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(continued)
hvij = habitat vulnerability for a particular habitat type & oil effect;
j = habitat type;
i = acute toxicity (AT), mechanical injury (MI) and persistence (PER); and
n = number of habitats to be considered as determined under (a) and (b) of this subsection.
(d) The final HVSAT, HVSMI, and HVSPER scores are found by rounding the raw scores calculated from the formula in (c) of this subsection to the nearest 0.01 as follows: Decimals less than 0.005 shall be rounded down and decimals equal to or greater than 0.005 shall be rounded up.
[Statutory Authority: Chapter 90.48 RCW. 92-10-005 (Order 91-13), § 173-183-410, filed 4/23/92, effective 5/24/92.]
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173-183-420
Marine bird vulnerability.
(1) Each of the marine and estuarine subregions of state waters established in WAC 173-183-400(2) is relatively ranked and scored for marine bird vulnerability to oil spills on a 1 to 5 scale for each season, where a score of 5 represents the greatest vulnerability and a score of 1 represents the least vulnerability.
(2) The marine bird vulnerability ranking relatively ranks the vulnerability of seabirds, shorebirds, and waterfowl present in a subregion during a particular season to oil spills, where vulnerability is based on population status, abundance, roosting habits, escape behavior, flocking behavior, feeding specialization, population size, reproductive capacity, breeding dispersion, winter dispersion, seasonal exposure to waters where oil spills could occur, and significance of Washington population to total population.
(3) Marine bird seasonal vulnerability scores for each of the marine and estuarine subregions defined in WAC 173-183-400 are based on existing information and determinations made by the marine bird subcommittee of the scientific advisory board. For purposes of RCW 90.48.366, marine bird seasonal vulnerability scores (BVS) for each of the subregions defined in WAC 173-183-400 shall be as follows:
Table 4. Subregional Marine Bird Vulnerability Scores (BVS)
SUBREGION SP SU FA WI
101 NORTHERN OUTER COAST 5 5 5 5
102 KALALOCH 5 5 5 5
103 QUINAULT 5 5 5 5
104 COPALIS BEACH 5 5 5 5
105 GRAYS HARBOR 5 5 5 5
106 TWIN HARBORS BEACH 5 5 5 5
107 WILLAPA BAY 5 5 5 5
108 LONG BEACH 5 5 5 5
109 INNER SHELF 4 2 5 5
110 OUTER SHELF 4 1 1 1
111 SHELF EDGE 5 1 1 1
112 CONTINENTAL SLOPE 2 1 1 1
201 STRAIT OF JUAN DE FUCA-OUTER 3 2 5 4
203 CAPE FLATTERY 4 3 4 3
204 NEAH BAY 2 2 2 2
205 NEAH BAY TO CLALLAM BAY 2 3 3 2
206 CLALLAM BAY 2 2 2 2
207 CLALLAM BAY TO CRESCENT BAY 2 3 3 2
208 CRESCENT BAY 2 2 2 2
209 CRESCENT BAY TO EDIZ HOOK 2 2 2 4
301 STRAIT OF JUAN DE FUCA-INNER 3 3 3 4
302 EDIZ HOOK 1 1 1 1
303 PORT ANGELES 2 3 3 2
304 VOICE OF AMERICA 2 2 2 2
305 DUNGENESS SPIT 2 2 2 3
306 DUNGENESS BAY/HARBOR 4 2 2 3
307 JAMESTOWN 5 5 5 5
308 SEQUIM BAY 2 1 1 2
309 MILLER PENINSULA 2 2 2 3
310 PROTECTION ISLAND 4 5 5 3
311 DISCOVERY BAY 3 1 1 4
312 QUIMPER PENINSULA 2 3 3 4
313 WHIDBEY ISLAND 1 2 2 2
314 SMITH ISLAND 3 5 5 3
315 DECEPTION PASS 2 2 2 2
316 LOPEZ ISLAND (SOUTH SHORE) 5 4 4 3
317 SAN JUAN IS. (SOUTH SHORE) 2 2 2 2
401 ADMIRALTY INLET 3 5 5 2
402 SOUTH ADMIRALTY INLET 2 1 2 3
403 PORT TOWNSEND 3 2 3 4
404 OAK BAY 2 2 2 2
405 KILISUT HARBOR 3 2 3 4
501 BELLINGHAM CHANNEL 2 2 4 4
502 GUEMES CHANNEL 2 2 1 3
503 FIDALGO BAY 2 2 2 3
504 PADILLA BAY 5 5 4 5
505 SAMISH BAY 5 5 4 5
506 BELLINGHAM BAY 4 4 4 5
507 HALE PASSAGE 3 3 2 2
601 LUMMI BAY 5 5 3 4
602 CHERRY POINT 5 5 2 2
603 BIRCH BAY 4 4 3 3
604 SEMIAHOO SPIT 4 4 4 4
605 DRAYTON HARBOR 3 3 3 4
607 SAN JUAN IS.-NORTHERN TIER 3 3 2 4
608 GEORGIA STRAIT-EASTERN 4 4 4 4
701 PT. ROBERTS 4 4 2 4
703 GEORGIA STRAIT-WESTERN 2 2 2 2
801 NORTHERN HARO STRAIT 2 2 4 3
802 SOUTHERN HARO STRAIT 1 1 1 2
901 SOUTHERN ROSARIO STRAIT 3 3 3 5
902 CENTRAL ROSARIO STRAIT 3 3 5 4
903 NORTHERN ROSARIO STRAIT 5 5 5 4
1001 PRESIDENT CHANNEL 2 2 2 2
1002 NORTHERN AREAS 1 1 2 3
1101 SPEIDEN CHANNEL 1 1 2 2
1102 NORTHERN SAN JUAN CHANNEL 1 1 1 1
1103 SOUTHERN SAN JUAN CHANNEL 1 1 2 3
1104 WASP PASS 1 1 1 2
1105 UPRIGHT CHANNEL 1 1 2 2
1106 HARNEY CHANNEL 1 1 1 2
1107 OBSTRUCTION PASS 2 2 3 2
1108 THATCHER PASS 1 1 1 1
1201 MOSQUITO/ROCHE COMPLEX 2 2 2 3
1202 FRIDAY HARBOR 2 2 2 2
1203 GRIFFIN BAY 2 2 2 3
1205 FISHERMAN BAY 2 2 2 3
1206 SWIFTS/SHOAL BAYS 2 2 2 2
1207 DEER HARBOR 2 2 2 2
1208 WEST SOUND 1 1 2 2
1209 EAST SOUND 2 2 1 2
1210 LOPEZ SOUND 2 2 3 4
1401 SKAGIT BAY 5 3 2 1
1402 PENN COVE/CRESCENT HARBOR 5 3 2 1
1403 SARATOGA PASSAGE 5 1 2 2
1404 HOLMES HARBOR 4 2 3 3
1405 PORT SUSAN 3 1 1 1
1406 POSSESSION SOUND 3 1 2 2
1501 HOOD CANAL ENTRANCE 2 1 2 3
1502 PORT LUDLOW 2 2 2 2
1503 PORT GAMBLE 2 2 2 2
1504 NORTHERN HOOD CANAL 2 1 2 2
1505 CENTRAL HOOD CANAL 2 1 2 2
1506 DABOB BAY 2 1 2 3
1507 QUILCENE BAY 2 2 2 2
1508 SOUTHCENTRAL HOOD CANAL 2 1 2 3
1509 ANNAS BAY 2 2 2 2
1510 GREAT BEND 3 1 3 5
1601 N. PUGET SOUND 4 1 2 2
1602 N. CENTRAL PUGET SOUND 2 1 2 2
1603 CENTRAL PUGET SOUND 2 1 2 2
1604 ELLIOT BAY 2 2 2 1
1605 EAST PASSAGE 2 1 2 2
1606 COLVOS PASSAGE 2 1 2 2
1607 COMMENCEMENT BAY 2 2 2 2
1608 NARROWS 3 2 3 4
1609 STEILACOOM 2 1 2 3
1610 NISQUALLY 2 1 2 3
1611 TREBLE-JOHNSON 2 2 2 2
1612 HALE PASSAGE 3 2 3 3
1613 CARR INLET 3 1 3 4
1614 PITT PASSAGE 2 2 2 2
1615 DRAYTON HARBOR 2 2 2 2
1616 CASE INLET 2 1 2 3
1617 HENDERSON INLET 2 2 2 1
1618 DANA PASSAGE 2 2 2 1
1619 BUDD INLET 2 2 2 2
1620 ELD INLET 2 2 2 2
1621 TOTTEN INLET 2 2 2 2
1622 PICKERING PASSAGE 2 2 2 2
1623 PEALE PASSAGE 2 2 2 1
1624 SQUAXIN 2 2 2 2
1625 SKOOKUM INLET 2 2 2 2
1626 HAMMERSLEY INLET 2 2 2 2
1627 OAKLAND BAY 2 2 2 2
1628 AGATE PASSAGE 2 2 2 2
1629 LIBERTY BAY 3 2 3 3
1630 PORT ORCHARD 2 2 2 2
1631 SINCLAIR INLET 3 2 3 3
1632 DYES INLET 2 2 2 2
1633 RICH PASSAGE 2 2 2 2
1634 QUARTERMASTER HARBOR 3 2 3 3
1635 DALCO PASSAGE 2 2 2 2
1636 BALCH PASS 2 2 2 2
(4) The marine bird vulnerability score for a spill shall be multiplied by 1.5 when any number of state or federal threatened or endangered marine birds are exposed to spilled oil.
