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Design and Construction Program Notes
by
David W. Lloyd, P.E., Chief, Design and Construction Program

STATUS OF DISTRICT DESIGN PROJECTS

Project

Participating Jurisdiction(s)

Status

North Tributary of Massey Draw

Jefferson County

Complete

Lakewood Gulch @ Welchester Park

Jefferson County

Complete

Drainageway G

Jefferson County

Complete

Cottonwood Creek

Arapahoe County

Complete

Happy Canyon Creek

Douglas County

Complete

Brookridge/Grant Outfall

Arapahoe County

Complete

Cherry Crest West Outfall

Arapahoe County

Complete

Erie Drainage

Erie

Complete

Leyden Dam

Arvada

Complete

McKay Outfall

Adams County

95% Complete

Pinehurst & Academy Park Tribs

Denver

95% Complete

Plaster Reservoir Detention

Broomfield

90% Complete

South Lakewood Gulch

Lakewood

50% Complete

Kalcevic Reservoir

Adams County

35% Complete

Lena Gulch @ Mountain Side

Jefferson County

30% Complete

Parker/Jewell Outfall

Arapahoe County

25% Complete

Arvada Channel

Arvada

20% Complete

Little Willow Creek

Douglas County

10% Complete

Sand Creek Stapleton to Toll Gate

Aurora

  5% Complete

Sulpher Gulch

Parker

  5% Complete

The year 2001 saw us committing over $8 million to design and construction projects by year-end.  Most of this funding has gone toward the construction of several new projects as well as the continuation of projects started in past years.  One notable change to the Design and Construction Program was the addition of Ken MacKenzie as Project Engineer effective February of this year.  After several years of trying to manage 80 to 90 projects each year, Paul and I are grateful for the assistance that Ken is now giving us.  We are currently working toward dividing the District by county with Paul responsible for Douglas and Arapahoe Counties, Ken for Denver and Jefferson Counties and myself for Adams and Boulder Counties.  We thought it advantageous to have local governments dealing with only one point of contact for capital projects.

STATUS OF DISTRICT CONSTRUCTION PROJECTS

Project

Jurisdiction(s)

Cost

Status

Westerly Creek @ Expo Park

Aurora

$3,400,000

Complete

Meadowood Creek

Aurora

3,204,000

Complete

Cherry Creek Drops

Glendale

700,000

Complete

Grange Hall Creek Phase 2/3

Northglenn

1,506,000

Complete

Weaver Creek @ Simms

Jefferson County

1,020,000

Complete

South Trib.  Slaughterhouse Gulch

Littleton

837,000

Complete

Twenty Mile Detention

Parker

795,000

Complete

Lakewood Gulch @ Perry

Denver

1,136,900

Complete

Big Dry Creek Trail

Littleton, Englewood

715,000

Complete

Virginia Village Outfall Phase 1

Denver

1,230,000

Complete

Valley Club Outfall

Arapahoe County

1,400,000

Complete

Pleasantview Tributary

Jefferson County

281,000

Complete

Shaw Heights Trib. Phase II

Westminster

638,000

Complete

Goose Creek

Boulder

3,803,000

95% Complete

Bear Creek Maintenance Access

Morrison

817,300

95% Complete

Leyden Dam

Arvada

1,604,000

95% Complete

Little Dry Creek RR Culverts

Adams County

3,200,000

95% Complete

Niver Trib. M Outfall

Federal Heights

172,000

95% Complete

Marcy Gulch

Highlands Ranch

1,800,000

90% Complete

Lemon Gulch

Douglas County

815,000

90% Complete

Cottonwood Creek

ArapCo, Greenwood

1,360,200

85% Complete

Dad Clark Gulch

Highlands Ranch

523,000

80% Complete

Wonderland Creek

Boulder

575,000

80% Complete

Indiana St. Outfall

Lakewood

950,000

75% Complete

Virginia Village Phase II

Denver

789,000

50% Complete

A number of unique projects were constructed this past year including some which had been many years in the planning and design process.  The Little Dry Creek Railroad Culverts project in Adams County was completed this year.  Design of this project was initiated in the early 1980s and it took several years of negotiations with the Burlington Northern Santa Fe Railroad before final agreement was reached in late 2000.  Hats off to Adams County for their persistence in bringing this project to fruition.  Adequate conveyance is now available to carry 100-year flows between Federal Boulevard and Clear Creek; and a much needed trail connection is now in place along Little Dry Creek from Arvada and Westminster to the Clear Creek trail corridor.

Acquisition and construction of improvements to Leyden Reservoir were also completed in 2001.  This was a joint project with the Cities of Arvada and Westminster.  Acquisition of the property and the commitment of funding for the improvements took a yeoman effort on the part of the City Managers of Arvada and Westminster, as well as the Jefferson County Administrator.  The improvements consisted of construction of a 380-foot wide spillway over the top of the existing 40-foot high dam.  The new spillway is capable of safely passing 75% of the Probable Maximum Flood.  Unique to this project was the use of roller compacted concrete to construct the spillway.  Leyden Dam will now fully detain the 100-year event cutting approximately 2,000 cfs from the previous master plan release of approximately 2,200 cfs.  We are just now starting the Letter of Map Revision process for what we anticipate to be significant impacts to the downstream floodplain along Leyden and Ralston Creeks.

Looking upstream at the new Perry Street bridge along
Lakewood Gulch.
Goose Creek form liner detail.
Constructing a soil cement drop structure on Marcy Gulch.

The third and final phase of Grange Hall Creek was completed this past year in the City of Northglenn.  The uniqueness of this project was in the nineteen drop structures constructed along Grange Hall Creek and its North Tributary.  These two and four foot drops were constructed of concrete utilizing a reinforced concrete substructure with a colored shotcrete covering.  After application of the shotcrete, the finished surface was sculpted to give the appearance of a rock outcrop.  These “feaux” rock structures have been getting considerable attention in the metropolitan area and we anticipate using them on other projects.  The Grange Hall Creek Project received the Grand Award at this year’s Annual Conference of the Colorado Association of Stormwater and Floodplain Managers.  Congratulations to the City of Northglenn and Muller Engineering for their fine work on this project.

Yet another phase of Goose Creek in the City of Boulder was completed this past year.  Unique to this project was the use of a very intricate form liner, which gives the appearance of a rock wall.  Coloration was added to the individual “concrete” rocks to enhance the appearance of the wall.  The final phase of the Goose Creek channel improvements was bid by the City of Boulder in late 2001 and should be starting early in 2002.  This will conclude a multi-year multi-phase project that was initiated in the mid-1980s.  The resultant 100-year channel improvements will remove a number of properties from the floodplain.

The year 2002 looks to be very busy with funding identified in the 5-Year Capital Improvement Program for 40 new or existing projects.


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