FLOOD03506

• County: Jefferson
• Community: Lakewood
• Stream Name: South Lakewood Gulch
• Basin: South Platte
• Title: Major Drainageway Planning
• Date: 8/1/1978
• Prepared For: Lakewood
• Prepared By: UDFCD
• Contract/PO #: &&
• Floodplain - Doc Type: Floodplain Report/Masterplan

COMMENTARY ON SHEET 1

ESTIMATED CONSTRUCTION COST

The City of Lakewood has proposed a park from Kipling Street to Garrison

Street within the existing Addenbrooke properties. Plans for the develop-

ment of this area are in the conceptual stages and as such the incorporation

of the existing Addenbrooke Pond is not finalized. A total retention

storage facility has been proposed at the eastern edge of the property at

Garrison thus eliminating the need for additional flood storage at the

existing Addenbrooke Pond. However, the existing pond could provide a source of

park irrigation water as well as being a waterscape amenity for the park

itself. South Lakewood Gulch could be slightly regraded to meet park grading

plans however, the final channel would be floodplaiM delineated through

this area. Transbasin diversion of storm flows would not be allowed. Sheet

I shows the extent of this floodplain delineation if the existing grading

is utilized in this portion of the proposed park.

Item

Abandon Waste Ditch

Agricultural Ditch Flow Separation Structure

TOTAL CONSTRUCTION COSTS

Engineering and Contingencies (25% Construction Costs)

Fiscal, Legal, and Administrative (8% of Total Above)

An underground flow separation structure would be constructed at the Agri-
cultural Ditch crossing immediately upstream of the existing Addenbrooke
Pond. This structure allows all South Lakewood Gulch flows to be carried
over the ditch while limiting the ditch to its decreed flow capacity.
Storm waters in the ditch that are in excess of the decreed ditch capacity
would be forced to dump into South Lakewood Gulch. The waste ditch just
east of Kipling is currently planned to be abandoned and as such no improve-
ments are proposed with the exception that it be breached at the gulch.

Land Acquisition Cost

TOTAL COST

Annual Maintenance Cost

The 100-year floodplain is to be regulated and it is recommended that the
residents within and adjacent to the 100-year floodplain be notified annually
of the potential flood hazards.

*

Costs of Abandonment of Waste Ditch to be borne by ditch company.

**

Land owned by City of Lakewood Parks Department

Cost
-0-*
$ 8,000
$ 8,000

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$ 2,000

$ 1,000

-0-**

$ 11,000

$

300