BEsT MANAGEMENT PRACTICEs HANDbooK - Tahoe BMP

Table 2-3: Basis of Capability Classification for Lake Tahoe Basin Lands 23CAPABILITYLEVELSTOLERANCEFOR USESLOPEPERCENTRELATIVEEROSIONPOTENTIALRUNOFFPOTENTIAL7 Most 0-5 Slight Low tomoderately low6 0-16 Slight Low tomoderately low5 0-16 Slight Moderately highto high4 9-30 Moderate Low tomoderately low3 9-30 Moderate Moderately highto high2 30-50 High Low tomoderately low1a Least 30 + High Moderately highto high1b1cPoor natural drainageFragile Flora and FaunaDISTURBANCEHAZARDSLow Hazard LandsLow Hazard LandsLow Hazard LandsModerate HazardlandsModerate HazardLandsHigh Hazard LandsHigh Hazard Lands2.3.1.8 UTILITIESIncorporate mapped utilities onto the BMP map to ensure BMPs are notdesigned near a utility. Local utility districts will have information on mappedutilities. Hitting a utility during construction is avoidable and measures shouldbe taken throughout the project to know all utility locations prior to andduring construction.2.3.2 INITIAL SITE VISITThe initial site visit should identify existing conditions such as landscapefeatures and drainage patterns. The initial site visit should compare these fieldobservations with the information that was previously gathered. If the site visitleads to the assumption that a portion of the mapped information is inaccurate,an additional site visit may be required. This is the step where you shoulddetermine if permits or a follow up site visit should be performed to verifyinformation. As you perform the initial site visit, think what opportunities andconstraints there are for BMP implementation including on-site infiltrationcapacity, slope stabilization, revegetation, drainage conveyances, and pavingrequirements.23Bailey, Robert G., 1974, Land Capability Classification of the Lake Tahoe Basin, California-NevadaTRPA BMP HandbookCHAPTER 2: Site Analysis2012 Page 2-21