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Title 23 Central Valley Flood Protection Board
<br /> § 123
<br /> §122. Irrigation and Drainage Ditches,Tile Drains,and (8) Low-voltage electrical or communication lines of twenty-four
<br /> Septic Systems. (24)volts or less may be installed parallel to a levee and within ten(10)
<br /> (a)Irrigation 'itches,drainage ditches,and similar facilities must sat- feet of the levee toe when it is demonstrated to be necessary and to not
<br /> isfy the followin criteria: interfere with the integrity of levee, levee maintenance, inspection, or
<br /> (1)All ditches must be located at least ten(10)feet from the levee toe. flood fight procedures.
<br /> (2) The bottom of any agricultural ditch must be located above the (9)The board may require the applicant to have any pipelines,con-
<br /> projected levee!:lope.Accordingly,a deep ditch may need to be located duits, utility lines and appurtenant structures designed by a registered
<br /> farther than the minimum ten(10) feet from the levee toe. (See Figure civil engineer.
<br /> (c)Pipelines,conduits,and utility lines installed within the
<br /> owitloodway
<br /> (b)Tile drains, septic systems,and similar facilities must satisfy the must conform to the follng additional conditions:
<br /> following criteria: (1)Pipelines,conduits,and utility lines installed within the floodway
<br /> (I)All rile drains,septic tanks,or leach fields must be located at least must have a minimum cover of five(5)feet beneath the low water chan-
<br /> ten(10)feet from the levee toe. net,and a minimum of two(2)feet in the remaining area of the floodway.
<br /> (2)The bottom of any tile drain,septic tank,or leach field must be lo- A greater depth of cover may be required based upon the feasibility of
<br /> cated above the lxojected levee slope, achieving the required cover or local soil stability and channel hydrau-
<br /> (3)Positive cinsure valves may be required on a tile drain pipeline to tics.
<br /> prevent backflow.
<br /> (2)Open--trench backfill to cover pipes must be placed in a manner
<br /> NOTE:Authority c.!ed:Section 8571,Water Code.Reference:Sections 8608 and consistent with floodway characteristics such as erosion,deposition,and
<br /> 8710,Water Code.
<br /> HISTORY streamflow velocities. This requirement is generally ensured by using
<br /> 1.New section filed 9 30 96:operative 10-30-96(Register 96,No.40). suitable material and compacting to the density of adjacent undisturbed
<br /> §123. Pipelines, Conduits,and Utilit Lines. material. Compaction tests by a certified soils laboratory may be re-
<br /> Y quired.
<br /> (a)The following definitions apply to this section: (3)In general,any standard material may be used for pipelines or con-
<br /> (1)Delta Lowlands. "Delta Lowlands"means those lands within the duits to be installed within the floodway ten(10) feet or more from the
<br /> Sacramento Sari Joaquin Delta that are approximately at the five—(5) levee toe or the projected levee slope.
<br /> foot contour and below as shown in Figure 8.04. (4) All debris that accumulates around utility poles and guy wires
<br /> (2)Delta Uplands."Delta Uplands"means those lands within the Sa- within the floodway must be completely removed following the flood
<br /> cramento San Joaquin Delta that are above the five—(5)foot contour as season and immediately after major accumulations.
<br /> shown in Figure 8.04.
<br /> (5)Pipelines and conduits which are open to the waterway and which
<br /> (b)Pipelines,(:onduits. utility lines,and appurtenant structures must could cause flood damage from uncontrolled backflow during the design
<br /> conform to the hallowing criteria: flood event shall have a readily accessible positive closure device.A flap
<br /> (I) Pipelines, conduits, utility lines, utility poles, and appurtenant gate is not a positive closure device.
<br /> structures may not be installed within the levee section,within ten(10) (d)Pipelines,conduits,and utility lines installed through a levee must
<br /> feet of levee toes, or within the floodway during the flood season unless conform to the following additional conditions:
<br /> authorized by the General Manager based on reservoir levels,stream lev- (1)The installation of a fluid—or gas carrying pipeline in a levee sec-
<br /> els,and forecasted weather conditions on a case—by case basis,pursuant tion or within ten(10)feet of the toe parallel to
<br /> to section 11. the centerline is not per-
<br /> milted.
<br /> (2)Appurtenant structures such as standpipes,utility poles,distribu- (2)Pipelines,conduits,and utility tines must be installed through a le-
<br /> tion boxes,guy wires,and anchors,but not including siphon breakers,are vee as nearly at a right angle to the levee centerline as practical.
<br /> generally not permitted in or below the J.evee crown,on the levee slopes, (3)Buried pipelines,conduits,and utility lines that do not surface near
<br /> or within ten(1 C)feet of the levee toes.Appurtenant structures may be the levee toes must have location markers near both levee toes.
<br /> permitted where .hey will not interfere with levee maintenance or flood (4)Buried pipelines,conduits,and utility lines that cross the levee at
<br /> tight activities. right angles must have a location marker located on the levee slope adja-
<br /> (3) Appropriate, visible markers acceptable to the local maintaining cent to either shoulder.
<br /> agency may be required to identify the location of buried pipelines,con- (5)Buried pipelines,conduits,and utility lines that cross the levee at
<br /> duits, and utility lines. A siphon breaker or other visible appurtenance other than right angles must have location markers on the levee slopes
<br /> may be considen.d an acceptable marker for the attached buried line. adjacent to each shoulder.
<br /> Markers must be made of durable, long,lasting, fire—resistant material, (6)Pipelines carrying gas or fluids under pressure must be confirmed
<br /> and must be maintained by the permittee until the pipeline, conduit or free of leaks during construction by pressure tests,N-ray,or equivalent
<br /> utility line is properly abandoned. methods,and must be tested anytime atter construction upon request of
<br /> (4)Pipelines,, and utility lines that pose a threat or danger to the board.
<br /> levee maintenan,.e or flood fight activities,such as high—voltage lines, (7)Pipelines carrying gas or fluids under pressure must have a readily
<br /> gas lines,and high pressure fluid lines,must be distinctively labeled to accessible rapid closure device located within ten(10)feet of the landside
<br /> identify the cont�_trts.
<br /> levee toe.
<br /> (5)Buried higr voltage lines of greater than twentyfour(24)volts (8)Pipelines and conduits open to the waterway must have a readily
<br /> are required to be protected with schedula40 PVC conduit,or equivalent. accessible positive closure device unless it can be demonstrated it is not
<br /> (6) Overhead electrical and communication lines must have a mini- necessary.A flap gate is not a positive closure device,
<br /> mum vertical clearance above the levee crown and access ramps of twen- (9)The side slopes of trenches excavated for the installation of pipe-
<br /> ty one(2 1)feet 1�it lines carrying 750 volts or less,and twenty-five(25) lines,conduit,or utility lines may be no steeper than one(I)foot horizon-
<br /> feet for lines can-ving higher voltage.elinetat to one(1)foot vertical.The following are exceptions to this maximum
<br /> (7)Fluid or g;ss carrying pips installed parallel to a levee must slope requirement:
<br /> be a minimum distance of ten (10) feet from the levee toe and,where (A)For shallow installations above the flood plane,e.g.,twelve(12)
<br /> practical,may not encroach into the projected levee slope. inches,vertical side slopes may be allowed.
<br /> Page 4.23 Register 2(X)9,No.49;12-4-2(X19
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