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| WAC Sections |
| 220-660-010 | Purpose. |
| 220-660-020 | Instructions for using chapter 220-660 WAC. |
| 220-660-030 | Definitions. |
| 220-660-040 | Applicability of hydraulic project approval authority. |
| 220-660-050 | Procedures—Hydraulic project approvals. |
| 220-660-060 | Integration of hydraulic project approvals and forest practices applications. |
| 220-660-070 | Changes to hydraulic project approval technical provisions. |
| 220-660-080 | Mitigation requirements for hydraulic projects. |
| 220-660-090 | Technical provisions. |
| 220-660-100 | Freshwater habitats of special concern. |
| 220-660-110 | Authorized work times in freshwater areas. |
| 220-660-120 | Common freshwater construction provisions. |
| 220-660-130 | Stream bank protection and lake shoreline stabilization. |
| 220-660-140 | Residential and public recreational docks, piers, ramps, floats, watercraft lifts, and buoys in freshwater areas. |
| 220-660-150 | Boat ramps and launches in freshwater areas. |
| 220-660-160 | Marinas and terminals in freshwater areas. |
| 220-660-170 | Dredging in freshwater areas. |
| 220-660-180 | Sand and gravel removal. |
| 220-660-190 | Water crossing structures. |
| 220-660-200 | Fish passage improvement structures. |
| 220-660-210 | Channel relocation and realignment. |
| 220-660-220 | Large woody material placement, repositioning, and removal in freshwater areas. |
| 220-660-230 | Beaver dam management. |
| 220-660-240 | Pond construction. |
| 220-660-250 | Water diversions and intakes. |
| 220-660-260 | Outfall structures in freshwater areas. |
| 220-660-270 | Utility crossings in freshwater areas. |
| 220-660-280 | Felling and yarding of trees. |
| 220-660-290 | Aquatic plant removal and control. |
| 220-660-300 | Mineral prospecting. |
| 220-660-305 | Mineral prospecting involving motorized or gravity siphon equipment. |
| 220-660-310 | Tidal reference areas. |
| 220-660-320 | Saltwater habitats of special concern. |
| 220-660-330 | Authorized work times in saltwater areas. |
| 220-660-340 | Intertidal forage fish spawning bed surveys. |
| 220-660-350 | Seagrass/macroalgae habitat surveys. |
| 220-660-360 | Common saltwater construction provisions. |
| 220-660-370 | Shoreline stabilization in saltwater areas. |
| 220-660-380 | Residential and public recreational docks, piers, ramps, floats, watercraft lifts, and buoys in saltwater areas. |
| 220-660-390 | Boat ramps and launches in saltwater areas. |
| 220-660-400 | Marinas and terminals in saltwater areas. |
| 220-660-410 | Dredging in saltwater areas. |
| 220-660-420 | Artificial aquatic habitat structures in saltwater areas. |
| 220-660-430 | Outfall and tide and flood gate structures in saltwater areas. |
| 220-660-440 | Utility crossings in saltwater areas. |
| 220-660-450 | Test boring in saltwater areas. |
| 220-660-460 | Informal appeal of administrative actions. |
| 220-660-470 | Formal appeal of administrative actions. |
| 220-660-480 | Compliance with HPA provisions. |
| 220-660-490 | Habitat recovery projects. |