GENERAL35311 - Laserfiche WebLink

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Additionally, the CONTRACTOR shall understand that the actual existino topography of areas to be regraded may vary from that shown on Exhibits 3A, 3B, 6A, 6B, and 6C. The CONTRACTOR is solely responsible for determining and verifying the existino topography of the site and determining the amount and type of earthmovina required to achieve the topographic configuration depicted on Exhibits 4A, 46, 6A, 6B, and 6C prior to submittal of the bid, The existino topography of the disturbed area as shown on the exhibits was determined by measuring slope lengths with a steel tape and slope angles with an abney level and Brunton compass. The highway and rail line were used as the control points from which measurements were taken. Section III.5.2.D - Working Area Limits Ex i it Copy attac a as een revised to more accurately depict the location of the coal stockpile area and the working area limit boundary line around the southeast perimeter of the stockpile area. Additionally, Exhibits 5A and 56 (copies attached) have been revised to differentiate established shrub/tree stands and other undisturbed areas where no construction activities are allowed (novlabeled as "NS" areas) from other disturbed areas where no cut and fill work is required but where other construction activities such as ripping and structural demolition are. allowed (labeled as "N" areas). Section III.7.2.A - Culvert Removal/Modification CMP-2, CMP- ,and CMP- An additiona specification hereby added to these bid items is that all riprap material used to line the drainage ditches shall be durable rock only and not composed of any man-made materials such as concrete. CMP-8: An additional work option hereby made available to the CONTRACTOR under this specification allows a new 30" diameter CMP section to be installed across the highway to connect the two constructed drainage channels, rather than locating and using the existing in-place portion of the bypass culvert presently passing beneath the road. A recent closer inspection of what was thought to be an access manway to the bypass culvert revealed the presence of a small pipe and sate valve approximately 8 ft. below the lip of the vertical CMP, however the bypass CMP could not be located. As such, the precise orientation and depth below grade of the bypass CMP could not be determined. If the CONTRACTOR elects to install a new culvert segment across the highway, all Highway Department regulations covering installation of culverts shall be complied with, including minimum distances between inlet and outlet ends from the road surface, minimum drainage gradient, minimum depth below the road surface, compaction of the fill above the culvert, and re-establishment of road base and road pavement. Exhibits Exhibit 3B - Existing Topography, Facilities, and Electrical Utility ocat~ ions: The attached copy of this exhibit replaces the one contained in the October 2b, 1989 bid package. This exhibit has been revised to more accurately delineate the coal stockpile area and the working area limits boundary around the southeast portion of this area. -3-