[Statutory Authority: Chapter 90.48 RCW. 92-10-005 (Order 91-13), § 173-183-420, filed 4/23/92, effective 5/24/92.]
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173-183-430
Marine fisheries vulnerability.
(1) Each of the subregions designated in WAC 173-183-430 is relatively ranked and scored for marine fisheries vulnerability to oil spills on a 1 to 5 scale for each season where 5 represents the most vulnerable ranking and 1 represents the least vulnerable ranking.
(2) The marine fisheries vulnerability ranking relatively ranks the vulnerability of marine fisheries species present in a subregion to oil spills, where vulnerability is based on habitat preference, population status, abundance, fecundity, and sensitivity of life stages.
(3) Marine fisheries seasonal vulnerability scores for each of the marine and estuarine subregions are based on existing information and recommendations of the marine fisheries subcommittee. For purposes of RCW 90.48.366 marine fisheries seasonal vulnerability ranking scores (MFVS) for the subregions defined in WAC 173-183-400 are as follows:
Table 5. Subregional Marine Fisheries Vulnerability Scores (MFVS)
SUBREGION SEASON
SP SU FA WI
101 NORTHERN OUTER COAST 5 3 3 5
102 KALALOCH 5 3 3 5
103 QUINAULT 5 3 3 5
104 COPALIS BEACH 5 3 3 5
105 GRAYS HARBOR 5 5 5 5
106 TWIN HARBORS BEACH 5 3 3 4
107 WILLAPA BAY 5 5 5 5
108 LONG BEACH 5 3 3 4
109 INNER SHELF 5 3 3 4
110 OUTER SHELF 4 2 2 4
111 SHELF EDGE 4 1 2 3
112 CONTINENTAL SLOPE 2 1 1 1
201 STRAIT OF JUAN DE FUCA-OUTER 5 3 3 4
203 CAPE FLATTERY 5 3 3 4
204 NEAH BAY 5 3 3 4
205 NEAH BAY TO CLALLAM BAY 5 3 3 4
206 CLALLAM BAY 5 3 3 4
207 CLALLAM BAY TO CRESCENT BAY 5 3 3 4
208 CRESCENT BAY 5 3 3 4
209 CRESCENT BAY TO EDIZ HOOK 5 3 3 4
301 STRAIT OF JUAN DE FUCA-INNER 5 3 3 4
302 EDIZ HOOK 5 3 3 4
303 PORT ANGELES 5 3 3 4
304 VOICE OF AMERICA 5 3 3 4
305 DUNGENESS SPIT 5 3 3 4
306 DUNGENESS BAY/HARBOR 5 3 3 4
307 JAMESTOWN 5 3 3 4
308 SEQUIM BAY 5 3 3 4
309 MILLER PENINSULA 5 3 3 4
310 PROTECTION ISLAND 5 3 3 4
311 DISCOVERY BAY 5 3 3 4
312 QUIMPER PENINSULA 5 3 3 4
313 WHIDBEY ISLAND 5 3 3 4
314 SMITH ISLAND 5 3 3 4
315 DECEPTION PASS 5 3 3 4
316 LOPEZ ISLAND (SOUTH SHORE) 5 3 3 4
317 SAN JUAN ISLAND (SOUTH SHORE) 5 3 3 4
401 ADMIRALTY INLET 5 4 3 5
402 SOUTH ADMIRALTY INLET 5 4 3 5
403 PORT TOWNSEND 5 4 3 5
404 OAK BAY 5 4 3 5
405 KILISUT HARBOR 5 4 3 5
501 BELLINGHAM CHANNEL 5 4 3 5
502 GUEMES CHANNEL 5 4 3 5
503 FIDALGO BAY 5 4 3 5
504 PADILLA BAY 5 4 3 5
505 SAMISH BAY 5 3 3 5
506 BELLLINGHAM BAY 5 3 3 5
507 HALE PASSAGE 5 3 3 5
601 LUMMI BAY 5 3 3 5
602 CHERRY POINT 5 3 3 5
603 BIRCH BAY 5 3 3 5
604 SEMIAHOO SPIT 5 3 3 5
605 DRAYTON HARBOR 5 3 3 5
607 SAN JUAN ISLANDS-NORTHERN TIER 5 3 3 4
608 GEORGIA STRAIT-EASTERN 5 3 3 5
701 PT. ROBERTS 5 3 3 5
703 GEORGIA STRAIT-WESTERN 5 3 3 5
801 NORTHERN HARO STRAIT 5 3 3 4
802 SOUTHERN HARO STRAIT 5 3 3 4
901 SOUTHERN ROSARIO STRAIT 5 3 3 4
902 CENTRAL ROSARIO STRAIT 5 3 3 4
903 NORTHERN ROSARIO STRAIT 5 3 3 4
1001 PRESIDENT CHANNEL 5 3 3 4
1002 NORTHERN AREAS 5 3 3 4
1101 SPEIDEN CHANNEL 5 3 3 4
1102 NORTHERN SAN JUAN CHANNEL 5 3 3 4
1103 SOUTHERN SAN JUAN CHANNEL 5 3 3 4
1104 WASP PASS 5 3 3 4
1105 UPRIGHT CHANNEL 5 3 3 4
1106 HARNEY CHANNEL 5 3 3 4
1107 OBSTRUCTION PASS 5 3 3 4
1108 THATCHER PASS 5 3 3 4
1201 MOSQUITO/ROCHE COMPLEX 5 3 3 4
1202 FRIDAY HARBOR 5 3 3 4
1203 GRIFFIN BAY 5 3 3 4
1205 FISHERMAN BAY 5 3 3 4
1206 SWIFTS/SHOAL BAYS 5 3 3 4
1207 DEER HARBOR 5 3 3 4
1208 WEST SOUND 5 3 3 4
1209 EAST SOUND 5 3 3 4
1210 LOPEZ SOUND 5 3 3 4
1401 SKAGIT BAY 5 4 3 5
1402 PENN COVE /CRESCENT HARBOR 5 4 3 5
1403 SARATOGA PASSAGE 5 4 3 5
1404 HOLMES HARBOR 5 4 3 5
1405 PORT SUSAN 5 4 3 5
1406 POSSESSION SOUND 5 4 3 5
1501 HOOD CANAL ENTRANCE 2 1 1 2
1502 PORT LUDLOW 2 1 1 2
1503 PORT GAMBLE 2 1 1 2
1504 NORTHERN HOOD CANAL 2 1 1 2
1505 CENTRAL HOOD CANAL 2 1 1 2
1506 DABOB BAY 2 1 1 2
1507 QUILCENE BAY 2 1 1 2
1508 SOUTHCENTRAL HOOD CANAL 2 1 1 2
1509 ANNAS BAY 2 1 1 2
