OLYMPIA - State shellfish managers have approved a four-day razor clam dig starting March 28 and scheduled tentative dates for additional openings in April.

The Washington Department of Fish and Wildlife (WDFW) approved the late-March dig after marine toxin test showed the clams are safe to eat.

Twin Harbors beach will be open for morning razor clam digging March 28-31. Long Beach, Copalis and Mocrocks will be open to digging March 29-30.

No digging will be allowed at any beach after noon. The schedule, along with morning low tides, is:

March 28, Thurs., 7:57 a.m., -0.3 ft., Twin Harbors
March 29, Fri., 8:40 a.m., -0.6 ft., Twin Harbors, Long Beach, Copalis, Mocrocks
March 30, Sat., 9:26 a.m., -0.7 ft., Twin Harbors, Long Beach, Copalis, Mocrocks
March. 31, Sun., 10:16 a.m., -0.6 ft., Twin Harbors

By law, clam diggers are limited to 15 razor clams per day, and are required to keep the first 15 clams they dig. Each digger's clams must be kept in a separate container.

All diggers age 15 or older must have an applicable 2012-13 fishing license to harvest razor clams on any beach. Licenses, ranging from a three-day razor clam license to an annual combination fishing license, are available on WDFW's website at https://fishhunt.dfw.wa.gov and from license vendors around the state.

Meanwhile, WDFW has tentatively scheduled two morning digs in April, subject to favorable marine toxin tests. Final word on these digs will be posted on WDFW's website at http://wdfw.wa.gov/fishing/shellfish/razorclams/current.html.

Dan Ayres, WDFW coastal shellfish manager, reminds diggers they will need to purchase a 2013-14 license to participate in the April openings, since current fishing licenses expire at midnight March 31. Licenses are available online ( https://fishhunt.dfw.wa.gov/ ), by phone (1-866-320-9933) and from license dealers around the state.

Tentative opening dates in April, along with morning low tides, are:

April 9, Tues., 6:39 a.m., 0.0 ft., Twin Harbors
April 10, Wed., 7:19 a.m., -0.3 ft., Twin Harbors
April 11, Thurs., 7:57 a.m., -0.4 ft., Twin Harbors
April 12, Fri., 8:34 a.m., -0.4 ft., Twin Harbors, Long Beach, Copalis and Mocrocks
April 13, Sat., 9:11 a.m., -0.2, ft., Twin Harbors, Long Beach, Copalis and Mocrocks
April 14, Sun., 9:49 a.m., +0.1, ft., Twin Harbors, Long Beach, Copalis and Mocrocks
April 24, Wed., 6:10 a.m., -0.3 ft., Twin Harbors
April 25, Thurs., 6:54 a.m., -1.0 ft., Twin Harbors
April 26, Fri., 7:38 a.m., -1.5 ft., Twin Harbors, Long Beach, Copalis and Mocrocks
April 27, Sat., 8:24 a.m., -1.7 ft., Twin Harbors, Long Beach, Copalis and Mocrocks
April 28, Sun., 9:11 a.m., -1.7 ft., Twin Harbors, Long Beach, Copalis and Mocrocks
April 29, Mon., 10:01 a.m., -1.5 ft., Twin Harbors, Long Beach and Mocrocks
April 30, Tues., 10:55 a.m., -1.0 ft., Twin Harbors