7714 EASY ST 2016-11-07 - Laserfiche WebLink

STORM AND SURFACE WATER 3. Connections to a pipe system shall be made only at catch basins or manholes. No wyes or tees are allowed except on roof, footing, or yard drain systems on pipes 8 inches in diameter or less, with clean- outs upstream of each wye or tee. 4. 6 inches minimum vertical and 3 feet minimum horizontal clearance (between outside surfaces) shall be provided between storm drain pipes and other utility pipes and conduits. 5. Any closed storm drainage system collecting runoff from paved areas in the public right-of-way or private property shall provide for floatable material separation (see Standard Plan No. 410) prior to discharge to the main storin drainage system in the public right-of-way, unless otherwise approved by the City engineer. 6. All PVC connections to catch basins or manholes shall be made by grouting in an approved manhole adapter into which the PVC pipe is inserted. 7. Activities such as trench excavation, tunneling or boring, pipe embedment, backfilling, compaction, safety and pavement �atching, whether for public or private utilrties, shali conform to the requirements set forth in other Sections of these Standards. For all the above, except pavement patching, see Section 3-9 Underground Utilities and Standard Plan Nos. 610, 611 and 615. For pavement patching see Section 3-14 and Standard Plan No. 316. 4-2.3(5) FRAMES/LIDS/GRATES/COVERS 1. In general, frames and grates shall be furnished and installed per Standard Plan Nos. 405 through 409. 2. The cover or grating of a manhole or catch basin shall not be �routed to final grade until the final elevation of the pavement, gutter, ditch, or sidewalk in which it is to be placed has been established, and until permission thereafter is given by the City inspector to grout the cover or grating in place. Lids, grates, and covers shall be seated properly to prevent rocking. 4. All catch basins and manholes in unpaved areas shall be equipped with locking frames and lids or grates per Standard Plan Nos. 405 or 607. 5. All Type II catch basins and all manholes with catches shall be supplied with locking lids or grates per standard plan No. 405. 6. Type II catch basins and manholes functioning exclusively as access structures shall be equipped with round 24 inch covers and frames per 5tandard Plan No. 607. 7. Round lids on all storm drain structures shall have "Drain" cast into the lid. 8. In conditions when the effectiveness of a normal grate installation would be limited, an open curb face frame and grate shall be furnished and installed per Standard Plan Nos. 408 and 409. These conditions include high likelihood of clogging from leaf fall, especially in sag vertical curves; when the inlet is a surface drainage end point, such as a cul-de-sac; and when normal mlet grates may be passed over due to the road grade. The use of open curb face frame and grates must be approved by the City engineer. 4-2.3(6) RESTRICTOR DEVICES 4 1. The minimum orifice size diameter allowed for use in the City of Everett is one inch. 2. Restrictor devices shall be constructed and installed in accordance with Standa.rd Plan numbers 412A through 412C. STANDARDS 4-4