Before the FERC Application for New License for the Annex Creek ...

E-27
north of the Lower Powerhouse and a short i nterti e 1i ne runs from the powerhouse
to the switchyard.
Land Use. Ex; st; ng 1 and use along the Sa 1 mon Creek road-pi pe 1 i ne ali gnment
and wi thi n the Salmon Creek Reservoi r is all re 1 ated to AELP I s hydroelectric
generation activities. No other development occurs in or near the
vicinity of the upper portion of the Salmon Creek Project, with the exception
of the existing Salmon Creek Trail. The lower portions of Salmon Creek Valley
are zoned for commercial, industrial and residential development. Actually,
the zon1 ng areas are "open-ended II and extend up the dra i nage to the towns i te
boundary; however, de facto app 1i ca t i on of zon i ng 1 s genera 11 y 1 i mi ted to
those developable portions of the lower drainage (AELP, 1982).
The Lower Salmon Creek Powerhouse is located in an area zoned for
commercial development. The district south of the power plant is zoned for
multi-family residential development; the district to the north is zoned for
single residential development (Exhibit E-2>. A more complete definition of
each zoning district is in Appendix E-8.
6.2.2 Wetlands and Floodplains
There are wetl ands borderi ng Gasti neau Channe lover a mi 1 e northwest
of the Project boundary t but the conti nued operation of the PrOject is
not expected to have any impacts on these areas. Certification of consistency
with the Alaska Coastal Management Program and a copy of the Coastal Project
Questionnaire, requested by the Alaska Office of Management and Budget, Division
of Governmental Coordination, are included as Appendix E-9.
The floodplain at the mouth of Salmon Creek between the beach at
Gastineau Channel and El 1400 (Exhibit E-2) has been defined by the Alaska
District, Corps of Engineers and is described as follows:
liThe Corps of Engineers est"imates an Intermediate
Regional Flood (IRF) would discharge 3,200 cfs, with
the water level reaching an elevation of 7 m (23 ft.)
above the Glacier Highway Bridge, and 7.8 m (25.5 ft.)
at a poi nt 180 m (600 ft.) upstream from the bri dge.
An IRF is a flood which, based on statistical analysis
of past hydro10gi c records, is expected to occur once
every 100 years, or which has the probability of occurrence
of 1 percent each year. Within the defined
floodplain, a 15 m (50 ft.) wide buffer on each side of
the stream is recommended for adequate flood protection
(U.S. Corps of Engineers, 1969).11
6.2.3 Protection of Land Management,
Aesthetics, and Recreational Values
No new construction and no changes in operation are planned for the
Salmon Creek Component; therefore, the continued operation of the facility ;s