1982-02-18_GENERAL DOCUMENTS - M1981302

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Staff Recommendation Docket #SU-81-10 November 13, 1981 Page Ten 1) There are no alternatives to the existing Table Mesa Drive access which is proposed as the north haul route. 2) Conditions at the intersection are only marginally acceptable at the present time. 3) The addition of the proposed number of haul trucks will make conditions at the intersection clearly unacceptable. 4) The applicant should participate in the installation of an inter- connected traffic signal at the intersection and hauling operations from the Deepe Pit should not begin until the signal is installed. The only alternative to a signal is suggested by the City Transportation Dept. This is to limit access at the haul road to right turn in and right turn out. The "right-turn-in" limitation would mean that empty trucks would have to return from the west on Table Mesa Drive. Staff does not feel that this would be an acceptable alternative. The State Highway Dept. has ultimate control over the installation of the traffic signal . Copies of new studies and information have been sent to them. Their response is not available at this time, but a written response has been requested in time for the Planning Commission meeting. South Haul Road As discussed under noise concerns, staff is recommending that the south haul road be eliminated until such time as an acceptable alternate route and mitigation measures are proposed. Public Works has noted that the 23-load-per-day maximum projected in the applicants' transportation studies is acceptable from a traffic design standpoint. Their previously stated concerns with the condition of Old Marshall Road would remain. With regard to the alternate (closed-off) SH 93 access , although Public Works has indicated they do not support reopening of this access, the authority to allow access onto the highway lies with the State Highway Dept. The applicant could seek a driveway permit and a variance from the state access code from the highway department. If a driveway permit was granted, the state would likely require certain improvements, such as a southbound (left-turn) accel lane, a northbound accel lane and signing. If 23 loads is actually the maximum number of loads per day tht would use this route, it would be questionable as to whether the limited use would be cost effective for the applicants. This alternate, or any other alternate routes and mitigation measures , could be formally reviewed in the future as an amendment to the Special Use. Dust Previous monitoring of average increases in Total Suspended Particulates (TSP) associated with mining at the White Rocks Pit and studies done for the Deepe Pit show that the mining will not significantly increase average TSP levels or violate standards for TSP over the long term. A separate study on health impacts shows that even under the most conservative "worst case" circumstances, the health of area residences will not be affected. The above has been confirmed by Mark Parsons of the County Health Dept. and another expert whose comments were requested by area residents.