1510 GREAT BEND 2 1 1 2
1601 N. PUGET SOUND 5 4 3 5
1602 N. CENTRAL PUGET SOUND 5 4 3 5
1603 CENTRAL PUGET SOUND 5 4 3 5
1604 ELLIOT BAY 5 4 3 5
1605 EAST PASSAGE 4 3 2 3
1606 COLVOS PASSAGE 4 3 2 3
1607 COMMENCEMENT BAY 4 3 2 3
1608 NARROWS 4 3 2 3
1609 STEILACOOM 4 3 2 3
1610 NISQUALLY 4 3 2 3
1611 TREBLE-JOHNSON 4 3 2 3
1612 HALE PASSAGE 4 3 2 3
1613 CARR INLET 4 3 2 3
1614 PITT PASSAGE 4 3 2 3
1615 DRAYTON HARBOR 4 3 2 3
1616 CASE INLET 4 3 2 3
1617 HENDERSON INLET 4 3 2 3
1618 DANA PASSAGE 4 3 2 3
1619 BUDD INLET 4 3 2 3
1620 ELD INLET 4 3 2 3
1621 TOTTEN INLET 4 3 2 3
1622 PICKERING PASSAGE 4 3 2 3
1623 PEALE PASSAGE 4 3 2 3
1624 SQUAXIN 4 3 2 3
1625 SKOOKUM INLET 4 3 2 3
1626 HAMMERSLEY INLET 4 3 2 3
1627 OAKLAND BAY 4 3 2 3
1628 AGATE PASSAGE 5 4 3 5
1629 LIBERTY BAY 5 5 5 5
1630 PORT ORCHARD 5 5 5 5
1631 SINCLAIR INLET 5 5 5 5
1632 DYES INLET 5 5 5 5
1633 RICH PASSAGE 5 5 5 5
1634 QUARTERMASTER HARBOR 4 3 2 3
1635 DALCO PASSAGE 4 3 2 3
1636 BALCH PASS 4 3 2 3
[Statutory Authority: Chapter 90.48 RCW. 92-10-005 (Order 91-13), § 173-183-430, filed 4/23/92, effective 5/24/92.]
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173-183-440
Shellfish vulnerability.
(1) Each of the subregions designated in WAC 173-183-430 is relatively ranked and scored for shellfish vulnerability to oil spills on a 1 to 5 scale for each season where 5 represents the most vulnerable ranking and 1 represents the least vulnerable ranking.
(2) Shellfish vulnerability ranking relatively ranks the vulnerability of shellfish present in a subregion to oil spills, where vulnerability is based on habitat preference, population status, abundance, fecundity, and sensitivity of life stages.
(3) Shellfish seasonal vulnerability scores for each of the marine and estuarine subregions are based on existing information and recommendations of the shellfish subcommittee of the scientific advisory board. For purposes of RCW 90.48.366 shellfish seasonal vulnerability ranking scores (SFVS) for the subregions defined in WAC 173-183-400 are as follows:
Table 6. Shellfish Vulnerability Scores (SFVS)
Region/Subregion SP SU FA WI
101 4 4 4 4
102 5 5 5 5
103 3 3 3 3
104 4 4 4 4
105 2 2 2 2
106 3 3 2 2
107 4 4 4 4
108 4 3 3 3
109 5 5 5 5
110 1 1 1 1
111 1 1 1 1
112 1 1 1 1
2 5 5 5 5
3 5 5 5 5
401 2 1 1 2
402 3 3 3 3
403 4 4 3 4
404 3 3 3 3
405 4 4 3 4
5 5 5 5 5
6 5 5 4 5
7 5 5 4 5
8 4 3 3 4
9 4 3 3 4
1 4 3 3 4
11 4 3 3 4
12 4 3 3 4
1401 2 3 3 2
1402 1 1 1 1
1403 1 1 1 1
1404 1 1 1 1
1405 1 2 2 1
1406 1 2 2 1
1501 2 2 2 2
1502 2 2 2 2
1503 2 2 2 2
1504 3 3 2 2
1505 3 3 2 2
1506 3 3 2 2
1507 3 3 2 2
1508 3 4 3 3
1509 3 4 3 3
1510 3 4 3 3
1601 2 2 2 2
1602 2 2 2 2
1603 2 2 2 2
1604 2 2 2 2
1605 2 2 2 2
1606 2 2 2 2
1607 2 2 2 2
1608 2 1 1 2
1609 5 5 5 5
1610 5 5 5 5
1611 5 5 5 5
1612 5 5 5 5
1613 5 5 5 5
1614 5 5 5 5
1615 5 5 5 5
1616 5 5 4 5
1617 5 5 5 5
1618 1 1 1 1
1619 4 5 4 4
1620 4 5 4 4
1621 4 5 4 4
1622 5 5 4 5
1623 4 5 4 4
1624 4 5 4 4
1625 4 5 4 4
1626 4 5 4 4
1627 4 5 4 4
1628 4 3 3 3
1629 4 3 3 3
1630 4 3 3 3
1631 4 3 3 3
1632 4 3 3 3
1633 4 3 3 3
1634 2 2 2 2
1635 2 2 2 2
1636 5 5 5 5
(4) The shellfish vulnerability score for a spill shall be multiplied by 1.5 when any number of individuals of state or federal threatened or endangered shellfish species are exposed to spilled oil.
[Statutory Authority: Chapter 90.48 RCW. 92-10-005 (Order 91-13), § 173-183-440, filed 4/23/92, effective 5/24/92.]
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173-183-450
Salmon vulnerability.
(1) The salmon vulnerability ranking is based on seasonal habitat preference of juveniles during outmigration, adults as they return to spawn and the presence of oil in river mouths during peak occurrence of salmon runs. The salmon vulnerability ranking was developed from existing information and determinations of the salmon subcommittee of the scientific advisory board. In the case of Chinook salmon, habitat preference differs for subyearlings and yearlings.
