FLOOD06450 - Laserfiche WebLink

Home Browse Search

The Ralston Creek basin at its confluence with Clear Creek con- tains 91 square miles. The 1 percent flood (1 DO-year) is of destructive magnitude given the significant development of the flood plain in some areas. The studies show the 1 percent flood to be 10,000 cubic feet per second within Arvada for future de- velopment with the improved channel without detention on Van Bibber Creek. Early warning plans and arrangements are part of the overall recommendations. Overall, the master plan calls for a corrective program costing $13.2 million in terms of 1977 dollars. Some $9.9 million of this program is in Arvada and $3.3 million is in Jefferson County. Douglas T. Sovern, J. Craig Green, and Leander Urmy of our staff have made a concentrated team effort in completing this study. Arvada and Jefferson County have input heavily to the study. We have appreciated the opportunity to undertake this study. We remain available to help implement this master plan. I WRIGHT-McLAUGHLIN ENGINEERS ENGI NEERING CONSULTANTS COMPI-ElE ENGINEERING SERVICES IN THE THE SPECIALlY nELOS OF RONALD C, MCLAUGHLIN KIONNETH Fl. WRIGHT HALFORD E. ERICKSON DOUGLAS T SOVERN WILLIAM C TAGGART THOMAS W MORRIS Z420 ALCOTT STREET DENVER. COLORADO 80211 0303,4'513-6201 WATER SUPPLY AND DISTRIBUTION WATER AND SEWAGE TREATMFNT SEWAGE COLLECTION AND REUSE STORM DRAINAGE FLOOD CONTROL AND OTHER WATER-ORIENTED PROJECTS ,I A.SPe:N POBOX 6028 ASP!: 1'1, COLORADO 816 I I GLENWOOD SPRINGS PO. BOX IZ86 GlENWOOD SPRINGS COLORADO 81601 JIMMIE:: D. WHITFIELO JOHN T MCLANE DAVID J LOVE RONALD B CLONINGER I I I I September 16, 1977 Mr. L. Scott Tucker, Executive Director Urban Drainage and Flood Control District 2480 West 26th Avenue, Suite lS6-B Denver, Colorado 80211 I 1 RE: LETTER OF TRANSMITTAL I Dear Mr. Tucker: I The master planning effort for Ralston Creek and Leyden Creek is summarized in this report in accordance with our contract dated October 1, 1974. I This text includes a summary of the Phase A report, so that the background material is available for the reader's convenience, Section I presents an executive summary that describes the general study and results. I Yours very truly, The master plan for Ralston and Leyden Creeks represents a combin- ation of flood control management methods ranging from merely flood plain regulation to concrete side-walled European-type channels. Each portion of the two streams was studied separately and the best solution was selected in conjunction with local government representatives. I By I The recommended plan for Ralston Creek and Leyden Creek flood hazard management is based upon minimizing the hazard to life and property along the full reach of the creeks, in harmony with providing reason- able and useful amenities consistent with accepted urban and rural planning principles. By I KRW:ms Attachment 742-S9B ~t1TnJm ~:\\\ ROBE/"t~>1), ,,~~~..tGisH-~~..Jj)1%~ r.~0~.. ~ .o-.~. ':. .- .. ~~ . . ~ ~ : 3084 ~ =-. ~:.. ",: 3 .'%1 ",_ *-< -.0-<, ~.: $ -.(1'.5' ~... ~ oa1i;!:r;~A.L. ~~s;.e~~...';' ~".{.. OF CO'-Cl"'~'" ~'UUly.JP: I The master plan includes the relocation of approximately 60 perman- ent residential structures and S4 mobile homes. These homes are in the flood plain of Ralston Creek. For the most part, their removal is required to obtain room to construct a concrete walled channel through a residential area subject to heavy flooding. I I I STEAMBOAT SF'RINGS P,o. BOX ~220 STEAMBOAT VILLAGE. COLORADO 80499 LEAD/DEADWOOD 9-:3 SHEIlM"'" DEADWOOD SOUTH DAKOTA 57732 Partner -==-...~ ...;>-->>JoHlv~h ;;:--S,"> ...... . ("l~ 2: ~ ..~(,\'~TEftt"J.. 0,"". . :1<:::)"~ . ~ i*(~ 14114 ~~E~~ 1I...f'o ~. (~~","'J' ~0"'"", ""X.'~/ONAL ~..'.5) " oi"co\.~~r \~.....-=--S:S->- /