Condit Dam Removal Condit Dam Removal - Access Washington

More documents

Recommendations

Info

Condit Dam Hydroelectric Project Final Supplemental EIS 4.8 NOISE This section addresses potential impacts from noise associated with the Proposed Action. The two main sources of noise are anticipated to be blasting during dam removal, and construction activities prior to and after dam removal. 4.8.1 Affected Environment The affected environment for the Proposed Action is composed of the areas along Northwestern Lake (reservoir) and the White Salmon River in the vicinity of the Condit Dam. This would include areas both upstream (e.g., Northwestern Lake) and downstream (e.g., White Salmon River) of the dam. Based on background measurements conducted for similar projects, current ambient noise levels in the vicinity of the Proposed Action are likely between 30 and 40 A-weighted decibels (dBA) (Klickitat County 2005). Exceptions include areas near the dam, major roads, population centers, and industrial areas. In addition, background noise levels would be higher near natural features such as streams and waterfalls. Sensitive receptors in the vicinity of the dam include several residences located immediately north of the dam and between the dam and the proposed concrete disposal site. There are also residences located near the property that would be used to store the wood staves from the flowline. Klickitat County Regulations 1 Klickitat County Code (KCC), Chapter 9.15: Public Disturbance Noises prohibits any person from causing or allowing sound that is a public disturbance noise. Under KCC 9.15.010, public disturbance noises include: • Frequent, repetitive or continuous motor vehicle noise in residential areas • Public address systems operated between the hours of 8:00 pm and 7:00 am • Any loud or raucous sounds within 1,000 feet of a school or medical facility that unreasonably interferes with the operation of the facility or the peace, comfort, or repose of the people within • Sounds from motor vehicle audio systems at volumes audible greater than 50 feet away The following would be exempt from the provisions of KCC 9.15.010 under the specified conditions: • Sounds from horns or sirens when used as a warning of danger or required by law 1 Note that state and local regulations would apply if not preempted by the Federal Power Act. 4.8-1
Condit Dam Hydroelectric Project Final Supplemental EIS • Noise created by safety and protective devices, where noise suppression would defeat the safety intent of the device • Noise created by fire alarms and emergency equipment • Noise created by warning devices not operated continuously for more than 30 minutes per incident • Noise emanating from temporary construction sites between the hours of 7:00 am and 10:00 pm on weekdays, and between the hours of 8:00 am and 6:00 pm on weekdays and holidays The KCC does not regulate specific noise levels. Instead, noise levels emanating from a site or operation would be regulated by Ecology through WAC 173-60. Skamania County Regulations 2 Skamania County has established maximum permissible environmental noise levels, which are found in Skamania County Code (SCC) Chapter 8.22: Noise Regulations, Section 8.22.090: Maximum Noise Levels. The SCC noise limits (summarized in Table 4.8-1) are based on the land use (i.e., Class A – residential, Class B – commercial, Class C – industrial) of the emitting and receiving parcels, the time of day, and the duration of the noise-emitting activity during the loudest hour. The noise limits apply at the closest property line of the receiving parcel, regardless of whether there are any occupied structures or activities at the property line. Table 4.8-1 Maximum Permissible Environmental Noise Levels Duration of Noise Daytime Noise Limit at Receivers (dBA) Nighttime a Noise Limit at Receivers (dBA) Source Residential Commercial Industrial Residential Commercial Industrial Continuous noise (L eq ) b 60 65 70 50 65 70 15 cumulative minutes per hour (L 25 ) c 65 70 75 55 70 75 5 cumulative minutes per hour (L 8.33 ) a 70 75 80 60 75 80 1.5 cumulative minutes per hour (L 2.5 ) e 75 80 85 65 80 85 Notes: Sources: Skamania County Code (SCC) Title 8: Health and Safety, Chapter 8.22 Noise Regulations, Subsections 8.22.090 Maximum Noise Levels and 8.22.100: Deviations from Noise Levels; and Washington State Department of Ecology, WAC 173-60, Maximum Environmental Noise Levels. Listed noise limits apply for Class C (e.g., industrial) noise sources impacting Class A (e.g., residential), Class B (e.g., commercial) and Class C (e.g., industrial) receiving properties. “Nighttime” is defined as 10:00 pm through 7:00 am. a. L eq = equivalent sound level over the given noise measurement period 2 Note that state and local regulations would apply if not preempted by the Federal Power Act. 4.8-2
Page 1 and 2:
Condit Dam Removal Final SEPA Suppl
Page 3 and 4:
March 23, 2007 Dear interested part
Page 5 and 6:
Condit Dam Hydroelectric Project Fi
Page 7 and 8:
Page 9 and 10:
Page 11 and 12:
Page 13 and 14:
Page 15 and 16:
Page 17 and 18:
Page 19 and 20:
Page 21 and 22:
Page 23 and 24:
Page 25 and 26:
Page 27 and 28:
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
Page 35 and 36:
Page 37 and 38:
Page 39 and 40:
Page 41 and 42:
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
Page 49 and 50:
Page 51 and 52:
Page 53 and 54:
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
Page 61 and 62:
Page 63 and 64:
Page 65 and 66:
Page 67 and 68:
Page 69 and 70:
Page 71 and 72:
Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
Page 79 and 80:
Page 81 and 82:
Page 83 and 84:
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Page 93 and 94:
Page 95 and 96:
Page 97 and 98:
Page 99 and 100:
Page 101 and 102: Condit Dam Hydroelectric Project Fi
Page 151: Condit Dam Hydroelectric Project Fi
Page 201: Appendix A Memorandum of Agreement
Page 207 and 208:
Appendix C Supplemental Aquatic Res
Page 209 and 210:
Page 211 and 212:
Page 213 and 214:
Page 215 and 216:
Page 217 and 218:
Page 219 and 220:
Page 221 and 222:
Page 223 and 224:
Page 225 and 226:
Page 227 and 228:
Page 229 and 230:
Page 231 and 232:
Page 233 and 234:
Page 235 and 236:
Page 237 and 238:
Page 239 and 240:
Page 241 and 242:
Page 243 and 244:
Agency and Organization Letters and
Page 245 and 246:
Agency and Organization Letters Con
Page 247 and 248:
Contents Public Meetings Response P
Page 249:
Contents Individuals Individuals A-
show all

Condit Dam Removal Condit Dam Removal - Access Washington

Create successful ePaper yourself

Delete template?

Save as template?