CULVERT INSTALLATION. Culvert installation must be in accordance with the CULVERT AND DRAINAGE SPECIFICATION DETAIL and the Corrugated Polyethylene Pipe Association’s “Recommended Installation Practices for Corrugated Polyethylene Pipe and Fittings”.
CULVERT INSTALLATION. Culvert installation must be in accordance with the CULVERT AND DRAINAGE SPECIFICATION DETAIL. Corrugated Polyethylene pipe must be installed in a manner consistent with the manufacturer’s recommendations. Culverts shall be banded using lengths of no less than 10 feet, and no more than one length less than 15 feet.
CULVERT INSTALLATION. Culvert installation must be in accordance with the CULVERT AND DRAINAGE SPECIFICATION DETAIL, LIVE STREAM INSTALLATION PROCEDURE DETAIL, the National Corrugated Metal Pipe Association’s "Installation Manual for Corrugated Steel Drainage Structures", and the Corrugated Polyethylene Pipe Association’s “Recommended Installation Practices for Corrugated Polyethylene Pipe and Fittings”. Corrugated Polyethylene pipe must be installed in a manner consistent with the manufacturer’s recommendations.
CULVERT INSTALLATION. Culvert, downspout, flume and energy dissipator installation must be in accordance with the CULVERT AND DRAINAGE SPECIFICATION DETAIL and the Corrugated Polyethylene Pipe Association’s “Recommended Installation Practices for Corrugated Polyethylene Pipe and Fittings”. Corrugated Polyethylene pipe must be installed in a manner consistent with the manufacturer’s recommendations.
CULVERT INSTALLATION. As noted previously, the till surface elevation at the borehole locations ranges from a low of el. 15.08 at BH- 02 to a high of el. 15.18 m at BH-01. In view of the loose and potentially compressible nature of the topsoil, it is recommended that the topsoil layer be removed from below the replacement culverts. The excavation should extend downward to the till surface and outward a minimum horizontal distance equal to the depth of new pipe bedding. Based on the conditions encountered at the boreholes, it is expected that approximately 700 mm (+/-) of Class A gravel bedding material will be required to establish the specified invert elevations, following topsoil removal. To ensure stable bearing conditions, the bedding should extend outward from the perimeter of the new culverts a horizontal distance at least equal to the depth of bedding placed below the pipes. Excavation to the required level should be possible with conventional earth moving equipment (i.e., large backhoe or excavator). Final excavation to the till surface should be undertaken with a ditching type bucket (i.e., no teeth) so as to minimize disturbance of the till surface. Some temporary lowering of the groundwater table may be necessary to minimize disturbance of the till surface prior to placement of the gravel bedding. Control of groundwater inflow may require pumping from a sump(s) located below the required depth of excavation. A temporary stream diversion may also be required depending on the design details for the new structure. Depending on the insitu conditions encountered, the use of a clean (i.e., no fines) granular bedding layer (e.g., 20 mm concrete stone) could be considered in place of the proposed Class A gravel. Such a granular layer should also assist with the groundwater control. The use of a non-woven geotextile should be used in conjunction with clean granular bedding, to prevent the migration of fines into (or through) the granular layer. The bedding layer (Class A gravel or clean granular fill) should be placed and compacted in lifts; maximum lift thickness should be compatible with the compaction equipment selected for use.
CULVERT INSTALLATION. In view of the random and potentially compressible nature of the existing fill, it is recommended that excavation for the replacement culvert extend to the underlying till or bedrock surface. Since excavation to this level will extend below the groundwater table, it may be advantageous to also remove the thin (150 mm +/-) layer of till, if water disturbance/softening becomes an issue. In any case, some temporary lowering of the groundwater table may be necessary to facilitate the installation and backfilling of the replacement culvert. Control of groundwater inflow may require pumping from a sump(s) located below the required depth of excavation. A temporary stream diversion could also be considered depending on the design details and alignment selected for the new culvert. It is understood that Granular Class A gravel is typically utilized for pipe bedding. Depending on the insitu conditions encountered with regard to water inflow, the use of a clean (i.e., no fines) granular bedding layer (e.g., 20 mm concrete stone) could be considered in place of the Class A gravel. Such a granular layer should also assist with groundwater control. The use of a non-woven geotextile should be used in conjunction with clean granular bedding, to prevent the migration of fines into (or through) the granular layer. The bedding layer (Class A gravel or clean granular fill) should be placed and compacted in lifts; the maximum lift thickness should be compatible with the compaction equipment selected for use. It is expected that most of the excavated fill will not be suitable for reuse as culvert backfill due to its random nature, elevated moisture contents, and the presence of wood.
CULVERT INSTALLATION. 2.36.1 If the project is located in a moderate to very high Fire Hazard Severity Zone as designated by CAL FIRE, culvert materials should consist of corrugated metal pipe (CMP). Use of High-Density Polyethylene (HDPE) pipe is not recommended.
CULVERT INSTALLATION. See Exhibit E of the contract for “Culvert Specifications” and “Culvert List.” Non-Project Roads. Road improvement and construction not required by this section but approved in the Operations Plan shall be subject to the following requirements, unless otherwise approved in writing by STATE: Prior to felling, PURCHASER shall mark right-of-way clearing limits and obtain STATE approval. Subgrade shall not exceed 14 feet in width. Work shall not be allowed from October 15 through May 15. Upon completion of use, roads shall be waterbarred according to the specifications in Exhibit F and blocked to vehicle traffic as directed by STATE.
CULVERT INSTALLATION. Culvert installation must be in accordance with the CULVERT AND DRAINAGE SPECIFICATION DETAIL. Culverts shall be banded using lengths of no less than 10 feet, and no more than one length less than 20 feet. Shorter section of banded culvert shall be installed at the inlet end.
CULVERT INSTALLATION. As an alternative to and in addition to any provisions provided in the Statutes of the State of Kansas for the construction, alteration or reconstruction of culverts in the City, the City may install a culvert at the request of a property owner under the following conditions:
