Change: Including sediment characterization, impact to aquatic wildlife & plants, water quality, impact to manmade facilities (including downstream properties);Design - ThisAddressing removal, site & streambed steprestoration and addressesrecreational removal;potential; andDam removal & stream restoration - Addressing construction sequencing, site protection,   View changes from previous version. (Word count: 327)  View all updates.

Change: are not dams.(Source: The Safe Dams Act of 1973)Generally speaking, in the United States dams have a design life of 50 years. The dams built in the 1960's that generate electricity (hydroelectric dams) ewere granted a 50 year license by the Federal Energy Regulatory Commission.   View changes from previous version. (Word count: 240)  View all updates.

Change: Created by WilliamWarren001 May 26 2010, 3:40 PM EDT for: no reason given  View all updates.

Change: There were only format changes (bold, italics, etc.) in this version. See this version for details. (Word count: 391)  View all updates.

Change: filter, biofiltrationPERFORMANCE CRITERIAPerformance criteria measure the concentration of the undesirable substance in the water after passing through the biological filter in addition to the difference in the concentration of the undesirable substance in the water before and after passing through the biological filter.ILLUSTRATIONPhoto of   View changes from previous version. (Word count: 361)  View all updates.

Change: swale, degree of treatmentPERFORMANCE CRITERIAlength, slope, cross-section area, soil depth, quantity of stormwater intercepted and/or treatedILLUSTRATIONHow to fix the desert and remove salt from the ground with a swaleWhat's a swale?CASE STUDIESHigh Point, Seattle, WashingtonOlympic Sculpture Park, Seattle, WashingtonWaterworks   View changes from previous version. (Word count: 211)  View all updates.

Change: funds (better known as Activity 8 - Rail Corridor Preservation). Like most Federal projects, this Activity requires a 20% (either monetary or in-kind) match by the local jurisdiction. This program began in 1992 and accounts for approximately 9% of Transporyation Enhancement funds.ILLUSTRATIONRedmond city standards for trails.CASE STUDIES   View changes from previous version. (Word count: 225)  View all updates.

Change: , New YorkADDITIONAL RESOURCESRails to Trails Conservancy'sTrail Building ToolboxMany standards that have developed by the Federal Government (i.e. USDA, FHWA, NPS, etc...) are available at http://www.fhwa.dot.gov/environment/rectrails/manuals.htmPortland, Oregon'sTrail Design GuidelinesMark Fenton speaks in these three videos about the importance of walking. From Trailfest 2007.   View changes from previous version. (Word count: 159)  View all updates.

Change: A timely topic is that of what is acceptable in detectable warning (see Section 4.29). For additional information, see ADA Detectable Warning Bulletin (02.17.06); andConstruction Tolerances - Section 3.2 states "All dimensions are subject to conventional building industry tolerances for field conditions."Sidewalk Design Guidelines and Existing Practices   View changes from previous version. (Word count: 348)  View all updates.

Change: Width - Sidewalks should be considered as accessible routes, subject to the requirements of Section 4.3. Absolute minimum requirements are a minimum width of 36", passing spaces located at every 200', maximum slopes, and a firm, stable, slip resistant finish.Sidewalk Design Guidelines and Existing PracticesILLUSTRATIONCenters for   View changes from previous version. (Word count: 268)  View all updates.