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<br />CDM
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<br />CAMP DRESSER & McKEE INC.
<br />
<br />CAMP DRESSER & McKEE INC.
<br />
<br />environmental engineers, scientists,
<br />planners, & management consultants
<br />
<br />Writer's Tower, Suite 1100
<br />1660 South Albion Street, Denver, Colorado 80222
<br />303758-4351
<br />
<br />Mr. L. Scott Tucker
<br />December 3, 1980
<br />Page Two
<br />
<br />December 3, 1980
<br />
<br />Mr. L. Scott Tucker
<br />Executive Director
<br />Urban Drainage & Flood Control District
<br />2480 W. 26th Avenue
<br />Suite 156B
<br />Denver, Colorado 80211
<br />
<br />Lafayette Basinwide Planning
<br />Phase B Report
<br />CDM 611-1 Q-RT
<br />
<br />Dear Mr. Tucker:
<br />
<br />In compliance with the terms of our contract with Urban Drainage and
<br />Flood Control District, dated July 9, 1979, we have prepared a pre-
<br />liminary design report for the City of Lafayette and Surrounding
<br />Boulder County Basinwide Master Plan. This report includes a ~urther
<br />detailed examination of the alternate plan selected by the proJect
<br />sponsors, and a drainage and flood control preliminary design for the
<br />selected alternate plan in sufficient detail for planning and pro-
<br />ceeding with final design plans and specifications.
<br />
<br />The selected plan includes channel improvements for the 10- and
<br />lOG-year frequencies, underground conduits and box culverts for
<br />each major sub-basin delineated during the course of the Phase B
<br />study. The estimated total cost of the Basinwide Master Plan
<br />improvements is $8,763,809 which includes the costs for land
<br />acquisition, engineering and contingencies, fiscal, legal and
<br />administrative expenses. A breakdown of these costs are presented
<br />for each of the plan drawings,
<br />
<br />It is recommended that the initial expenditures be made for the
<br />acquisition of drainage right-of-ways in each major sub-bas~n,
<br />the construction of Major Drainageway 3 and the road and ral1road
<br />crossings necessary for Drainageway 3. The most significant
<br />effect of the Stage 1 improvements will be to provide future
<br />development in the City of Lafayette and in adjacent areas of
<br />Boulder County with a means to plan for the future major drainage
<br />improvements to prevent the increasing f1?oding dama~e potential
<br />that urbanization will create. Constructlon of the lmprovements
<br />recommended in ~lajor Sub-basin 3 is suggested in Stage 1 in order
<br />
<br />to eliminate the frequent local flooding problems along the Emma
<br />Street Ditch and in the lower agricultural areas of the basin.
<br />~"'. Finally, the construction of the channel crossings for Major
<br />_,,;,_,~>.-r' Drainageway 2 under Weld County Road and under the Chicago
<br />~r~c Burlington and Quincy Railroads will provide future development
<br />W,'- I' " in Major Sub-basin 2 a means of conveying stormwater to Coal
<br />
<br />\. ..\ \. \I \9'6\ Creek.
<br />
<br />\. .\~\\' . It should be stressed that the Basinwide Plan developed in the
<br />b\.,~ "\\ 0,,"""'eOI\RU Phase B study assumes that the land development process will .
<br />C\J-\If',I\ON recognize the need for an overall drain~ge mas~e~ plan that wlll
<br />CONStR serve existing and future ur~an needs wlth effl~lent s~ormwater
<br />, management and flood protectlon. A close compllance wlth the
<br />Storm Drainage Design and Technical Criteria for the City of
<br />Lafayette and Surrounding Boulder County developed in conjunction
<br />with the Basinwide Drainage Plan will aide greatly in establishing
<br />orderly land and storm drainage planning that will assure existing
<br />and future development adequate storm drainage facilities.
<br />
<br />We wish to acknowledge with thanks the cooperation and assistance
<br />of Mr. Ben Urbonas of your staff, Mr. Warren Williams of the City
<br />of Lafayette, and Mr. Mike Ser1et of Boulder County in preparing.
<br />this Basinwide Master Plan for the City of Lafayette and Surroundlng
<br />Boulder County.
<br />
<br />Very truly yours,
<br />
<br />CAMP DRESSER & McKEE INC.
<br />
<br />1?~---P U. (JC.A-<'~
<br />~bard ~. Wray (J
<br />Project Manager
<br />
<br />Approved:
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<br />
<br />'Wayne T~,. Fi sher
<br />Senior~ice President
<br />
<br />WTF /RNW/rms
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