(2) The vulnerability of five salmon species in nine habitats are relatively scored for vulnerability to oil spills on a 1 to 5 scale for each season, where 5 represents the most vulnerable condition, and a score of 1 represents the least vulnerable condition, as follows:
Table 7. Vulnerability of Salmon Species and/or Species Yearclass by Habitat and Season
SPECIES/YEARCLASS and SALMON VULNERABILITY HABITAT HABITAT VULNERABILITY SCORE (savs) SEASON
SP SU FA WI
Chinook (subyearling)
Intertidal
Rocky 1 1 1 1
Cobble 2 2 1 1
Gravel 3 3 2 2
Sand (vegetated) 4 5 3 3
Sand (no vegetation) 3 3 2 2
Mud (vegetated) 4 5 3 3
Mud (no vegetation) 3 3 2 3
Subtidal 2 2 1 1
Pelagic 4 4 3 3
Chinook (yearling)
Intertidal
Rocky 1 1 1 1
Cobble 3 3 2 2
Gravel 3 3 3 2
Sand (vegetated) 3 3 2 2
Sand (no vegetation) 3 3 2 2
Mud (vegetated) 3 3 2 2
Mud (no vegetation) 3 3 2 2
Subtidal 2 2 1 1
Pelagic 4 4 3 3
Coho
Intertidal
Rocky 1 1 1 1
Cobble 3 2 2 2
Gravel 3 4 2 2
Sand (vegetated) 5 4 3 4
Sand (no vegetation) 3 2 2 3
Mud (vegetated) 5 4 3 4
Mud (no vegetation) 3 4 2 3
Subtidal 2 2 1 1
Pelagic 4 4 3 3
Pink
Intertidal
Rocky 1 1 1 1
Cobble 2 1 1 1
Gravel 3 1 1 3
Sand (vegetated) 5 2 2 5
Sand (no vegetation) 3 2 2 3
Mud (vegetated) 5 2 2 5
Mud (no vegetation) 3 1 1 3
Subtidal 2 1 1 1
Pelagic 4 2 2 2
Chum
Intertidal
Rocky 1 1 1 1
Cobble 2 1 1 1
Gravel 3 2 2 3
Sand (vegetated) 5 3 2 5
Sand (no vegetation) 3 2 2 3
Mud (vegetated) 5 4 2 5
Mud (no vegetation) 3 2 2 3
Subdtidal 2 2 1 1
Pelagic 4 4 2 2
Sockeye
Intertidal
Rocky 2 2 1 1
Cobble 2 1 1 1
Gravel 2 1 1 1
Sand (vegetated) 2 1 1 1
Sand (no vegetation) 2 1 1 1
Mud (vegetated) 2 1 1 1
Mud (no vegetation) 3 1 1 1
Subtidal 1 2 1 1
Pelagic 4 4 2 2
The habitat-types classified under WAC 173-183-400 correlate with the habitats listed in Table 7 as follows:
TABLE. 8. KEY TO TRANSLATINC MARINE/ESTUARINE HABITAT TYPES CLASSIFIED UNDER WAC 173-183-410 TO SALMON VULNERABILITY HABITATS
MARINE/ESTUARINE HABITAT TYPE from WAC 173-183-410(3) EQUIVALENT SALMON VULNERABILITY HABITAT
Marine Intertidal, exposed and semiexposed rocky shores Intertidal, rocky
Marine Intertidal, sand-scoured rocky shores Intertidal, rocky
Marine Intertidal, protected rocky shores Intertidal, rocky
Estuarine Intertidal, open rocky shores Intertidal, rocky
Marine Intertidal, semiexposed cobble and mixed-course beaches Intertidal, cobble
Estuarine Intertidal, open mixed-course beaches Intertidal, cobble
Marine Intertidal, semiexposed gravel beaches Intertidal, gravel
Estuarine Intertidal, open gravel beaches Intertidal, gravel
Marine Intertidal, exposed sandy beaches Intertidal, sand (presence of vegetation will be determined at the time of the spill)
Marine Intertidal, semiprotected mixed-fine beaches Intertidal, sand (presence of vegetation will be determined at the time of the spill)
MARINE/ESTUARINE HABITAT TYPE from WAC 173-183-410(3) EQUIVALENT SALMON VULNERABILITY HABITAT
Estuarine Intertidal, open sandy beaches Intertidal, sand (presence of vegetation will be determined at the time of the spill)
Estuarine Intertidal, sandy low marshes Intertidal, sand (presence of vegetation will be determined at the time of the spill)
Estuarine Intertidal, mixed-fine beaches and low marshes Intertidal, sand (presence of vegetation will be determined at the time of the spill)
Marine Intertidal, protected mud flats Intertidal, mud (presence of vegetation will be determined at the time of the spill)
Estuarine Intertidal, mud flats Intertidal, mud (presence of vegetation will be determined at the time of the spill)
all Marine and Estuarine Subtidal categories except open water Subtidal
Marine Subtidal, open water Pelagic
Estuarine Subtidal, open water Pelagic
(3) For each oil spill where the compensation schedule is applied, the RDA committee shall determine the following:
(a) For spills greater than 1,000 gallons, the salmon vulnerability habitat(s) exposed to spilled oil and each habitat's percent-coverage of the total area exposed to spilled oil;
(b) For spills of less than 1,000 gallons, the salmon vulnerability habitat(s) in the subregion(s) exposed to spilled oil and the percent-coverage of these habitats in the exposed subregion(s);
(c) The season in which spill impacts will be greatest;
(d) The individual species/year class vulnerability score (SAVSi) as described in subsection (4) of this section; and
(e) The composite salmon vulnerability score for a spill (SAVSs) as described in subsection (5) of this section.
(4) From the information enumerated in subsection (2) of this section, the RDA committee shall determine the species/year class vulnerability score for a spill (SAVSi) by summing the weighted species/year class vulnerability scores for each of the salmon vulnerability habitats classified in Table 8 of subsection (2) of this section, where weighting is defined as percent-coverage of the salmon vulnerability habitats as determined in subsection (3) of this section, as follows:
SAVSi = (savs1* PCT-COV1)
(savs2* PCT-COV2) ... (savsn* PCT-COVn)
where SAVSi = salmon vulnerability score for a species/year class;
savsj = species/year class habitat vulnerability score for the season of greatest spill impact from subsection (2) of this section;
PCT-COVj = percent-coverage of habitat j from subsection (2) of this section;
i = Chinook, subyearling (Cs); Chinook, yearling (Cy); Coho (C); Pink (P); Chum (Ch); and Sockeye (So); and
n = the number of salmon vulnerabililty habitats used to calculate SAVS as determined in subsection (3) of this section.
(5) The raw salmon vulnerability score for a spill (SAVSs) shall be calculated as follows:
(a) In years when pink salmon are present in state waters. The chinook salmon spill vulnerability scores for subyearlings (SAVSCs) and yearlings (SAVSCy) as determined in subsection (4) of this section shall be averaged, then added to the spill vulnerability scores for coho (SAVSC), pink (SAVSP), chum (SAVSCh) and sockeye (SAVSSo) salmon as determined in subsection (4) of this section. The sum of these scores shall then be divided by 5, as described by the following formula:
SAVSs = [(SAVSCs SAVSCy)/2 SAVSC SAVSP SAVSCh SAVSSo]/5
where SAVSs = salmon vulnerability score for a spill;
SAVSCs = chinook, subyearling vulnerability score from subsection (4) of this section;
SAVSCy = chinook (yearling) vulnerability score from subsection (4) of this section;
SAVSC = coho salmon vulnerability score from subsection (4) of this section;
SAVSP = pink salmon vulnerability score from subsection (4) of this section;
SAVSC = chum salmon vulnerability score from subsection (4) of this section;
SAVSSo = sockeye salmon vulnerability score from subsection (4) of this section;
(b) In years when pink salmon are not present in state waters. The chinook salmon spill vulnerability scores for subyearlings (SAVSCs) and yearlings (SAVSCy) as determined in subsection (4) of this section shall be averaged, then added to the spill vulnerability scores for coho (SAVSC), chum (SAVSCh) and sockeye (SAVSSo) salmon as determined in subsection (4) of this section. The sum of these scores shall then be divided by 4, as described by the following formula:
SAVSs = [(SAVSCs SAVSCy)/2 SAVSC
SAVSCh SAVSSo]/4
where SAVSs = salmon vulnerability score for a spill;
SAVSCs = chinook, subyearling vulnerability score from subsection (4) of this section;
SAVSCy = chinook (yearling) vulnerability score from subsection (4) of this section;
SAVSC = coho salmon vulnerability score from subsection (4) of this section;
SAVSP = pink salmon vulnerability score from subsection (4) of this section;
SAVSC = chum salmon vulnerability score from subsection (4) of this section;
SAVSSo = sockeye salmon vulnerability score from subsection (4) of this section;
(6) If spilled oil enters a river mouth, SAVSi from subsection (4) of this section shall be assigned a score of 5 for each species/year class in peak occurrence in a river mouth during the period of time the spilled oil enters and remains in the river mouth. Scores of 5 determined for species/year classes under this subsection shall supersede SAVSi scores calculated under subsection (4) of this section. The RDA committee shall make determinations of whether oil enters a river mouth and whether species/year classes are in peak occurrence when spilled oil is present in a river mouth.
