Santa Ana River Design Memorandum Number 1. Phase 2. GDM (General Design Memorandum) on the Santa Ana River Mainstem, Including Santiago Creek. Volume 6. Santiago Creek

摘要

This volume accompanies the main report and supplemental environmental impact statement for the Phase II General Design Memorandum for the Santa Ana River Mainstem including Santiago Creek and contains the general design for the Santiago Creek. The recommended plan for Santiago Creek consists of modifying the existing gravel pits for flood control storage, constructing an outlet structure from the gravel pits with a release capacity of 3500 cu ft/s and constructing a riprapped channel between the Santa Ana Freeway and the confluence with the Santa Ana River. The 5.5 miles of creek between the outlet structure and channel in the vicinity of Walnut Avenue to the beginning of the riprapped channel south of the Santa Ana Freeway would not be improved and would be managed by the local sponsor in accordance with FEMA guidelines. Keywords: Drainage area; Water conservation pool; Flood control storage; Riprap channel; Relocations; Hydraulics; Santa Ana River Basin; California. (edc)