Supplement to the Annual Work Plan, Fiscal Year 1994 National Biological Survey. 1994. Supplement to the Annual Work Plan, Fiscal Year 1994, for the Upper Mississippi River System Long Term Resource Monitoring Program. National Biological Survey, Environmental Management Technical Center, Onalaska, Wisconsin, January 1994. EMTC 93-P006A. 12 pp. (NTIS #PB94-145752) ABSTRACT The mission of the Long Term Resource Monitoring Program (LTRMP) is to provide decision makers with information needed to maintain the Upper Mississippi River System (UMRS) as a viable large river ecosystem, given its multiple-use character. Congress has declared the System to be both a nationally significant ecosystem and a commercial navigation system. The long- term goals of the Program are to (1) understand the UMRS ecosystem, (2) monitor trends and impacts with respect to selected resources, (3) develop resource management alternatives, (4) manage information, and (5) develop useful products. The LTRMP was authorized under the Water Resources Development Act of 1986 (Public Law 99-662) as an element of the U.S. Army Corps of Engineers' Environmental Management Program. The original authorization provided for a 10-year program (1987-1997). Authorization was subsequently extended 5 years (to 2002) by Section 405 of the Water Resources Act of 1990 (Public Law 101-640). This Supplement to the Annual Work Plan for FY 1994 has been prepared for the U.S. Army Corps of Engineers by the National Biological Survey, Environmental Management Technical Center. This Supplement details additional work to be accomplished during FY 1994 as a result of reduced Program overhead (from 38% to 19%) and minor amendments to Tasks 2.2.6.5 and 2.2.6.6 of the FY 1994 AWP, providing a savings of $398,000 to meet Program goals and objectives in FY 1994. KEYWORDS river research, long-term data, environmental plan, monitoring plan, riverine habitat projects