(7) The final SAVSs score is found by rounding the raw SAVSs score calculated in subsection (5) of this section to the nearest 0.01 as follows: Decimals less than 0.005 shall be rounded down and decimals equal to or greater than 0.005 shall be rounded up.
(8) The final salmon vulnerability score for a spill shall be multiplied by 1.5 when any number of individuals of state or federal threatened or endangered salmon races and/or runs are exposed to spilled oil.
[Statutory Authority: Chapter 90.48 RCW. 92-10-005 and 92-13-083 (Order 91-13 and 91-13A), § 173-183-450, filed 4/23/92 and 6/16/92, effective 5/24/92 and 7/17/92.]
Notes:
Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency.
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173-183-460
Marine mammal vulnerability.
(1) Each of the marine and estuarine subregions of state waters designated in WAC 173-183-400(2) is relatively ranked and scored for marine mammal vulnerability to oil spills on a 1 to 5 scale for each season where 5 represents the greatest vulnerability and 1 represents the least vulnerability.
(2) Marine mammal vulnerability ranking scores take into consideration species presence, diversity, population status, breeding vulnerability, presence of young, physiological vulnerability, primary habitat, feeding habitats and abundance.
(3) Marine mammal seasonal vulnerability scores for each of the marine and estuarine subregions of state waters are based on existing information and determinations made by the marine mammals subcommittee of the scientific advisory board. For purposes of RCW 90.48.366, marine mammal vulnerability ranking scores for subregions classified in WAC 173-183-400(2) are as follows:
Table 9. Marine Mammal Vulnerability Scores (MVS)
SEASON
SUBREGION SP SU FA WI
101 NORTHERN OUTER COAST 5 5 5 5
102 KALALOCH 5 5 5 5
103 QUINAULT 5 5 5 5
104 COPALIS BEACH 5 5 5 4
105 GRAYS HARBOR 5 4 5 4
106 TWIN HARBORS BEACH 5 5 5 4
107 WILLAPA BAY 5 5 5 4
108 LONG BEACH 5 5 5 5
109 INNER SHELF 5 5 5 5
110 OUTER SHELF 4 2 3 3
111 SHELF EDGE 4 1 3 3
112 CONTINENTAL SLOPE 1 1 1 1
201 STRAIT OF JUAN DE FUCA-OUTER 4 4 3 2
203 CAPE FLATTERY 4 4 3 2
204 NEAH BAY 4 4 3 2
205 NEAH BAY TO CLALLAM BAY 3 3 2 2
206 CLALLAM BAY 3 3 2 2
207 CLALLAM BAY TO CRESCENT BAY 3 3 2 2
208 CRESCENT BAY 3 3 2 2
209 CRESCENT BAY TO EDIZ HOOK 3 3 2 2
301 STRAIT OF JUAN DE FUCA-INNER 4 4 4 3
302 EDIZ HOOK 4 4 4 3
303 PORT ANGELES 4 4 4 3
304 VOICE OF AMERICA 4 4 4 3
305 DUNGENESS SPIT 4 4 4 3
306 DUNGENESS BAY/HARBOR 4 4 4 3
307 JAMESTOWN 4 4 4 3
308 SEQUIM BAY 4 4 4 3
309 MILLER PENINSULA 4 4 4 3
310 PROTECTION ISLAND 4 4 4 3
311 DISCOVERY BAY 4 4 4 3
312 QUIMPER PENNSULA 4 4 4 3
313 WHIDBEY ISLAND 4 4 4 3
314 SMITH ISLAND 4 4 4 3
315 DECEPTION PASS 4 4 4 3
316 LOPEZ ISLAND (SOUTH SHORE) 4 4 4 3
317 SAN JUAN ISLAND (SOUTH SHORE) 4 4 4 3
401 ADMIRALTY INLET 4 4 4 3
402 SOUTH ADMIRALTY INLET 4 4 4 3
403 PORT TOWNSEND 4 4 4 3
404 OAK BAY 4 4 4 3
405 KILISUT HARBOR 4 4 4 3
501 BELLINGHAM CHANNEL 2 3 2 2
502 GUEMES CHANNEL 2 3 2 2
503 FIDALGO BAY 2 3 2 2
504 PADILLA BAY 2 3 2 2
505 SAMISH BAY 2 3 2 2
506 BELLINGHAM BAY 2 3 2 2
507 HALE PASSAGE 2 3 2 2
601 LUMMI BAY 4 4 4 3
602 CHERRY POINT 4 4 4 3
603 BURCH BAY 4 4 4 3
604 SEMIAHOO SPIT 4 4 4 3
605 DRAYTON HARBOR 4 4 4 3
607 SAN JUAN ISLANDS-NORTHERN TIER 4 4 4 3
608 GEORGIA STRAIT-EASTERN 4 4 4 3
701 PT. ROBERTS 4 4 4 3
703 GEORGIA STRAIT-WESTERN 4 4 4 3
801 NORTHERN HARO STRAIT 5 4 4 4
802 SOUTHERN HARO STRAIT 5 4 4 4
901 SOUTHERN ROSARIO STRAIT 4 4 3 2
902 CENTRAL ROSARIO STRAIT 4 4 3 2
903 NORTHERN ROSARIO STRAIT 5 4 3 2
1001 PRESIDENT CHANNEL 5 4 4 3
1002 NORTHERN AREAS 5 4 4 3
1101 SPEIDEN CHANNEL 3 3 3 2
1102 NORTHERN SAN JUAN CHANNEL 3 3 3 2
1103 SOUTHERN SAN JUAN CHANNEL 3 3 3 2
1104 WASP PASS 3 3 3 2
1105 UPRIGHT CHANNEL 3 3 3 2
1106 HARNEY CHANNEL 3 3 3 2
1107 OBSTRUCTION PASS 3 3 3 2
1108 THATCHER PASS 3 3 3 2
1201 MOSQUITO/ROCHE COMPLEX 3 3 3 2
1202 FRIDAY HARBOR 3 3 3 2
1203 GRIFFIN BAY 3 3 3 2
1205 FISHERMAN BAY 3 3 3 2
1206 SWIFTS/SHOAL BAYS 3 3 3 2
1207 DEER HARBOR 3 3 3 2
1208 WEST SOUND 3 3 3 2
1209 EAST SOUND 3 3 3 2
1210 LOPEZ SOUND 3 3 3 2
1401 SKAGIT BAY 2 1 1 1
1402 PENN COVE/CRESCENT HARBOR 2 1 1 1
1403 SARATOGA PASSAGE 2 1 1 2
1404 HOLMES HARBOR 2 1 1 1
1405 PORT SUSAN 2 1 1 1
1406 POSSESSION SOUND 2 1 1 2
1501 HOOD CANAL ENTRANCE 1 1 1 1
1502 PORT LUDLOW 1 1 1 1
1503 PORT GAMBLE 1 1 1 1
1504 NORTHERN HOOD CANAL 1 1 1 1
1505 CENTRAL HOOD CANAL 1 1 1 1
1506 DABOB BAY 1 1 1 1
1507 QUILCENE BAY 1 1 1 1
1508 SOUTHCENTRAL HOOD CANAL 1 1 1 1
1509 ANNAS BAY 1 1 1 1
1510 GREAT BEND 1 1 1 1
1601 N. PUGET SOUND 3 2 2 2
1602 N. CENTRAL PUGET SOUND 3 2 2 2
1603 CENTRAL PUGET SOUND 2 1 1 1
1604 ELLIOT BAY 2 1 1 1
1605 EAST PASSAGE 2 1 1 1
1606 COLVOS PASSAGE 2 1 1 1
1607 COMMENCEMENT BAY 2 1 1 1
1608 NARROWS 2 1 1 1
1609 STEILACOOM 2 1 1 1
1610 NISQUALLY 2 1 1 1
1611 TREBLE-JOHNSON 2 1 1 1
1612 HALE PASSAGE 2 1 1 1
1613 CARR INLET 2 1 1 1
1614 PITT PASSAGE 2 1 1 1
1615 DRAYTON HARBOR 2 1 1 1
1616 CASE INLET 2 1 1 1
1617 HENDERSON INLET 2 1 1 1
1618 DANA PASSAGE 2 1 1 1
1619 BUDD INLET 2 1 1 1
1620 ELD INLET 2 1 1 1
1621 TOTTEN INLET 2 1 1 1
1622 PICKERING PASSAGE 2 1 1 1
1623 PEALE PASSAGE 2 1 1 1
1624 SQUAXIN 2 1 1 1
1625 SKOOKUM INLET 2 1 1 1
1626 HAMMERSLEY INLET 2 1 1 1
1627 OAKLAND BAY 2 1 1 1
1628 AGATE PASSAGE 2 1 1 1
1629 LIBERTY BAY 2 1 1 1
1630 PORT ORCHARD 2 1 1 1
1631 SINCLAIR INLET 2 1 1 1
1632 DYES INLET 2 1 1 1
1633 RICH PASSAGE 2 1 1 1
1634 QUARTERMASTER HARBOR 2 1 1 1
1635 DALCO PASSAGE 2 1 1 1
1636 BALCH PASS 2 1 1 1
(4) The marine mammal vulnerability score for a spill shall be multiplied by 1.5 when any number of state or federal threatened or endangered marine mammal species are exposed to spilled oil.
