DESCRIPTION
In the Camp Seven Creek Drainage, one undersized culvert, (CS-1: NESE S14 T33 R28), was removed and replaced with a single span bridge (45'). The channel was widened and sloped to engineered specifications. A new bridge will be delivered and set once the contractor has prepared the site. The channel, grade and gravel approaches was reshaped. Critical area plantings (mulching and seeding) occurred in the fall.
In addition, within the Camp Seven Creek drainage, another undersized culvert, (CS-2: SENE S26 T33 R28), was replaced with a new appropriately 9' sized culvert. After the undersized culvert, CS-2, was removed, the channel was widened and sloped to engineered specifications. The new culvert, CS-2, was positioned and backfilled with specified rock and fill. Areas along the road surface will have critical area plantings (mulching and seeding) to occur in the fall as the weather cools.
One of the main factors limiting salmonid production in the Omak Creek and connected tributaries is high proportion of fine sediment.The anticipated result is to reduce the risk of the road sections at these undersized drainage structures from washing-out thereby depositing large volumes of road fill into the stream channel. In time it is anticipated that the volume of fine sediment in Omak Creek will be measurably reduced thereby resulting in an increase in egg-to-fry survival.