the design freeboard must be compacted to specifications outlined in
Rule 5. The State Engineer must be provided notice prior to placement of material on the

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