[Statutory Authority: Chapter 90.48 RCW. 92-10-005 (Order 91-13), § 173-183-460, filed 4/23/92, effective 5/24/92.]
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173-183-470
Marine and estuarine recreation vulnerability.
(1) Each of the marine and estuarine subregions of state waters designated in WAC 173-183-400(2) are relatively ranked and scored for recreation vulnerability on a 1 to 5 scale for each season where a score of 5 represents the greatest vulnerability and a score of 1 represents the least vulnerability.
(2) Recreation vulnerability ranking scores take into consideration seasonal level of participation in recreational activities, number of recreation sites and types of recreational amenities available in a subregion.
(3) Recreation vulnerability ranking scores for each of the marine and estuarine subregions of state waters in each season has been determined from existing information and recommendations of the recreation subcommittee of the scientific advisory board. For purposes of RCW 90.48.366, recreation vulnerability ranking scores (RVS) for the subregions designated in WAC 173-183-400(2) are as follows:
Table 10. Marine and Estuarine Recreation Vulnerability Scores (RVS)
SEASON
SUBREGION SP SU FA WI
101 NORTHERN OUTER COAST 5 5 5 5
102 KALALOCH 5 5 5 5
103 QUINAULT 1 1 1 1
104 COPALIS BEACH 5 5 5 5
105 GRAYS HARBOR 4 4 4 3
106 TWIN HARBORS BEACH 5 5 5 5
107 WILIAPA BAY 5 5 5 5
108 LONG BEACH 5 5 5 5
109 INNER SHELF 1 1 1 1
110 OUTER SHELF 1 1 1 1
111 SHELF EDGE 1 1 1 1
112 CONTINENTAL SLOPE 1 1 1 1
201 STRAIT OF JUAN DE FUCA-OUTER 1 1 1 1
203 CAPE FLATTERY 1 1 1 1
204 NEAH BAY 1 1 1 1
205 NEAH BAY TO CLALLAM BAY 5 5 5 4
206 CLALLAM BAY 3 4 3 2
207 CLALLAM BAY TO CRESCENT BAY 5 5 5 4
208 CRESCENT BAY 3 4 3 3
209 CRESCENT BAY TO EDIZ HOOK 4 5 4 3
301 STRAIT OF JUAN DE FUCA-INNER 1 1 1 1
302 EDIZ HOOK 3 4 3 3
303 PORT ANGELES 5 5 5 4
304 VOICE OF AMERICA 2 3 2 2
305 DUNGENESS SPIT 1 1 1 1
306 DUNGENESS BAY/HARBOR 5 5 5 4
307 JAMESTOWN 2 3 2 2
308 SEQUIM BAY 4 5 4 4
309 MILLER PENINSULA 2 3 2 2
310 PROTECTION ISLAND 1 1 1 1
311 DISCOVERY BAY 2 2 2 2
312 QUIMPER PENNSULA 3 3 2 2
313 WHIDBEY ISLAND 2 3 2 2
314 SMITH ISLAND 1 1 1 1
315 DECEPTION PASS 5 5 5 5
316 LOPEZ ISLAND (SOUTH SHORE) 4 5 4 3
317 SAN JUAN ISLAND (SOUTH SHORE) 4 5 4 3
401 ADMIRALTY INLET 5 5 5 4
402 SOUTH ADMIRALTY INLET 5 5 5 4
403 PORT TOWNSEND 3 4 3 3
404 OAK BAY 4 5 4 3
405 KILISUT HARBOR 2 2 2 2
501 BELLINGHAM CHANNEL 5 5 5 4
502 GUEMES CHANNEL 1 1 1 1
503 FIDALGO BAY 4 4 3 3
504 PADILLA BAY 5 5 5 4
505 SAMISH BAY 4 4 3 3
506 BELLINGHAM BAY 5 5 5 4
507 HALE PASSAGE 3 4 3 2
601 LUMMI BAY 1 1 1 1
602 CHERRY POINT 1 1 1 1
603 BURCH BAY 3 4 3 3
604 SEMIAHOO SPIT 3 4 3 3
605 DRAYTON HARBOR 2 2 2 2
607 SAN JUAN ISLANDS-NORTHERN TIER 5 5 5 5
608 GEORGIA STRAIT-EASTERN 1 1 1 1
701 PT. ROBERTS 3 3 3 2
703 GEORGIA STRAIT-WESTERN 1 1 1 1
801 NORTHERN HARO STRAIT 5 5 5 4
802 SOUTHERN HARO STRAIT 5 5 5 4
901 SOUTHERN ROSARIO STRAIT 5 5 5 5
902 CENTRAL ROSARIO STRAIT 4 5 4 4
903 NORTHERN ROSARIO STRAIT 4 4 4 3
1001 PRESIDENT CHANNEL 4 5 4 4
1002 NORTHERN AREAS 4 5 4 3
1101 SPEIDEN CHANNEL 3 4 3 2
1102 NORTHERN SAN JUAN CHANNEL 4 5 4 3
1103 SOUTHERN SAN JUAN CHANNEL 5 5 5 4
1104 WASP PASS 5 5 5 4
1105 UPRIGHT CHANNEL 5 5 4 4
1106 HARNEY CHANNEL 4 5 4 3
1107 OBSTRUCTION PASS 2 2 2 2
1108 THATCHER PASS 4 5 4 3
1201 MOSQUITO/ROCHE COMPLEX 3 4 3 3
1202 FRIDAY HARBOR 3 3 3 2
1203 GRIFFIN BAY 4 5 4 4
1205 FISHERMAN BAY 1 1 1 1
1206 SWIFT/SHOAL BAYS 1 1 1 1
1207 DEER HARBOR 2 2 2 2
1208 WEST SOUND 3 4 3 2
1209 EAST SOUND 4 5 4 4
1210 LOPEZ SOUND 5 5 5 4
1401 SKAGIT BAY 5 5 5 5
1402 PENN COVE/CRESCENT HARBOR 4 4 3 3
1403 SARATOGA PASSAGE 3 4 3 3
1404 HOLMES HARBOR 2 3 2 2
1405 PORT SUSAN 3 4 3 3
1406 POSSESSION SOUND 4 5 4 3
1501 HOOD CANAL ENTRANCE 4 5 4 3
1502 PORT LUDLOW 4 4 4 3
1503 PORT GAMBLE 1 1 1 1
1504 NORTHERN HOOD CANAL 1 1 1 1
1505 CENTRAL HOOD CANAL 4 4 3 3
1506 DABOB BAY 4 5 4 3
1507 QUILCENE BAY 3 3 2 2
1508 SOUTHCENTRAL HOOD CANAL 4 5 4 3
1509 ANNAS BAY 4 4 4 3
1510 GREAT BEND 3 4 3 3
1601 N. PUGET SOUND 4 4 3 3
1602 N. CENTRAL PUGET SOUND 4 5 4 4
1603 CENTRAL PUGET SOUND 5 5 4 4
1604 ELLIOT BAY 4 5 4 3
1605 EAST PASSAGE 4 5 4 3
1606 COLVOS PASSAGE 3 3 2 2
1607 COMMENCEMENT BAY 2 2 2 2
1608 NARROWS 3 3 3 2
1609 STEILACOOM 3 3 3 2
1610 NISQUALLY 5 5 5 4
1611 TREBLE-JOHNSON 3 3 2 2
1612 HALE PASSAGE 2 2 2 2
1613 CARR INLET 4 5 4 4
1614 PITT PASSAGE 2 2 2 2
1615 DRAYTON HARBOR 2 2 2 2
1616 CASE INLET 4 4 3 3
1617 HENDERSON INLET 2 2 2 1
1618 DANA PASSAGE 2 2 2 2
1619 BUDD INLET 3 4 3 3
1620 ELD INLET 2 3 2 2
1621 TOTTEN INLET 1 1 1 1
1622 PICKERING PASSAGE 3 4 3 2
1623 PEALE PASSAGE 3 3 3 2
1624 SQUAXIN 2 2 2 1
1625 SKOOKUM INLET 1 1 1 1
1626 HAMMERSLEY INLET 2 2 2 2
1627 OAKLAND BAY 2 2 1 1
1628 AGATE PASSAGE 2 2 2 2
1629 LIBERTY BAY 2 3 2 2
1630 PORT ORCHARD 3 3 3 2
1631 SINCLAIR INLET 2 3 2 2
1632 DYES INLET 3 3 2 2
1633 RICH PASSAGE 3 4 3 3
1634 QUARTERMASTER HARBOR 2 3 2 2
1635 DALCO PASSAGE 4 5 4 3
1636 BALCH PASS 1 1 1 1
[Statutory Authority: Chapter 90.48 RCW. 92-10-005 (Order 91-13), § 173-183-470, filed 4/23/92, effective 5/24/92.]
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173-183-500
Vulnerability of the Columbia River estuary environment to oil spills.
(1) The purpose of this section is to describe the method of ranking vulnerability of the Columbia River estuary environment to oil spills for purposes of assessing damages using the compensation schedule.
