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Design and Construction Notes By David W. Uoyd, P.E. Chid; Design lOll CoosIruclioo Program 1997 saw the design and constnJction program committing over $6.3 million to design and constnJction projects by year end. Most of this funding has gone toward constnJction as well as initiation of several new design projects. The Dutch Creek project in the Town of Columbine Valley was completed this year at a cost of approximately $1.45 million. The project consisted of open channel improvements through the Columbine Country Club and a bridge replacement at Fairway Lane. The project has removed over 50 homes from the 100- year floodplain. The first phase of improvements along Drainageway A in the City of Louisville was completed this past year. This outfall project, consisting of w- inch storm sewer, provided much needed upgrades in existing capacity at Highway 42 and the Burlington Northern Sante Fe Railroad. These improvements along with planned detention pond modifications at Lake Park and the Louisville Middle School, scheduled for 1998, will create a system capable of handling the lOO-year event, thereby eliminating a large area of downtown Louisville from the lOO-year floodplain. Two projects completed in cooperation with Arapahoe County this year were a much needed drop structure along Cherry Creek upstream of Iliff Avenue; and Pond L-3, a regional detention and water quality pond along Lone Tree Creek. The City ofLakewood and the District continue with much needed improvements along Dry Gulch. This year a detention pond along the North Tributary of Dry Gulch at 14th and Lamar was constructed to provide some relief to the existing undersized downstream conveyance system. Next year, Lakewood and the District intend to purchase the property needed for constnJction of yet another detention STATUS OF DISTRICT DESIGN PROJECTS I Pro' eet _ Lake N./Beor Cr. Puk lWolooILeyden Feasibility Van Bibbee Final Design EastIW: No.3 Ooooe er.ck PIwe 3 Niva- Creek. Tributary L Lobwood Gulch Tom Froct Dden1.ion Utt1e Dry Crock PIwe C Utt1e Dry er.ck RR CrooWngo Muoey Draw at Carr St. leweU WctllOd DctcnIioa Utt1.. er.ck Willow Creek McKay Outfcl1 Pleasant View Trib. to Lc:oa Rangovicw Gulch Wcat<rly Cr.@ExpoPark Orccuwood Gulch Partici atin Jurisdiction s Dcov<< Arvada, Corps ofEnginccn Arvada, Corps ofEnginccn Tbomtoo BouIdcr Tbomtoo Den_ Broomfield w--..... Moms County 1cffcnoo County Aurora Utt1_ Arapahoe County Arapahoe County Moms County lcffcnoo County Utt1ctoo Aurora Orccuwood Vil! Status 45% Complete On hold 90% Complete Complete 15% Complete 10"" Complete Complete Complete Complete Complete 95% Complete 95% Complete 95% Complete Complete 10"" Complete 7S% Complete 50% Complete 20% Complete I... !! 1 ~ 1 STATUS OF DISTRICT CONSTRUCTION PROJECTS Pro' ect Jurisdiction s Cost Status Chcny Cr. Drop at Ui1f Arapahoe County $475,000 95% Complete Looc T.... Cr. Pood1.-3 ArapahoeCounty 700.000 95%Complete 1-25/46th & Pcoos I'lL IV lOll V Denver 1.200,000 95%Complete Dutch Creek eolwnbinc Vcl1ey 1,450,000 Complete Lena Gulch Schcdu1e V Wheat Ridge 585,000 Complete West Evans I'lL 2 Denver 500,000 95% Complete Monaco/Eastman Outfall Denver 800.000 95% Complete Bi8 Dry Cr. at Windermere Englewood 450.000 Complete Dry Gulch at 14. lOll Lamar lAewood 350.000 95% Complete Drainageway A Louisville 760,000 95% Complete Lower IWstoo Cr. Arvada 2.670,000 Complete Bear Crock Boulder I 700 000 5% lete pond on the North Tributary of Dry Gulch at 16th and Dover. The District had an opportunity this past year to participate with two communities in the purchase of flood prone properties and the subsequent removal of structures located on those properties. The Boulder and Adjacent County Drainageways Master Drainage Plan identified a property at 1650 Alpine Avenue along Goose Creek as being particularly susceptible to flood damage. The District participated with the City of Boulder in the acquisition of this property and the removal of the structure. The City has since tomed the property into a pocket parle Another flood prone property at 801 W. Powers Drive along Slaughterhouse Gulch in the City of Littleton was identified in the Slaughterhouse Gulch master plan which recommended removal. The District and City of Littleton cooperated in the acquisition of this property and the removal of all structures on the property. The District frequently cooperates with local governments and provides cost sharing for the acquisition and removal of flood prone properties . Dutch Creek throu~h Columbine Country Club golf course. 4