5. Temporary Measures. During the construction phase, temporary diversions,
5. Temporary Measures. During the construction phase, temporary diversions, berms, grassed waterways, special culverts, shoulder dikes temporary stilling or detention/retention basins or such other mechanical measures as may be necessary may be required by the Board to intercept and divert surface water runoff. Runoff flow shall not be routed through resource areas of protected vegetation or revegetated slopes and other areas. Temporary runoff from erosion and sedimentation controls shall be directed according to BMPs, such as vegetated swales. Retaining walls may be required where side slopes are steeper than a ratio of 3:1.