(2) The Columbia River estuary has been distinguished from other estuarine waters of the state because it resides within the jurisdiction of two states, Washington and Oregon.
(3) For purposes of RCW 90.48.366, estuarine waters of the Columbia River are divided into one kilometer square cells. Bird, fish, mammal, invertebrate, habitat, and human use resource sensitivity have been evaluated for each cell by season. Seasonal resource sensitivities are ranked for each cell on a 1 to 5 scale where 5 represents the greatest sensitivity and 1 represents the least sensitivity as designated on the maps attached as Appendix 6 of this chapter.
(4) A vulnerability score (VS) shall be calculated at the time of a spill for each cell and for the most sensitive season impacted by the spill. The VS rates the vulnerability of public resources to the spilled oil.
(a) VS for a particular cell is determined by summing the sensitivity scores assigned to each cell for bird, fish, mammal, invertebrate, habitat, and human use resources as follows:
VSij = BSSij FSSij MSSij ISSij HSSij HUSij
where VSij = spill vulnerability score for a particular call and season
BSS = bird sensitivity score (from Appendix 6 of this chapter)
FSS = fish sensitivity score (from Appendix 6 of this chapter)
MSS = mammal sensitivity score (from Appendix 6 of this chapter)
ISS = invertebrate sensitivity score (from Appendix 6 of this chapter)
HSS = habitat sensitivity score (from Appendix 6 of this chapter)
HUS = human use sensitivity score (from Appendix 6 of this chapter)
i = the cell under consideration
j = the most sensitive season impacted; fall, winter, spring, or summer
(b) The raw vulnerability score for a spill (SVS) is determined by calculating the average of the vulnerability scores for the cells exposed to the spill as follows:
SVSj = (VS1 VS2 ... VSx)/x
where VSi = vulnerability score for cell i (from subsection (4)(a) of this section),
x = number of cells exposed to the spill, and
(5) The final SVS score is found by rounding the raw SVS score calculated from the formula in subsection (4) of this section to the nearest 0.01 as follows: Decimals less than 0.005 shall be rounded down and decimals equal to or greater than 0.005 shall be rounded up.
[Statutory Authority: Chapter 90.48 RCW. 92-10-005 (Order 91-13), § 173-183-500, filed 4/23/92, effective 5/24/92.]
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173-183-600
Vulnerability of freshwater stream, river, and lake environments to oil spills.
(1) The purpose of this section is to describe the method of ranking the vulnerability of state freshwater stream, river, and lake environments, and portions thereof, to oil spills for purposes of applying the compensation schedule.
(2) Vulnerability of freshwater stream, river, and lake environments to oil spills is based on water type classifications and a habitat index.
(3) For each oil spill into a freshwater stream, river, or lake, a spill vulnerability score (SVS) is calculated. The SVS rates the vulnerability of public resources to spilled oil based on the spilled oil's propensity to cause acute toxicity, mechanical injury, and to persist in the environment. SVS is determined by multiplying the freshwater vulnerability score, which is based on the water type classification, by the habitat index score as described by the following formula:
Raw Spill Vulnerability Score (SVS)= FVS* HI.
where FVS = Freshwater vulnerability score (from WAC 173-183-610), and
HI = Habitat index (from WAC 173-183-620).
(4) The final SVS score is found by rounding the raw SVS score calculated from the formula in subsection (3) of this section to the nearest 0.01 as follows: Decimals less than 0.005 shall be rounded down and decimals equal to or greater than 0.005 shall be rounded up.
[Statutory Authority: Chapter 90.48 RCW. 92-10-005 (Order 91-13), § 173-183-600, filed 4/23/92, effective 5/24/92.]
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173-183-610
Freshwater vulnerability index.
(1) For purposes of this chapter, freshwater streams, rivers, lakes, and portions thereof, are classified into 5 water types based on the identification system set forth in WAC 222-16-030 which is incorporated by reference.
(a) "Type 1 Water" means all waters, within their ordinary high-water mark, as inventoried as "shorelines of the state" under chapter 90.58 RCW.
(b) "Type 2 Water" shall mean segments of natural waters which are not classified as Type 1 Water and have a high use and are important from a water quality standpoint for:
(i) Domestic water supplies;
(ii) Public recreation;
(iii) Fish spawning, rearing, or migration or wildlife uses; or
(iv) Are highly significant to protect water quality.
(c) "Type 3 Water" shall mean segments of natural waters which are not classified as Type 1 or 2 Water and have a moderate to slight use and are moderately important from a water quality standpoint for:
(i) Domestic water supplies;
(ii) Public recreation;
(iii) Fish spawning, rearing, or migration or wildlife uses; or
(iv) Are highly significant to protect water quality.
(d) "Type 4 Water" shall mean segments of natural waters which are not classified as Type 1, 2, or 3. Their significance lies in their influence of water quality downstream in Type 1, 2, or 3 Waters. These may be perennial or intermittent.
(e) "Type 5 Water" means all other waters, in natural water courses, including streams with or without a well-defined channel, areas of perennial or intermittent seepage, ponds, and natural sinks. Drainage ways having short periods of runoff are considered to be Type 5 Waters.
