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OR~f1 to the Blue River. As development occurs in the area of these drainages, the issue of providing a draingeway across the dredge spoils becomes more critical. First of all, although smaller return period floods are readily infiltrated into the dredge rock, floods on the order of the IOO-year may not. Additionally, the areas that the flows infiltrate into will become increasing sealed off with sediment and debris. It is only a matter of time until the dredge spoils can no longer infiltrate major runoff events. As development increases, the area available for infiltration will also be reduced due to buildings, pavement and placement of topsoil. Therefore, it is critical that drainageways be set aside now, prior to development. These drainageways should be designed to convey a storm of at least the lOO-year magnitude. This is not the design standard for areas that currently fall within the jurisdiction of Summit county rather than the Town of Breckenridge. The County standard is usually the 25-year storm. In the case of Cucumber Creek, the Town could incorporate the channel as part of an amenity to the existing park. It is highly recommended that the flows be kept in open channels rather than conveyed in pipes, as in the case of Sawmill Gulch, across the dredge spoils. Placing long sections of the flow in closed conduits destroys aesthetic and environmental characteristics of the stream as well as creating a system with eventual high maintenance costs. In order to be able to provide for future open channels, the right-of-way needs and general design concepts must be determined at the present rather than after development occurs and greatly limits the available options. The area along Gold Run gulch is used primarily for the Breckenridge Golf Course or low density development. , The major area that would currently be subject to damage during a flood would be the golf course. However, due to lack of topographic mapping to reflect the as-built conditions of the golf course, it is difficult to determine the extent of possible damage. The area that would be most susceptible to damage would be the maintenance shop and surrounding pond system. These ponds do not have spillways and in the event of the IOO-year flood, could be damaged by flows overtopping their embankments. It is recommended that a detailed study of at least the area where Gold Run Gulch flows through the maintenance building area be performed. Local Drainaae Problem Areas Local drainages are commonly considered basins with less than one square mile of area. Within the MPA this includes three named drainage, the Klack, (310 ac), Lomax Gulch (92 ac) and Jones Gulch (470 ac): urbanized areas within the MPA which drain to the major drainages: and small local areas which drain directly into the Blue River. 43