QUARRY LAKES PARKWAY, PHASES 1-4, CITY PROJECT NO. 18-04 Prepared by: Mark Thomas & Co.Inc.
Alameda CTC Project Funding Agreement No. A22-0053 Date: 8/11/2025 OFFSITE MITIGATION AS ACCEPTED BY RWQCB ON AUGUST 4, 2025 1 SEASONAL WETLAND1 AC 3.4 $1,750,000 $5,950,000
2 RIPARIAN (NEW BASIN)2 AC 2.8 $0 $0
3 CHANNEL RESTORATION (OLD ALAMEDA CREEK/LINE M CHANNEL)3LF 1800.0 $1,800 $3,240,000 4 RIPARIAN (OLD ALAMEDA CREEK/LINE M CHANNEL)3 AC 1.0 $900,000 $900,000 5 HABITAT PRESERVATION (UPLAND)4 AC 18 $45,000 $810,000 $10,900,000
$2,180,000
$13,080,000
OFFSITE MITIGATION COST OPTION 2 AS INITIALLY PROPOSED BY RWQCB 1 SEASONAL WETLAND1 AC 3.4 $1,750,000 $5,950,000
2 SEASONAL POND (NEW BASIN)2 AC 8.2 $1,750,000 $14,350,000 3 CHANNEL RESTORATION (OLD ALAMEDA CREEK/LINE M CHANNEL)3LF 1800 $1,800 $3,240,000 4 RIPARIAN (OLD ALAMEDA CREEK/LINE M CHANNEL)3 AC 0.9 $900,000 $765,000 5 HABITAT PRESERVATION (UPLAND)4 AC 18 $45,000 $810,000 $25,115,000
$5,023,000
$30,138,000
Notes
1 For Basin 2C, and isolated wetlands (3:1 P; 0.3:1 T)
2 Option 1: (at 1:1 riparian) Option 2: (at 3:1 Pond)
3 For Line M (2:1 P) and OAC (3:1 P; 0.3:1 T); Includes earthwork and riparian 4 For CTS/CRLF upland for USFWS (not Water Board)
5 Unit prices include dsign, R/W construction and 10 year monitoring TOTAL
SUBTOTAL=
CONTINGENCY (20%)=
GRAND TOTAL =
ITEM No. ITEM DESCRIPTION UNIT QUANTITY UNIT PRICE
SUBTOTAL=
CONTINGENCY (20%)=
TOTAL OFF-SITE MITIGATON =
Offsite Mitigation Cost Estimate - Option 2
3:1 Pond Mitigation for New Basin (Line M Detention Basin) Offsite Mitigation Cost Estimate - Option 1
1:1 Riparian Mitigation for New Basin (Line M Detention Basin) ITEM No. ITEM DESCRIPTION UNIT QUANTITY UNIT PRICE TOTAL