(3) The vulnerability of freshwater environments is based on the stream typing system established in WAC 222-16-030 incorporated by reference. The rating of biological and recreational resources ranges from 1 to 5 where 5 represents the most sensitive category and 1 represents the least sensitive category as follows:
TABLE 11. Freshwater Vulnerability Score (FVS).
FVS QUALIFICATION
5 "Type 1 waters"
4 "Type 2 waters"
3 "Type 3 waters"
2 "Type 4 waters"
1 "Type 5 waters"
[Statutory Authority: Chapter 90.48 RCW. 92-10-005 (Order 91-13), § 173-183-610, filed 4/23/92, effective 5/24/92.]
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173-183-620
Habitat index.
(1) Most state freshwaters vary to some degree from the natural condition as increased activities within individual watersheds have decreased stream, river, and/or lake habitat quality. In order to account for that degradation prior to assessing damages using the compensation schedule, a habitat index (HI) is calculated to represent existing stream conditions prior to the oil spill.
(2) For each stream, river, or lake impacted by an oil spill where the preassessment screening committee determines that the compensation schedule shall be used, a habitat index (HI) shall be calculated following an oil spill using the following methodology. The HI measures the amount of stream degradation from natural conditions and shall be calculated using the following formula:
Habitat Index (HI) = [(P123456)÷Np] x f1 x f2 x f3
where: P1 = barriers to natural fish movement
P2 = urbanization
P3 = condition of riparian vegetation
P4 = condition of floodplain
P5 = land use of watershed
P6 = flow alteration
Np = number of P parameters used to calculate HI
f1 = channel modifications
f2 = impoundment
f3 = water quality
(3) The RDA committee shall determine which of the habitat quality parameters described in subsection (2) of this section are applicable to the particular spill under consideration. If a parameter is not applicable to the spill under consideration, the parameter shall not be included in the formula provided in subsection (2) of this section.
(4) Habitat quality parameters (P).
(a) Barriers to natural fish movement (P1). Barriers, to some degree, limit the free passage of fish upstream thus limiting the ability of streams to recover. The scoring of this parameter is based on the influence of barriers in the natural dispersal of fish populations as follows:
Table 12. Scoring of Barriers to Natural Fish Movement (P1).
RATING QUALIFICATION
10 No manmade obstructions to free upstream passage of fish
8 No dams or other structures causing a vertical drop of more than 1 foot during low flow
5 No dams or other structures causing a vertical drop of more than 3 foot during low flow
3 No dams or other structures causing a vertical drop of more than 10 foot during low flow
0 One to several dams or other structures each causing a drop of more than 10 feet during low flow
(b) Urbanization (P2). Urban development has historically had negative habitat effects on freshwater ecosystems. The percent of urban development in a watershed directly influences siltation, riparian abuse, and water quality deterioration. The scoring of this parameter is based on the percent of urbanization in the stream watershed.
Table 13. Scoring of Urbanization (P2).
RATING QUALIFICATION
10 Less than 5 percent of the watershed in urban development
8 Five to 10 percent of the watershed in urban development
5 Ten to 40 percent of the watershed in urban development
3 Forty to 70 percent of the watershed in urban development
0 Seventy to 100 percent of the watershed in urban development
(c) Condition of riparian vegetation (P3). Riparian vegetation is important to seventy percent of the animal and bird species in Washington for some part of their life cycle. It also exerts thermal regulatory and thermal controls for the aquatic system. The scoring of this parameter is based on the percent of banks that are protected by effective riparian vegetation.
Table 14. Scoring of Condition of Riparian Vegetation (P3).
RATING QUALIFICATION
10 Ninety to 100 percent of the banks are protected by appropriate perennial vegetation
8 Sixty to 90 percent of the banks are protected by appropriate perennial vegetation
5 Forty to 60 percent of the banks are protected by appropriate perennial vegetation
3 Ten to 40 percent of the banks are protected by appropriate perennial vegetation
0 Zero to 10 percent of the banks are protected by appropriate perennial vegetation
(d) Condition of the floodplain (P4). The condition of the floodplain forecasts the amount of sedimentation and erosion in the watershed and as such is a primary predictor of stream degradation. The rating of this parameter is as follows:
Table 15. Scoring of the Condition of the Floodplain (P4).
RATING QUALIFICATION
10 Little or no evidence of active or recent erosion of the floodplain during floods
5 All segments show evidence of occasional erosion of the floodplain. Stream channel essentially intact
0 Floodplain severely eroded and degraded, stream channel poorly defined with much lateral erosion and much reduced flow capacity
(e) Land use of the watershed (P5). Land use practices exert a great deal of influence on the quality of the aquatic habitat. The rating of this parameter is as follows:
Table 16. Scoring of Land Use of the Watershed (P5).
RATING QUALIFICATION
10 More than 80 percent of the watershed protected by timber, improved pasture, terraces, or other conservation practices
8 Sixty to 80 percent of the watershed protected by timber, improved pasture, terraces, or other conservation practices
5 Forty to 60 percent of the watershed protected by timber, improved pasture, terraces, or other conservation practices
3 Twenty to 40 percent of the watershed protected by timber, improved pasture, terraces, or other conservation practices
1 Zero to 20 percent of the watershed protected by timber, improved pasture, terraces, or other conservation practices
(f) Flow alteration (P6). Alteration of the natural flow regime can frequently alter habitat conditions that are necessary for certain behavioral and ecological needs of species. The rating of this parameter is as follows:
Table 17. Scoring for Flow Alteration (P6).
RATING QUALIFICATION
10 Less than 1 percent of the watershed controlled by impoundments and/or less than 50 percent of the watershed controlled by farm ponds
8 One to 30 percent of the watershed controlled by impoundments and/or less than 50 percent of the watershed controlled by farm ponds
5 Thirty to 60 percent of the watershed controlled by impoundments and/or less than 50 percent of the watershed controlled by farm ponds
3 Sixty to 95 percent of the watershed controlled by impoundments and/or less than 50 percent of the watershed controlled by farm ponds
0 Ninety-five to 100 percent of the watershed controlled by impoundments and/or less than 50 percent of the watershed controlled by farm ponds
(5) Habitat alteration functions (F). Each habitat alteration function has the power to reduce the habitat quality rating, dependent on the type and extent of alteration. Functions are expressed on a scale of 0 to 1.0.
(a) Channel modification (F1). Channel modification can have a dramatic effect of the ability of a stream to provide for a diversity of habitats. This parameter is rated as follows:
Channel Modification (F1) = 1.0 - (SM*FR)
where F1 = Channel modification rate
SM = Percent stream reach modified, expressed as a decimal
FR = Percent fish reduction, expressed as a decimal
Table 18. Scoring for Percent Fish Reduction (FR).
CHANNEL MODIFICATION % FISH REDUCTION
Clearing, Snagging 25
Channel realignment 80
Channel paving 95
(b) Water quality (F2). Water quality exerts a variety of detrimental and/or beneficial on the aquatic ecosystem. This parameter is rated as follows:
Table 19. Scoring for Water Quality (F2).
RATING QUALIFICATION
1.0 Stream water unpolluted. No pollutants detected by standard methods
0.8 Occasional above normal levels of one or more water pollutants usually present, but detectable only by analysis
0.5 Occasional visible signs of oversupply of nutrients or other pollutants detected by analysis
0.4 Occasional fish kills averaging about every 4 years or more
0.2 Occasional fish kills occurring more often than every 4 years
0.0 Grossly polluted waters with fish kills occurring annually or more frequently
(c) Streambed condition (F3). The condition of the substrate habitat can be altered in such a way as to reduce the effective habitat available to the aquatic community as a whole. This parameter is ranked as follows:
Table 20. Scoring of Streambed Condition. (continued)