2002-10-29_REVISION - M2001085 - Laserfiche WebLink

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10/29/2002 08:16 3036703522 PermitNumber ~'tQ-ZOaI-Q~ 17y~'~}zti~ piA.o Class: ^Pennit Section/Exhibit i Class:[~Revision _._._._._._._._._._._._._._._._._.-._._._._._._. _.~ iypelS_eq : ~~ Class: ^ Report 0 Hydro General ~~~ ~ ~~u-~~~~--^'J"`~~ Doc Type: Application (Coal only) ^ Bontl ^ Enforcement ^ Inspection October 2g, 2002 ~ _ - __ _ _ _ , Ms. Erica Crosby Colorado Division of Minerals and Geology 1313 Shettnan St., Room 215 Denver, Colorado 80203 Subject: Response to Comments from Objectors and Other Agencies Regarding Application to Amend (AM-Ol ), Adams County RV Park, LLC, dba 124'" Estates Partners, File No. ~~- .~ M-z~(- o&S Dear Erica, Following is the Applicant's response to your letter of Ocmber I7, 2002, which contained correspondence from two objectors and two commenters regarding the Application to Amend Permit No. M-2001-085. Letter of Objection from Bob and Terrie Hanson According to the on-line property profile of the Adams County Assessor's Office (attached), the residence at 1100] E. l20`s Avenue was built in 1953. q»d, according to records of the Colorado Historical Society (attached), an assessment of property at 11061 E. 120s' Avenue (adjacent and south of the Hanson property) occurred in March 1994, showing that the residence at that address was built in the late 1800s or early 1900s. The older home at 1 1061 E. 120`" Avenue (Schibli property) wasjudged as officially not eligible for consideration as a historic site. It is now abandoned and in deteriorating condition. The proposed access road will be located a minimum of 100 feet from the east and north properly boundaries of the Hanson property. There will be almost no probability of damage to foundations caused by vibration at that distance. Conservatively, vibration measured at a peak particle velocity of 1 - 2 inches per second represents the potential threshold level for damage to light residential structures. The type of damage that occurs at this level of vibration would be minor plaster cracking. Most literature on the subject appears to address the impacts caused by short and intense episodes Of vibration such as that caused by explosives and a wrecking ball. The literature does suggest, however, that the less intense and more steady vibration caused by rolling trucks would not approach a level that could cause even minimal damage to light residential stmctures. Attached to this letter is a figure from the Journal of the Construction Division of the ASCE (W iss J.F., Vibrations During Construction Operations, ]oumal of the Construction Division, ASCE, V. 100, No. CO3, Sept. 1974 (239 - 246) that shows expected peak particle velocity versus distance for a variety of construction activities. It does show that one pound of dynamite at 100 feet will cause peak particle velocities near 1 inch per second, approaching the threshold for minor damage. The figure also includes a projection of vibration caused by trucks and heavy bulldozers; and although it does not appear to take into account the varying rigidity of soils, and it does not distinguish between a single truck or many trucks tolling simultaneously, the figure suggests that peak particle velocities resulting from trucks and large bulldozers will be approximately .Ol inches per second at 100 feet.