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Qualified graders at WWPA mills are authorized to use officials grade stamps issued by WWPA. Each mill is assigned a mill number, which is included only on stamps authorized to be used by the mill. The following mills are authorized by Association to use WWPA grade stamps.
As of April 8, 20087 Stimson Lumber Company, Bonner, MT
10 Collins Pine Company, Chester, CA
17 Hampton Lumber Mills-Cowlitz Div., Morton, WA
18 Hampton Lumber Mills-Cowlitz Div., Randle, WA
19 Hampton Lumber Mills-Darrington Div., Darrington, WA
20 Sierra Pacific Industries, Camino, CA
32 Stimson Plummer, Plummer, ID
34 Warm Springs Forest Products Ind., Warm Springs, OR
38 Simpson Timber - Tacoma
40 Rosboro Lumber Company, Springfield, OR
43 Stimson Lumber Company, Libby, MT
47 Boise Cascade, LaGrande, OR
50 Riley Creek Lumber Company, Chilco, ID
52 Potlatch Corporation, Lewiston, ID
53 Potlatch Corporation, St. Maries, ID
63 Simpson Timber Company, Longview, WA
65 Sierra Pacific Industries, Sonora, CA
68 Teal-Jones Group, Sumas, WA
69 Fremont Sawmill, Lakeview, OR
70 Sierra Pacific Industries, Centralia, WA
71 Riley Creek Lumber Company, Moyie Springs, ID
77 Colville Indian Precision Pine Co., Omak, WA
78 Stimson Lumber Company/Stimson-Hauser, Post Falls, ID
87 Malheur Lumber Company, John Day, OR
91 Sierra Pacific Industries, Burney, CA
92 Bennett Forest Industries, Inc., Grangeville, ID
94 Sierra Pacific Industries, Aberdeen, WA
97 Zosel Lumber Company, Oroville, WA
98 Sierra Pacific Industries, Mt. Vernon, WA
104 Kinzua Resources L.L.C., Pilot Rock, OR
115 Interfor Pacific, Inc., Port Angeles, WA
116 Hills Products Group, Spearfish, SD
121 Interfor Pacific, Inc., Gilchrist, OR
123 Interfor Pacific, Inc., Molalla, OR
128 Stimson Lumber Company, Clatskanie, OR
129 F. H. Stoltze Land & Lumber Co., Columbia Falls, MT
134 Stimson Lumber Company, Priest River, ID
144 Columbia Vista Corporation, Vancouver, WA
146 Boise Cascade, Kettle Falls, WA
149 Yakama Forest Products, White Swan, WA
150 C & D Lumber Company, Riddle, OR
152 Tillamook Lumber Company, Tillamook, OR
153 Sun Mountain Lumber, Deer Lodge, MT
155 Idaho Veneer Company, Post Falls, ID
157 Rushmore Forest Products, Inc., Hill City, SD
159 Gang-Nail Truss Company of Visalia, Inc., Visalia, CA
162 Swanson-Superior, LLC., Noti, OR
165 Boise Cascade, White City, OR
167 Stimson Tillamook, Tillamook, OR
169 Swanson Group - Superior Studs, Roseburg, OR
174 Swanson Group - Superior Studs, Glide, OR
177 Swanson Group - Superior Lumber, Glendale, OR
183 Sierra Forest Products, Terra Bella, CA
187 Pope & Talbot, Inc., Spearfish, SD
202 Sierra Pacific Industries, Lincoln, CA
206 Cedar River Forest Products, Chehalis, WA
209 Trumark Industries, Inc., Spokane, WA
212 Stimson Lumber Company, Colville, WA
214 Mid Columbia Lumber & Box Co., Inc., Madras, OR
218 Guy Bennett Lumber Company, Clarkston, WA
226 Stimson Lumber Company (DeArmond Div.), Coeur d'Alene, ID
233 WasteKnot Recycling, Phoenix, AZ
236 Sierra Pacific Industries, Anderson, CA
237 Blue Mt. Lumber Products, LLC, Pendleton, OR
239 Mescalero Forest Products, Mescalero, NM
241 Pyramid Mountain Lumber, Inc., Seeley Lake, MT
249 Plum Creek Manufacturing, L.P., Fortine, MT
260 Fort Apache Timber Company, Whiteriver, AZ
261 Plum Creek Manufacturing, L.P., Kalispell, MT
262 Unity Forest Products, Yuba City, CA
266 Mason County Forest Products, Shelton, WA
272 Shasta Green, Inc., Burney, CA
275 Pleasant Logging & Mill, Inc., Monte Vista, CO
282 Eagle Stud Mill, Inc., Hall, MT
283 Boise Cascade, Elgin, OR
284 Precision Pine & Timber, Inc., Heber, AZ
287 Filler King Company, Homedale, ID
292 Schuck Component Systems, Inc., Glendale, AZ
293 Sierra Pacific Industries, Richfield, CA
295 Little River, Inc., Hoquiam, WA
296 All Coast Forest Products, Englewood, CO
302 SDS Lumber Company, Bingen, WA
303 Simpson Timber Company, Shelton, WA
311 Lucas Lumber, Inc., Ogden, UT
330 T & T Forest Products, New Plymouth, ID
332 Plum Creek Manufacturing, L.P., Pablo, MT
338 Stimson Lumber Company, Forest Grove, OR
343 Vaagen Brothers Lumber, Inc., Colville, WA
344 Bighorn Lumber Company, Inc., Laramie, WY
349 Canyon Lumber Company, Inc., Everett, WA
353 Rainier Wood Products, Sweet Home, OR
354 Caliber Forest Products, Turner, OR
357 Devil's Tower Forest Products, Hulett, WY
358 Bennett Lumber Products, Inc., Princeton, ID
359 Sauvola Lumber, Northport, WA
367 Dancer Lumber Company, Camas Valley, OR
369 Fox Companies, Hamilton, MT
376 Shaniko Forest Products Inc., Scio, OR
385 Sierra Pacific Industries, Shasta Lake City, CA
386 Sturgis Sawmill, Sturgis, SD
387 Sierra Pacific Industries, Quincy, CA
388 Seattle-Tacoma Box Company, Kent, WA
408 Willamina Lumber Company, Willamina, OR
415 Thompson River Lbr. Co. of Montana, Thompson Falls, MT
422 Plum Creek Manufacturing, L.P., Columbia Falls, MT
426 Riley Creek Lumber Company, Laclede, ID
496 Whiteman Lumber Company, Inc., Cataldo, ID
568 Thomas Lumber Company, Klamath Falls, OR
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