113 STAT. 302 PUBLIC LAW 106-53—AUG. 17, 1999 $9,128,000, with an estimated Federal cost of $7,073,500 and an estimated non-Federal cost of $2,054,500, at an average annual cost of $556,000 for periodic nourishment over the 50-year life of the project, with an estimated annued Federal cost of $431,000 and an estimated annual non-Federed cost of $125,000. (b) PERIODIC BEACH NOURISHMENT.— Periodic beach nourishment is authorized for the project in accordance with section 506(a)(2) of the Water Resources Development Act of 1996 (110 Stat. 3757). SEC. 314. NASSAU COUNTY, FLORmA. The project for beach erosion control, Nassau County (Amelia Isleuid), Florida, authorized by section 3(a)(3) of the Water Resources Development Act of 1988 (102 Stat. 4013), is modified to authorize the Secretary to construct the project at a total cost of $17,000,000, with an estimated Federal cost of $13,300,000 and an estimated non-Federgd cost of $3,700,000, at an average annual cost of $1,177,000 for periodic nourishment over the 50-year life of the project, with an estimated annual Federal cost of $807,000 and £Ui estimated annual non-Federal cost of $370,000. SEC. 315. MIAMI HARBOR CHANNEL, FLORIDA. The project for navigation, Miami Harbor Channel, Florida, authorized by section 101(a)(9) of the Water Resources Development Act of 1990 (104 Stat. 4606), is modified to include construction of artificial reefs and related environmentsJ mitigation required by Federal, State, and loc£d environmental permitting agencies for the project, if the Secretary determines that the project as modified is technically sound, environmentally acceptable, and economically justified. SEC. 316. ST. AUGUSTINE, ST. JOHNS COUNTY, FLORIDA. The project for shore protection and storm damage reduction, St. Augustine, St. Johns County, Florida, authorized by section 501(a) of the Water Resources Development Act of 1986 (100 Stat. 4133) is modified to include navigation mitigation as a project purpose and to be carried out by the Secretary substantially in accordance with the general reevaluation report dated November 18, 1998, at a total cost of $17,208,000, with an estimated Federal cost of $13,852,000 and an estimated non-Federal cost of $3,356,000, and at an estimated average annual cost of $1,360,000 for periodic nourishment over the 50-year life of the project, with an estimated annual Federal cost of $1,095,000 and an estimated annual non- Federal cost of $265,000. SEC. 317. MILO CREEK, IDAHO. The Secretary shall reimburse the non-Federal interests for 65 percent of the reasonable costs of flood control for the South Division Street Segment, Milo Creek Flood Control Project, Idaho, to be constructed by the State of Idaho as described in the provision entitled "Add Alternative I" in the Milo Creek Phase II plans and specifications dated April 1999. SEC. 318. LAKE MICHIGAN, ILLINOIS. (a) IN GENERAL. —The project for storm damage reduction and shore protection. Lake Michigan, Illinois, from Wilmette, Illinois, to the Illinois-Indiana State line, authorized by section 101(a)(12) of the Water Resources Development Act of 1996 (110 Stat. 3664),
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