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COLORADO WATER CONSERVATION BOARD 721 Centennial Building 1313 Sherman Street Denver, CO 80203 April 1978 Revised March 1986 Revised November 1992 Specifications for Photogrammetric Services For Floodplain Studies in Colorado 1. GENERAL PROVISIONS The purpose of these photogrammetric services is to provide the mapping and cross-section data required to prepare a floodplain information report for use in the administration of the floodplain areas. The contractor shall consider the terms of these specifications binding unless otherwise provided in the memorandum of instructions. The contractor shall be responsible for the professional quality, the technical accuracy, and the coordination of all designs, drawings, and realized specifications in the photogrammetric field. The contractor shall, without additional compensation, correct or revise any errors or deficiencies in his designs, drawings, and other services. The contractor agrees to provide all materials and labor and shall obtain the rights of ingress and egress for the performance of work as delineated by the Colorado Water Conservation Board (CWCB). II. LOCATION The area to be mapped is shown on the attached map. (See Attachment F). III. SPECIFICATIONS A. Photography. Photography shall be undertaken only when well-defined images can be obtained. Photography shall not contain shadows caused by topographic relief and sun angle whenever such shadows can be avoided during the time of year the photography must be taken. Photography shall be undertaken when the sun angle is less than 300 above the horizon. Crab or drift shall not affect more than 10% of the 9" x 9" negative width for three consecutive photographs. Tilt shall not exceed 30 for a single exposure. All photo-control data shall remain shown in the photo-print margin.