Drainage Design Manual - the City of San Luis Obispo

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C. When paving involves asphaltic concrete (AC), the following steps shall beimplemented to prevent the discharge of grinding residue, uncompacted or looseAC, tack coats, equipment cleaners, or unrelated paving materials.1. Do not wash sand or gravel from new asphalt into storm drains, streets, andcreeks. Sweeping or other means of removal from the site shall be utilized.2. AC grindings, pieces, or chunks used in embankments or shoulder backingmust not be allowed to enter any storm drains or watercourses.3. Collect and remove all broken asphalt and recycle when practical; otherwise,dispose in accordance with the Caltrans Standard Specification 7-1.13.4. Any AC chunks and pieces used in embankments must be placed above thewater table and covered by at least 0.3m (1 ft) of material.5. Use only non-toxic substances to coat asphalt transport trucks and asphaltspreading equipment.D. Drainage inlet structures and manholes shall be covered with filter fabric or tapeduring application of seal coat, tack coat, slurry seal, and/or fog seal.E. Seal coat, tack coat, slurry seal, or fog seal shall not be applied if rainfall ispredicted to occur during the application or curing period.F. Clean asphalt coated equipment off-site. When cleaning dry, hardened asphaltfrom equipment, manage hardened asphalt debris as described in “Solid WasteManagement”. Any cleaning on site shall follow the section of this specification“Vehicle and Equipment Cleaning”.G. Do not wash sweepings from exposed aggregate concrete into a storm drainsystem. Collect and return to aggregate base stockpile, or dispose of properly.H. Allow aggregate rinse to settle. Then, either allow rinse water to dry in atemporary pit as described in “Concrete Waste Management”, or pump the waterto the sanitary sewer if allowed by the local wastewater authority.I. Do not allow saw-cut Portland Concrete Cement (PCC or AC) slurry to enterstorm drains or watercourses. Residue from grinding operations shall be picked upby means of a vacuum attachment to the grinding machine, shall not be allowed toflow across the pavement, and shall not be left on the surface of the pavement.See also the sections of this specification “Concrete Waste Management”, and“Liquid Waste Management”.J. When approved by the Engineer, stockpile material removed from roadways shallbe kept away from drain inlets, drainage ditches, and watercourses.K. Do not transfer or load bituminous material near drain inlets, the storm waterdrainage system or watercourses.SLO Creek Drainage Design Manual 124 February 2003
BMP 5 Illicit Connection/Illegal Discharge Detection and ReportingI. Definition and PurposeProcedures and practices designed for construction contractors to recognize illicitconnections or illegally dumped or discharged materials on a construction site and reportincidents to the Engineer.II. Appropriate ApplicationsIllicit connection/illegal discharge detection and reporting is applicable anytime an illicitdischarge is discovered or illegally dumped material is found on the construction site.III. Standards and SpecificationsA. Contractor shall inspect the site before beginning the job for evidence of illicitconnections or illegal dumping or discharges, and shall promptly notify theProject Engineer of such conditions.B. Contractor shall inspect the site regularly during project execution for evidence ofillicit connections or illegal dumping or discharges.C. Contractor shall observe site perimeter for evidence or potential of illicitlydischarged or illegally dumped material that may enter the job site.D. Contractor shall inspect the site regularly during the project for pungent odorscoming from the drainage systems.E. Contractor shall inspect the site regularly for discoloration or oily substances inthe water or stains and residues detained within ditches, channels or drain boxes.F. Contractor shall inspect the site regularly for abnormal water flow during the dryweather season.G. Contractor shall inspect the site regularly for unusual flows in subdrain systemsused for dewatering.H. Contractor shall inspect the site regularly for excessive sediment deposits,particularly adjacent to or near active off-site construction projects.BMP 6 Potable Water/IrrigationI. Definition and PurposePotable Water/Irrigation consists of practices and procedures to reduce the possibility forthe discharge of potential pollutants generated during discharges from irrigation waterlines, landscape irrigation, lawn or garden watering, planned and unplanned dischargesfrom potable water sources, water line flushing, and hydrant flushing.SLO Creek Drainage Design Manual 125 February 2003
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San Luis Obispo CreekWaterway Manag
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SECTION 4.0 HYDROLOGIC & HYDRAULIC
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SECTION 8.0 DESIGN OF DRAINAGE PUMP
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11.12 Erosion Control Seeding......
