FLOOD00031

• Designation Number: 38
• County: Jefferson
• Community: Lakewood
• Title: Major Drainageway Planning - Sanderson Gulch, North Sanderson Gulch, and Weir Gulch Volume I
• Date: 8/1/1972
• Designation Date: 12/1/1974
• Floodplain - Doc Type: Floodplain Report/Masterplan

Estimated costs for construction, land acquisition, engineering,
legals, and miscellaneous costs are included in this section.
Construction costs are based on use of materials and techniques
indicated on plans. Alternate types of naterial for culverts
often exist, and some savings in final design may result by
carefully evaluating alternate materials.

Unit costs used for estimating purposes are indicated in the
following table. Miscellaneous costs not noted in the table
are normally based on the 1971 Cost Data book published by the
Cost Est. Unit of the Staff Design Division, Colorado Department
of Highways or Building Construction Cost Data 1972, published
by Robert Snow Means Company, Inc.

SECTION IX

ESTIMATED COSTS

UNIT COSTS

Prices for acquisition of right-of-way and structures is based
upon approximate property values in the area. All properties
to be acquired are situated in the flood plains of the particular
gulch and actual value may be highly influenced by that fact.
Table IX-2 Unit Costs tor Property Acquisition

Description Unit Cost

Industrial Areas
Normal Residential Areas
Open Areas, Undeveloped
Open Areas, Unfit for Development
due to topography
Estimated costs

$30,000/acres
10,000/acre
7,000/acre

5,000/acre

The following tables list by individual gulch the estimated cost
for improvements. These costs are broken into categories and
local entity portions to allow for better analysis of the
distribution of costs. See Tubles IX-3 through IX-6.

Table IX-I Unit Prices Used for Estimated Construction Costs

Review of Estimated Costs

Item

Excavation and Disposal in
Excavation and Disposal in
Excavation and Disposal in
Seeding (Dry Land Grasses)
Sodding (Bluograss)
Gabions (check dams, drop structures]
Riprap, Grouted
Excavation (structural]
Reno Mattress
Pavement and Sidewalks, removal and
replacement
Removal and replacement of street surface
Reinforced Concrete
Broken Concrete Riprap
Regular Riprap
Bridges
Rcinforced Concrete Pipe (price does not in-
clude excavation and baCkfill)
24"
30"
36"
42"
48"
54"
60"
72"
84"
96"
108"
38 x60
Corrugated Metal Pipe
72" X 44"
78"

Urban Areas
Restricted Open
Open Areas

Area

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Unit Cost
$l.50/cu.yd.
l.25/cu.yd.
l.OO/cu.yd.
600.00/acre
O.12/sq.ft.
35.00jcu.yd.
50.00/cu.yd.
3.00/cu.yd.
l.25/sq.tt.
1.2Vsq.tt.
2.50/sq.yd.
100.00/cu.yd.
22.00/cu.yd.
25.00/cu.yd.
ll.OO/sq.ft.

The final estimated costs are generally somewhat higher than those
estimated for Phase A. The following table compares the Phase A
estimated costs to the Phase B detailed cost estimates.

Table IX-7, Comparison of Phase A and Phase E estimated costs.

Gulch Name Phase A Phase ,
Estimated Cost Estimated Cost
Sanderson Gulch - Denver $ 740,000 $ 740,000
Sanderson Gulch - Lakewood 323,000 466,000
Sanderson Gulch Total 1,063,000 1,206,000
~orth Sanderson Culch 324,000 360,000
Weir Gulch - Denver 1,530,000 1,760,000
Weir Gulch - Lakewood 420,000 574,000
weir Gulch Total 1,950,000 2,334,000
North Weir Gulch 49,000 78,000
South Weir Gulch 44,000 80,000
Total $ 3,430,000 $ 4,058.000

12.00/l.f.
14.00/1.f.
17.00/l.f.
28.00/1.r.
33.00/l.f.
40.00/1.f.
47.00/l.f.
65.00/1.f.
80.00/1.t.
90.00/l.!.
105.00/l.!.
50.00/l.t.
30.00/l.E.
40.00/l.E.

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