facilities renewal master plan - National Zoo - Smithsonian Institution

More documents

Recommendations

Info

FACILITIES MASTER PLAN ENVIRONMENTAL ASSESSMENT Impacts to Water Resources Figure 14. Natural Resources No-Action Alternative Under the No-Action Alternative, additional exhibit planning outside of the on-going Elephant Trails project would continue on a site-by-site basis. Other small scale projects would continue for site improvements, building rehabilitation, and facilities updates related to safety, health, and maintenance. No new construction is anticipated in undisturbed and natural areas of the National Zoo property. Erosion and sediment control measures would be required during any construction activities, and impacts to water resources in the No-Action Alternative would be negligible. Alternative A Under Alternative A, reclamation of parking lots and flat areas for exhibits and visitor walkways, consolidation and revitalization of visitor entrances, and renovation/expansion of older exhibits and park administration facilities would occur mainly within previously developed areas. During construction, erosion and sediment control measures would be implemented according to Washington, DC requirements, and impacts to water resources due to these activities would be negligible. The overall reduction of impervious surface SMITHSONIAN INSTITUTION – NATIONAL ZOOLOGICAL PARK 54 | P a g e
FACILITIES MASTER PLAN ENVIRONMENTAL ASSESSMENT throughout the National Zoo under Alternative A would have a minor beneficial impact to water quality. The construction of an aerial tram would require clearing of a section of undeveloped forest within close proximity to Rock Creek. The loss of vegetation could potentially cause minor adverse impacts to water quality. The creation of the Discovery Zone and Stormwater Management exhibit at the current Parking Lot D site occurs within the Rock Creek floodplain. The replacement of impervious surface with a functioning wetland at this location would have a minor longterm beneficial impact to water quality. Alternative B Alternative B improvements, including reclamation of designated parking lots and flat areas for exhibits and visitor walkways, consolidation and revitalization of visitor entrances, and renovation/expansion of older exhibits and park administration facilities, would also occur mainly within previously developed areas. During construction, erosion and sediment control measures would be implemented according to Washington, DC requirements, and impacts to water resources due to these activities would be negligible. The reduction in the total amount of impervious surface throughout the National Zoo would have a net beneficial impact to water quality. The construction of a new service road from Amazonia Science Gallery to Bird Hill through an intact forest area would require a crossing over a Rock Creek tributary. Erosion and sediment control measures would be in place during construction, however, the addition of new impervious surface to this undeveloped area would have minor adverse impacts to water quality. Alternative C (Preferred Alternative) Under Alternative C, reclamation of parking lots and flat land areas for exhibits and visitor walkways, consolidation and revitalization of visitor entrances, and renovation/expansion of older exhibits and park administration facilities would occur mainly within previously developed areas. During construction, erosion and sediment control measures would be implemented according to Washington, DC requirements, and impacts to water resources due to these activities would be negligible. The reduction of impervious surface throughout the National Zoo under Alternative C would have a net beneficial impact to water quality. The construction of an aerial tram would require clearing of a section of undeveloped forest within close proximity to Rock Creek. The loss of vegetation could potentially cause minor adverse impacts to water quality. Construction of a new service road from Amazonia Science Gallery to Bird Hill through an intact forest area would require a crossing over a Rock Creek tributary. Erosion and sediment control measures would be in place during construction, however, the addition SMITHSONIAN INSTITUTION – NATIONAL ZOOLOGICAL PARK 55 | P a g e
Page 1:
SI # 0333114 FACILITIES MASTER PL A
Page 4 and 5:
This page intentionally left blank.
Page 6 and 7:
FACILITIES MASTER PLAN ENVIRONMENTA
Page 8 and 9:
Page 10 and 11: FACILITIES MASTER PLAN ENVIRONMENTA
Page 110 and 111:
Page 112 and 113:
Page 114 and 115:
Page 116 and 117:
Page 118 and 119:
Page 120 and 121:
Page 122:
show all

facilities renewal master plan - National Zoo - Smithsonian Institution

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?