Report of the Secretary of the Army
on Civil Works Activities for Fiscal Year 1992
Department of the Army Corps of Engineers
Extract Report of the Walla Walla District

Preconstruction, Engineering and Design

Little Wood River Project, Vicinity Gooding and Shoshone, Idaho

The Little Wood River Project was authorized by the Water Resource Development Act of 1986. The proposed project would have consisted of a diversion channel and two ponding facilities to divert floodflows from the Little Wood River into adjacent lava fields via the Dietrich and Milner-Gooding Canals for the purpose of reducing flood damages in the Gooding and Shoshone, Idaho, vicinities. As a result of lack of local sponsorship, the project is being terminated. A limited reevaluation paper was prepared and submitted to higher authority.

Preconstruction engineering and design activities were initiated in FY 1990 to review and update the project formulation development for the 1976 feasibility report. A coordination meeting was held in Gooding, Idaho, on 29 May 1991 with the project sponsor. At that meeting, the sponsor indicated that they no longer have financial capability to act as project sponsor. As a result, the project is being terminated pending completion of a reevaluated report documenting the reformation studies completed to date.

McNary Lock and Dam (Second Powerhouse), Oregon and Washington

The McNary Second Powerhouse project, with the exception of levee beautification of the existing levees adjacent to Richland, Pasco, and Kennewick, Washington, was automatically deauthorized on 16 November 1991, under Section 1001, PL 99-362. The levee beautification portion of the project was reauthorized by the Water Resource Development Act of 1990.

Zintel Canyon Dam, Washington

The project consists of a roller-compacted concrete dam 90 feet high with uncontrolled spillway and a fixed release outlet works that will create a detention reservoir of 1,260 acre-feet of capacity. The storage comprises 860 acre-feet for flood control and 400 acre-feet for sediment. In addition, the project also includes a conduit with a capacity of 400 cfs and a dike plug will be installed across the Union Pacific Railroad to protect downtown Kennewick, Washington, when major floods occur. The plan of improvement will provide protection against heavy rainfall, snowmelt, and thunderstorm floods to the city of Kennewick, Washington

Reevaluation of the project economics due to hydrology modifications resulted in a revised General design Memo No. 2 and a Post-Authorization Change Report. The GDM was approved by the Washington Level Review Board on January 24, 1990. The Post-Authorization Change Report, which reduced the flood control storage of the authorized project was approved March 5, 1990. FY 92 costs were $4,860,000 for construction of the dam and channel contracts.

The current total estimated Federal and non-Federal project cost is $9,700,000. The estimated Federal cost is $7,275,000.

Local cooperation. Non-Federal sponsors, city of Kennewick, Washington, shall pay 25 percent of the total project cost, or an estimated $2,425,000.