FLOOD10385

• County: Jefferson
• Community: Golden, Lakewood
• Stream Name: Upper Lena Gulch
• Basin: South Platte
• Title: Major Drainageway Planning - Upper Lena Gulch - Phase B Report
• Date: 3/1/1994
• Prepared For: UDFCD
• Prepared By: Boyle Engineering Corporation
• Floodplain - Doc Type: Floodplain Report/Masterplan

TABLE 9

SUMMARY OF RECOMMENDED PLAN COMPONENTS

Estimated
Construction
Reach Plan ComDonent Cost 110
L-13 o Install Erosion Control Check Stmctures 318,900
L-12 o Install Erosion Control Check Stmctures 90,600
L-1I o Install Erosion Control Check Stmctures 44,600
L-I0 o Install Erosion Control Check Structures 87,000
L-9 o No improvements are required. 0
L-8 o Construct 10-year channel along trailer park 947,000
10-year culvert under trailer park entrance;
Purchase property for channel and relocate 2 mobile homes
Re-aIiJm Mt. Vernon Road
L-7 o Erosion Control Check Stmctures 125,600
L-6 o Construct 10-year channel from Orion Street to S. Golden Rd.; 1,283,250
Construct 10-year culverts at Orion Street, Orchard Street, and
10th Avenue;
Construct 100-year culvert at S. Golden Road
L-5 o Construct lO-year channel downstream of S. Golden Road 153,000
L-4 o No improvements are reauired. 0
L-3 o Construct detention pond at Upper Denver West 2,747,750
L-2 o Construct 100-year culvert at Y oumdield Street 234.050
L-l o Selected toe protection. N/A
P-3 o Construct 100-year channel from upper study limit to the existing 311 ,200
improved channel ,
P-l. P-2 o No improvements are reauired. 0
AG o Install Erosion Control Check Stmctures: 440,500
Construct 10-Year culvert at Upper Driveway
Total Improvement Cost 6,783,450

* Includes 20% for Contingency and 15% for Engineering where applicable.

The plan components presented in this report are conceptual and at the preliminary design level. Prior to
implementation of the plan, final design of the improvements must be done. Some modifications to the specific
details of plan components are to be expected during final design.

35

I
I VII. Summary
I
I
This Phase B Report sets forth components of a comprehensive plan for improving drainage conditions along the
I Upper Lena Gulch, Apex Gulch, and Pleasant View Tributary drainageways. The plan represents a systematic
approach to identifying specific problem areas along the drainageways and determining feasible solutions.
Economic factors as well as intangible factors were considered in selection of the specific recommended plan
I components.
Table 9 contains a summary of the recommended plan components by study reach from the upstream study limits to
I the outfall into Maple Grove ReseIVOir.
The plan components presented in this report are conceptual and at the preliminary design level. Prior to
I implementation of the plan, final design of the improvements must be done. Some modifications to the specific
. .
details of plan components are to be expected during final design.
I
I
I
I
I
I
I
I
I
I
I