SEPA Rules
Grant PUD is proposing to repair concrete damage caused by scour by using divers to access the damaged areas of the fish bypass and spillway apron at Wanapum Dam.
WAC 197-11-965 Adoption Notice
ADOPTION OF EXISTING ENVIRONMENTAL DOCUMENT
Adoption for (check appropriate box) 6 DNS o EIS o other: _____________________
Description of current proposal:
Wanapum Dam Fish Bypass
Grant PUD is proposing to repair concrete damage caused by scour by using divers to access the damaged areas of the fish bypass and spillway apron at Wanapum Dam.
Repairing specific cracks and voids. In general this would entail saw cutting edges approximately 1-inch deep, cleaning out debris and placing hand packed underwater cement into the voids. The repair products are anticipated to be one of a number of underwater concrete products including HP Infrastructure Grout; 5 Star Hand-Pack Underwater Cement or SUBAC. Once the repairs are completed, inspections should be scheduled every 2 years to monitor performance.
Wanapum Spillway
The Project involves the repair of surficial scour damage to the concrete spillway apron and ogee at Wanapum Dam. The work will include the removal and disposition of loose rock and sediment in the work area, the removal of deteriorated concrete, the installation of reinforcing dowels and reinforcing steel, the installation of formwork for the new concrete and the placement and curing of concrete. The approved concrete mix will include an anti-washout admixture. The work will be similar in nature to the work completed at Priest Rapids Dam in 2006-2007 and as approved in the HPA for that work issued May 16, 2006 (Control No. 103187-2).
Removal and disposition will include any loose rock/sediment that has deposited on the apron in the work area, and any concrete removed to prepare the surface for the new concrete overlay. Disposition of material removed during construction will be to an approved upland disposal area.
Proponent: Public Utility District No. 2 of Grant County (Grant PUD)
Location of current proposal: Wanapum Dam, Highway #243, Beverly, Grant County, WA 99231
Title of document being adopted: 1)Priest Rapids and Wanapum Dam's Spillway Apron Repair and 2) Wanapum Dam Future Unit 11 Fish Passage Project.
Agency that prepared document being adopted: Public Utility District No. 2 of Grant
County (Grant PUD)
Date adopted document was prepared: Priest Rapids and Wanapum Dam's Spillway Apron Repair prepared on July 13, 1992 and Wanapum Dam Future Unit 11 Fish Passage Project prepared December 14, 2004.
Description of document (or portion) being adopted: Determination of NonSignificance
and Environmental Checklists on underwater concrete installation and repair at Wanapum Dam.
If the document being adopted has been challenged (197-11-630), please describe: These documents have not been challenged.
The document is available to be read at (place/time): Public Utility District No. 2 of Grant
County (Grant PUD), P.O. Box 878, 30 C St. SW, Ephrata, WA 98823 between 8:00AM and 5:00PM.
We have identified and adopted this document as being appropriate for this proposal after
independent review. The document meets our environmental review needs for the current
proposal and will accompany the proposal to the decision maker.
Name of agency adopting document: Public Utility District No. 2 of Grant County (Grant PUD)
Contact person, if other than
responsible official:_______________________ Phone: (509)754-5098 ______
Responsible official: J. Darrell Pock ________________________________
Position/title: Project Specialist III ___________ Phone: (509)754-5098______
Address: P.O. Box 878, 30 C St. SW, Ephrata, WA 98823 _________________
Date: September 25, 2013 Signature: /s/ J. Darrell Pock
#10107/3335213
Pub.: October 2 & 9, 2013