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What's
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UNHSC Design Specifications for Porous Asphalt Pavement and Infiltration Beds See the October 2009 revisions to these specs here>> Please note, clarifications and changes have been made with respect to subbase compaction that directly impact pavement durability.
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Protecting Water Resources
and Managing Stormwater: A Bird’s Eye View for New Hampshire Communities
UNHSC, in partnership with the UNH Cooperative Extension, has produced a new guide focused on what local communities can do to protect water resources and manage stormwater runoff. Get it here>>
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UNHSC
Subsurface Gravel Wetland Design Specifications
These specs are now available here>>
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Runoff Volume Reduction and Climate Change Mitigation using LID-SWM
Research results from four years of intense monitoring of LID systems at the UNHSC were integrated in site level hydrologic assessment models. More>>
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Polycyclic Aromatic Hydrocarbons (PAHs) in Sealcoat
The UNHSC is studying the impact of parking lot sealcoat on stormwater runoff. More>>
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UNH: Pavement Sealcoat A Source of Toxins in Stormwater Runoff
New research indicates that sealcoat may contribute to increasingly significant amounts of polyaromatic hydrocarbons entering waterways from stormwater runoff. More>>
Campus Journal, 04.08.09
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Winter Maintenance Guidelines for Porous Pavements fact sheet now available here>>
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Seasonal Performance Variations for Storm-Water
Management Systems in Cold Climate Condition
This new journal article by the Center is available here>>
Journal of Environmental Engineering, March 2009
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MassDEP is Proposing a New, Comprehensive Stormwater General Permit for New, Re-Development, and Existing Development
MassDEP will require private owners of large impervious surfaces (including institutions, commercial, industrial and residential properties) to manage stormwater. The program creates a level playing field by requiring that the responsibility for managing stormwater be shared between private property owners and municipalities. This program is tiered for areas within and without TMDL impaired watersheds with triggers of 2 and 5 acres of imperviousness. New and redevelopment requirements have varying levels of controls and infiltration, and within impaired watersheds can require substantial load reductions. Of notable significance, is the requirement for existing development to meet these new standards. More information is available here>>
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New Guidance from New Hampshire Department of Environmental Services
There are significant revisions to the regulations that govern land disturbance under the Alteration of Terrain program, a revamping of the New Hampshire Stormwater Manual, and a new handbook that we can use to help design projects.
- NH DES stormwater regulations, effective January 1, 2009, are available here>>
- NH DES has revised and updated the NH Stormwater Manual. The new manual comes in three volumes:
- Volume 1: Stormwater and Antidegradation
- Volume 2: Post-Construction Best Management Practices Selection and Design
- Volume 3: Erosion and Sediment Controls During Construction
The manual is available online here>>
- NH DES issued a guidance document titled, Innovative Land Use Planning Techniques: A Handbook for Sustainable Development, to address the need for guidance and technical assistance on Innovative Land Use Controls by municipalities. The handbook includes sections dealing with development density, environmental characteristics, and site level design. The document can be found here>>
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