FLOOD06350 - Laserfiche WebLink

Home Browse Search

zonin<j Selective zoning constitute~ a legal tool that can be used to implement and enforce the detailed plans resulting from a land USe planning program and enSUreS the ~st beneficial use of flood plain land~ while safeguarding the safety, health, and welfare of the total community. Designated floodways may be reserved by e~tabli~hing encroachment lines that clearly define the floodway zone. The utilization of flood plain lands adjacent to the floodway is lLmited only by the degree of flood riSk deemed allowable (a de- termination of local government) and the requirements of the City or County zoning criteria for the area. 8y general definition, a floodway is that ~ection of the flood plain area provided to convey a design frequency flood ~o that remaining sections of the area Can be used more economically. The "design flood" often selected in connection with floodway determina- tion~ is the lOO-year frequency Intermediate Regional Flood. In te~s of maintaining a reasonable balance between the advantages of reducing potential flcod losses and the disadvantages of overly re- stricting land use, this flood's heights and areal limits are consid- ered most practical for use in gaining the goals SOught through selective zoning. To maximiz<l the an!s avaihble for economic develop- ment, a floodway les~ wide than that required for the unconfined flood can be designed to convey flood flows with an allowable rise Subdivision Regulations Subdivisio~ regulations are used by lceal governnents to specify the manner in ",hic/1 lar.ct may be divided. They ~ay prescribc the ",idth of streets, curb and gutter requirements, lot si~es. eleva- tions of land to avoid flooding, size of flood",ays, and other require- ments affecting the welfare and safety of the cormunity. These regu. lations provide an effective means of controlling cons~ructicn and preserving floodways in presently undeveloped flood Plain areas. . Building Codes Building codes, in addition to the more conventional construction standards set forth, stould also specify provisions that assure the structural integrity of buildings d~ring flood periods. Requirements to reduce flood damages include elevation control, con- siderations of strength and deterioration. s~scepti~ility involving materials, proper anchorage, and floodproofing criteria. of not ~re t~~n One foot above the unconfined flood's "~ter surface Floodproofinq Floodproofing measureS can be effectively applied to h>th existing and proposed st.-uctures in rela~ivcly lo~'~risk ha~ard "reas. These:nay include land filling and ele""tionof structures, site adjustments. and structural design c~anges that reduce damage VLllnerability. elevation. In such event, developments in the fringe area would need to be rdis~ on fill, or be otherwise protected by floodproofing, to the design water surface elevation of the floodway. Cities and counties within Colorado are authorized to en"etand enforce land use controls. Il.ssistance and guidance on the enactment of resolutions, ordinances, and regulations that relate to l!ealthRegulations These regulations can serve ~o control ~he use of flood plains for "'aste disposal and the construction of "'ater and sewage treatment facilities whQse locations may creato health problems during floods. flood plain management io available from the Colorado Water Conserva- tion Board, D~nve~, Colorado. . f'oreco.sting and Evacuation Accurate, timely forecasting of floods and critical strea~ . " "