Abstract. Since 1986, a modeling procedure has been used in the Wyoming Abandoned Mine Land Program for conserving wetland values for waterfowl and other species. The model was initially applied to the reclamation of abandoned bentonite workings but was adapted for use on abandoned uranium pits and other reclamation projects. Use of the procedure produced repeatable output and provided an accounting system that facilitated the resolution of differences in program and agency goals, and quickly became a negotiating medium that provided a basis for agreement on reclamation design. The model was designed to conserve wetland habitat values for waterfowl, but experience showed that this process also conserved other functional values of wetlands. Model parameters reflect habitat needs of breeding and migrating Anatidae species. The process was applied to 976 wetlands on eight Abandoned Mine Land project sites and resulted in post-reclamation conditions that included: a 9.7% gain in wetland habitat values, a reduction in both numbers (65.3%) and acres (33.2) of wetlands, and a 90% increase in the average size of wetlands (1.00 to 1.90 A). Costs can be paid back within as little as three years, with recreational fishing providing most of the pay-back.
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