FLOOD08721

• County: Logan
• Community: Sterling
• Basin: South Platte
• Title: City of Sterling and Logan County Flood Hazard Mitigation Feasibility Study
• Date: 2/1/1998
• Prepared For: Logan County
• Prepared By: ICON Engineering, Inc.
• Floodplain - Doc Type: Flood Mitigation/Flood Warning/Watershed Restoration

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Table 9
Preliminary Cost estimate
Alternative No.2
100.yr. Levees Along Pawnee Creek

Item Unit Quantltv Unit Cost Cost
1. General
Mobilization (Max. 5% onotal Cost) LS 1.0 $50,000 $50,000
LS 1.0 $50,000 $50.000
2. Levees (includes raising CR 33)
Clearing & Grubbing AC 11.3 $500 $5,650
Remove and Replace Topsoil CY 18240.0 $2 $36,480
Fill for Levees (includes Ring Levees) CY 46124.0 $3 $138,372
Seeding and Revegetation AC 11.3 $3,500 $39,550
Asphalt on CR 33 (540' x 24') SY 1440.0 $12 $17,280
Gravel Replacement on Private Drive CY 360.0 $15 $5,400
3. Ring Levees
#1 LS 1.0 $16,300 $16,300
#2 LS 1.0 $9.400 $9,400
#3 LS 1.0 $27,600 $27,600
3. Install Culverts @ U.S. Highway 6 8ridge
Remove Existing Roadway SY 150.0 $4 $600
Install (4) 8 FL x 20 Fl RCB'S LF 80.0 $4.650 $372,000
Erosion Control (Type H Riprap) TN 345.0 $35 $12,075
Extend Existing Siphon Structure LS 1.0 $20,000 $20,000
4. Drop Structure
Concrete Cut-<lff Wall LS 1.0 $35,000 $35,000
Type M Rlprap TN 105.0 $30 $3,150
Type H Riprap TN 525.0 $30 $15,750
5. Channel Improvements Downstream of UPRR
Concrete Flood Wall (North Bank) CY 190.0 $500 $95,000
Excavation for Channel CY 9160.0 $3 $27,480
Seeding and Revegetation AC 0.2 $3,499 $700
Soil Cement under UPRR CY 750.0 $20 $15,000
6. Springdale Ditch Improvements
lllHnch RCP With Flap Gale LS 1.0 $17,500 $17,500

Subtotal
15% Contingency

$1.010,287
$151,543

Total Construction Cost

$1,161,830

Engineering Costs (12%)
Legal. Fiscal & Administration (5%)
Land Acquisition
Flow Easement

$139,420
$58.091
$28.250
$7.500

$2,500
$500

AC
AC

11.3
15.0

Total Project Cost" $1,395,091
. Does not include planned expansion of Highway 6 Bridge by COOT. estimated cost = $404,675