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DRAINAGE DESIGN MANUALFOR THECITY O
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ôó1Ragged PointSan SimeonCambriaM
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SECTION 2.0PROJECTS REQUIRING HYDRO
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3. or, is an individual development
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• Geomorphic, Geotechnical and St
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SECTION 3.0CORE REQUIREMENTS AND RE
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elevations, and existing channel st
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1000 0 1000 Meters1 0 1 MilesCity L
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N300 0 300 MetersLEGEND100-Year Flo
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• All streets to be dedicated to
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• A minimum setback of 15 m (50 f
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3.6.4 Preference for Vegetative and
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compliance with the measures prescr
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4.1 Hydrologic Analysis4.1.1 Genera
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Table 4-1Runoff CoefficientsHydrolo
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Overland Flow TimeSLO Creek Phase I
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Channel or Pipe Flow occurs where f
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45745766071176260955855860971166050
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Table 4-3Rainfall - Intensity Data
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4.1.4 Example ProblemA sample basin
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Table 4-7Example Composite Runoff C
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Table 4-9Example Rational Method Ru
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developed. For minor waterways and
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SECTION 5.0OPEN CHANNEL ANALYSIS AN
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case, a Natural Channel may be modi
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5.2 Channel Design Flow Requirement
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maintenance to maintain the design
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The following guidelines should be
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Channel PlanformDrainage Design Man
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• Native vegetation shall be pres
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Manning’s Roughness Values are pr
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6.1 GeneralSECTION 6.0ANALYSIS & DE
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6.3 Design ReferencesThe designer i
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stream stabilization needs totaling
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causes and modes of failure act tog
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(permissive velocity) and/or bounda
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Re-run the model after coding in th
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Step 2 - Develop and Screen Alterna
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Cost. The design must be cost effec
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Step 3 - Develop Concept Plan and D
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Legally it is up to the applicant t
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e necessary, as well as other work
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(0.6-0.9 m)(0.6-0.9 m)(152-203 mm)L
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(1.2 m)(1.2 m)(12 mm to 51 mm)(1.5
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(0.9 m)(0.6 m x 0.6 m x 914 mm)(457
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(0.6 - 0.9 m)Vegetated GeogridDrain
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Planted Rip RapDrainage Design Manu
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A-JacksDrainage Design ManualCity &
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(1.5 m)(13 to 25 mm)(0.6 to 0.9 m)R
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(13 - 25 mm)(0.6 to 0.9 m)Planted G
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(2.4 m)(2.4 m)Flow DeflectorsDraina
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performance. This technique require
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Boulder ClustersDrainage Design Man
Page 121 and 122: of a bend, and filled around and on
Page 123 and 124: horizontal line are SI (metric) nam
Page 125 and 126: GRADING OF ROCK SLOPE PROTECTION PE
Page 127 and 128: A layer of Backing No. 1 or No. 2 i
Page 129 and 130: SECTION 7.0DESIGN OF CONDUITS, CULV
Page 131 and 132: 7.2.3 Storm Drain Location and Alig
Page 133 and 134: In paved areas, pipe cover shall be
Page 135 and 136: • Drop inlets shall be spaced suc
Page 137 and 138: Marine Fisheries Service NMFS South
Page 139 and 140: For all intermediate channels, eith
Page 141 and 142: 7.4.8 Easements for Closed Conduits
Page 143 and 144: SECTION 9.0STORMWATER MANAGEMENT FA
Page 145 and 146: Detention for the 10-year design st
Page 147 and 148: 9.2.1 Provisions For SedimentationT
Page 149 and 150: 9.5 Basin DesignDetention and reten
Page 151 and 152: mm (24 in). A corrugated metal pipe
Page 153 and 154: have side panels or other devices t
Page 155 and 156: SECTION 10.0EROSION CONTROL AND STO
Page 157 and 158: 10.3.1 Gravel Construction Entrance
Page 159 and 160: Notes:1. PLACE BALES PERPENDICULAR
Page 161 and 162: • Filter fences (also known as si
Page 163 and 164: SEED MIX ONE(Application rate = 40
Page 165 and 166: • Description of soils, geology,
Page 167 and 168: • The facilities shown on this pl
Page 169 and 170: The following control measures are
Page 171: BMP 3 Dewatering OperationsI. Defin
Page 175 and 176: D. All vehicles/equipment that regu
Page 177 and 178: I. Properly dispose of or recycle u
Page 179 and 180: BMP 12 Solid Waste ManagementI. Def
Page 181 and 182: H. Temporary washout facilities sha
Page 183 and 184: SECTION 11.0RIPARIAN REVEGETATION P
Page 185 and 186: per second (6 feet per second). Whi
Page 187 and 188: TABLE 11-2: WOODY SHRUBS FOR SAN LU
Page 189 and 190: TABLE 11-4: GRASSES AND HERBSFOR SA
Page 191 and 192: TABLE 11-5: MARSH PLANTS FOR SAN LU
Page 193 and 194: 11.4 Planting Site Considerations11
Page 195 and 196: Where vandalism is not a problem, t
Page 197 and 198: Table 11-6Recommended Species Compo
Page 199 and 200: Larger Crown TreesPlant in clusters
Page 201 and 202: plant materials (often one growing
Page 203 and 204: Exotic Treeto be RemovedNative Tree
Page 205 and 206: Step 4: Select plants suitable for
Page 207 and 208: • Exotic vegetation on the site s
Page 209 and 210: • Removal of Exotic VegetationThe
Page 211 and 212: Placement of weed control fabric or
Page 213 and 214: 11.12 Erosion Control SeedingRevege
Page 215 and 216: y wind or water runoff; should be e
Page 217 and 218: Abrasion. Removal of streambank soi
Page 219 and 220: Confluence. A junction of streams o
Page 221 and 222: Flood. A general and temporary cond
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Left Bank. The left-hand bank of st
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Shear stress. The force per unit ar
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Velocity (of water in a stream). Th
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Association of Bay Area Governments
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Hoover, Robert F. 1970. The Vascula
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U.S. Army Corps of Engineers, April
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Drainage Design Manual - the City of San Luis Obispo

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