Appendix_A.pdf

7350778 Page 64

APPENDIX A:

WASHINGTON AND OREGON IN-WATER WORK WINDOWS

APPROVED WORK WINDOWS FOR FISH PROTECTION FOR

FOR WATERS WITHIN NATIONAL PARK BOUNDARIES,

COLUMBIA RIVER, SNAKE RIVER, AND LAKES

BY WATERCOURSE

(1) The general work window is given by watercourse: Columbia River, Snake River, Lakes or waters within National Park Boundaries.

(2) The work window for a listed watercourse applies to the mainstem. For approved work windows for tributaries or other freshwater areas, refer to Table 1.

(3) Where a tributary is listed as a boundary, that boundary shall be the line perpendicular to the receiving stream and which is projected from the most upstream point of the tributary mouth to the opposite bank of the receiving stream. (See Figure 1)

Figure 1. Stream boundary line

(4) Work within two hundred (200) feet landward of the State’s ordinary high water line in waters of the U.S. listed as "submit application" or "closed" is not authorized by the Washington Department of Fish and Wildlife (WDFW). Site review and a specific written authorization (and State HPA) are required for these state waters.

(5) Lakes do not include impoundments of the Columbia or Snake Rivers.

(6) These “approved work windows” are based on best available information as of the date of the Services’ concurrence with this informal consultation. They may be amended or deleted in the future as new information is obtained. The Corps will use the most current version of these windows when the authorizing projects for which conformance with the ESA is in part based on the windows in this programmatic consultation.

WATERCOURSE GENERAL WORK

WINDOW

SPECIFIC LAKE WORK WINDOW

Columbia River

--mouth to Snake River November 1 – February 28 --Snake River to Priest

Rapids Dam August 1 – August 31

--above Priest Rapids Dam

July 1 – August 31

Snake River August 1 – August 31 All Lakes (except Lake Washington system and Lake Chelan)

July 1 – August 15

Lake Washington Ship Canal (upstream of the Chittenden Locks to the east end of the Mountlake Cut)

October 1-April 15

Lake Washington South of I-90 --within 1 mile of Mercer

Slough or Cedar River July 16-July 31 and November 16-December 31

--further than 1 mile from Mercer Slough or Cedar River

July 16-December 31

Between I-90 & SR 520 July 16-April 30 North of SR 520 --Between SR 520 & a line drawn due west from Arrowhead Point

July 16-March 15

--North of a line drawn due west from Arrowhead Point

July 16-July 31 and November 16-February 1

Sammamish River July 16-July 31 and November 16-February 1

Lake Sammamish --further than 1/2 mile of

Issaquah Creek July 16-December 31

--within 1/2 mile of Issaquah Creek

July 16-July 31 and November 16-December 31

Lake Chelan December 1-May 15 [if the work is done in-the-dry and the lake level is lower than 1,094 feet (NGVD) when the work is performed] and July 1-August 15

All watercourses, including tributaries, within National Park boundaries

Submit Application